Способ снижения пульсации многоплунжерной насосной системы и устройство для его осуществления

Группа изобретений относится к способу снижения пульсации многоплунжерной насосной системы и к многоплунжерной насосной системе. В способе соединяют параллельно три трехплунжерных насоса 3, 3’, 3”, расположенных в ряд и работающих от одного приводного вала двигателя 2. Фазовый сдвиг работы плунжеров у каждого последующего насоса относительно предыдущего осуществляют на 40 град. Между насосами устанавливают муфту 5, закрепленную на общей раме 1. Каждый насос обвязывают в одну выкидную линию. Система содержит установленные на раме 1 электродвигатель 2 с трехплунжерным насосом 3, состоящим из механической и связанной с ней гидравлической частей. Механическая часть насоса 3 включает редуктор 4 и кривошипно-шатунный механизм, имеющий коленчатый вал, шатуны и соединенные с плунжерами ползуны, оси которых расположены в чередующейся последовательности с взаимным сдвигом фаз на 120 град. по обе стороны от плоскости, проходящей через ось коленчатого вала. Насос 3 параллельно соединен с двумя трехплунжерными ...

Способ увеличения равномерности подачи поршневого насоса

Изобретение относится к насосостроению, в частности к способу увеличения равномерности подачи поршневого насоса, и может найти применение в нефтегазовой и горной промышленностях. Способ увеличения равномерности подачи поршневого насоса включает корректировку мгновенной подачи насоса в зависимости от мгновенных значений угла ϕ поворота коленчатого вала и угловой скорости ω его вращения. Согласно изобретению предварительно вычисляют величину средней подачи многоцилиндрового поршневого насоса Qср, рассчитывают величину мгновенной подачи насоса и постоянно поддерживают равенство Q = Qср, для чего с помощью регулируемого привода корректируют величину мгновенной угловой скорости ω вращения коленчатого вала во время одного поворота на угол ϕ. Изобретение направлено на снижение циклических нагрузок, вибрации, шума, а также на повышение надёжности работы оборудования за счёт снижения пульсаций давления в рабочих камерах насоса, присоединенных к насосу трубопроводах, трубопроводной арматуре и элементах ...

МОЛОКООТСОС

FIELD: medical equipment.SUBSTANCE: pressure pulsations damper for a fluid extraction system, comprising: a wall enclosing the main volume, at least two inlet openings, arranged in wall and made with possibility of connection with fluid media extraction units, at least two outlet holes, arranged in wall and made with possibility of connection with pump units, and at least one flexible element, arranged in the main volume in order to divide the main volume into at least two secondary volumes, each secondary volume forming a channel between at least one inlet opening and at least one outlet opening, wherein the flexible member is configured to bend to the secondary volume, located at lower pressure, and retaining element to limit bending of flexible element, note also that every secondary volume is formed by walls of flexible tube located nearby external non-rigid wall. Fluid pumping system, comprising: a pump comprising at least one inlet opening and at least one outlet opening, and a pressure pulsation damper as per any of the preceding claims.EFFECT: technical result of claimed invention consists in reduction of pressure pulsations level.12 cl, 12 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 727 245 C1 (51) МПК A61M 1/06 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК A61M 1/06 (2020.02) (21)(22) Заявка: 2018115997, 16.09.2016 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): КОНИНКЛЕЙКЕ ФИЛИПС Н.В. (NL) Дата регистрации: 21.07.2020 29.09.2015 EP 15187249.6 (45) Опубликовано: 21.07.2020 Бюл. № 21 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 03.05.2018 (86) Заявка PCT: 2 7 2 7 2 4 5 R U (87) Публикация заявки PCT: WO 2017/055109 (06.04.2017) C 1 C 1 EP 2016/072006 (16.09.2016) 2 7 2 7 2 4 5 (56) Список документов, цитированных в отчете о поиске: US 2013098456 A1, 25.04.2013. US 5167620, 01.12.1992. US 2951450, 06.09.1960. US 2001038799 A1, 08.11.2001. US ...

HYDROSTATISCHE MASCHINE MIT AXIALEM SCHUBAUSGLEICH

Peristaltic pump

A peristaltic pump comprising (i) two fluid flow tubes 10 and 11 or 2A and 2B; (ii) two pressure members 15 and 16 or 4A and 4B operable to urge fluid flow through the tubes, the pressure members being mounted on a common rotatable element 19 and operating with a phase difference between their respective movement cycles; and (iii) a non-
return valve 12, 13 or 5A, 5B in each tube downstream of its region of contact with the associated pressure member. The valves prevent, or at least reduce reverse flow and allow forward flow through the tube only above a threshold differential pressure. The arrangement being such that the first valve opens at a differential fluid pressure corresponding to that at which the second pressure member releases the second tube and the second valve opens at a differential fluid pressure corresponding to that at which the first pressure member releases the first tube, so that the opening of the first valve coincides with cessation of flow in the second tube.

Double-acting reciprocating downhole pump

PUMPING DEVICE AND PROCESSES

... 1450400 Reciprocating pumps ICI AUSTRALIA Ltd 17 Sept 1973 [22 Sept 1972 8 June 1973] 43475/73 Heading F1A A pump for supplying a liquid or gas at a constant flow-rate, e.g. for chromatographic apparatus, or metering liquid additive into a molten polymer stream for welt spinning fibres, comprises two pumps 28, 29 operating out of phase one pump performing its suction stroke and then operating at constant pressure against a closed delivery valve while the other pump effects its delivery stroke through an open delivery valve, the delivery valve of the one pump then being opened as the delivery valve of the other pump is closed, to provide a continuous pulse-less delivery, part of the force effecting the piston delivery stroke being provided by a fluid drive, e.g. a pneumatic piston motor 34, 35, and the remainder of the force being provided by a mechanical drive, e.g. a variable-speed electric motor-driven cam 26, 27 acting via the piston motor piston-rod, the suction strokes of the pump ...

PROCEDURE FOR THE CONTROLLING OF A CYCLICALLY KOMMUTIERTEN HYDRAULIC PUMP

PROCEDURE FOR THE CONTROLLING OF A CYCLICALLY KOMMUTIERTEN HYDRAULIC PUMP

STEERING METERING PUMP

CONCRETE PUMPING DEVICE.

PUMPING MECHANISM.

OPPOSED PISTON HYDRAULIC SLURRY PUMP WITH FLOW CONTROL VALVE

DOUBLE-ACTING RECIPROCATING DOWNHOLE PUMP

A positive displacement pump for pumping fluids from a downhole formation to the earth's surface is provided. The pump (100) first comprises a plunger (130). The plunger is reciprocated axially within the wellbore by a linear actuator (300), such as a submersible electrical pump, in order to form an upstroke and a downstroke. A pump inlet (140) is disposed near the bottom end of the plunger, while a pump outlet (150) is disposed near the top end of the plunger. The pump is configured such that it is able to pump a first volume of fluid upward within the wellbore during the pump's upstroke, and a second volume of fluid upward within the wellbore during the pump's downstroke. Thus, the pump is "double-acting.

CONSTANT-FLOW-RATE DUAL-UNIT PUMP

TITLE Constant-Flow-Rate Dual-Unit Pump A dual-unit pump, e.g., a rolling diaphragm piston pump, suitable for pumping an abrasive highviscosity slurry, is adapted to operate at a constant flow rate by means for detecting and correcting a pressure differential in the two units before the units switch from the pumping cycle to the filling cycle and vice versa. The flow of liquids is controlled by valves of the type which switch the flow to and from the units with essentially no volume change in the liquid inlet and outlet lines.

OSCILLATING-DEFLECTOR PUMP

Disclosed is a wear-resistant high pressure pump for the handling of, particularly, abrasive slurries and suspensions, and which eliminates the problem of valve shear of the pressurized discharge product. An oscillatingdeflector slurry pump comprises a pair of cylinder arrangements aligned one on either side of a centrally-disposed oscillating-deflector element. Each cylinder arrangement is constituted by a housing in which are defined co-axial, registering hydraulic and slurry cylinder bores, and a piston rod having, at one end thereof, a hydraulic piston head slidably movable within the hydraulic cylinder bore and having, at the other end thereof, a slurry piston head slidably movable within the slurry cylinder bore. The oscillating-deflector element has within it passageways enabling communication, alternately, between a slurry inlet conduit and a first one of the two slurry cylinders, and between the slurry inlet conduit and a second one of the two slurry cylinders. The second slurry ...

FLUID DRIVEN MUD PUMP

A fluid driven mud pump with a pump body including a fluid drive cylinder axially aligned with a first mud cylinder and a second mud cylinder. The fluid drive cylinder has a first end, a second end, and a double acting reciprocating piston with a first end of the piston positioned in the first mud cylinder and a second end of the piston positioned in the second mud cylinder. As the first end of the piston forces liquid from the first mud cylinder, liquid is concurrently drawn into the second mud cylinder. As the second end of the piston forces liquid from the second mud cylinder, liquid is concurrently drawn the first mud cylinder. In order to further reduce pressure pulsations a group of pump bodies are formed into a single pumping unit with each of the pump bodies operating out of phase to provide a constant sequential discharge.

Differentialplungerpumpe.

Flüssigkeitspumpe.

Dosier-Kolbenpumpe

Dosier-Kolbenpumpe

MECHANISM TO THE ESSENTIALLY EVEN ONE PROMOTING A FLUID MEDIUM OF MEANS AND WORKING PROPELLED FOERDERKOLBEN.

Ultrahigh printing syringe pump system for the gradients enterprise within the range of the HPLC.

Die Erfindung beschreibt ein Ultra-Hochdruck-Spritzenkolbenpumpensystem für die Anwendung im Bereich der HPLC, Ultra-, mikro- und nano- HPLC, im Gradientenbetrieb. Die unterschiedlichen Lösungsmittel werden durch passive Rückschlagventile (18, 29) unabhängig komprimiert, die Lösungsmittelzusammenführung erfolgt erst bei gleichem Druck, der Zieldruck für die Initialisierung wird durch eine Regelvorgabe mit höherer Förderleistung erreicht, bei der auch die Kompressibilität berücksichtigt wird. Das Ändern von Lösungsmitteln sowie das Spülen der Pumpenköpfe (20, 32) erfolgt durch getrennte Ein- und Ausgänge im Durchfluss über ein aktives Multipositions-Hochdruckventil (10, 42), welches auch den Pumpenkopf (20, 32) verschliessen und über das passive Rückschlagventil (18, 29) öffnen kann. Die Reglereinheit und der Antriebsmotor (1, 37), welcher auch als Kraftsensor dient, erfasst Kompressibilität, Lufteinschlüsse und Undichtigkeiten. Je nach Ausführung werden die Ultra-Spritzenpumpenköpfe thermisch ...

Electronic camshaft motor control for piston pump

A two (or more) piston pump system (10) is provided with both pumps (12) being crank (14) driven. The system does not have a mechanical camshaft, but a software algorithm, which acts like one in controller (20). The algorithm will learn and create a unique speed profile, which will mimic the mechanical camshaft. For practical purposes the speed profile of output gear is called Cam profile with software acting as an imaginary camshaft. The algorithm utilizes Crank Angle Estimation, Learn Curve Generation, Smoothing and Advance Timing Calculation.

Method and device for desalinating water while overcoming decreases in pressure

Improvements in the pumps

COMPRESSOR, AIRBRUSH COMPRESSOR POWERED THEREBY, AND APPARATUS COMPRISING THE SAME

FEED PUMP OF A SYSTEM FOR APPLYING A PRODUCT COATING LIQUID

Cette pompe (1) d'alimentation d'un système d'application d'un produit de revêtement liquide comprend un moteur (3) actionnant au moins deux pistons, un tambour (9) entrainé en rotation par le moteur (3), le tambour comprenant une surface cylindrique externe (90) présentant un profil de came (92), chacun des pistons étant solidaire d'une tige (51, 61) sur laquelle est fixée un galet (53, 63) roulant sur le profil de came (92) de telle manière que le galet lié à chacun des pistons via une des tiges est entraîné en translation selon l'axe (X-X') de translation du piston correspondant sous l'action de la rotation du tambour (9). Chacun des galets est en contact avec le profil de came à une position décalée angulairement par rapport à la position des autres galets de telle manière que l'un des pistons soit en cours de mouvement lorsqu'un autre piston atteint un point d'inversion de son sens de mouvement. La pompe comprend des moyens de compensation (10) adaptés pour accélérer l'un des pistons ...

Compresseur, aerographe alimente par ce compresseur, et appareil les comportant

L'invention concerne les compresseurs et les aerographes. Elle se rapporte a un appareil de pulverisation comprenant un compresseur portatif 10 alimente par une batterie d'accumulateurs et dans lequel un petit moteur provoque la compression alternative de soufflets qui transmettent un debit pratiquement regulier d'air comprime a un aerographe 20 dans lequel un organe de commande 20 limite la course d'une detente 70 de maniere que le debit obtenu soit precis et reproductible. Application aux aerographes et a leurs compresseurs.

AIR PUMP, PUMP SYSTEM, ELECTRONIC BLOOD PRESSURE GAGE, AND MASSAGER FOR PROVIDING THE AIR PUMP HAVING A SIMPLE STRUCTURE

PURPOSE: An air pump, a pump system, an electronic blood pressure gage, and a massager are provided to reduce the size and weight of the electronic blood pressure gage. CONSTITUTION: An air pump comprises an elastomer or a polymer(1a), a hollow actuator(1), a suction portion(2a), and a discharge portion(3a). The elastomer or polymer is prolonged or contracted by applying a voltage. The actuator has an electrode(1b) adapted to apply the voltage to the elastomer or polymer. A fluid is sucked into the interior of the hollow actuator by the suction portion. The fluid is discharged outside the hollow actuator by the discharge portion. © KIPO 2006 ...

OPERABLE PUMP TRIPLEX BY FLUID

PERISTALTIC PUMP

The peristaltic pump (1) comprises a housing (3) provided internally with a recess (4) for receiving the deformable tube (2) and rolling tracks (5) surrounding said recess against which can press and roll the rollers (6) designed for compressing and closing that part of the tube located in the zone of contact of the rollers with the rolling tracks. The pump comprises, inside the housing (3), at least two independent arcs (10, 11) of the deformable tube, extending on different angular ranges and arranged so that the variations in the flow of each basic pump corresponding to an angular arc (110, 11) are phase-shifted, whereby the inlets (12, 15) and back flows (13, 14) of the independent arcs (10, 11) are respectively connected so that the total flow of the pump consisting of the sum of the flows of the basic arcs has reduced variations.

Concrete-pumping device

Concrete-pumping device comprising a frame (16), a number of pump cylinders (6-9) mounted on the frame (16) which comprise a pump opening close to one end, sealed pump pistons (10) which are guided slidably in the pump cylinders (6-9) toward and away from the pumping device and which are each coupled for reciprocal driving to the plunger (11) of a coaxially arranged hydraulic jack (14), hydraulic switching means for cyclically feeding to and discharging from the jack (14) hydraulic oil under pressure such that the plunger (11) causes the reciprocating movement of the pump piston (10) and concrete switching means for alternately placing the pump opening in communication with a feed funnel (3) and a pressure conduit (4) for concrete synchronously with the movement of the pump piston (10) in order to pump concrete out of the feed funnel (3) into the pressure conduit (4). This comprises at least three pump cylinders (6-9) with associated hydraulic jacks (14) and the hydraulic pump cylinders ...

Fluid pump

Fluid pump

Apparatus for continuous supply of high-pressure fluid

Apparatus for continuous supply of high-pressure fluid comprises pressure- intensifying pumps with pressure- intensifying cylinders 1 and 2 within which operate pistons or rams 3 and 4 respectively. They feed, through non- return discharge ports 13 and 14, a common gathering chamber 17. If desired, two or more separate such chambers 17 can be used. The, or each, chamber 17 feeds through another non- return valve 18 the supply duct 19 provided with accumulator 20. Use of such a gathering chamber 17 reduces noise and gives smoother operation by absorbing sudden impact pressure changes at piston extreme positions. ...

