СИСТЕМА ОБЕСПЕЧЕНИЯ БУФЕРНЫМ ГАЗОМ "СУХИХ" ГАЗОДИНАМИЧЕСКИХ УПЛОТНЕНИЙ

Изобретение относится к компрессоростроению, а именно к конструкции системы обеспечения газом «сухих» газодинамических уплотнений (СГУ) центробежных компрессоров. Система обеспечения буферным газом «сухих» газодинамических уплотнений содержит трубопроводы подачи буферного газа из проточного тракта компрессора в патроны СГУ, установленные в них фильтры и обратные клапаны. При этом для одного из патронов СГУ трубопровод сообщен с всасывающим патрубком компрессора, а для другого - с нагнетательным патрубком компрессора. Данное исполнение системы обеспечения газом «сухих» газодинамических уплотнений центробежного компрессора устраняет возможность появления перетечек буферного газа из патрона СГУ во всасывающую камеру, что дает выравнивание основного потока газа и улучшение рабочих характеристик центробежного компрессора. 2 ил.

РОТОРНО-ПОРШНЕВОЙ ДВИГАТЕЛЬ

Изобретение относится к двигателестроению. Роторно-поршневой двигатель содержит корпус, ротор с цилиндрическим уступом, камеру сгорания, топливную форсунку, воздушный компрессор высокого давления и рекуперативный теплообменник для нагрева воздуха после компрессора теплом отходящих газов. Ротор расположен в торцевых крышках. Цилиндрический уступ ротора выполнен в виде профильного кулачка. В пазу корпуса установлен каркас в виде двух направляющих пластин и верхней крышки. Внутри направляющих пластин размещена радиальная лопатка. На верхней крышке смонтированы подпружиненный поршень и два подпружиненных упора с зазором 0,2…0,5 мм относительно верхнего торца лопатки. Подпружиненный поршень соединен с лопаткой. В самой лопатке и направляющих пластинах, а также в торцевых крышках и корпусе выполнены каналы для воздушного уплотнения ротора. Двигатель снабжен двумя теплоизолированными камерами сгорания периодического действия. В каждой камере установлены клапаны впуска и выпуска, топливная форсунка ...

МАГНИТОЖИДКОСТНОЕ УПЛОТНЕНИЕ ВАЛА

Магнитожидкостное уплотнение вала, содержащее корпус, вал, магнитопровод, магнитную систему, отличающееся тем, что оно образовано в виде выполненных на конце вала нескольких ступеней с увеличением их диаметра в сторону конца вала, установленного в герметичном объеме, снабжено кольцами, при этом в каждой ступени выполнены параллельные оси вала продольные каналы, а на каждой поверхности ступени смонтированы упомянутые магнитопровод с магнитной системой, между которыми установлены упомянутые кольца, выполненные с проточками и с радиальными отверстиями в проточке, корпус выполнен с радиальными сквозными каналами с возможностью сообщения с упомянутыми проточками колец, все упомянутые каналы снабжены штуцерами, а зазоры между магнитопроводом и валом заполнены магнитной жидкостью.

СТЕНД ДЛЯ ИСПЫТАНИЙ МАГНИТНЫХ ЖИДКОСТЕЙ

Сущность изобретения: магнитный узел в виде магнита с полюсными приставками установлен в корпусе. Немагнитная кольцевая вставка установлена между приставками и охватывает наружную поверхность магнита. Магнитный шунт в виде кольцевого элемента из магнитного материала охватывает магнитный узел с гарантированным зазором, образованным кольцевой проточкой, выполненной на части его внутренней поверхности или части наружной поверхности приставки и поверхностью приставки или шунта соответственно. Шунт установлен с возможностью осевого перемещения относительно магнитного узла. Системы обнаружения течи и автоматического отключения подачи сжатого газа соединены друг с другом. Со стороны наружной поверхности приставки образована герметичная камера, соединенная с системой обнаружения течи. 1 з.п. ф-лы, 2 ил.

УПЛОТНИТЕЛЬНОЕ УСТРОЙСТВО

Использование: для герметизации вращающихся валов. Сущность изобретения: в корпусе установлены охватывающие цилиндрическую уплотняемую поверхность источник магнитного поля и полюсные наконечники с выступами. Торцовые поверхности выступов выполнены коническими. Упругие герметизирующие кольцевые элементы из магнитомягкого материала с антифрикционным покрытием расположены в рабочих зазорах. Герметизирующие элементы выполнены с сечением, соответствующим поверхностям, образующим рабочий зазор между выступами полюсных наконечников и уплотняемой поверхностью. Длина сечения элемента вдоль уплотняемой поверхности выполнена не более длины проекции образующей конической поверхности выступа наконечника на образующую уплотняемой поверхности. 2 з.п. ф-лы, 3 ил.

УПЛОТНИТЕЛЬНОЕ УСТРОЙСТВО

Уплотнительное устройство относится к уплотнительной технике и может быть использовано во всех отраслях народного хозяйства для герметизации вращающихся валов при передаче движения в газовые и жидкостные среды. Уплотнительное устройство содержит плавающее кольцо, корпус, охватывающий торцовые поверхности плавающего кольца, и уплотнитель, герметизирующий соединение плавающего кольца с корпусом. На втулку, которой снабжено устройство, установлено с зазором плавающее кольцо. В канавках плавающего кольца размещены контактные уплотнители, например манжеты. Изобретение повышает надежность устройств. 2 ил.

ШНЕК ДЛЯ ПЕРЕМЕЩЕНИЯ ТВЕРДОГО МАТЕРИАЛА С УПЛОТНЯЮЩЕЙ КОНСТРУКЦИЕЙ И СПОСОБ ПРОИЗВОДСТВА ВОССТАНОВЛЕННОГО МЕТАЛЛА С ЕГО ИСПОЛЬЗОВАНИЕМ

... 1. Уплотняющая конструкция, для герметизации промежутков между печью для нагревания твердого материала и поднимаемым шнеком для перемещения твердого вещества, проходящим через боковые стенки нагревательной печи, при этом шнек для перемещения твердого вещества содержит ведущий вал, выполненный по существу горизонтально, и спиралевидную лопасть, закрепленную на ведущем валу, причем ведущий вал проходит через сквозные отверстия для ведущего вала шнека, которые образованы в боковых стенках нагревательной печи, а каждое из сквозных отверстий имеет вертикальный размер, превышающий диаметр ведущего вала по меньшей мере на амплитуду подъема шнека для перемещения твердого вещества, причем ведущий вал поддерживается посредством поднимаемых опорных устройств, которые расположены снаружи нагревательной печи, причем предусмотрены уплотнительные блоки, прикрепленные на внешних краях сквозных отверстий для ведущего вала шнека, которые окружают сквозные отверстия снаружи нагревательной печи по периферии ...

МАГНИТОЖИДКОСТНОЕ УПЛОТНЕНИЕ

Магнитожидкостное уплотнение относится к машиностроению и может быть использовано для герметизации вращающихся валов, работающих в условиях вакуума, газовых и биологических средах и т. п. Уплотнение содержит размещенные в цилиндрическом корпусе источник магнитного поля, выполненный в виде дискообразных постоянных магнитов, полюсные наконечники, образующие с валом кольцевые зазоры, заполненные магнитной жидкостью, установленный на валу подшипник скольжения, взаимодействующий наружными торцовыми поверхностями с внутренними торцовыми поверхностями полюсных наконечников, в аксиальных отверстиях подшипника скольжения беззазорно установлены дискообразные магниты источника магнитного поля, а внешняя цилиндрическая поверхность подшипника скольжения взаимодействует с внутренней поверхностью корпуса уплотнения.

ЖИДКОСТНОЕ УПЛОТНЕНИЕ ГОРИЗОНТАЛЬНЫХ СОЕДИНЕНИЙ

... 1. Жидкостное уплотнение горизонтальных соединений, содержащее предусмотренную в нижнем фланце кольцевую полость с вертикальными концентрическими стенками для размещения расплавляемого при рабочих параметрах металлического уплотнения и мелкопористого запирающего слоя из несмачиваемого расплавом материала, а на верхнем фланце - ступенчатый выступ со стороны запирающего слоя, отличающееся тем, что, с целью повышения надежности герметизации, стенка полости со стороны среды избыточного давления имеет уступ для размещения над ним металлического уплотнения. 2. Уплотнение по п.1, отличающееся тем, что торец выступа имеет форму гребенки с вертикальными боковыми стенками зубьев.

СПОСОБ УПЛОТНЕНИЯ

Способ уплотнения, заключающийся в создании уплотнительного устройства с регламентируемым зазором, отличающийся тем, что нефть или нефтепродукт охлаждают в зазоре уплотнительного устройства до аномального понижения вязкости с образованием на рабочих поверхностях уплотнения слоев седиментированного продукта с высоким уровнем энергии активации вязкого течения.

Система уплотнений вращающегося вала

Изобретение м.б. использовано в уплотнениях устр-в с агрессивными, вэрывоопас- ными или токсичными средами. Цель изобретения - повышение надежности системы уплотнений вращающегося вала за счет предотвращения перетечек рабочей среды из полости (П) высокого давления в П низкого давления. В корпусе 1 размещен вал 2 с диском 3, образующий со стороны П 9 высокого давления пару трения торцового уплотнения, в виде поджатого к диску 3 упругим элементом 5 прижимного кольца 4. Промежуточная П образована герметично закрепленным элементом 5, поверхностью корпуса 1, диском 3 и выступом 6 корпуса 1 и заполнена затворной жидкостью. В выступе 6 выполнена радиально расположенная П, связанная с источником 14 затворной жидкости и сообщенная отверстия с зазором между диском 3 и выступом 6. К П 1 низкого давления подключен источник 16 подачи газа. Промежуточная П и П 10 связаны между собой датчиком 18 разности давления , подключенным к устр-ву 22 регулирования источника 16. На корпусе 1 выполнен приемник 13 ...

Магнитожидкостное уплотнение

Использование: для герметизации подшипниковых узлов машин и механизмов в Vt условиях перекосов и смещений осей. Сущность изобретения: полюсные приставки 2 и 3 постоянного магнита 1 охватывают диск 8 и образуют с ним торцовые уплотняемые зазоры, заполненные магнитной жидкостью . Кольцевой упругий герметичный элемент 12 жестко закреплен в корпусе 14. Магнитный узел установлен на валу 4. Диск 8 выполнен из магнитомягкого материала и соединен с корпусом 14 элементом 12. На внутренней торцовой поверхности приставок 2 и 3 выполнены кольцевые проточки 5 и б, в которые установлены тела качения 7, размещенные между приставками 2 и 3 и диском 8. 1 ил. 13 (Л С XI 4 ЧЭ СЛ Ч) СЛ ...

Уплотнение вала

Изобретение относится к уплотнительной технике и позволяет повысить надежность уплотнения при радиальных биениях вала. Магнитный узел размещен в корпусе 1, установлен на валу 10 и образует торцовые уплотняемые зазоры 12, заполненные магнитоактивной композицией 13. Магнитный узел выполнен из концентрично расположенных относительно оси вала 10 и жестко соединенных между собой полюсных наконечников 3 - 6 и немагнитных проставок 7, 8, образующих соответственно цилиндрическими и торцовыми поверхностями кольцевые полости, в к-рых размещены постоянные магниты 9. Боковая поверхность периферийного наконечника 6 выполнена конической с вершиной конуса, направленной в сторону низкого давления уплотняемой среды. Кольцевая полость, образованная поверхностью корпуса 1 и боковой поверхностью наконечника 6, заполнена немагнитным высоковязким составом, нейтральным к композиции 13. 1 з.п. ф-лы, 1 ил.

Многоступенчатое магнитно-жидкостное уплотнение

Уплотнение щели для прохода элементов конвейера

Магнитожидкостное уплотнение вала

Плавкое гидроуплотнение вала двигателя электробура

Способ уплотнения поршня

Сущность изобретения: магнитную жидкость удерживают в рабочем зазоре электромагнитами . Кольцевые канавки поршня заполняют магнитной жидкостью при ходе поршня вниз через отверстия, выполненные в цилиндре и сообщенные с полостью, заполненной магнитной жидкостью. При ходе поршня вверх включают питание электромагнитов , доводя магнитную жидкость до затвердевания. 1 ил.

Уплотнение опоры вращения

Изобретение позволяет повысить надежность уплотнения опоры вращения и его функциональные возможности путем обеспечения регулирования момента трения в рабочем зазоре. Датчик выполнен в виде датчика 7 скорости вращения уплотняемого вала 3. Выход преобразователя 8 сигнала датчика 7 связан с входом импульсного преобразователя 9 один выход которого подключен к валу 3, а другой - к корпусу 2 опоры. В качестве уплотняющей жидкости использована электрореологическая жидкость 1. 1 ил.

Магнитожидкостное уплотнение

Плавкое гидроуплотнение

Магнитно-жидкостное уплотнение

Комбинированное уплотнение вала

Изобретение м.б. использовано для герметизации вала роторных машин в широком диапазоне режимов работы, в том числе ре2 . / жимов стоянки при невращающемся вале. Цель изобретения - повышение надежности комбинированного уплотнения путем отключения магнитожидкостного уплотнения в динамическом режиме. Динамическое уплотнение 3 выполнено в виде подпружиненной втулки с винтовой нарезкой, установленной на валу 2 с возможностью осевого перемещения и образующей рабочий зазор с корпусом Часть втулки выполнена ступенчатой. Ступень большего диаметра расположена под установленным в корпусе 1 с образованием зазора магнито- жидкостным уплотнением 4. 1 ил.

Уплотнение с гидрозатвором

Магнитожидкостное уплотнение

Изобретение относится к уплотн тельной технике и может быть исполь зовано для уплотнения валов, работа нлцих в условиях перепада давления. Цепью изобретения является повьппение надежности уплотнения в условиях осевых вибраций вала. Компенсация осевых вибраций вала достигается за счет размещения дополнительного кольцевого магнита 16 в. дополнительном полюсном наконечнике 1, установленном через подшипник 9 на аксиальной подвижной втулке 4 и размещенном между торцовыми поверхностями полюсных наконечников 6,7,18 и 19 основных постоянных магнитов 5,17, причем дополнительный магнит 1 6 направлен своими полюсами навстречу одноименным полюсам основных магнитов 5,17,а основноймагнит 17с полюсными наконечниками 18,19 установлен на втулке 4.1 з.п.ф-лы, 1 ил.

Уплотняющая набивка

МАГНИТОЖИДКОСТНОЕ УПЛОТНЕНИЕ

МАГНИТНО-ЖИДКОСТНОЕ УПЛОТНЕНИЕ ДЛЯ ВОЗВРАТНО-ПОСТУПАТЕЛЬНЫХ ШТОКОВ

Разрежающий поршневой насос с ртутным уплощением

Способ разгрузки многосекционного уплотнения компрессора

Комбинированное уплотнение

Г. КОМБИНИРОВАННОЕ УПЛОТНЕНИЕ , состоящее из сальникового уплотнения и магнитожидкостного уплотнения , содержащего постоянный магнит с полюсными наконечниками, о т л ичающееся тем, что, с целью снижения металлоемкости и повышения удобства эксплуатации уплотнения, полюсный наконечник со стороны атмосферы выполнен в виде кольца по крайней мере с двумя радиальными выступами . 2. Уплотнение по п. 1, отличающееся тем, что сзммарная площадь поперечного сечения радиальных выступов полюсного наконечника не меньше площади поверхности контакта (2 другого наконечника с магнитной жид- (Л костью.

Магнитно-жидкостное уплотнение

Термовакууммая камера

Сальниковое уплотнение

Магнитно-жидкостное уплотнение

Гидравлическое уплотнение для валов турбовоздуходувок и турбодвигателей

Магнитожидкостное уплотнение вала

Изобретение относится к уплотни- тельной технике и может использоваться для герметизации подвижных элементов , работающих при перепаде давления . Целью изобретения является по- вьшение надежности уплотнения за счет увеличения удерживаемого перепада давления путем увеличения времени до старения магнитной жидкости и увеличения внутреннего давления в магии- тожидкостной пробке. Выполнение на« О k /I Фи. / против каждой ступени, кроме крайних, в валу 1 по меньшей мере двух сквозных диаметральных каналов, заполненных магнитной жидкостью, приводит к тому , что в статическом положении вала 1магнитный поток через магнитную жид- жидкость уменьшается. При вращении вала магнитная жидкость, находящаяся в каналах, обменивается с магнитной жидкостью, находящейся в рабочих зазорах. Все это приводит к уменьшению старения магнитной жидкости. Кроме того, при вращении вала 1 за счет центробежных сил магнитная ждцкость находящаяся в каналах, воздействует на магнитную жидкость в пространства между крайними ...

Уплотнение выхода вала из аппарата с расплавом

Изобретение относится к уплотнительной технике и может быть использовано в аппаратах, перерабатывающих расплавы. Цель изобретения - повышение надежности работы и снижение энергозатрат за счет оптимизации геометрии зазора между валом и нарезной поверхностью втулки. Уплотнение содержит герметично установленную в стенке аппарата, охватывающую с зазором вал втулку, снабженную на внутренней поверхности винтовой нарезкой, направление которой противоположно направлению вращения вала. Втулка со стороны выхода вала снабжена средством охлаждения, а нарезная ее поверхность выполнена переменного диаметра с большим диаметром со стороны выхода вала, причем эта поверхность может быть выполнена со ступенчато переменным диаметром или с непрерывным увеличением диаметра на участке со стороны выхода вала. Увеличение зазора в уплотнении в зоне охлаждения обеспечивает оптимальные условия работы уплотнения при номинальных и переменных режимах. 2 з.п.ф-лы, 2 ил.

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УПЛОТНЕНИЕ ВРАЩАЮЩИХСЯ ВАЛОВ

Устройство для намагничивания магнитного узла магнитожидкостного уплотнения

Изобретение относится к уплот- нительной технике и может быт;, использовано для намагничивания постоянных магнитов магнитожидкостных уплотнений. Целью изобретения является уменьшение габаритов устройства при намагничивании уплотнения с разъемными полюсными приставками и обеспечение намаг}гичивания уплотнения в уплотняемом узле. УстройcTEiO для намагничивания, содержащее катушку намагничивания 1 с охватывающим ее магнитопроводом 2, дополнительно снабжено втулкой 3, установленной с возможностью осевого перемещения по валу 3 и выполненной из магнитомягкого материала. При намагничивании магнитный поток замыкается по пути: магнитопровод 2, наружное кольцо 4 разьемной полюсной приставки, постоянный магнит 7, полюсная приставка 8, рабочий зазор 9, вал 5, зазор 9, внутреннее коичьцо 6 полюсной приставки,магнитопоовод 2. Для намагничивания магнитных уз- лоя уплотнений валов с короткой консольной частью устройство может быть снабжено те;снологическим валом, пропущенным через втулку 3 и выполненным ...

Способ герметизации вакуумного соединения

Уплотнение

Использование: в компрессорах, турбинах , насосах. Сущность изобретения: в корпусе установлен магнитный узел, выполненный в виде постоянного магнита и прилегающих к его торцовым поверхностям полюсных наконечников. Наконечники образуют с валом уплотняемые зазоры, заполненные магнитной жидкостью. Магнит и наконечники выполнены в виде втулок, навитых по винтовой линии. 2 ил.

Торцовое уплотнение

Использование: для уплотнения вращающихся валов при высоких угловых скоростях в средах с большим количеством абразивных частиц. Сущность изобретения: подвижное кольцо трения установлено в неподвижном Постоянный магнит с магнитопроводами установлен на неподвижном кольце и взаимодействует с магнитоактивной порошкообразной смазкой в зоне трения. Кольца трения установлены один относительно другого с зазором , определяемым из соотношения: д /D 250, где д - зазор между подвижным и неподвижным кольцами; D - диаметр зерен магнитоактивной смазки. Твердость материала конец больше твердости магнитоактивной смазки. 1 з.п.ф-лы, 2 ил ...

Магнитожидкостное уплотнение

Изобретение относится к уплотни- тельной технике и может быть использовано для герметизации полых невращающихся элементов, например трубопро- водных линейных компенсаторов и т.д. Целью изобретения является повьшение надежности в работе при уплотнении полых невращающихся элементов, через которые проходит поток рабочей среды, за счет уменьшения расслоения магнитной жидкости. В корпусе 1 в потоке рабочей среды по оси симметрии трубопроводов 2 и 3 установлен ротор 8, снабженный крыльчаткой 9 и перемешивающим приспособлением 11, которое размещено в рабочем зазоре с магнитной жидкостью 6. Поток движущейся по . трубопроводу рабочей среды воздействует на крыльчатку 9, приводя ее во вращение, благодаря чему закрепленное на роторе перемешивающее приспособление 11 вращается в рабочем зазору, tg перемешивая магнитную жидкость 6, пре-- дотвращая ее расслоение. 1 ил. ko ...

Магнитожидкостное уплотнение вращающегося вала

Изобретение относится к магни- тожидкостным уплотнениям и может быть использовано для герметизации валов аппаратов, работающих в условиях перепада давлений. Целью изобретения является повышение надежности уплотнения в условиях осевых и радиально- угловых биений вала за счет установки магнитного узла через упругоэлас/9 J5 i (Л Vj /4 ...

Уплотнительное устройство опор вертикального вала

Изобретение относится к уплотнитель- ной технике и может быть использовано в механизмах и машинах, предназначенных для работы в условиях загрязненного воздуха при наличии высокой концентрации сыпяшейся или взвешенной пыли. Цель изобретения - повышение надежности в работе уплотнения и обеспечение работоспособности подшипниковых узлов, а следовательно, и повышение производительности механизма. Для этого гидростатическая пара каждого уплотнения опоры снабжена обхватываемым элементом Т-образного профиля и обхватывающим элементом С-образного профиля, образующие полости, расположенные ступенчато по высоте, связанные со средствами для ввода в них и вывода жидкой среды, при этом полости каналами соединены между собой. Гидростатическая пара, расположенная сверху , связана с насосом, а самая нижняя - с емкостью жидкой среды. Гидростатические пары соединены каналами, выполненными в корпусе. 1 з.п. ф-лы, 1 ил. (Л ю CD СХ) С5 со ...

