ГАЗОДИНАМИЧЕСКИЙ РАДИАЛЬНЫЙ ПОДШИПНИК

Использование: в радиальных опорах высокоскоростных роторов турбомашин различного назначения /турбохолодильников, турбодетандеров, турбонагнетателей, турбогенераторов и др/. Сущность: газодинамический радиальный подшипник содержит корпус с пазами для установки лепестков. Лепестки имеют хвостовики незамкнутого коробчатого типа, в которых свободно /с зазором/ установлены призматические шпонки. В шпонке выполнен поперечный паз, в консольной стенке хвостовика лепестка - ответный язычок, препятствующий смещению и выпадению шпонки из хвостовика. Это повышает надежность за счет обеспечения работоспособности при нерасчетном возрастании амплитуды колебаний ротора, снижает требования к точности изготовления и сборки благодаря повышенной способности опор к самоустанавливаемости и повышает ремонтопригодность за счет упрощения ремонта подшипников и исключения возможности повреждения цапф ротора на аварийных режимах. 2 ил.

Hydrodynamisches Gleitlager.

FLUID FILM BEARINGS

... 1401657 Bearings MECHANICAL TECHNOLOGY Inc 2 Aug 1972 [5 Aug 1971] 36088/72 Heading F2A A hydrodynamic bearing has between two relatively movable parts 15, 17 an insert 13 comprising one bearing element 25 formed of a web or strip of metal or other resilient material which presents one surface to one of the movable parts and another surface to a surface of a second bearing element 23 which surface exhibits a plurality of spaced projections 27, the arrangement being such that the first element bears against the projections and is slidable thereon so that the element may deflect between adjacent projections to facilitate the creation of a hydrodynamic film. The two bearing elements are anchored together so that limited sliding movement is possible between portions thereof, and the bearing insert may be anchored to one of the movable parts so that limited movement is permitted therebetween. The bearing elements may be of steel, tungsten, taltalum or molybdenum and may be provided with a coating ...

FOIL BEARINGS

Gas turbine compressor foil thrust bearing

A gas turbine engine includes a compressor rotor 314, a compressor stator 312 coupled upstream from the compressor rotor, and a bearing assembly 300 coupled there between. The bearing assembly 300 includes a pair of foil thrust bearings 334, 336 coupled to a portion of the compressor stator 312, and a pair of spring packs 338, 340 coupled substantially co-axially to the pair of foil thrust bearings 334, 336. A second bearing assembly may be coupled downstream from the bearing assembly 300, the second bearing assembly including a radial foil bearing 356. One of the foil thrust bearings 334 may be coupled upstream of a radially inner portion 328 of the compressor stator 312, the other foil thrust bearings 336 being coupled downstream of a radially inner portion 328 of the compressor stator 312.

Foil bearings

FRUSTO CONICAL FOIL BEARING

AERODYNAMIC FOIL INSERT BEARING

HYDRODYNAMIC FOIL INSERT BEARINGS

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

TURBO COMPRESSOR WITH COMPONENTS

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

RESILIENT FOIL BEARINGS

RESILIENT FOIL BEARINGS A fluid-film foil bearing has a resilient bearing insert assembly disposed between a rotatable and a stationary member. The insert assembly comprises a plurality of resilient corrugated spring pad supports separated from each other to provide a series of spaces and a compliant, unitary foil mounted on the pad supports, the foil having a plurality of perforations aligned across its entire width and over the spaces which are operative under dynamic conditions both to initiate foil deflection and to cause uniform replenishment of fluid lost through side leakage.

COATED FLUID BEARING FOILS AND FABRICATING METHOD

RADIAL FOIL BEARING

These radial wheel bearings (3, 3A, 3B, 3D) are provided with a corrugated plate-like back wheel (11) and a middle wheel (10) supported by the back wheel (11), wherein the middle wheel is provided with: a planar part (10b) facing a ridge part (11c) of the corrugated plate shape of the back wheel; and protrusion parts (39, 40, 40a, 40b, 40B) which, at circumferential positions between the vertex section of at least one ridge part of the corrugated plate shape of the back wheel and the vertex section of the ridge neighboring the at least one ridge part, protrude toward the back wheel side via a branch.

RADIAL FOIL BEARING

This radial foil bearing (3, 3A, 3B) is provided with: a housing (12) which has a through-hole (12a) and in which a pair of engaging grooves (15) which extend from an inner peripheral edge toward a radially outer side of the through-hole are provided separately on both end surfaces in an axial direction; a back foil (11) disposed on an inner peripheral surface of the through-hole; an intermediate foil (10) supported by the back foil; and an engaging member (30) having a pair of engaging legs (31) which engage with the pair of engaging grooves, and a connecting portion (32) connecting the pair of engaging legs to one another. A recessed portion (10c) which is recessed toward the back foil side and which projects outward is provided in the intermediate foil, and the connecting portion is disposed in the recessed portion.

RADIAL FOIL BEARING

A radial foil bearing (3) includes: a cylindrical top foil (10) disposed so as to face a rotary shaft (1); a back foil (11) disposed outside in the radial direction of the top foil; and a cylindrical bearing housing (12) accommodating the top foil and the back foil. The bearing housing is provided with a limiting member (30, 40) which limits movement of the back foil. A locking recess (21) is provided in a central part in the axial direction of an inner circumferential surface of the bearing housing. In addition, the limiting member includes a locking protrusion (32, 42) and is fixed to the bearing housing by the locking protrusion being locked into the locking recess.

VENTILATED AERODYNAMIC FOIL BEARING

L'invention concerne un palier aérodynamique à feuilles, sous forme de palier radial ou de butée (1') axiale, comportant un rotor (2) et un stator (3) comprenant un support (4) adapté pour supporter en regard du rotor un sustentateur (5), comportant : - une pluralité de feuilles (6) élastiques régulièrement réparties, fixées par un bord de fixation (7), sur une surface du sustentateur en regard du rotor, - des rangées d'orifices (13) de ventilation, traversant le sustentateur (5) et débouchant entre un bord libre de chaque feuille (6) élastique et le bord de fixation (7) de la feuille suivante, caractérisé en ce que le support (4) comprend une cavité (10) présentant des rainures (1') s'étendant sous les rangées d'orifices (13) de ventilation et au moins une rainure (12) circulaire coupant lesdites rainures, alimentée par un flux de gaz de refroidissement sous pression pour le répartir de manière à refroidir la face inférieure de chaque feuille (6) et à fournir un apport de gaz frais au-dessus ...

AERODYNAMIC PLAIN BEARING

Palier hydrodynamique

GAS BEARING FOR FAST ROTATING PARTS.

FOIL SLIDING BEARING, IN PARTICULAR FOR CHEMICAL PUMPS.

GAS BEARING FUER FAST ROTATING PARTS AT SPINN OR DOUBLING FRAMES.

A miniature motor

STAGE HAS FLUID HYDRODYNAMICS COMPRISING AN ELEMENT OF SUPPORT OF BLADE

PALIER EN FEUILLE DE METAL

L'INVENTION CONCERNE UN PALIER EN FEUILLE DE METAL QUI COMPREND UN ARBRE ROTATIF ET UNE FEUILLE DE METAL FLEXIBLE ENTOURANT L'ARBRE AFIN DE LE SUPPORTER PAR UNE COUCHE DE GAZ FORMEE ENTRE L'ARBRE ROTATIF ET LA FEUILLE DE METAL. SELON L'INVENTION, IL COMPREND DE PLUS DEUX PARTIES EN CREUX 30 DISPOSEES DE MANIERE OPPOSEE SUR LES DEUX EXTREMITES AXIALES DE LA FEUILLE DE METAL 12 LE LONG DE L'AXE DE L'ARBRE ROTATIF 10 POUR EVITER UN CONTACT DE LA FEUILLE DE METAL AVEC L'ARBRE LORS D'UNE ROTATION RAPIDE DE CE DERNIER. L'INVENTION S'APPLIQUE NOTAMMENT AUX PALIERS FLUIDES.

PALIER EN FEUILLE DE METAL ET PROCEDE DE FABRICATION

L'INVENTION CONCERNE UN PALIER EN FEUILLE DE METAL. SELON L'INVENTION, IL COMPREND UNE FEUILLE DE METAL FLEXIBLE 22 QUI EST SUPPORTEE PAR UN CERTAIN NOMBRE D'ORGANES DE SUPPORT 13, 14, 15 QUI SONT ESPACES LES UNS DES AUTRES A UNE DISTANCE APPROPRIEE EN DIRECTION CIRCONFERENTIELLE D'UN ARBRE ROTATIF A APPLIQUER DE FACON QUE CET ARBRE PUISSE ETRE ENTOURE PAR LA FEUILLE DE METAL, CETTE FEUILLE DE METAL ETANT FORMEE PAR TRAITEMENT THERMIQUE POUR QUE SA SURFACE D'APPUI AIT UN DIAMETRE SUFFISAMMENT PLUS GRAND QUE CELUI DE L'ARBRE ROTATIF POUR MAINTENIR UN JEU PREDETERMINE ENTRE L'ARBRE ROTATIF ET LA SURFACE D'APPUI DE LA FEUILLE A L'ASSEMBLAGE DE L'ARBRE ROTATIF EN ATTACHANT SOLIDEMENT AU MOINS UNE EXTREMITE DE LA FEUILLE A L'ORGANE DE SUPPORT. L'INVENTION S'APPLIQUE NOTAMMENT AUX PALIERS FLUIDES.

STAGE HAS SHEET ELASTIC

RADIAL STAGE FOR MACHINES HAS FLUID TURNING HAS HIGH SPEED

SELF LUBRICATING COATING MATERIAL FOR HIGH TEMPERATURE OPERATION AND A PART COVERED WITH SUCH A MATERIAL

AERODYNAMIC ELASTIC BEARING HAS MULTIPLE CORNERS

AERODYNAMIC BEARING HAS SHEETS VENTILATED

L'invention concerne un palier aérodynamique à feuilles, sous forme de palier radial ou de butée (1') axiale, comportant un rotor (2), mobile en rotation autour d'un axe et un stator (3) comprenant un support (4) adapté pour supporter en regard du rotor une seconde structure, dite sustentateur (5), comportant : • une pluralité de feuilles (6) élastiques régulièrement réparties, s'étendant sur un secteur circulaire et fixées par un bord de fixation (7), sur une surface du sustentateur en regard du rotor, • des orifices (13) de ventilation, traversant le sustentateur (5) depuis la face en regard du support (4) jusqu'à la face portant les feuilles élastiques, les orifices de ventilation débouchant entre un bord libre de chaque feuille (6) élastique et le bord de fixation (7) de la feuille suivante, caractérisé en ce que le support (4) comprend une cavité (10) s'étendant sous les orifices (13) de ventilation et adaptée pour être alimentée par un flux de gaz de refroidissement sous pression ...

PALIER OU BUTEE HYDRODYNAMIQUE EN PARTICULIER PALIER A FEUILLE

PALIER HYDRODYNAMIQUE, NOTAMMENT PALIER A FEUILLES DONT L'ARBRE EST DESTINE A TOURNER A VITESSE ELEVEE, AU MOINS 30 000 TOURS PAR MINUTE. LA SURFACE EXTERNE DE L'ARBRE 10 EST LUBRIFIEE A SEC PAR INCRUSTATION DE BISULFURE DE MOLYBDENE OU DE GRAPHITE.

METHODS OF PREPARING FOILS FOR A FLUID FOIL BEARING AND IN FLUID FOIL BEARINGS

IMPROVEMENT WITH the HYDRODYNAMIC BEARING AND PROCEEDED OF ASSEMBLY Of SUCH a STAGE

AIR FOIL JOURNAL BEARING HAVING IMPROVED TOP FOIL

The present invention relates to an air foil journal bearing having an improved top foil, comprising: a bearing housing formed with a hollow on which a rotor is disposed, and formed with opened both sides in a width direction; a bump foil provided inside of the bearing housing to be formed along a circumferential direction, and coupled to the bearing housing to be fixated thereto; and a top foil provided inside the bump foil to be formed along the circumferential direction, and having one side coupled to the bearing housing and fixated thereto. The top foil comprises: an outer top foil closely attached to the bump foil; an inner top foil provided on the inside of an outer top foil to be in contact with a rotor; and an intermediate top foil interposed between the outer top foil and the inner top foil, and having a shorter length than the outer top foil and the inner top foil such that an end of the other side is located on a lower side of the rotor. As such, when a rotor is rotated, a lateral ...

GAS TURBINE ENGINE AND FOIL BEARING SYSTEM

BEARING ARRANGEMENT

압신기

... 본 발명은 압신기에 관한 것으로, 회전 가능하게 구비되는 샤프트, 샤프트의 동축에 위치되며, 샤프트의 일단에 장착되는 압축기, 샤프트의 동축에 위치되며, 샤프트의 타단으로 백투백으로 장착되는 익스팬더 및 샤프트의 회전을 지지하는 에어 포일 베어링을 포함할 수 있다. 또한, 상기와 같은 압신기는, 실시예에 따라 다양하게 구현될 수 있다.

AN INTEGRATED MAGNETIC/FOIL BEARING AND METHODS FOR SUPPORTING A SHAFT JOURNAL USING THE SAME

An integrated bearing system (10) for supporting a rotatable shaft journal (58). The system (10) comprises a foil bearing (40) in combination with a magnetic field generating device (50) that produces a magnetic bearing capability to the rotatable shaft journal (58). The foil bearing (40) is integrated into the magnetic field generating device (50), leaving an air gap between the shaft journal (58) and the foil bearing (10). Under normal operating conditions, the magnetic field generating device (50) and the foil bearing (10) each provide a portion of the support to the shaft journal (58).

FOIL BEARING

The purpose of the invention is to provide a leaf-type foil bearing with which high rotational precision is obtained and which is able to handle further increases in rotation rate. The foil bearing (10) is provided with: a cylindrical outer member (11); a shaft (6) inserted in the inner circumference of the outer member (11); and leaves (14) disposed at multiple sites in the circumferential direction between the inner circumferential surface (11b) of the outer member (11) and the outer circumferential surface (6a) of the shaft (6). The region of each leaf (14) that comprises the front edge (14a) forms a top foil (Tf) having a bearing surface (14c). The region of each leaf (14) that comprises the back edge (14b) forms a back foil (Bf), which supports the top foil of the adjacent leaf from behind. Either or both the front edge (14a) and the back edge (14b) of each leaf (14) are inclined with respect to the axial direction.

BI-DIRECTIONAL FOIL BEARINGS

A foil bearing (10) allows first and second directions of rotation. The foil bearing comprises a housing (12), a foil bearing assembly including a compliant foil (16) secured to the housing (12), and a spring segment (24) underlying the foil (16). The spring segment having a first stiffness profile in a first zone and a second stiffness profile in a second zone. The first stiffness profile allows rotation in the first direction and the second stiffness profile allows rotation in the second direction.

Foil bearing

A fluid film foil bearing having a resilient trailing edge support.

METHOD FOR COATING A TURBOMACHINE PART WITH A SELF-LUBRICATING COATING AND PART COATED BY SAID METHOD

A method for coating a turbomachine part with a self-lubricating includes: providing a rotor or thrust disc of the turbomachine; applying, by a thermal spraying process, a self-lubricating coating having of a mixture of 50 to 90 wt % of alumina (AlO) with titanium oxide (TiO) to a surface of the rotor and/or a surface; and finishing the coated surface of the rotor and/or thrust disc. 1. A method for coating a turbomachine part with a self-lubricating coating , the method comprising:providing a rotor or thrust disc of the turbomachine;{'sub': 2', '3', '2, 'applying, by a thermal spraying process, a self-lubricating coating consisting of a mixture of 50 to 90 wt % of alumina (AlO) with titanium oxide (TiO) to a surface of said rotor, to a surface of said thrust disc or both to a surface of said rotor and to a surface of said thrust disc; and'}finishing the coated surface of said rotor, said thrust disc or both said rotor and said thrust disc.2. The method of claim 1 , wherein the self-lubricating coating comprises between 65 and 75 wt % of alumina (AlO).3. The method of claim 1 , wherein the self-lubricating coating consists of 70 wt % of alumina (AlO) and 30 wt % of titanium oxide (TiO).4. The method of claim 1 , wherein the self-lubricating coating comprises no metal binder between the alumina (AlO) and titanium oxide (TiO).5. The method of claim 1 , wherein the thermal spraying process is an air plasma spraying process.6. The method of claim 1 , wherein the surface of the rotor onto which the self-lubricating coating is applied is a circular cylindrical portion thereof.7. The method of claim 1 , wherein the surface of the thrust disc onto which the self-lubricating coating is applied is a face thereof.8. The method of claim 1 , wherein the self-lubricating coating can withstand temperatures of up to 400° C.9. The method of claim 1 , wherein the self-lubricating coating has a friction coefficient of 0.13 at 350° C.10. The method of claim 5 , wherein the coated ...

Rotor support structures including anisotropic foil bearings or anisotropic bearing housings and methods for controlling non-synchronous vibrations of rotating machinery using the same

Rotor support structures including anisotropic foil bearings or anisotropic bearing housings are provided for controlling non-synchronous vibrations of rotating machinery. The rotor support structure comprises a foil bearing adapted to be disposed around a journal of a rotating rotor shaft and a bearing housing disposed around the foil bearing, wherein one of the foil bearing or the bearing housing is configured to be anisotropic. The anisotropic foil bearing and anisotropic bearing housing exhibit a stiffness in a first support direction that varies in magnitude from that in a second support direction that is substantially orthogonal to the first support direction.

Airfoil-magnetic hybrid bearing and a control system thereof

An airfoil-magnetic hybrid bearing, which is a combination of a magnetic bearing and airfoil bearing includes a housing, an airfoil bearing, a magnetic bearing, coils, and a coupling segment. The housing is around a rotating shaft of a rotation device. The airfoil bearing is positioned between the housing and the rotating shaft to form dynamic pressure to levitate the rotating shaft during rotation of the rotating shaft. The magnetic bearing includes cores positioned radially between inner surface of the housing and outer surface of the airfoil bearing. The cores are projected to the center of the rotating shaft. The coils wound to the cores to levitate the rotating shaft using a magnetic attractive force generated by a current application thereto. The coupling segment is configured to couple the airfoil bearing to the magnetic bearing directly.

Resonance vibration control method and system

A bearing arrangement includes a shaft, at least one contact bearing and at least one non-contact bearing and a controller. The controller is configured to control a magnitude of a restoring force applied to the shaft by the non-contact bearing in accordance with a sensed parameter such that a stiffness of the shaft is modified such that one or more resonance frequencies of the shaft are moved away from one or more external forcing frequencies.

Force transducer with tapered beam

Die Erfindung betrifft einen Kraftaufnehmer - mit einem ersten Anschlusspunkt und einem zweiten Anschlusspunkt, die über einen elastischen Federkörper miteinander verbunden sind und durch Krafteinleitung an wenigstens einem der beiden Anschlusspunkte bei Verformung des Federkörpers relativ zueinander bewegbar sind; wobei - der Federkörper zumindest teilweise durch eine Biegebalken gebildet wird, der entlang seiner Längsachse von einer Einspannstelle zu einem Balkenende verläuft und der sich unter der Krafteinleitung quer zu seiner Längsachse biegt; - mit einem an wenigstens einer Oberfläche des Biegebalkens angeschlossenen Sensor, welcher die Verformung des Biegebalkens zumindest über einem Verformungsabschnitt, der sich in Richtung der Längsachse erstreckt, erfasst. Die Erfindung ist dadurch gekennzeichnet, dass - die Höhe und/oder die Breite des Biegebalkens in Richtung von der Einspannstelle zu dem Balkenende zumindest über dem Verformungsabschnitt kontinuierlich verjüngt ausgeführt ...

JOURNAL-FOIL AIR BEARING

FOIL BEARING DEVICE

There are provided a rotational shaft 2, a bearing inner ring 3 which is pressed into the outer periphery of the rotational shaft 2, a foil 4 which is disposed in the outer periphery of the bearing inner ring 3, and a bearing outer ring 5 which is formed in the outer periphery of the foil 4, where the bearing inner ring 3 is provided with a pair of foil displacement regulating portion 6 and 7 which regulates an axial displacement of an inner peripheral side 4a of the foil 4.