A pump and an energy recovery apparatus for a refrigeration system

A pump 10 for a refrigeration system 100, which comprises two chambers 12a, 12b, each connected to an inlet line 20 and an outlet line 24. First valves 30a, 32a and second valves 30b, 32b bring the first chamber 12a and the second chamber 12b respectively in fluid communication with gas at a pressure comparable to pressure in the inlet line or with gas at a pressure comparable to pressure in the outlet line. Pressure equalisation means, e.g. a valve 34, selectively equalises fluid pressure in the two chambers. The valves 30a, 32a, 30b and 32b may be actuated by a controller responsive to signals from level sensors, so that the two chambers are alternately filled and emptied. The pressure in the chambers is preferably equalised before the filling and emptying modes are switched between them. An energy recovery apparatus is also claimed, comprising a turbine 112 mounted between the compressor 104 and the condenser 106 of the refrigeration system and a pump as described above. The pump is ...

PISTON PUMP AND OPERATING PROCEDURE FOR THIS

MULTI-CYLINDER MACHINE, LIKE A PUMP OR A COMPRESSOR, WITH IMPROVED OSCILLATION CHARACTERISTICS

Method and device for dosing pumping

Aspirator and coating device used for liquid curtain

Pump system for liquid/solid materials with balanced output

A pump system, particularly suitable for pumping wet mixes and slurries, achieves an output of pumped material substantially free from pulsations or fluctuations by control movement of power pistons (12A,12B) within power cylinders (10A, 10B). The power pistons (12A,12B) are connected by piston rods (14A,14B) to pumping pistons (16A,16B) which suck material to be pumped in through valves (20A,20B) and out through valves (22A,22B) into a delivery pipe (26). A closed loop (32) connects annular chambers (13A,13B) of the power cylinders (10A,10B), and a continuously operating pump (P2) feeds the closed loop (32). The power pistons (12A,12B) on their suction strokes move faster than on the delivery strokes, whereby one or other or both pistons (12A,12B) are always moving forwards. Control adequate to achieve a smooth delivery of pumped material is achieved by providing sensing valves (PVA1,PVA2, PVB1,PVB2) on each power cylinder (10A,10B), these valves being arranged to be actuated at different ...

Method and device for desalinating water while overcoming decreases in pressure

The invention concerns a method of and an apparatus for continuously desalinating water by reverse osmosis, in particular desalinating sea water, wherein salt water is introduced under a first pressure by means of a delivery pump into a pressure compensating device, salt water is continuously introduced from the pressure compensating device at a second increased pressure into a membrane module and separated therein by means of a membrane into desalinated water and concentrated salt water, and the concentrated salt water discharged from the membrane module is continuously introduced under approximately the second pressure into the pressure compensating device and used there for acting with approximately the second pressure on the salt water introduced into the pressure compensating device and for introducing the salt water into the membrane module. In order to avoid disturbances in operation and possibly damage to the membrane because of a reduced flow over the membrane surface, it is provided ...

OSCILLATING FLOW FREEZER

A freezer for a product includes a housing having a sidewall defining a chamber in the housing, and an inlet and an outlet in communication with the chamber; and a pair of pistons operatively associated with the housing and in communication with the chamber, the pair of pistons operable out of phase with each other for oscillating a gas flow within the chamber. A method is also provided for reducing a temperature of a product in a freezer.

Operating mehtod for fluid working machine

A fluid working machine (1) has several working chambers (5) of cyclically changing volume. For pumping hydraulic fluid, the inlet and outlet valves (8, 9) are electrically actuated. The timing of the actuation of said electrically actuated valves (8, 9) is varied depending on the fluid flow demand.

ROTARY PISTON PUMP FOR METERING A COATING AGENT

НАСОС ВЫСОКОГО ДАВЛЕНИЯ ДЛЯ НАГНЕТАНИЯ ВЫСОКОВЯЗКОГО МАТЕРИАЛА

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2017 132 299 A (51) МПК F04B 9/04 (2006.01) F04B 15/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2017132299, 29.01.2016 (71) Заявитель(и): КАРЛАЙЛ ФЛУИД ТЕКНОЛОДЖИЗ ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 18.02.2015 GB 1502686.7 09 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 18.09.2017 GB 2016/050202 (29.01.2016) (87) Публикация заявки PCT: A WO 2016/132097 (25.08.2016) Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" R U (57) Формула изобретения 1. Насос объемного действия, выполненный с возможностью нагнетания текучей мастики, содержащий: несколько цилиндров, каждый из которых имеет поршень, выполненный с возможностью возвратно-поступательного движения внутри цилиндра, при этом перемещение поршня в первом направлении способно всасывать текучую среду в цилиндр, а движение во втором, противоположном направлении, способно нагнетать текучую среду из цилиндра; и электродвигатель с переменной скоростью, с возможностью передачи приводного усилия на кулачковый механизм, обеспечивающий возвратно-поступательное движение поршней, при этом кулачковый механизм содержит кулачки, имеющие форму и выполненные с возможностью приведения в движение каждого поршня в первом направлении менее чем за половину цикла вращения, и приведения в движение каждого поршня во втором направлении в течение оставшейся части цикла вращения, и при этом кулачки выполнены с возможностью приведения в движение поршней не синфазно по отношению друг к другу. 2. Объемный насос по п.1, содержащий три или более цилиндров, при этом кулачки выполнены с возможностью приведения в движение поршней так, что в любом Стр.: 1 A 2 0 1 7 1 3 2 2 9 9 (54) НАСОС ВЫСОКОГО ДАВЛЕНИЯ ДЛЯ НАГНЕТАНИЯ ВЫСОКОВЯЗКОГО МАТЕРИАЛА 2 0 1 7 1 3 2 2 9 9 (86) Заявка PCT: R U (43) Дата публикации заявки: 21.03.2019 Бюл. № (72) Автор(ы): ...

Pumpe

Improvements in or relating to pumps and other machines or engines employing the three-throw cycle

... 350,171. Fluid-pressure motors. HATHORN, DAVEY, & CO., Ltd. and LUPTON, H. R., Sun Foundry, Dewsbury Road, Leeds. May 2, 1930, No. 13523. [Class 122 (iii).] In a pump or motor the effect of three plung ers reciprocated by cranks at 120‹ is obtained by means of two plungers 1, 2 operated by cranks at 120‹ and working at their oute ends in separate cylinders 3, 4 and at their inner ends in a common chamber 6.

PROCEDURE AND DEVICE FOR THE ENTSALZEN OF WATER WITH DECREASE OF PRESSURE BYPASS

HYDROSTATIC MACHINE WITH AXIAL THRUST RECONCILIATION

PUMPEINRICHTUNG FÜR EINEN FLÜSSIGKEITSVORHANG UND STREICHEINRICHTUNG

Pumpeinrichtung für eine Flüssigkeit, die aus einer Abgabeeinrichtung in Form eines Flüssigkeitsvorhangs abgegeben und auf ein sich relativ zu dem Vorhang und durch den Vorhang hindurch bewegendes Material aufgetragen wird, wobei mindestens zwei Verdrängerpumpen (P1, P2, P3, P4; P5, P6) vorgesehen sind, von denen jede zyklisch ein veränderliches Volumen abwechselnd zwischen einem Maximalvolumen und einem Minimalvolumen maximiert und minimiert, wobei die Volumenminimierung jeder der Verdrängerpumpen (P1, P2, P3, P4; P5, P6) die zu pumpende Flüssigkeit zu der Abgabeeinrichtung hin fördert, und wobei die Verdrängerpumpen miteinander gekoppelt sind, um ihr Minimalvolumen zu verschiedenen Zeitpunkten einzunehmen.

Method and device for desalinating water while overcoming decreases in pressure

PUMP SYSTEMS.

METHOD AND HIGH PRESSURE SPRAYING PUMP FOR PUMPING LIQUID AND PASTE-LIKE STUFFS

HYDRAULICALLY POWERED TRIPLEX PUMP AND CONTROL SYSTEM THEREFOR

CONSTANT-FLOW-RATE DUAL-UNIT PUMP

POSITIVE DISPLACEMENT PUMP AND OPERATING METHOD THEREOF

The invention relates to a positive displacement pump (100), comprising a drive unit (1) and a pump unit (2) having several working chambers (4, 4'), several displacement elements (3, 3'), and at least three cylinders (5), preferably exactly three cylinders (5), wherein the pump unit (2) is double-acting. The invention further relates to a piston diaphragm pump forming a positive displacement pump, wherein a diaphragm stroke is caused by means of working liquid present on the first side of a diaphragm and a medium to be pumped is conducted through a diaphragm chamber bounded by the second side of the diaphragm due to the diaphragm stroke, and the diaphragm stroke is caused at a diaphragm position different from a vertical position of the diaphragm.

Liquid supply system

FEED PUMP OF A SYSTEM FOR APPLYING A PRODUCT COATING LIQUID

POMPE A DEUX GROUPES A DEBIT CONSTANT

POMPE A DEUX GROUPES A, B, TELLE QU'UNE POMPE A PISTON 3, 8 A DIAPHRAGME ROULANT 5, 10 CONVENANT AU POMPAGE DE BOUILLIES A HAUTE VISCOSITE ABRASIVES COMME LES COMPOSITIONS A BASE DE RESINE CHARGEES EN SOLIDES, UTILISEES POUR ANCRER LES BOULONS DE TOIT DANS LES MINES, PREVUE POUR OPERER A DEBIT CONSTANT EN DETECTANT ET CORRIGEANT UNE DIFFERENCE DE PRESSION DANS LES DEUX GROUPES AVANT QUE LES GROUPES PASSENT DU CYCLE DE POMPAGE AU CYCLE DE REMPLISSAGE ET VICE VERSA. LE DEBIT DES LIQUIDES DL, WL EST CONTROLE PAR DES VALVES E, F DU TYPE QUI FONT PASSER LE DEBIT VERS ET EN PROVENANCE DES GROUPES SANS CHANGEMENT DE VOLUME DANS LES CANALISATIONS D'ENTREE 15 ET DE SORTIE 19, 20 DU LIQUIDE.

Hydraulic piston machine

HYDRAULIC DEVICE Of AMPLIFICATION FOR a SYSTEM OF PUMPING HAS HIGH PRESSURE

L'invention concerne un dispositif d'amplification hydraulique pour un système de pompage à haute pression comprenant au moins : - un ensemble d'alimentation 100 en liquide basse pression Pb, - un ensemble dit cylindre-piston 200 en sortie transformant en un liquide haute pression, la basse pression de l'ensemble d'alimentation 100 , - un ensemble 300 dit d'utilisation de la pression hydraulique amplifiée, - un ensemble 400 d'évacuation en liquide basse pression Pb. Ce dispositif est remarquable en ce que le susdit système de pompage comprend au moins un deuxième ensemble cylindre-piston parallèle 200' qui, connecté au premier ensemble cylindre-piston dit principal 200), est piloté de manière décalée par rapport au premier ensemble cylindre-piston principal 200 au niveau des fins de course entre les deux ensembles tige-pistons de telle sorte que les moments d'inversion de déplacement (flèches D et D') des deux ensembles tige-pistons ne soient jamais simultanés.

OPERATING METHOD FOR FLUID WORKING MACHINE

A fluid working machine (1) has several working chambers (5) of cyclically changing volume. For pumping hydraulic fluid, the inlet and outlet valves (8, 9) are electrically actuated. The timing of the actuation of said electrically actuated valves (8, 9) is varied depending on the fluid flow demand.

Free piston pump

A pumping system which converts a source of gas under pressure to hydraulic fluid under pressure. The system includes three free floating pistons coupled through control valves to the pressurized gas source on one side and through appropriate check valves to hydraulic fluid on the other side. The pistons are reciprocated within respective cylinders by application of the pressurized gas to one side thereof and by application of the return pressure of the hydraulic fluid to the other side thereof. Appropriate porting on the gas side of the pistons sequentially applies the gas under pressure to the three pistons to synchronize reciprocation of them so as to provide a continuous flow of fluid under pressure, upon demand, to a load.

Hydraulic fluid pressurizer with fluid cushioning means

An improved water pressurizer comprises a pair of piston and plunger type intensifiers each driven by pressurized oil on one side of the piston and returned to the starting position by air pressure on the opposite side of the piston. Magnetic sensing switches detect proximity of the piston as it nears the end of a power or return stroke and send enabling signals to electropneumatic relays controlling air actuated ball valves on input and output oil lines. Because of the displacement volume and piston to plunger ratio, the intensifiers reciprocate at unusually low frequencies, reducing down time for maintenance or repair and thereby increasing reliability and capacity factor. Installed on a trailer for transportation, the apparatus can be attached to any available water supply for providing pressurized working fluid to a remote site.

High pressure reciprocating piston pump with two pistons - has system to eliminate pressure troughs in output flow, caused when alternately operating pistons reverse

The high pressure pump has at least two hydrostatic pressure driven reciprocating pistons (275,276), operating alternately to deliver fluid from at least two cylinders (277,278). The fluid is delivered at over 500 bar, at which pressures it is more than 1 percent compressible. A steady output flow, without pressure troughs when the pistons reverse, is achieved pref. by speeding up the piston return stroke w.r.t. the work stroke. USE/ADVANTAGE - Pressure reservoirs are not needed to steady the flow.

Dosierpumpe

PUMPEINRICHTUNG.

FLUESSIGKEITSDRUCKVERSTAERKER.

Zweikammer-Kraftstoffpumpe mit einem einzigen Kolben

Eine Kraftstoffpumpe (10) für ein Automobil beinhaltet ein Gehäuse (12) mit einer sich dadurch erstreckenden Öffnung (18) und einen in der Öffnung (18) gleitbar gelagerten Kolben (20). Ein Paar von Endaufsätzen (26) sind an dem Gehäuse (12) befestigt, wodurch sie den Kolben (20) innerhalb der Öffnung (18) umschließen. Eine erste und eine zweite Pumpkammer (30, 32) werden durch die Öffnung (18), ein erstes und zweites Ende des Kolbens (20) und die Endaufsätze (26) definiert. Jede der ersten und zweiten Pumpkammer (30, 32) weist einen Einlass (34), der ausgelegt ist, Kraftstoff in die Pumpenkammern (30, 32) fließen zu lassen, und einen Auslass (36) auf, der ausgelegt ist, Kraftstoff aus den Pumpenkammern (30, 32) fließen zu lassen. Ein Antrieb ist ausgelegt, den Kolben (20) innerhalb der Öffnung (18) hin- und herzubewegen, wobei er alternierend die Volumen der ersten und zweiten Pumpkammer (30, 32) vergrößert und verkleinert.

Hydrostatic pump assembly has two displacement pumps, where former displacement pump has working space with high pressure medium flow path that is brought into pressure fluid connection with another working space of latter displacement pump

The hydrostatic pump assembly (1) has two displacement pumps (2,4), where the former displacement pump has a working space (42) with a high pressure medium flow path (62), which is brought into pressure fluid connection with another working space (44) of the latter displacement pump with another high pressure medium flow path (64). The hydrostatic pump assembly is configured, such that the phase shift between the two pulsations of a resultant pulsation is minimized at or behind a junction (66).

PROCEDURE AND DEVICE FOR THE CONTROLLED DOSAGE OF ITS FLUID COMPONENT

MULTIPLE DIAPHRAGM PUMP FOR FOOD LIQUIDS AND THE LIKE

HYDRAULICALLY POWERED TRIPLEX PUMP AND CONTROL SYSTEM THEREFOR

HIGH FREQUENCY METERING OF POSITIVE DISPLACEMENT PUMPS

A lease automatic custody transfer (LACT) system includes a pump assembly and meter system. The pump assembly is configured to pump a volume of fluid out of a storage container into a conduit. The pump assembly causes a pulsating flow of the volume of fluid through the conduit. The meter system is coupled to the conduit and includes a meter device and a processing system. The meter device is configured to obtain a plurality of measurements corresponding to the volume of fluid flowing through the conduit. The processing system is communicatively coupled to the meter device and configured to determine a flow parameter value based on the plurality of measurements.

METHOD FOR MINIMIZING VIBRATION IN A MULTI-PUMP SYSTEM

A technique for reducing harmonic vibration in a multiplex multi-pump system. The technique includes establishing a lower bound of system specific vibration-related information such as via pressure variation or other vibration indicator. Establishing the lower bound may be achieved through simulation with the system or through an initial sampling period of pump operation. During this time, random perturbations through a subset of the pumps may be utilized to disrupt timing or phase of the subset. Thus, system vibration may randomly increase or decrease upon each perturbation. Regardless, with a sufficient number of sampled perturbations, the lower bound may be established. Therefore, actual controlled system operations may proceed, again employing random perturbations until operation of the system close to the known lower bound is substantially attained.