Магнитожидкостное уплотнение

МАГНИТОЖИДКОСТНОЕ УПЛОТНЕНИЕ , содержащее постоянный магнит с полюсными наконечниками, магнитопровод , установленньш концентрично полюсным наконечникам и обхватываю ций их, и магнитную жидкость в рабочих зазорах, о т л и ч а ю п; е вся тем, что, с целью повышения надежности и долговечности работы уплотнения путем уменьшения расслоения жидкости, магнитопровод установлен с возможностью регулировки зазора между ним и полюсными наконечниками .

Магнитожидкостное уплотнение

Изобретение относится к уплотнительной технике и может быть использовано для герметизации вращающихся валов машин и оборудования. Целью изобретения является повышение надежности уплотнения при высоких скоростях вращения вала за счет улучшения теплоотвода от манжеты. Между полюсными наконечниками 2 и 3 постоянного магнита 1 установлена манжета 4. На полюсных наконечниках выполнены кольцевые выступы 5 и 6, расположенные не выше их среднего диаметра, и по крайней мере на одном из полюсных наконечников выполнены каналы, соединяющие полость 8 между полюсными наконечниками, заполненную ферромагнитной жидкостью 11, с их наружной торцовой поверхностью. При вращении вала 9 ферромагнитная жидкость 11 из рабочего зазора δ1по винтовой нарезке 10 перемещается к рабочей кромке манжеты 4, создавая в полости 8 избыточное давление, под действием которого ферромагнитная жидкость 11 по каналам 7 выходит за пределы полости 8. Под действием магнитных сил ферромагнитная жидкость возвращается в зазор δ1. Часть ...

Магнитожидкостное уплотнение

Магнитожидкостное уплотнение

Изобретение может быть использовано для герметизации вращающихся валов при передаче движения в газовые или жидкостные среды. Цель изобретения - повышение надежности магнитожидкостного уплотнения. Магнитная система охватывает вал 6. Ферромагнитная жидкость 7 находится в уплотняемых зазорах. Устройство компенсации радиального биения вала 6 выполнено в виде тонкостенных металлических колец 9, установленных между цилиндрическими поверхностями магнитной системы и элемента, образующего с ней радиальные рабочие зазоры, с натягом по ним. Втулка установлена на валу 6 с возможностью радиального перемещения и образованием зазоров. При постоянной величине зазоров по всей длине окружности достигается увеличение удерживаемого перепада давления. 2 з.п.ф-лы. 2 ил.

Магнитожидкостное уплотнение

Использование: для уплотнения . вращающихся валов0 Сущность изобретения: вал входит в корпус, в к-ром установлен магнитный узел„ Уплотняемые зазоры заполнены магнитной жидкостью . Магнитный узел выполнен в виде пакета из установленных вдоль оси вала кольцевых постоянных магнитов толщиной 1-2 мм и охватывающих их торцовые поверхности двух кольцевых полюсных приставок толщиной 0,2 - 0,3 мм. Между ними установлены разделительные центрирующие элементы из немагнитного антифрикционного материала . Кромки полюсных приставок отогнуты навстречу друг другу с образованием зазора между ними и валом в пределах 0,2-0,3 мм„ 1 з.п.ф-лы, 2 ил.

МАГНИТОЖИДКОСТНОЕ УПЛОТНЕНИЕ

Герметизирующее устройство опоры шарошки

Устройство для уплотнения вращающихся вертикальных валов

Магнитожидкостное уплотнение

Изобретение относится к уплотни- тельной технике и может быть использовано для герметизации валов. Целью изобретения является повышение надежности уплотнения при герметизации сред с высокой температурой за счет интенсификации теплообмена охлаждающей системой. Магнитная система маг- нитожидкостного уплотнения, выполненная в виде набора постоянных магнитов 1 и полюсных приставок 2, помещена в немагнитный корпус 3 с крышкой 4 и образует рабочий зазор 9 с втулкой 7, установленной на центрирующей насадке 6 вала 5. На втулке 7 размещен радиатор 8, образующий с валом 5 полость 10, соединенную с внешней средой. На корпусе 3 для увеличения теплообмена выполнены аксиально расположенные ребра 12, корпус может быть дополнительно снабжен направляющей рубашкой 13, формирующей воздушный поток, улучшая теплоотвод от магнитной системы. Крьшгка 4, установленная со стороны уплотняемой среды , образует с насадкой 6 и втулкой 7 зазор, ограничивающий подвод тепла от уплотняемой среды к магнитной жидкости в рабочем ...

Замораживаемое уплотнение вала

Изобретение относится к уплотни- тельной технике и может быть использовано для уплотнения валов, работающих в условиях перепада давления. Целью изобретения является повышение надежности уплотнения за счет повышения его герме- тизируюш,их свойств. В замораживаемом о уплотнении, содержащем установленный на валу 1 антифрикционный вкладыш 5, пористая втулка 6, пропитанная уплотняющей средой, выполнена в виде двух усеченных конусов, примыкающих друг к другу большими основаниями и охваченных биметаллическими вкладышами 10 и 11. Последние подсоединены к холодным слоям термобатарей . При подаче тока в термобатарею и отводе тепла от вкладышей 10, 1 1 и втулки 6 начинается переход жесткой уплотняющей среды 7 в твердую фазу. При замерзании слоев уплотняющей среды 7, примыкающих к вкладышам 10 и 11, жидкая ее часть через поры втулки 6 перемещается к поверхности вкладыша 5, обеспечивая равномерную нагрузку по всей поверхности. Вследствие изменения конфигурации вкладышей 10 и 11 возникают дополнительные ...

Магнитожидкостное уплотнение

Жидкометаллическое уплотнение штока

Изобретение м.б. использовано в жидкометзллических уплотнениях для герметизации подвижного соединения в трубопроводной арматуре для вьгсоИзобретение относится к уплот- нительной технике и может быть использовано для герметизации подвижного соединения в трубопроводной арматуре для высоких температур. Цель изобретения - повышение надежности уплотнения. Устройство соаержит шток 1, корпус уплотнения 2, в камере которого расположены запирающие элементы в виде-порошкообразной засыпки и легкоплавкий уплотняющий элемент 4, представляющий собой монолитную втулку из упругого нетканого проволочного материала металлическая резина (МР), наполненную смачивающим ее расплавом легкоплавкого металла. Уп- лотнительный элемент 4 закладывается в корпус 3 уплотнения в твердом виде. При передаче нагретой рабочей уплотняемой среды к уплотнению легкоплавкая составляющая уплотняющего ких т-р. Цель изобретения - повышение надежности уплотнения. Запирающие элементы ограничивают уплотняющий элемент 4, выполнен- .ный ...

Магнитно-жидкостное уплотнение

Магнитно-жидкостное уплотнение

Магнитожидкостное уплотнение

Изобретение может быть использовано в уплотнениях для герметизации подвижных элементов машин и приборов, работающих в средах с перепадом давления. Цель изобретения - повышение надежности уплотнения за счет улучшения условий активации магнитной жидкости. В немагнитном корпусе 1 размещен магнитный узел в виде кольцевого постоянного магнита 2 с примыкающими к его торцам полюсными приставками 3, 4. Приставки 3, 4 образуют с уплотняемым валом 5 полость и рабочие зазоры, заполненные магнитной жидкостью 6. Средство активации жидкости 6 выполнено в виде электрически соединенного с источником 9 импульсных высокочастотных электрических колебаний конденсатора. Конденсатор образован коаксиально установленными с зазором одна относительно другой втулками 10, 11, 12, 13. Втулки 10, 11, 12, 13 размещены на внутренней поверхности приставок 3, 4 и валу 5. Втулки 10, 12 вала 5 выполнены из металлической сетки и закреплены посредством перпендикулярно установленных оси вала 5 и жестко с ним связанных электроизоляционных ...

Магнитожидкостное вакуумное уплотнение

Изобретение относится к уплот- нительной технике, в частности к жидкостным уплотнениям, применяемым для герметизации подвижных элементов , работающих в условиях вакуума. Целью изобретения является повышение надежности путем увеличения времени до старения магнитной жидкости. Иглы выполнены в виде нитей из нежесткого диамагнитного материала и установлены на поверхности полюсных наконечников, обращенных к валу, с зазором между собой по периметру и оси, при этом длина их равна величине радиального зазора между зубцами и валом, кроме того феррофаза магнитной жидкости состоит из смеси ферромагнитных и парамагнитных частиц при следующем соотнощении,%: ферромагнитные частицы 88-93; парамагнитные частицы 7 - 12, Уплотнение содержит корпус 1 с установленным в нем постоянным магнитом 2, по торцам которого размещены полюсные наконечники з, 4 с зубцами на поверхности, обращенной к валу 5. Кольцевой зазор между валом 5 и полюсными наконечниками 3, 4 заполнен магнитной жидкостью 6, На поверхности полюсных ...

Уплотнительно-опорный узел вала

Изобретение может быть использовано для герметизации и смазки подшипников в приводах машин и механизмов, работающих в парогазовых средах. Цель изобретения - повышение надежности работы уплотнительно-опорного узла вала при высоких т-рах окружающей среды. Корпус 1 охватывает подшипник 2. Источники магнитного поля установлены разноименными полюсами навстречу друг другу. Немагнитные вкладыши 3,4 установлены по торцам корпуса 1. Источники магнитного поля выполнены в виде отдельных постоянных магнитов, расположенных во вкладышах 3,4 с возможностью демонтажа. Кол-во магнитов различно. Корпус 1 выполнен из ферромагнитного материала. При вращении вала магнитные потоки создают в рабочих зазорах градиентные магнитные силы, удерживающие там магнитожидкостную пробку. Изменением числа магнитов во вкладышах 3,4 изменяют соотношение магнитных потоков. 2 ил.

Магнитожидкостное уплотнение

Изобретение может быть использовано для герметизации вращающихся валов машин и механизмов при передаче движения в газовые и жидкостные среды с перепадом давления. Цель изобретения - повышение надежности работы уплотнения. В корпусе 1 размещен магнитный узел, образующий с валом 4 рабочие зазоры, заполненные магнитной жидкостью. На магнитном узле выполнены концентраторы (К) 7, 8, образующие рабочие зазоры с корпусом 1, заполненные магнитной жидкостью. Ширина К равна 0,05-0,2 ширины полюсных наконечников (Н) 5, 6, что позволяет распределить магнитные потоки в зазорах. Магнитный узел м.б. размещен в корпусе 1 из магнитного материала и выполнен в виде постоянного магнита 3 с Н 5, 6, причем К 7, 8 выполнены на наружной цилиндрической поверхности Н 5, 6. Магнитный узел может быть размещен в корпусе из немагнитного материала и выполнен в виде магнита с Н, охваченными втулкой из магнитного материалоа, при этом К выполнены на этой втулке и образуют зазоры, заполненные магнитной жидкостью, герметизирующей ...

Уплотнительное устройство

Изобретение может быть использовано для уплотнения устройств термической обработки. Цель изобретения - повышение надежности уплотнительного устройства. В полости источника 1 магнитного поля размещена торообразная эластичная оболочка 5, заполненная ферромагнитным элементом. Внутренняя поверхность 6 оболочки 5 выполнена винтообразно закрученной относительно оси. Ферромагнитный элемент выполнен в виде двухслойного цилиндрического вкладыша 7 с осевым отверстием 8, наружный слой которого выполнен из эластичного магнитного материала, а внутренний слой, образующий отверстие 8, - из жесткой ферромагнитной трубки. Поверхность вкладыша 7 покрыта антифрикционной смазкой, что не препятствует перекатыванию оболочки 5. 1 ил.

Магнитожидкостное уплотнение вала

Изобретение может быть использовано для герметизации валов аппаратов, работающих в условиях перепада давлений. Цель изобретения - повышение надежности работы магнитожидкостного уплотнения при герметизации парогазовых агрессивных сред, воздействующих на магнитную жидкость. В корпусе 1 с крышкой 3 и основанием 2 на подшипнике 11 скольжения и упругоэластичных элементах 10 V - образной формы установлен магнитный узел. Узел выполнен в виде постоянного магнита 7 и полюсных наконечников 8, 9 с выступами. Узел образует рабочий зазор 12 с втулкой 4 вала 5. Упругоэластичный элемент 23 установлен между втулкой 4 и опорным кольцом 6, размещенным между узлом и основанием 2 с образованием с последним кольцевой полости 20. В основании 2 со стороны полости 20 выполнена кольцевая проточка 27 и каналы 24, 25 для сообщения полости 20 с уплотняемой средой. Проточка 27 заполнена адсорбентом. На торцовой поверхности кольца 6 выполнена выточка. Элемент 10 установлен между выточкой и выступом наконечника 9. Зазор ...

Опорно-уплотнительный узел

Изобретение может быть использовано для герметизации подвижных элементов приводов, работающих в условиях вакуума, газовых и жидкостных сред. Цель изобретения - повышение надежности работы опорно-уплотнительного узла. Кольцевая магнитная система охватывает вал 2 и выполнена в виде кольцевого магнита 3 с полюсными наконечниками 4, 5. В полости 8 между наконечниками 4, 5 размещен подшипник 6 скольжения, который сопряжен торцовыми поверхностями с поверхностью наконечников 4, 5. Поверхности наконечников 4, 5, обращенные к валу 2, и торцовые поверхности подшипника 6 выполнены коническими с углами при вершине конусов, направленными навстречу друг другу. В подшипнике 6 выполнены радиальные каналы 7, сообщающие полость 8 с рабочим зазором 9. Величина зазора 9 не более 8 .10 -5м. Вал 2 выполнен из немагнитного материала. Градиентное магнитное поле по длине канала 7 возможно за счет того, что при приближении к валу 2 расстояние между внутренними поверхностями наконечников 4, 5 уменьшается. 2 з.п.

Устройство для герметизации вала в емкостях

Уплотнение с гидрозатвором

Изобретение относится к уплот- нительной технике и может быть использовано в тех случаях, когда уплотняемая среда является агрессивной по отношению к материалу уплотдля герметизации внутренней полости глубинного прибора в скважинах с высокими температурой и давлением газа. Цель изобретения - повышение надежности уплотнения. В качестве затворной использована среда, нейтрализующая агрессивное воздействие уплотняемой среды на материал деталей уплотнения . Так, при использовании резиновых угототнительных элементов и железосодержащих материалов в уплотнениях для герметизации сероводорода в качестве затворной среды используют соединение на основе 1,3- диалкилсульфатов. .1 з.п. ф-лы, 3 ил.

Магнитожидкостное уплотнение

Изобретение может быть использовано для герметизации подвижных элементов машин, приборов, работающих в условиях с перепадом давления. Цель изобретения - повышение надежности магнитожидкостного уплотнения. На внешней поверхности установленной на валу 6 втулки выполнены выступы 14, расположенные по образующей втулки с образованием с кольцевыми выступами пирамидоидальных зубцов. Такие зубцы являются эффективными концентраторами электрического поля, что приводит к увеличению электрической напряженности в рабочем зазоре и позволяет создать значительный поляризационный потенциал в магнитной жидкости. 2 ил.

Уплотнительное устройство

Магнитожидкостное уплотнение

Сущность изобретения: на одной из уплотняемых поверхностей установлен магнитный узел, выполненный в виде постоянного магнита с полюсными наконечниками . Охватывающие торцовые поверхности наконечников кольцевые магнитопроводы образуют с ними и с другой уплотняемой поверхностью уплотняемые зазоры. Тела качения установлены между магнитопроводами и наконечниками. Зазоры заполнены магнитной жидкостью. Немагнитный кольцевой элемент установлен между торцовыми поверхностями магнито- проводов и соединяет их со стороны уплотняемой поверхности. Тела качения из немагнитного материала установлены между уплотняемой поверхностью и магнитопроводами . Уплотняемая поверхность и обращенные к ней поверхности магнито- проводов выполнены сферическими, соответствующими друг другу. 2 ил.

Бесконтактное уплотнение

Магнитножидкостное уплотнение

Подшипниковый узел с магнитной смазкой

ПОДШИПНИКОВЫЙ УЗЕЛ С МАГНИТНОЙ СМАЗКОЙ, содержащийвал, расположенный в подшипнике с постоянными магнитами для удержания магнитной смазки, отличающийся тем, что, с целью повышения надежности подшипникового узла, введены дополнительные магниты, размещенные в углублениях вала и расположенные напротив магнитов подшипника, при этом магниты вала и подшип- .ника, лежащие в осевом и поперечны.х сечениях, попарно обращены друг к другу одноименными и разноименными полюсами, а все магниты подшипника обращены к валу одноименными полюса.ми.<€(Ло ^сосо 4^ 1^i>& ...

Устройство для уплотнения поршня манометра

Система маслоснабжения уплотнений вала турбогенератора

Уплотнительное устройство для насосов

Магнитно-жидкостное уплотнениеВРАщАющЕгОСя ВАлА

Уплотнение поршня компрессора

Магнитное уплотнение вала

Устройство для уплотнения вала, проходящего через стенку вакуумной камеры

Уплотнительное устройство

Сущность изобретения: кольца трения установлены в корпусе. Втулки выполнены из магнитного материала. Два кольца трения направлены под углом к поверхности трения третьего кольца с образованием полости , заполненной магнитоактивным составом . Одно кольцо установлено жестко на валу, другое выполнено в виде части кольцевого магнитопровода, а третье установлено плавающим на валу между втулками, ограничивающими его осевое и радиальное перемещения . Поверхность плавающего кольца, обращенная к другим кольцам, выполнена вогнутой, поверхности колец, контактирующие с ним, выполнены ответными. Поверхность контакта плавающего кольца покрыта износостойким немагнитным материалом . 2 з.п. ф-лы, 3 ил.

VORRICHTUNG MIT KOMBINIERTER DICHTUNG / LAGERANORDNUNG

VORRICHTUNG UND VERFAHREN ZUM ABDICHTEN EINES SCHERDORNES ODER EINER SCHNECKE EINER EXTRUSIONSMASCHINE FUER KAUTSCHUKMISCHUNGEN UND/ODER KUNSTSTOFFE

DICHTUNGSANORDNUNG FUER INNENMISCHER UND VERFAHREN ZUR ABDICHTUNG

SPINDELMOTOR

Dichtungssystem für ein bewegliches Element

Die vorliegende Erfindung betrifft ein Dichtungssystem (100), mit einem beweglichen Element (101); und einem Gehäuse (103), das ein Dichtelement (105) zum Erzeugen eines Ringspaltes (107) um das bewegliche Element (101) herum und eine Druckkammer (109) zum Erzeugen eines Fluidstroms durch den Ringspalt (107) hindurch umfasst.

Lubricating system, in particular for a rear stern tube seal

In a lubricating system, in particular for a rear stern tube seal in ships, which comprises an annular chamber (4) for a liquid medium lubricating the sealing elements (22, 23), and behind it an antechamber (5), the annular chamber (4) is connected to a settling tank (2) and a pump device to form a closed circulation system. The pressure in this circulation system and in particular in the annular chamber (4) is higher than in the areas (5 and 16) adjacent to it. The antechamber (5) is filled at least partially with another liquid medium which can lubricate the seals (21, 22) from the side of the antechamber (5). However, the antechamber (5) is virtually pressureless and is provided with a conduit (53) through which other liquids, which are intended to penetrate into the antechamber (5), are diverted into the inside of the ship in such a way that although the pressure in the antechamber (5) is not increased, the said antechamber is nevertheless not completely emptied. ...

Verfahren zur Verhinderung des Entweichens von Gasen oder Fluessigkeiten, insbesondere giftiger Art, aus ihren Behaeltern

Labyrinth-Dichtung

DICHTUNG.

Shaft seal, particularly for shafts of gas-cooled generators

The present invention relates to a shaft seal, particularly one for shafts of gas-cooled generators, with a sealing ring (22) which surrounds the shaft (35), floats on an oil film, does not rotate with the shaft and, on its inside, has at least one oil outlet groove (28.8). The holding device for the sealing ring (22) consists of a guide plate (21) and of a relief flange (23) which is fastened to the guide plate (21) by means of stay bolts (24, 25) and spacer sleeves (26, 27). This construction of the holding device makes the sealing ring (22) accessible from outside, thereby facilitating the centring and readjustment of the sealing ring (22) in relation to the shaft (35). A holding device of this kind can be constructed both for single-flow seals and for double-flow seals. The construction of the seal and of the oil supply is simplified and oil consumption is minimised by the better possibilities for the adjustment of the sealing ring (22). ...

Sealing water system

A sealing water system for flushing a rotating mechanical seal includes a closed circuit. A supply pump is disposed in the closed circuit so as to act upon the rotating mechanical seal with sealing water. The closed circuit is configured to collect and recirculate the sealing water.

Shaft-Seal Device for High-Temperature Fluid

A shaft-seal device for high-temperature fluid including a seal case ( 2 ) formed as a metallic cylindrical structure of a single unit and comprised of a main body portion ( 2 a, 2 b, 2 c ), first and second holding portions ( 2 d, 2 e ), first and second partition portions ( 2 f, 2 h ), a channel formation portion ( 2 g ) forming a minute annular channel ( 27 ) with the outer circumference surface of a rotary shaft ( 1 ), and an o-ring holding portion ( 2 i ). The seal case is installed in an apparatus housing ( 8 ) with first and second o-rings ( 2 m, 2 n ) in between. The intra-seal case region (A 1 ), in which sealing rings ( 31, 32, 41, 42, 51, 52 ) of mechanical seals ( 3, 4, 5 ) are provided, and the high-temperature fluid region, which is an intra-apparatus housing region (A), are partitioned by a cooling chamber ( 28 ) into and from which coolant ( 82 ) is supplied and discharged via feed/discharge coolant paths ( 80, 81 ).