Foil journal bearing cooling

A fluid film journal bearing 10, comprises a bushing (14, a shaft (12), and a compliant foil bearing (16) including a plurality of individual foils (50, 60, 64, 68, 72, 74, 84, 88, 92, 94) mounted within the bushing, the trailing edge of each foil overlapping the leading edge of the adjacent foil. An axial flow of cooling fluid across the foil is provided by means of at least one slot (56, 50, 82) in a coating of high-lubricity material (54, 78) on the concave surface of each foil. Optionally, one or more rows of holes (62, 66, 70, 86, 90, 96, 98) may be provided, extending axially of the foil, and located within and/or adjacent and parallel to the slot (56) or slots (80, 82).

Hydrodynamic foil bearing

MANUFACTURING DEVICE OF FOIL TYPE FLUID BEARING

PROBLEM TO BE SOLVED: To perform welding by highly accurately and easily positioning a plurality of foil members having a waveform part in the peripheral direction to an inner peripheral surface of a rest holding member for surrounding the outer periphery of a journal via an annular void. SOLUTION: This manufacturing device 11 of a foil type fluid bearing has a cylindrical outer peripheral part of arranging a waveform corresponding part 21 forming a corresponding shape in at least a part of an arc-shaped part (a waveform part) of bump foil 7, and also has a positioning member 12 positioning the foil members 7 to an inner peripheral surface of the rest holding member 2 by inserting the waveform corresponding part 21 inside the rest holding member 2 in a state of engaging with the arch-shaped part of the foil members 7. The positioning member 12 has a slot 22 opening in the axial direction in its cylindrical outer peripheral part, and the bump foil 7 is welded to the inner peripheral surface ...

ГИДРОДИНАМИЧЕСКИЙ ОПОРНЫЙ ПОДШИПНИК

Изобретение относится к опорным подшипникам и в особенности к средствам предотвращения перекосов для гидродинамического воздушного подшипника. Гидродинамический опорный подшипник содержит верхний вкладыш из ленты, промежуточный вкладыш из ленты и вкладыш из гофрированной ленты, которые свернуты вокруг оси в форме цилиндра. Верхний вкладыш из ленты имеет прямоугольную форму, противоположные кромки и противоположные края, к одному из которых присоединена шпонка, при этом на другом противоположном крае верхнего вкладыша из ленты имеются стопорные средства, содержащие противоположные выступающие части, каждая из которых выходит за противоположные кромки указанного вкладыша из ленты и которые загнуты с перекрытием частей противоположных боковых кромок промежуточного вкладыша из ленты. Технический результат: предотвращение осевых сдвигов и деформации подшипника 2 с. и 5 з.п. ф-лы, 7 ил.

МНОГОЛЕПЕСТКОВЫЙ ГАЗОДИНАМИЧЕСКИЙ ПОДШИПНИК

Изобретение относится к машиностроению, в частности к подшипникам скольжения с жидкостной и газовой смазкой, используемым для радиальной подвески роторов высокоскоростных турбомашин различного назначения, например турбохолодильников, турбодетандеров. Подшипник включает корпус подшипника с цапфой, расположенные в кольцевом пространстве между внутренней поверхностью корпуса и цапфой два или более верхних лепестка, представляющие собой гладкие податливые ленты, простирающиеся в окружном направлении вокруг цапфы и прилегающие своей внутренней поверхностью к цапфе. Между наружными поверхностями верхних лепестков и внутренней поверхностью корпуса подшипника расположены в окружном направлении упругодемпферные секции, состоящие из пружинных элементов, прилегающих наружной стороной к внутренней поверхности корпуса подшипника, и гладких податливых лепестков, расположенных между внутренними поверхностями пружинных элементов и наружными поверхностями верхних лепестков. Хотя бы одна секция содержит ...

РОТОРНАЯ СИСТЕМА И СПОСОБ УПРАВЛЕНИЯ

В данном изобретении описывается роторная система и способ управления ею, а также газотурбинная генераторная установка и способ управления ею, при этом роторная система включает в себя вращающийся вал, корпус которого имеет интегрированную конструкцию и расположен горизонтально, и на валу по порядку расположены генератор и компрессор; упорный подшипник и как минимум два радиальных подшипника, установленные на вращающемся валу, упорные и радиальные подшипники являются бесконтактными подшипниками; упорные подшипники установлены таким образом, чтобы центр тяжести роторной системы располагался между двумя радиальными подшипниками, наиболее удаленными друг от друга. В данном изобретении посредством исполнения тела вала роторной системы в виде единой конструкции устраняется проблема существующих газотурбинных генераторных установок, заключающаяся в ограниченности места монтажа газомагнитных упорных подшипников вследствие применения муфты сцепления валов. В настоящем изобретении также предусматривается ...

ПОДШИПНИКОВЫЙ УЗЕЛ (ВАРИАНТЫ)

... 1. Упруго-демпферный блок дляленточного подшипника, включающего часть ротора, в дальнейшем вращающийся элемент, корпус, верхнюю ленту, расположенную между вращающимся элементом и корпусом, содержащий:волнообразный элемент, расположенный между верхней лентой и корпусом, имеющий хотя бы одну волну, имеющий две или более выступающих в одну сторону, в дальнейшем первую сторону, частей,содержащий два или более фрикционных элементов, расположенных с первой стороны от волнообразного элемента, закрепленных каждый на указанном волнообразном элементе по одной линии вдоль гребня указанной волны,содержащий одну или более пар фрикционных элементов, где фрикционные элементы из каждой пары расположены с образованием двух или более линий прилегания друг к другу напротив выступающих в первую сторону частей волнообразного элемента,имеющий расстояние одну или более волн между местами крепления фрикционных элементов из каждой пары к волнообразному элементу,где указанные количественные признаки упруго-демпферного ...

ЛИСТОВАЯ ПРУЖИНА

... 1. Листовая пружина, состоящая из множества элементарных пружин, соединяющихся между собой узкими перемычками по боковым сторонам, отличающаяся тем, что множество элементарных пружин состоит из нескольких частей, каждая из этих частей включает только элементарные пружины одинаковой длины, пружины из различных частей указанного множества имеют различные длины, при этом элементарные пружины чередуются так, что образуют две или более групп, состоящих из элементарных пружин различной длины.2. Листовая пружина по п.1, отличающаяся тем, что элементарные пружины имеют дугообразную форму.3. Листовая пружина по п.2, отличающаяся тем, что элементарные пружины имеют цилиндрические поверхности с общей образующей и общей направляющей.4. Листовая пружина по п.2, отличающаяся тем, что элементарные пружины различной длины имеют различную ширину.5. Листовая пружина по п.2, отличающаяся тем, что элементарные пружины одинаковой длины имеют одинаковую ширину.6. Листовая пружина по п.2, отличающаяся тем, что ...

Radialfolienlager mit Flüssigkeitsfilm

Foliengaslagervorrichtung zum Lagern eines Rotors sowie Verfahren und Verwendung

Bei Foliengaslagern für Rotoren besteht Interesse an hoher Tragfähigkeit und robuster Lagerung, insbesondere auch bei hohen Drehzahlen. Stabilität und Lagetoleranz in radialer Richtung sind weitere wichtige Anforderungen. Bereitgestellt wird eine Foliengaslagervorrichtung (10) zum Lagern eines Rotors (12) mittels Gas (G), mit einer rotorseitigen Top-Folieneinrichtung (14) und mit einer die Top-Folieneinrichtung in einer Lagerbuchse abstützenden Bump-Folieneinrichtung (15), wobei die Foliengaslagervorrichtung eine Mehrzahl von schräg zur axialen Richtung (x) und schräg zur Umfangsrichtung (α) verlaufende Ausnehmungen (17) umfasst, die in wenigstens einem axialen Abschnitt (17.3, 17.4, 17.5) der Lagerung angeordnet sind und eingerichtet sind zum Aufbauen eines Drucks in einem zwischen dem Rotor und der Top-Folieneinrichtung gebildeten radialen Spalt (13) der Lagerung, insbesondere auch in einem unstrukturierten Axialabschnitt (17.6). Hierdurch kann ein robustes und tolerantes Lager mit hoher ...

FOLIENRADLAGER MIT HYDRODYNAMISCHEM FLÜSSIGKEITSFILM

Folienlager

Die Erfindung betrifft ein Folienlager (2) zum Lagern einer Welle (12), umfassend ein hülsenartiges Lagergehäuse (4) mit drei über den Innenumfang des Lagergehäuses (4) verteilt angeordneten, jeweils einen Umfangsabschnitt des Lagergehäuses (4) überdeckenden Folienanordnungen (6, 8, 10), die jeweils eine an der Gehäuseinnenwand anliegende Wellfolie (14) und eine diese überdeckende Deckfolie (16) umfassen, wobei die die Deckfolien (16) in Umfangsrichtung begrenzenden Endkanten (22) der Deckfolien (16) sich jeweils an der Gehäuseinnenwand ausgebildeten Haltemitteln abstützen. Bei diesem Folienlager ist gemäß der Erfindung vorgesehen, dass an der Gehäuseinnenseite längs Mantellinien sich erstreckende, schräg von innen nach außen in die Gehäusewand hineinragende Stecknuten (18, 20) ausgebildet sind, deren jede jeweils eine Endkante (22) einer Deckfolie (16) sowie eine an der zugeordneten Wellfolie (14) ausgebildete Endkante (24) aufnimmt, und dass bei im Querschnitt kreisförmiger Innenkontur ...

Improvements relating to bearings

... 1,066,645. Bearings. GARRETT CORPORATION. July 9, 1964 [July 11, 1963 (2)], No. 28452/64. Heading F2A. A fluid bearing has, as an additional bearing support, at least one relatively thin flexible element. The flexible element may be made of polyethylene terephthalate or of spring steel for example. In an embodiment, three thin flexible elements (74), Fig. 2 (not shown), are provided, each of which is partly wrapped around a pair of posts (72), is secured to a support (34) of a housing and has its centre portion (74a) engaging a shaft (40) so that the latter is supported thereby. In use, a film (f), Fig. 4 (not shown), of fluid is generated by the rotating shaft (40) and damping is facilitated by the elements (74). In another embodiment, three posts (130), Fig. 7 (not shown), are provided, each of which has a flexible element (132) anchored thereto. Each element (132) engages a shaft (137) and an adjacent post (130); is suitably bent for engagement by an adjusting-screw (138); and is attached ...

FOIL BEARING STIFFENER

FOIL SLIDING BEARING, IN PARTICULAR FOR CHEMICAL PUMPS

SEITENVIBRATIONSSCHUTZ

FOLIENGLEITLAGER, INSBESONDERE FUER CHEMIEPUMPEN

SEITENVIBRATIONSSCHUTZ

FLUID FILM CAMP WITH FLEXIBLE FOIL AND EDDY CURRENT ABSORBER

SIDE VIBRATION PROTECTION

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

HYDRODYNAMIC FLUID FILM CAMP WITH A DIAPHRAGM COMPONENT WITHOUT PARALLEL KEY

ADJUSTABLE CLEARANCE FOIL JOURNAL BEARING AND METHOD OF MANUFACTURING FOIL ELEMENT THEREFOR

RADIAL FOIL BEARING

The present invention provides a radial foil bearing for supporting a high- speed rotating shaft. The radial foil bearing comprises a top foil (1): a key (2) welded to a cut portion of the top foil; an inner bump coil (3) disposed outwards of the top foil, the inner bump being formed of a wider and higher bump and a narrower and lower bump alternately arranged; an outer bump foil (4) disposed outwards of the inner coil, the outer bump having a height lower the that of the narrower and lower bump of the inner bump foil; a bump sheet (5) for fixing the inner bump and the outer bump; and a bearing housing (6) disposed outwards of the bump sheet and having a key groove (7).

Foil bearing apparatus.

There are provided a rotational shaft 2, a bearing inner ring 3 which is pressed into the outer periphery of the rotational shaft 2, a foil 4 which is disposed in the outer periphery of the bearing inner ring 3, and a bearing outer ring 5 which is formed in the outer periphery of the foil 4, where the bearing inner ring 3 is provided with a pair of foil displacement regulating portion 6 and 7 which regulates an axial displacement of an inner peripheral side 4a of the foil 4.

ЛЕНТОЧНЫЙ РАДИАЛЬНЫЙ ПОДШИПНИК

Предлагается ленточный радиальный подшипник, предназначенный служить опорой для вала с высокой частотой вращения. Ленточный радиальный подшипник содержит верхнюю ленту 1; шпонку 2, приваренную к обрезанной части верхней ленты; внутреннюю гофрированную ленту 3, размещенную снаружи верхней ленты, причем внутренняя лента образована из более широкого и высокого гофра и более узкого и низкого гофра, расположенных попеременно; внешнюю гофрированную ленту 4, размещенную снаружи внутренней ленты, причем названный внешний гофр имеет высоту, меньшую высоты названного более узкого и низкого гофра внутренней гофрированной ленты; контактный лист 5, предназначенный для прикрепления внутреннего гофра и внешнего гофра; и корпус 6 подшипника, расположенный снаружи контактного листа, который имеет шпоночный паз 7.

radial direction foil bearing

A small micro-gas turbine generator

Improvements with butted and hydrodynamic bearings

Journal air bearing

An example journal air bearing for a rotatable shaft of an air cycle machine includes a top foil configured to receive a rotatable shaft, and an intermediate foil radially outboard the top foil. A journal sleeve is radially outboard the intermediate foil. The top foil and the intermediate foil establish apertures configured to communicate fluid between a first position radially inboard the top foil and a second position radially outboard the intermediate foil.

Foil thrust bearing applicable to high speed machining center

A foil thrust bearing applicable to high speed machining and grinding machines for machining microscopic features. Top foil segments are circumferentially spaced relative to a rotating runner for engagement by the runner when the bearing is mounted to bearingly support runner rotation. Bump foil segments underlie and support and engage the top foil segments respectively. A thrust plate supports and engages the bump foil segments. Each top foil segment and each bump foil segment is secured only along an edge portion which is trailing relative to the runner rotation leaving an edge which is leading relative to runner rotation and a pair of side edges unsecured. Each bump foil segment includes tabs separated by slots extending from the leading edge at least partially to the secured edge portion. Each bump foil tab has substantially parallel ridges separated by flats.

Keyless/grooveless foil bearing with fold over tab

An improved air foil bearing assembly is disclosed. The air foil bearing assembly includes a bearing housing having an axially extending bore therein and a shaft arranged within the bore for relative coaxial rotation with respect to the bearing housing. The shaft cooperates with the bearing housing to define an annular gap therebetween. A foil assembly is disposed in the annular gap, including at least one foil having at least one laterally extending tab. The tab is adapted to be received in and extend axially from the annular gap and is further adapted to be bent into frictional contact with an outer surface of the bearing housing to militate against axial movement of the foil.

FOIL BEARING

A foil bearing for supporting a shaft includes a sleeve-type bearing housing with three foil arrangements distributed around the inner circumference of the baring housing. Each foil arrangement covers a circumferential segment of the bearing housing. Each foil arrangement has a corrugated foil lying against an inner wall of the housing, and a top foil covering the corrugated foil. Each of the corrugated foil and the top foil has respective end edges. Each of the end edges are supported within the inner wall of the housing in a sliding manner. In particular, insertion grooves are formed in the inner surface of the housing which extend obliquely into the housing wall outwardly. The insertion grooves receive the end edges of the corrugated foil and the top foil. 1. A foil bearing for supporting a shaft , said bearing comprising: covering a circumferential segment of the bearing housing,', 'having a corrugated foil lying against an inner surface of the bearing housing; and', 'having a top foil covering said corrugated foil and having end edges delimiting the top foil in a circumferential direction, the end edges supported by the inner surface of the housing,, 'a sleeve-type bearing housing with three foil arrangements distributed around an inner circumference of the bearing housing, each foil arrangementwherein insertion grooves are formed in the inner surface of the housing, the grooves extending along surface lines and projecting obliquely outwardly into the housing, each of said grooves holding one of the end edges and one end edge of the associated corrugated foil, and wherein with a circular cross-sectional inner contour of the bearing housing the corrugated foils have corrugated heights that decrease starting from a respective central region in relation to the circumferential direction of the bearing housing towards their respective end edges.2. A foil bearing according to claim 1 , wherein the insertion grooves hold the end edges of the top foil and the end edges ...

RADIAL FOIL BEARING

The radial foil bearing includes: a top foil disposed facing a rotary shaft; an intermediate foil disposed outside of the top foil in the radial direction thereof; a back foil disposed outside of the intermediate foil in the radial direction; and a cylindrical bearing housing accommodating the top foil, the intermediate foil and the back foil. Engagement recesses are formed on both side surfaces of the bearing housing so as to be opposite to each other. The intermediate foil includes intermediate foil pieces disposed in the circumferential direction of the bearing housing. An engagement-projecting piece engaging with the engagement recess is formed in each intermediate foil piece. 1. A radial foil bearing used for supporting a rotary shaft so as to encircle the rotary shaft , the radial foil bearing comprising:a cylindrical top foil disposed so as to face the rotary shaft;an intermediate foil disposed outside of the top foil in a radial direction thereof;a back foil disposed outside of the intermediate foil in the radial direction; anda cylindrical bearing housing accommodating the top foil, the intermediate foil and the back foil,wherein a plurality of pairs of engagement recesses are formed in the bearing housing, each pair of engagement recesses are positioned on both side surfaces of the bearing housing so as to be opposite to each other, each engagement recess extends from an inner circumferential surface toward an outer circumferential surface of the bearing housing, and the plurality of pairs of engagement recesses are disposed in a circumferential direction of the bearing housing,wherein the intermediate foil includes intermediate foil pieces disposed in the circumferential direction of the bearing housing, andwherein an engagement-projecting piece engaging with the engagement recess is formed in each intermediate foil piece.2. The radial foil bearing according to claim 1 , wherein the back foil includes back foil pieces disposed in the circumferential ...

RADIAL FOIL BEARING

A radial foil bearing includes a bearing housing that has an insertion hole into which a shaft is inserted, a back foil that is disposed on an inner peripheral surface of the insertion hole, a lop foil that is supported by the back foil, and a protrusion portion that protrudes toward an inner side in a radial direction of the insertion hole from the inner peripheral surface of the insertion hole and is configured to allow supporting of the top foil. 1. A radial foil bearing comprising:a bearing housing that has an insertion hole into which a shaft is inserted;a back foil that is disposed on an inner peripheral surface of the insertion hole;a top foil that is supported by the back foil; anda protrusion portion that protrudes toward an inner side in a radial direction of the insertion hole front the inner peripheral surface of the insertion hole and is configured to allow supporting of the top foil.2. The radial foil bearing according to claim 1 ,wherein the back foil includes a hole portion to which the protrusion portion is fitted.3. The radial foil hearing according to claim 1 ,wherein the protrusion portion includes a top wall portion at a position in an axial direction within a range of ±5% from a middle position in the axial direction of the insertion hole.4. The radial foil hearing according to claim 1 ,wherein the protrusion portion is formed in a ring shape along a circumferential direction of the inner peripheral surface of the insertion hole.5. The radial foil bearing according to claim 1 ,wherein a plurality of the protrusion portions are formed with a gap along a circumferential direction of the inner peripheral surface of the insertion hole.6. The radial foil bearing according to claim 1 ,wherein the back foil includes a first back foil and a second back foil, which are separated in an axial direction of the insertion hole, andthe first back foil and the second back foil face each other in the axial direction with the protrusion portion interposed ...

FOIL JOURNAL BEARING APPLICABLE TO HIGH SPEED MACHINING CENTER

A foil journal bearing. A single foil engages an inner surface of and is mounted to the bearing housing. The single foil extends circumferentially of the inner surface and has a generally flat top foil portion and a bump foil portion which is disposed between the top foil portion and the inner surface of the housing. The bump foil portion comprises a plurality of circumferentially spaced ridges which engage the top foil portion and further comprises a plurality of generally flat portions between the ridges respectively and which engage the inner surface of the housing. 1. A foil journal bearing comprising:a hollow housing having an elongate generally cylindrical inner surface;a single foil which engages said inner surface and which is mounted to said housing;said single foil extending longitudinally of said inner surface and extending circumferentially of said inner surface and having a generally flat top foil portion and having a bump foil portion which is disposed between said top foil portion and said inner surface of said housing; andsaid bump foil portion comprising a plurality of circumferentially spaced ridges which engage said top foil portion and further comprising a plurality of generally flat portions between said ridges respectively and which engage said inner surface of said housing.2. The foil journal bearing of claim 1 , wherein said single foil has a portion which is mounted to said housing claim 1 , said mounted portion dividing said single foil into said bump foil portion and said top foil portion.3. The foil journal bearing of claim 1 , wherein said single foil has a portion which is mounted to said housing claim 1 , said mounted portion being located at an end of said single foil.4. The foil journal bearing of claim 1 , wherein said bump foil portion has a plurality of regions claim 1 , wherein each of said regions has a plurality of ridges separated by flat portions claim 1 , and wherein said regions are separated by extended flat portions such ...