DEVICE OF PUMPING FOR PRODUCTS THICK OR SENSITIVE TO TURBULENCE

POMPE PERISTALTIQUE A DEBIT REGULIER

POMPE PERISTALTIQUE COMPRENANT AU MOINS DEUX TUBES ELASTIQUES MONTES EN PARALLELE ENTRE DEUX COLLECTEURS COMMUNS 17, 18 ET PLUSIEURS GALETS PRESSEURS SUCCESSIFS 21A, 21B, 22 ROULANT LE LONG DESDITS TUBES EN LAMINANT CES DERNIERS. CHAQUE GALET PRESSEUR 21A, 21B, 22 NE LAMINE QU'UN DES TUBES ET LES GALETS PRESSEURS SUCCESSIFS LAMINENT DES TUBES DIFFERENTS. APPLICATION: NOTAMMENT AUX POMPES DE DOSAGE.

pROPORTION - pISTON PUMP

LIQUID SUPPLY APPARATUS

PROCESS AND DEVICE FOR THE CONTROLLED METERING OF AT LEAST ONE POURABLE COMPONENT

In a process for the controlled metering of at least one pourable component, two force pumps (1, 2) driven by a smooth hydraulic current, each with an oscillating force component (9, 10), are used whereby the hydraulic current is divided in a current divider in such a way that one force pump, then both together and then the other identical force pump are driven alternately by this hydraulic current. The volume flow from the force pumps (1, 2) is also smooth and also free of leaks owing to the sealing tests performed on a force pump (1, 2) during the inoperative period. A device for implementing the process is also described.

METHOD FOR SUPPLYING A CHEMICAL OR CHEMICAL COMPOUND IN A FIBROUS WEB MACHINE AND AN APPARATUS FOR IMPLEMENTING THE METHOD

The invention relates to a method for supplying a chemical or chemical compound (L) in a fibrous web machine. In the method, the chemical or chemical compound (L) is supplied via at least two displacement pumps (1, 4) to a common supply line (11), through which the chemical or chemical compound (L) is supplied to the operating device (12) of the fibrous web machine. Each displacement pump (1, 4) has a corresponding electric actuator (2, 5). In the method, each electric actuator (2, 5) is equipped with a corresponding control drive (3, 6), the fibrous web machine is equipped with a measuring device (8; 8a, 8b) for determining the phase angles of at least the first and second actuators (2,5), a control signal based on the determined phase angle information is formed and transmitted to the first control drive (3), based on the control signal, the difference between the firs and second electric actuators (2, 5) is adjusted so as to be as desired. Between the first and second control drives ...

Bypass/leakage cooling of electric pump

An in-tank fuel pump for an automotive vehicle includes a pump housing having a pumping element, a low pressure inlet, and a high pressure outlet. A motor housing defining a motor cavity is mounted to the pump housing and a motor is mounted within the motor cavity in driving engagement with the pumping element. A bypass channel is adapted to allow a portion of the fuel flowing through the high pressure outlet to flow into the motor cavity.

ADAPTIVE CONTROL SYSTEM AND METHODS FOR WELL SERVICE PUMP SYSTEMS

A well service pump system supplies high pressure working fluid to a well. The pump system includes a closed-loop hydraulic circuit for actuating a plurality of working pump assemblies. The pump system is powered by a motor, which transfers mechanical energy to a plurality of pumps, which, in turn, provide hydraulic fluid to operate hydraulic ram cylinders, and thereby operate the working pump assemblies. Each of the polished rods of the hydraulic ram cylinders is connected axially to a plunger rod end of the working fluid end cylinder to operate the working pump assembly.

CONVEYING DEVICE

Pump system for use in high pressure applications, has auxiliary pump, powered by linear motor, connected to and in direct fluid contact with working area of main pump

A valve free auxiliary pump (1), powered by a linear motor (6), is connected to and in direct fluid contact with the working area (8) of a main pump (2). The main pump preferably utilizes a diaphragm pump.

Pulsation damping system

The invention relates to a pulsation damping system (100) for reducing pressure oscillations in inlet-side and/or outlet-side pipes (6, 13) of piston pumps (101, 102), comprising at least one piston pump (101, 102) having a pump chamber (2, 4), wherein the pump chamber (2, 4) is connected to a pump inlet channel (6) via a first fluid connection (6a) and to a pump outlet channel (13) via a second fluid connection (13a) in order to convey a conveyance medium (9). According to the invention, the pump chamber (2, 4) also has at least one damping fluid connection (20a, 29a) using which each pump chamber (2, 4) is fluidically connected to a damping device (103, 104) for damping pressure oscillations.

PUMP HAS TWO GROUPS HAS CONSTANT FLOW

Pompe péristaltique

La pompe péristaltique 1 comprend un carter 3 muni intérieurement d'une gorge 4 recevant le tube déformable 2 et de chemins de roulement 5 entourant cette gorge contre lesquels peuvent s'appuyer et rouler des rouleaux 6 propres à écraser et à fermer la partie du tube situés dans la zone du contact des rouleaux avec les chemins de roulement. Elle comporte, à l'intérieur du carter 3, au moins deux arcs 10, 11 de tube déformable indépendants, s'étendant sur des plages angulaires différentes et disposés de manière que les fluctuations de débit pour chaque pompe élémentaire correspondant à un arc angulaire 110, 11 soient déphasées, les admissions 12, 15 et refoulements 13, 14 des arcs indépendants 10, 11 étant respectivement reliées de telle sorte que le débit total de la pompe formé par la somme des débits des arcs élémentaires présente des fluctuations réduites.

Non-pulsation pump having stroke adjustment mechanism

A non-pulsation pump is provided with: a cam mechanism that converts the rotational motion of a shared motor into reciprocal motion having a prescribed phase difference; a plurality of cross heads that make reciprocal motion with a prescribed phase difference through the cam mechanism; and a plurality of reciprocating pumps that are driven with a prescribed phase difference and that include plungers connected to the cross heads, wherein the total discharge flowrate toward a shared discharge pipe is kept constant. This non-pulsation pump includes a preliminary compression step for moving the plungers of the reciprocating pumps to a discharge side by very small amounts before a discharging step but after a suction step, and has a stroke adjustment mechanism for adjusting the effective stroke length of the plunger in the preliminary compression step. Thus, generation of pulsation can be suppressed even when the set pressure changes.

Non-pulsating pump and method of controlling the same

When a pipe pressure of a common discharge pipe during an independent discharge step in which only one reciprocating pump among a plurality of reciprocating pumps discharges a fluid to the common discharge pipe differs from internal pressures in pump chambers of the respective reciprocating pumps at discharge step start point angles, a stroke adjustment mechanism adjusts, on the basis of a pressure difference ΔP therebetween, effective stroke lengths of cross heads connected to plungers of the predetermined reciprocating pumps so that the internal pressures in the pump chambers reach the pipe pressure at the discharge step start point angles.

Operating method for fluid working machine

A fluid working machine (1) has several working chambers (5) of cyclically changing volume. For pumping hydraulic fluid, the inlet and outlet valves (8,9) are electrically actuated. The timing of the actuation of said electrically actuated valves (8,9) is varied depending on the fluid flow demand and is changed at least in part continuously.

НАСОС ВЫСОКОГО ДАВЛЕНИЯ ДЛЯ НАГНЕТАНИЯ ВЫСОКОВЯЗКОГО МАТЕРИАЛА

FIELD: pumps.SUBSTANCE: invention relates to a pump for injecting a thick, high-viscosity material, such as a fluid mastic. Pump contains several cylinders, each of which has a piston, made with the possibility of reciprocating motion inside the cylinder. Movement of the piston in the first direction sucks fluid into the cylinder, and the movement in the second, opposite direction, injects fluid from the cylinder. Variable speed electric motor transmits the drive force to a cam mechanism that provides reciprocating pistons. Cam mechanism comprises cams having a shape and configured to actuate each piston in a first direction in less than half a rotation cycle, and driving each piston in a second direction during the remainder of the rotation cycle. Cams are configured to actuate the pistons are not in phase with respect to each other.EFFECT: pump operates over a wide range of flow rates, allowing one high pressure pump to provide all the required flow rates.17 cl, 8 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 682 302 C1 (51) МПК F04B 9/04 (2006.01) F04B 15/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F04B 9/04 (2018.08); F04B 15/02 (2018.08) (21)(22) Заявка: 2017132299, 29.01.2016 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): КАРЛАЙЛ ФЛУИД ТЕКНОЛОДЖИЗ ИНК. (US) Дата регистрации: 18.03.2019 1800142 A1, 16.04.1970. US 6089849 A,18.07.2000. CN 1208987 A, 24.02.1999. 18.02.2015 GB 1502686.7 (45) Опубликовано: 18.03.2019 Бюл. № 8 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 18.09.2017 (86) Заявка PCT: 2 6 8 2 3 0 2 R U (87) Публикация заявки PCT: WO 2016/132097 (25.08.2016) Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) НАСОС ВЫСОКОГО ДАВЛЕНИЯ ДЛЯ НАГНЕТАНИЯ ВЫСОКОВЯЗКОГО МАТЕРИАЛА (57) Реферат: Изобретение относится к насосу для Кулачковый механизм содержит кулачки, нагнетания густого ...

CONCRETE PUMP

... 1291846 Hydraulic reciprocating pumps G STETTER 19 Dec 1969 [31 Dec 1968] 62096/69 Heading F1A A concrete pump comprises pistons 3, 4 reciprocating in respective cylinders 1, 2 and control valves 7, 8 arranged to connect each cylinder to an inlet 12 or an outlet 20, the valve and piston timing being such that each piston commences pumping before the other piston has completed its pumping stroke. The pistons and valves are operated by hydraulic motors, solenoid operated valves being used to control the supply to the motors. The valves 7, 8 may be replaced by two one-way valves for each cylinder, one controlling the cylinder's inlet and the other the cylinder's outlet.

Pumping systems

A system 3 for pumping fluid, including a sequence of two or more positive displacement sub-systems (15A, 17 A; 15B, 17 B; 15c, 17c; 15D, 17D) each having a respective one-way inlet (2 1A, 21B, 21c, 21D). A respective one-way flow path 5 (2 5AB, 25BC, 25co) links each adjacent two of the sub-systems. A one-way outlet (25D) from a last of the sub-systems is provided. The system is capable of one mode of operation in which at least some are the sub-systems are substantially in phase with respect to each other to cause the system to draw the fluid from more than one of the one-way inlets; and one other mode of operation in which at least 10 some are the sub-systems are substantially in antiphase with respect to each other to increment a pressure of the fluid as the fluid moves along the sequence.

Pulseless, reversible precision piston-array pump

PUMP HAS TWO GROUPS HAS CONSTANT FLOW

PERISTALTIC PUMP

Method for minimizing vibration in a multi-pump system

A technique for reducing harmonic vibration in a multiplex multi-pump system. The technique includes establishing a lower bound of system specific vibration-related information such as via pressure variation or other vibration indicator. Establishing the lower bound may be achieved through simulation with the system or through an initial sampling period of pump operation. During this time, random perturbations through a subset of the pumps may be utilized to disrupt timing or phase of the subset. Thus, system vibration may randomly increase or decrease upon each perturbation. Regardless, with a sufficient number of sampled perturbations, the lower bound may be established. Therefore, actual controlled system operations may proceed, again employing random perturbations until operation of the system close to the known lower bound is substantially attained.

Ultra High Pressure Pump With An Alternating Rotation To Linear Displacement Drive Mechanism

A high pressure pump including a linear actuator having a servo motor to axially rotate a hollow rotor shaft in alternating directions, the servo motor having a stator positioned co-axially around the hollow rotor shaft with an interior of the rotor shaft being co-axially coupled to a drive member to convert axial rotation into reciprocal displacement, the drive member being constrained against linear movement and supporting a shaft. At least one piston is coupled to the shaft and the piston is arranged within a cylinder to define a pumping chamber, whereby alternating rotation of the rotor shaft causes reciprocal linear displacement of the piston to pressurize fluid in the pumping chamber. A drive mechanism includes a controller coupled to a servomotor and an encoder to measure movement of the hollow rotor or output shaft and send a feedback signal proportional to the movement to the controller. 1. A drive mechanism capable of driving a pump having two pumping chambers to deliver 2 liters per minute at more than 345 MPa (50 ,000 psi) for waterjet cutting , the drive mechanism comprising:a servo motor;an output shaft having ends respectively couplable to the pumping chambers; anda controller coupled to the servo motor;the servo motor comprising a hollow rotor and a stator coaxially mounted around the hollow rotor;the hollow rotor including drive means co-axially coupled to the output shaft whereby the drive means converts rotational movement of the rotor to linear displacement of the shaft to pressurize fluid in the pumping chambers;the drive mechanism further comprising an encoder configured to measure movement of the hollow rotor or the output shaft and to send a feedback signal to the controller;the controller being configured to control the servo motor by monitoring the feedback signal and electrical-current information coming back from the stator.2. The drive mechanism of claim 1 , wherein the encoder is configured to count a frequency of rotation of the hollow ...

REDUCING FLUID PRESSURE SPIKES IN A PUMPING SYSTEM

A pumping system including a plurality of pumps each having a pump fluid outlet, a drive shaft, a prime mover, and fluid displacing members operatively coupled with the drive shaft. A common fluid conduit may be fluidly coupled with each pump fluid outlet. A control system of the pumping system includes position sensors operable to generate information relating to phase and/or speed of each pump, pressure sensors operable to generate information relating to fluid pressure spikes, and a controller in communication with the position and pressure sensors. The controller is operable to cause the prime movers to adjust the phasing of the pumps with respect to each other, based on the information relating to fluid pressure spikes, and synchronize the speed of the pumps. 1. An apparatus , comprising: [ a drive shaft;', 'a prime mover operatively coupled with the drive shaft and operable to rotate the drive shaft;', 'a plurality of reciprocating members operable to pump a fluid;', 'a plurality of connecting rods operatively connecting the drive shaft with the plurality of reciprocating members; and', 'a pump fluid outlet; and, 'a plurality of pumps each comprising, a plurality of position sensors each associated with a corresponding one of the plurality of pumps, wherein each of the plurality of position sensors is operable to generate information relating to phase and/or speed of the corresponding one of the plurality of pumps;', 'a plurality of pressure sensors each associated with a corresponding one of the plurality of pumps, wherein each of the plurality of pressure sensors is operable to generate information relating to fluid pressure spikes at a corresponding pump fluid outlet; and', 'a controller in communication with the plurality of position sensors and the plurality of pressure sensors, wherein the controller is operable to cause each of the plurality of pumps to operate such that each fluid pressure spike at each pump fluid outlet is out of phase with respect to ...

DEVICE FOR CONTROLLING A PISTON PUMP UNIT FOR LIQUID CHROMATOGRAPHY

A control device of a piston pump unit comprising at least two piston-cylinder units that operate in a phase-shifted manner for the purpose of liquid chromatography and to a piston pump unit is described. The control device corrects fluctuations of the system pressure while switching from one piston cylinder unit to the respective other piston cylinder unit. The fluctuations can occur as a result of the cooling of the liquid medium that is heated in an adiabatic manner during a pre-compression phase in the working piston. The control unit controls the piston speed of at least one piston-cylinder unit during the transition phase depending on at least one characteristic, which is ascertained from chronologically previously detected pressure values, such that variations of the system pressure as a result of the cooling of the adiabatically heated medium are at least partially compensated for. 1. A method to control a piston pump for liquid chromatography , the piston pump including at least two phase-offset cyclically working piston-cylinder units , which produce a predefined flow of a liquid medium to be delivered at an outlet port , wherein a constant system pressure results at the outlet port , the method comprising:in a pre-compression phase of one cycle of at least one of the piston-cylinder units, compressing a piston in the piston-cylinder unit;measuring a first pressure at a first time and a second pressure at a second time during the pre-compression phase in which an adiabatic heating effect is negligible in the piston-cylinder unit;extrapolating the first pressure at the first time and the second pressure at the second time to determine a calculated time in which the pressure of the piston-cylinder unit will be at the constant system pressure;determining a detected time in which the pressure of the piston-cylinder unit is measured with a pressure sensor to be at the constant system pressure;calculating a time difference based on the calculated time and the ...