APPARATUS AND METHOD FOR MANUFACTURING METAL CONTAINERS

An apparatus and method for transferring compressed air between machine elements uses a rotary manifold in which an orifice restrictor is provided between the air supply, between each piston and shoe. The orifice restrictors meter volumetric flow rate during loading and/or unloading cans from the apparatus, thereby optimised compressed air consumption. 1. (canceled)2. A method of manufacturing metal containers , the method comprising the steps of:controlling transfer of compressed air between machine elements of the metal container manufacturing process;timing transfer of the compressed air according to events in the manufacturing process;timing events in the container manufacture process requiring compressed air;controlling volumetric air flow rate with one or more fixed orifice restrictors; andcreating a force at an interface between the machine elements, including a shoe and a disc, to create a seal between the shoe and the disc.3. A method according to claim 2 , further comprising using a single air supply.4. A method according to claim 2 , comprising transferring air from static machine elements across to rotating machine elements.5. A method according to claim 2 , further comprising controlling vacuum between machine elements.6. A method according to wherein the compressed air is supplied by more than one air supply claim 2 , each of which is at the same pressure.7. A method according to wherein the step of controlling the flow rate is performed during loading and/or unloading a container from a process machine.8. A method according to wherein the machine elements include a static machine element and a rotating machine element.9. A method according to wherein the manufacturing process is a beverage can necking process. This application is a divisional application of U.S. patent application Ser. No. 12/865,302 filed Jul. 29 2010, which is the National Stage of International Application No. PCT/EP2009/050705 filed Jan. 22, 2009, which claims the benefit of EP ...

DRY GAS SEAL STRUCTURE

The dry gas seal structure has a housing that houses a fluid in a supercritical state, a rotary shaft that penetrates the housing, rotation rings that rotate integrally with the rotary shaft, stationary rings that contact with the rotation rings when the rotary shaft is stopped and stationary positioned in a state in which sealing gaps are formed between the rotation rings and the stationary rings when the rotary shaft rotates, a circulating pipe path that supplies a portion of the fluid to inlet portions of the sealing gaps, a temperature-adjusting device that adjusts the temperature of the fluid flowing through the circulating pipe path, and a control unit that controls operation of the temperature-adjusting device so as to heat the inlet portions of the sealing gaps to a predetermined temperature before the rotary shaft is driven. 1. A dry gas seal structure comprising:a housing that houses a fluid in a supercritical state;a rotary shaft that is provided so as to penetrate the housing and is rotary-driven;rotation rings that are provided around the rotary shaft and rotate integrally with the rotary shaft;stationary rings that are provided in the housing, the stationary rings contacting with the rotation rings throughout the circumferences when the rotary shaft is stopped and stationary positioned in a state in which sealing gaps are formed between the rotation rings and the stationary rings when the rotary shaft rotates;a pipe path that supplies a portion of the fluid housed in the housing to inlet portions of the sealing gaps;a temperature-adjusting device that adjusts the temperature of the fluid flowing through the pipe path; anda control unit that controls operation of the temperature-adjusting device so as to heat the inlet portions of the sealing gaps to a predetermined temperature before the rotary shaft is driven.2. The dry gas seal structure according to claim 1 ,wherein a circulating pump is provided in the pipe path to resupply the fluid to the inlet ...

Low and Reverse Pressure Application Hydrodynamic Pressurizing Seals

The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. At least one additional groove is contained on the shaft-side face of each sealing ring segment. The additional groove(s) directs and creates pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft. A bleed hole may also be provided to create a seal between each sealing segment.

SLIDING COMPONENT

A positive pressure generating mechanism comprising a positive pressure generating groove is provided to a high-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components, and a negative pressure generating mechanism comprising a negative pressure generating groove is provided to a low-pressure side. The positive pressure generating groove and negative pressure generating groove are communicated with a high-pressure fluid side and separated from a low-pressure fluid side by a seal surface. 1. A sliding component characterized in that a negative pressure generating mechanism comprising a negative pressure generating groove is provided to a low-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components , the negative pressure generating groove being communicated with a high-pressure fluid side and separated from a low-pressure fluid side by a seal surface.2. A sliding component characterized in that a positive pressure generating mechanism comprising a positive pressure generating groove is provided to a high-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components , and a negative pressure generating mechanism comprising a negative pressure generating groove is provided to a low-pressure side , said positive pressure generating groove and negative pressure generating groove being communicated with a high-pressure fluid side and separated from a low-pressure fluid side by a seal surface.3. A sliding component according to claim 2 , characterized in that said negative pressure generating groove is provided to a low-pressure side of the other sliding surface.4. A sliding component characterized in that an external peripheral side of a pair of sliding components is a high-pressure fluid side and an internal peripheral side is a low-pressure fluid side claim 2 , a positive pressure generating mechanism comprising a ...

Sealing device

A sealing device is provided with a floating ring between an outer periphery of a rotating shaft and an inner periphery of a casing and is characterized in that a turn-stopping means is provided to a single point in a circumferential direction of the floating ring, and a groove for generating dynamic pressure is provided in unequal distribution in the circumferential direction to an inner peripheral surface of the floating ring, wherein a dynamic pressure is generated by a dynamic pressure groove provided to the inner peripheral surface of the floating ring and is employed to thereby match together the center of the rotating shaft and the floating ring.

SEALING DEVICE

A sealing device is provided with a floating ring between an outer periphery of a rotating shaft and an inner periphery of a casing and is characterized by including a plurality of inversely directed dynamic pressure generation grooves for creating an action whereby a sealed fluid attempting to leak out is pushed back. The plurality of inversely directed dynamic pressure generation grooves are provided in a circumferential direction to the inner peripheral surface of the floating ring, and thereby the amount of leaking of the sealed fluid is reduced and the center of the floating ring and the center of the rotating shaft are matched together. 1. A sealing device provided with a floating ring between an outer periphery of a rotating shaft and an inner periphery of a casing , the sealing device being characterized in that a plurality of inversely directed dynamic pressure generation grooves for creating an action whereby a sealed fluid attempting to leak out is pushed back upstream are provided in a circumferential direction to an inner peripheral surface of the floating ring.2. A sealing device provided with a floating ring between an outer periphery of a rotating shaft and an inner periphery of a casing , the sealing device being characterized in that a barrier fluid supply hole for supplying a barrier fluid toward an inner peripheral surface of the floating ring is provided , and a plurality of inversely directed dynamic pressure generation grooves for creating an action whereby a sealed fluid attempting to leak out is pushed back upstream are provided in the circumferential direction to an inner peripheral surface of the floating ring.3. The sealing device according to claim 2 , characterized in that a plurality of the barrier fluid supply holes are provided in the circumferential direction claim 2 , an inner periphery groove is provided to the inner peripheral surface of the floating ring so as to connect the plurality of barrier fluid supply holes claim 2 , and ...

DYNAMIC BACKUP RING ASSEMBLY

A seal backup ring assembly is provided that eliminates fluid differential pressure acting radially on the backup ring, preventing collapse of the backup ring against a shaft. The backup ring is assembled so that the initial clearance (extrusion gap) between the backup ring and relatively rotating member is not affected by the differential pressure acting across the assembly. This allows for an initially small extrusion gap to be present throughout the differential pressure range. 1. A sealing assembly comprising:a bulkhead housing having a portion thereof exposed to a first fluid having a pressure and having a portion thereof exposed to a second fluid, and establishing an internal cavity having a locating shoulder facing in a generally axial direction;a shaft having a portion thereof exposed to said first fluid and a portion thereof exposed to said second fluid, said shaft defining an externally-oriented sealing surface of generally cylindrical form, at least part of said sealing surface being located at least partially within said bulkhead housing and being relatively movable with respect to said bulkhead housing;a retainer located radially outward of at least a portion of said shaft and surrounding at least a portion of said shaft, said retainer defining a retaining shoulder facing generally toward said locating shoulder of said bulkhead housing;a backup ring of generally circular form located between said retaining shoulder and said locating shoulder, and having a first ring end with at least a portion thereof facing said retaining shoulder and a second ring end having at least a portion thereof facing said locating shoulder, said first and second ring ends facing in generally opposite directions, said backup ring having a ring inner surface facing generally inward toward said shaft sealing surface and establishing an extrusion gap clearance therewith, and having a ring outer surface facing generally radially outward, said backup ring having radial thickness ...

Hydrodynamic sealing element

A sealing element of a hydrodynamic seal for relatively rotating elements, having a sealing surface () and consisting of or comprising at least one stabilising ply () of fabric impregnated with or disposed n a binder material which prevents relative movement of fibres of the fabric during use of the seal. 1. A hydrodynamic sealing element for a hydrodynamic seal for relatively rotating elements , the hydrodynamic sealing element having a grooved sealing surface and including:at least one stabilizing ply of fabric impregnated with or disposed in a binder material which comprises non-elastomeric material and which substantially prevents relative movement of fibres of the fabric during use of the hydrodynamic seal; andat least one flexible ply of fabric impregnated with or disposed in an elastomeric material;said hydrodynamic sealing element having a stiffness such that the hydrodynamic sealing element can respond to changes in pressure during use of the hydrodynamic seal, while resisting bunching of the hydrodynamic sealing element due to hoop stress.2. The hydrodynamic sealing element of claim 1 , wherein the binder material is a phenolic resin or an epoxy resin.3. The hydrodynamic sealing element of claim 1 , wherein the fabric of the stabilizing ply is a woven fabric having weft threads disposed transversely of the longest dimension of the hydrodynamic sealing element.4. The hydrodynamic sealing element of claim 1 , wherein the stabilizing ply and the flexible ply are bonded together.5. The hydrodynamic sealing element of claim 1 , wherein the stabilizing ply and the flexible ply are separate and/or separable from each other.6. The hydrodynamic sealing element of claim 1 , wherein there are a plurality of flexible plies of different stiffness to each other.7. The hydrodynamic sealing element of claim 1 , wherein at least one stabilizing ply is laminated between flexible plies.8. The hydrodynamic sealing element of claim 1 , wherein a stabilizing ply is disposed on ...

FACE SEAL ASSEMBLY AND AN ASSOCIATED METHOD THEREOF

A turbomachine and a method of operating the turbomachine are disclosed. The turbomachine includes a stator, a rotor including a rotor bearing face, a face seal assembly, a first pressure cavity, and a second pressure cavity. The face seal assembly includes a seal ring including a seal bearing face, a first pressure cavity, and a plurality of isolated hydrostatic ports extending from the first pressure cavity to the seal bearing face. The face seal assembly is slidably coupled to the stator and defines a face seal clearance between the rotor and seal bearing faces. The second and third pressure cavities are defined by the stator, the rotor, and the face seal assembly. The third pressure cavity is disposed downstream of the second pressure cavity with reference to flow of a process fluid along the stator and rotor. The first pressure cavity is isolated from the second and third pressure cavities. 1. A turbomachine comprising:a stator;a rotor comprising a rotor bearing face;a face seal assembly comprising a seal ring comprising a seal bearing face, a first pressure cavity, and a plurality of isolated hydrostatic ports extending from the first pressure cavity to the seal bearing face and wherein the face seal assembly is slidably coupled to the stator and defines a face seal clearance between the rotor bearing face and the seal bearing face; anda second pressure cavity and a third pressure cavity defined by the stator, the rotor, and the face seal assembly, wherein the third pressure cavity is disposed downstream of the second pressure cavity with reference to a flow of a process fluid along the stator and the rotor, and wherein the first pressure cavity is isolated from the second and third pressure cavities.2. The turbomachine of claim 1 , further comprising:a fluid supply tube coupled to the first pressure cavity;a pressure-control device coupled to the fluid supply tube; anda control unit coupled to a pressure-control device and configured to control the pressure- ...

Dry gas seal cooling arrangement and method

The shaft seal arrangement for a rotating turbomachine shaft having a rotation axis, comprises a rotor part and a stationary part. A dry gas seal is further provided, in combination with a cooling fluid volume arranged for receiving a cooling fluid and in heat exchange relationship with the dry gas seal. A venting arrangement collectively vents exhaust cooling fluid and dry sealing gas from the shaft seal arrangement.

SEAL DEVICE

In an exemplary embodiment, a seal device that seals between a housing and a rotation shaft passing through the housing includes a floating ring arranged with a gap h with respect to the rotation shaft , wherein the floating ring includes at least one supporting means that supports in the circumferential direction. In the seal device, the floating ring follows movement of the rotation shaft even upon running for a long time, a clearance between the rotation shaft and the seal ring can be properly held, and the sealing operation by the floating ring and the vibration damping function can be exerted, and the seal device is easily assembled. 1. A seal device that seals between a housing and a rotation shaft passing through the housing , the seal device being characterized by comprising:a floating ring arranged with a gap with respect to the rotation shaft, the seal device being characterized in thatthe floating ring includes at least one supporting means that contactlessly supports in the circumferential direction.2. The seal device according to claim 1 , characterized in thatthe supporting means is arranged symmetrically with respect to a vertical line passing through center of the floating ring.3. The seal device according to claim 1 , characterized in thatthe supporting means includes a first magnet arranged in the housing, the first magnet having a magnetic pole face directed in the circumferential direction, and a second magnet arranged in the floating ring, the second magnet having a magnetic pole face directed in the circumferential direction, andthe first magnet and the second magnet are arranged so that the same poles oppose each other.4. The seal device according to claim 3 , characterized in thatmagnetic pole adjacent faces of the first magnet and the second magnet where the N pole and the S pole are adjacent to each other are respectively surrounded by a non-magnetic material.5. The seal device according to claim 2 , characterized in thatthe supporting ...

METHODS AND SYSTEMS FOR SEALING ROTATING EQUIPMENT SUCH AS EXPANDERS OR COMPRESSORS

A method and system is provided for pressure balancing one or more seals in machines such as expanders and/or compressors using the process fluid which is being expanded or compressed to provide the pressure for pressure balancing the other side of the one or more seals. The one or more seals may be part of a pressure containing chamber which may comprise a seal, a bearing and/or a gear on a rotating shaft common to the seal. An amount of pressure to be supplied to housing(s) for a machine so as to create a pressure cascade, and thereby dropping the pressure in each subsequent chamber as pressure approaches atmosphere. Pressure differentials may be directed to leak process fluid to the chamber into the process. Pressurized lube oil systems may be employed for balancing pressure and delivering lubricant to the seals, bearings and gears. 1. A system for distributing pressure across seals , comprising:a machine, configured to handle process fluid, the machine comprising a higher pressure process pipe and a lower pressure process pipe;a first pressure chamber, operatively coupled to one portion of the machine, wherein the first pressure chamber is configured to be pressurized by the process fluid, the first pressure chamber comprising one or more first chamber seals; anda second pressure chamber, operatively coupled to another portion of the machine, wherein the second pressure chamber is configured to be pressurized by the process fluid, the second pressure chamber comprising one or more second chamber seals;wherein the machine is configured to direct process fluid, via the one or more of the first chamber seals and second chamber seals,wherein at least one of the first chambers and/or second chambers is connected via a pressure balancing line to a point in the machine that is at a lower pressure than the pressure at the seal.2. The system of claim 1 , wherein the pressure balancing line is operative to assist in directing the process fluid from the first pressure ...

SEAL ASSEMBLY AND SHAFT THEREFOR

A fluid sealing assembly includes a shaft and a seal. The shaft includes a surface portion having a microstructural geometry. The seal has a radially flexible portion disposed in proximity to the surface portion having the microstructural geometry such that when the shaft is rotated a pressure differential is generated at the interface of the seal and the surface portion having the microstructural geometry that pushes or pulls fluid relative to the interface. 1. A fluid sealing assembly comprisinga shaft including a surface portion having a microstructural geometry, anda seal having a radially flexible portion disposed in proximity to the surface portion having the microstructural geometry such that when the shaft is rotated a pressure differential is generated at an interface of the seal and the surface portion having the microstructural geometry that pushes or pulls fluid relative to the interface,2. The fluid sealing assembly of claim 1 , wherein the surface portion has a microstructural geometry such that when the shaft is rotated the pressure differential pumps a buffer of fluid across the seal.3. The fluid sealing assembly of claim 1 , wherein the surface portion has a microstructural geometry such that when the shaft is rotated the pressure differential pumps a buffer of fluid between the surface portion of the shaft and the seal to dynamically lift off the seal from an outside diameter of the shaft.4. The fluid sealing assembly of claim 1 , wherein the surface portion has a microstructural geometry such that when the shaft is rotated the pressure differential adds buffer fluid into the interface of the seal and the surface portion having the microstructural geometry.5. The fluid sealing assembly of claim 1 , wherein the surface portion has a microstructural geometry such that when the shaft is rotated the pressure differential removes buffer fluid from the interface of the seal and the surface portion having the microstructural geometry.6. The fluid sealing ...

Shaft seal assembly

An illustrative embodiment of a shaft seal assembly generally includes a fixed stator, a floating stator, and a sealing member. In the illustrative embodiment the fixed stator may be formed with one or more fluid conduits that are in fluid communication with one or fluid conduits formed in the floating stator. The fluid conduits in the floating stator may be in fluid communication with one or more fluid conduits formed in a sealing member. A rotational interface may exist between the sealing member and a shaft, and the various fluid conduits may be configured to create a fluid barrier at that interface. Other embodiments of a shaft seal assembly may create a fluid barrier at a rotational interface between a rotor and a floating stator. 1. A shaft seal assembly comprising:a. a fixed stator configured for engagement with a housing, wherein said fixed stator includes an annular recess along a portion of the radial-interior surface thereof; i. a floating stator, wherein a radial-exterior surface of said floating stator is separated from said annular groove radial-interior surface in the radial dimension by a predetermined amount to create a first clearance between said floating stator and said fixed stator, and wherein a radial-interior surface of said floating stator is substantially concave in shape; and,', 'ii. a sealing member, wherein said sealing member includes a radial-exterior surface with a substantially convex shape that corresponds to the radial-interior surface of said floating stator so as to create a spherical interface therebetween, and wherein said sealing member is configured to be positioned adjacent a shaft extend from said housing; and,', 'iii. a plurality of radial bores extending from said radial-exterior surface of said sealing member to said radial-interior surface thereof, and wherein a pressurized sealing fluid may be in fluid communication with said plurality of radial bores such that said pressurized sealing fluid moves through said ...

Seal runner with controlled oil lubrication

A system is provided associated with an engine of an aircraft. The system includes a ring, a runner and at least one radially-oriented hole associated with the runner that is configured to supply oil to an interface between the runner and the ring. The at least one hole is contained within an axial projection of the ring.

Circumferential Seal with Bifurcated Flow along Multi-Axis Stepped Grooves

A circumferential seal assembly capable of dividing a gas into separate flow paths before communication between a rotatable runner and a pair of seal rings is presented. The assembly includes an annular seal housing, a rotatable runner, a pair of annular seal rings, and a plurality of groove structures. Each groove structure separates a source flow communicated into a feed groove so that a portion enters at least two grooves to form a longitudinal flow therein. Each groove includes at least two adjoining steps defined by base walls. The base walls are arranged along the groove to decrease depthwise opposite to rotation of the rotatable runner. Two adjoining base walls are disposed about a base shoulder. Each base shoulder locally redirects the longitudinal flow to form an outward radial flow in the direction of one annular seal ring. The base walls are bounded by and intersect a pair of side walls. Each side wall includes at least one side shoulder which narrows the groove widthwise and locally redirects the longitudinal flow away from the side wall to form a lateral flow in the direction of the other side wall. Each reduction to the volume of the gas at the downstream end of each groove structure increases pressure and enhances the stiffness of a thin-film layer between each annular seal ring and the rotatable runner. 1. A circumferential seal assembly with bifurcated flow comprising:(a) an annular seal housing disposed between a pair of compartments;(b) a rotatable runner;(c) a pair of annular seal rings disposed within said annular seal housing and disposed about said rotatable runner; and each said groove includes at least two adjoining steps whereby each said step is defined by a base wall, said base walls arranged along said groove to decrease depthwise in the direction opposite to rotation of said rotatable runner, two adjoining said base walls disposed about a base shoulder, each said base shoulder locally redirects said longitudinal flow to form an outward ...

SEAL DEVICE

In exemplary embodiment, a seal device that seals between a housing and a rotation shaft passing through the housing includes a floating ring arranged with a gap h with respect to the rotation shaft , wherein the floating ring includes an aligning means that contactlessly aligns a position of the floating ring . In the seal device, the automatic aligning operation of the seal ring is maintained even upon running for a long time, a clearance between the rotation shaft and the seal ring can be properly held, and the sealing operation by the seal ring and the vibration damping function can be exerted. 1. A seal device that seals between a housing and a rotation shaft passing through the housing , the seal device being characterized by comprising:a floating ring arranged with a gap with respect to the rotation shaft, the seal device being characterized in thatthe floating ring includes an aligning means that contactlessly aligns a position of the floating ring.2. The seal device according to claim 1 , characterized in thatthe aligning means includes a first magnet arranged in the housing, the first magnet having a magnetic pole face directed in the radial direction, and a second magnet arranged in the floating ring, the second magnet having a magnetic pole face directed in the radial direction, andthe first magnet and the second magnet are arranged so that the same poles oppose each other.3. The seal device according to claim 2 , characterized in thatmagnetic pole adjacent faces of the first magnet and the second magnet where the N pole and the S pole are adjacent to each other are surrounded by a non-magnetic material. The present invention relates to a seal device that seals between a housing and a rotation shaft passing through the housing, and in particular, relates to a seal device including a floating ring used for a rotation shaft of a fluid machine such as a pump.Conventionally, in a rotating fluid machine such as a pump, in order to seal a fluid, a floating ...