FOIL BEARING WITH TRAILING EDGE KEY

A gas bearing within a cylinder is provided. The gas bearing comprises an anti-rotation tab sitting within a key way of the cylinder. Further, the gas bearing comprises a first foil forming an inner loop and an intermediary loop. The inner loop extends in a first direction from a first end to an intermediary portion. The intermediary loop extends from the intermediary to the anti-rotation tab. 1. A gas bearing within a cylinder , comprising:an anti-rotation tab sitting within a key way of the cylinder; anda first foil forming an inner loop and an intermediary loop,wherein the inner loop extends in a first direction from a first end to an intermediary portion; andwherein the intermediary loop extends from the intermediary portion to the anti-rotation tab.2. The gas bearing of claim 1 , wherein the anti-rotation tab is a trailing edge key.3. The gas bearing of claim 1 , wherein the inner loop is within an inner surface of the cylinder.4. The gas bearing of claim 3 , wherein the an intermediary foil is between the inner loop and the inner surface of the cylinder.5. The gas bearing of claim 1 , wherein the anti-rotation tab abuts a side of the key way.6. The gas bearing of claim 5 , wherein the anti-rotation tab resides between the side of the key way and a corrugated foil within the cylinder.7. The gas bearing of claim 1 , wherein the intermediate portion includes a dogleg bend that directs the intermediary loop between the inner loop and the inner surface of the cylinder.8. The gas bearing of claim 1 , wherein the intermediary loop extends along a radius to the anti-rotation tab.9. An air cycle machine comprising the gas bearing of . The present disclosure relates generally to a foil bearing with a trailing edge key, and more specifically, to a thin foil, hydrodynamic gas bearing comprising a trailing edge key to eliminate a foil fatigue failure.In general, thin foil, hydrostatic journal bearings are used to support a rotating element in rotating machinery such as air ...

Foil-air bearing assembly for engine starter

An air turbine starter that includes a turbine member for rotatably extracting mechanical power from a flow of fluid, where the turbine member is coupled to a drive shaft to provide a rotational output. The air turbine starter further includes a foil-air bearing assembly and a thrust bearing that rotatably support the drive shaft.

Radial foil bearing

The radial foil bearing (3, 3A, 3B) includes: a housing (12) provided with an insertion hole (12a), a pair of engagement grooves (15) extending outward in a radial direction from an inner peripheral edge of the insertion hole being provided in both end surfaces in an axial direction of the housing; a back foil (11) disposed on an inner circumferential surface of the insertion hole; an intermediate foil (10) supported by the back foil; and an engagement member (30) including a pair of engagement legs (31) engaging with the pair of engagement grooves, and a connection portion (32) connecting the pair of engagement legs. The intermediate foil is provided with a recess (10c) recessed and protruding toward the back foil, and the connection portion is disposed in the recess.

RADIAL FOIL BEARING

A radial foil bearing () that supports a rotating shaft (). This radial foil bearing () is provided with a top foil (), a back foil (), and a bearing housing () that houses them. A through-slot () is formed in the inner circumferential surface of the bearing housing (), and engagement slots () are formed in the through-slot () by a fixing tool (). 1. A radial foil bearing that , by being fitted on a rotating shaft , supports the rotating shaft , comprising:a cylindrical top foil that is arranged facing the rotating shaft; a back foil that is arranged on the outer side of the top foil in the radial direction; and a cylindrical bearing housing that houses the top foil and the back foil in the state of being inserted therein,wherein a through-slot that is continuous from one end to the other end along the axial direction is formed in the inner circumferential surface of the bearing housing;a fixing tool that forms a plurality of engagement slots by dividing the through-slot in the lengthwise direction is fitted in the through-slot;a regulating portion that regulates the movement of the fixing tool in the lengthwise direction of the through-slot is provided in the through-slot and the fixing tool;the top foil is formed by a metal foil that is rectangular and has a first uneven portion consisting of a convex portion and a concave portion on one side, and has a second uneven portion that forms a concave portion at a position corresponding to the convex portion of the first uneven portion and forms a convex portion at at least a portion of the position corresponding to the concave portion of the first uneven portion on the other side that is opposite the one side being wound into a cylindrical shape so that the first uneven portion and the second uneven portion overlap, and each convex portion in the first uneven portion and the second uneven portion passes through each respectively corresponding concave portion in the first uneven portion and the second uneven portion to ...

FOIL JOURNAL BEARING APPLICABLE TO HIGH SPEED MACHINING CENTER

A foil journal bearing applicable to high speed machining and grinding machines for machining microscopic features. A single foil is secured to and supported by a hollow, generally cylindrical, housing. The foil has a length substantially equal to twice the interior circumference of the housing and a mounting feature, extending across its width, for engagement with a feature of complementary shape in the housing. One portion of the foil has a length approximately equal to one half of the foil length, and comprises a bump foil and a plurality of regions comprising groups of generally uniformly-spaced ridges and flats, the regions being separated by extended flat regions. The other portion of the foil has a length approximately equal to one half of the foil length, and comprises the top foil and is generally flat and overlies the bump foil which overlies the interior of the housing. 1. A foil journal bearing comprising a plurality of top foils overlying a like number of bump foils , supported by a hollow , generally cylindrical housing with a length and a cylinder axis and an interior circumference , the bump foils comprising a plurality of ridges and flats oriented generally parallel to the cylinder axis;the top foils each having a length, a width generally equal to the length of the housing and two ends, the ends being unsecured, each top foil having a mounting feature, extending across its width, for engagement with one of a plurality of features of complementary shape in the housing;the number of complementary-shaped features in the housing being equal to the number of top foils;the complementary-shaped features being spaced-apart and uniformly distributed around the interior circumference of the housing;the mounting feature of each top foil being located between the ends of the top foil to divide the length of the top foil into a leading segment and a trailing segment;the lengths of the top foils being constructed to ensure that a portion of the leading segment ...

FOIL BEARING WITH SPLIT KEY

A gas bearing within a cylinder is provided. The gas bearing comprises an anti-rotation tab comprising a first side and a second side, the anti-rotation tab sitting within a key way of the cylinder. Further, the gas bearing also comprises a first foil extending in a first direction from a first end to the first side of the anti-rotation tab and a second foil extending in a second direction from a second end to the second side of the anti-rotation tab. 1. A gas bearing within a cylinder , comprising:an anti-rotation tab comprising a first side and a second side, the anti-rotation tab sitting within a key way of the cylinder;a first foil extending in a first direction from a first end to the first side of the anti-rotation tab; anda second foil extending in a second direction from a second end to the second side of the anti-rotation tab.2. The gas bearing of claim 1 , wherein the anti-rotation tab is a split key.3. The gas bearing of claim 1 , wherein the first foil is a first loop within an inner surface of the cylinder.4. The gas bearing of claim 3 , wherein the second foil is a second loop between the first foil and the inner surface of the cylinder.5. The gas bearing of claim 1 , wherein the second side of the anti-rotation tab abuts a side of the key way.6. The gas bearing of claim 1 , wherein the first side of the anti-rotation tab resides between the second side of the anti-rotation tab and a corrugated foil within the cylinder.7. The gas bearing of claim 1 , wherein the first foil extends along a radius in the first direction from an intermediary portion to the first side of the anti-rotation tab claim 1 ,wherein the radius is greater than a 180°.8. The gas bearing of claim 1 , wherein the second foil extends along a radius in the first direction from an intermediary portion to the second side of the anti-rotation tab claim 1 ,wherein the radius is greater than a 180°.9. The gas bearing of claim 1 , wherein the gas bearing is included in an air cycle machine. ...

Rotary machine air deflector

A rotary machine includes a shaft extending through the rotary machine; a bearing positioned around the shaft; and an air deflector mounted on the shaft between the bearing and the shaft, wherein the air deflector has a first cylindrical body portion that is connected to a second cylindrical body portion with a ramp portion. A method for cooling a bearing positioned around a rotating shaft includes providing air to a cavity that surrounds a rotating shaft; deflecting the air towards an inner surface of a bearing that is positioned radially outward of the rotating shaft, wherein the air is deflected with an air deflector that is mounted on the rotating shaft; and flowing the air between an outer surface of the air deflector and the inner surface of the bearing.

GAS BEARING AND METHOD FOR PRODUCING SAME

The invention relates to a gas bearing for contactlessly bearing a rotatable element (). The gas bearing comprises: a housing () having an opening for receiving the rotatable element; and at least two sliding films (), which are arranged on an interior () of the opening without overlap and which each have a first end portion () and a second end portion () for support on the housing (). The sliding films () are designed to radially support the rotatable element relative to the housing () only by means of the first and second end portions (), the second end portion () providing frictional contact with the interior () and the first end portion () being fastened to the housing. 1. A gas bearing for supporting a rotatable element in a contact-free manner , comprising:a housing having an opening for receiving the rotatable element; andat least two sliding foils arranged without overlap on an inner side of the opening and each having a first end portion and a second end portion for support on the housing,wherein the sliding foils are configured to radially support the rotatable element relative to the housing only through the first and second end portions, wherein the second end portion provides frictional contact with the inner side and the first end portion is secured to the housing.2. The gas bearing according to claim 1 , wherein at least one of the sliding foils is formed multilayered and the individual layers are attached to the housing on a same side or on opposite sides.3. A gas bearing for supporting a rotatable element in a contact-free manner claim 1 , having the following features:a housing having an opening for receiving the rotatable element; anda plurality of multilayered sliding foils, wherein each multilayered sliding foil is arranged without overlapping an adjacent multilayered sliding foil on an inner side of the opening, and the individual layers of the multilayered sliding foils are all fixed to the housing with a first end portion, and the opposite ...

RADIAL FOIL BEARING

A radial foil bearing includes a bearing housing which has an insertion hole through which a shaft is inserted, a back foil which is disposed on an inner peripheral surface of the insertion hole, and an engagement member which includes a first part and a second part, the first part being disposed to overlap the back foil in a radial direction of the insertion hole and engaged with the back foil, and the second part being attached to the bearing housing, in which the first part has an engagement groove which extends to an end edge of the first part in an axial direction of the insertion hole, and the back foil is disposed in the engagement groove. 1. A radial foil bearing comprising:a bearing housing which has an insertion hole through which a shaft is inserted;a back foil which is disposed on an inner peripheral surface of the insertion hole; andan engagement member which includes a first part and a second part, the first part being disposed to overlap the back foil in a radial direction of the insertion hole and engaged with the back foil, and the second part being attached to the bearing housing,wherein the first part has an engagement groove which extends to an end edge of the first part in an axial direction of the insertion hole, andthe back foil is disposed in the engagement groove.2. The radial foil bearing according to claim 1 ,wherein the back foil has crest portions and trough portions which are alternately formed in a circumferential direction of the inner peripheral surface of the insertion hole, andthe first part has a first claw portion and a second claw portion provided on opposing sides of the engagement groove with respect to each other, the first claw portion being disposed inside the trough portion in the radial direction, and the second claw portion being disposed outside the crest portion in the radial direction.3. The radial foil bearing according to claim 2 , further comprisingan intermediate foil which is supported by the back foil and has a ...

HIGH LOAD CAPACITY HYBRID FOIL BEARING

A bearing includes a bearing sleeve with a first portion and a second portion adjacent to the first portion. A bump foil extends along an inner face of the first portion of the bearing sleeve and a metal mesh extends along an inner face of the second portion of the bearing sleeve. A top foil extends along an inner face of the bump foil of the first portion and the metal mesh of the second portion. 1. A bearing comprising:a bearing sleeve with a first portion and a second portion adjacent to the first portion;a bump foil extending along an inner face of the first portion of the bearing sleeve;a metal mesh extending along an inner face of the second portion of the bearing sleeve; anda top foil extending along an inner face of the bump foil of the first portion and the metal mesh of the second portion.2. The bearing of claim 1 , and further comprising:a third portion in the bearing sleeve adjacent to the second portion; anda bump foil extending along an inner face of the third portion of the bearing sleeve;wherein the top foil extends along an inner face of the bump foil of the third portion.3. The bearing of claim 2 , wherein the bearing sleeve has a first wall thickness at the first portion and the third portion that is greater than a second wall thickness at the second portion.4. The bearing of claim 1 , and further comprising:a third portion in the bearing sleeve adjacent to the first portion; anda metal mesh extending along an inner face of the third portion of the bearing sleeve;wherein the top foil extends along an inner face of the metal mesh of the third portion.5. The bearing of claim 4 , wherein the bearing sleeve has a first wall thickness at the first portion and the third portion that is lesser than a second wall thickness at the second portion.6. The bearing of claim 1 , wherein the bump foil has a first section having corrugations with a first size and a second section having corrugations with a second size claim 1 , wherein the first size is larger ...

Hybrid Foil Bearings Having Integrated Gas Flow Paths

In one embodiment, a hybrid foil bearing includes a bearing sleeve, multiple inner foils provided within the sleeve, the foils having gas outlets from which pressurized gas can be injected into an interior of the bearing, and integrated gas flow paths that radially extend through the bearing sleeve and deliver the gas to the gas outlets. 1. A hybrid foil bearing comprising:a bearing sleeve;multiple inner foils provided within the sleeve, the foils having gas outlets from which pressurized gas can be injected into an interior of the bearing; andintegrated gas flow paths that radially extend through the bearing sleeve and deliver the gas to the gas outlets.2. The bearing of claim 1 , wherein the bearing sleeve comprises multiple gas inlets through which the pressurized gas can be delivered to the gas flow paths.3. The bearing of claim 2 , further comprising gas flow plugs provided in the gas inlets of the bearing sleeve through which the pressurized gas can flow.4. The bearing of claim 3 , further comprising flexible bellows connected to the gas flow plugs through which the pressurized gas can flow claim 3 , the bellows each comprising corrugations.5. The bearing of claim 4 , further comprising gas distribution members connected to the bellows and the foils through which the pressurized gas can flow to the gas outlets of the foils claim 4 , wherein each foil comprises multiple gas outlets and each gas distribution member distributes the gas to the multiple gas outlets of one foil.6. The bearing of claim 5 , wherein the gas distribution members are elongated and extend along a longitudinal direction of the bearing claim 5 , the gas distribution members each comprising an elongated inner channel through which the pressurized gas can flow.7. The bearing of claim 6 , wherein the bearing sleeve comprises multiple elongated channels that extend along the longitudinal direction of the bearing in which the gas distribution members are received.8. The bearing of claim 3 , ...

Rotor support structures including anisotropic foil bearings or anisotropic bearing housings and methods for controlling non-synchronous vibrations of rotating machinery using the same

Rotor support structures including anisotropic foil bearings or anisotropic bearing housings are provided for controlling non-synchronous vibrations of rotating machinery. The rotor support structure comprises a foil bearing adapted to be disposed around a journal of a rotating rotor shaft and a bearing housing disposed around the foil bearing, wherein one of the foil bearing or the bearing housing is configured to be anisotropic. The anisotropic foil bearing and anisotropic bearing housing exhibit a stiffness in a first support direction that varies in magnitude from that in a second support direction that is substantially orthogonal to the first support direction.

AIR FOIL BEARING AND COMPRESSOR INCLUDING THE SAME

An air foil bearing and a compressor including the same, may include a beam plate provided in a lower portion thereof; a shim sheet stacked on the beam plate, and partially covering a top surface of the beam plate; and a top foil stacked on the shim sheet, wherein one side of the beam plate is fixed, and the other side of the beam plate is movable in a vertical direction thereof. 1. An air foil bearing apparatus comprising:a beam plate provided in a predetermined portion of the air foil bearing,wherein a first side of the beam plate is stationary, andwherein a second side of the beam plate is movable with respect to the first side in an axial direction of the beam plate.2. The air foil bearing apparatus according to claim 1 , further including a shim sheet stacked on the beam plate claim 1 , and partially covering a top surface of the beam plate.3. The air foil bearing apparatus according to claim 2 , further including a top foil stacked on the shim sheet.4. The air foil bearing apparatus according to claim 3 ,wherein the shim sheet includes a plurality of shim sheets, andwherein the plurality of shim sheets is provided along a circumference of the top surface of the beam plate.5. The air foil bearing apparatus according to claim 3 ,wherein the beam plate has a circular outer circumference,wherein a through hole is formed in a central area of the beam plate, and a peripheral area forming the circular outer circumference of the beam plate, and extending in a circumferential direction of the beam plate;', 'a spaced area provided between the through hole and the peripheral area, and spaced from the peripheral area in a radial direction of the beam plate; and', 'a connection area connecting the peripheral area and the spaced area., 'wherein the beam plate further includes6. The air foil bearing apparatus according to claim 5 , wherein the shim sheet includes:a first area provided on the peripheral area of the beam plate;a second area connected to the first area, and ...

High strength foil journal bearing retainer

A journal foil bearing includes a bearing retainer having one slot configured to receive a top foil leading edge tab and another slot configured to receive a top foil trailing edge tab. A backup support structure, integral to the bearing retainer, extends between and is at least partially defined by the slots. The retainer is configured so that, during operation, the trailing edge tab further contacts, at an increased contact pressure, the support structure at a position close to the friction force, thereby minimizing top foil bending stress and improving bearing strength.

RADIAL FOIL BEARING

The present invention relates to a radial foil bearing for supporting a rotary shaft. The radial foil bearing includes a top foil, a back foil, and a bearing housing accommodating the top and back foils. The top foil is formed by winding a rectangular metal foil into a cylindrical shape so that one end of the metal foil is extended out in a tangential direction of a cylinder formed by the metal foil. An engagement groove is formed on an inner circumferential surface of the bearing housing in an axial direction of the bearing housing, and the engagement groove is formed so that a depth direction thereof corresponds to one tangential direction of the cylinder of the top foil. The one end of the top foil engages with the engagement groove. 1. A radial foil bearing for supporting a rotary shaft by being externally attached to the rotary shaft , the radial foil bearing comprising:a cylindrical top foil disposed so as to face the rotary shaft;a back foil disposed on a radially outer side of the top foil; anda cylindrical bearing housing accommodating the top foil and the back foil in an inside of the bearing housing,wherein the top foil is formed by winding a rectangular metal foil into a cylindrical shape so that one end of the metal foil is extended out in a tangential direction of a cylinder formed by the metal foil,wherein an engagement groove is formed on an inner circumferential surface of the bearing housing in an axial direction of the bearing housing,wherein the engagement groove is formed so that a depth direction thereof corresponds to one tangential direction of the cylinder of the top foil, andwherein the one end extending out in the tangential direction of the cylinder of the top foil engages with the engagement groove.2. The radial foil bearing according to claim 1 ,wherein a thin portion is formed in each of the one end and the other end opposite to the one end in the top foil, the thin portion being thinner than an intermediate portion between the one end ...

RADIAL FOIL BEARING

The radial foil bearing includes a top foil, a back foil, and a bearing housing accommodating the top and back foils, and supports a rotary shaft. Engagement grooves are formed on both side surfaces of the bearing housing to extend from the outer circumferential edge to the inner circumferential edge of the side surface. Notches are formed in circumferential edges on both sides of the back foil. A locking member is locked into the engagement grooves of the bearing housing and the notches of the back foil, and includes a pair of engagement legs engaging with the engagement grooves and the notches, and a connection portion connecting the engagement legs together to be disposed near one ends of the engagement legs. 1. A radial foil bearing for supporting a rotary shaft by being externally attached to the rotary shaft , the radial foil bearing comprising:a cylindrical top foil disposed so as to face the rotary shaft;a back foil disposed on a radially outer side of the top foil; anda cylindrical bearing housing accommodating the top foil and the back foil in a state of inserting the top foil and the back foil thereinto,wherein engagement grooves are formed on both side surfaces of the bearing housing so as to extend from an outer circumferential edge to an inner circumferential edge of the bearing housing,wherein notches are formed in circumferential edges on both sides of the back foil, andwherein a locking member is locked into the engagement grooves of the bearing housing and the notches of the back foil, and includes a pair of engagement legs engaging with the engagement grooves and the notches, and a connection portion connecting the engagement legs together so as to be disposed near one ends of the engagement legs.2. The radial foil bearing according to claim 1 ,wherein the back foil is a wave-like sheet in which valley portions contacting the bearing housing and peak portions contacting the top foil are alternately formed in a circumferential direction of the ...