Synchronization of Supply Flow Paths

A solvent supply system for supplying a composite solvent is described. The solvent supply system comprises a first supply flow path with a first pump unit, the first supply flow path being adapted for supplying a flow of a first solvent to a mixing unit, the first pump unit operating periodically, and a second supply flow path with a second pump unit, the second supply flow path being adapted for supplying a flow of a second solvent to the mixing unit, the second pump unit operating periodically. The mixing unit is adapted for mixing the first and the second solvent and for supplying a composite solvent. The solvent supply system further comprises a control unit adapted for controlling operation of the first and the second pump unit, the control unit being adapted to prevent at least one of a predefined phase relation and a predefined frequency relation between the first pump unit and the second pump unit. 1. A chromatographic gradient pump system for supplying a composite solvent having a varying ratio of a first solvent and a second solvent as a function of time , the gradient pump system comprising:a first supply flow path comprising a first pump unit having a first reciprocating piston, the first supply flow path configured to supply a flow of the first solvent;a second supply flow path comprising a second pump unit having a second reciprocating piston, the second supply flow path configured to supply a flow of the second solvent;a mixing unit being configured to mix the flow of the first solvent and the flow of the second solvent to supply the composite solvent; anda control unit configured to coordinate operation of the first pump unit and of the second pump unit relative to each other by changing a piston stroke of at least one of the first and second reciprocating pistons to prevent an unfavorable phase relation of the first pump unit and the second pump unit.2. The pump system of claim 1 , wherein the unfavorable phase relation comprises at least one of: ...

NON-PULSATING PUMP AND METHOD OF CONTROLLING THE SAME

When a pipe pressure of a common discharge pipe during an independent discharge step in which only one reciprocating pump among a plurality of reciprocating pumps discharges a fluid to the common discharge pipe differs from internal pressures in pump chambers of the respective reciprocating pumps at discharge step start point angles, a stroke adjustment mechanism adjusts, on the basis of a pressure difference ΔP therebetween, effective stroke lengths of cross heads connected to plungers of the predetermined reciprocating pumps so that the internal pressures in the pump chambers reach the pipe pressure at the discharge step start point angles. 1. A non-pulsating pump comprising:a drive mechanism having: a cam mechanism which converts a rotational motion of a drive motor into a reciprocating motion; and a plurality of crossheads which are reciprocated by the cam mechanism with a predetermined phase difference;a plurality of reciprocating pumps, each having: a plunger which is connected to the crosshead and which reciprocates with the reciprocating motion of the crosshead; a pump chamber having an inner pressure which changes with the reciprocating motion of the plunger; an intake valve which connects a common intake line and the pump chamber, and which has a side of the pump chamber as a back pressure side; and a discharge valve which connects the pump chamber and a common discharge line, and which has a side of the common discharge line as a back pressure side; anda stroke adjustment mechanism that adjusts an effective stroke length for the crosshead to reciprocate the plunger, whereinwhen a line pressure of the common discharge line at a single discharge step in which only one reciprocating pump, among the plurality of reciprocating pumps, discharges fluid to the common discharge line differs from the inner pressure of the pump chamber of a predetermined reciprocating pump at a discharge step starting point angle determined corresponding to a cam angle of the cam ...

METHOD OF DAMPENING PRESSURE PULSATIONS IN A WORKING FLUID WITHIN A CONDUIT

A method is provided for actively compensating for pressure changes of a working fluid within a conduit. A first cavity is provided in fluid communication with the conduit. A second cavity is in fluid communication with a control fluid. A plunger is in communication with both the first cavity and the second cavity and is movable in response to pressure changes of the working fluid in the conduit. The plunger is re-centered. Re-centering the plunger includes the following steps. Position data representative of movement of the plunger is collected. The position data is analyzed with a control unit to determine an average position of the plunger which is offset relative to a center position. The average position of the plunger is compared, with a control unit, to the center position. A signal is relayed from the control unit to a control valve to urge the plunger toward the center position. 1. A method of dampening pressure pulsations in a working fluid within a conduit , the method comprising:providing a first cavity in fluid communication with the conduit;providing a second cavity, in fluid communication with a control fluid and a control valve and separated from the first cavity by a plunger;identifying a first component of a pressure fluctuation within the conduit by comparing an average working fluid pressure measured with a pressure sensor in the conduit to a pressure measured with a pressure sensor in the second cavity,identifying a second component of the pressure fluctuation with the pressure sensor in the conduit, the second component of the pressure fluctuation having a higher frequency than the first component of the pressure fluctuation;relaying a first signal indicative of the first component of the pressure fluctuation to the control unit;relaying a second signal indicative of the second component of the pressure fluctuation to the control unit; andsending a single cumulative output from the control unit to actuate the control valve to simultaneously ...

FLUID SUPPLY APPARATUS

A fluid supply apparatus which supplies a fluid to a medical apparatus includes: a pump mechanism including a first pump capable of carrying out a intake operation of a fluid and a feeding operation of the fluid, and a second pump capable of alternately carrying out a intake operation of the fluid and a feeding operation of the fluid; a flow passage which includes an elastic member and which communicates with the pumps and supplies the fluid to the medical apparatus; a pressure fluctuation detecting unit capable of detecting fluctuation in internal pressure in the flow passage; and a flow passage deforming unit which deforms the flow passage according to the fluctuation in the internal pressure. 1. A fluid supply apparatus comprising:a flow passage communicating with a medical apparatus;a first pump capable of switching between intake of a fluid and discharge of the fluid to the flow passage;a second pump capable of switching between intake of the fluid and discharge of the fluid to the flow passage;a pressure fluctuation detecting unit capable of detecting fluctuation in internal pressure in the flow passage; anda flow passage deforming unit which deforms a part of the flow passage according to the internal pressure detected by the pressure fluctuation detecting unit.2. The fluid supply apparatus according to claim 1 , wherein the pressure fluctuation detecting unit detects fluctuation in the internal pressure based on a displacement of an outer wall surface of the flow passage.3. The fluid supply apparatus according to claim 1 , wherein when the first pump ejects the fluid to the flow passage claim 1 , the second pump sucks in the fluid claim 1 ,when the first pump sucks in the fluid, the second pump ejects the fluid to the flow passage, andthe pressure fluctuation detecting unit detects fluctuation in the internal pressure in the flow passage when the first pump shifts from intake to discharge.4. The fluid supply apparatus according to claim 1 , wherein the ...

Fluid supply apparatus

A fluid supply apparatus which supplies fluid to a medical apparatus includes: a pump mechanism including a first pump capable of a suction operation of the fluid after a feeding operation of the fluid, and a second pump capable of a suction operation of the fluid during the feeding operation and a feeding operation of the fluid during the suction operation; a flow path which includes an elastic member and which communicates with the first pump and the second pump and supplies the fluid to the medical apparatus; and a flow path deforming unit which deforms a part of the flow path. The flow path deforming unit starts first deformation of the flow path before the first pump switches from the feeding operation to the suction operation, and completes the first deformation and starts second deformation of the flow path during the feeding operation by the second pump.

Ultra High Pressure Pump With An Alternating Rotation To Linear Displacement Drive Mechanism

A high pressure pump including a linear actuator comprising a servo motor to axially rotate a hollow rotor shaft in alternating directions, the servo motor having a stator positioned co-axially around the hollow rotor shaft with an interior of the rotor shaft being co-axially coupled to a drive member to convert axial rotation into reciprocal displacement, the drive member being constrained against linear movement and supporting a shaft. At least one piston is coupled to the shaft and the piston is arranged within a cylinder to define a pumping chamber, whereby alternating rotation of the rotor shaft causes reciprocal linear displacement of the piston to pressurize fluid in the pumping chamber. A drive mechanism includes a controller coupled to a servomotor and an encoder to measure movement of the hollow rotor or output shaft and send a feedback signal proportional to the movement to the controller. 118-. (canceled)19. An ultra high pressure pump , comprising:a motor adapted to axially rotate a hollow rotor shaft in alternating directions, the motor having a stator positioned co-axially around the hollow rotor shaft with the interior of the rotor shaft being co-axially coupled to drive means to convert axial rotation into reciprocal displacement, the motor including an encoder to monitor movement of at least one of the rotor shaft and drive means, the drive means being coupled to at least one piston having a head arranged within a cylinder to define a pumping chamber between the head of the piston and the cylinder, whereby alternating rotation of the rotor shaft causes reciprocal linear displacement of the piston to pressurize fluid in the pumping chamber to pressures greater than 50,000 psi.20. The ultra high pressure pump of claim 19 , wherein the encoder is coupled to the motor via a closed feedback loop.21. The ultra high pressure pump of claim 19 , wherein the encoder transmits at least one of a velocity feedback signal and a position feedback signal.22. The ...

Liquid supply apparatus

In a liquid supply apparatus, plungers which respectively expand and contract pump chambers are reciprocated linearly in an axial direction with their phases shifted to each other, thereby continuously discharging liquid. In a pump block, drive rods are mounted so as to be reciprocatable in an axial direction. At a center in an axial direction of shafts attached to the drive rods, drive rollers are mounted, and rollers are mounted at both ends of the shafts. Guide grooves which support the guide rollers are formed in guide blocks.

Device for controlling a piston pump unit for liquid chromatography

A control device of a piston pump unit comprising at least two piston-cylinder units that operate in a phase-shifted manner for the purpose of liquid chromatography and to a piston pump unit is described. The control device corrects fluctuations of the system pressure while switching from one piston cylinder unit to the respective other piston cylinder unit. The fluctuations can occur as a result of the cooling of the liquid medium that is heated in an adiabatic manner during a pre-compression phase in the working piston. The control unit controls the piston speed of at least one piston-cylinder unit during the transition phase depending on at least one characteristic, which is ascertained from chronologically previously detected pressure values, such that variations of the system pressure as a result of the cooling of the adiabatically heated medium are at least partially compensated for.

HYDRAULIC SYSTEM

A hydraulic system has two hydraulic circuits, each with a pressure generating unit acting on an actuator unit. The generating units are slot-controlled radial piston pumps and form a pump assembly with a single common pump support and single common rotor. The rotor is rotatable on a free protruding section of a common support hub and has piston-receiving bores on axially offset planes. The hub has two first and two second fluid bores. The first bores communicate with first pump connections and first control openings on the hub on a first plane, and the second fluid bores communicate with second pump connections and second control openings on the hub on a second plane. A first and a second adjustment frame, each having an eccentric ring and acting on the pump pistons, are disposed on respective planes perpendicular to the main axis and independently guided in a linearly movable manner. 118-. (canceled)19. A hydraulic system , comprisinga first hydraulic circuit having a first actuator unit and a first pressure generating unit acting upon the first actuator unit, the first pressure generating unit having a reversible pump direction;a second hydraulic circuit having a second actuator unit and a second pressure generating unit acting upon the second actuator unit, the second pressure generating unit having a reversible pump direction;the first and the second pressure generation unit each being a slot-controlled radial piston pump; a single, common pump support with a common pump support hub, the common pump support hub having a fixed side and a free protruding section, the pump support hub further having two first fluid bores and two second fluid bores, the two first fluid bores communicating with two first pump connections and two first control openings arranged on the pump support hub on a first pump piston plane and the two second fluid bores communicating with two second pump connections and two second control openings arranged on the pump support hub on a second ...

Ultra High Pressure Pump with an Alternating Rotation to Linear Displacement Drive Mechanism

A high pressure pump including a linear actuator having a servo motor to axially rotate a hollow rotor shaft in alternating directions, the servo motor having a stator positioned co-axially around the hollow rotor shaft with an interior of the rotor shaft being co-axially coupled to a drive member to convert axial rotation into reciprocal displacement, the drive member being constrained against linear movement and supporting a shaft. At least one piston is coupled to the shaft and the piston is arranged within a cylinder to define a pumping chamber, whereby alternating rotation of the rotor shaft causes reciprocal linear displacement of the piston to pressurize fluid in the pumping chamber. A drive mechanism includes a controller coupled to a servomotor and an encoder to measure movement of the hollow rotor or output shaft and send a feedback signal proportional to the movement to the controller. 1. A pump , comprising:two pistons, two cylinders, and two high pressure seals defining two pumping chambers; anda drive mechanism configured to drive the pump to deliver fluid at 2 liters per minute and more than 50,000 psi for waterjet cutting with the fluid; a screw having ends each coupled to a respective one of the pistons;', 'a motor comprising a stator coaxially mounted around a hollow rotor comprising a nut portion co-operable with the screw to linearly drive the screw to pressurize the fluid in the pumping chambers;', 'an encoder configured to measure movement of the hollow rotor or the screw and send a feedback signal; and', 'a controller configured to control the motor by monitoring the feedback signal and electrical-current information coming back from the stator., 'the drive mechanism comprising'}2. The pump of claim 1 , wherein the encoder is configured to count a frequency of rotation of the hollow rotor.3. The pump of claim 1 , wherein the encoder is configured to send a velocity feedback signal and a position feedback signal.4. The pump of claim 1 , wherein ...

HIGH PRESSURE PUMP

A positive displacement pump for pumping a fluid mastic comprises a plurality of cylinders each having a piston arranged for reciprocal motion within the cylinder. Movement of the piston in a first direction draws the fluid into the cylinder and movement in a second, opposite direction pumps the fluid out of the cylinder. A variable speed electric motor is drivingly coupled to a cam arrangement providing a reciprocating drive to the pistons. The cam arrangement comprises cams shaped and arranged to drive each piston in the first direction over less than half of a rotational cycle and to drive each piston in the second direction over the remainder of the rotational cycle. The cams are arranged to drive the pistons out of phase with one another. 1. A positive displacement pump suitable for pumping a fluid mastic , the pump comprising:at least three cylinders wherein each cylinder each has a piston arranged for reciprocal motion within the cylinder, whereby movement of the piston in a first direction draws the fluid into the cylinder and movement in a second, opposite direction pumps the fluid out of the cylinder; anda variable speed electric motor drivingly coupled to a cam arrangement providing a reciprocating drive to the pistons,wherein the cam arrangement comprises cams shaped and arranged to drive each piston in the first direction over less than half of a rotational cycle and to drive each piston in the second direction over the remainder of the rotational cycle, wherein the cam arrangement has one cam for each piston, wherein each cam has a main surface and a return surface, wherein the main surface is configured to offset from the return surface along a direction of an axis of a cam shaft ,wherein the cams are arranged to drive the pistons out of phase with one another; andwherein the cams are arranged to drive the pistons such that, at any position of the rotational cycle more than half of the pistons are being driven in the second direction.2. The positive ...

Positive displacement pump and operating method thereof

A positive displacement pump includes a drive unit and a pump unit. The pump unit comprises a plurality of working chambers, a plurality of displacement elements, and at least three cylinders. The pump unit is configured to be double-acting.

Cavitation Avoidance System

A monitoring system for a plurality of pressure pumps may include, for each pump, a strain gauge, a position sensor and a pressure transducer. A strain gauge may be positionable on each pump to generate a strain measurement corresponding to strain in each pump. A position sensor may be positionable on each pump to generate a position measurement corresponding to a position of a rotating member corresponding of each pump. A pressure transducer is positionable on each pump to generate a boost pressure measurement that is usable with the strain measurement and the position measurement to determine a cavitation threshold for each pump. 1. A monitoring system , comprising:a plurality of strain gauges positionable on a plurality of pressure pumps to generate strain measurements for the plurality of pressure pumps;a plurality of position sensors positionable on the plurality of pressure pumps to generate position measurements for rotating members of the plurality of pressure pumps; anda plurality of pressure transducers positionable on the plurality of pressure pumps to generate boost pressure measurements in a fluid ends of the plurality of pressure pumps, the boost measurements being usable with the strain measurement and the position measurement to determine a cavitation threshold of each pump of the plurality of pressure pumps.2. The monitoring system of claim 1 , further comprising a computing device communicatively couplable to the plurality of strain gauges claim 1 , the plurality of position sensors claim 1 , and the plurality of pressure transducers to transmit a control signal to a pump of the plurality of pressure pumps operating beyond the cavitation threshold claim 1 , the control signal corresponding to a first instruction to adjust a first pump rate of the pump in a first direction.3. The monitoring system of claim 2 , wherein the computing device includes a processing device for which instructions are executable by the processor to cause the processing ...