SEAL DEVICE

In an exemplary embodiment, a seal device for sealing between a housing and a rotating shaft which penetrates through the housing includes a floating ring arranged on the rotating shaft with a first gap h therebetween, wherein the floating ring is provided with a squeeze film damper with a second gap g being formed as a narrow gap between the squeeze film damper and the housing In the seal device, the floating ring can exhibit a sealing action by following the movement of the rotating shaft and can reduce vibrations in the circumferential direction and the radial direction of the rotating shaft. 1. A seal device for sealing between a housing and a rotating shaft which penetrates through the housing , the seal device being characterized in thatthe seal device includes a floating ring arranged on the rotating shaft with a first gap therebetween, andthe floating ring is provided with a squeeze film damper with a second gap being formed as a narrow gap between the squeeze film damper and the housing.2. The seal device according to claim 1 , characterized in that the second gap is 0.1 to 0.3 mm. The present invention relates to a seal device for sealing between a housing and a rotating shaft which penetrates through the housing, and, particularly, relates to a seal device provided with a floating ring used for the rotating shaft of a fluid machine such as a pump.Conventionally, in a rotating fluid machine such as a pump, a floating seal is used for sealing a fluid, and, for example, the one shown in is known (Hereinafter, referred to as “a conventional art 1”. For example, see Patent Document 1.). The conventional art is provided with a rotating shaft of a fluid machine, a sleeve attached to the outer periphery of the rotating shaft and rotating integrally with the rotating shaft, a seal ring loosely fitted with a clearance to the sleeve , leaf springs provided at four places on the outer circumference of the seal ring , and a retainer for storing the seal ring , and the ...

CARRIER FOR A FLYWHEEL

The present invention relates to a flywheel apparatus for energy storage and recovery including a housing within which there is a chamber in which a flywheel on a shaft rotates. The chamber is evacuated to at or near vacuum pressure, so that air resistance-related energy losses of the flywheel as it rotates are reduced. Maintaining near-vacuum pressure within the chamber requires an effective seal between the housing and the shaft. The effective seal must be maintained despite any relative movement (in particular translational movement) of the flywheel and the housing. To this end, the shaft is mounted via a bearing arrangement on a carrier on which is also mounted a sealing arrangement. The carrier is mounted on the housing such that the carrier, the bearing arrangement and the sealing arrangement move substantially together relative to the housing. 1. An apparatus comprising:a flywheel mounted on a shaft;a housing for housing the flywheel;a first carrier;a bearing arrangement; anda sealing arrangement,wherein the bearing arrangement and the sealing arrangement are mounted on the first carrier; the shaft is mounted on the first carrier via the bearing arrangement; the sealing arrangement forms a seal against the shaft; and the first carrier is mounted on the housing; wherein the carrier, the sealing arrangement and the bearing arrangement are arranged to move substantially together, relative to the housing, in a radial direction and/or in a direction parallel to the axis of the shaft.2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. An apparatus as claimed in claim 1 , wherein the first carrier claim 1 , the bearing arrangement and the sealing arrangement are arranged to move substantially together with the shaft.10. An apparatus as claimed in claim 1 , wherein the apparatus is arranged such that relative movement of the housing and the flywheel causes the movement of the first carrier claim 1 , the bearing arrangement ...

DOUBLE SEAL LUBRICATED PACKING GLAND AND ROTATING SLEEVE

One or more techniques and/or systems are disclosed for mitigating fluid loss or leakage from a fluid pump with a rotating shaft driving a pumping mechanism. A packing gland component can have an internal seal formed by two dynamic O-rings that allows for use of lubricants at high pressures, as well as an outer seal for greater prevention of fluid loss. Further, the packing gland component can be a retrofit for existing packing gland components to provide for greater life and efficiency as compared to the existing packing gland components. Additionally, in some implementations, a sleeve may be fixedly attached to the rotating shaft between the packing gland and the shaft to provide a wear point for the packing gland. 1. A one-piece seal carrier packing gland assembly that operably engages with a rotating shaft of a rotating shaft pump , and with the inside of a shaft casing of the pump , to mitigate pumped fluid leakage along the rotating shaft of the pump , comprising: a first channel disposed inside the tube portion proximate the distal end, the first channel housing a first gasket that is operably in contact with the rotating shaft to mitigate pumped fluid leakage along the shaft;', 'a second channel disposed distally from the first channel inside the tube portion, proximate the shoulder portion, the second channel housing a second gasket that is operably in contact with the rotating shaft to mitigate pumped fluid leakage along the shaft;', 'a third channel disposed between the first channel and the second channel inside the tube portion, the third channel in fluid communication with a lubrication inlet port to operably receive lubrication fluid through the lubrication inlet port to operably lubricate the contact between the shaft and the first gasket and the shaft and the second gasket; and', 'a lubrication outlet port in fluid communication with the third channel to allow lubrication fluid to exit the third channel;, 'a body comprising a proximal end and a ...

RAPID SOLID-STATE FOAMING

Disclosed, among other things, are ways to manufacture reduced density thermoplastics using rapid solid-state foaming and machines useful for the saturation of plastic. In one embodiment, a foaming process may involve saturating a semi-crystalline polymer such as Polylactic Acid (PLA) with high levels of gas, and then heating, which may produce a reduced density plastic having high levels of crystallinity. In another embodiment, a foaming process may produce layered structures in reduced density plastics with or without integral skins. In another embodiment, a foaming process may produce deep draw structures in reduced density plastics with or without integral skins. In yet another embodiment, a foaming process may utilize additives, blends, or fillers, for example. In yet another embodiment, a foaming process may involve saturating a semi-crystalline polymer such as Polylactic Acid (PLA) with high levels of gas, and then heating, which may produce a reduced density plastic having high levels of crystallinity. 117-. (canceled)18. A method , comprising:inserting a polylactic acid polymer material into a pressurized chamber, the polylactic acid polymer material having a thickness of about 0.012 inches to about 0.040 inches;exposing the polylactic acid polymer material in the pressurized chamber to a foaming agent at a pressure of at least about 500 psi for less than about ten minutes;removing the polylactic acid polymer material from the pressurized chamber; andheating the polylactic acid polymer material, thereby reducing the density of the polylactic acid polymer material.19. The method of claim 18 , wherein the thickness of the polylactic acid polymer material is about 0.020 inches to about 0.024 inches.20. The method of claim 18 , wherein the pressure is less than about 3 claim 18 ,000 psi.21. The method of claim 18 , wherein the polylactic acid polymer material is exposed to the foaming agent for at least 30 about seconds22. The method of claim 18 , wherein ...

Adjustable Seal Apparatus for Mounting a Mixing Apparatus to a Vessel

An adjustable seal apparatus for mounting a mixing apparatus having a movable shaft in sealed engagement with a wall of a vessel and in a selected orientation with respect to the wall of the vessel. The adjustable seal apparatus includes a seal mechanism for creating a gas-tight seal between the shaft of the mixing apparatus and the wall of the vessel and an adjustable mounting mechanism for selectively positioning the shaft in a desired orientation.

SEAL DEVICE

In an exemplary embodiment, a seal device 10 that seals between a housing 11 and a rotation shaft 20 passing through the housing 11 includes a floating ring 15 arranged with a gap h with respect to the rotation shaft 20, wherein the floating ring 15 includes at least one elastically supporting means 18 that supports in the circumferential direction. In the seal device, the floating ring follows movement of the rotation shaft so that the sealing operation and vibration damping function can be exerted. 1. A seal device that seals between a housing and a rotation shaft passing through the housing , the seal device being characterized by comprising:a floating ring arranged with a gap with respect to the rotation shaft, the seal device being characterized in thatthe floating ring includes at least one elastically supporting means that supports in the circumferential direction.2. The seal device according to claim 1 , characterized in thatthe elastically supporting means is arranged symmetrically with respect to a vertical line passing through center of the floating ring.3. The seal device according to claim 1 , characterized in thatan inner peripheral portion of the housing includes a recessed portion formed to extend to the radially outside,an outer peripheral portion of the floating ring includes a projecting portion projecting tothe radially outside, the projecting portion to be engaged with the recessed portion, andthe elastically supporting means is arranged between the recessed portion and the projecting portion and includes an elastic member to be stretched in the circumferential direction.4. The seal device according to claim 1 , characterized in thatthe floating ring is made of a material having a high sliding property.5. The seal device according to claim 2 , characterized in thatan inner peripheral portion of the housing includes a recessed portion formed to extend to the radially outside,an outer peripheral portion of the floating ring includes a projecting ...

SLIDING COMPONENT

Provide a sliding component that reduces the leakage rate of sealed fluid and significantly improves the lubrication characteristics at startup or stop, while being actuated by means of fluid lubrication in the rotation phase, thereby achieving the effects of sealing and lubrication at the same time. The sliding component is characterized in that: on one sealing face of a pair of sliding parts that slide relative to each other, multiple positive pressure-generating mechanisms that comprise extremely shallow parallel grooves running roughly in parallel with the sealing face and having submicron-level height differences are provided independently in the circumferential direction; the extremely shallow parallel grooves connect to the high-pressure fluid side, but are isolated from the low-pressure fluid side by a seal area; and extremely shallow thin grooves are formed at the bottom of the extremely shallow parallel grooves. 1. A sliding component characterized in that: on one sealing face of a pair of sliding parts that slide relative to each other , multiple positive pressure-generating mechanisms that comprise extremely shallow parallel grooves running roughly in parallel with a sealing face and having submicron-level height differences are provided independently in a circumferential direction; the extremely shallow parallel grooves connect to a high-pressure fluid side , but are isolated from a low-pressure fluid side by a seal area; and extremely shallow thin grooves are formed at a bottom of the extremely shallow parallel grooves.2. A sliding component according to claim 1 , characterized in that the extremely shallow parallel grooves have a depth h of 10 nm to 1 μm claim 1 , while the extremely shallow thin grooves have a depth a of 10 nm to 1 μm and pitch p of 1 to 500 μm.3. A sliding component according to claim 2 , characterized in that preferably the extremely shallow parallel grooves have a depth h of 50 to 500 nm.4. A sliding component according to claim 1 ...

SEAL OIL SUPPLY DEVICE FOR DYNAMO-ELECTRIC MACHINE, AND SEAL OIL SUPPLY METHOD

The present invention achieves oil amount reduction and size reduction in a seal oil supply device for rotating electric machine by suppressing expansion of a rotary shaft due to its temperature increase and reducing the gap between the rotary shaft and a seal ring in normal operation. In this seal oil supply device for rotating electric machine, seal oil is supplied from a seal oil pump to a seal ring of a rotating electric machine in which hydrogen gas is sealed, via a differential pressure regulation valve for regulating a pressure of the seal oil. A first route is provided for supplying the seal oil from the seal oil pump via the differential pressure regulation valve, and in addition, a second route is provided for supplying the seal oil from the seal oil pump via a relief valve. 1. A seal oil supply device for rotating electric machine , in which seal oil is supplied from a seal oil pump to a seal ring of a rotating electric machine in which hydrogen gas is sealed , via a differential pressure regulation valve for regulating a pressure of the seal oil , whereinthe differential pressure regulation valve allows passage of the seal oil controlled to have a pressure higher by a certain value than a pressure of the hydrogen gas inside the rotating electric machine,the seal oil supply device comprising:a first route for supplying the seal oil from the seal oil pump via the differential pressure regulation valve; anda second route for supplying the seal oil from the seal oil pump via a relief valve having a setting pressure adjusted to be equal to or higher than a minimum oil supply pressure.2. The seal oil supply device for rotating electric machine according to claim 1 , whereinthe setting pressure of the relief valve is set at 0.1 to 0.2 MPa-g.3. The seal oil supply device for rotating electric machine according to claim 1 , whereinthe second route is provided in parallel with the first route, andin the first route and the second route, check valves are ...

DRY GAS SEAL INCLUDING OIL REPELLANT SURFACE

A dry gas seal includes a mating ring that can be coupled a the rotating shaft to rotate with the rotating shaft, a retainer ring that can be fixedly attached to the compressor and a carrier ring moveably coupled to the retainer ring. The carrier ring including a primary ring carrying face, a rear face and a sealing surface extending between the primary ring carrying face and the rear face. The sealing surface including an oleophobic coating disposed thereon.

Tandem seal pump

A pump having tandem seals includes a pump shaft, a pump housing, an inboard seal, an outboard seal, and a gland assembly. The pump housing defines a primary chamber between an interior surface of the pump housing and an outer surface of the pump shaft when the pump shaft is disposed within the pump housing. The inboard seal, the outboard seal, and the gland assembly are configured to be disposed within the primary chamber of the pump housing. The gland assembly is disposed between the inboard seal and the outboard seal, and the inboard seal, the gland assembly, and the outboard seal are configured to form a plurality of chambers within the pump housing.

NON-CONTACT SEAL WITH MONOLITHIC/UNITARY CARRIER STRUCTURE

An assembly includes a monolithic carrier structure and a seal assembly. The monolithic carrier structure includes a carrier base and a support ring. The carrier base extends axially along the centerline. The support ring projects radially inward from the carrier base. The seal assembly is nested radially within the carrier base and axially next to the support ring. The seal assembly includes a seal base, a plurality of spring elements and a plurality of seal shoes arranged about the centerline in an annular array. The seal base circumscribes the annular array of the seal shoes. Each of the spring elements is radially between and connects a respective one of the seal shoes with the seal base. 1. An assembly for rotational equipment with an axial centerline , the assembly comprising:a monolithic carrier structure including a carrier base and a support ring, the carrier base extending axially along the centerline, and the support ring projecting radially inward from the carrier base; anda seal assembly nested radially within the carrier base and axially next to the support ring, the seal assembly including a seal base, a plurality of spring elements and a plurality of seal shoes arranged about the centerline in an annular array;the seal base circumscribing the annular array of the seal shoes; andeach of the spring elements radially between and connecting a respective one of the seal shoes with the seal base.2. The assembly of claim 1 , wherein the seal base radially engages the carrier base and axially engages the support ring.3. The assembly of claim 1 , wherein the support ring radially overlaps and is configured to provide an axial support for the spring elements.4. The assembly of claim 1 , wherein the assembly is configured such thata gap extends axially between the support ring and a first of the spring elements during a first mode; andthe first of the spring elements axially engages the support ring during a second mode.5. The assembly of claim 1 , wherein the ...

Seal

A device to provide a seal between a housing for a moving element such as a drill chain, piston or the like and the moving element. The device comprising a storage well to retain seal material, the block having an outlet connecting with an aperture in a housing enabling seal material to flow into the space between a housing and the moving element and form a seal, the device further including an inlet port enabling seal material precursor to be added into the block, and pressurising means to pressurise the seal material precursor and force it out of the aperture. 1. A device to provide a seal between a housing for a moving element and the moving element , the device comprising:a storage well to retain a seal material, the storage well having an aperture in the housing connecting the storage well with an external surface of the moving element, enabling seal material to flow into a space between the housing and the moving element; andpressurising means to pressurise the seal material and force it out of the aperture and into contact with the moving element to form a seal,wherein the device comprises an inlet port enabling a seal material precursor to be introduced into the storage well, andwherein the seal material precursor is allowed to set to form the seal material in the device.2. The device of claim 1 , wherein the seal material precursor comprises one or more pre-polymers claim 1 , the or each pre-polymer reacting in the device to form a polymer.3. The device of claim 1 , wherein the seal material precursor comprises one or more monomers claim 1 , and includes a chemical initiator to accelerate a reaction between monomers.4. The device of claim 1 , wherein the seal material precursor comprises one or more monomers claim 1 , and a reaction between monomers is initiated thermally.5. The device of claim 1 , further comprising a temperature control means to control the temperature of the seal material.6. The device of wherein the seal material precursor includes a ...

FLUID SEAL ARRANGEMENT AND METHOD FOR CONSTRICTING A LEAKAGE FLOW THROUGH A LEAKAGE GAP

The invention refers to a fluid seal arrangement for constricting a leakage flow directed through a leakage gap bordered by a rotational and a stationary component including at least one nozzle opening in the rotating and/or stationary component facing towards the rotating or stationary component of an opposite side of the leakage gap respectively in order for injecting a liquid or gaseous fluid flow through the nozzle opening into the leakage gap. The at least one nozzle opening is fluidly connected to a cooling channel inside said rotating and/or stationary component, so that said fluid flow emanating at the nozzle opening consists of a cooling fluid of the rotating and/or stationary component exclusively. 1. Fluid seal arrangement for constricting a leakage flow directed through a leakage gap bordered by a rotational and a stationary component comprising at least one nozzle opening in the rotating and/or stationary component facing towards the rotating or stationary component of an opposite side of the leakage gap respectively in order for injecting a liquid or gaseous fluid flow through the nozzle opening into the leakage gap , wherein said at least one nozzle opening is fluidly connected to a cooling channel inside said rotating and/or stationary component , so that said fluid flow emanating at the nozzle opening consists of a cooling fluid of the rotating and/or stationary component exclusively.2. Fluid seal arrangement according claim 1 , wherein the at least one nozzle opening provides a nozzle axis along which the fluid flow is directed claim 1 , and said nozzle axis is tilted relative to a radial direction of an axis of rotation of the rotational component such that a momentum of rotation of the rotating component is enhanced or decreased by the fluid flow emanating the at least one nozzle opening and impacting on the rotating or stationary component being opposite of the leakage gap to said nozzle opening.3. Fluid seal arrangement according to claim 2 , ...

Intershaft Seal Assembly with Multi-Axis Stepped Grooves

An intershaft seal assembly for maintaining separation between a piston ring and a pair of mating rings is presented. The assembly includes a piston ring interposed between forward and aft mating rings and a plurality of hydrodynamic grooves disposed along a sealing face of each mating ring. Each hydrodynamic groove further includes at least two adjoining steps wherein each step is defined by a base wall arranged to decrease depthwise in the direction opposite to rotation of an inner shaft. Two adjoining base walls define a base shoulder which locally redirects potion of a longitudinal flow within the groove to form an outward flow in the direction of the piston ring. Base walls are bounded by and intersect a pair of side walls with at least one side shoulder thereon which narrows the groove widthwise and locally redirects portion of the longitudinal flow to form a lateral flow from one side wall toward another side wall. Outward and lateral flows cooperate, with or without the longitudinal flow, to increase fluid pressure and maintain separation between the piston ring and the mating rings. 1. An intershaft seal assembly disposed between an outer shaft and an inner shaft for sealing between a higher pressure side and a lower pressure side comprising:(a) a piston ring disposed between a forward mating ring and an aft mating ring, said piston ring rotatable with said outer shaft, said forward mating ring and said aft mating ring rotatable with said inner shaft; and each said hydrodynamic groove includes at least two adjoining steps wherein each said step is defined by a base wall, said base walls arranged along said hydrodynamic groove to decrease depthwise in the direction opposite to rotation of said inner shaft, two adjoining said base walls disposed about a base shoulder, each said base shoulder locally redirects a longitudinal flow within said hydrodynamic groove to form an outward flow in the direction of said piston ring;', 'said base walls bounded by and ...

THRUST BEARING AS A SEAL

A porous media ventless thrust bearing seal is disclosed. The porous media thrust bearing may include a primary porous media thrust bearing also serving as a seal ring including porous media positioned over a plenum and a port connected to the plenum, and conductive passages for communicating pressurized fluid to the plenums through the ports of the primary ring. The porous media ventless thrust bearing may also include a treated process gas supplied to a port which is closest to the untreated process gas, at a pressure which is higher than the untreated process gas. An inert gas (or fluid in a liquid state) may be supplied to the remaining port, at a pressure which is the same as the untreated process gas. A certain amount of treated process gas may flow into the untreated process gas, and may prevent the untreated gas from entering the porous media seal. 1. A rotating equipment comprising:an assembly having a first end and a second end, wherein the second end is configured to prevent leakage of a process side gas;a rotating shaft entering the assembly at the first end; andan externally pressurized thrust bearing configured to support the rotating shaft and to seal the process side gas inside the assembly at the first end.2. The rotating equipment of wherein the second end of the assembly is capped.3. The rotating equipment of wherein the externally pressurized thrust bearing is a ventless seal.4. The rotating equipment of wherein in no additional shaft seals are required.5. The rotating equipment of further comprising radial bearings claim 1 , wherein the radial bearings are externally pressurized gas bearings.6. The rotating equipment of wherein the externally pressurized thrust bearing is configured to serve as a balance piston and wherein the externally pressurized thrust bearing further comprises four porous media rings positioned over a plurality of plenums and having conductive passages for communicating pressurized gas to the plurality of plenums through ...

CONTACTLESS SEALS FOR GAS TURBINE ENGINES

A seal for a gas turbine engine includes a first seal structure and a second seal structure. The first seal structure is separated from the second seal structure by a gap. The first seal structure includes an injector extending into the gap with an outlet that is in fluid communication with a fluid source. Fluid issuing from the outlet and against the second seal structure magnifies a vortex formed within the gap by fluid traversing the gap. 1. A seal , comprising:a first seal structure;a second seal structure separated from the first seal structure by a gap; andan injector with an outlet extending from the first seal structure into the gap, wherein the outlet is in fluid communication with a fluid source for issuing fluid against the second seal structure for magnifying a vortex formed within the gap by fluid traversing the gap.2. A seal as recited in claim 1 , wherein the second seal structure defines an impingement area with a planar surface opposite the outlet of the injector.3. A seal as recited in claim 1 , wherein the second seal structure defines an impingement area with an arcuate profile opposite the outlet of the injector.4. A seal as recited in claim 1 , wherein the first seal structure is connected to a rotor portion of a gas turbine engine.5. A seal as recited in claim 4 , wherein the first seal structure is defined by a disk cover connected to the rotor portion of the gas turbine engine.6. A seal as recited in claim 5 , wherein the injector outlet is communicative with a cavity disposed on a side of the disk cover opposite the gap.7. A seal as recited in claim 1 , wherein the first seal structure is defined by a stator portion of a gas turbine engine.8. A seal as recited in claim 1 , wherein the seal is a labyrinth seal with a first knife-edge and a second knife-edge claim 1 , wherein the injector is arranged between the first and second knife-edges.9. A seal as recited in claim 8 , wherein the first seal structure defines a swirl region between the ...