RADIAL FOIL BEARING

The radial foil bearing () includes, a cylindrical top foil (), a back foil () disposed on a radially outer side of the top foil (), and a cylindrical bearing housing () accommodating the top foil () and the back foil (). The top foil () is formed by winding a rectangular metal foil around a rotary shaft () in a circumferential direction thereof. The metal foil includes a first uneven portion () which has a first projecting portion () and a first depressed portion () on a first side thereof, and a second uneven portion () which has a second projecting portion () and a second depressed portion () on a second side opposite to the first side. The metal foil is wound in a cylindrical shape so that the first uneven portion () and the second uneven portion () overlap with each other. The first projecting portion () and the second projecting portion () are pulled out near the bearing housing () through the second depressed portion () and the first depressed portion () respectively, and engage with engagement grooves () formed on the inner circumferential surface of the bearing housing (). 1. A radial foil bearing for enclosing and supporting a rotary shaft , the radial foil bearing comprising:a cylindrical top foil disposed so as to face the rotary shaft;a back foil disposed on a radially outer side of the top foil; anda cylindrical bearing housing accommodating the top foil and the back foil,wherein engagement grooves are formed on an inner circumferential surface of the bearing housing in an axial direction of the bearing housing,wherein the top foil is formed by winding a rectangular metal foil around the rotary shaft in a circumferential direction thereof,wherein the metal foil includes a first uneven portion which has a first projecting portion and a first depressed portion on a first side of the metal foil, and a second uneven portion which has a second depressed portion formed so as to include a position corresponding to the first projecting portion and a second ...

METHOD FOR PRODUCING A CORRUGATED FOIL BEARING STIFFENER AND OBTAINED STIFFENER

A method for producing a corrugated foil bearing stiffener involves starting with an austenitic nickel superalloy sheet () having an elasticity limit higher than 500 MPa, and subjecting the sheet () to at least one step of press bending plastic deformation of the entire thickness of same with a deformation energy higher than 10 kJ in a time shorter than 10s in such a way as to create corrugations. 1. A method for producing a corrugated foil-bearing stiffener , in which:{'b': '15', 'the starting-point is a sheet () consisting of nickel-based austenitic metallic superalloy,'}{'b': '15', 'the sheet () is plastically deformed in order to impart thereto the shape of the corrugated stiffener, wherein{'b': '15', 'a sheet () is chosen consisting of nickel-based austenitic superalloy exhibiting a yield strength greater than 500 MPa,'}{'b': '15', 'sup': '−5', 'the sheet () is subjected to at least one step of plastic flexural deformation by stamping along its entire thickness with a deformation energy greater than 10 kJ within a period shorter than 10s, so as to create flexural corrugations.'}215. The method as claimed in claim 1 , wherein a sheet () is chosen consisting of superalloy exhibiting a yield strength greater than 700 MPa claim 1 , a tensile strength greater than 1000 MPa claim 1 , and an elongation at break greater than 20%.315. The method as claimed in claim 1 , wherein a sheet () is chosen consisting of superalloy comprising between 5% and 9% iron claim 1 , more than 70% nickel and cobalt claim 1 , of which at most 1% is cobalt claim 1 , between 14% and 17% chromium.4. The method as claimed in claim 3 , wherein a superalloy is chosen including claim 3 , in addition claim 3 , less than 0.08% carbon claim 3 , less than 0.3% manganese claim 3 , less than 0.5% silicon claim 3 , less than 0.01% sulfur claim 3 , between 0.4% and 1% aluminum claim 3 , between 2.25% and 2.70% titanium claim 3 , less than 0.5% copper claim 3 , and between 0.7% and 1.2% niobium and ...

FOIL BEARING

Particles () are supplied to a bearing gap of a foil bearing. A step () is formed in a top foil portion (), to thereby generate an air flow from both end portions ( and ) in a direction (N) along a surface of the top foil portion () and orthogonal to a rotation direction (R) of a shaft () toward a region between the both end portions. 1. A foil bearing , comprising:a top foil portion having a bearing surface which forms a bearing gap with a shaft to be supported; anda support portion, which is arranged on a back side of the top foil portion, and is configured to elastically support the top foil portion,wherein the foil bearing is configured to support relative rotation of the shaft in a non-contact state with fluid pressure generated in the bearing gap,wherein particles are supplied to the bearing gap, andwherein the top foil portion comprises a fluid control portion which is configured to generate a fluid flow from both end portions of the top foil portion in a direction along a surface of the top foil portion and orthogonal to the relative rotation direction toward a region between the both end portions.2. The foil bearing according to claim 1 , wherein the fluid control portion is formed of a step in a width direction of the bearing gap.3. The foil bearing according to claim 2 , wherein the step is formed by elastically deforming the top foil portion in conformity with a shape of the support portion.4. The foil bearing according to claim 1 ,wherein foils are arranged at a plurality of positions in the relative rotation direction,wherein the foils each have the top foil portion and an under-foil portion configured to support an adjacent top foil portion from a back side, andwherein the support portion is formed of the under-foil portion.5. The foil bearing according to claim 4 , wherein a cutout portion which is recessed in the relative rotation direction is formed at a rear end of the under-foil portion.6. A foil bearing claim 4 , comprising:a top foil portion ...

FLUID MACHINE

A fluid machine includes a rotary shaft, an operation body configured to discharge fluid by rotation of the rotary shaft, a housing accommodating the rotary shaft and the operation body, and a foil bearing disposed in the housing rotatably supporting the rotary shaft. The foil bearing includes a cylindrical bearing housing, a top foil between the bearing housing and the rotary shaft, and a bump foil between the bearing housing and the top foil and elastically supporting the top foil. The bearing housing has a protrusion protruding inwardly in a radial direction from the bearing housing. The protrusion includes an abutment surface configured to restrict deformation of the bump foil to an elastic range not to reach a plastic range by abutting against the top foil or the bump foil when the top foil is displaced outwardly in the radial direction of the bearing housing. 1. A fluid machine , comprising:a rotary shaft;an operation body configured to discharge fluid by rotation of the rotary shaft;a housing accommodating the rotary shaft and the operation body; and{'claim-text': ['a bearing housing having a cylindrical shape;', 'a top foil disposed between an inner peripheral surface of the bearing housing and the rotary shaft; and', 'a bump foil disposed between the inner peripheral surface of the bearing housing and the top foil and elastically supporting the top foil, wherein'], '#text': 'a foil bearing disposed in the housing and rotatably supporting the rotary shaft, the foil bearing including:'}the bearing housing has a protrusion that protrudes inwardly in a radial direction of the bearing housing from the inner peripheral surface of the bearing housing, andthe protrusion includes an abutment surface configured to restrict deformation of the bump foil to an elastic range so as not to reach a plastic range by abutting against an outer surface of the top foil or an outer surface of the bump foil when the top foil is displaced outwardly in the radial direction of the ...

JOURNAL AIR BEARING WITH AIR-FILM-SUPPLY VENT

A journal air bearing is provided. The bearing includes a top foil configured to receive the shaft, an intermediate foil disposed radially outboard the top foil, and a journal sleeve disposed radially outboard the intermediate foil. The intermediate foil defines a plurality of holes configured to act as a vent to communicate fluid to an increased supply area to an air film. 1. A journal air bearing for a rotatable shaft comprising:a top foil configured to receive the shaft;an intermediate foil disposed radially outboard the top foil; anda journal sleeve disposed radially outboard the intermediate foil, wherein the intermediate foil defines a plurality of holes configured to act as a vent to communicate fluid to an increased supply area to an air film.2. The journal air bearing of claim 1 , wherein the bearing comprises further a formed key extending radially relative to the shaft and the holes are disposed slightly offset with the key.3. The journal air bearing of claim 1 , wherein the bearing comprises further a bump foil disposed radially inboard the sleeve and adapted to bias at least a portion of the top foil against an outer surface of the shaft and provide a path for communicating the fluid from between the top and intermediate foils and the intermediate and bump foils.4. The journal air bearing of claim 1 , wherein the holes are disposed in a row that extends from one edge of the intermediate foil to another edge of the intermediate foil.5. The journal air bearing of claim 1 , wherein the row of holes is parallel with a rotational axis of the shaft claim 1 , the holes are linearly spaced from each other claim 1 , and end ones of the holes are spaced from respective edges of the intermediate foil.6. The journal air bearing of claim 1 , wherein the rotatable shaft is disposed within an air-cycle machine of an aircraft.7. The journal air bearing of claim 1 , wherein the top foil is joined to the intermediate foil.8. An air-cycle machine of an aircraft comprising ...

RADIAL FOIL BEARING

The radial foil bearing () for supporting a rotary shaft () includes a cylindrical top foil () disposed to face the rotary shaft (), a back foil () disposed on a radially outer side of the top foil (), and a cylindrical bearing housing () accommodating the top foil () and the back foil (). The back foil () is formed in a cylindrical shape using at least one back foil piece (). The back foil piece () includes peak portions () and valley portions () which are alternately formed in a circumferential direction of the top foil () and is fixed to the bearing housing () at an intermediate portion between both end portions in a circumferential direction of the back foil piece. 1. A radial foil bearing for enclosing and supporting a rotary shaft , the radial foil bearing comprising:a cylindrical top foil disposed so as to face the rotary shaft;a back foil disposed on a radially outer side of the top foil; anda cylindrical bearing housing accommodating the top foil and the back foil,wherein the back foil is formed in a cylindrical shape using at least one back foil piece, andwherein the back foil piece includes peak portions and valley portions which are alternately formed in a circumferential direction of the top foil and is fixed to the bearing housing at an intermediate portion between both end portions in a circumferential direction of the back foil piece.2. The radial foil bearing according to claim 1 ,wherein the back foil is formed in a cylindrical shape using back foil pieces which are disposed in line in the circumferential direction of the top foil.3. The radial foil bearing according to claim 1 ,wherein the back foil piece is fixed to the bearing housing spot welding. The present invention relates to a radial foil bearing.Priority is claimed on Japanese Patent Application No. 2011-176757, filed Aug. 12, 2011, the contents of which are incorporated herein by reference.In the related art, as a bearing for a high-speed rotating body, a radial bearing which is used in ...

Air Foil Bearings Having Multiple Pads

In one embodiment, an air foil bearing includes an outer bearing sleeve and multiple inner pads provided within the bearing sleeve, each pad including a top foil and an inner elastic structure that supports the top foil within the bearing sleeve, wherein each pad has an offset ratio that is greater than 0.5. 1. An air foil bearing comprising:an outer bearing sleeve; andmultiple inner pads provided within the bearing sleeve, each pad including a top foil and an inner elastic structure that supports the top foil within the bearing sleeve, wherein each pad has an offset ratio that is greater than 0.5.2. The air foil bearing of claim 1 , wherein the bearing comprises only two inner pads.3. The air foil bearing of claim 2 , wherein the pads each have an offset ratio of greater than 0.5 but less than 0.7.4. The air foil bearing of claim 2 , wherein the pads each have an offset ratio of greater than 0.7.5. The air foil bearing of claim 1 , wherein the bearing comprises three or more inner pads.6. The air foil bearing of claim 1 , wherein the inner elastic structure comprises an inner bump foil that is attached to an inner surface of the outer bearing sleeve.7. The air foil bearing of claim 6 , wherein each pad comprises two bump foils that support their associated top foil.8. The air foil bearing of claim 1 , wherein each top foil has a leading edge and a trailing edge and wherein the trailing edges are connected to the bearing sleeve.9. The air foil bearing of claim 8 , wherein the leading edges of the top foils are closer to the outer bearing sleeve than the trailing edges of the top foils.10. The air foil bearing of claim 8 , wherein the trailing edges of the top foils extend into slots formed in the outer bearing sleeve.11. The air foil bearing of claim 10 , wherein the trailing edges of the top foils are spot welded in place within the slots.12. The air foil bearing of claim 10 , wherein the trailing edges of the top foils are not secured within the slots so that the ...

FOIL BEARING

Provided is a foil bearing, an air film is formed in a radial bearing gap between a first bearing surface arranged on a top foil and a second bearing surface along with rotation of a shaft, and the shaft is supported with a pressure of the air film. Lubricating powder is interposed between the bearing surfaces. The top foil is partially elastically deformed in a width direction of the radial bearing gap in accordance with the pressure of the air film generated in the radial bearing gap, thereby being alternately shifted between a first state in which a retaining portion capable of retaining the lubricating powder is formed and a second state in which the retaining portion substantially disappears, and shifted from the second state to the first state along with an increase in the pressure of the air film. 1. A foil bearing , comprising:a stationary side member; and a top foil formed of a flexible metal thin plate; and', 'an elastic support portion configured to elastically support the top foil,, 'a rotary side member, any one of the stationary side member and the rotary side member comprisinga first bearing surface arranged on the top foil,a second bearing surface of another member opposed to the first bearing surface,an air film formed in a bearing gap between the first bearing surface and the second bearing surface along with rotation of the rotary side member,the rotary side member supported with a pressure of the air film, andpowder having lubricity and being interposed between the first bearing surface and the second bearing surface,wherein at least a part of the top foil is elastically deformed in a width direction of the bearing gap in accordance with the pressure of the air film to be shifted alternately between a first state in which a retaining portion capable of retaining the powder is formed and a second state in which the retaining portion substantially disappears, and shifted from the second state to the first state along with an increase in the ...

BEARING ASSEMBLY WITH SURFACE LAYER

A bearing assembly is disclosed that includes a first component with a first bearing surface, and a second component with a second bearing surface. A fluid is disposed between the first bearing surface and the second bearing surface supporting the first bearing surface and the second bearing surface in a non-contact rotational relationship. The first bearing surface, or the second bearing surface, or both the first bearing surface and the second bearing surface include a surface layer with solid lubricant 2D nanoparticles in a matrix.

COMPLIANT FOIL RADIAL BEARING

A compliant foil radial bearing () comprising: a bushing () comprising a bore defined therethrough; a spring foil () arranged to conform to a radially inner surface of the bushing; a fluid foil () arranged to conform to a radially inner surface of the spring foil for rotatably receiving a rotor, wherein: the radially inner surface of the bore comprises a plurality of axially oriented pads arranged around the circumference thereof. 1. A compliant foil radial bearing comprising:a bushing comprising a bore defined therethrough;a spring foil arranged to conform to a radially inner surface of the bore;a fluid foil arranged to conform to a radially inner surface of the spring foil for rotatable receiving a rotor, wherein:the radially inner surface of the bore comprises a plurality of axially oriented pads arranged around the circumference thereof.2. The compliant foil radial bearing according to claim 1 , wherein:the spring foil comprises a plurality of axially oriented loops arranged to fit within axial grooves formed between adjacent pads.3. The compliant foil radial bearing according to claim 2 , wherein:the loops and grooves are arranged thereby to define a clearance between a radially outer portion of the loops and a radially outer portion of the grooves.4. The compliant foil radial bearing according to claim 2 , wherein:the circumferential width of each groove decreases in a radially inward direction.5. The compliant foil radial bearing according to claim 1 , wherein:each pad comprises a radially inner surface arranged to support the spring foil between circumferentially spaced axially oriented contact regions formed by contact between the radially inner surface and the spring foil.6. The compliant foil radial bearing according to claim 5 , wherein:the contact regions comprise a plurality of axially-spaced contact points in the axial direction.7. The compliant foil radial bearing according to claim 5 , wherein:the contact regions comprise a continuous line contact ...

JOURNAL FOIL AIR BEARING

A journal foil air beating includes: a top foil located to face an outer circumferential surface of a rotating shaft and surround the rotating shaft; a bump foil being an elastically deformable member and located to surround the top foil; a base foil located to surround the bump foil, and a coupling unit configured to couple the first end portion of the top foil, the first end portion of the bump foil, the first end portion of the base foil, and the second end portion of the base foil, wherein the base foil, the bump foil, and the top foil are modularized into one piece by the coupling unit. According to the present invention, the journal foil air bearing may be easily assembled in advance and modularized into one piece, may be very conveniently mounted or disassembled on a bearing housing in a workplace. 1. A journal foil air bearing for supporting a load applied in a radial direction of a rotating shaft that rotates about a central line , the journal foil air bearing comprising:a top foil located to face an outer circumferential surface of the rotating shaft and surround the rotating shaft;a bump foil being an elastically deformable member and located to surround the top foil; anda base foil located to surround the bump foil,wherein a first end portion of the top foil and a first end portion of the bump foil are located between a first end portion of the base foil and a second end portion of the base foil,wherein the journal foil air bearing further comprises a coupling unit configured to couple the first end portion of the top foil, the first end portion of the bump foil, the first end portion of the base foil, and the second end portion of the base foil,wherein the base foil, the bump foil, and the top foil are modularized into one piece by coupling unit and then the one piece is mounted.2. The journal foil air bearing of claim 1 , wherein a receiving portion in which the first end portion of the top foil claim 1 , the first end portion of the bump foil claim 1 ...

Turbine thrust shaft for air bearing cooling

A turbine thrust shaft providing a thrust disk having a surface P and a surface Q, and a shaft body formed through the thrust disk, the shaft body including a first plurality of holes, wherein the first plurality of holes are spaced apart and each hole of the first plurality of holes has a first diameter between 0.0600 inches to 0.0680 inches and has a first center disposed a first distance between 0.1400 inches to 0.1600 inches from surface P, and a second plurality of holes wherein the second plurality of holes are spaced apart and each hole of the second plurality of holes has a second diameter between 0.0960 inches to 0.1040 inches and has a second center disposed a second distance between 2.1350 inches to 2.1550 inches from surface Q.

ELECTROMAGNETICALLY ENABLED ACTIVE DYNAMIC PRESSURE GAS BEARING

An electromagnetically enabled active dynamic pressure gas bearing is provided and includes an electromagnetic bearing and an elastic foil bearing sleeved between the electromagnetic bearing and a rotor shaft. The elastic foil bearing includes a top layer elastic foil and a bottom layer elastic foil, the top layer elastic foil is made of non-magnetic material, and a plurality of separate magnetic material areas are distributed on a surface of the top layer elastic foil. 1. An electromagnetically enabled active dynamic pressure gas bearing , comprising an electromagnetic bearing and an elastic foil bearing sleeved between the electromagnetic bearing and a rotor shaft;wherein the elastic foil bearing comprises a top layer elastic foil and a bottom layer elastic foil, and wherein the top layer elastic foil is made of non-magnetic material, and a plurality of separate magnetic material areas are distributed on a surface of the top layer elastic foil.27-. (canceled)8. The electromagnetically enabled active dynamic pressure gas bearing according to claim 1 , wherein the magnetic material areas are strip-shaped magnetic material areas or dotted magnetic material areas claim 1 , the strip-shaped magnetic material areas or the dotted magnetic material areas are uniformly distributed and a length direction of the strip-shaped magnetic material areas is parallel to a direction of an axis of the rotor shaft.9. The electromagnetically enabled active dynamic pressure gas bearing according to claim 1 , wherein the top layer elastic foil is a flat foil and the bottom layer elastic foil is a waved foil claim 1 , the flat foil is made of stainless steel band which is a non-magnetic material claim 1 , and after the separate magnetic material areas are sprayed on the surface of the top layer elastic foil claim 1 , the surface of the top layer elastic foil is covered by a ceramic coating.10. The electromagnetically enabled active dynamic pressure gas bearing according claim 1 , further ...

FOIL BEARING

The invention relates to a foil bearing () having at least one foil (), which is arranged and fixed in place inside a bearing bushing (). In order to simply the production, in particular assembly, of the foil bearing (), the bearing bushing () has at least two openings () offset from each other in the circumferential direction of the bearing bushing () or depressions () made in the inner lateral surface of the bearing bushing, into which openings or depressions two opposing circumferential end sections () of the at least one foil () engage. 1101618121220222412120122124161618181618abab. A foil bearing () having at least one foil ( , ) , which is arranged and fixed inside a bearing bushing () , characterized in that the bearing bushing () has at least two openings ( , , ) arranged offset with respect to one another in a circumferential direction of the bearing bushing () , or has at least two depressions ( , , ) made in an inner lateral surface of the bearing bushing , into which openings or depressions two opposite circumferential end sections ( , , , ) of the at least one foil ( , ) engage.220221201221412. The foil bearing as claimed in claim 1 , characterized in that at least two openings ( claim 1 , ) or depressions ( claim 1 , ) are arranged offset with respect to one another in a direction of a longitudinal axis () of the bearing bushing ().320222412012212420120141222122201202412420221201221412. The foil bearing as claimed in claim 2 , wherein the at least two openings include a first opening () claim 2 , a second opening () and a third opening () claim 2 , wherein the at least two depressions include a first depression () claim 2 , a second depression () and a third depression () claim 2 , wherein claim 2 , in a first circumferential position claim 2 , the first opening () or the first depression () is provided claim 2 , and claim 2 , in the direction of the longitudinal axis () of the bearing bushing () claim 2 , the second opening () or the second depression ...