LIQUID DELIVERY DEVICE

A liquid feeding device includes a discharge channel, a pump part, a feeding pressure sensor, a non-discharge pressure sensor, a pre-compression part, and a pre-compression speed determination part. The pump part has plunger pumps connected in series or parallel. At least one of the plunger pumps is a closed pump in which communication with the discharge channel is disconnected during a non-discharge time. The pre-compression part causes the closed pump that is after the suction process for sucking the liquid into a pump chamber is completed and during the non-discharge time to execute a pre-compression process to perform a discharge operation until a non-discharge pressure is substantially the same as a feeding pressure based on output of the feeding pressure sensor and output of the non-discharge pressure sensor. The pre-compression speed determination part determines a pre-compression speed of the closed pump in the pre-compression process. 1. A liquid feeding device comprising:a discharge channel;a pump part including a plurality of plunger pumps connected in series or in parallel to each other and discharging liquid to the discharge channel, at least one of the plurality of plunger pumps being a closed pump not connected to the discharge channel during a non-discharge time, the non-discharge time being a time in which the closed pump does not execute a discharge process for discharging liquid to the discharge channel;a feeding pressure sensor detecting pressure in the discharge channel as a feeding pressure;a non-discharge pressure sensor detecting pressure in the pump chamber of the closed pump during the non-discharge time as non-discharge pressure;a pre-compression part configured to cause the closed pump to execute a pre-compression process after completing a suction process for sucking liquid into the pump chamber and during the non-discharge time based on output of the feeding pressure sensor and output of the non-discharge pressure sensor, the pre- ...

Non-pulsation pump

A non-pulsation pump is provided with: a cam mechanism that converts the rotational motion of a shared motor into reciprocal motion having a prescribed phase difference; a plurality of cross heads that make reciprocal motion with a prescribed phase difference through the cam mechanism; and a plurality of reciprocating pumps that are driven with a prescribed phase difference and that include plungers connected to the cross heads, wherein the total discharge flowrate toward a shared discharge pipe is kept constant. This non-pulsation pump includes a preliminary compression step for moving the plungers of the reciprocating pumps to a discharge side by very small amounts before a discharging step but after a suction step, and has a stroke adjustment mechanism for adjusting the effective stroke length of the plunger in the preliminary compression step. Thus, generation of pulsation can be suppressed even when the set pressure changes.

PULSATION DAMPING SYSTEM

A pulsation damping system for reducing pressure oscillations in an inlet line and/or in an outlet line of a piston pump. The piston pump includes a pump chamber which is connected to the inlet line of the piston pump via a first fluid connection and to the outlet line of the piston pump via a second fluid connection to convey a conveyance fluid. The pulsating damping system includes a damping device. The pump chamber includes a damping fluid connection via which the pump chamber is fluidically connected to the damping device to damp the pressure oscillations. 120-. (canceled)21. A pulsation damping system for reducing pressure oscillations in at least one of an inlet line and in an outlet line of at least one piston pump ,the at least one piston pump comprising a pump chamber which is connected to the inlet line of the at least one piston pump via a first fluid connection and to the outlet line of the at least one piston pump via a second fluid connection so as to convey a conveyance fluid,the pulsating damping system comprising:a damping device,wherein,the pump chamber comprises at least one damping fluid connection via which the pump chamber is fluidically connected to the damping device so as to damp the pressure oscillations.22. The pulsation damping system as recited in claim 21 , further comprising:a hydraulic connection line arranged between the pump chamber and the damping device; anda throttle valve arranged in the hydraulic connection line.23. The pulsation damping system as recited in claim 21 , further comprising:at least one pressure chamber which is fluidically connected to the pump chamber; anda volume change device which is configured to change a volume of the at least one pressure chamber.24. The pulsation damping system as recited in claim 23 , wherein the volume change device comprises a displacement body which is configured to change the volume of the at least one pressure chamber claim 23 , the displacement body being provided as a displaceable ...

Improved pulse-free metering pump and methods relating thereto

A method of dispensing a continuous fluid flow is described, the method includes: (i) filling a first cylinder chamber, having a first predefined volume, with fluid received through a first manifold from a first fluid inlet; (ii) dispensing the first predefined amount of the fluid present inside the first cylinder chamber through the first manifold to a fluid outlet; (iii) filling a second cylinder chamber, having a second predefined volume, with fluid received through a second manifold from a second fluid inlet, and wherein filling is carried out contemporaneously with dispensing; (iv) exerting, during dispensing, a deflection-causing force on a first housing that is disposed adjacent to the first cylinder chamber; and (v) preventing, using the deflection-prevention feature, transfer of the deflection-causing force from the first housing to a second housing, which is disposed adjacent to the second cylinder chamber and is disposed adjacent to the first housing.

MULTIPLEX PUMP SYSTEMS AND ASSOCIATED METHODS OF USE WITH WATERJET SYSTEMS AND OTHER HIGH PRESSURE FLUID SYSTEMS

High pressure pump systems for use with waterjet systems and other systems are described herein. A pump system configured in accordance with a particular embodiment includes a first multi-cylinder pump having a first crankshaft and a second multi-cylinder pump having a second crankshaft. The first and second crankshafts are operably coupled together (via, e.g., a common drive system) so that the reciprocation cycles of the corresponding pistons or plungers are spaced apart from each other in equal intervals of crankshaft rotation. 112-. (canceled)13. A fluid pressurizing system comprising: a first crankcase;', 'a first crankshaft operably disposed within the crankcase;', 'at least first and second pressurizing members operably coupled to the first crankshaft; and', 'at least first and second cylinders mounted to the first crankcase, wherein the first pressurizing member is operably disposed in the first cylinder and the second pressurizing member is operably disposed in the second cylinder;, 'a first pump, the first pump having a second crankcase;', 'a second crankshaft operably disposed within the crankcase;', 'at least third and fourth pressurizing members operably coupled to the second crankshaft; and', 'at least third and fourth cylinders mounted to the second crankcase, wherein the third pressurizing member is operably disposed in the third cylinder and the fourth pressurizing member is operably disposed in the fourth cylinder;, 'a second pump, the second pump havinga drive system, wherein the first and second crankshafts are operably coupled to the drive system in a fixed phase relationship, and wherein the first, second, third and fourth pressurizing members reciprocate in the corresponding first, second, third and fourth cylinders in cycles spaced apart by equal phase angles during simultaneous rotation of the first and second crankshafts;a first manifold in fluid communication with the first and second cylinders;a second manifold in fluid communication with ...

Method of dampening pressure pulsations in a working fluid within a conduit

A method is provided for actively compensating for pressure changes of a working fluid within a conduit. A first cavity is provided in fluid communication with the conduit. A second cavity is in fluid communication with a control fluid. A plunger is in communication with both the first cavity and the second cavity and is movable in response to pressure changes of the working fluid in the conduit. The plunger is re-centered. Re-centering the plunger includes the following steps. Position data representative of movement of the plunger is collected. The position data is analyzed with a control unit to determine an average position of the plunger which is offset relative to a center position. The average position of the plunger is compared, with a control unit, to the center position. A signal is relayed from the control unit to a control valve to urge the plunger toward the center position.

PUMP SYSTEMS AND ASSOCIATED METHODS FOR USE WITH WATERJET SYSTEMS AND OTHER HIGH PRESSURE FLUID SYSTEMS

High pressure pump systems with reduced pressure ripple for use with waterjet systems and other systems are described herein. A pump system configured in accordance with a particular embodiment includes four reciprocating members operably coupled to a crankshaft at 90 degree phase angles. The reciprocating members can include plungers operably disposed in corresponding cylinders and configured to compress fluid (e.g., water) in the cylinders to pressures suitable for waterjet processing, such as pressures exceeding 30,000 psi. 115-. (canceled)16. A waterjet system comprising: a crankcase;', 'a crankshaft operably disposed within the crankcase;', 'four reciprocating members operably coupled to the crankshaft; and', 'four cylinders mounted to the crankcase, wherein each of the individual reciprocating members is operably disposed in a corresponding one of the individual cylinders; and, 'a pressurizing device configured to pressurize a process fluid, wherein the pressurizing device includesa jet outlet downstream from the pressurizing device, the jet outlet being configured to receive the process fluid from the pressurizing device at a pressure greater than 30,000 psi and direct a jet including the process fluid toward a workpiece.17. The waterjet system of wherein there are not more than four reciprocating members operably coupled to the crankshaft and not more than four corresponding cylinders mounted to the crankcase.18. The waterjet system of wherein the four reciprocating members operate 90 degrees out of phase with each other during rotation of the crankshaft.19. The waterjet system of wherein each of the four reciprocating members is a plunger.20. The waterjet system of wherein the four reciprocating members are configured to individually compress the process fluid in the corresponding cylinders to pressures greater than 60 claim 16 ,000 psi and less than 150 claim 16 ,000 psi.21. The waterjet system of wherein the four reciprocating members are configured to ...

Pumping Systems

A system for pumping fluid, including a sequence of two or more positive-displacement sub-systems each having a respective one-way inlet. A respective one-way flow path links each adjacent two of the sub-systems. A one-way outlet from a last of the sub-systems is provided. The system is capable of a mode of operation in which at least some of the sub-systems are substantially in phase with respect to each other to cause the system to draw fluid from more than one of the one-way inlets; and another other mode of operation in which at least some of the sub-systems are substantially in antiphase with respect to each other to increment a pressure of the fluid as the fluid moves along the sequence. 1. A system , for pumping fluid , comprising:a sequence of two or more positive-displacement sub-systems each having a respective one-way inlet;a respective one-way flow path linking each adjacent two of the sub-systems; anda one-way outlet from a last of the sub-systems;the system being configured to operate in at least the following operating modes:a first mode of operation in which at least some of the sub-systems are substantially in phase with respect to each other to cause the system to draw the fluid from more than one of the one-way inlets; andone other a second mode of operation in which at least some of the sub-systems are substantially in antiphase with respect to each other to increment a pressure of the fluid as the fluid moves along the sequence.2. The system of wherein in the first mode of operation all of the sub-systems are substantially in phase with respect to each other.3. The system of wherein in the second mode of operation the sub-systems of each adjacent two of the sub-systems are substantially in antiphase with respect to each other to increment the pressure through each of the sub-systems.4. (canceled)5. (canceled)6. (canceled)7. The system of wherein at least one of the sub-systems has a variable stroke length.8. The system of wherein a ratio claim 7 ...

PLANT FOR CONTROLLING DELIVERY OF PRESSURIZED FLUID IN A CONDUIT, AND A METHOD OF CONTROLLING A PRIME MOVER

A plant for delivering a fluid in a conduit () comprises a prime mover (), for example a gas turbine, which is configured to drive one or more fluid delivery systems (---) for delivering a fluid in the conduit (). A first sensor () is configured for sensing pressure variations in the pipe () and is connected to a first controller (). The first controller () is configured to provide control signals to control valves (--) for at least one fluid delivery system and to a control system () for the prime mover (). One or more hydraulic pumps (-) are configured to operate the fluid delivery systems and are driven by the prime mover, whereby interaction between the hydraulic pumps and the prime mover is controlled based on sensed pressure in the pipe (). 1. A method of controlling a plant for delivering a pressurized fluid in a conduit , the plant comprising: a prime mover configured to supply torque to one or more hydraulic pumps , each hydraulic pump being configured to supply hydraulic pressure to a respective positive displacement fluid delivery system via a respective control valve , each positive displacement fluid delivery system being configured to deliver the pressurized fluid in the conduit; a first sensor configured for sensing pressure variations in the conduit; and a first controller in data communication with the first sensor , the first controller being configured to provide control signals to the control valve for at least one of the fluid delivery systems and to a control system for the prime mover; the method comprising:sensing pressure variations in the pressurized fluid in the conduit; andbased on the sensed pressure variations:(a) controlling at least one of the positive displacement fluid delivery systems; and(b) controlling power output of the prime mover.2. The method of claim 1 , further comprising determining an estimated power consumption.3. The method of claim 2 , wherein controlling power output of the prime mover comprises controlling a fuel ...

Ultra High Pressure Pump With An Alternating Rotation To Linear Displacement Drive Mechanism

A high pressure pump including a linear actuator having a servo motor to axially rotate a hollow rotor shaft in alternating directions, the servo motor having a stator positioned co-axially around the hollow rotor shaft with an interior of the rotor shaft being co-axially coupled to a drive member to convert axial rotation into reciprocal displacement, the drive member being constrained against linear movement and supporting a shaft. At least one piston is coupled to the shaft and the piston is arranged within a cylinder to define a pumping chamber, whereby alternating rotation of the rotor shaft causes reciprocal linear displacement of the piston to pressurize fluid in the pumping chamber. A drive mechanism includes a controller coupled to a servomotor and an encoder to measure movement of the hollow rotor or output shaft and send a feedback signal proportional to the movement to the controller. 118-. (canceled)19. An ultra high pressure pump , comprising:a servo motor;a hollow rotor shaft;drive means;at least one piston;at least one cylinder;at least one pumping chamber; anda screw;the servo motor being adapted to axially rotate the hollow rotor shaft in alternating directions;the servo motor having a stator positioned co-axially around the hollow rotor shaft;the hollow rotor shaft being co-axially coupled to the drive means;the drive means being to convert axial rotation into reciprocal displacement;the servo motor including an encoder to monitor movement of at least one of the hollow rotor shaft and the drive means;the encoder being coupled to the servo motor via a closed feedback loop;the at least one piston having a head arranged within the at least one cylinder to define the at least one pumping chamber between the head and the at least one cylinder;the drive means being coupled to the at least one piston and such that alternating rotation of the hollow rotor shaft causes reciprocal linear displacement of the at least one piston to pressurise fluid in the at ...

THICK-MATTER PUMP FOR PRODUCING A CONTINUOUS THICK-MATTER FLOW AND METHOD FOR OPERATING A THICK-MATTER PUMP FOR PRODUCING A CONTINUOUS THICK-MATTER FLOW

A thick-matter pump for producing a continuous thick-matter flow is described. The pump includes at least two pump units, which alternate in pumping and suction operation, a suction line with a charge-pressure device, which acts separately from the pump units for actively bringing about a thick-matter compression, a delivery line, and a switchover device for switching between the pump units. In a first operating state for conveying the thick matter, by way of the switchover device, at least one first pump unit is connected during pumping operation to the delivery line and at least one second pump unit is connected during suction operation to the suction line. In a second operating state, by way of the switchover device, at least one first pump unit is connected during suction operation to the delivery line and at least one second pump unit is connected during pumping operation to the suction line, and the charge-pressure device is switched to an inactive state.

PORTABLE HYDRAULIC POWER UNIT

A portable hydraulic power unit includes a frame, a fluid tank supported by the frame, and a manifold supported by the frame. The fluid tank is configured to store a supply of hydraulic fluid for powering a hydraulically-driven tool. A reciprocating pump is mounted on the exterior of the fluid tank and on the exterior of the manifold. The reciprocating pump is secured to the fluid tank and the manifold with fasteners extending through a cylinder body of the reciprocating pump. 1. A hydraulic power unit comprising:a frame;a fluid tank supported by the frame, the fluid tank configured to store a supply of hydraulic fluid;a manifold supported by the frame; anda first reciprocating pump fixed to a tank exterior side of the fluid tank and a manifold exterior side of the manifold, the first reciprocating pump configured to draw the hydraulic fluid from the fluid tank and pump a first flow of hydraulic fluid to the manifold.2. The hydraulic power unit of claim 1 , wherein the first reciprocating pump comprises:a first cylinder body attached to the tank exterior side and the manifold exterior side; anda first piston extending at least partially out of the first cylinder body, wherein a portion of the first piston extending out of the first cylinder body is configured to connect to and be driven by a drive mechanism.3. The hydraulic power unit of claim 2 , wherein the first cylinder body includes:a first upper mounting portion having a first upper mounting face, the first upper mounting face abutting the manifold; anda first lower mounting portion having a first lower mounting face, the first lower mounting face abutting the fluid tank.4. The hydraulic power unit of claim 3 , wherein the first cylinder body further comprises:a first fluid inlet extending into the first lower mounting portion through the first lower face; anda first fluid outlet extending into the first upper mounting portion through the first upper face.5. The hydraulic power unit of claim 4 , wherein:the ...

Solenoid valve for a portable hydraulic power unit

A portable hydraulic power unit includes a fluid tank supported on a frame, a first pump configured to draw hydraulic fluid from the tank and a second pump configured to draw hydraulic fluid from the tank. The portable hydraulic power unit further includes a two-way valve disposed on a high-flow line extending from an output of the second pump, the two-way valve movable between an open state and a closed state. The two-way valve is electrically-actuated and configured to shift to the open state based on a hydraulic fluid pressure in a combined flow line downstream of the first pump and the second pump exceeding a threshold pressure level. The two-way valve directs the output of the second pump back to the fluid tank when the two-way valve is in the open state.

