РОТОРНАЯ ВИНТОВАЯ МАШИНА ОБЪЕМНОГО ТИПА И СПОСОБ ПРЕОБРАЗОВАНИЯ ДВИЖЕНИЯ В ОБЪЕМНОЙ ВИНТОВОЙ МАШИНЕ

Изобретение относится к роторной винтовой машине объемного типа. Машина содержит корпус (30), имеющий основную ось X, и два элемента (10, 20), при этом первый элемент (20) окружает второй элемент (10). Первый элемент (20) шарнирно установлен в корпусе (30) и сам может поворачиваться вокруг своей оси (Xf), совпадающей с основной осью X, согласно поворотному движению, в то время как ось (Хm) второго элемента (10) обращается вокруг оси первого элемента (Xf) согласно движению обращения с длиной Е в качестве радиуса. Машина дополнительно содержит синхронизатор (34; 36; 38; 40), синхронизирующий поворотное движение и движение обращения так, что рабочая среда совершает объемное перемещение, по меньшей мере, в одной рабочей камере (11), ограниченной наружной поверхностью (22) первого элемента (20) и внутренней поверхностью (12) второго элемента (10). Задача изобретения - расширение технического и функциональных потенциалов, уменьшение угловой протяженности термодинамических циклов, повышение КПД ...

НАСОС

Изобретение относится к насосам. Насос содержит корпус, выполненный из двух взаимно пересекающихся частей цилиндра 2, 3, причем на противоположных сторонах предусмотрены входное и выходное отверстия 4, 5. В цилиндрах 2, 3 расположены с возможностью вращения вокруг центральной продольной оси роторы 6 и 7. Большие поперечные оси роторов 6, 7 по меньшей мере в одной фазе движения находятся перпендикулярно друг к другу. Роторы 6, 7 выполнены с возможностью перекатываться с обеспечением герметичности друг по другу и относительно внутренней стенки корпуса. Образующие, исходящие из точки пересечения больших поперечных осей каждого ротора в противоположном друг другу направлении, проходят наклонно к соответствующей центральной продольной оси 8, 9. Каждый ротор охватывает две булавообразные части, соединенные своими более узкими концами друг с другом посредством сужения. Роторы 6, 7 имеют такую конфигурацию и расположены относительно друг друга таким образом, что, если большие поперечные оси обоих ...

УСТРОЙСТВО ДЛЯ ИНЖЕКЦИИ ТЕКУЧЕЙ КОМПОЗИЦИИ В РАСПЛАВЛЕННЫЙ ПОЛИМЕРНЫЙ МАТЕРИАЛ И СПОСОБ ЕГО ИСПОЛЬЗОВАНИЯ

Группа изобретений относится к устройству для инжекции текучей композиции в расплавленный полимерный материал и способу его использования. Устройство (2) содержит первый насос (8) и шестеренный насос (12), расположенные последовательно в потоке текучей среды между резервуаром (4) для текучей композиции, подлежащей инжекции, и выпускным отверстием устройства. Первый насос (8) выбран из диафрагменного насоса и винтового насоса кавитационного типа. Группа изобретений направлена на обеспечение эффективного дозирования широкого спектра типов композиций. 2 н. и 28 з.п. ф-лы, 11 ил.

ШЕСТЕРЕННЫЙ НАСОС

Полезная модель предназначена для подачи рабочей жидкости под давлением в гидравлические системы автомобилей, тракторов, сельскохозяйственных, дорожно-строительных и другой транспортной техники, для перекачивания нефтепродуктов и других неагрессивных жидкостей, а также для подачи рабочей жидкости под давлением в маслосистему различных газоперекачивающих агрегатов и в систему гидравлики современных обрабатывающих центров станкостроения. Шестеренный насос состоит из крышки 1, корпуса 2, ведущей шестерни 3, ведомой шестерни 4, компенсаторов 5, манжет 6 и подшипников 7. В корпусе 2 есть отверстие для подвода рабочей жидкости 8 и отверстие 9 для ее отвода. Ведущая шестерня 3 состоит из двух цапф 10, наружного зубчатого венца 11 и приводного конца 12. Ведомая шестерня 4 состоит из двух цапф 10 и наружного зубчатого венца 11. На одной цапфе 10 ведущей шестерни 3 установлено косозубое колесо 13 с зубьями правого направления, а на другой ее цапфе 10 установлено косозубое колесо 14 с зубьями левого ...