COMPLIANT FOIL THRUST BEARING

A compliant foil thrust bearing subassembly comprising: a fluid plate comprising an annular mating ring and a plurality of fluid foil elements disposed radially inwardly from the fluid plate mating ring; a force transfer plate comprising an annular mating ring and a plurality of force transfer elements disposed radially inwardly from the force transfer plate mating ring; and a spring plate comprising an annular mating ring and a plurality of deflection elements disposed radially inwardly from the spring plate mating ring, wherein: the fluid plate, the force transfer plate and the spring plate are stackable such that each fluid foil element is axially supported by a corresponding pair of overlapping force transfer elements and deflection elements. 1. A compliant foil thrust bearing subassembly comprising:a fluid plate comprising an annular mating ring and a plurality of fluid foil elements disposed radially inwardly from the fluid plate mating ring;a force transfer plate comprising an annular mating ring and a plurality of force transfer elements disposed radially inwardly from the force transfer plate mating ring; anda spring plate comprising an annular mating ring and a plurality of deflection elements disposed radially inwardly from the spring plate mating ring, wherein:the fluid plate, the force transfer plate and the spring plate are stackable such that each fluid foil element is axially supported by a corresponding pair of overlapping force transfer elements and deflection elements.2. The compliant foil thrust bearing subassembly according to claim 1 , wherein: the force transfer elements comprise axial through-holes.3. The complaint foil thrust bearing subassembly according to claim 2 , wherein:the deflection elements comprise portions arranged to overlap with the axial through-holes of corresponding force transfer elements.4. The complaint foil thrust bearing subassembly according to claim 3 , wherein:the deflection elements comprise radially extending ...

Radial foil bearing

The radial foil bearing (3, 3A, 3B, 3D) includes: a wave sheet-shaped back foil (11); and an intermediate foil (10) supported by the back foil, and the intermediate foil includes a flat portion (10b) facing a hill part (11c) of a wave sheet shape of the back foil, and a protruding part (39, 40, 40a, 40b, 40B) protruding toward the back foil via branching at a position in a circumferential direction between a top of at least one hill part and a top of a hill part adjacent to the one hill part in the wave sheet shape of the back foil.

RADIAL FOIL BEARING

This relates to a radial foil bearing () that supports a rotating shaft (). The radial foil bearing () is provided with a top foil (), a back foil (), and a bearing housing () that houses them. An engagement notch () that extends from the inner circumferential edge to the outer circumferential edge of the bearing housing () is formed at both sides of the bearing housing (). An engagement protruding piece () that engages with each engagement notch () is provided at both side end portions of the back foil () on one side in the circumferential direction of the bearing housing (). 1. A radial foil bearing that , by being fitted on a rotating shaft , supports the rotating shaft , comprising:a cylindrical top foil that is arranged facing the rotating shaft;a back foil that is arranged on the outer side of the top foil in the radial direction; anda cylindrical bearing housing that houses the top foil and the back foil in the state of being inserted therein,wherein, an engagement notch that extends from the inner circumferential edge to the outer circumferential edge of the bearing housing is formed at both sides of the bearing housing, and an engagement protruding piece that engages with each engagement notch is provided at both side end portions of the back foil on one side in the circumferential direction of the bearing housing.2. The radial foil bearing according to claim 1 , whereinthe back foil is constituted having a plurality of back foil pieces that are arranged along the circumferential direction of the bearing housing; andthe engagement protruding piece is formed on each of the back foil pieces.3. The radial foil bearing according to claim 2 , whereina mutually adjacent pair of back foil pieces among the back foil pieces are arranged in a state of their respective engagement protruding pieces being contiguous, and the contiguous pair of engagement protruding pieces are engaged in one engagement notch.4. The radial foil bearing according to claim 1 , whereinan ...

COMPRESSOR

A compressor includes a shaft extending in axial directions thereof, an impeller secured to one end of the shaft, a first bearing action member provided at the one end of the shaft, a second bearing action member provided at an opposite end of the shaft that is opposite to the one end of the shaft, a first bearing that acts on the first bearing action member and supports the first bearing action member in one axial direction of the axial directions and in a radially inward direction of the shaft, and a second bearing that acts on the second bearing action member and supports the second bearing action member in another axial direction, which is opposite to the one axial direction, and in the radially inward direction of the shaft. 1. A compressor comprising:a shaft extending in axial directions thereof;an impeller secured to one end of the shaft;a first bearing action member provided at the one end of the shaft;a second bearing action member provided at an opposite end of the shaft that is opposite to the one end of the shaft;a first bearing configured to act on the first bearing action member and support the first bearing action member in one axial direction of the axial directions and in a radially inward direction of the shaft; anda second bearing configured to act on the second bearing action member and support the second bearing action member in another axial direction of the axial directions, which is opposite to the one axial direction, and in the radially inward direction of the shaft.2. The compressor of claim 1 , wherein the first bearing action member has a rotating body shape with a gradually decreasing diameter from the one end of the shaft to a center of the shaft and includes a first action surface with a tapered shape on which the first bearing acts claim 1 , andwherein the second bearing action member has a rotating body shape with a gradually decreasing diameter from the opposite end of the shaft to the center of the shaft and includes a second ...

ELECTROMAGNETIC ACTUATING DEVICE AND METHOD FOR MANUFACTURING AN ELECTROMAGNETIC ACTUATING DEVICE

An electromagnetic actuating device. The device includes an electromagnetic coil including a central recess extending in an axial direction, a cylindrical pole tube inserted into the central recess and provided with a magnetic separation point, an armature situated displaceably in the pole tube, the armature being movable by an actuation of the electromagnetic coil, the armature being mounted in the pole tube in a sleeve-shaped bearing foil inserted into the pole tube, the bearing foil including an inner side facing toward the armature and used as a sliding surface and an outer side facing toward the cylindrical pole tube. It is provided that the bearing foil is coated at least on the inner side using a first layer made of perfluoroalkoxy polymer. A manufacturing method for such an electromagnetic actuating device is also described. 1. An electromagnetic actuating device , comprising:an electromagnetic coil including a central recess extending in an axial direction;a cylindrical pole tube inserted into the central recess and provided with a magnetic separation point; andan armature situated displaceably in the pole tube, the armature being movable by an actuation of the electromagnetic coil, the armature being mounted in the pole tube in a sleeve-shaped bearing foil inserted into the pole tube, the bearing foil including an inner side facing toward the armature and used as a sliding surface, and an outer side facing toward the cylindrical pole tube, wherein the bearing foil is coated at least on the inner side using a first layer made of perfluoroalkoxy polymer.2. The electromagnetic actuating device as recited in claim 1 , wherein the sleeve-shaped bearing foil is additionally coated on the outer side using a second layer made of a perfluoroalkoxy polymer.3. The electromagnetic actuating device as recited in claim 1 , wherein the sleeve-shaped bearing foil includes a glass fiber fabric saturated using PTFE as a carrier material claim 1 , which is provided on the ...

FOIL BEARING

The invention relates to a foil bearing () having at least one foil () which is arranged and fixed in place inside a bearing bore () of a bearing support (). The bearing support () is made of aluminum or an aluminum alloy, wherein the surface of the bearing bore () is provided at least in one contact region () of the at least one foil () with a hard material layer (). The bearing support () can be produced in a simple and cost-effective manner, has a low weight and a good thermal conductivity. 1101618141212. A foil bearing () having at least one foil ( , ) , which is arranged within a bearing bore () of a bearing receptacle () and fixed therein , characterized in that the bearing receptacle () is produced from aluminum or an aluminum alloy.2141226201618. The foil bearing as claimed in claim 1 , characterized in that a surface of the bearing bore () of the bearing receptacle () is provided with a hard-material layer () at least in a region () of contact with the at least one foil ( claim 1 , ).3261412. The foil bearing as claimed in claim 2 , characterized in that the hard-material layer () is formed by anodizing the surface of the bearing bore () of the bearing receptacle ().426. The foil bearing as claimed in claim 3 , characterized in that the hard-material layer () is formed from titanium nitrite.51228. The foil bearing as claimed in claim 1 , characterized in that the bearing receptacle () is part of a housing part () of a compressor.612. The foil bearing as claimed in claim 1 , characterized in that the bearing receptacle () is in the form of a bearing sleeve.710181618141614. The foil bearing as claimed in claim lone of the preceding claims claim 1 , characterized in that the foil bearing () comprises at least one top foil () and one bottom foil () claim 1 , which is arranged between the top foil () and the bearing bore () claim 1 , and in that wherein at least the bottom foil () bears against the bearing bore ().812. The foil bearing as claimed in claim 1 , ...

RADIAL FOIL BEARING

The radial foil bearing includes: a top foil; an intermediate foil; a back foil; and a bearing housing accommodating the top foil the intermediate foil and the back foil. The top foil is formed by winding a rectangular metal foil which includes a first uneven portion and a second uneven portion, into a cylindrical shape so as to overlap the first and second uneven portions with each other, wherein the first uneven portion is composed of a projecting portion and a depressed portion formed on one edge of the metal toil, and the second uneven portion is composed of a depressed portion, and a projecting portion formed on another edge of the metal foil. The projecting portions of the first and second uneven portions pulled out near the bearing housing engage with engagement grooves of the hearing housing. 1. A radial foil bearing used for supporting a rotary shaft so as to encircle the rotary shaft , the radial foil bearing comprising:a cylindrical top foil disposed so as to face the rotary shaft;an intermediate foil disposed outside of the top foil in a radial direction thereof;a back foil disposed outside of the intermediate foil in the radial direction; anda cylindrical bearing housing accommodating the top foil, the intermediate foil and the back foil,wherein engagement grooves are formed on an inner circumferential surface of the bearing housing in an axial direction thereof,the top foil is formed by winding a rectangular metal foil which includes a first uneven portion and a second uneven portion, into a cylindrical shape so as to overlap the first and second uneven portions with each other, the first uneven portion being composed of a projecting portion and a depressed portion formed on one edge of the metal foil, the second uneven portion being composed of a depressed portion and a projecting portion formed on another edge of the metal foil opposite to the one edge,the projecting portion of the first uneven portion is disposed so as to be pulled out near the ...

RADIAL FOIL BEARING

The radial foil bearing for surrounding and supporting a rotary shaft includes a cylindrical top foil disposed so as to face the rotary shaft, a back foil disposed at a radially outer side of the top foil, and a cylindrical bearing housing accommodating the top foil and the back foil. Engagement-projecting portions are provided on both ends of an inner circumferential surface of the bearing housing. Engagement notches engaging with the engagement-projecting portions are formed on both ends of the back foil. 1. A radial foil bearing for surrounding and supporting a rotary shaft , the radial foil bearing comprising:a cylindrical top foil disposed so as to face the rotary shaft;a back foil disposed at a radially outer side of the top foil; anda cylindrical bearing housing accommodating the top foil and the back foil,wherein engagement-projecting portions are provided on both ends of an inner circumferential surface of the bearing housing, andengagement notches engaging with the engagement-projecting portions are formed on both ends of the back foil.2. The radial foil bearing according to claim 1 ,wherein engagement-depressed portions, which extend from the inner circumferential surface of the bearing housing toward an outer circumferential surface thereof, are formed on both side surfaces of the bearing housing so as to be opposite to each other,an engagement groove is formed on the inner circumferential surface of the bearing housing between the engagement-depressed portions opposite to each other, wherein the engagement groove communicates with the engagement-depressed portions and a depth of the engagement groove toward the outer circumferential surface of the bearing housing is less than that of the engagement-depressed portions,a locking member is locked into the engagement-depressed portions and the engagement groove,the locking member includes a pair of engagement arms which engage with the engagement-depressed portions and a connection portion which engages ...

AIR FOIL JOURNAL BEARING

The present invention relates to an air foil journal bearing including a bearing housing having a hollow, in which a rotor is arranged, and a pair of top foils with different lengths formed inside the hollow, thereby enhancing assemblability since the lengths are reduced and increasing stability at the time of high speed rotation through position adjustment of a slot to which the top foils are inserted. 1. An air foil journal bearing comprising:a pair of top foils formed inside a hollow of a bearing housing in which a rotor is arranged,wherein a pair of the top foils have different lengths.2. The air foil journal bearing according to claim 1 , wherein the top foils are a first top foil and a second top foil claim 1 , which is shorter than the first top foil claim 1 , andwherein the bearing housing includes a pair of slots to which end portions of the top foils are inserted.3. The air foil journal bearing according to claim 2 , wherein the slots are a first slot and a second slot claim 2 , andwherein the first top foil and the second top foil respectively have bent portions inserted into the first and second slots.4. The air foil journal bearing according to claim 3 , wherein the first slot is formed in the opposite direction to load of the rotor from the bearing housing claim 3 , andwherein the second slot is formed in the direction opposite to the direction of load and the rotation of the rotor in the bearing housing, and an angle (B) formed between a line in a downward direction from the center of the bearing housing and a line of the second slot from the center of the bearing housing is formed at an acute angle.5. The air foil journal bearing according to claim 4 , wherein the angle (B) is about 30 degrees to 35 degrees.6. The air foil journal bearing according to claim 4 , wherein upward pressure of the air with respect to the rotor is formed near the second slot.7. The air foil journal bearing according to claim 6 , wherein the first top foil is combined with ...

AIR BLOWER FOR VEHICLE

The present invention provides a vehicle air compressor including a shaft provided with an impeller disposed at one side thereof and a runner disposed at the other side thereof, a motor configured to rotate the shaft, a trust bearing which supports the shaft in a longitudinal direction of the shaft and of which a surface is disposed adjacent to a surface of the runner, wherein a cooling hole for cooling air between the trust bearing and the runner is disposed in the trust bearing. 1. A vehicle air compressor comprising:a shaft provided with an impeller disposed at one side thereof and a runner disposed at the other side thereof;a motor configured to rotate the shaft; anda trust bearing which supports the shaft in a longitudinal direction of the shaft and of which a surface is disposed adjacent to a surface of the runner,wherein a cooling hole for cooling air between the trust bearing and the runner is disposed in the trust bearing.2. The vehicle air compressor of claim 1 , wherein the trust bearing is disposed on each of two surfaces of the runner.3. The vehicle air compressor of claim 2 , wherein the cooling hole is disposed in the trust bearing disposed at a side adjacent to the impeller.4. The vehicle air compressor of claim 1 , wherein the cooling hole includes a first through hole and a second through hole.5. The vehicle air compressor of claim 4 , wherein:a first housing cover and a second housing cover are provided in front of and behind the runner;the first housing cover includes a back plate connected to a rear portion of the first housing cover and a plurality of top foils disposed to be spaced apart from each other on the back plate; anda plurality of first through holes forming a first auxiliary cooling path and a plurality of second through holes passing through the back plate to form a second auxiliary cooling path are disposed in the first housing cover.6. The vehicle air compressor of claim 5 , wherein the second through holes are disposed between ...

FOIL BEARING WITH LARGE RADIUS KEY

A gas bearing within a cylinder is provided. The gas bearing comprises an anti-rotation tab sitting within a key way of the cylinder. Further, the gas bearing comprises a first foil forming an inner loop and an intermediary loop. The inner loop extends in a first direction from a first end to an intermediary portion. The intermediary loop extends from the intermediary to the anti-rotation tab. 1. A gas bearing for use in a cylinder , comprising:an outer foil including a first end and an intermediate portion, the outer foil traversing substantially around an inner circumference of the cylinder;an intermediate foil disposed around at least a portion of the outer foil, the intermediate foil traversing substantially around an inner circumference of the cylinder; anda key connecting the outer foil to the intermediate foil, the key having an inner radius that is at least 2.5 times greater than a thickness of the outer foil.2. The gas bearing of claim 1 , wherein the key has an outer radius that is at least 3.5 times greater than a thickness of the outer foil.3. The gas bearing of claim 1 , wherein the key connects an intermediate portion that defines an end of the outer foil to the intermediate foil.4. The gas bearing of claim 1 , further comprising:a corrugated foil surrounding the intermediate foil.5. A gas journal bearing system comprising:a cylinder having a keyway formed therein;an outer foil including a first end and an intermediate portion, the outer foil traversing substantially around an inner circumference of the cylinder;an intermediate foil disposed around at least a portion of the outer foil, the intermediate foil traversing substantially around an inner circumference of the cylinder; anda key connecting the outer foil to the intermediate foil, the key having an inner radius that is at least 2.5 times greater than a thickness of the outer foil and at least partially disposed in the key way.6. The gas journal bearing system of claim 5 , wherein the key has an ...

BEARING SLEEVE

Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.214 and 3.216 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1. Further included is a seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal. 1. A bearing sleeve for supporting a shaft of an air cycle machine , comprising:an outer diameter and an inner diameter, wherein the outer diameter is within a range of 3.214 and 3.216 inches;a foil retaining cavity provided in the inner diameter, the foil retaining cavity including a slot and first and second openings located at opposing axial ends of the slot, each of the first and second openings including a small portion and a large portion having different axial lengths, wherein a ratio of the combined axial lengths of the large portions to an overall axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1; anda seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal.2. The bearing sleeve as recited in claim 1 , wherein a portion of the outer diameter is arcuate relative to an outside radius having an origin radially outside of the outer diameter of the bearing sleeve.3. The bearing sleeve as recited in claim 2 , wherein the outside radius has an origin approximately 4 inches away from the outside diameter claim 2 , as measured a distance within a range of a range of 0. ...

Bearing sleeve

Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.222 and 3.224 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1. Further included is a seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal.

BEARING SLEEVE

Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.222 and 3.224 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1. 1. A bearing sleeve for supporting a shaft of an air cycle machine , comprising:an outer diameter and an inner diameter, wherein the outer diameter is within a range of 3.222 and 3.224 inches; anda foil retaining cavity provided in the inner diameter, the foil retaining cavity including a slot and first and second openings located at opposing axial ends of the slot, each of the first and second openings including a small portion and a large portion having different axial lengths, wherein a ratio of the combined axial lengths of the large portions to an overall axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1.2. The bearing sleeve as recited in claim 1 , wherein a ratio of the outer diameter to the inner diameter is within a range of 1.143:1 and 1.145:1.3. The bearing sleeve as recited in claim 1 , wherein the large portions of the first and second openings each have axial lengths within a range of 0.265 and 0.305 inches.4. The bearing sleeve as recited in claim 1 , wherein the small portions of the first and second openings each have axial lengths within a range of 0.12 and 0.16 inches.5. The bearing sleeve as recited in claim 1 , wherein the large portions of the first and second openings each have widths within a range of 0.215 and 0.225 inches claim 1 , measured ...

FOIL BEARING UNIT

A foil bearing unit includes: a first foil holder formed of a single component; a radial bearing foil mounted to an inner peripheral surface of the first foil holder; a thrust bearing foil mounted to an end surface of the first foil holder; and an inner member including: a shaft portion; and a flange portion projecting radially outward from the shaft portion. The inner member is supported in a radial direction by a fluid pressure that is generated in a radial bearing gap between a bearing surface of the radial bearing foil and an outer peripheral surface of the shaft portion, and the inner member is further supported in a thrust direction by a fluid pressure that is generated in a thrust bearing gap between a bearing surface of the thrust bearing foil and one end surface of the flange portion. 1. A foil bearing unit , comprising:a first foil holder formed of a single component;a radial bearing foil mounted to an inner peripheral surface of the first foil holder;a thrust bearing foil mounted to an end surface of the first foil holder; and a shaft portion to be inserted along an inner periphery of the first foil holder; and', 'a flange portion projecting radially outward from the shaft portion,, 'an inner member comprisingthe inner member being supported in a radial direction by a fluid pressure that is generated in a radial bearing gap between a bearing surface of the radial bearing foil and an outer peripheral surface of the shaft portion,the inner member further being supported in a thrust direction by a fluid pressure that is generated in a thrust bearing gap between a bearing surface of the thrust bearing foil and one end surface of the flange portion.2. The foil bearing unit according to claim 1 ,wherein the shaft portion comprises a hollow sleeve portion, andwherein the hollow sleeve portion and the flange portion are formed integrally with each other.3. The foil bearing unit according to or claim 1 , further comprising:a second foil holder mounted to the first ...