APPARATUS FOR EXCLUDING PARTICLE CONTAMINANTS FROM A GAS LIFT OFF MECHANICAL SEAL

A particulate exclusion mechanism for a gas lift off seal includes a band fixed to the stationary seal face and extending over the lift off region between the stationary and rotating seal faces, thereby forming an annular cavity surrounding the lift off region that traps barrier gas therein as it leaks through the lift off region and inhibits process fluid from entering the annular cavity and reaching the lift off region. The band can be made of a non-abrasive material such as PTFE or PEEK. The band can extend over the rotating seal face, and a portion of the band can be sufficiently flexible to allow the extended end of the band to constrict in diameter and contact the rotating seal face if the process pressure exceeds the barrier gas pressure. The extended end can include a thicker terminating portion that minimizes clearance with the rotating seal face. 1. A lift off seal including a particulate exclusion mechanism , the lift off seal comprising:a stationary seal face having a substantially cylindrical outer periphery, the stationary seal face terminating at one end in a stationary sealing surface;a rotating seal face having a substantially cylindrical outer periphery, the rotating seal face terminating at one end in a rotating sealing surface, the stationary and rotating sealing surfaces being closely adjacent to each other so as to form a lift off region therebetween;a gas barrier region configured to contain pressurized barrier gas, the gas barrier region being in fluid communication with an inner periphery of the lift off region, so that pressurized barrier gas can flow from the barrier gas region into the lift off region, an outer periphery of the lift off region being in fluid communication with a process fluid; anda band rotationally fixed to the outer periphery of the stationary seal face, said band extending axially at least over the outer periphery of the lift off region and forming an annular cavity surrounding the outer periphery of the lift off ...

SEALING DEVICE

A sealing device comprising an intermediate bushing, which is located between an outer sleeve and an inner member mounted therein so as to be movable relative thereto and which forms a gap seal, is designed in such a way that chambers that can be filled with a pressurized fluid are provided between the intermediate bushing and the adjacent outer sleeve. 1. A sealing device , comprising an intermediate bushing arranged between an outer sleeve and an inner body and movable relative thereto , the bushing cooperating with the outer sleeve and the inner body to define chambers which can be filled with a pressurized liquid.2. A sealing device according to claim 1 , wherein the chambers are laterally delimited by sealing elements.3. A sealing device according to claim 1 , wherein the intermediate bushing comprises radially oriented through-openings which open into the chambers.4. A sealing device according to claim 1 , wherein each chamber is assigned at least one through-opening.5. A sealing device according to claim 1 , wherein each chamber is designed as a circumferential annular space.6. A sealing device according to claim 1 , wherein several chambers are provided which are distributed over the circumference.7. A sealing device according to claim 1 , wherein the outer sleeve is rotatable or axially displaceable relative to the inner body.8. A sealing device according to claim 1 , wherein the seal comprises a sealing ring claim 1 , which is supported on the inner wall of the outer sleeve and on the intermediate bushing.9. A sealing device according to claim 1 , wherein the sealing ring is held in a holder.10. A sealing device according to claim 1 , further comprising rings resting against the inner wall of the outer sleeve thereby defining the chambers.11. A sealing device according to claim 1 , the intermediate bushing defining groove-like indentations defining the chambers claim 1 , which indentations are delimited in the axial direction of the intermediate bushing by ...

Bladder accumulator volume indicating device

A mechanical seal support system includes a bladder accumulator with a first connection to the top of the bladder accumulator and a second connection to the bottom of the bladder accumulator with a device that is responsive to the pressures at each of the first and second connections of the bladder accumulator for providing an output determined by the difference between the pressures. The mechanical seal support system further includes a display for displaying the output in a manner indicative of the volume of the fluid in the bladder accumulator relative to a predetermined volume.

EXPANSION SEAL

A sealing system for a gas turbine engine includes a first surface and a second surface spaced a dimension away from the first surface defining a gap through which a fluid can flow. At least one recess is formed in one of the first surface and the second surface and is oriented such that the fluid flow through the gap crosses the at least one recess. The recess is configured to restrict the fluid flow through the gap in comparison to if the at least one recess were not present, all other things being equal. 1. A stator and blade outer airseal assembly of a gas turbine engine , comprising:a blade outer airseal having a radially extending first surface relative to a gas turbine engine central axis;a stator having a radially extending second surface relative to the gas turbine engine central axis and axially offset from the first surface defining an axial gap through which a fluid can flow; andat least one recess formed in one of the first surface and the second surface oriented such that the fluid flow through the axial gap crosses the at least one recess, the recess enlarging the axial gap, thereby urging expansion and then contraction of the fluid flow through the axial gap, thereby inhibiting fluid flow through the axial gap.2. The stator and blade outer airseal assembly of claim 1 , wherein the at least one recess forms sharp corners where the at least one recess intersects with the one of the first surface or the second surface in which the recess is formed.3. The stator and blade outer airseal assembly of claim 1 , wherein the at least one recess is at least two recesses claim 1 , a first of the two recesses being formed in the first surface and a second of the two recesses being formed in the second surface.4. The stator and blade outer airseal assembly of claim 3 , wherein the first of the at least two recesses is positioned symmetrically across the gap from the second of the two recesses.5. The stator and blade outer airseal assembly of claim 3 , wherein the ...

SEAL DEVICE

In an exemplary embodiment, a sealing device includes a floating ring in a space between the outer circumference of a rotating shaft and the inner circumference of a housing , and a permeable damping member provided around an outer peripheral portion of the floating ring . The sealing device can impart a radial restoring force against the eccentricity of the rotating shaft to restore it to its axis position, and a tangential damping force to reduce the whirling of the rotating shaft. 1. A sealing device comprising: a floating ring in a space between an outer circumference of a rotating shaft and an inner circumference of a housing; and a permeable damping member provided around an outer peripheral portion of the floating ring.2. The sealing device according to claim 1 , wherein the permeable damping member is formed of a wire mesh damper formed from wire mesh composed of metallic wires or plastic wires woven into a mesh structure.3. The sealing device according to claim 1 , wherein the permeable damping member is formed in a hollow cylindrical shape.4. The sealing device according to claim 3 , wherein the hollow cylindrical permeable damping member is set such that an inner peripheral surface thereof is in contact with an outer peripheral surface of the floating ring claim 3 , and an outer peripheral surface thereof is in contact with a radially inner peripheral surface of a housing body defining the space.5. The sealing device according to claim 3 , wherein an axial width of the hollow cylindrical permeable damping member is set to a length to provide slight gaps between opposite ends thereof and opposite inner side surfaces of the housing.6. The sealing device according to claim 1 , further comprising a sealing face formed by an inner surface of the housing and a low-pressure-side side surface of the floating ring claim 1 , the sealing face being provided with an introduction recess capable of introducing sealed fluid.7. The sealing device according to claim 2 , ...

Connector for sealably engaging and disengaging contacts, and methods of making and/or using same

A connector for sealably engaging contacts therein can include a first unit having one or more first contacts that can each include an elongated shaft with a conductive tip. A second unit can have one or more closed chambers therein. Each closed chamber can contain fluid. At least one of the closed chambers can contain one or more second contacts. Each closed chamber can have at least one resilient end wall portion including a bore and a tap integrally formed with the resilient end wall portion. The bore and the tap can create a sealing engagement therebetween when not engaged with the first contact, and create a sealing engagement with the first contact when engaged with the first contact. At least a portion of each closed chamber can be configured to be movable with respect to another portion of the closed chamber.

ROTARY MACHINE

A rotary machine includes a rotor, a casing, a seal portion, and a high pressure fluid supply portion. The rotor includes a rotary shaft that rotates around an axial line and an impeller that rotates with the rotary shaft to compress a fluid; the casing defines a casing flow path through which the fluid compressed by the impeller flows and covers the rotor from an outer peripheral side; the seal portion includes an opposing surface opposite the outer peripheral surface of the rotor in the gap and seals the fluid that flows through the gap in a direction of the axial line from a high pressure side toward a low pressure side; and the high-pressure fluid supply portion supplies the fluid on the high pressure side flowing through the casing flow path to the gap. 1. A rotary machine , comprising:a rotor that includes a rotary shaft that rotates around an axial line and an impeller that rotates with the rotary shaft to compress a fluid;a casing that defines a casing flow path through which the fluid compressed by the impeller flows and covers the rotor from an outer peripheral side, wherein a gap is formed between the casing and the rotor;a seal portion that includes an opposing surface opposite the outer peripheral surface of the rotor in the gap and seals the fluid that flows through the gap in a direction of the axial line from a high pressure side toward a low pressure side; anda high-pressure fluid supply portion that supplies the fluid on the high pressure side flowing through the casing flow path to the gap,wherein the high-pressure fluid supply portion includes a plurality of ejection ports that open to the opposing surface and eject the fluid to the outer peripheral surface of the rotary shaft in a direction opposite to a rotation direction of the rotary shaft, at intervals therebetween in the direction of the axial line.2. The rotary machine according to claim 1 ,wherein the ejection ports are provided on the high pressure side from a center position of a length ...

AIR RIDING SEAL ARRANGEMENT

Air-riding seal arrangement between two components are rotatable relative to each other about a rotation axis. The seal arrangement includes an axially slidable carrier module mounted to one component and runner provided by other components. The carrier module and runner have respective and opposing annular sealing faces in a seal arrangement normal operation are axially spaced to form an air-seal therebetween separating a high-pressure region at one side of the air-seal from low-pressure region at the other side. The carrier module has a front and rear portions, and carrier module sealing face is provided by the front portion. The front portion has first and second rotation positions relative to the rear portion, the first rotation position being in normal operation, and second rotation position being in event of high speed touchdown of the annular sealing faces when contact between sealing faces rotates the front portion to the second rotation position. 1. An air-riding seal arrangement between two components that are rotatable relative to each other about a rotation axis , the seal arrangement including an axially slidable carrier module mounted to one of the components and a runner provided by the other of the components , the carrier module and the runner having respective and opposing annular sealing faces which , in a normal operation of the seal arrangement , are axially spaced to form an air seal therebetween separating a high pressure region at one side of the air seal from a low pressure region at the other side of the air seal , wherein:the carrier module has a front portion and a rear portion, the sealing face of the carrier module being provided by the front portion, and the front portion having first and second rotation positions relative to the rear portion, the first rotation position being adopted in the normal operation, and the second rotation position being adopted in the event of high speed touchdown of the annular sealing faces when contact ...

Bearing compartment oil auto-ignition mitigation

A bearing assembly for a gas turbine engine includes, among other things, a bearing housing extending along an axis to define a bearing compartment, a lubricant seal assembly adjacent to the bearing housing to bound the bearing compartment, an air seal assembly defining a vent cavity along the bearing housing, wherein a mixing cavity is defined between the lubricant seal assembly and the air seal assembly, and wherein the bearing housing defines an airflow supply passage, an airflow vent passage and a scupper passage having respective fluid ports at different circumferential positions relative to the axis, the fluid port of the airflow vent passage fluidly coupled to the vent cavity, and the fluid ports of the airflow supply and scupper passages fluidly coupled to the mixing cavity. A method of sealing for a gas turbine engine is also disclosed.

Compressor seal assembly for a turbocharger

A compressor seal assembly is disclosed. The compressor seal assembly may have a seal ring having a seal ring bore. The compressor seal assembly may also have a collar. The collar may have a cap portion having a first bore configured to receive an impeller. The cap portion may be disposed in the seal ring bore. The collar may further have a journal portion having a second bore configured to receive a shaft connectable to the impeller. The collar may also have a slinger disposed between the cap portion and the journal portion. The slinger may have a generally cylindrical shape and may have a front face. The slinger may also have a rear face opposite the front face. Further, the slinger may have a cylindrical side surface extending between the front face and the rear face. In addition, the slinger may have a groove disposed on the side surface.

EXPANSION SEAL

A sealing system for a gas turbine engine includes a first surface and a second surface spaced a dimension away from the first surface defining a gap through which a fluid can flow. At least one recess is formed in one of the first surface and the second surface and is oriented such that the fluid flow through the gap crosses the at least one recess. The recess is configured to restrict the fluid flow through the gap in comparison to if the at least one recess were not present, all other things being equal. 1. A sealing system for a gas turbine engine , comprising:a first surface;a second surface spaced a dimension away from the first surface defining a gap through which a fluid can flow; andat least one recess formed in one of the first surface and the second surface oriented such that the fluid flow through the gap crosses the at least one recess, the recess being configured to restrict the fluid flow through the gap in comparison to if the at least one recess were not present, all other things being equal.2. The sealing system of claim 1 , wherein the at least one recess forms sharp corners where the at least one recess intersects with the one of the first surface or the second surface in which the recess is formed.3. The sealing system of claim 1 , wherein the at least one recess is at least two recesses claim 1 , a first of the two recesses being formed in the first surface and a second of the two recesses being formed in the second surface.4. The sealing system of claim 3 , wherein the first of the at least two recesses is positioned symmetrically across the gap from the second of the two recesses.5. The sealing system of claim 3 , wherein the first of the at least two recesses is positioned asymmetrically across the gap from the second of the two recesses.6. The sealing system of claim 3 , wherein the first of the two recesses is dimensionally identical to the second of the two recesses.7. The sealing system of claim 3 , wherein the at least two recesses is ...

A SEAL ASSEMBLY

A seal assembly for restricting fluid leakage flow through a fluid leakage cavity defined between a first component and second component that is rotatable about an axis relative to the first component, the seal assembly comprising a fluid jet outlet configured to admit a fluid jet into the fluid leakage cavity in an upstream direction which is inclined to the axis, a first flow restriction located downstream of the fluid jet outlet and at a location such that the fluid jet admitted from the fluid jet outlet would impinge on the first flow restriction once the fluid jet has turned to flow in an axial direction, and a second flow restriction located downstream of the first flow restriction. An axial flow turbine comprising a turbine rotor mounted within a housing may incorporate such a seal assembly in a fluid leakage cavity defined between the turbine rotor and the housing. 124-. (canceled)27. An axial flow turbine comprising:a turbine rotor mounted within a housing for rotation about a turbine axis,a fluid flow inlet passage upstream of said turbine rotor arranged to direct a first fluid towards the turbine rotor in a substantially axial direction,a fluid flow outlet passage downstream of said turbine rotor, anda seal assembly provided in a fluid leakage cavity defined between the turbine rotor and the housing,wherein the seal assembly comprisesa fluid jet outlet configured to admit a second fluid into the fluid leakage cavity in an upstream direction which is inclined to the turbine axis,a first flow restriction located downstream of the fluid jet outlet and at a location such that second fluid admitted from the fluid jet outlet would impinge on the first flow restriction once the second fluid has turned to flow in an axial direction, anda second flow restriction located downstream of the first flow restriction.281. An axial flow turbine according to claim , wherein the fluid jet outlet is configured to admit the second fluid into the fluid leakage cavity in an ...

SLIDING COMPONENT

A sliding component is characterized in that dimples are provided on one sealing face of a pair of sliding parts that mutually slide relative to each other, where the cavitation formation area on the upstream side of each dimple is positioned closer to the low-pressure fluid side and the positive-pressure generation area on the downstream side is positioned closer to the high-pressure fluid side, and the fluid that has been suctioned in the cavitation formation area of each of the above dimples travels in the dimple and is returned to the high-pressure fluid side from the positive-pressure generation area. 1. A sliding component characterized in that dimples are provided on one sealing face of a pair of sliding parts that mutually slide relative to each other , where a cavitation formation area on an upstream side of each dimple is positioned closer to a low-pressure fluid side and a positive-pressure generation area on a downstream side is positioned closer to a high-pressure fluid side , and a fluid that has been suctioned in from the low-pressure fluid side of the cavitation formation area of each of the dimples travels in the dimple and is returned to the high-pressure fluid side from the positive-pressure generation area.2. A sliding component according to claim 1 , characterized in that claim 1 , of the dimples adjacent to each other in a circumferential direction claim 1 , the positive-pressure generation area of the dimple positioned on the upstream side is provided in a manner overlapping claim 1 , in a radial direction claim 1 , with the cavitation formation area of the dimple positioned on the downstream side.3. A sliding component according to claim 1 , characterized in that the positive-pressure generation area of the dimple communicates with the high-pressure fluid side via a continuous groove whose depth is equal to or greater than a depth of the dimple.4. A sliding component according to claim 1 , characterized in that claim 1 , of the pair of ...

Magnetic fluid seal

A magnetic fluid seal ( 20 ) sealing between an apparatus end ( 14 ) and a rotating shaft ( 22 ) going through the apparatus end, comprising a housing ( 38 ) comprising a magnetic flux generating means ( 28 ) generating a magnetic flux and a magnetic flux transfer means ( 24, 26 ) facing to the rotating shaft with a fine clearance and transferring the magnetic flux, and placed so as to move relatively in a radial direction of the rotating shaft with respect to the apparatus end and a magnetic fluid ( 44 ) held in the fine clearance by the magnetic flux generated by the magnetic flux generating means.

Seal Assembly for Reciprocating Compressor

A seal assembly for a reciprocating rod of a reciprocating compressor, a reciprocating compressor with the seal assembly, and a method of operating the reciprocating compressor with the seal assembly to prevent leakage of gas once the compressor has been shut down. The pressure difference between opposite sides of a static seal is kept low during normal operation to reduce wear of the static seal. When the compressor is shut down, a high pressure difference between opposite sides of the static seal assists with sealing. 1. A seal assembly for a reciprocating rod of a reciprocating compressor , the seal assembly having a first end and a second end , the first end of the seal assembly disposed towards a cylinder end of the reciprocating rod , the second end of the seal assembly disposed towards a crankcase end of the reciprocating rod , the reciprocating rod having a longitudinal axis , the seal assembly comprising:one or more packing retainers, each of the one or more packing retainers containing a respective packing configured to contact the reciprocating rod;an unsegmented seal configured to form a sealing interface with the reciprocating rod, wherein the unsegmented seal is arranged at an axial position closer to the second end of the seal assembly relative to the axial position of the one or more packing retainers, the axial position defined with respect to the longitudinal axis of the reciprocating rod;a fluid passage having a first end and a second end, the first end located at an axial position between the unsegmented seal and at least one respective packing of the one or more packing retainers, the axial position of the first end of the fluid passage defined with respect to the longitudinal axis of the reciprocating rod, the fluid passage operatively configured to vent a fluid leaking past the at least one respective packing; anda valve in fluid communication with the second end of the fluid passage.2. The seal assembly as claimed in wherein the inner ...

Sealing assembly

A sealing assembly includes a first sealing member disposed on a fixed body and a second sealing member disposed on a rotating body while facing the first sealing member, such that when the second sealing member rotates, the first sealing member and the second sealing member work in conjunction with each other to generate flow of fluid in a reverse direction and form a fluid barrier, thereby preventing leakage of the fluid.

SLIDING PARTS

Sliding parts are provided wherein a plurality of pumping areas for generating pumping action via the relative rotational sliding of a stationary ring and a rotating ring is discontinuously formed in a circumferential direction on a sealing face of one of the stationary ring and rotating ring so as to communicate with a sealed fluid-containing space. The pumping areas are provided with intake pumping areas operating in a direction in which the sealed fluid is drawn in and outflow pumping areas operating in a direction in which the sealed fluid is expelled. A plurality of dynamic pressure-generating grooves for generating dynamic pressure via the relative rotational sliding of the stationary ring and the rotating ring are formed in a circumferential direction on a sealing face of the other of the stationary ring and the rotating ring so as to communicate with the sealed fluid-containing space. 1. Sliding parts for allowing opposing sealing faces of an annular stationary ring fixed on a fixed side and an annular rotating ring that rotates along with a rotating shaft to rotate relative to one another , thereby sealing a sealed fluid present on one side in the radial direction of said relatively rotational sealing faces; the sliding parts being characterized in:a plurality of pumping areas for generating pumping action via the relative rotational sliding of said stationary ring and rotating ring being discontinuously formed in a circumferential direction on a sealing face of one of the stationary ring and rotating ring so as to communicate with a sealed fluid-containing space;said plurality of pumping areas being provided with intake pumping areas operating in a direction in which the sealed fluid is drawn in and outflow pumping areas operating in a direction in which the sealed fluid is expelled; anda plurality of dynamic pressure-generating grooves for generating dynamic pressure via the relative rotational sliding of said stationary ring and the rotating ring being ...

MACHINE TOOL

The invention relates to a machine tool, in particular a lathe grinding machine, comprising a tool spindle having a collet and a spindle motor, wherein the collet has at least two clamping jaws which are actuatable for receiving and releasing a tool, and comprising an air channel which runs radially on the outside of the collet, wherein the air channel is configured as a sealing air channel () and forms a positive pressure chamber () at least partially above the clamping jaws (). 1. A machine tool comprisinga tool spindle having a collet chuck and a spindle motor,an air channel which runs radially outside of the collet chuck,wherein the collet chuck has at least two clamping jaws which are configured for receiving and releasing a tool, and{'b': 42', '44', '46, 'wherein the air channel is configured as a sealing air channel () and forms a positive pressure chamber () at least partially above the clamping jaws ().'}2. The machine tool as claimed in claim 1 ,{'b': 44', '40', '40', '14', '12, 'wherein the positive pressure chamber () terminates in an annular gap () or wherein the annular gap () is arranged downstream of the positive pressure chamber having one gap side formed by the tool () or the tool spindle ().'}3. The machine tool as claimed in claim 1 ,{'b': 40', '44, 'wherein an annular gap () located downstream of the positive pressure chamber () has a gap size of between 0.03 mm and 0.5 mm.'}4. The machine tool as claimed in claim 1 ,{'b': 40', '44', '12, 'wherein an annular gap () located downstream of the positive pressure chamber () has an orientation coaxial to the tool axis or an orientation which deviates from the axis of the tool spindle () by +/−30°.'}5. The machine tool as claimed in claim 1 ,{'b': 14', '28', '30', '32, 'wherein the tool () has at least one annular flange (, , ) which protrudes radially to the outside, and'}{'b': 42', '30, 'wherein the sealing air channel () terminates at the annular flange ().'}6. The machine tool as claimed in claim 1 ...