ШЕСТЕРЕННЫЙ ГИДРОМОТОР, ШЕСТЕРЕННЫЙ НАСОС И ПЕРЕДАЧА, ИМЕЮЩАЯ БЕССТУПЕНЧАТО-РЕГУЛИРУЕМЫЕ ПАРАМЕТРЫ

НАСОСНАЯ СИСТЕМА ДЛЯ ПОЛИМЕРНЫХ МАТЕРИАЛОВ

НАСОС

... 1. Насос, содержащий корпус, выполненный из двух взаимно пересекающихся частей цилиндра (2, 3), причем на противоположных сторонах предусмотрены входное и выходное отверстия (4,5) и в каждой части цилиндра (2, 3) расположен вращающийся вокруг ее центральной продольной оси (8, 9) ротор (6, 7), при этом большие поперечные оси роторов по меньшей мере в одной фазе движения находятся почти перпендикулярно друг к другу, а роторы (6, 7) перекатываются плотно друг к другу и относительно внутренней стенки корпуса насоса, причем образующие (12), исходящие из точки пересечения больших поперечных осей каждого ротора (6, 7) в противоположном друг другу направлении проходят наклонно к соответствующей центральной продольной оси (8, 9) и каждый ротор (6, 7) охватывает две почти булавообразные части, которые своими более узкими концами соединены друг с другом посредством сужения, причем роторы (6, 7) имеют такую конфигурацию и расположены относительно друг друга таким образом, что, если большие поперечные ...

ЗАБОЙНЫЕ ДВИГАТЕЛИ И НАСОСЫ С АСИММЕТРИЧНЫМИ ВИНТОВЫМИ ЗУБЬЯМИ

... 1. Устройство для использования в скважине, содержащее:статор, включающий винтовой зуб, имеющий профиль, сформированный вдоль внутренней поверхности статора; иротор, размещенный в статоре и включающий винтовой зуб, имеющий профиль, сформированный на наружной поверхности ротора, причемпо меньшей мере один из профилей винтового зуба ротора или винтового зуба статора выполнен асимметричным.2. Устройство по п. 1, в котором винтовой зуб статора включает первую сторону и вторую сторону, причем геометрия первой стороны отличается от геометрии второй стороны.3. Устройство по п. 1, в котором винтовой зуб ротора включает первую сторону и вторую сторону, причем геометрия первой стороны отличается от геометрии второй стороны.4. Устройство по п. 1, в котором статор включает асимметричный предварительно сформированный профиль.5. Устройство по п. 1, в котором винтовой зуб статора включает первую сторону и вторую сторону, причем угол наклона первой стороны относительно центральной линии, проходящей через ...

Rotary piston pump, particularly for delivery of fluids containing solid matter

The rotary pistons (30) are located on a support shaft (40) and are driven by a drive motor via a gear. Each piston has a displacement vane engaging in the intermediate spaces of the other piston. Each piston comprises a metallic core (33) and an elastomer material coating (32). With the rotation of the piston, the coating circulates in a sealed manner on the inside of the wall of the pump housing (20) and on the other rotary piston. The coating extends into the fixture area (37) of the rotary piston with the support shaft (40) and seals the transition area (36) between it and the metallic part of the rotary piston and also the metallic core (33) of the rotary piston and the support shaft against the delivered fluid medium.

Verfahren und Vorrichtung zum Herstellen von Pfeilgetrieberädern und Pumpen, die dieselben enthalten

Fluid conveying device e.g. double external low pressure gear pump for conveying hydraulic oil, has pair of gears exhibiting same axle distance and different gear geometries to provide different pressures and/or volumetric flows

The device (1) has two gear pumps (8, 9) comprising a pair of gears that comprise primary gear wheels. The primary gear wheels mesh with secondary gear wheels and are driven by a common drive shaft (6). The gears exhibit same axle distance and different gear geometries to provide different pressures and/or volumetric flows, where the gear geometries differ by number of teeth and gear width. The secondary gear wheels are arranged on a common rotational axis. A circular cylinder-shaped pump casing (4) comprises two radial suction openings (21, 22) and radial pressure ports.

Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen.