AIR BEARING SHAFT CHROME PLATING

An air bearing shaft for a cabin air compressor includes a first edge and a second edge, a surface extending between the first edge and the second edge, and chrome plating on the surface between the first edge and the second edge. L is a first distance from the first edge of the air bearing shaft to a first end of the chrome plating. L is a second distance from the first edge of the air bearing shaft to a second end of the chrome plating. 1. An air bearing shaft for a cabin air compressor , the air bearing shaft comprising:a first edge and a second edge;a surface extending between the first edge and the second edge; andchrome plating on the surface between the first edge and the second edge;{'b': '1', 'wherein L is a first distance from the first edge of the air bearing shaft to a first end of the chrome plating; and'}{'b': '2', 'wherein L is a second distance from the first edge of the air bearing shaft to a second end of the chrome plating.'}221. The air bearing shaft of claim 1 , wherein a ratio of L to L is between 6.700 and 318.000.3. The air bearing shaft of claim 1 , and further comprising:chrome fade out on the surface of the air bearing shaft between the second end of the chrome plating and the second edge of the air bearing shaft;{'b': '3', 'wherein L is a third distance from the first edge of the air bearing shaft to an end of the chrome fade out.'}432. The air bearing of claim 3 , wherein a ratio of L to L is between 0.874 and 1.187.531. The air bearing shaft of claim 3 , wherein a ratio of L to L is between 6.950 and 318.000.6123. The air bearing shaft of claim 3 , wherein L is between 0.010 inches (0.0254 centimeters) and 0.400 inches (1.016 centimeters) claim 3 , L is between 2.680 inches (6.8072 centimeters) and 3.180 inches (8.0772 centimeters) claim 3 , and L is between 2.680 inches (7.0612 centimeters) and 3.180 inches (8.0772 centimeters).7. The air bearing shaft of claim 1 , wherein the chrome plating includes a mirror finish.8. An air bearing ...

AIR FOIL BEARING ASSEMBLY

An air foil bearing assembly is provided. The air foil bearing assembly includes a bearing housing that has a hollow into which a rotary shaft is fitted and a slot of which both ends are open toward front and rear sides formed on an inner circumference surface of the hollow. A bump foil is provided to have a combining portion inserted to the slot and disposed in the inner circumference surface of the hollow. A top foil having a combining portion is inserted to the slot and is disposed in an inner side of the bump foil. A stopper is disposed on one of the combining portions of the bump foil or the top foil to prevent the combining portion of the bump foil or the top foil from being displaced from the slot toward the front and rear sides. 1. An air foil bearing assembly , comprising:a bearing housing that includes a hollow into which a rotary shaft is fitted and a slot which is open toward front and rear sides of the bearing housing and which is formed on an inner circumference surface of the hollow;a bump foil that includes a first combining portion inserted into the slot and is disposed in the inner circumference surface of the hollow;a top foil that includes a second combining portion inserted into the slot and is disposed in an inner side of the bump foil; anda stopper disposed on the first combining portion to prevent the first combining portion from being displaced from the slot.2. The air foil bearing assembly of claim 1 , wherein the stopper includes an engagement key formed at front and rear ends of the first combining portion claim 1 , and supporting front and rear surfaces of the bearing housing.3. The air foil bearing assembly of claim 2 , wherein the engagement key surrounds front and rear ends of the second combing portion.4. An air foil bearing assembly claim 2 , comprising:a bearing housing that includes a hollow into which a rotary shaft is fitted and a slot formed on an inner circumference surface of the hollow, wherein the slot has a front open end ...

FOIL BEARING

A foil bearing includes an outer member (), and a plurality of foils () that are mounted to an inner circumferential surface () of the outer member () and directly face the inner circumferential surface () of the outer member () in a radial direction without interposition of another member (such as back foils). The foils () each include: holding portions () that are formed at both circumferential ends and held while in contact with the outer member (); and a body portion () that is formed circumferentially between the holding portions () and has a bearing surface (A). At least an end portion on one side in a circumferential direction of the body portion () is raised radially inward with respect to the inner circumferential surface () of the outer member (). 111-. (canceled)12. A foil bearing , comprising:an outer member that has an inner circumferential surface having a cylindrical surface shape; anda plurality of foils that are mounted to the inner circumferential surface of the outer member, the foil bearing being configured to radially support a shaft inserted on an inner circumference of the outer member in a freely relatively rotatable manner, a holding portion formed at one circumferential end and held while in contact with the outer member;', 'an another holding portion formed at another circumferential end and held while in contact with the outer member; and', 'a body portion formed circumferentially between the holding portions and has a bearing surface,, 'wherein the plurality of foils each comprisingwherein the holding portion of the each of the plurality of foils is inserted to a fixing groove formed in the inner circumferential surface of the outer member with a gap,wherein a boundary portion between a circumferential end of the body portion and the holding portion of the each of the plurality of foils is smoothly continued without being bent, andwherein the holding portion of the each of the plurality of foils is inclined radially outward to one ...

High strength foil journal bearing retainer

A journal foil bearing includes a bearing retainer having one slot configured to receive a top foil leading edge tab and another slot configured to receive a top foil trailing edge tab. A backup support structure, integral to the bearing retainer, extends between and is at least partially defined by the slots. The retainer is configured so that, during operation, the trailing edge tab further contacts, at an increased contact pressure, the support structure at a position close to the friction force, thereby minimizing top foil bending stress and improving bearing strength.

QUAD FOIL JOURNAL AIR BEARING

A quad foil journal air bearing includes a journal sleeve having an inner circumference that defines an inner surface. A first foil assembly includes a first key coupled to the inner surface of the journal sleeve. The quad foil journal air bearing further includes a second foil assembly having a second key coupled to the inner surface of the journal sleeve. 1. A quad foil journal air bearing comprising:a journal sleeve having an inner circumference that defines an inner surface;a first foil assembly including a first key coupled to the inner surface of the journal sleeve; anda second foil assembly including a second key coupled to the inner surface of the journal sleeve.2. The quad foil journal air bearing of claim 1 , wherein the first key is coupled to a first portion of the inner surface and the second key is coupled to a second portion of the inner surface different from the first portion.3. The quad foil journal air bearing of claim 2 , wherein the journal sleeve further includes a first key slot formed in the first portion of the inner surface and a second key slot formed in the second portion of the inner surface claim 2 , the first key slot offset with respect to the second key slot.4. The quad foil journal air bearing of claim 3 , wherein the first key extends radially from the first foil assembly and engages the first key slot and the second key extends radially from the second foil assembly engages the second key slot such that the first key is offset with respect to the second key.5. The quad foil journal air bearing of claim 4 , wherein the second key slot located 180 degrees from the first key slot.6. The quad foil journal air bearing of claim 5 , wherein the first foil assembly and the second foil assembly each have a length to diameter aspect ratio of approximately 1 to 2 claim 5 , respectively.7. The quad foil journal air bearing of claim 6 , wherein the first foil assembly and the second foil assembly each comprise:a top foil;an intermediate foil ...

Wing Foil Bearings and Methods of Manufacturing Same

A wing foil bearing may include one or more wing or tab foil layers. A tab foil layer may comprise a thin material with a two-dimensional array of tab shapes. A tab shape may be defined by a boundary of material separated from the thin material and having an integral edge and a free edge. Tab shapes may include one or more free-state bends relative to the thin material, forming a two-dimensional array of cantilever wings or tabs. Tab arrays may be one or more of various types or two-dimensional arrays, and a tab foil layer may include additional tab arrays and tabs. One or more tab foil layers may be engaged with a mounting surface layer and a counter-surface layer to form a wing foil bearing. Tab foil layers may be stacked and or nested, including partial nesting and complete nesting.

WING FOIL BEARINGS AND METHODS OF MANUFACTURING SAME

A wing foil bearing may include one or more wing or tab foil layers. A tab foil layer may comprise a thin material with a two-dimensional array of tab shapes. A tab shape may be defined by a boundary of material separated from the thin material and having an integral edge and a free edge. Tab shapes may include one or more free-state bends relative to the thin material, forming a two-dimensional array of cantilever wings or tabs. Tab arrays may be one or more of various types or two-dimensional arrays, and a tab foil layer may include additional tab arrays and tabs. One or more tab foil layers may be engaged with a mounting surface layer and a counter-surface layer to form a wing foil bearing. Tab foil layers may be stacked and or nested, including partial nesting and complete nesting. 1. A wing foil bearing comprising:a first tab foil layer comprising a first array of cantilever tabs, each cantilever tab in the first array having: (i) an integral edge integral, (ii) a boundary defining a free edge, the free edge substantially opposite the integral edge, (iii) a first free-state bend along the integral edge bending in a first direction, (iv) a second free-state bend between the first free-state bend and the free edge bending in a direction opposite to the first free-state bend, and (v) a third free-state bend between the second free-state bend and the free edge;wherein the first free-state bend and the second free-state bend define a first effective height, the first free-state bend and the third free-state bend define a second effective height, and at rest the first effective height is not the same as the second effective height.2. The wing foil bearing of claim 1 , wherein the third free-state bend is bending in a direction opposite to the first free-state bend.3. The wing foil bearing of claim 1 , wherein at rest claim 1 , the second effective height is greater than the first effective height.4. The wing foil bearing of claim 1 , further comprising a mounting ...

RADIAL GAS FOIL BEARING

A radial gas foil bearing extending along a rotation axis including a carrier element provided with an opening extending along the axis, further including at least one foil extending circumferentially along a radial inner side of the opening of the carrier element, wherein the foil is attached to the carrier element is provided. In order to enable an easy manufacturing as well as safe operation it is proposed to provide at least one radial through hole in the carrier ring, wherein at least one fixation section of the foil is formed to be inserted into the through hole, wherein the fixation section and the through hole are made such that fixation section becomes by insertion into the through hole accessible from radial outside of the carrier element to be fixed to the carrier element. 1. A gas foil bearing extending along a rotation axis comprising:a carrier element provided with an opening extending along the rotation axis; andat least one foil extending circumferentially along a radial inner side of the opening of the carrier element, wherein the at least one foil is attached to carrier element;wherein at least one radial through hole in the carrier element provided, at least one fixation section of the at least one foil is formed to be inserted into the at least one radial through hole, the at least one fixation section and the at least one radial through hole are made such that the at least one fixation section becomes, by insertion into the at least one radial through hole, accessible from radial outside of the carrier element to be fixed to the carrier element.2. The radial gas foil bearing according to claim 1 , wherein the at least one fixation section comprises at least one fixation section flap claim 1 , said the at least one fixation section flap protruding radial outside of the carrier element through the at least one radial through hole after the at least one fixation section flap is inserted into the at least one radial through hole claim 1 , further ...

RADIAL FOIL BEARING

The radial foil bearing includes: a housing provided with an insertion hole; a back foil disposed on an inner peripheral surface of the insertion hole, a notch being provided at an edge of the hack foil in an axial direction in which the insertion hole extends; and an engagement member attached to the housing in a state of passing through the notch and extending to outside of a formation area of the notch in a circumferential direction of the insertion hole on an inner peripheral side of the back foil. 1. A radial foil bearing , comprising:a housing provided with an insertion hole;a back foil disposed on an inner peripheral surface of the insertion hole, a notch being provided at an edge of the back foil in an axial direction in which the insertion hole extends; andan engagement member attached to the housing in a state of passing through the notch and extending to outside of a formation area of the notch in a circumferential direction of the insertion hole on an inner peripheral side of the hack foil.2. The radial foil bearing according to claim 1 , whereinthe engagement member extends toward two sides in the circumferential direction of the formation area of the notch on the inner peripheral side of the back foil.3. The radial foil bearing according to claim 1 , comprisingan intermediate, foil supported by the back foil, a second notch being provided at an edge of the intermediate foil in the axial direction, whereinthe engagement member is attached to the housing in a state of passing through the notch and the second notch and extends to outside of a formation area of the second notch in the circumferential direction of the insertion hole on an inner peripheral side of the intermediate foil.4. The radial foil hearing according to claim 1 , whereinan engagement groove extending outward in a radial direction from an inner peripheral edge of the insertion hole is provided on an end surface in the axial direction of the housing, andthe engagement member contacts an ...

RADIAL FOIL BEARING

A radial foil bearing includes: a bearing housing provided with an insertion hole; a top foil accommodated in the insertion hole; and a cover attached to an end surface of the bearing housing in an axial direction in which the insertion hole extends, wherein the top foil is rolled in a cylindrical shape in a state where two ends of the top foil intersect such that the two ends of the top foil are pulled out toward the bearing housing, and the cover faces, in the axial direction, at least either one of the two ends of the top foil, and an engagement member attached to the bearing housing and engaging with the top foil. 1. A radial foil bearing , comprising:a bearing housing provided with an insertion hole;a top foil accommodated in the insertion hole; anda cover attached to an end surface of the bearing housing in an axial direction in which the insertion hole extends, whereinthe top foil is rolled in a cylindrical shape in a state where two ends of the top foil intersect such that the two ends of the top foil are pulled out toward the bearing housing, and the two ends of the top foil, and', 'an engagement member attached to the bearing housing and engaging with the top foil., 'the cover faces, in the axial direction, at least either one of'}2. The radial foil bearing according to claim 1 , whereinthe insertion hole is provided with a through groove extending from the end surface of the bearing housing in the axial direction,the two ends of the top foil are accommodated in the through groove, andthe cover covers at least part of an open end of the through groove formed Can the end surface of the bearing housing.3. The radial foil bearing according to claim 2 , whereinthe engagement member is accommodated in the through groove.4. The radial foil bearing according to claim 3 , whereina surface of the engagement member facing a bottom surface of the through groove is flat.5. The radial foil bearing according to claim 3 , whereinthe engagement member has a chamfer facing ...

DEVICE FORMING AN AERODYNAMIC RADIAL BEARING WITH SHEETS AND METHOD FOR MANUFACTURING SUCH A DEVICE

The invention relates to a device forming a foil air bearing, comprising a cylindrical sleeve () extending along a longitudinal direction, and having an inner surface () which defines a central bore, characterized in that it further comprises: at least one longitudinal notch () formed in said cylindrical sleeve and opening radially into said central bore; a first peripheral inner lining, called the bump lining, comprising at least one metal foil equipped with radial projections, called the bump foil (), each bump foil having, at each end, a radial tongue, called the radial bump tongue (), housed freely in a longitudinal notch (); a second peripheral inner lining, called the top lining, comprising at least one metal foil, called the top foil (), each top foil having, at each end, a radial tongue, called the radial top tongue (), housed freely in a longitudinal notch (). 110. A device forming a foil air bearing , comprising a cylindrical sleeve () extending along a longitudinal direction , and having an inner surface which defines a central bore , the device comprising:{'b': '42', 'at least one longitudinal notch formed in said cylindrical sleeve and opening radially into said central bore through an opening (),'}a bump lining, comprising at least one bump foil comprising a metal fail equipped with radial projections, said bump lining forming a main curve housed in said central bore and carrying said projections arranged opposite said inner surface of said cylindrical sleeve to form an elastically deformable lining, each bump foil having, at each end, a radial bump tongue freely housed in a longitudinal notch,a top lining, housed in said central bore and comprising at least metal top foil, said top lining forming a main curve housed in said central bore and arranged opposite said main curve of said bump lining to define an enclosure for receiving a shaft of a rotating machine, each top lining having, at each end, a radial top tongue freely housed in a longitudinal ...

WING FOIL BEARINGS AND METHODS OF MANUFACTURING SAME

A wing foil bearing may include one or more wing or tab foil layers. A tab foil layer may comprise a thin material with a two-dimensional array of tab shapes. A tab shape may be defined by a boundary of material separated from the thin material and having an integral edge and a free edge. Tab shapes may include one or more free-state bends relative to the thin material, forming a two-dimensional array of cantilever wings or tabs. Tab arrays may be one or more of various types or two-dimensional arrays, and a tab foil layer may include additional tab arrays and tabs. One or more tab foil layers may be engaged with a mounting surface layer and a counter-surface layer to form a wing foil bearing. Tab foil layers may be stacked and or nested, including partial nesting and complete nesting. 1. A wing foil bearing comprising:a mounting surface layer;a first tab foil layer cooperatively engaged with the mounting surface layer, the tab foil layer comprising a first thin material with a two-dimensional array of a first plurality of tab shapes, each tab shape defined by a boundary of material separated from the thin material and having an integral edge integral with the first thin material and a free edge substantially opposite the integral edge, each tab shape bent relative to the thin material in close proximity to the integral edge to form a first two-dimensional array of cantilever tabs having a first free-state bend;a counter-surface layer cooperatively engaged with at least a portion of the first two-dimensional array of cantilever tabs.2. The wing foil bearing of claim 1 , wherein each cantilever tab in the first two-dimensional array of cantilever tabs is bent at a first free-state bend angle relative to the first thin material.3. The wing foil bearing of claim 1 , wherein each first free-state bend has a bend angle selected from a plurality of angles relative to the first thin material.4. The wing foil bearing of claim 1 , wherein each cantilever tab in the first ...

AIRFOIL JOURNAL BEARING HAVING IMPROVED TOP FOIL

An airfoil journal bearing includes a bearing housing having a hollow portion in which a rotor is disposed, and formed such that width-wise both sides are opened; a bump foil provided at an inner side of the bearing housing and formed in the circumferential direction thereof, and coupled and fixed to the bearing housing; and a top foil provided at an inner side of the bump foil and formed along the circumferential direction thereof, and of which one side is coupled and fixed to the bearing housing. The top foil comprises: an outer top foil, an inner top foil and an intermediate top foil interposed between the outer top foil and the inner top foil. 1. An airfoil journal bearing having an improved top foil , comprising:a bearing housing including a hollow portion which is formed therein and in which a rotor is disposed and having width-direction opposite sides that are formed to be open;a bump foil disposed inside the bearing housing, formed in a circumferential direction, and fixedly coupled to the bearing housing; anda top foil disposed inside the bump foil, formed in a circumferential direction, and having one side fixedly coupled to the bearing housing,wherein the top foil includes:an external top foil closely mounted to the bump foil and having one side and the other side that are disposed on the rotor;an internal top foil disposed inside the external top foil to contact the rotor and having one side and the other side that are disposed on the rotor; andan intermediate top foil interposed between the external top foil and the internal top foil and formed with a smaller length than the external top foil and the internal top foil in such a way that one side of the intermediate top foil is disposed on the rotor and the other end portion is disposed below the rotor.2. The airfoil journal bearing having the improved top foil of claim 1 , wherein the intermediate top foil is formed in an opposite direction to a rotation direction of the rotor based on one side fixed to ...

FLUID FILM HYDRODYNAMIC FLEXURE PIVOT TILTING PAD SEMI-FLOATING RING JOURNAL BEARING WITH COMPLIANT DAMPERS

A turbocharger is provided with an improved bearing preferably formed as a semi-floating ring journal bearing which has hydrodynamic flexure pivot tilting pads on the inner diameter thereof and compliant structural dampers on the outer diameter thereof. The compliant structural dampers are installed between an outer bearing surface and an inner surface of a bearing chamber These compliant structural dampers can be formed as metal mesh dampers or bump foil dampers which are effective to dissipate mechanical energy from structural damping and dry-friction. 1. A semi-floating ring bearing assembly for a turbocharger shaft , comprising:{'b': 52', '53', '54', '52', '58', '50, 'a semi-floating ring bearing which has an inner diameter and an outer diameter, wherein said bearing includes hydrodynamic flexure pivot tilting pads on said inner diameter thereof and compliant structural dampers on said outer diameter thereof, said compliant structural dampers projecting radially outwardly from said bearing for contact with an opposing bearing chamber surface of a bearing housing .'}2547172. The bearing assembly according to claim 1 , wherein said compliant structural dampers can be formed as metal mesh dampers or bump foil dampers .3526667685867685869705467686970. The bearing assembly according to claim 1 , wherein opposite ends of said bearing include annular bearing flanges which define outer bearing surfaces and which face toward a bearing chamber surface claim 1 , said outer bearing surfaces and being spaced inwardly from a bearing chamber surface to define radial spaces and claim 1 , wherein said compliant structural dampers project outwardly of said outer bearing surfaces and so as to span said radial spaces and .45266858554. The bearing assembly according to claim 1 , wherein said bearing includes annular flanges which are each formed with circumferential mounting pockets claim 1 , each of said pockets receiving a respective one of said compliant structural dampers . ...