MECHANICAL SEAL WITH SENSOR

A system and method for monitoring a dry gas seal positionable between a stationary housing and a rotatable shaft. A plurality of sense elements may rotate in response to the rotation of the rotatable shaft and a speed sensor may sense the speed of the rotatable shaft at speeds below one thousand rotations per minute based on sensing the plurality of sense elements. A processor may receive output signals from the speed sensor and may establish a position of the dry gas seal or an operating condition of the dry gas seal based on the signal from the speed sensor. 1. A seal monitoring system for a dry gas seal assembly , comprising:a dry gas seal having a stator portion with a first seal face and a rotor portion with a second seal face, the dry gas seal is configured to be positioned between a stationary housing and a rotatable shaft with the rotor portion configured to rotate with the rotatable shaft;a sense element configured to rotate with the rotatable shaft;a sensor sensing the sense element as the sense element rotates with the rotatable shaft, the sensor configured to output a signal based on the sensing of the sense element;a processor configured to receive the signal from the sensor; andwherein the processor is configured to determine an axial position of the rotor portion relative to the stator portion based on the signal output from the sensor.2. The seal monitoring system of claim 1 , wherein the processor is configured to determine the axial position of the rotor portion relative to the stator portion based on an amplitude of the signal output from the sensor.3. The seal monitoring system of claim 1 , wherein the signal output from the sensor includes one or more pulses and the processor is configured to determine the axial position of the rotor portion relative to the stator portion based on the one or more pulses in the signal output from the sensor.4. The seal monitoring system of claim 3 , further comprising:two or more sense elements, the two or more ...

Rapid Solid-State Foaming

Disclosed, among other things, are ways to manufacture reduced density thermoplastics using rapid solid-state foaming and machines useful for the saturation of plastic. In one embodiment, a foaming process may involve saturating a semi-crystalline polymer such as Polylactic Acid (PLA) with high levels of gas, and then heating, which may produce a reduced density plastic having high levels of crystallinity. In another embodiment, a foaming process may produce layered structures in reduced density plastics with or without integral skins. In another embodiment, a foaming process may produce deep draw structures in reduced density plastics with or without integral skins. In yet another embodiment, a foaming process may utilize additives, blends, or fillers, for example. In yet another embodiment, a foaming process may involve saturating a semi-crystalline polymer such as Polylactic Acid (PLA) with high levels of gas, and then heating, which may produce a reduced density plastic having high levels of crystallinity. 1. A method for rapid solid-state foaming of reduced density thermoplastics , comprising:saturating the thermoplastic at a first pressure and a first temperature for a first time of no longer than ten minutes; andheating the thermoplastic at a second pressure and a second temperature for a second time, the second temperature being higher than the first temperature, and the second pressure being lower than the first pressure.2. The method of claim 1 , wherein the thermoplastic is Polylactic Acid.3. The method of claim 1 , wherein the thermoplastic is Polylactic Acid combined with a filler.4. The method of claim 1 , wherein the first pressure is between 500 and 3000 pounds per square inch (PSI).5. The method of claim 1 , wherein the first time is at least thirty seconds.6. The method of claim 1 , wherein the second temperature is between 80° Celsius and 110° Celsius claim 1 , and the second time is between 15 seconds and 60 seconds.7. The method of claim 1 , in ...

SLIDING COMPONENTS

Low-torque sliding components have sliding surfaces rotated relative to each other with an annular mating ring and an annular seal ring facing each other. The sliding surface of at least one of the mating ring and the seal ring has therein a plurality of multi-stepped recess portions formed in a circumferential direction. Relative rotation and sliding of the mating ring and the seal ring causes the multi-stepped recess portions to generate a dynamic pressure, and the multi-stepped recess portion is formed in a stepwise shape in a cross-sectional view by a dynamic pressure recess portion and a static pressure recess portion with the dynamic pressure recess portion surrounding the static pressure recess portion deeper than the dynamic pressure recess portion. 1. A seal assembly , comprising an annular mating ring with a sliding surface and an annular sealing ring with a sliding surface , the sliding surfaces facing each other , being relatively rotatable with respect to each other , and being capable of sealing a sealed fluid present on one radial side of each sliding surface ,wherein the sliding surface of at least one of the mating ring and the seal ring has therein a plurality of multi-stepped recess portions arranged in a circumferential direction and relative rotation and sliding of the mating ring and the seal ring causes the multi-stepped recess portions to generate a dynamic pressure,wherein each of the multi-stepped recess portions is formed in a stepwise shape in a cross-sectional view by a dynamic pressure recess portion and a static pressure recess portion with the dynamic pressure recess portion surrounding the static pressure recess portion deeper than the dynamic pressure recess portion, andwherein the multi-stepped recess portions are disposed only on the one radial side of the sliding surface of the mating ring or the seal ring.2. The seal assembly according to claim 1 , wherein the dynamic pressure recess portion and the static pressure recess ...

SEALING DEVICE

A sealing device which allows the man-hour for mounting the sealing device to be reduced is provided. A sealing device includes: a slinger fitted and fixed to an end portion of an inner shaft; a core metal fitted and fixed to an end portion of an outer ring; an inner seal lip fixed to the core metal and in slidable contact with the slinger; an outer seal lip fixed to the core metal radially outward of the inner seal lip and in slidable contact with a side surface of a flange portion; and a labyrinth lip fixed to the core metal radially outward of the outer seal lip and forming a labyrinth seal together with the side surface of the flange portion. 1. A sealing device used in a rolling bearing apparatus which includes an inner shaft and an outer ring disposed so as to be concentric with each other and in which a flange portion having a side surface opposed to an end surface of the outer ring with a gap provided therebetween is integrally formed at an end portion of the inner shaft , the sealing device sealing an annular space between the inner shaft and the outer ring , the sealing device comprising:a slinger fitted and fixed to the end portion of the inner shaft and extending in a radially outward direction;a core metal fitted and fixed to an end portion of the outer ring;an inner seal lip fixed to the core metal and in slidable contact with the slinger;an outer seal lip fixed to the core metal radially outward of the inner seal lip and in slidable contact with the side surface of the flange portion; anda labyrinth lip fixed to the core metal radially outward of the outer seal lip, the labyrinth lip forming a labyrinth seal together with the side surface of the flange portion.2. The sealing device according to claim 1 , wherein the slinger includes: a cylindrical portion which is fitted and fixed to the end portion of the inner shaft; and an annular portion which extends in the radially outward direction from an end portion of the cylindrical portion and is disposed ...

SLIDE COMPONENT

In an embodiments, in a sealing face of at least one slide part of a pair of slide parts, a dynamic pressure generation groove is provided so as to be separated not to communicate with a sealed fluid side and a leakage side by land portions on both sealing faces, between an end on the leakage side of the dynamic pressure generation groove and the leakage side, a fluid introduction groove which communicates the dynamic pressure generation groove and the leakage side is provided, and the cross-sectional area of the fluid introduction groove is set smaller than the cross-sectional area of the dynamic pressure generation groove . The sealing faces are subjected to fluid lubrication and low friction in a steady operation, and leakage of the sealed fluid and entrance of dust into the sealing faces are suppressed. 1. A slide component comprising a pair of slide parts relatively sliding on each other , wherein one slide part is a stationary-side seal ring and the other slide part is a rotating-side seal ring , these seal rings have sealing faces formed radially for sealing a sealed fluid from leaking , in the sealing face of at least one slide part of the pair of slide parts , a dynamic pressure generation groove is provided so as to be separated not to communicate with a sealed fluid side and a leakage side by land portions on both sealing faces , between an end on the leakage side of the dynamic pressure generation groove and the leakage side , a fluid introduction groove which communicates the dynamic pressure generation groove and the leakage side is provided , and the cross-sectional area of the fluid introduction groove is set smaller than the cross-sectional area of the dynamic pressure generation groove.2. A slide component comprising a pair of slide parts relatively sliding on each other , wherein one slide part is a stationary-side seal ring and the other slide part is a rotating-side seal ring , these seal rings have sealing faces formed radially for sealing a ...

SLIDING COMPONENT

In an embodiment, a sliding component includes a pair of sliding parts (a stationary-side seal ring and a rotating-side seal ring ) that relatively slide on each other and each have a sliding face S formed radially for sealing sealed fluid from leaking. The sliding face S of at least one sliding part is provided with dynamic pressure generation grooves spaced in a non-communicating manner from the sealed-fluid side and the leakage side by lands R of both sliding faces, and is provided with fluid introduction holes between leakage-side ends of the grooves and the leakage side, for communicating the grooves and the leakage side. Each fluid introduction holes is configured such that a dynamic-pressure-generation-groove-side opening open to a corresponding one of the grooves is axially displaced from a leakage-side opening open to the leakage side. 1. A sliding component comprising a pair of sliding parts that relatively slide on each other , one of the sliding parts being a stationary-side seal ring , the other of the sliding parts being a rotating-side seal ring , the seal rings each having a sliding face formed radially for sealing sealed fluid from leaking , whereinthe sliding face of at least one sliding part of the pair of sliding parts is provided with dynamic pressure generation grooves spaced in a non-communicating manner from a sealed-fluid side and a leakage side by lands of both sliding faces, and is provided with fluid introduction holes between leakage-side ends of the dynamic pressure generation grooves and the leakage side, for communicating the dynamic pressure generation grooves and the leakage side, andeach of the fluid introduction holes is configured such that a dynamic-pressure-generation-groove-side opening thereof open to a corresponding one of the dynamic pressure generation grooves is axially displaced from a leakage-side opening thereof open to the leakage side.2. A sliding component comprising a pair of sliding parts that relatively slide on ...

GAS-CURTAIN PROTECTION DEVICE FOR AEROSPACE PRECISION MACHINING SPINDLE

A gas-curtain protection device for an aerospace precision machining spindle includes a spindle body, a shaft, a first labyrinth ring, a gas guide ring and a bulkhead ring. The first labyrinth ring and the gas guide ring are mounted around the front end of the spindle body, and the bulkhead ring is mounted around the shaft. The first labyrinth ring has a gas pipe, and the gas guide ring has a gas tank communicated with the gas pipe. The bulkhead ring has a gas guide structure communicated with the gas tank. In use, gas is delivered from the spindle body to the gas tank through the gas pipe, and then guided to the exterior of the spindle body by the gas guide structure so as to form a gas curtain that effectively prevents cutting fluid and chips from entering the interior of the spindle body. 1. A gas-curtain protection device for an aerospace precision machining spindle comprising:a spindle body, being provided with a rotatable shaft and having a front end and a rear end that are opposite to each other;a first labyrinth ring, being mounted around the front end of the spindle body and including a gas pipe;a gas guide ring, being mounted around the front end of the spindle body and adjacent to the first labyrinth ring, and having its lateral facing the rear end circularly formed with a gas tank that is communicated with the gas pipe; anda bulkhead ring, being mounted around the shaft, close to the front end, and adjacent to the gas guide ring, wherein a gas guide structure communicated with the gas tank is formed between the bulkhead ring and the gas guide ring, whereby a gas delivered from the spindle body to the gas tank through the gas pipe is guided by the gas guide structure to the exterior of the spindle body to from a gas curtain.2. The gas-curtain protection device of claim 1 , wherein a first gas passage is formed between a lateral of the gas guide ring that faces the rear end and the first labyrinth ring claim 1 , in which the first gas passage is ...

Lubricating Shaft Seal Assembly

A shaft seal assembly is configured for sealing, for example, a reciprocating axial-movement shaft. The shaft seal assembly includes an annular elastomeric seal body having at least one first sealing surface configured to sealing engage a shaft. A lubricant reservoir body includes a second sealing surface and comprises a polymer matrix having a porous structure containing micro-pores, wherein the micro-pores are filled with lubricating oil. 1. A shaft seal assembly comprising:a first annular elastomeric seal body having at least one first sealing surface configured to sealing engage a shaft; anda lubricant reservoir body having a second sealing surface, wherein the lubricant reservoir body comprises a polymer material saturated with a lubricant, and wherein the lubricant reservoir body is configured to store and dispense the lubricant through the second sealing surface to lubricate the at least one first sealing surface and the shaft.2. The shaft seal assembly of claim 1 , wherein the lubricant is a lubricating oil.3. The shaft seal assembly of claim 2 , wherein the polymer material is a polymer matrix having a porous structure containing micro-pores claim 2 , wherein the micro-pores are filled with the lubricating oil.4. The shaft seal assembly of claim 1 , wherein the lubricant reservoir body is configured to be disposed between at least a portion of the first annular elastomeric seal body and the shaft5. The shaft seal assembly of claim 1 , wherein the at least one first sealing surface comprises a first sealing lip and a second sealing lip axially spaced from the first sealing lip.6. The shaft seal assembly of claim 5 , wherein the lubricant reservoir body is disposed axially between the first sealing lip and the second sealing lip.7. The shaft seal assembly of claim 5 , further comprising an annular pocket disposed between the first sealing lip and the second sealing lip on the radially inward side of the first annular elastomeric seal body claim 5 , wherein ...

SLIDING PARTS

Sliding parts are provided where a plurality of dynamic pressure-generating grooves for generating dynamic pressure via the relative rotational sliding of the stationary ring and the rotating ring are formed in a circumferential direction on a sealing face of one of a stationary ring and the rotating ring so as to communicate with a sealed fluid-containing space, and pumping areas for generating pumping action via the relative rotational sliding of the stationary ring and the rotating ring are formed within the dynamic pressure-generating grooves. 1. Sliding parts for allowing opposing sealing faces of an annular stationary ring fixed on a fixed side and an annular rotating ring that rotates along with a rotating shaft to rotate relative to one another , thereby sealing a sealed fluid present on one side in the radial direction of said relatively rotational sealing faces; the sliding parts being characterized in:a plurality of dynamic pressure-generating grooves for generating dynamic pressure via the relative rotational sliding of the stationary ring and the rotating ring being formed in the circumferential direction on the sealing face of one of the stationary ring and the rotating ring so as to communicate with the sealed fluid-containing space; andpumping areas for generating pumping action via the relative rotational sliding of the stationary ring and the rotating ring being formed within the dynamic pressure-generating grooves.2. The sliding parts according to claim 1 , characterized in the pumping areas being provided with intake pumping areas operating in a direction taking in the sealed fluid and outflow pumping areas operating in a direction in which the sealed fluid is expelled.3. The sliding parts according to claim 1 , characterized in said pumping areas having periodic linear indentation structures claim 1 , said linear indentations being formed so that the direction of the indentations is inclined at a predetermined angle with respect to the sliding ...

Shaft seal assembly

An illustrative embodiment of a shaft seal assembly generally includes a fixed stator, a floating stator, and a sealing member. In the illustrative embodiment the fixed stator may be formed with one or more fluid conduits that are in fluid communication with one or fluid conduits formed in the floating stator. The fluid conduits in the floating stator may be in fluid communication with one or more fluid conduits formed in a sealing member. A rotational interface may exist between the sealing member and a shaft, and the various fluid conduits may be configured to create a fluid barrier at that interface. Other embodiments of a shaft seal assembly may create a fluid barrier at a rotational interface between a rotor and a floating stator. 1. A method of creating a pressurized fluid barrier between a shaft and a sealing member at an interface therebetween , said method comprising the steps of: i. an annular recess along a portion of a radial-interior surface of said fixed stator, wherein said annular recess includes first and second radially oriented surfaces and a circumferential axially oriented surface;', 'ii. an inlet extending from a radial-exterior surface of said fixed stator to said annular recess in a generally radial direction, wherein said fixed stator is engaged with a housing at an aperture of said housing, wherein a shaft rotatable with respect to said housing extends outward from said aperture;, 'a. engaging a fixed stator with a housing, wherein said shaft protrudes from and is rotatable with respect to said housing, and wherein said fixed stator comprises i. a floating stator having a radial-interior surface that is substantially concave in shape, wherein a pin recess is formed in said floating stator and extends from said radial-exterior surface of said shaft sealing member to said radial-interior surface of said floating stator;', 'ii. a sealing member, wherein said sealing member includes a radial-exterior surface with a substantially convex shape ...

METHODS AND SYSTEMS FOR SEALING ROTATING EQUIPMENT SUCH AS EXPANDERS OR COMPRESSORS

A method and system is provided for pressure balancing one or more seals in machines such as expanders and/or compressors using the process fluid which is being expanded or compressed to provide the pressure for pressure balancing the other side of the one or more seals. The one or more seals may be part of a pressure containing chamber which may comprise a seal, a bearing and/or a gear on a rotating shaft common to the seal. An amount of pressure to be supplied to housing(s) for a machine so as to create a pressure cascade, and thereby dropping the pressure in each subsequent chamber as pressure approaches atmosphere. Pressure differentials may be directed to leak process fluid to the chamber into the process. Pressurized lube oil systems may be employed for balancing pressure and delivering lubricant to the seals, bearings and gears. 1. A system for balancing pressure , comprising:a machine, configured to handle process fluid, the machine comprising a high pressure process pipe and a low pressure process pipe;a first pressure chamber, operatively coupled to one portion of the machine, wherein the first pressure chamber is configured to be pressurized from the process fluid, the first pressure chamber comprising a first chamber seal; anda second pressure chamber, operatively coupled to another portion of the machine, wherein the second pressure chamber is configured to be pressurized from the process fluid, the second pressure chamber comprising a plurality of second chamber seals;wherein the system is configured to provide process fluid to at least one of the first pressure chamber and second pressure chamber to balance pressure in one of (i) at least one of the first chamber and the second chamber, and (ii) a volume between each of the plurality of second chamber seals.2. The system of claim 1 , further comprising at least one first pressure balancing line coupled to the high pressure process pipe claim 1 , wherein the first pressure balancing line is coupled to ...

FLOATING RING SEAL

The invention relates to a floating ring seal for sealing on a rotating component, comprising a one-piece body () including a first throttling surface () directed radially inward, a second throttling surface () directed radially inward, and a first circumferential groove () on the inner circumference of the one-piece body (), the first groove () being located between the first throttling area () and the second throttling area () in the axial direction (X-X) of the floating ring seal. 1. A floating ring seal for sealing on a rotating component , comprising:a one-piece body includinga first throttling area directed radially inward,a second throttling area directed radially inward, anda first circumferential groove on the inner circumference of the one-piece body,wherein the first groove is arranged between the first throttling area and the second throttling area in the axial direction of the floating ring seal.2. The floating ring seal according to claim 1 , wherein a first width of the first throttling area is smaller than or equal to a second width of the second throttling area.3. The floating ring seal according to claim 2 , wherein the first groove has a groove width which is smaller than or equal to the first width and which is smaller than or equal to the second width.4. The floating ring seal according to claim 1 , wherein the one-piece body further comprises a third throttling area directed radially inward wherein a second groove is located in the axial direction of the floating ring seal between the third throttling area and the second throttling area.5. The floating ring seal according to claim 1 , wherein the one-piece body is made of a material comprising carbon.6. The floating ring seal according to claim 1 , further comprising a seal ring carrier carrying the one-piece body.7. The floating ring seal according to claim 6 , wherein the seal ring carrier is located on a side of the one-piece body opposite the throttling areas.8. The floating ring seal ...

SLEEVE CONFIGURED FOR USE IN A NON-CONTACTING GAS SEAL AND GAS SEAL INCLUDING THE SLEEVE

A sleeve mountable on a rotatable shaft and configured to form a non-contacting seal with a seal ring surrounding and radially spaced from the sleeve, the sleeve including a radially inner surface configured to be mounted on the rotatable shaft, a radially outer surface, an axially inner surface between the radially inner surface and the radially outer surface, an axially outer surface between the radially inner surface and the radially outer surface and a bore configured to provide fluid communication between gas at the axially inner surface of the sleeve and the radially outer surface of the sleeve. 1. A sleeve mountable on a rotatable shaft and configured to form a non-contacting seal with a seal ring surrounding and radially spaced from the sleeve , the sleeve comprising:a radially inner surface configured to be mounted on the rotatable shaft;a radially outer surface;an axially inner surface between the radially inner surface and the radially outer surface;an axially outer surface between the radially inner surface and the radially outer surface; anda bore configured to provide fluid communication between gas at the axially inner surface of the sleeve and the radially outer surface of the sleeve.2. The sleeve of claim 1 , wherein the bore extends from the axially inner surface to the radially outer surface.3. The sleeve according to claim 2 , wherein the bore has a first end and a second end claim 2 , the second end being axially claim 2 , radially and circumferentially offset from the first end.4. The sleeve of claim 2 , wherein the bore tapers in a direction from the axially inner surface to the radially outer surface.5. The sleeve according to claim 4 , wherein the bore has a first end and a second end claim 4 , the second end being axially claim 4 , radially and circumferentially offset from the first end.6. The sleeve of claim 2 , wherein the bore is linear.7. The sleeve of claim 2 , wherein the radially outer surface includes a circumferential groove and ...

CONNECTOR FOR TRANSFERRING AT LEAST ONE FLUID

A connector () for transferring a fluid or for applying a pneumatic pressure from an inlet conduit () to an outlet conduit () that may rotate with respect to the inlet conduit (), in which the connector () comprises a rotating shaft () defining the outlet conduit () therein, which has an inlet opening (), said rotating shaft () defining a rotational axis (S-S) and comprising a sealing disc () extending radially from said rotating shaft; an insertion chamber () to which said inlet conduit () is sealingly securable, said chamber leading towards said inlet opening () of the outlet conduit (); at least one first cylinder-piston unit () comprising a cylinder () and a piston () slidable in said cylinder (), said piston () having a sealing surface () facing the sealing disc (), and said cylinder () being fluidically connected or connectable to said insertion chamber (); said piston () being configured to be selectively actuated between a sealing position in which the sealing surface () is at a minimum distance or in contact with the sealing disc (), in which a fluidic seal is carried out between said insertion chamber () and said inlet opening () of the outlet conduit () of the rotating shaft (), and a non-sealing position in which the sealing surface () is moved away from the sealing disc (), in which a fluidic seal is absent between said insertion chamber () and said inlet opening () of the rotating shaft of the outlet conduit () of the rotating shaft (). 1. A connector for transferring at least one fluid , orfor applying a pneumatic pressure, from an inlet conduit to an outlet conduit that may rotate with respect to the inlet conduit, in which the connector comprises:a rotating shaft defining the outlet conduit therein, which has an inlet opening, said rotating shaft defining a rotation axis and comprising a sealing disc extending radially from said rotating shaft;an insertion chamber to which said inlet conduit is sealingly securable, said chamber leading to said inlet ...