Zahnradpumpe

Zahnradpumpe, umfassend zwei Zahnräder (1, 2), deren Zähne (1a, 2a) unter Beibehaltung eines Nullspiels ineinander eingreifen und deren Zähne (1a, 2a) jeweils definiert sind durch eine Vorderflanke und eine Rückflanke, welche entlang einer Evolventenkurve ausgebildet sind, sowie jeweils einen Zahnkopf (10, 11), der durch den Verlauf der Flanken begrenzt ist, so dass sich in einem Grenzbereich zwischen den Flanken und dem Zahnkopf (10, 11) jeweils eine Kante ausbildet und der Zahnkopf (10, 11) zwischen den beiden an den Zahnkopf (10, 11) angrenzenden Kanten eine konstruktionsbedingte Zahnkopfdicke t0 aufweist, dadurch gekennzeichnet, dass im Grenzbereich zwischen dem Zahnkopf (10, 11) und der Rückflanke eine stetige Schnittfläche (S1, S2) angeordnet ist, so dass der Zahnkopf (10, 11) über eine Kante in die Schnittfläche (S1, S2) übergeht, und die Schnittfläche (S1, S2) die konstruktionsbedingte Zahnkopfdicke t0 derart verkürzt, dass eine Zahnkopfdicke t1 zwischen der Kante im Grenzbereich ...

Dickstoff- bzw. Guellepumpe

Displacement pump, particularly gear pump, has bypass channel, where suction side of pump is connected with pressure side of pump and is displaced around displacement path

The displacement pump has a bypass channel, where a suction side of the pump is connected with a pressure side of the pump and is displaced around a displacement path. The bypass channel opens to the suction side or to the pressure side with an increasing dimension in dependence of the displacement path.

ZAHNRADMOTOR

Zahnrad, Stirnradstufe sowie Verfahren zur Herstellung eines Zahnrads

Die Erfindung betrifft eine Stirnradstufe sowie ein Zahnrad (20) mit einer Mehrzahl von Zähnen (22), insbesondere ein Stirnrad mit einer Evolventenverzahnung, wobei die Zähne (22) in einer Axialrichtung des Zahnrads (20) eine durchgehende Erstreckung mit einem mittigen Verzahnungsabschnitt (30) aufweisen, wobei der mittige Verzahnungsabschnitt (30) zwischen äußeren Verzahnungsabschnitten (32, 34) angeordnet ist, wobei der mittige Verzahnungsabschnitt (30) bogenförmig ausgebildet ist, wobei die äußeren Verzahnungsabschnitte (32, 34) im Wesentlichen geradlinig verlaufen und schräg zu einer Mittenachse des Zahnrads (20) orientiert sind, und wobei die Zähne (22), wenn das Zahnrad (20) stirnseitig betrachtet wird, entlang ihrer Erstreckung in der Axialrichtung im Wesentlichen konstante Querschnittsprofile (68), insbesondere konstante Evolventenprofile, aufweisen. Die Erfindung betrifft ferner ein Verfahren zur Herstellung eines Zahnrads (20).

Zahnradpumpe mit Splinefunktion erzeugtem Zahnradprofil

Hydraulischer Fahrzeug-Schwingungsdämpfer mit einer Rotationskolbenmaschine

Die Erfindung betrifft einen hdraulischen Schwingungsdämpfer im Fahrwerk eines Fahrzeugs, dessen zwischen Arbeitskammern überströmendes Hydraulikmedium durch eine als Zahnringpumpe ausgebildete Rotationskolbenmaschine geführt ist, an welche ein als Motor oder Generator betreibbare Elektromaschine angekoppelt ist, wobei die Zähne des Innenzahnrades der Rotationskolbenmaschine und/oder des dieses umgebenden Zahnringes der Rotationskolbenmaschine in einer die Drehachse der Rotationskolbenmaschine enthaltenden Schnittebene betrachtet im Übergang von zumindest einer ihrer Seitenflanken zur dem jeweiligen Gegenstück, d. h. dem Zahnring oder dem Innenzahnrad zugewandten Oberfläche hin, zumindest bereichsweise fasenartig oder abgerundet gestaltet sind. Damit wird die Geräuschentwicklung erheblich reduziert.

Kugelzahnradpumpe

Sedimenthomogenisator für Exzenterschnecken-Tauchpumpen

Positive displacement gear pump for use in e.g. internal combustion (IC) engine, has pump case formed of material e.g. steel, whose coefficient of thermal expansion is lower than that of material e.g. zinc, for pair of gears

A gear pump (2) has a pair of gears (8,10) meshed together inside a pump case (4). The pump case is formed of a material e.g. steel, ceramic, whose coefficient of thermal expansion is lower than that of the material e.g. zinc alloy, zinc, light alloy, for each gear.