Trigger guard and pendant for a portable hydraulic power unit

A trigger guard for a pendant for controlling a hydraulic power unit includes a first prong extending from a front side of a handle of the pendant; a second prong extending from the front side of the handle; a groove disposed between the first prong and the second prong, the groove defined by the first prong, the second prong, and the handle; a first gap disposed between the first prong and a head of the pendant; and a second gap disposed between the second prong and the head. The trigger is disposed between the first prong and the second prong such that the trigger is accessible through the groove, the first gap, and the second gap.

SYRINGE PUMP SYSTEM FOR PULSE-FREE METERING AND PRECISE MIXING IN HPLC UHPLC, MICRO-HPLC AND NANO-HPLC

The invention describes a high-pressure syringe pump system for use in the field of HPLC, UHPLC, micro-HPLC and nano-HPLC in gradient operation. The different solvents are compressed independently by passive non-return valves, the solvent combination does not take place until at an identical pressure, and the target pressure for the initialization is achieved by a control setting with a higher delivery capacity, in which the compressibility is also taken into consideration. The changing of solvents and the flushing of the pump heads take place by way of separate inlets and outlets in the throughflow via an active multiple-position high-pressure valve which can also close the pump head and can open it via the passive non-return valve. The regulating unit and the drive motor which also serves as force sensor detect compressibility, air inclusions and leaks. Depending on the embodiment, the syringe pump heads are stabilized thermally. 1. A syringe pump system for HPLC with at least two solvents , having two mutually independent syringe pumps coupled to form a binary system and each having a pump cylinder that is connected with a multi-position valve by an outlet connection line that is provided with a respective passive pump outlet valve , a respective intake line , and a respective washing outlet line , each multi position valve having a further outlet line that opens into a common outlet line at a manifold fitting , the pressure required for chromatographic analysis , for each of the solvents , being built up separately in the respective pump cylinders , by the respective pump pistons and on the basis of the respective passive pump outlet valve.2. The syringe pump system according to claim 1 , wherein each syringe pump has a motor as a drive for the respective pump piston and as a force sensor for compression of the respective solvent.3. The syringe pump system according to claim 2 , wherein in addition a controller is provided claim 2 , and that the motor and the ...

Egg food product and method of making an egg food product

An egg food product and a method for making the same. In one embodiment the method of making a food product comprises feeding a liquid composition into a cavity, the liquid composition comprising at least 80% liquid egg comprising albumen and yolk; mixing the liquid composition in the cavity; raising the temperature of the mixed liquid composition to above 175° F.; and after raising the temperature, extruding the mixed liquid composition through a die cavity having a temperature greater than 175° F. to solidify and shape the mixed liquid composition into a solid composition; and cutting the solid composition to a desired length.

ELECTRIC LINEAR-ACTUATOR PUMPING SYSTEM

A pumping system includes at least three electrically driven pumping units. Each pumping unit includes a linear actuator driven by at least one electric motor and driving a shaft. Pistons on each end of the shaft move within fixed cylinders to draw fluid from an inlet and expel the fluid to an outlet. Each pumping unit draws fluid at one end while expelling an equal quantity of fluid at the opposite end. The shaft velocity is controlled such that a total flow of the pumping system is constant, eliminating flow ripple. 1. A pumping system comprising:a fluid inlet;a fluid outlet; and a threaded shaft fixed to a piston such that axial movement of the piston in a first direction draws fluid from the inlet and axial movement of the piston in a second direction expels fluid to the outlet,', 'an axially fixed nut engaging the threaded shaft such that rotation of the nut results in proportional axial movement of the shaft, and', 'one or more electric motors drivably connected to the nut., 'three or more pumping units, each pumping unit having'}2. The pumping system of wherein:the piston is fixed to one end of the shaft; anda second piston is affixed to an opposite end of the shaft such that axial movement of the second piston in the first direction expels fluid to the outlet and axial movement of the second piston in the second direction draws fluid from the inlet.3. The pumping system of wherein each of the one or more electric motors drivably connected to the nut comprises:a ring gear fixed to the nut;a plurality of rotors, each fixed to a pinion gear engaging the ring gear, anda plurality of stators, each configured to establish a magnetic field to exert torque on a respective rotor in response to an electric current.4. The pumping system of further comprising a controller programmed to command the pumping units to produce a repeating trapezoidal flow rate comprising increasing stages claim 1 , steady stages claim 1 , and decreasing stages claim 1 , wherein pumping units ...

Pumping apparatus for delivering liquid at high pressure

CONTROL ARRANGEMENT AND METHOD FOR OPERATING DIAPHRAGM PUMP SYSTEMS

A diaphragm pump system that includes a pair of working fluid diaphragm pump assemblies that are each fluidly connected to a working fluid flow. Each working fluid diaphragm pump assembly is operationally associated with a discrete drive arrangement that is fluidly isolated from the working fluid flow that is moved during operation of the pump system. A control arrangement is connected to the discrete drive arrangements and configured to control the cyclic operation of the pair of working fluid diaphragm pump assemblies to mitigate pulsatile effects in the combined working fluid flow when the discharges of the working fluid flows associated with operation of the pair of working fluid diaphragm pump assemblies is combined. 1. A diaphragm pump system comprising:a first pump assembly and a second pump assembly, each of the first pump assembly and the second pump assembly having a diaphragm that is independently movable relative to the diaphragm of the other of the first pump assembly and the second pump assembly;an inlet manifold fluidly connected to an inlet side of each of the first pump assembly and the second pump assembly;a discharge manifold fluidly connected to a discharge side of each of the first pump assembly and the second pump assembly;a first diaphragm retracting assembly connected to the first pump assembly and configured to manipulate movement of the diaphragm of the first pump assembly and a second diaphragm retracting assembly configured to manipulate movement of the diaphragm of the second pump assembly; anda control arrangement connected to the first diaphragm retracting assembly and the second diaphragm retracting assembly and configured to oscillate operation of the of the first pump assembly and the second pump assembly in response to information from a first position indicator operatively associated with the first diaphragm retracting assembly and a second position indicator operatively associated with the second diaphragm retracting assembly to ...

Constant-flow-rate dual-unit pump

A dual-unit pump, e.g., a rolling diaphragm piston pump, suitable for pumping an abrasive high-viscosity slurry, is adapted to operate at a constant flow rate by means for detecting and correcting a pressure differential in the two units before the units switch from the pumping cycle to the filling cycle and vice versa. The flow of liquids is controlled by valves of the type which switch the flow to and from the units with essentially no volume change in the liquid inlet and outlet lines.

Pulsation free pump

The invention provides a pulsation free pump which includes a plurality of hydraulic diaphragm pumps, a plurality of plungers corresponding to the hydraulic diaphragm pumps, each of the plungers performing a reciprocal movement which provides a pumping cycle operation of corresponding one of the plurality of hydraulic diaphragm pumps and an adjustable exhaust differential pressure regulating valve. Each of the pumping cycles includes a discharge process and a subsequent suction process. A controller is provided for controlling reciprocal movements of the plungers in association with each other at a predetermined difference in phase of the pumping cycle. The controller controls the reciprocal movement of each of the plungers so as to set a preliminary pressure-rising process just before the discharge process so that a discharge flow rate of each of the diaphragm pumps is initiated to increase without any time delay when the pumping cycle enters into the discharge process so that a total discharge flow rate defined by the sum of the discharge flow rates of all of the plungers is kept constant and free of any substantial pulsation.

Fluid pump

A peristaltic pump comprising (i) two fluid flow tubes; (ii) two pressure members operable to urge fluid flow through the tubes, the pressure members being mounted on a common rotatable element and operating with a phase difference between their respective movement cycles; and (iii) a non-return valve in each tube downstream of its region of contact with the associated pressure member; wherein for each of the two tubes there is no more than one associated pressure member; the arrangement being such that the first valve opens at a differential fluid pressure corresponding to that at which the second pressure member releases the second tube and (b) the second valve opens at a differential fluid pressure corresponding to that at which the first pressure member releases the first tube, so that the opening of the first valve coincides with cessation of flow in the second tube.

Fluid pump

Reciprocating type fluid delivery pump

A reciprocating type fluid delivery pump has a driving motor, plungers for driving two pump heads, respectively, and a converting mechanism for converting the rotational motion of the driving motor into a reciprocating motion of each plunger. The converting mechanism includes a cam having such a configuration that, when the driving motor is rotated at constant velocity, the delivery flow rate during the delivery starting period of each of the plungers is in excess of that during the other periods of the cycle. The speed of rotation of the driving motor is reduced during the excess delivery period according to need. Thus, the load on the driving motor is reduced and it is therefore possible to employ a driving motor having a relatively low output. The delivery pump also includes a rinsing chamber for each plunger for allowing pressurized fluid to pass therethrough. The rinse chamber includes a rinse pump which uses the reciprocal movement of the pump piston for the rinse mechanism.

Pump

The invention relates to a pump system for providing and maintaining a controlled outflow, comprising a couple of piston pump units ( 1 a , 1 b ), having at least two cylinders ( 2 a , 2 b , 2 c , 2 d ) each with a piston ( 3 a , 3 b , 3 c , 3 d ) slidably arranged in each cylinder. It further comprises devices for controllably moving the piston in each cylinder, namely by an eccentric wheel ( 15 a , 15 b , 15 c , 15 d ) for each of the pistons, acting on one end thereof. There is also provided a control unit for dynamically changing the speed of movement of the devices for moving the piston, in response to pressure changes in the system on the pressure side, for maintaining a desired flow out of the pump. The pump system further comprises switching valves ( 10 a , 10 b ) for proportioning solutions to be mixed according to a predetermined ratio, the valves being switchable between each source of solutions (A, B, A′, B′) and are controlled by a control unit having integrating method for integrating the flow during suction from a first source of solution to be mixed, and a method for switching to another source of solution when the integration corresponds to the predetermined proportion of the solution being sucked.

Double piston pump

Flow control pump

泵

由于阀多,压力损失大,泵的可靠性也低。或者,增减泵室容积的周期长,即使将压力元件使用于驱动隔膜的致动器,也不能以高频驱动。或者,在高负荷压力下,流量不出。解决方法是使动作流体流入泵室的入口流路的合成惯性值比使动作流体由泵室流出的出口流路的合成性值小,再者,入口流路具备流阻元件,以使动作流体流入泵室时的流阻比流出时的流阻小。

Pump with inertance value of the entrance passage being smaller than an inertance value of the exit passage

Since many valves are used, pressure loss is large, resulting in low reliability of a pump. Even when the period of increasing and decreasing the volume of a pump chamber is long, and a piezoelectric element is used as an actuator that drives a diaphragm, a driving operation cannot be performed at a high frequency, or a proper flow rate cannot be realized under a high load pressure. In accordance with the invention, the combined inertance value of an entrance passage used to make working fluid flow into a pump chamber is smaller than the combined inertance value of an exit passage used to make the working fluid flow out from the pump chamber. A fluid resistance member is provided at the entrance passage in which fluid resistance when the working fluid flows into the pump chamber is smaller than fluid resistance when the working fluid flows out of the pump chamber.

Pump

Syringe pump system for pulse-free metering and precise mixing in hplc, uhplc, micro-hplc and nano-hplc

The invention describes a high-pressure syringe pump system for use in the field of HPLC, UHPLC, micro-HPLC and nano-HPLC in gradient operation. The different solvents are compressed independently by passive non-return valves, the solvent combination does not take place until at an identical pressure, and the target pressure for the initialization is achieved by a control setting with a higher delivery capacity, in which the compressibility is also taken into consideration. The changing of solvents and the flushing of the pump heads take place by way of separate inlets and outlets in the throughflow via an active multiple-position high-pressure valve which can also close the pump head and can open it via the passive non-return valve. The regulating unit and the drive motor which also serves as force sensor detect compressibility, air inclusions and leaks. Depending on the embodiment, the syringe pump heads are stabilized thermally.

Pumping apparatus

A compact pumping system especially useful in liquid chromatography wherein comprising a liquid path which is fully flushed in each stroke of a pump, a pump which provides substantially pulse-free flow, a pressure-sensor integrated into said flow path and operably connected to the control circuit of a bifilar stepping motor. This circuit is so designed that the driving current applied to the motor is only that required to pump the liquid. The avoiding of heat associated with a greater current is particularly important in forming a compact package of motor and pump for use in liquid chromatography.

Flow control system for liquid chromatographs

A flow control system including a pump for delivering a carrier containing isocratic or gradient controlled elution solvents under pressure to a liquid chromatographic column at a substantially constant selected controlled flow rate.

Membrane fluid pump

The invention relates to a membrane fluid pump(1), comprising a drive shaft (2) rotatable within the membrane fluid pump. The shaft is equipped with a number of eccentrics (7) arranged axially along the shaft(2). The membrane fluid pump further comprises a set of connecting rods(3, 4)being connected to each of the eccentrics(7), where in each connecting rod (3, 4) is attached between one of the eccentrics (7) on the shaft (7) and a membrane (3'', 4''), so that each of the connecting rods(3, 4)is arranged to transfer a rotating movement of the shaft (2) to a reciprocating movement pattern of each the membrane(3'', 4''). Each of the eccentrics (7) and the connecting rods (3, 4)are arranged in such a manner that all of the membranes (3'', 4'') will reciprocate with a phase shift evenly distributed over a 360 degree rotation of the drive shaft(2), and wherein all of the eccentrics (7) are rotationally offset to each other with an angle so that they are evenly distributed over a 360 degree rotation of the drive shaft(2).

Bellows pump apparatus

작동 유체의 흡입으로부터 토출로 전환될 때에 발생하는 충격 압력을, 이미 설치된 벨로우즈 펌프에서도 용이하게 억제할 수 있는 벨로우즈 펌프 장치를 제공한다. 벨로우즈 펌프 장치는, 밀폐된 2개의 공기실(21, 26) 중, 한쪽의 공기실(26)에 가압 공기를 공급함으로써 벨로우즈(13, 14)를 신장 동작시켜 이송 유체를 흡입하고, 다른 쪽의 공기실(21)에 가압 공기를 공급함으로써 벨로우즈(13, 14)를 수축 동작시켜 이송 유체를 토출한다. 이 벨로우즈 펌프 장치는, 한쪽의 공기실(26)에 공급하는 가압 공기의 제1 공기압, 및 다른 쪽의 공기실(21)에 공급하는 가압 공기의 제2 공기압을 조정하는 전공 레귤레이터(51, 52)와, 벨로우즈(13, 14)의 신장 동작 시에서의 적어도 신장 종료 시점에서, 제1 공기압이 제2 공기압보다도 낮아지도록 전공 레귤레이터(51, 52)를 제어하는 제어부(6)를 구비하고 있다. There is provided a bellows pump device capable of easily suppressing an impact pressure generated when switching from suction to discharge of a working fluid, even with an already installed bellows pump. The bellows pump device extends the bellows 13 and 14 by supplying pressurized air to one of the two air chambers 21 and 26 that are sealed to suck the conveying fluid, and the other By supplying pressurized air to the air chamber 21, the bellows 13 and 14 are contracted to discharge the conveying fluid. The bellows pump device is an electric power regulator 51, 52 that adjusts a first air pressure of pressurized air supplied to one air chamber 26 and a second air pressure of pressurized air supplied to the other air chamber 21. ), and a control unit 6 that controls the electric power regulators 51 and 52 so that the first air pressure becomes lower than the second air pressure at least at the time of completion of the extension at the time of the extension operation of the bellows 13 and 14.

Reciprocating pump

내용 없음. No content.