GAS CYLINDER, IN PARTICULAR HIGH-PRESSURE GAS CYLINDER

The invention relates to a gas cylinder, in particular a high-pressure gas cylinder, the cylinder tube () of which has a piston rod () that is passed through a sealing arrangement () by which the gas pressure prevailing in the pressure chamber () of the cylinder tube () is sealed off against the ambient pressure. The invention is characterised in that the scaling arrangement () has a compressed oil chamber () between at least one sealing element () adjacent to the pressure chamber () and at least one more sealing element further away from the pressure chamber (), into which oil chamber oil can be pressed in by means of a supply device () at a pressure that is equal to or higher than the respective gas pressure prevailing in the pressure chamber () of the cylinder tube (). 11913172311333311723351723375117231. A gas cylinder , in particular high-pressure gas cylinder , the cylinder tube of which () has a piston rod () that is passed through a sealing arrangement () , which seals the gas pressure prevailing in the pressure chamber ( , ) of the cylinder tube () against the ambient pressure , characterized in that the sealing arrangement () has a pressurized oil chamber () between at least one sealing element () adjacent to the pressure chamber ( , ) and at least one additional sealing element () further away from the pressure chamber ( , ) , into which compressed oil can be compressed by means of a supply device ( , ) at a pressure that is equal to or higher than the respective gas pressure prevailing in the pressure chamber ( , ) of the cylinder tube ().29191. The gas cylinder according to claim 1 , characterized in that the piston rod () has a movable sliding element () in the cylinder tube ().331351333. The gas cylinder according to claim 1 , characterized in that the sealing elements ( claim 1 , ) of the sealing arrangement () and the pressurized oil chamber () located between these sealing elements are disposed in a fixed positional relationship to one another. ...

Sealing arrangement of a steam turbine in which a sealing liquid and a vapor steam extraction system are used

A sealing arrangement for a duct, through a stationary housing, of a shaft which rotates about an axis is provided, wherein a sealing liquid is used for sealing instead of sealing steam. The sealing arrangement includes a seal, having a vapor steam extraction system, and a feed line, which is arranged between the inner space and the vapor steam extraction system and is designed for supplying a sealing liquid, wherein a labyrinth seal, a brush seal with metallic bristles, a brush seal with bristles made of natural fibers and/or a brush seal made of synthetic fibers is provided for sealing off with respect to the inner space and the vapor steam extraction system.

BIDIRECTIONAL LIFT-OFF CIRCUMFERENTIAL SHAFT SEAL SEGMENT AND A SHAFT SEAL INCLUDING A PLURALITY OF THE SEGMENTS

A circumferential shaft seal segment includes a radial outer face, a radially inner face, a first axial face extending from the radial outer face to the radial inner face and a second axial face axially spaced from the first axial face and extending from the radially outer face to the radially inner face. The seal has a bleed slot in the radially inner face extending from the first axial face toward the second axial face, and there are first and second recesses in the radially inner face in communication with the bleed slot that extend from circumferentially opposite sides of the bleed slot. 1. A circumferential shaft seal segment comprising:a radial outer face;a radially inner face;a first axial face extending from the radial outer face to the radial inner face; anda second axial face axially spaced from the first axial face and extending from the radially outer face to the radially inner face,a bleed slot in the radially inner face extending from the first axial face toward the second axial face; andfirst and second recesses in the radially inner face in communication with the bleed slot and extending from the bleed slot in opposite circumferential directions.2. The circumferential shaft seal segment of claim 1 , wherein the bleed slot is axially disposed in the radially inner face.3. The circumferential shaft seal segment of claim 2 , wherein the first recess has a first end at the bleed slot and a second end circumferentially spaced from the bleed slot claim 2 , and a first depth at the first end and a second depth at the second end claim 2 , and wherein the first depth is greater than the second depth.4. The circumferential shaft seal segment of claim 3 , wherein the second recess has a first end at the bleed slot and a second end circumferentially spaced from the bleed slot claim 3 , and a first depth at the first end of the second recess and a second depth at the second end of the second recess claim 3 , and wherein the first depth of the second recess is ...

SLIDING COMPONENT

A sliding component has a plurality of dimples provided independently in a circumferential direction on one sealing face of a pair of sliding components relatively sliding to each other. A cavitation formation region on an upstream side of each dimple is disposed closer to a low-pressure fluid side and a positive pressure generation region on a downstream side of each dimple is disposed closer to a high-pressure fluid side, and an edge on the low-pressure fluid side of the positive pressure generation region is formed into a tapered shape inclined with respect to the rotating direction of the other sealing face toward the high-pressure fluid side from the low-pressure fluid side and is smoothly connected to an edge on the low-pressure fluid side of the cavitation formation region. 1. A sliding component wherein:a plurality of dimples are provided independently in the circumferential direction on one sealing face of a pair of sliding components relatively sliding to each other, a cavitation formation region on an upstream side of each dimple is disposed closer to a low-pressure fluid side and a positive pressure generation region on a downstream side of each dimple is disposed closer to a high-pressure fluid side, and an edge on the low-pressure fluid side of the positive pressure generation region is formed into a tapered shape inclined with respect to the rotating direction of the other sealing face toward the high-pressure fluid side from the low-pressure fluid side and is smoothly connected to an edge on the low-pressure fluid side of the cavitation formation region.2. The sliding component as set forth in claim 1 , wherein:a starting end on the upstream side of the cavitation formation region is formed into a tapered shape inclined with respect to the rotating direction of the other sealing face of the pair of sliding components toward the high-pressure fluid side from the low-pressure fluid side, and is arranged so as to overlap in a radial direction with the ...

FLOATING HIGH VACUUM SEAL CARTRIDGE

An apparatus that uses a combination of mechanical contact bearings and air bearings is disclosed. The apparatus includes a fixed seal housing, attached to a process chamber and a floating seal cartridge, which is disposed in proximity to the fixed seal housing. A shaft is disposed with an aperture in the process chamber, the central opening in the fixed seal housing and the second central opening in the floating seal cartridge. A first air bearing is created between the shaft and the floating seal cartridge in the second central opening. A second air bearing is created between the floating seal cartridge and the fixed seal housing. In this way, the floating seal cartridge is free to move with the shaft radially, while still maintaining a seal between the process chamber and the external environment.

CONTACTLESS LABYRINTH SEAL OBTAINED BY ADDITIVE MANUFACTURING

A contactless seal intended for being fitted in a wall and a shaft passing through an opening of the wall, the seal comprising a rotary member intended for being supported by the shaft and a stationary member intended for being supported by the opening, the stationary member being inserted around the rotary member while being rotatably movable relative to same, the rotary member having an outer surface provided with at least one circumferential rib and the stationary member having an inner surface provided with at least one groove, or vice-versa. Each rib is partially inserted into a corresponding groove in order to form a labyrinthine leak path. The rotary member and the stationary member are each made up of a single part, and the rotary member and/or the stationary member are obtained by additive manufacturing. 112341627367689912141499141412786166767acacacac. Contactless seal () for a rotating shaft () passing through an opening () of a wall () , this seal () comprising a rotating member () intended to be carried by the shaft () and a fixed member () intended to be carried by the opening () of the wall , the rotating member () being slotted into the fixed member () while being mobile in rotation with respect to it , the rotating member () having an outer face () provided with at least one circumferential ridge (-) and the fixed member having an inner face () provided with at least one recess (-) or vice versa , each ridge (-) being partially engaged in a corresponding recess (-) such that the inner face () of the fixed member () and the outer face () of the rotating member () jointly delimit a labyrinthine leak route () , characterised in that the rotating member () and the fixed member () are each formed from one single part , and in that the rotating member () and/or the fixed member () is obtained by additive manufacturing.26211616. Seal according to claim 1 , wherein the rotating seal () comprises claim 1 , at one of the ends thereof claim 1 , a ventilation ...

Circumferential Seal Assembly with Multi-Axis Stepped Grooves

A circumferential seal assembly suitable for forming a thin film between a rotatable runner and a sealing ring is presented. The assembly includes an annular seal housing, a rotatable runner, an annular seal ring, and a plurality of groove structures. Each groove structure includes a groove and an optional feed groove. The groove includes at least two adjoining steps defined by base walls arranged to decrease depthwise. Two adjoining base walls are disposed about a base shoulder. Each base shoulder locally redirects a longitudinal flow to form an outward radial flow in the direction of the annular seal ring. The base walls are bounded by and intersect a pair of side walls. A side wall includes at least one side shoulder which narrows the groove widthwise and locally redirects the longitudinal flow to form a lateral flow in the direction of the other side wall. Outward and lateral flows separately or in combination enhance stiffness of a thin-film layer between the annular seal ring and the rotatable runner. 1. A circumferential seal assembly comprising:(a) an annular seal housing disposed between a pair of compartments;(b) a rotatable runner;(c) an annular seal ring disposed within said annular seal housing and disposed about said rotatable runner; and each said groove includes at least two adjoining steps whereby each said step defined by a base wall, said base walls arranged along said groove to decrease depthwise in direction opposite to rotation of said rotatable runner, two adjoining said base walls disposed about a base shoulder, each said base shoulder locally redirects said longitudinal flow to form an outward radial flow in direction of said annular seal ring,', 'said base walls bounded by and intersecting a pair of side walls, each said side wall includes at least one side shoulder which narrows said groove widthwise and locally redirects said longitudinal flow away from said side wall to form a lateral flow in direction of another said side wall., '(d) a ...

Composite dynamic seal mating ring or rotor

A hydrodynamic mating ring includes a base and an insert coupled to the base. In embodiments, an insert has a coefficient of thermal expansion greater than the coefficient of thermal expansion of the base. A hydrodynamic seal assembly including a corresponding stator is also disclosed.

ASPIRATING FACE SEAL ASSEMBLY FOR A ROTARY MACHINE

A seal assembly for a rotary machine is positioned between a rotating component and a stationary component of the rotary machine. The seal assembly includes a seal bearing face that opposes the rotating component and a slide device. The slide device is positioned between different fluid pressure volumes in the rotary machine. The slide device axially moves toward the rotating component responsive to pressurization of the rotary machine. The slide device includes cross-over ports and the seal bearing face includes feed ports. The feed ports extend through the seal bearing face to form an aerostatic portion of a film bearing between the seal bearing face and the rotating component. The seal bearing face and/or the rotating component is a non-planar surface that, during rotating motion of the rotating component, forms an aerodynamic portion of the film bearing between the seal bearing face and the rotating component. 1. A seal assembly for a rotary machine , the seal assembly configured to be positioned between a rotating component and a stationary component of the rotary machine , the seal assembly comprising:a seal bearing having a face that opposes the rotating component of the rotary machine; anda slide device coupled with the seal bearing, the slide device configured to be positioned between a first fluid pressure volume in the rotary machine and a different, second fluid pressure volume in the rotary machine, the slide device configured to axially move parallel to a rotation axis of the rotary machine and toward the rotating component of the rotary machine responsive to pressurization of the rotary machine,wherein the slide device includes one or more cross-over ports and the seal bearing includes one or more feed ports,wherein the one or more feed ports extend through the face of the seal bearing to form one or more aerostatic portions of a film bearing between the face of the seal bearing and the rotating component of the rotary machine, andwherein the face of ...

ASPIRATING FACE SEAL ASSEMBLY FOR A ROTARY MACHINE

A seal assembly for a rotary machine includes a seal bearing face that opposes a rotating component of the machine and a slide device coupled with the seal bearing face. The slide device axially moves toward the rotating component responsive to pressurization of the rotary machine. The slide device includes cross-over ports and the seal bearing includes feed ports. The feed ports extend through the seal bearing face to form aerostatic portions of a film bearing between the seal bearing face and the rotating component. The seal bearing face and/or the rotating component has a non-planar surface that, during rotating motion of the rotating component relative to the face of the seal bearing face, forms aerodynamic portions of the film bearing. 1. A rotary machine comprising:a rotating component configured to rotate around a rotation axis relative to a stationary component; andan aspirating seal assembly disposed between the rotating component and the stationary component, the seal assembly having a slide device coupled with a seal bearing, the slide device configured to create a pressure drop between (a) a first fluid pressure volume that is radially outside of the slide device and the rotating component and (b) a different, second fluid pressure volume that is radially inside the slide device between the slide device and the rotating component along one or more radial directions, the slide device configured to axially move the seal bearing toward an annular surface of the rotating component and to form a film bearing between the seal bearing and the annular surface of the rotating component responsive to pressurization of the rotary machine,wherein one or more of the slide device or the rotating component include one or more starter teeth, the one or more starter teeth configured to restrict a fluid leakage path extending between the first fluid pressure volume and the second fluid pressure volume and extending between the slide device and the rotating component, the ...

Circumferential Back-to-Back Seal Assembly with Bifurcated Flow

A circumferential seal assembly capable of separating a gas into two separate flow paths before communication between a rotatable runner and a pair of seal rings is presented. The seal assembly includes an annular seal housing, a pair of annular seal rings, a rotatable runner, and a plurality of groove structures. The seal housing is interposed between a pair of compartments. The seal rings are separately disposed within the seal housing and separately disposed around the rotatable runner. The groove structures are disposed along an outer annular surface of the rotatable runner. A gas is communicable onto the groove structures. Each groove structure includes at least two hydrodynamic grooves that separate and communicate the gas onto the seal rings. Each groove includes steps whereby the depth of at least one adjoining step decreases in the direction opposite to rotation with or without the depth of another adjoining steps increasing in the direction opposite to rotation. Each groove is also tapered widthwise.

A METHOD OF FEEDING A SEALING MEDIUM INTO A LIQUOR FILTER AND A LIQUOR FILTER

A method and a liquor filter, in which liquor filter sealing medium is fed via a sealing medium channel () into an innermost sealing zone formed by an innermost sealing member (), an outer seal () and the space between them at a causticizing plant of a chemical pulp mill. The sealing medium used is an alkaline sealing liquid and/or gas, which does not substantially dilute the liquor being filtered. Advantageously the sealing medium is filtrate from the liquor filter and/or gas taken from the interior of the liquor filter. 1. A method of feeding a sealing medium into a sealing arrangement of a liquor filter in a causticizing plant of a chemical pulp mill , which arrangement seals a shaft of the filter and which sealing arrangement comprises a sealing sleeve provided with an innermost sealing zone formed by an innermost sealing member and an outer sealing member , a space between them , whereto a first sealing medium channel is led for feeding a sealing medium , wherein the sealing medium utilized is an alkaline liquid , a gas or a mixture thereof , and the alkaline liquid or gas does not substantially dilute the alkali-content of the liquor being filtered and leakage of the alkali-containing sealing liquid and/or gas out of the liquor filter is prevented by an outermost pair of seals formed of an outermost seal and an outer seal.2. The method according to claim 1 , wherein the liquor-containing sealing liquid that is used is filtrate produced by said liquor filter or group of filters in question.3. The method according to claim 1 , wherein the sealing medium in the innermost sealing zone is gas obtained from the interior of the liquor filter.4. The method according to claim 1 , wherein filtrate produced by the liquor filter or group of filters and/or gas taken from inside the liquor filter is cleaned to remove impurities before feeding the filtrate to the innermost sealing zone.5. The method according to claim 1 , wherein water is admixed into the sealing medium or ...

Double mechanical seal for centrifugal pump

A double mechanical seal assembly for sealing around the shaft of a centrifugal pump, a shaft sleeve that surrounds a portion of the shaft, and has an inner surface with a notch, the notch corresponding to a key on the shaft that engages the notch to transmit torque from the shaft to the shaft sleeve, an annular seal sleeve that surrounds the shaft sleeve and is engaged with the shaft sleeve, and rotating inboard outboard seals, each having a rotating seal face and operably associated. The seal assembly also includes stationary inboard and outboard seals each having a stationary seal face, the stationary seal face of the stationary inboard seal sealingly engaged with the rotating seal face of the rotating inboard seal and the stationary seal face of the stationary outboard seal sealingly engaged with the rotating seal face of the rotating outboard seal.

AEROSOL-BASED BEARING ISOLATOR FOR ATTACHMENT HEAD OF MACHINE TOOL

An aerosol-based bearing isolator for an attachment head includes a sealing element having an axial hole centrally and having a compressed air path and a plurality of compressed air export channels, with the compressed air path disposed on an outer circumferential surface of the sealing element, and the compressed air export channels each having an end exposed from the compressed air path and thus being in communication with the compressed air path and an outside; and a compressed air guiding element having a compressed air import hole with an end exposed from an inner lateral surface of the compressed air guiding element to form an opening thereon, wherein the inner lateral surface of the compressed air guiding element abuts against the outer circumferential surface of the sealing element, thereby allowing the compressed air import hole to be in communication with the compressed air path. 1. An aerosol-based bearing isolator for an attachment head of a machine tool , comprising:a compressed air guiding element having an annular shape and provided with a compressed air import hole, wherein the compressed air import hole has one end formed on an outer lateral surface of the compressed air guiding element, and has another end formed on an inner lateral surface of the compressed air guiding element; anda sealing element being annular-shaped and having a central axial hole, wherein the sealing element is disposed in a hollow annular center of the compressed air guiding element, so that the inner lateral surface of the compressed air guiding element is abutted against an outer circumferential surface of the sealing element in an airtight manner, the sealing element has a compressed air path and a plurality of compressed air export channels, wherein the compressed air path is disposed on the outer circumferential surface of the sealing element, the compressed air export channels are disposed in the compressed air path and each have an end connected to the compressed air ...

SEALING STRUCTURE

A sealing structure includes: a first member having a first surface extending along a gravity direction in which gravity acts; a second member having a second surface facing the first surface and extending along the gravity direction; a hydrostatic bearing that is arranged on the first surface of the first member and is configured to supply a compressed liquid between the first surface and the second surface; and a seal portion having a clearance that is formed between the first surface and the second surface and is provided below the hydrostatic bearing in the gravity direction. A liquid is retained in the clearance by surface tension. 1. A sealing structure , comprising:a first member having a first surface extending along a gravity direction in which gravity acts;a second member having a second surface that faces the first surface and extends along the gravity direction;a hydrostatic bearing that is arranged on the first surface of the first member and is configured to supply a compressed liquid between the first surface and the second surface; anda seal portion having a clearance that is formed between the first surface and the second surface and is provided below the hydrostatic bearing in the gravity direction, wherein a liquid is retained in the clearance by surface tension.2. The sealing structure according to claim 1 , wherein the clearance of the seal portion is set so as to retain the liquid in the clearance even when the compressed liquid stagnates on the liquid held in the clearance.3. The sealing structure according to claim 1 , wherein the first member has a discharge port arranged above the seal portion in the gravity direction claim 1 , and the compressed liquid supplied between the first surface and the second surface flows into the discharge port.4. The sealing structure according to claim 1 , wherein the clearance is formed by the first member and the second member.5. The sealing structure according to claim 1 , wherein the clearance has a size ...

FLUID-CUSHION SEALING DEVICE

The fluid-cushion sealing device () for a piston () moving in a cylinder () and defining with the latter a chamber to be sealed () includes: a continuous perforated ring () through the radial thickness of which passes a calibrated opening () and which is sealingly accommodated in a ring groove () provided in the piston () so as to define, with said groove (), a pressure distribution chamber () connected to a pressurized fluid source (), while an axially blind counter-pressure recess () is provided recessed on an external cylindrical ring surface () which faces the cylinder () and which the continuous perforated ring () comprises, the calibrated opening () leading into said recess (). 1. A fluid-cushion sealing device for a piston , wherein: at least one continuous perforated ring which comprises an internal cylindrical ring surface, an external cylindrical ring surface, and two axial ring surfaces, said ring being configured to be accommodated in at least one ring groove provided in the piston or in the cylinder, while said ring is capable of moving radially in the ring groove without being able to leave the ring groove, said continuous perforated ring being sufficiently flexible to allow the diameter of the continuous perforated ring to increase or decrease relative to said groove under an effect of a pressure of a source of pressurized fluid;', 'a ring seal that produces a seal between each axial ring surface and the ring groove, so that the ring groove defines, with the continuous perforated ring, a pressure distribution chamber connected by a transfer circuit to a pressurized fluid source;', 'at least one calibrated opening which passes right through the continuous perforated ring in its radial thickness;', 'at least one fluid-cushion carrying surface which the continuous perforated ring comprises, said carrying surface being arranged on the opposite side from the pressure distribution chamber., 'said sealing device is configured to move in longitudinal ...

SLIDING COMPONENT

A positive pressure generating mechanism comprising a positive pressure generating groove is provided to a high-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components, and a negative pressure generating mechanism comprising a negative pressure generating groove is provided to a low-pressure side. The positive pressure generating groove and negative pressure generating groove are communicated with a high-pressure fluid side and separated from a low-pressure fluid side by a seal surface. 1. A sliding component characterized in that a negative pressure generating mechanism comprising a negative pressure generating groove is provided to a low-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components , the negative pressure generating groove being communicated with a high-pressure fluid side and separated from a low-pressure fluid side by a seal surface.2. A sliding component characterized in that a positive pressure generating mechanism comprising a positive pressure generating groove is provided to a high-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components , and a negative pressure generating mechanism comprising a negative pressure generating groove is provided to a low-pressure side , said positive pressure generating groove and negative pressure generating groove being communicated with a high-pressure fluid side and separated from a low-pressure fluid side by a seal surface.3. A sliding component according to claim 2 , characterized in that said negative pressure generating groove is provided to a low-pressure side of the other sliding surface.4. A sliding component characterized in that an external peripheral side of a pair of sliding components is a high-pressure fluid side and an internal peripheral side is a low-pressure fluid side claim 2 , a positive pressure generating mechanism comprising a ...