Rotorpumpe

Die Erfindung betrifft eine Rotorpumpe mit einem innenverzahnten Außenring und einem darin gelagerten und mit diesem kämmenden außenverzahnten Innenring, wobei der Außenring und der Innenring achsparallel zueinander angeordnet sind und die Achsen des Außenrings und des Innenrings einen Abstand zueinander aufweisen und der Außenring mit einem Hohlwellenmotor mit einem Wicklungen tragenden Stator und einem darin drehbar gelagerten Rotor verbunden ist, dadurch gekennzeichnet, dass der Außenring den Rotor des Hohlwellenmotors bildet.

Improvements in rotary pumps compressors or engines of the helical screw wheel type

... 705,795. Rotary compressors or engines. SVENSKA ROTOR MASKINER AKTIEBOLAG. April 22, 1952, No. 10077/52. Class 110 (2) A meshing-screw compressor or engine comprises male and female rotor teeth 20, 22, the profiles of the meshing parts being built up of a number of curves shown in the Figure relative to the pitch-circles M, F respectively. The major portion of the tooth 20 is outside the circle M and the lesser portion of the tooth 22 outside the circle F. The tooth 20 is constructed from radii R, R' struck from its pitch circle and completed by generated curves f, g. A minimum clearance is allowed between the curves a, a2 shown. The radius R' is struck from the pitch circle F. The tips of the teeth may be slightly flattened except for protruding strips 54, 56, 58, 60 which act as packing seals.

Gear pumps

... 1,128,051. Gear pumps. JOSEPH LUCAS (INDUSTRIES) Ltd. Aug.22, 1965 [May 24, 1965], No.21817/65. Heading F1F. To reduce the tendency towards cavitation in a gear pump having a pair of intermeshing gears 12, 13, Fig. 2, with teeth of involute form and inlet and outlet ports 18, 19 respectively, shown shaded, in an end face of the pump body 10, in one or both ends of the gears, there is a hole 20, Fig. 3, for each tooth, preferably at the root thereof, extending from the face of the tooth facing the inlet to the trailing edge of the tooth. This permits entry of liquid to a tooth space which is about to communicate with the inlet and assists filling of this space to eliminate vapour therefrom and thus reduce cavitation.

GEROTOR PUMPS

GEAR TYPE PUMPS

... 1,269,056. Gear pumps. H. E. MERRITT. June 30, 1969 [July 3, 1968J, No.31811/68. Heading F1F. In a gear pump having a pair of externallymeshing gear-wheels 3, 4 tooth wear is minimized by rendering the tooth profiles such that the path of contact 11 for the mating teeth has substantially the shape of a letter S, the part of the path that is concave relative to the centre O of the wheel 3 being shorter than the part that is concave relative to the centre Q of the wheel 4. The profiles of the teeth 9, 10 are conjugate and the diameter of the tip circles may be dissimilar or equal while the diameters of the pitch circles are equal or dissimilar accordingly. The profile of each flank of the teeth 9 may be an arc of a circle having a radius R and centre at a point S1, which when advanced by gear rotation to a point S2 is situated such that a line extending therefrom through the pitch point P cuts the path of contact at C. Two geometric constructions of said path are described with reference ...

Gerotor pumps

High efficiency gear pump

Automotive fuel pump gear assembly having lifting and Lubricating Features

A gerotor type automotive fuel pump having a gear assembly comprising a disc shaped inner gear 50 mating with a radially inner surface of outer annular gear 52. The gears are mounted between a pump body 22 and a pump cover 24. The inner gear has a centre aperture 62 defining a rotation axis perpendicular to its body faces and receiving a shaft arranged to enable the inner gear to axially float along the shaft. The inner gear cover side face 58 has a plurality of inner concave grooves 64 formed thereon and spaced apart from each other to provide lifting of the inner gear on the shaft when rotating about the axis to reduce wear and friction against the gear cover. The outer gear also has a plurality of outer concave grooves 78 on its cover side face 74 , also to provide lifting.

Rotary pump

The trochoid pump includes an outer gear rotor and an inner gear rotor, which are different in number of teeth from each other, pressure chambers defined by adjoining teeth of both rotors and an end plate. The pressure chamber volumes are increased or decreased in accordance with rotations of both rotors. An intake opening communicates with the pressure chambers whose volumes are gradually increasing, out of the pressure chamber and an outlet opening communicates with the pressure chambers whose volumes are gradually decreasing. A starting end of the intake opening starts to be opened at a minimum gap position or a neighborhood position thereof. The starting end of the intake opening can be opened at a position advanced through a rotary angle of 4 degrees in the rotating direction of both rotors from the minimum gap position.