液体输送系统

提供可以缩短泵的上升时间的液体输送系统。本发明的液体输送系统具有第一和第二泵以及吸入口和排出口，第一和第二泵具有柱塞，将通过上述吸入口吸入的液体经过上述第一、第二泵从上述排出口排出。启动运转模式停止上述第二泵、只使上述第一泵动作。上述排出口的排出压力达到规定值时，将启动运转模式切换到稳定运转模式。稳定运转模式停止上述第一泵，只运转上述第二泵。

波纹管泵装置

提供一种波纹管泵装置，即使是已经设置的波纹管泵，也能够容易地抑制在从工作流体的吸入向排出切换时所产生的冲击压力。波纹管泵装置对密闭的2个空气室(21、26)中的一个空气室(26)供给加压空气，由此使波纹管(13、14)进行伸长动作而将转送流体吸入，对另一个空气室(21)供给加压空气，由此使波纹管(13、14)进行收缩动作而将转送流体排出。该波纹管泵装置具有：电动气压调节器(51、52)，其对向一个空气室(26)供给的加压空气的第1空气压力、以及向另一个空气室(21)供给的加压空气的第2空气压力进行调整；以及控制部(6)，其以下述方式对电动气压调节器(51、52)进行控制，即，在波纹管(13、14)的伸长动作时的至少伸长结束时刻，使得第1空气压力低于第2空气压力。

Compact pump with reduced vibration and reduced thermal degradation

A positive displacement reciprocating multi-cylinder pump has a pair of cams and associated bearings and yokes that cooperatively and positively reciprocate the pistons. The fluid flow paths are configured through specially designed intake and outlet manifolds to provide intrinsic cooling of the bearings through specially configured fluid flow paths at distal ends of the pump. An intentional head geometry that is identical for each piston may be readily machined using exterior bores. Each head defines a cylinder, captures both inlet and outlet one-way valves, and provides essential fluid flow paths about the cylinders. All bearings are of the sealed type, and no additional oil baths or the like are required, permitting the pump to be stored, transported, and used in any orientation.

High-pressure pump for fuel gas

FIELD: power engineering. SUBSTANCE: invention relates to the field of power engineering. Low-temperature fuel pumping system from fuel source to ensure uniform output without pulsations comprises multi-axis electronic controller including software; a plurality of linear pumps, each including: an upper drive portion and a lower hydraulic portion, the drive portion having a linear drive system terminating on a drive shaft, which linearly moves back and forth along the axis; drive system of drive part of each pump is made with possibility of independent adjustment by means of software contained in multi-axis electronic controller; hydraulic part has piston attached to driving shaft of drive part for linear movement back and forth inside cylinder of hydraulic part of pump, wherein the piston has a head with a plurality of spaced apart piston rings, which provide a sealed movable contact with the inner cavity of the cylinder of the hydraulic part of the pump; absence of hydraulic seals in lower hydraulic part; inlet channel hydraulically connected to low-temperature fuel source and leading to lower end of each cylinder of hydraulic part of pump and to connection through valve with air layer of open head and located under piston head, wherein piston upward movement creates negative pressure drop in air layer, sufficient to let low-temperature fuel into air layer, and displacement down piston displaces low-temperature fuel through lower flow channel and into outlet common for all cylinders of hydraulic part of pump; sealed housing arranged around and completely closing one or more linear pump, each of which includes upper drive part and lower hydraulic part, wherein the housing is hermetically sealed to house the low-temperature fuel which volatiles from the pump hydraulic pump cylinder; wherein system operation includes coordinated actuation of separate pumps to provide profile without pulsations of output pressure. EFFECT: invention allows increasing service life of ...

Breast pump

Liquid feed pump apparatus

本发明公开一种流体供给泵装置，其中调节通道与第一和第二泵机构平行相连。从泵头送出的流体被分离，一部分流体送入出口端侧，而剩余的流体通过调节通道返回到进口端侧。调节通道具有一个限流器用来将流速设定成100μL/min到1mL/min，2MPa到20Mpa或大约的压力。在微型LC和超小型LC中，体积流速是100nL/min到10μL/min或大约这样大的流速，几兆帕到20MPa或大约这样大的压力。因此，0.1％到1％从泵机构送出的流体从出口端输送，而剩余的流体流过调节通道并被返回至进口端侧。

Pump unit with two pumps, system, application, and method

FIELD: engines and pumps. SUBSTANCE: device comprises two pumps, each including pumping cylinder, and reciprocating pumping piston. Pumping piston confines pumping chamber in pumping cylinder communicated with fluid pump port. Actuator is connected with pumping piston. Proposed device comprises also the means to define magnitude dependent upon pumping piston position in pumping cylinder. Besides, it comprises first set of valves communicating every port of pump unit with feed line and discharge line. Note here that pump comprises fluid flow controller to adjust fluid flow by magnitude dependent upon pumping piston position in pumping cylinder. EFFECT: controlled fluid pressure, continuous or pulsating flow. 22 cl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 474 726 (13) C1 (51) МПК F04B 23/04 F04B 49/06 F04B 9/117 F04B 13/00 (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2011131775/06, 18.12.2009 (24) Дата начала отсчета срока действия патента: 18.12.2009 (73) Патентообладатель(и): АЛЬФА ЛАВАЛЬ КОРПОРЕЙТ АБ (SE) (45) Опубликовано: 10.02.2013 Бюл. № 4 2 4 7 4 7 2 6 (56) Список документов, цитированных в отчете о поиске: US 6135724 A, 24.10.2000. RP 1437509 A2, 14.07.2004. US 4090695 A, 23.05.1978. US 6135719 A, 24.10.2000. US 2003118459 А1, 26.06.2003. (85) Дата начала рассмотрения заявки PCT на национальной фазе: 29.07.2011 2 4 7 4 7 2 6 R U (87) Публикация заявки РСТ: WO 2010/076243 (08.07.2010) C 1 C 1 (86) Заявка PCT: EP 2009/067522 (18.12.2009) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры" (54) НАСОСНОЕ УСТРОЙСТВО С ДВУМЯ НАСОСНЫМИ АГРЕГАТАМИ, СИСТЕМА, ПРИМЕНЕНИЕ И СПОСОБ (57) Реферат: Настоящее изобретение относится к насосному устройству, к системе, содержащей такое насосное устройство, и способу накачивания текучих сред в насосном устройстве. Устройство содержит два насосных агрегата, каждый из которых ...

High pressure fluid generating device

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Method and device for desalinating water while overcoming decreases in pressure

本发明涉及一种通过反渗来持续淡化水尤其是淡化海水的方法和设备。根据本发明：海水(10)在第一压力(p1)下由一个输送泵(1)导入一个压力补偿装置(2)；海水(11)在第二增大压力(p2)下被从压力补偿装置(2)持续导入一个膜组件(3)，并且，在膜组件内部，盐水被一个膜(6)分成淡化水(12)和浓缩盐水(13)；从膜组件(3)排放的浓缩盐水(13)在近似第二压力(p2)作用下导入压力补偿装置(2)，并在该装置中用于将导入压力补偿装置(2)的盐水(10)上的压力增加至近似第二压力(p2)，并用于将盐水(11)导入膜组件(3)。为了防止由于膜表面流动减弱造成的工作失常以及可能的损坏膜(6)，本发明通过从一个贮存器(15；403；20)排放的水而维持导入膜组件(3)的盐水(11)在膜(6)的膜表面上持续流动。

Method of transfer of fluid and pumping unit

FIELD: transfer of fluids and filling of containers. SUBSTANCE: suction and delivery strokes are performed in each pump chamber of pumping unit by connecting the pump chamber bears in turn with inlet and outlet passages due to stage-by-stage maneuvering of distributing unit. Part of suction stroke in one pump chamber is effected simultaneously with part of suction stroke in other pump chamber due to simultaneous connection of pump chambers with inlet hole. Inlet passage of pumping unit occupies larger portion of peripheral surface of valve for simultaneous connection of pump chambers with inlet passage. Each pump chamber is provided with flexible movable wall supported by front ends of piston. Pump chambers are located in common plane. Axis of rotation of valve is located at right angle relative to central axis of pistons. EFFECT: enhanced reliability. 10 cl, 7 dwg 9799%9140с ПЧ ГЭ РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ ВИ ”” 2 075 646 (51) МПК (13) Сл Е 04В 7/00 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 5052954/06, 26.08.1992 (30) Приоритет: 27.08.1991 1Т М!91АОО2291 (46) Дата публикации: 20.03.1997 (56) Ссылки: Патент Швейцарии М 471317, кл. Е 04 В 7/00, 1969. (71) Заявитель: Тетра Брик Рисерч энд Дивелопмент, С.п.А (1Т) (72) Изобретатель: Паоло Фонтанацци[П], Альберто Фини[П] (73) Патентообладатель: Тетра Брик Рисерч энд Дивелопмент, С.п.А (1Т) (54) СПОСОБ ПЕРЕКАЧИВАНИЯ ТЕКУЧЕЙ СРЕДЫ И НАСОСНЫЙ БЛОК (57) Реферат: Использование: для перекачивания текучей среды и последующего заполнения ей упаковочных контейнеров. Сущность изобретения: в части способа в каждой насосной камере насосного блока производят такты всасывания и нагнетания путем поочередного соединения насосных камер с впускным и выпускным каналами за счет поэтапного маневрирования распределительным блоком. Маневрируют распределительным блоком таким образом, что по меньшей мере, часть такта всасывания в одной из насосных камер производят одновременно с частью ...

Pasty mass transportation method, and pumping unit for pasty mass transportation

FIELD: engines and pumps. SUBSTANCE: each cylinder is connected through an inlet opening closed with its associated inlet damper to a prefill tank. Each cylinder is connected through an outlet opening closed with its associated outlet damper to a transportation pipeline, in which pasty mass is transported from the prefill tank to the appropriate tank during cylinder suction stroke at the open inlet opening and the closed outlet opening, and pasty mass is transported to a transportation pipeline during cylinder discharge stroke at the open outlet opening and the closed inlet opening. A piston speed during suction stroke is higher than that during discharge stroke. At the end, near the end or immediately after the end of the suction stroke, the inlet opening is closed by means of the inlet damper; after that, pasty mass is compressed in the cylinder before the outlet opening is opened. EFFECT: continuous uniform transportation of pasty mass and satisfactory sealing of the inlet opening is provided. 25 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 477 813 (13) C1 (51) МПК F04B 15/02 (2006.01) F04B 7/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2011134273/06, 14.01.2010 (24) Дата начала отсчета срока действия патента: 14.01.2010 (72) Автор(ы): ШВИНГ Фридрих (DE), ШВИНГ Штефан (DE) (45) Опубликовано: 20.03.2013 Бюл. № 8 2 4 7 7 8 1 3 (56) Список документов, цитированных в отчете о поиске: DE 102005008938 A1, 31.08.2006. RU 2193110 C2, 20.11.2002. SU 848744 A1, 23.07.1981. ЕР 0057288 А1, 11.08.1982. DE 19503986 A1, 08.08.1996. DE 10240256 A1, 11.08.2004. 2 4 7 7 8 1 3 R U (86) Заявка PCT: EP 2010/000161 (14.01.2010) C 1 C 1 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 16.08.2011 (87) Публикация заявки РСТ: WO 2010/081695 (22.07.2010) Адрес для переписки: 129090, Москва, ул.Б.Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. А.В.Мицу, рег.№ 364 (54) ...

Load balancing device

FIELD: mechanical engineering. SUBSTANCE: invention relates to the field of mechanical engineering, in particular to load balancing devices. The device contains a metering valve (1) with the number of dosing channels equal to the number of pumps connected in parallel (7, 8), with a spring (2) in one of the end cavities of the valve spool (1), returning the spool to the open position; a differential pressure regulator (3) on the valve (1) through the pump channel with minimum pressure, the regulating edge of which is connected to the spring cavity of the valve spool (1); minimum pressure selector (4) for connecting the differential pressure regulator on the valve (1) to the pump channel with minimum pressure; and differential pressure regulators (5, 6) in each channel of the valve (1) installed in the connection lines of pumps (7, 8) to the valve (1) to equalize the pressure at the entrances to the channels of the valve (1). EFFECT: invention is aimed at uniform load distribution between plunger pumps connected in parallel to the common flow line. 1 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 761 258 C1 (51) МПК F04B 23/06 (2006.01) F04B 11/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F04B 23/06 (2021.05); F04B 11/005 (2021.05) (21)(22) Заявка: 2020121736, 30.06.2020 (24) Дата начала отсчета срока действия патента: Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 30.06.2020 (45) Опубликовано: 06.12.2021 Бюл. № 34 2 7 6 1 2 5 8 R U (54) Устройство выравнивания нагрузки (57) Реферат: Изобретение относится к области машиностроения, в частности к устройствам выравнивания нагрузки. Устройство содержит дозирующий кран (1) с количеством каналов дозирования, равным количеству подключаемых параллельно насосов (7, 8), с пружиной (2) в одной из торцевых полостей золотника крана (1), возвращающей золотник в открытое положение; регулятор перепада давления (3) на кране (1) по каналу насоса с ...

Liquid-supplying system

本发明提供一种液体供给系统，即使在以含有浆料的超低温液体为送液对象时其也能够实现稳定的泵动作。该液体供给系统通过波纹管(41、42)的伸缩来供给含有浆料成分的超低温液体，其特征在于，波纹管(41、42)中的至少液体接触的区域由低温脆化温度为液体供给系统的使用温度以下的树脂所涂覆。

Multicylinder type reciprocating pump

(57)【要約】 【課題】 ピストンポンプにおいて脈動のない出力を得 ることができるようにする。 【解決手段】 ピストンポンプ１２はサーボモータ１４ により駆動される。ピストンポンプ１２の圧力は圧力セ ンサ１６によりポンプサイクル毎にサンプリングされ、 コンピュータ２０はサンプリング値から補償圧力曲線を 演算する。サーボモータ１４はこの補償圧力曲線によっ て制御され、結果として脈動のないポンプ出力が得られ る。

Hydraulic pressure generation unit with pneumatic actuation

气动致动的液压产生单元，尤其是低压空气致动的多功能单元，由至少一个泵(1)形成，优选两个包括气动缸(5)的自动化的气动泵(1和2)，气动缸(5)具有中间柱塞(7)，以及两个对称且相对的液压柱塞(8和9)，液压柱塞(8和9)限定了不同容量的各自的上部液压室(1A和2A)和下部液压室(1B和2B)，其中因为泵(1和2)互相平行且异相地工作，减少了所需油量且消除了油的脉冲运动。

Electronic control system of engine for piston pump

FIELD: engines and pumps. SUBSTANCE: electronic control system (10) of engine for piston pump consists of two (or more) pumps, equipped with crank drive (14) of both pumps (12). In the system there is not mechanical cam shaft, and its function is implemented with programme algorithm. Algorithm is under instruction and forms unique speed graph of output gear, which simulates speed graph of mechanical cam shaft. For practical purposes the speed graph of output gear is called cam profile since programme acts ass imaginable cam shaft. In the algorithm there used is evaluation of shaft crank angle, formation of under-instruction curve, smoothing and prediction. EFFECT: decreasing speed fluctuation caused with unexpected abrupt pressure changes. 5 cl, 4 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 431 764 (13) C2 (51) МПК F04B F04B F04B G06F 49/20 (2006.01) 49/06 (2006.01) 9/00 (2006.01) 19/00 (2011.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009115665/07, 25.09.2007 (24) Дата начала отсчета срока действия патента: 25.09.2007 (73) Патентообладатель(и): ГРАКО МИННЕСОТА ИНК. (US) R U Приоритет(ы): (30) Конвенционный приоритет: 26.09.2006 US 60/826,997 (72) Автор(ы): СИДЛЯРЕВИЧ Тимоти (US), КЭМПБЕЛЛ Джеймс (US), МЕТЦА Джон (US) (43) Дата публикации заявки: 10.11.2010 Бюл. № 31 2 4 3 1 7 6 4 (45) Опубликовано: 20.10.2011 Бюл. № 29 (56) Список документов, цитированных в отчете о поиске: RU 41811 U1, 10.11.2004. SU 1671969 А1, 23.08.1991. US 5114314 А, 19.05.1992. DE 198449785 С1, 16.03.2000. WO 0246612 А1, 13.06.2002. 2 4 3 1 7 6 4 R U (86) Заявка PCT: US 2007/079436 (25.09.2007) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 27.04.2009 (87) Публикация заявки РСТ: WO 2008/039787 (03.04.2008) Адрес для переписки: 103735, Москва, ул. Ильинка, 5/2, ООО "Союзпатент", пат.пов. С.Б.Фелицыной, рег. № 303 (54) ЭЛЕКТРОННАЯ СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ ДЛЯ ПОРШНЕВОГО НАСОСА ...