SHAFT SEAL ARRANGEMENT

A shaft seal arrangement with a shaft extending along an axis and with a stator, wherein a rotating sealing ring is arranged on the shaft and a static sealing ring is arranged on the stator, wherein the rotating sealing ring has a rotating sealing surface and the stationary sealing ring has a stationary sealing surface, wherein these sealing surfaces are arranged in such a way that they are located opposite one another in a sealing manner in a substantially radial sealing plane, wherein the shaft seal arrangement is designed as a contactless gas seal, wherein at least one of the sealing surfaces has a nonrotationally symmetrical surface contouring the rotating sealing ring is provided. 1. A shaft seal arrangement comprising:a shaft extending along an axis and a stator, wherein a rotating sealing ring is arranged on the shaft and a static sealing ring is arranged on the stator, wherein the rotating sealing ring has a rotating axial sealing surface and the stationary sealing ring has a stationary axial sealing surface, wherein the rotating axial sealing surfaces and the stationary axial sealing surface are arranged in such a way that they are oppositely disposed with a sealing effect in an essentially axial sealing plane, wherein a shaft seal arrangement is formed as a contactless gas seal, wherein at least one of the rotating axial sealing surface and stationary axial sealing surface has a non-rotationally symmetrical surface structuring wherein the non-rotationally symmetrical surface structuring comprises depressions in the sealing surface, wherein the depressions have in each case a boundary line to the other sealing surface and a bottom surface defined by the boundary line of the depression which has a continuous progression, wherein the depression having a depth of 0, adjoins the other sealing surface on the boundary line.2. The shaft seal arrangement as claimed in claim 1 , wherein a continuous tangential progression characterizes the bottom surface.3. The ...

REDUCED EMISSION GAS SEAL

A dry gas mechanical seal system configured to inhibit the emission of process gas. The mechanical seal system having tandem first and second stage seals, and a single separation gas supply subsystem configured to direct a supply of separation gas from an inlet through interfacing portions of the first stage seal into a process cavity and from the inlet through the interfacing portions of the second stage seal and out through an outlet to the atmosphere, thereby inhibiting the emission of process gas between a compressor housing and a rotating compressor shaft. 116-. (canceled)17. A mechanical seal system for a compressor operating on a process gas in a process cavity at a process cavity pressure , the mechanical seal system comprising:a mechanical seal including a rotating ring operably coupled to a compressor shaft, and a stationary ring operably biased towards the rotating ring by a biasing mechanism operably coupled to a compressor housing, the rotating ring defining grooves that during normal operation are configured to pressurize gas passing between interfacing portions of the rotating ring and the stationary ring to partially counteract a biasing force of the biasing mechanism;a dense barrier gas supply subsystem configured to direct a supply of dense barrier gas from an inlet through interfacing portions of the rotating ring and the stationary ring at a pressure below the process cavity pressure, during normal operation the grooves of the mechanical seal configured to pressurize the dense barrier gas to a pressure above the process cavity pressure to promote an upstream flow of the dense barrier gas from an inner diameter of the mechanical seal to an outer diameter of the mechanical seal and into the process cavity and to maintain an interface gap between interfacing portions of the rotating ring and the stationary ring; anda starting mechanism configured to supply an additional supply of dense barrier gas into the interfacing portions of the rotating ring ...

Sealing system for rotary shaft

A sealing unit for a drive shaft driving a working fluid; the sealing unit comprising a sleeve attached to the drive shaft and a gland attached to the housing, a static seal ring attached to the gland and in close proximity to the sleeve, and a stuffing box about the static seal ring, fibrous packing seal blocking the distal and proximal ends of the stuffing box and a first sealant comprising a viscous, non-Newtonian fluid that is injected into the stuffing box under a first pressure exceeding the pressure of the working fluid; the sealing unit further comprising an inner fluid seal of a Newtonian fluid between the first sealant and the drive shaft upstream of the first sealant, such that the Newtonian fluid seal is kept at a pressure slightly higher than the pressure of the working fluid and prevents the working fluid from reaching the first sealant.

SLIDING COMPONENT

A positive pressure generating mechanism comprising a positive pressure generating groove is provided to a high-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components, and a negative pressure generating mechanism comprising a negative pressure generating groove is provided to a low-pressure side. The positive pressure generating groove and negative pressure generating groove are communicated with a high-pressure fluid side and separated from a low-pressure fluid side by a seal surface. 120-. (canceled)21. A sliding component characterized in that a positive pressure generating mechanism comprising a spiral groove or a dimple directly communicated with a high-pressure fluid side is provided to a high-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components , a negative pressure generating mechanism comprising a reverse Rayleigh step mechanism is provided to a low-pressure side , and a pressure release groove is provided between said spiral groove or dimple and the reverse Rayleigh step mechanism , the pressure release groove and reverse Rayleigh step mechanism being communicated with the high-pressure fluid side and separated from a low-pressure fluid side by a seal surface.22. A sliding component characterized in that a positive pressure generating mechanism comprising a spiral groove or a dimple directly communicated with a high-pressure fluid side is provided to a high-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components , a negative pressure generating mechanism comprising a reverse spiral groove is provided to a low-pressure side , and a pressure release groove is provided between said high-pressure-side spiral groove or dimple and the low-pressure-side reverse spiral groove , said low-pressure-side reverse spiral groove being communicated with the high-pressure fluid side via the pressure release ...

Shaft sealing system and method with seal oil recuperator system

A system and method for sealing a shaft disposed for rotation within a casing, where two axially-spaced seal rings of an oil film seal extend around the shaft and define a clearance therebetween. Oil is pumped into the clearance from an oil reservoir and a portion of the oil is received in an annular port defined in the casing between an outer labyrinth seal and one of the axially-spaced seal rings. The oil mixes with a process gas to for an oil and gas mixture. A blower is in fluid communication with the annular port and circulates the oil and gas mixture to a trap where the oil is separated from the process gas and a separated process gas is returned back to the annular port.

TURBOCHARGER SHAFT SEAL

A seal () for a shaft () of a turbocharger () to prevent liquid from leaking out of a bearing housing (). The seal () includes a cylindrical body extending between opposite end faces () and has a cylindrical bore extending between the opposite end faces () for receiving the shaft () therethrough. The cylindrical bore defines an inner surface () having at least one striation () extending in a helical direction about the shaft (). Rotation of the shaft () relative to the seal () causes a pumping effect on liquid present between the shaft () and the inner surface () of the seal (), thereby causing the liquid to flow back towards the bearing housing (). 142822210164282. A seal ( , ) for a shaft () of a turbocharger () to prevent liquid from leaking out of a bearing housing () , said seal ( , ) comprising:{'b': 116', '118', '116', '118', '22', '106', '112', '22, 'a cylindrical body extending between opposite end faces (, ) and including a cylindrical bore extending between said opposite end faces (, ) for receiving the shaft () therethrough, said cylindrical bore defining an inner surface () having at least one striation () extending in a helical direction about the shaft ();'}{'b': 22', '42', '82', '22', '106', '42', '82', '16, 'wherein rotation of the shaft () relative to said seal (, ) causes a pumping effect on liquid present between the shaft () and said inner surface () of said seal (, ), thereby causing the liquid to flow back towards the bearing housing ().'}242821122216. The seal ( claim 1 , ) as set forth in wherein said helical direction of said at least one striation () is opposite to a direction of rotation of the shaft () when viewed from within the bearing housing ().3428210611222. The seal ( claim 2 , ) as set forth in wherein said inner surface () includes a plurality of striations () extending in said helical direction about the shaft ().44282112. The seal ( claim 3 , ) as set forth in wherein each one of said plurality of striations () is generally ...

MECHANICAL SEAL ARRANGEMENT AND WELL BORE CONVEYOR DEVICE

The invention relates to a mechanical seal arrangement, comprising: 110-. (canceled)11. A mechanical seal arrangement , comprising:a first mechanical seal with a rotating slide ring and a stationary slide ring, which define a sealing gap in between them;a first sealing space that is filled with a sealing liquid, wherein the first mechanical seal seals off the sealing space against a surrounding area;a first piston arrangement with a piston element and flexible wall areas that define a first piston interior space, wherein the first piston interior space is in fluid connection with the first sealing space, and wherein a piston outer surface of the piston element is in fluid connection with the surrounding area;{'b': '1', 'a first pre-stressing appliance that exerts a first preload force (F) on the piston element of the first piston arrangement; and'}{'b': '2', 'a second mechanical seal with a rotating slide ring and a stationary slide ring, which define a sealing gap in between them, a second sealing space and a second piston arrangement with a piston element and flexible wall areas, which define a second piston interior space, wherein the second mechanical seal is arranged between the first sealing space and the second sealing space, and the second piston interior space is in fluid connection with the second sealing space, and a second pre-stressing appliance exerts a second preload force (F) on the second piston arrangement.'}12. A mechanical seal arrangement according to claim 11 , wherein the first piston interior space is an annular space and the piston element of the first piston arrangement is an annular piston.13. A mechanical seal arrangement according to claim 11 , wherein the flexible wall areas comprise a first bellows and a second bellows.14. A mechanical seal arrangement according to claim 11 , wherein the first pre-stressing appliance comprises a plurality of spring elements.153. A mechanical seal arrangement according to claim 11 , further comprising a ...

ROTATING DEVICE

A rotating device includes a rotator on which a magnetic recording disk is to be mounted, and a stationary body that supports the rotator in a freely rotatable manner through a fluid dynamic bearing. A lubricant is continuously applied to a lubricant applied portion in a gap between the rotator and the stationary body and from a second capillary seal to a first capillary seal through a dynamic pressure generating portion of the fluid dynamic bearing. This rotating device is structured so as to reduce an amount of the lubricant spilled and eventually dissipated when shock of substantially 1200 G is applied to be less than 5% of the total amount of the lubricant. 1. A rotating device comprising:a rotator on which a recording disk is to be mounted;a stationary body that supports the rotator in a freely rotatable manner;a dynamic pressure generating portion provided in a lubricant-retained area where a lubricant is to be retained in a gap between the rotator and the stationary body;two capillary seals opened at respective ends of the lubricant-retained area;a cover ring which rotates together with the rotator, and which covers an opening of either one of the two capillary seals; anda cap structure which is provided in a space between the cover ring and the one capillary seal, and which is structured to reduce an amount of the lubricant spilled from the capillary seal and eventually dissipated when shock of substantially 1200 G is applied so as to be less than 5% of a total amount of the lubricant.2. The rotating device according to claim 1 , wherein the cap structure has a gap thereof becoming narrower than an open width of the one capillary seal to suppress a travel of the lubricant.3. The rotating device according to claim 1 , wherein:the cap structure includes two surfaces facing with each other in a radial direction; andone of the two surfaces comprises an upraised portion upraised toward the other surface.4. The rotating device according to claim 3 , wherein the ...

Dry gas seal for supercritical co2 pump-high pressure buffer

Systems and methods for assuring a safe working condition of a dry gas seal when a pump/compressor is in a standstill condition. A small booster compressor is added to boost the pressure of an intermediate buffer gas injected into the chamber between a primary seal and a secondary seal of the dry gas seal. Control components detect when the barrier gas pressure drops below a preconfigured value and when detected, closes a valve in a line to a flare safe area and turns on the compressor. The boosted intermediate buffer gas, Nitrogen or dry air, slows the flow of untreated process gas through the primary seal of the dry gas seal and prevents icing of the primary seal.

Circumferential Back-to-Back Seal Assembly with Bifurcated Flow

A circumferential seal assembly capable of separating a gas into two separate flow paths before communication between a rotatable runner and a pair of seal rings is presented. The seal assembly includes an annular seal housing, a pair of annular seal rings, a rotatable runner, and a plurality of groove structures. The seal housing is interposed between a pair of compartments. The seal rings are separately disposed within the seal housing and separately disposed around the rotatable runner. The groove structures are disposed along an outer annular surface of the rotatable runner. A gas is communicable onto the groove structures. Each groove structure includes at least two hydrodynamic grooves that separate and communicate the gas onto the seal rings. Each groove includes steps whereby the depth of at least one adjoining step decreases in the direction opposite to rotation with or without the depth of another adjoining steps increasing in the direction opposite to rotation.

SLIDING COMPONENT

A pair of sliding components have sliding faces (S) that slide with respect to each other, wherein at least one of the sliding faces (S) includes at least one dimple group () constituted by plural dimples (), and each dimple group () includes at least one opening portion () that is arranged in the one of the sliding faces (S) and radially open to the outside the one of the sliding faces (S). In the sliding components, a dynamic pressure generation mechanism can easily be formed, and a lubricating performance and a sealing performance can improve. 1. A pair of sliding components having sliding faces that slide with respect to each other , characterized in thatat least the sliding face on one side includes at least one dimple group formed by plural dimples, andthe dimple group includes at least one opening portion arranged in the sliding face.2. The sliding components according to claim 1 , characterized in that the dimple group is a pseudo flow passage partitioned by a land portion excluding the opening portion.3. The sliding components according to claim 1 , characterized in that the dimple group extends in the circumferential direction from the opening portion on the sealed fluid side.4. The sliding components according to claim 1 , characterized in that the dimple group extends in the circumferential direction from the opening portion on the leakage side.5. The sliding components according to claim 1 , characterized in thatthe sliding face on one side includes at least one pair of the dimple groups extending in the same direction, andthe dimple group on one side is arranged on the sealed fluid side and communicates with the opening portion on the sealed fluid side, and the dimple group on the other side is arranged on the leakage side and communicates with the opening portion on the leakage side.6. The sliding components according to claim 5 , characterized in that the pair of dimple groups is connected.7. The sliding components according to claim 1 , ...

SEAL FOR A WIND TURBINE NACELLE

Provided is a seal arranged about a tower aperture of a wind turbine nacelle, which seal includes an annular channel shaped to contain a liquid, and an annular lip extending downwards into the annular channel, which annular channel and annular lip are mounted at opposite sides of a gap between the nacelle and a wind turbine tower; and further including a volume of liquid in the annular channel, which liquid volume is sufficient to immerse the annular lip about its lower circumference to prevent a passage of air between nacelle interior and nacelle exterior. A seal maintenance arrangement including such a seal and a device for replenishing the liquid in the annular channel is also provided. 1. A seal arranged about a tower aperture of a wind turbine nacelle , which seal comprisesan annular channel shaped to contain a liquid, andan annular lip extending downwards into the annular channel, which annular channel and annular lip are mounted at opposite sides of a gap between the nacelle and a wind turbine tower; and further comprisinga volume of liquid in the annular channel, which liquid volume is sufficient to immerse the annular lip about its lower circumference to prevent a passage of air between nacelle interior and nacelle exterior.2. The seal according to claim 1 , wherein the annular channel is shaped to expose the upper surface of the liquid.3. The seal according to claim 1 , wherein the annular channel comprises any of an essentially rectangular cross-section or an essentially U-shaped cross-section.4. The seal according to claim 1 , wherein the annular channel is mounted about the tower aperture of the nacelle.5. The seal according to claim 4 , wherein the annular lip is mounted about the upper level of the tower.6. The seal according to claim 1 , wherein the annular channel is mounted about the tower.7. The seal according to claim 6 , wherein the annular lip is mounted about the tower aperture of the nacelle.8. The seal according to claim 1 , wherein the ...

SLIDE COMPONENT

In an embodiment, a slide component includes one slide part provided, on a low-pressure side of a sealing face thereof, with a negative pressure generation mechanism including a negative pressure generation groove . The negative pressure generation groove communicates with a high-pressure fluid side and is separated from a low-pressure fluid side by a land portion R. Another slide part is provided, in a sealing face thereof, with at least one interference groove communicating with the high-pressure fluid side for producing pressure variations in a fluid in the negative pressure generation groove . The at least one interference groove has an end on an inside-diameter side extending to a position to radially overlap the negative pressure generation groove 1. A slide component comprising:a pair of slide parts that relatively slide on each other,one of the slide parts being provided, on a low-pressure side of a sealing face thereof, with a negative pressure generation mechanism comprising a negative pressure generation groove, the negative pressure generation groove communicating with a high-pressure fluid side and being separated from a low-pressure fluid side by a land portion,the other of the slide parts being provided, in a sealing face thereof, with at least one interference groove communicating with the high-pressure fluid side for producing pressure variations in a fluid in the negative pressure generation groove, the at least one interference groove having an end on an inside-diameter side extending to a position to radially overlap the negative pressure generation groove.2. The slide component according to claim 1 , wherein the at least one interference groove comprises a plurality of interference grooves provided circumferentially claim 1 , the plurality of interference grooves being arranged such that when one of the interference grooves is in a position facing an upstream end of the negative pressure generation groove claim 1 , the other interference grooves ...

SEALING ARRANGEMENT FOR USE IN ROBOT JOINT

A sealing arrangement for application in a robot joint. The sealing arrangement includes: a circular sealing assembly arranged between a swing and a base of the robot joint in a longitudinal direction, the circular sealing assembly defining a tubular cavity in a circumferential direction and having a gas inlet and a gas outlet; and an air channel coupled to the gas inlet and operable to continuously conduct pressured air flow into the cavity to maintain an air pressure inside the cavity above an air pressure outside the cavity, and thereby a high-speed airflow out of the gas outlet. 1. A sealing arrangement for use in a robot joint , comprising:a circular sealing assembly arranged between a swing and a base of the robot joint in a longitudinal direction, the circular sealing assembly defining a tubular cavity in a circumferential direction and having a gas inlet and a gas outlet; andan air channel coupled to the gas inlet and operable to conduct pressured air into the cavity to maintain an air pressure inside the cavity above an air pressure outside the cavity.2. The sealing arrangement according to claim 1 , wherein the circular sealing assembly comprises:a sealing ring forming a first side wall and a top wall of the cavity, wherein the first side wall is oriented in the longitudinal direction and the top wall is fixed to the swing and oriented in a horizontal direction that is substantially perpendicular to the longitudinal direction.3. The sealing arrangement according to claim 1 , wherein the circular sealing assembly comprises:a base ring coaxially arranged with the sealing ring and forming a second side wall of the cavity, wherein the second side wall is oriented opposite to the first side wall.4. The sealing arrangement according to claim 1 , wherein the circular sealing assembly further comprises:a radial seal arranged coaxially with the sealing ring and forming a bottom wall of the cavity, wherein the radial seal is positioned between a third side wall of ...

Stabilizing Bushing Constructed of Fiber Reinforced Structural Composite

A stabilizing bushing is constructed of a structural composite including layers of reinforcing fibers in a matrix of synthetic polymeric material, and is inserted between a rotating shaft and a surrounding housing to stabilize the shaft against unwanted radial displacement while rotating within the housing. A plurality of circumferential grooves in the bushing effect a reduction in fluid pressure between one end of the bushing exposed to higher fluid pressures than to which the opposite end of the bushing is exposed. The bushing is constructed in the form of circumferential segments selectively joined together at Z-shaped joints for facilitating the insertion and establishment of a securely integrated stabilizing bushing in position around the shaft. 1. A stabilizing bushing for insertion between a rotating member and a surrounding structure to stabilize the rotating member against unwanted radial displacement while rotating within the surrounding structure , with one of axially opposite ends of the stabilizing bushing exposed to fluid pressure within the surrounding structure , the stabilizing bushing comprising:an annular body constructed of a structural composite including a plurality of layers of reinforcing fibers in a matrix of synthetic polymeric material, the layers extending transverse to an axial direction, essentially parallel to one another and juxtaposed with one another, stacked consecutively adjacent one another essentially along the axial direction, thereby establishing an entire stack of the plurality of adjacent layers, the reinforcing fibers of each layer being woven in a pattern oriented essentially perpendicular to the axial direction, and further reinforcing fibers extending through the juxtaposed layers, along further directions essentially parallel to the axial direction;an outer perimeter having an outer diameter dimensioned and configured for supporting the annular body within the surrounding structure;an inner perimeter having an inner ...

EXTERNALLY PRESSURIZED POROUS MEDIA GAS BEARING FOR USE IN VALVES AND PREVENTING FUGITIVE EMISSIONS OF THE SAME

In order to drastically improve the functionality of flow control, externally-pressurized porous media gas bearings is introduced into valves. The porous media gas bearings mitigate two of the biggest issues with the current technology, which are: (1) leakage of fugitive emissions, and (2) high breakaway torque values for actuating valves. By employing externally-pressurized porous media bearings, fugitive emissions are completely eliminated, and valves can be rotated effortlessly due to the non-contact nature of porous media gas bearings. 1. An aerostatic bearing-seal for valves , comprising:one or more circumferential porous media sleeves, each circumferential porous media sleeve surrounding an associated valve stem; andconductive passages for communicating externally pressurized gas into at least one plenum and into the porous media.2. The aerostatic bearing-seal of wherein the valve is sealed and prevents fugitive emissions due to the externally pressurized gas in a gap between the porous media sleeve and the valve stem.3. The aerostatic bearing-seal of wherein the valve stem rotates without friction when external gas pressure is supplied to the porous media.4. The aerostatic bearing-seal of further comprising a containment that completely surrounds the valve stem.5. The aerostatic bearing-seal of wherein the valve stem includes a first driven magnet claim 4 , which is driven by a second driving magnet which is exterior to the first driven magnet.6. The aerostatic bearing-seal of in which the porous media sleeve may be comprised of a material selected from the group consisting of graphite claim 1 , carbon claim 1 , silicon carbide. Tungsten carbide claim 1 , porous diamond claim 1 , diamond-like coated claim 1 , alumina claim 1 , and carbon-carbon.7. The aerostatic bearing-seal of wherein the porous media sleeve is manufactured using a process selected from the group consisting of:ceramic casting and 3-D printing.8. An aerostatic seal claim 1 , comprising:one or ...