FOIL BEARING

A foil bearing includes an outer member (), and a plurality of foils () that are mounted to an inner circumferential surface () of the outer member () and directly face the inner circumferential surface () of the outer member () in a radial direction without interposition of another member (such as back foils). The foils () each include: holding portions () that are formed at both circumferential ends and held while in contact with the outer member (); and a body portion () that is formed circumferentially between the holding portions () and has a bearing surface (A). At least an end portion on one side in a circumferential direction of the body portion () is raised radially inward with respect to the inner circumferential surface () of the outer member (). 111-. (canceled)12. A foil bearing , comprising:an outer member that has an inner circumferential surface having a cylindrical surface shape; anda plurality of foils that are mounted to the inner circumferential surface of the outer member, the foil bearing being configured to radially support a shaft which rotates to one side in a circumferential direction with respect to the outer member, holding portions that are formed at both circumferential ends and held while in contact with the outer member; and', 'a body portion that is formed circumferentially between the holding portions and has a bearing surface, and, 'wherein the plurality of foils each comprisewherein the holding portion on the one side in the circumferential direction of the each of the plurality of foils is inserted to a fixing groove formed in the inner circumferential surface of the outer member.13. The foil bearing according to claim 12 , wherein the holding portion on another side in the circumferential direction of the each of the plurality of foils is arranged between adjacent foil and the inner circumferential surface of the outer member.14. The foil bearing according to claim 12 , wherein the fixing groove is inclined radially outward to ...

FOIL BEARING ASSEMBLY

A foil bearing assembly includes a cylindrical body that defines a cooling fluid passage between a radial outer surface and a radial inner surface of the cylindrical body. The foil bearing assembly includes a foil bearing retained within the cylindrical body and in thermal communication with the radial inner surface of the cylindrical body. The foil bearing assembly is connectable to a bearing housing such that intake and outlet ports of the foil bearing assembly are connected in fluid communication with a coolant inlet passage and a coolant outlet passage defined by the bearing housing. The foil bearing assembly is interchangeable with a second foil bearing assembly having at least one of a cooling fluid passage, a foil bearing, and a cylindrical body inner diameter different than the corresponding cooling fluid passage, the foil bearing, and the cylindrical body inner diameter of the first foil bearing assembly. 1. A compressor system comprising:a compressor housing;a motor driveshaft rotatably supported within the compressor housing;an impeller connected to the driveshaft and operable to compress incoming refrigerant gas upon rotation of the driveshaft;a bearing housing mounted to the compressor housing and defining a coolant inlet passage and a coolant outlet passage; andfirst and second foil bearing assemblies, each of the first and second foil bearing assemblies comprising:a cylindrical body having an outer surface including a pair of opposed end surfaces and a radial outer surface defining an outer diameter of the cylindrical body, the cylindrical body further having a radial inner surface defining an inner diameter of the cylindrical body, the cylindrical body defining a cooling fluid passage between the radial outer surface and the radial inner surface, wherein the cooling fluid passage extends from an intake port defined in the outer surface to an outlet port defined in the outer surface; anda foil bearing retained within the cylindrical body and in ...

BEARING SLEEVE FOR AIR BEARING

An air bearing assembly is provided that includes a bearing sleeve that has two slots side-by-side having rectangular profiles for engaging the ends of first and second bearing foils for supporting a shaft of a dual-stage compressor. The first rectangular-profile slot, which may be made using a broaching process, is designed to receive first ends of the first bearing foil and the second bearing foil. The second rectangular-profile slot, which may also be made using a broaching process, is designed to receive a second end of the second bearing foil. This dual-slot design replaces the complex “L” shaped single slot design of conventional bearing sleeves, allowing for high-volume, low-cost manufacturing of the bearing sleeves. The dual-slot design also provides for robust engagement of the bearing foils with the bearing sleeves, while allowing easy assembly and installation of the air bearing assemblies. 1. An air bearing assembly for a turbomachinery shaft comprising:a bearing sleeve configured to support a turbomachinery shaft, wherein the bearing sleeve defines an inner surface;a first bearing foil disposed proximate the inner surface of the bearing sleeve; anda second bearing foil disposed between the first bearing foil and the shaft supported by the bearing sleeve,wherein the inner surface of the bearing sleeve defines a first retention slot configured to engage a first end of the first bearing foil and a first end of the second bearing foil, andwherein the inner surface of the bearing sleeve defines a second retention slot spaced from the first retention slot and configured to engage a second end of the second bearing foil, such that the first and second bearing foils are maintained in engagement with the bearing sleeve via engagement of the respective ends with a corresponding one of the first and second retention slots.2. The air bearing assembly of claim 1 , wherein a cross-section of at least one of the first or second retention slots consists of two opposing ...

BEARING ARRANGEMENT

A bearing arrangement () having at least one radial air bearing () and/or having an axial air bearing (′). The radial air bearing () has an inner annular bearing plate () and a spring plate () which surrounds the bearing plate () at the outside. The bearing plate and spring plate being formed as a single-piece component. 115. An axial air bearing (′) having{'b': '16', 'an annular bearing plate () and'}{'b': 17', '18', '19', '19', '25', '38', '42', '16', '17', '18', '19', '19', '25, 'an annular spring arrangement (, , , ′, ) on which is arranged a cover plate () which is provided with a device () for building up air pressure between the bearing plate () and the spring arrangement (, , , ′, ).'}217181919251718161919. The axial air bearing as claimed in claim 1 , wherein the spring arrangement ( claim 1 , claim 1 , claim 1 , ′ claim 1 , ) is provided with a multiplicity of raised protuberances ( claim 1 , ) which are arranged on the bearing plate () and on which rest spring plate portions (′) of a spring plate ().322. The axial air bearing as claimed in claim 1 , further comprising a rotation prevention means ().42223. The axial air bearing as claimed in claim 3 , wherein the rotation prevention means () has a multiplicity of spaced-apart claim 3 , circumferentially arranged receiving recesses () for rotation prevention pins.542. The axial air bearing as claimed in claim 1 , wherein the device for building up air pressure is in the form of a spiral duct arrangement ().6171819192516. The axial air bearing as claimed in claim 1 , wherein the device for building up air pressure is in the form of an external air feed device which pumps air from the outside between the spring arrangement ( claim 1 , claim 1 , claim 1 , ′ claim 1 , ) and the bearing plate ().7251938. The axial air bearing as claimed in claim 1 , wherein a support plate () is arranged between the spring plate () and the cover plate ().84350. An axial air bearing claim 1 , characterized by an annular carrier ...

Quad foil journal air bearing

A quad foil journal air bearing includes a journal sleeve having an inner circumference that defines an inner surface. A first foil assembly includes a first key coupled to the inner surface of the journal sleeve. The quad foil journal air bearing further includes a second foil assembly having a second key coupled to the inner surface of the journal sleeve.

FOIL BEARING, AND FOIL BEARING UNIT AND TURBO MACHINE EACH HAVING SAME

A foil bearing includes: a tubular foil holder (); and a plurality of foils () having a radial bearing surface (S) and being arrayed on an inner peripheral surface () of the foil holder () in a circumferential direction. Both circumferential ends (projecting portions () and projecting portion ()) of each of the foils () are held on the foil holder (). The foil bearing is configured to support a shaft () inserted along an inner periphery thereof in a freely rotatable manner. The plurality of foils () are held on the foil holder () under a circumferentially movable state. 1. A foil bearing , comprising:a tubular foil holder; anda plurality of foils arrayed on an inner peripheral surface of the tubular foil holder in a circumferential direction of the tubular foil holder,the plurality of foils being held on the tubular foil holder under a state in which both circumferential ends of each of the plurality of foils are held in contact with the tubular foil holder,the plurality of foils being held on the tubular foil holder under a state in which the plurality of foils are movable relative to the tubular foil holder in the circumferential direction.2. The foil bearing according to claim 1 ,wherein the tubular foil holder has a plurality of recessed portions formed in the inner peripheral surface of the tubular foil holder,wherein an end portion of the each of the plurality of foils on a downstream side in a rotation direction is inserted into each of the plurality of recessed portions, andwherein an end portion of the each of the plurality of foils on an upstream side in the rotation direction is arranged between adjacent one of the plurality of foils and the inner peripheral surface of the tubular foil holder.3. The foil bearing according to claim 2 , wherein the each of the plurality of recessed portions has a corner portion claim 2 , which is formed on an inner wall of the each of the plurality of recessed portions claim 2 , and is configured to allow the end portion of ...

FOIL BEARING ASSEMBLY AND COMPRESSOR INCLUDING SAME

A bearing system includes a bearing housing that includes a sleeve and a mounting structure for connecting the bearing system to a compressor housing. The sleeve has a radial inner surface that defines a cylindrical bore, and includes a locking feature located along the radial inner surface. The mounting structure is located radially outward from the sleeve. The bearing system also includes a foil bearing assembly positioned within the cylindrical bore. The foil bearing assembly includes an outer foil, an inner foil, and a bump foil positioned between the outer foil and the inner foil. At least one of the outer foil and the inner foil includes a bearing retention feature cooperatively engaged with the locking feature to maintain the foil bearing assembly within the bearing housing at a fixed rotational position.

Foil bearing with split key

A gear bearing within a cylinder is provided. The gear bearing comprises an anti-rotation tab comprising a first side and a second side, the anti-rotation tab sitting within a key way of the cylinder. Further, the gear bearing also comprises a first foil extending in a first direction from a first end to the first side of the anti-rotation tab and a second foil extending in a second direction from a second end to the second side of the anti-rotation tab.

FOIL BEARING, PRODUCTION METHOD THEREFOR, AND INTERMEDIATE PRODUCT OF FOIL BEARING

A foil bearing () includes foils () at a plurality of portions in a rotation direction of a shaft member (). A top foil portion (Tf) including a bearing surface (S) is formed in a region including a front end () of each of the foils (), and a back foil portion (Bf) is formed in a region including a rear end () of each of the foils (). A gap (C) is secured between, of two of the foils adjacent to the foil () in a rotation direction (R) and a direction opposite to the rotation direction, the rear end () of the foil on the rotation direction side and the front end () of the foil on the side opposite to the rotation direction side. A width of the gap (C) is set to be non-uniform in a direction (N) orthogonal to the rotation direction. 1. A foil bearing , comprising foils which are arranged at a plurality of portions in a rotation direction of a shaft member to be supported ,the foils each having a front end located on the rotation direction side and a rear end located on a side opposite to the rotation direction side,the foils each forming a top foil portion comprising a bearing surface in a region including the front end of the foil and a back foil portion, which is arranged behind the top foil portion of adjacent one of the foils, in a region including the rear end of the foil,wherein a gap in the rotation direction is secured between, of two of the foils adjacent to any one of the foils in the rotation direction and the direction opposite to the rotation direction, the rear end of the foil on the rotation direction side and the front end of the foil on the side opposite to the rotation direction side, andwherein a width of the gap is set to be non-uniform in a direction orthogonal to the rotation direction.2. The foil bearing according to claim 1 , wherein claim 1 , of the two of the foils claim 1 , the rear end of the foil on the rotation direction side and the front end of the foil on the side opposite to the rotation direction side have contour shapes different ...

FOIL BEARING

A foil bearing includes a foil holder and a plurality of foils fixed to the foil holder and arrayed in a circumferential direction. Each of the foils includes a top foil portion having a bearing surface, an extending portion formed on one circumferential side of the top foil portion, an underfoil portion formed on another circumferential side of the top foil portion, and an insertion slot formed between the top foil portion and the underfoil portion in the circumferential direction. The insertion slot includes a positioning portion and a wide portion that is larger in circumferential width than the positioning portion and is opened to an end portion of each of the foils. An edge of the top foil portion, which is opposed to the wide portion, retreats toward the one circumferential side with respect to an edge opposed to the positioning portion. 1. A foil bearing , comprising:a foil holder; anda plurality of foils fixed to the foil holder so as to be arrayed in a circumferential direction of the foil bearing, a top foil portion having a bearing surface;', 'an extending portion formed on one circumferential side of the top foil portion;', 'an underfoil portion formed on another circumferential side of the top foil portion and arranged between the top foil portion of another of the foils and the foil holder; and', 'an insertion slot formed between the top foil portion and the underfoil portion in the circumferential direction, into which the extending portion of the another of the foils is inserted,, 'each of the foils comprising a positioning portion to be engaged with the extending portion of the another of the foils in the circumferential direction; and', 'a wide portion that is larger in circumferential width than the positioning portion and is opened to an end portion of the each of the foils,, 'the insertion slot comprisingwherein an edge of the top foil portion, which faces to the wide portion of the insertion slot, is retreated toward the one circumferential ...

Brush Damper Rings for Radial Fluid Bearing

A bearing assembly for a rotating shaft, with brush rings on both sides of the bearing mechanism for damping bearing motion. In a foil gas bearing embodiment, the bearing itself comprises a hollow sleeve, a compliant layer, and a top foil layer. These bearing elements are arranged in a conventional manner except that the top foil layer extends beyond the sleeve. A sleeve extension extends over the extended portion of the top foil layer. Two opposing brush rings, an inner brush ring and an outer brush ring, are attached to the top foil layer extension and the sleeve extension, respectively. The bristles of an inner brush ring and the bristles of an outer brush ring are interposed and provide damping during operation of the bearing. 1. A foil gas bearing for a rotating shaft , comprising:a hollow sleeve;a compliant layer surrounding the inner surface of the sleeve;a top foil layer inside the compliant layer;wherein the compliant layer supports the top foil layer during rotation of the shaft by means of a spring-like structure;wherein the top foil layer extends beyond the sleeve on at least one end of the sleeve;a sleeve extension over the portion of the top foil layer that extends beyond the sleeve;an inner brush ring on the outer surface of the top foil layer and having bristles that extend outwardly from the top foil layer; andan outer brush ring on the inner surface of the sleeve extension and having bristles that extend inwardly from the sleeve extension;wherein the bristles of the inner brush ring and the bristles of the outer brush ring are interposed.2. The bearing of claim 1 , wherein the compliant layer comprises one of the following: a bump foil layer claim 1 , a metal mesh layer claim 1 , a leaf spring layer claim 1 , or an elastomeric element.3. The bearing of claim 1 , wherein the top foil layer extends beyond the sleeve on both ends of the sleeve claim 1 , and each end of the sleeve has a sleeve extension claim 1 , and inner brush ring claim 1 , and an ...

FOIL BEARING

A foil bearing includes an outer member (), and a plurality of foils () that are mounted to an inner circumferential surface () of the outer member () and directly face the inner circumferential surface () of the outer member () in a radial direction without interposition of another member (such as back foils). The foils () each include: holding portions () that are formed at both circumferential ends and held while in contact with the outer member (); and a body portion () that is formed circumferentially between the holding portions () and has a bearing surface (A). At least an end portion on one side in a circumferential direction of the body portion () is raised radially inward with respect to the inner circumferential surface () of the outer member (). 1. A foil bearing , comprising:an outer member that has an inner circumferential surface having a cylindrical surface shape; anda plurality of foils that are mounted to the inner circumferential surface of the outer member and directly face the inner circumferential surface of the outer member in a radial direction without interposition of another member, the foil bearing being configured to radially support a shaft inserted on an inner circumference of the outer member in a freely relatively rotatable manner, holding portions that are formed at both circumferential ends and held while in contact with the outer member; and', 'a body portion that is formed circumferentially between the holding portions and has a bearing surface, and, 'wherein the plurality of foils each comprisewherein at least an end portion on one side in a circumferential direction of the body portion of each of the plurality of foils is raised radially inward with respect to the inner circumferential surface of the outer member.2. The foil bearing according to claim 1 , wherein at least the holding portion on the one side in the circumferential direction of the each of the plurality of foils is inserted to a fixing groove formed in the inner ...

AIR BEARING WITH SURFACE LAYER

An example embodiment of an air bearing assembly includes at least a first member and a shaft with a flange configured to rotate with respect to the first member. The first member has a coating on at least one surface facing at least one of the shaft and the flange. The coating includes tungsten carbide, a nonpolymeric self-lubricating coating, or a combination thereof. 1. An air bearing assembly , comprising:a first member; anda shaft with a flange configured to rotate with respect to the first member;wherein the first member has a coating on at least one first surface facing at least one second surface of the shaft and the flange, the coating comprising tungsten carbide, a nonpolymeric self-lubricating coating, or a combination thereof.2. The air bearing assembly of claim 1 , wherein the first member is one of a stationary journal and a stationary foil bearing.3. The air bearing assembly of claim 1 , wherein the coating can withstand an operating temperature above 550° F. (about 288° C.).4. The air bearing assembly of claim 1 , wherein the coating can withstand an operating temperature above 750° F. (about 400° C.).5. The air bearing assembly of claim 1 , wherein the coating is greater than about 0.00004 inch (1 micron) thick.6. The air bearing assembly of claim 5 , wherein the coating is less than 0.002 inch (50 microns) thick.7. The air bearing assembly of claim 1 , wherein the coating is free of fluorinated compounds.8. The air bearing assembly of claim 1 , wherein the self-lubricating coating is selected from a group consisting of: diamond-like carbon (DLC) claim 1 , WS claim 1 , WSi claim 1 , AgO claim 1 , Ag claim 1 , BN claim 1 , MoS claim 1 , and combinations thereof.9. The air bearing assembly of claim 1 , further comprising:a second member disposed on a side of the flange opposite the first stationary member, wherein the second member has a coating on a surface facing the flange, the coating comprising tungsten carbide, a nonpolymeric self-lubricating ...

Air bearing shaft assembly with surface layer

An example embodiment of an air bearing assembly includes a first member and a shaft with a flange configured to rotate with respect to the first member. The first member has a first coating on at least one first surface facing at least one second surface on the flange or the shaft. The first coating includes tungsten carbide, a nonpolymeric self-lubricating coating, or a combination thereof. At least one of the second surfaces has a second coating on a surface facing the first coating.

RADIAL FOIL BEARING

A radial foil bearing includes: a cylindrical top foil disposed so as to face a rotary shaft; a back foil disposed outside in the radial direction of the top foil; and a cylindrical bearing housing accommodating the top foil and the back foil. The bearing housing is provided with a limiting member which limits movement of the back foil. A locking recess is provided in a central part in the axial direction of an inner circumferential surface of the bearing housing. In addition, the limiting member includes a locking protrusion and is fixed to the bearing housing by the locking protrusion being locked into the locking recess. 1. A radial foil bearing for supporting a rotary shaft in a state of encircling the rotary shaft , the radial foil bearing comprising:a cylindrical top foil disposed so as to face the rotary shaft;a back foil disposed outside in a radial direction of the top foil; anda cylindrical bearing housing accommodating the top foil and the back foil;wherein the bearing housing is provided with a limiting member which limits movement of the back foil at least in an axial direction of the bearing housing,wherein a locking recess is provided in a central part in the axial direction of an inner circumferential surface of the bearing housing, andwherein the limiting member includes a locking protrusion and is fixed to the bearing housing by the locking protrusion being locked into the locking recess of the bearing housing.2. The radial foil bearing according to claim 1 ,wherein the inner circumferential surface of the bearing housing is provided with a holding groove which is formed in the axial direction and communicates with the locking recess,wherein the limiting member includes a bar-shaped portion and an engagement protrusion provided in the bar-shaped portion,wherein a central part in a length direction of the bar-shaped portion is provided with the locking protrusion, and the bar-shaped portion is accommodated in and fixed to the holding groove in a ...

Foil Bearing, Method for Setting a Gap Geometry of a Foil Bearing, and Corresponding Production Method of a Foil Bearing

A foil bearing includes a bearing back, a foil arrangement, and a setting mechanism. The bearing back includes a passage opening configured to receive a shaft, such that a gap is formed between the shaft and the bearing back. The foil arrangement defines a first inner circumference and includes a first segment-shaped foil arranged in the gap adjacent to the bearing back, a second segment-shaped foil arranged in the gap adjacent to the first segment-shaped foil, and a third segment-shaped foil arranged in the gap between the shaft and the second segment-shaped foil. The setting mechanism is configured to set the first inner circumference. 1. A foil bearing , comprising:a bearing back including a passage opening configured to receive a shaft, such that a gap is formed between the shaft and the bearing back; a first segment-shaped foil arranged in the gap adjacent to the bearing back,', 'a second segment-shaped foil arranged in the gap adjacent to the first segment-shaped foil, and', 'a third segment-shaped foil arranged in the gap between the shaft and the second segment-shaped foil; and, 'a foil arrangement defining a first inner circumference and including'}a setting mechanism configured to set the first inner circumference.2. The foil bearing as claimed in claim 1 , wherein the setting mechanism includes a first screw enabling the foil arrangement to be positioned in an axial direction and/or a radial direction.3. The foil bearing as claimed in claim 1 , wherein the third segment-shaped foil encloses at least 340° between a first edge at a first end of the third segment-shaped foil and a second edge at a second end of the third segment-shaped foil.4. The foil bearing as claimed in claim 1 , wherein the setting mechanism is at least partially arranged in the bearing back.5. The foil bearing as claimed in claim 1 , wherein the setting mechanism includes a first end position and a second end position and is configured to be continually adjusted between the first end ...