Pumping system for chromatography applications

A pumping system for compressible fluids comprises a first pump (20) having a first pump outlet (21) and a second pump (30) having a second pump outlet (31), wherein the first pump outlet (21) and the second pump outlet (31) merge in a junction (40) which is in fluid communication with a main outlet (48). The pumping system further comprises a control (50) to regulate the output pressure (p2) of the second pump (30) on the basis of a measurement of the output pressure (p1) of the first pump (20). The corresponding method of operating a pumping system is also disclosed.

Methods and devices for modulation of the operating point of liquid pumps in medical treatment devices

Fluid pumps and medical treatment devices, in particular dialysis machines, include devices configured such that operating pressures and flow rates of the fluid pumps assume desired characteristics, in particular constant values or controlled profiles. The operating point of a peristaltic hose roller pump is adjusted based on an angle of rotation of a pump rotor, or by adjusting the operating point of a centrifugal pump in accordance with a profile.

METHOD FOR TRANSPORTING PASTE MASSES AND PUMPING DEVICE FOR TRANSPORTING PASTE MASSES

1. Насосное устройство для транспортировки пастообразных масс, содержащее поршневой насос с цилиндром (1), который имеет поршень (2), и который соединен через ограниченное очковой пластиной впускное отверстие (3, 103, 203), выполненное с возможностью закрытия с помощью впускной заслонки (4, 104, 204), с резервуаром (5) предварительного заполнения, при этом впускная заслонка (4, 104, 204) имеет обращенную внутрь корпуса (31) заслонки закрывающую поверхность, при этом впускная заслонка (4, 104, 204)- имеет поворотное основное тело (11, 41, 141, 241),- закрывающая поверхность по меньшей мере частично образована поверхностью подвижного относительно основного тела поршня, выполненного с возможностью погружения в выполненное в основном теле (11, 41, 141, 241) закрытое полое пространство (42, 142, 242), когда с внутренней стороны корпуса (31) заслонки на поршень действует давление среды,- в полом пространстве предусмотрена текучая среда, которую можно сжимать за счет погружения поршня,- предусмотрено выполненное в виде кольцевого поршня режущее кольцо (10, 40, 140, 240), которое имеет поверхность, которая обращена к полому пространству (12 и 12а, 42, 142, 242), и которое в закрытом положении впускной заслонки (4, 104, 204) прижимается за счет давления текучей среды к очковой пластине.2. Насосное устройство по п.1, отличающееся тем, что впускная заслонка (4, 104, 204) имеет предварительно напряженный пружинный элемент (22, 52, 152, 252), который действует на поршень в том же направлении, что и давление среды.3. Насосное устройство по п.2, отличающееся тем, что пружинный элемент выполнен в виде тарельчатой пружины (52, 152, 252) или образован с помощью нескольких тарельчатых пружин.4. Насосное устройство по люб РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК F04B 7/00 (11) (13) 2011 134 273 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2011134273/06, 14.01.2010 (71) Заявитель(и): ШВИНГ Фридрих (DE), ШВИНГ Штефан (DE) ...

Low noise high efficiency solenoid pump

A low noise, high efficiency solenoid pump includes a housing containing a hollow electromagnetic coil. Within the coil resides a pump assembly defining a tubular body having a pair of opposed ends which respectively include an inlet or suction port and an outlet or pressure port and within which a plunger or piston resides. The piston is biased in opposite directions by a pair of opposed compression springs. A first compression spring limits and arrests travel of the piston during the suction or return stroke and a second compression spring limits travel of the piston during the pumping stroke and returns the piston after the pumping stroke. The piston includes a first check valve that opens to allow hydraulic fluid into a pumping chamber during the suction stroke and closes during the pumping stroke to cause fluid to be pumped out of the pumping chamber. A second check valve opens to allow pumped fluid to exit the pumping chamber and the pump body through the outlet or pressure port and closes to inhibit reverse flow.

Control method of pulsation-free pump and pulsation-free pump

Patent JPH0243031B2

pump

Control of electric camshaft motor for piston pump

Liquid supply apparatus

本发明提供一种与将液体供给至医疗设备的液体供给装置有关的技术。该液体供给装置是将液体供给至医疗设备的液体供给装置，具备泵机构、流路以及流路变形部，其中，泵机构具备能够在进行了液体的送液动作后进行液体的吸入动作的第一泵、和能够在第一泵进行送液动作过程中进行液体的吸入动作并且在第一泵进行吸入动作过程中进行液体的送液动作的第二泵，流路构成为包括弹性部件且与第一泵以及第二泵连通并将液体供给至医疗设备，流路变形部使流路的一部分变形，流路变形部在第一泵从送液动作被切换至吸入动作之前开始流路的第一变形，在第二泵进行送液动作过程中流路的第一变形结束并开始流路的第二变形。

Direct movement type reciprocating pumping device

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

High pressure pump for pumping high viscosity materials

一种用于泵送流体胶泥的的正排量泵包括多个缸体，其中所述缸体各自具有被布置成在缸体内往复运动的活塞。活塞在第一方向上的移动将流体抽吸到缸体中，并且第二相反方向上的移动将流体泵送出缸体。变速电动机驱动式地联接到将往复驱动提供到活塞的凸轮布置。凸轮布置包括凸轮，其中凸轮被塑形并布置成在不到旋转周期的一半期间在第一方向上驱动每一活塞并在旋转周期的剩余部分期间在第二方向上驱动每一活塞。凸轮被布置成相互异相地驱动活塞。

Patent RU2017132299A3

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2017 132 299 A (51) МПК F04B 9/04 (2006.01) F04B 15/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2017132299, 29.01.2016 (71) Заявитель(и): КАРЛАЙЛ ФЛУИД ТЕКНОЛОДЖИЗ ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 18.02.2015 GB 1502686.7 09 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 18.09.2017 GB 2016/050202 (29.01.2016) (87) Публикация заявки PCT: A WO 2016/132097 (25.08.2016) Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" R U (57) Формула изобретения 1. Насос объемного действия, выполненный с возможностью нагнетания текучей мастики, содержащий: несколько цилиндров, каждый из которых имеет поршень, выполненный с возможностью возвратно-поступательного движения внутри цилиндра, при этом перемещение поршня в первом направлении способно всасывать текучую среду в цилиндр, а движение во втором, противоположном направлении, способно нагнетать текучую среду из цилиндра; и электродвигатель с переменной скоростью, с возможностью передачи приводного усилия на кулачковый механизм, обеспечивающий возвратно-поступательное движение поршней, при этом кулачковый механизм содержит кулачки, имеющие форму и выполненные с возможностью приведения в движение каждого поршня в первом направлении менее чем за половину цикла вращения, и приведения в движение каждого поршня во втором направлении в течение оставшейся части цикла вращения, и при этом кулачки выполнены с возможностью приведения в движение поршней не синфазно по отношению друг к другу. 2. Объемный насос по п.1, содержащий три или более цилиндров, при этом кулачки выполнены с возможностью приведения в движение поршней так, что в любом Стр.: 1 A 2 0 1 7 1 3 2 2 9 9 (54) НАСОС ВЫСОКОГО ДАВЛЕНИЯ ДЛЯ НАГНЕТАНИЯ ВЫСОКОВЯЗКОГО МАТЕРИАЛА 2 0 1 7 1 3 2 2 9 9 (86) Заявка PCT: R U (43) Дата публикации заявки: 21.03.2019 Бюл. № (72) Автор(ы): ...

Injection method and injection device for plastic raw material liquid

Rotating piston pump for measuring coating agent

Pump arrangement with two pump units, system and method

본 발명은 2개의 펌프 유닛을 포함하는 펌프 장치에 관한 것이며, 각각의 펌프 유닛은 펌핑 실린더와, 유체를 위한 펌프 포트와 연통하는 펌핑 실린더 내에 펌핑 챔버를 한정하는 왕복 이동 가능한 펌핑 피스톤과, 펌핑 피스톤에 연결된 액츄에이터와, 펌핑 실린더 내의 펌핑 피스톤의 위치에 따른 값을 결정하기 위한 수단을 포함하고, 펌프 장치는 펌핑될 유체를 위한 소스 라인 및 전달 라인에 각각의 펌프 유닛의 펌프 포트를 연결하는 제1 세트의 밸브를 더 포함하고, 펌프 장치는 펌프 유닛 내의 펌핑 피스톤의 위치에 따른 값에 기초하여 펌핑되는 유체의 유동을 조절하기 위한 수단을 포함한다. 본 발명은 또한 그러한 펌프 장치를 포함하는 시스템 및 상기 펌프 장치에서 유체를 펌핑하기 위한 방법에 관한 것이다. The present invention relates to a pump device comprising two pump units, each pump unit comprising a pumping cylinder, a reciprocating pumping piston defining a pumping chamber in a pumping cylinder in communication with a pump port for fluid, and a pumping piston And an actuator connected to the pump and means for determining a value according to the position of the pumping piston in the pumping cylinder, the pump apparatus comprising a first connecting the pump port of each pump unit to a source line and a delivery line for the fluid to be pumped It further comprises a set of valves, wherein the pump device comprises means for adjusting the flow of the pumped fluid based on the value according to the position of the pumping piston in the pump unit. The invention also relates to a system comprising such a pump device and a method for pumping fluid in the pump device.

Hydrostatic machine with axial thrust compensation

A hydrostatic machine (radial piston machine) has a cylinder star rotationally fixed and secured against axial displacement on a shaft and having a plurality of radial bores with displacing elements (pistons and sliding blocks) that slide on the inner face of a hub ring. The bores communicate through control slots with (high/low pressure) delivery channels that open laterally into the cylinder star in order to control the hydraulic mediu flow rate. The cylinder star consists of two mutually spaced rotors whose bores have intercommunicating, in particular opposite control slots. Between both rotors is provided a housing intermediate bottom having control disks (axial disks) opposite to the rotors and provided with channels which correspond to the control slots and with delivery channels which interconnect conjugated channels belonging to both rotors.

Hydrostatic motor with axial thrust offset

A radial hydrostatic motor (radial piston machine) has a cylinder spider rotationally fixed and secured against axial displacement on a shaft and having a plurality of radial bores with pistons and sliding blocks that slide on the inner face of a hub ring or bushing. The bores communicate through control slots with high/low pressure delivery channels that open laterally into the cylinder spider in order to control the hydraulic media flow rate. Two mutually spaced rotors have bores with intercommunicating opposite control slots. Between both rotors is provided a housing intermediate partition having control disks opposite to the rotors and provided with channels which correspond to the control slots.

Method and device for pouring plastic raw material liquid

유체를 간헐적으로 일정량 흡인 토출하는 간헐식 정량 펌프(6)의 복수의 송액부(7a, 7b)를 병렬로 배치하고, 각각의 송액부(7a, 7b)의 흡인 토출의 타이밍을 달리하여 플라스틱 원료액을 토출시키며, 각각의 송액부(7a, 7b)에서 토출된 플라스틱 원료액을 합류시키고, 합류시킨 플라스틱 원료액을 주형 중합형(4)내에 주입한다. 플라스틱 원료액이 점도 상승하더라도 안정하게 송액할 수 있는 동시에, 주입시의 기포의 발생을 억제하여, 생산 수율이 양호하게 된다.

Suitable pump system for chromatographic applications

ELECTRONIC ENGINE CONTROL SYSTEM FOR PISTON PUMP

1. Способ управления системой насосов, имеющей, по меньшей мере, два приводимых кривошипами насоса с возвратно-поступательным движением, со смещенными кривошипами, включающий следующие этапы: ! формирование теоретического графика скоростей для указанных насосов с учетом, по меньшей мере, некоторых из параметров: величина перемещения поршней, объем поршневого штока, длительность возврата поршня, а также геометрические параметры поршневого штока и цилиндра насоса; ! формирование однозначно определяемого графика скорости насоса при работе указанной системы насосов для получения обучением кулачка; ! а также совмещение указанного теоретического кулачка и полученного обучением кулачка. ! 2. Способ по п.1, в котором указанное смещение составляет приблизительно 84°. ! 3. Способ управления системой насосов, имеющей, по меньшей мере, два приводимых кривошипами насоса с возвратно-поступательным движением, со смещенными кривошипами, включающий следующие этапы: ! управление указанной системой насосов при постоянной скорости и регистрация выпускного давления для ряда угловых положений кривошипа; ! формирование графика давления по указанным зарегистрированным значениям выпускного давления; ! преобразование указанного графика для формирования графика скоростей электродвигателя, который снижает колебания давления; а также ! повторение вышеописанных этапов, по меньшей мере, один раз в итерационном процессе до тех пор, пока колебания давления не перестанут превышать заданного значения. ! 4. Способ по п.3, дополнительно включающий этапы контроля колебаний давления при работе; а также регулировки указанного графика ск� РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2009 115 665 (13) A (51) МПК G06F 19/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21), (22) Заявка: 2009115665/07, 25.09.2007 (71) Заявитель(и): ГРАКО МИННЕСОТА ИНК. (US) (30) Конвенционный приоритет: 26.09.2006 US 60/826,997 (87) Публикация PCT: WO 2008/039787 ( ...

METHOD AND SYSTEM FOR FLUID PUMPING USING A PUMP WITH CONSTANT FLOW AT SUCTION OR DELIVERY

- Procédé de pompage de fluide dans des conduits comportant l'utilisation sur ces conduits, d'une pompe à au moins deux unités de pompage alternatif de fluide.- Chaque unité de pompage (PU1, PU2) comprend un cylindre (2) et un piston (1) déplaçable alternativement dans le cylindre sous l'action de moyens moteurs (M), sous le contrôle d'un organe de commande (PC), avec pour les deux pistons des lois de déplacement imposées (f(t), g(t)) convenablement déphasées l'une par rapport à l'autre pour obtenir un premier mode de fonctionnement correspondant soit à un débit d'aspiration sensiblement constant soit à un débit de refoulement sensiblement constant. On fait fonctionner cette pompe dans le même circuit suivant le mode de fonctionnement complémentaire par une inversion du sens de déplacement des pistons de façon à appliquer aux pistons des lois de déplacement (-f (t), -g (t) ) symétriques de celles correspondant au premier mode de fonctionnement. Une telle pompe permet de satisfaire indifféremment à l'un des critères : débit d'aspiration constant ou débit de refoulement constant, selon ce qui est requis à l'emplacement des circuits où elle est placée.- Applications notamment dans le domaine de la chromatographie. - Method for pumping fluid in conduits comprising the use on these conduits, of a pump with at least two alternative fluid pumping units - Each pumping unit (PU1, PU2) comprises a cylinder (2) and a piston (1) movable alternately in the cylinder under the action of motor means (M), under the control of a control member (PC), with for the two pistons imposed laws of displacement (f (t), g (t)) suitably out of phase with respect to each other to obtain a first operating mode corresponding either to a substantially constant suction flow rate or to a substantially constant discharge flow rate. This pump is operated in the same circuit according to the complementary operating mode by reversing the direction of displacement ...

Multi-piston pump for pumping liquid - uses dual piston pumps each with their own hydraulic actuator, with controller monitoring piston positions.

The pump has two piston pumps driven by hydraulic actuators (3a,3b) actuated by fluid under pressure. Each piston (7a,7b) is rigidly coupled to the piston of the hydraulic cylinder and has first (39) and second (55) pressurised fluid supplies. Each hydraulic cylinder is supplied selectively to move one piston in the direction that delivers pressurised fluid and the other in the direction that draws in fluid for the following pressurisation stroke. The position of each of the pistons is monitored by detectors at each end and in the middle of their travel. A control unit responds to the sensors to control delivery of hydraulic fluid to the cylinders. ADVANTAGE - Pump delivers more even flow of fluid under pressure.

Pumping system for fuel injection appts.

The pumping system has two piston-type injection pumps (1a,1b) actuated by two cylinders (3a,3b) driven by hydraulic fluid under pressure. Each piston (7a,7b) of the injection pump is rigidly coupled to the piston (13a,13b) of the associated cylinder. This piston divides the hydraulic cylinder into an inlet chamber and a return chamber into which fluid is admitted in the sense to force down the associated pump. End-of-travel detectors (Ga,Gb) sense the end of travel of the pistons of the hydraulic cylinders. The detectors control valves (39,55) so the cylinder pistons move in the inverse sense to drive the pump to pre-compress fluid drawn in by the pump, and to maintain this pressure till the fluid is required.

Injection press for a product intended for soil treatment.

METHOD AND SYSTEM FOR FLUID PUMPING USING A PUMP WITH CONSTANT FLOW AT SUCTION OR DELIVERY