RADIAL FORCE SUPPORT APPARATUS

A radial force support apparatus includes: a shaft coupled to an impeller and configured to rotate together with the impeller; and a foil radial bearing supporting the shaft. The foil radial bearing includes a top foil disposed on an inner circumferential surface of the foil radial bearing and facing at least a part of an outer circumferential surface of the shaft, and the shaft facing the top foil includes at least one groove provided on the outer circumferential surface of the shaft. 1. A radial force support apparatus comprising:a shaft coupled to an impeller and configured to rotate together with the impeller; anda foil radial bearing supporting the shaft,wherein the foil radial bearing comprises a top foil disposed on an inner circumferential surface of the foil radial bearing and facing at least a part of an outer circumferential surface of the shaft, andwherein the shaft facing the top foil comprises at least one groove provided on the outer circumferential surface of the shaft.2. The apparatus of claim 1 , wherein the at least one groove is formed in a curved line with respect to an axial direction of the shaft.3. The apparatus of claim 2 , wherein the at least one groove formed in the curved line has a shape that spirals on the outer circumferential surface of the shaft in a direction opposite to a rotation direction of the shaft.4. The apparatus of claim 1 , wherein the at least one groove is formed in a straight line.5. The apparatus of claim 4 , wherein the at least one groove formed in the straight line is inclined with respect to an axial direction of the shaft in a direction opposite to a rotation direction of the shaft.6. The apparatus of claim 1 , wherein a cross-section of the at least one groove has a semicircular shape claim 1 , a quadrangular shape or a triangular shape.7. The apparatus of claim 1 , wherein the at least one groove comprises an opening formed at each of opposite ends of the at least one groove claim 1 , andwherein each opening ...

THRUST SUPPORTING APPARATUS

A thrust supporting apparatus includes: a thrust runner configured to rotate integrally with a shaft; and a foil thrust bearing supporting an axial load of the shaft, the axial load being transmitted from the thrust runner. The foil thrust bearing includes a top foil facing a first surface of the thrust runner, and the thrust runner comprises first one or more grooves formed on the first surface. 1. A thrust supporting apparatus comprising:a thrust runner configured to rotate integrally with a shaft; anda foil thrust bearing supporting an axial load of the shaft, the axial load being transmitted from the thrust runner,wherein:the foil thrust bearing includes a top foil facing a first surface of the thrust runner, and the thrust runner comprises first one or more grooves formed on the first surface.2. The thrust supporting apparatus of claim 1 , wherein the first one or more grooves are formed as spirals.3. The thrust supporting apparatus of claim 2 , wherein the first one or more grooves are curved from an inner portion to an outer portion of the thrust runner in a radial direction of the shaft in an opposite direction of a rotational direction of the thrust runner.4. The thrust supporting apparatus of claim 1 , wherein the first one or more grooves are formed as straight lines.5. The thrust supporting apparatus of claim 4 , wherein the first one or more grooves formed as the straight lines extend along a radial direction of the thrust runner in a direction opposite to a rotational direction of the thrust runner.6. The thrust supporting apparatus of claim 1 , further comprising an additional foil thrust bearing claim 1 ,wherein:the additional foil thrust bearing includes a top foil disposed to a second surface opposite to the first surface of the thrust runner in an axial direction of the shaft,the second surface comprises second one or more grooves formed on the second surface of the thrust runner, andfirst extending directions of the first one or more grooves ...

Foil bearing and method for manufacturing thereof

A foil bearing (thrust foil bearing ( 40 )) includes a foil holder ( 41 ) and a plurality of foils ( 42 ) arrayed in a circumferential direction. Each of the foils ( 42 ) includes a body portion ( 42 a ) having a thrust bearing surface (S 2 ) and an extended portion ( 42 b ) extending from the body portion ( 42 a ) to a radially outer side. An end portion ( 42 d ) of the body portion ( 42 a ) of each of the foils ( 42 ) on one circumferential side is arranged so as to be overlapped on the body portion ( 42 a ) of adjacent one of the foils ( 42 ). The extended portions ( 42 b ) of the plurality of foils ( 42 ) are fixed onto the same plane of the foil holder ( 41 ).

FOIL BEARING ASSEMBLY

The bearing assembly comprises a radial foil bearing and an axial foil bearing, a control bearing preload device for controlling stiffness of the bearing under normal operating conditions, an electromagnetic unloading device for decreasing amplitude of rotor oscillations and an unloading means for increasing the ultimate bearing load without damaging bump foils. The radial foil bearing comprises a bushing providing accommodating bearing misalignment with respect to the journal, an elastic member in the form of an elastic damping unit for increasing damping, which consists of a bump foil and two smooth foils and . The bump foils in the bearing have different heights and alternate in the axial direction to decrease wear under start/stop. A top foil of the bearing is weldlessly retained within slots of mounting bars and . The axial bearing has the bump foil with ridges circumferentially extended in order for the bearing to work in sealing mode. The top foils of the bearing are provided with circumferential slits in order to decrease thermal stress. 1. A foil radial bearing to provide a rotor rotation relative to a housing member comprising a journal disposed within a bore of a bushing ,the bushing disposed between the journal and the housing member and having a first part and a second part and capable to change a radial disposition of said first bushing part relative to said second bushing part under the action of a force,a top foil disposed between the journal and the bushing, an elastic member disposed between the top foil and the bushing,a control bearing preload device mounted to the housing member and including a movable part receiving a load from the second bushing part and having a capability to radially displace the second bushing part relative to the first bushing part to vary a bearing preload under normal operating conditions.2. The foil bearing of claim 1 , wherein to transmit a load from said bushing to said movable part of the control bearing preload ...

Foil Segment Bearing, Method for Setting a Gap Geometry of a Foil Segment Bearing and Corresponding Production Method

A foil segment bearing comprises a bearing backing with a through opening. A shaft is arranged in the through opening such that a gap exists between the shaft and the bearing backing. The foil segment bearing also has at least one first bearing segment and one second bearing segment with respective inner surfaces. Each of the respective inner surfaces defines a bearing surface with an adjustable circumference. The bearing segments are arranged in the bearing backing at a distance from the shaft such that a gap exists between the shaft and the bearing segments. The foil segment bearing also has a foil arrangement arranged in the gap between the inner surfaces of the bearing segments and the shaft. The foil segment bearing also has an adjustment mechanism configured to set a geometry of the gap. 1. A foil segment bearing , comprising:a bearing back with a passage opening, the passage opening configured to receive a shaft arranged therein such that there is a gap between the shaft and the bearing back;at least one first bearing segment and one second bearing segment, each of the bearing segments having a respective inner surface defining a bearing surface with an adjustable circumference, each of the bearing segments configured to be arranged in the bearing back in a manner spaced apart from the shaft such that there is a gap between the shaft and each of the bearing segments;a foil arrangement arranged in the gap between the inner surfaces of the bearing segments and the shaft; andat least one setting mechanism configured to set a geometry of the gap via a radial positioning of the bearing segments.2. The foil segment bearing as claimed in claim 1 , wherein:the at least one setting mechanism includes a spring and a pin,the spring is configured to be positioned in an axial direction by the pin, andthe spring has a dynamic spring hardness.3. The foil segment bearing as claimed in claim 1 , wherein:the at least one setting mechanism is a plurality of setting mechanisms; ...

FOIL BEARING PROGNOSTIC HEALTH SENSOR

Disclosed is a foil bearing that includes a housing, a support structure associated with the housing, and a foil circumscribed at least in part by the support structure and spaced from the housing by the support structure. The foil includes a body section having a body material composition. The foil includes a sensor section having a conductive material composition, the sensor section having a circumferential portion surrounded at least in part by the body section. The foil includes a tab section that protrudes into the support structure and defines a first terminal and a second terminal associated with the sensor section. 1. A foil bearing comprising:a housing;a support structure associated with the housing; and a body section having a body material composition,', 'a sensor section having a conductive material composition, the sensor section having a circumferential portion surrounded at least in part by the body section, and', 'a tab section that protrudes into the support structure and defines a first terminal and a second terminal associated with the sensor section., 'a foil circumscribed at least in part by the support structure and spaced from the housing by the support structure, the foil including'}2. The foil bearing of claim 1 , wherein the circumferential portion extends in a circumferential direction about the foil and the tab section is configured to prevent movement of the foil in the circumferential direction about the support structure.3. The foil bearing of claim 1 , wherein the conductive material composition includes a first metallic conductor material disposed distinctly from a second conductor material joined to form a thermocouple of the sensor section about the circumferential portion.4. The foil bearing of claim 1 , wherein the conductive material composition is homogenous.5. The foil bearing of claim 4 , wherein the sensor section forms a speed sensor configured to conduct current induced from magnetic fields.6. The foil bearing of claim 4 , ...

AERODYNAMIC FOIL BEARING

This aerodynamic foil bearing has a sleeve () inside which are arranged: 14. Aerodynamic foil bearing having a sleeve () inside which are arranged:{'b': '16', 'a foil referred to as the top foil (), and'}{'b': 14', '16', '4, 'a bump foil () arranged between the top foil () and the sleeve (), and'}{'b': 12', '4', '14, 'a foil () of viscoelastic material arranged between an inner face of the sleeve () and the bump foil ().'}2181214. The aerodynamic foil bearing according to claim 1 , further comprising a protective foil () arranged between the foil () of viscoelastic material and the bump foil ().318. The aerodynamic foil bearing according to claim 2 , wherein the protective foil () is made of a nickel-based alloy containing chromium.441012. The aerodynamic foil bearing according to claim 1 , wherein the inner face of the sleeve () comprises a longitudinal rib () of a thickness substantially corresponding to the thickness of the foil () of viscoelastic material.514410. The aerodynamic foil bearing according to claim 4 , wherein the bump foil () has two longitudinal edges relative to the sleeve () claim 4 , one edge forming a free end and the other edge being fixed to the longitudinal rib ().6. Turbomachine claim 1 , comprising an aerodynamic bearing according to .7. Air conditioning device claim 1 , comprising an aerodynamic bearing according to . The present invention relates to an aerodynamic foil bearing.An aerodynamic bearing, or air bearing, is a bearing that supports the load it is subjected to via a pressurized mass of air that is introduced between a rotor rotating at high speed and a stator. Bearings of this type are used, for example, in applications in which the rotors rotate at high speeds, where loads are generally limited and/or high precision is required. The use of air instead of a fluid such as oil to create lubrication between the rotor and stator serves to limit the power dissipated by fluid friction, because the viscosity of air is much less than ...

FOIL BEARING

The present invention provides a foil bearing (), including: a top foil portion (Tf); and a back foil portion (Bf), which is arranged on a back of the top foil portion (Tf), and is configured to elastically support the top foil portion (Tf), wherein the back foil portion (Bf) includes: an intermediate portion () being flat; first projecting portions () projecting on a front side of the intermediate portion (); and second projecting portions () projecting on a back side of the intermediate portion (). 1. A foil bearing , comprising:a top foil portion having a bearing surface opposed to a shaft to be supported; anda back foil portion, which is arranged on a back of the top foil portion, and is configured to elastically support the top foil portion,wherein the foil bearing is configured to support relative rotation of a shaft in a non-contact state with a fluid film generated in a bearing gap between the shaft and the bearing surface, an intermediate portion being flat;', 'first projecting portions projecting on a front side of the intermediate portion; and', 'second projecting portions projecting on a back side of the intermediate portion., 'wherein the back foil portion comprises2. The foil bearing according to claim 1 , wherein the first projecting portions and the second projecting portions are arrayed intermittently at least in a relative rotation direction of the shaft and in a direction orthogonal to the relative rotation direction along the bearing surface.3. The foil bearing according to claim 1 , wherein the back foil portion comprises:a high-density region in which the first projecting portions and the second projecting portions are densely distributed; anda low-density region in which the first projecting portions and the second projecting portions are sparsely distributed.4. The foil bearing according to claim 1 , wherein the first projecting portions claim 1 , the second projecting portion claim 1 , or both the first projecting portions and the second ...

AIR BEARING ARRANGEMENT FOR ELECTRICALLY DRIVEN COMPRESSORS

An air foil bearing for supporting a high speed rotating assembly such as in a turbocharger, a high speed centrifugal separator or the like. The foil bearing includes at least one bump foil and at least one top foil. The top foil leading edge is bent radially outwards forming a bevel or step. This feature serves as an air guide to prevent air of the preceding pad flowing into the gap between the pads, and thence between the bump foil and the top foil, causing the top foil to bear against the rotor, causing severe wear. 1. A foil bearing , comprising:{'b': '3', 'a bush () having an axial bore;'}{'b': 4', '4', '3, 'i': 'a', 'at least one bump foil () having a leading edge () and a trailing edge, having undulations between the leading and trailing edge, and anchored at the leading edge to the bush ();'}{'b': 5', '5', '5', '3, 'i': a', 'a, 'a top foil () having a leading edge and a trailing edge (), and anchored at the trailing edge () to the bush (),'}{'b': '5', 'wherein the top foil () has, in a non-tensioned state, a larger diameter than the shaft diameter,'}wherein the top foil, after assembly of the foil bearing, is in a tensioned state, andwherein a bevel or step is formed in the free leading edge of the top foil.24. The foil bearing of claim 1 , wherein the undulations in the bump foil () are nearly uniform.34. The foil bearing of claim 1 , wherein the undulations in the bump foil () differ by no more than one-half the wave length of the undulations over the circumference of the bump foil.44. The foil bearing of claim 1 , wherein the undulations in the bump foil () differ by no more than one-half the wave height of the undulations over the circumference of the bump foil.5. The foil bearing of claim 1 , wherein said bevel or step is ramp shaped.6. The foil bearing of claim 1 , wherein said bevel or step step-shaped.7. The foil bearing of claim 1 , wherein said bevel or step is concave or convex curved shaped.8. The foil bearing of claim 1 , wherein said bevel or ...

High temperature use of a self lubricating coating material in a foil bearing and part coated with such a material

High temperature use of a self lubricating coating material in a foil bearing and part coated with such a material. A material according to the disclosure includes between 50 and 90 wt % of alumina (Al2O3), as well as an oxide selected from the group consisting of titanium oxide (TiO2), chromium oxide (Cr2O3), and a mixture of these. Application to a rotor and/or a thrust disc at least partially covered with such a material.

FOIL BEARING

A foil bearing for supporting a shaft includes a sleeve-type baring housing, at least one elastic corrugated foil arranged on the inner circumference of the bearing housing, and a respective top foil covering each corrugated foil and forming a bearing surface. The bearing housing includes insertion grooves defined therein that extend from the inner surface of the bearing housing and outwardly. The fop foil and the corrugated foil each have ends that are inserted into and received by the insertion grooves. 1. A foil bearing for supporting a shaft , said bearing comprising ,a sleeve-type bearing housing;at least one elastic corrugated foil arranged on an inner circumference of the bearing housing; anda respective top foil covering each of the at least one elastic corrugated foil, secured to the inner circumference of the bearing housing, and forming a bearing surface;wherein insertion grooves are formed in the inner circumference of the bearing housing, the insertion grooves extending along surface lines, running obliquely outwardly and holding at least the two end edges of the top foil which delimit the top foil in a circumferential direction and which run substantially in the circumferential direction.2. The foil bearing according to claim 1 , wherein a depth of the insertion grooves is greater than the an insertion depth of the end edges claim 1 , and that and the insertion grooves hold the end edges with a sliding fit.3. The foil bearing according to claim 1 , wherein the at least one corrugated foil is delimited in the circumferential direction by end edges which are substantially in parallel contact with the associated top foils claim 1 , the insertion grooves are configured such that they hold the end edge pairs in parallel contact with one another with a sliding fit.4. The foil bearing according to wherein one of the insertion grooves is provided with one or more thread holes penetrating a wall of the bearing housing claim 1 , said thread holes receiving one ...

High load capacity hybrid foil bearing

A bearing includes a bearing sleeve with a first portion and a second portion adjacent to the first portion. A bump foil extends along an inner face of the first portion of the bearing sleeve and a metal mesh extends along an inner face of the second portion of the bearing sleeve. A top foil extends along an inner face of the bump foil of the first portion and the metal mesh of the second portion.

AIR FOIL BEARING

An air foil bearing includes a bearing housing having a cylindrical shape that forms an accommodation space in a middle thereof for a rotating shaft, rotor, or journal; a first foil including a plurality of bump foils, which are arranged along an inner wall surface of the accommodation space of the bearing housing; and a second foil including a plurality of top foils, which are arranged in a circumferential direction along an inner circumference of the bearing housing to correspond to the plurality of bump foils and to support the rotating shaft, rotor, or journal. A portion of at least one of the plurality of top foils of the second foil is thicker than the other top foils of the plurality of top foils. 1. An air foil bearing comprising:a bearing housing having a cylindrical shape that forms an accommodation space in a middle thereof for a rotating shaft, rotor, or journal;a first foil including a plurality of bump foils, which are arranged along an inner wall surface of the accommodation space of the bearing housing; anda second foil including a plurality of top foils, which are arranged in a circumferential direction along an inner circumference of the bearing housing to correspond to the plurality of bump foils and to support the rotating shaft, rotor, or journal,wherein a portion of at least one of the plurality of top foils of the second foil is thicker than the other top foils of the plurality of top foils.2. The air foil bearing of claim 1 , wherein a coupling body, which is coupled to a respective key slot that is provided on the inner circumference of the bearing housing,', 'a first region, which is placed on a top surface of at least one of the plurality of bump foils, connected to the coupling body of the top foil, and', 'a second region, which is elastically bent from an end of the first region of the top foil and is exposed to be in contact with the rotating shaft, rotor, or journal, the second region of the top foil overlapped by the first region of a ...

Bearing for supporting a rotating compressor shaft

A compressor includes a housing, a shaft that is rotated relative to the housing to compress a working fluid, and a foil bearing that supports the shaft. The foil bearing includes a top foil. The foil bearing is a foil gas bearing that is backed up by a ball bearing, or a mesh foil bearing with an actuator to compress a wire mesh dampener. A heat transfer circuit includes a compressor and a working fluid. The compressor includes a shaft that is rotated to compress the working fluid, and a foil bearing for supporting the shaft as it rotates.

RADIAL FOIL BEARING

A radial foil bearing of the present disclosure includes a bearing housing that has an insertion hole into which a rotary shaft is inserted, a base sheet that is disposed in the insertion hole, a back foil that is supported by the base sheet and has unevenness in a radial direction of the insertion hole, and a top foil that is supported by the back foil. The base sheet has a branch deviated in the radial direction of the insertion hole, and is engaged with at least one of the bearing housing, the back foil, and the top foil. 1. A radial foil bearing comprising:a bearing housing that has an insertion hole into which a shaft is inserted;a base sheet that is disposed in the insertion hole;a back foil that is supported by the base sheet and has unevenness in a radial direction of the insertion hole; anda top foil that is supported by the back foil,wherein the base sheet has a branch deviated in the radial direction of the insertion hole, and is engaged with at least one of the bearing housing, the back foil, and the top foil.2. The radial foil bearing according to claim 1 ,wherein the back foil has a notch in an end edge in an axial direction in which the insertion hole extends, andan extension portion extending from the branch of the base sheet is inserted in the notch.3. The radial foil bearing according to claim 2 ,wherein on an inner peripheral side of the back foil passing through the notch, the extension portion extends to any one side in a circumferential direction of the insertion hole.4. The radial foil bearing according to claim 3 ,wherein the base sheet includesa first base sheet that has the extension portion and a notch in an end edge in the axial direction, anda second base sheet that supports the first base sheet and has a second extension portion inserted into the notches of the first base sheet and the back foil, andon the inner peripheral side of the back foil, the second extension portion extends to the other side in the circumferential direction of ...

Dynamic pressure gas bearing mounting structure

Gas static pressure and dynamic pressure bearing