Gerotor-type pump

Gerotor-type pump

The pump has an inner rotor bounded by an outer peripheral shape (20) which is generated by moving a first circle around a first trochoid. The inner rotor is mounted for rotation about a first axis. The pump also has an outer rotor mounted for rotation about a second axis which is off-set from the first axis. The outer rotor is bounded by an inner peripheral shape (22) which is generated by moving a second circle around a second trochoid. ...

Improvements in rotary pumps and compressors

... 927,295. Rotary pumps and compressors. SONIC ENGINEERING CORPORATION. Jan. 9, 1961 [Jan. 13, 1960], No. 845/61. Class 110 (2). A rotary pump or compressor comprising a pair of meshing rotary elements mounted for free axial movement on spaced-apart shafts, have between their side faces and the adjacent side faces of the casing in which the elements are housed annular sealing members preventing leakage of fluid across the faces of the elements. As shown in Fig. 2, spur gears 10, 12 mounted respectively on a splined shaft 44 and the smooth end 52 of a shaft 46 are each formed on their side faces inside the root circles, with annular grooves 74 mounting resilient sealing rings 80 of, e.g. polytetrafluorethylene or nylon which stand slightly proud of the grooves before assembly of the gears between end plates 24, 26. The sealing rings may be rectangular or round in cross-section. In a modification, radial grooves 74b, Fig. 6, extend from the annular groove 74 to mount a correspondingly shaped ...

Gear pump

A gear pump comprising a plurality of gear pairs 30, each pair having a respective input port and output port 34, and a connector device 36 to changeably select which output port(s) is connected to a base load fluid line and connect the other output port(s) to an additional load fluid line. Preferably the pairs are equally sized and are angularly spaced around a central connector device which is rotatably operable to changeably select the output ports. Preferably an indexing actuator operates the connector device and sequentially selects the output port(s) connected to the base load fluid line after each period of operation of the pump. Also claimed is an aero engine utilising the pump to pump fuel to a control arrangement which returns excess fuel received from the additional load fluid line back to the pump. By switching the output ports between the base load fuel line and the additional load fuel line intermittently, the gears wear at substantially the same rate and service life of the ...

Pump

Gear pump

Improvements relating to pumps

In a pump of the gerotor type comprising an outer rotor 3 with internal teeth or lobes 6 and an inner rotor 4 mounted eccentrically within the outer rotor and having external teeth or lobes 7, to prevent installation of either of the rotors the wrong way about in a pocket 1 in an internal-combustion engine 2 the teeth or lobes on both of the rotors are made asymmetric about radial planes containing the rotor axes and extending through the tips of the respective teeth or lobes, Fig. 2 (not shown). Additionally, the inner rotor may have an axial projection 8 which engages with an aperture in a stationary plate 9 and thus renders it impracticable to fit the inner rotor into the pocket the wrong way about. ...

Pumps with filling slots

PROCESS FOR THE MANUFACTURE OF CONVEYING SCREWS OF LONG SERVICE LFE AND HIGH RESISTANCE TO WEAR

... 1440333 Coating with metals by spraying EPITOGEPGYARTO VALLALAT 22 Nov 1973 [11 Dec 1972] 54226/73 Heading C7F A conveyor screw is plasma or flame sprayed with (wt. per cent) 0À4 C, 16 Cr, 4B, 4 Si, 3 Fe, 2À5 Cu, 2À5 Mo, 2À5 W, balance Ni. The screw is cleaned, heated to 160 to 200‹C, and a coating of 50 to 100 microns sprayed whilst it is rotated, the coating is then heated to 1100 to 1250‹C, and an intermediate layer of 0À2 to 2mm. applied in thickness steps of 0À2 to 0À25 mm., then after cooling at a rate less than 5 to 10‹C per minute, a top layer of 50 to 100 microns is applied at a temperature of 160 to 200‹C, and the screw is finally cooled at less than 5 to 10‹C per minute.

Improvements in or relating to endless screw pumps

... 431,983. Screw pumps. HOUTTUIN, C., 154, Keulsehekade, Utrecht, Holland. Sept. 25, 1934, No. 27518. Convention date, Sept. 25, 1933. [Class 110 (ii)] In a pump having a screw rotor 2 which meshes with another screw or rotary abutment, such as a toothed wheel 3, the inlet orifice to the threads is enlarged by cutting off the end 8 (shown dotted) to a new plane 9, scooping out part of a flank of the next thread, or a combination of these. The various edges are rounded off to prevent eddying of the fluid being pumped.

Gear Pumps

... 1,170,773. Gear pumps. JOSEPH LUCAS (INDUSTRIES) Ltd. March 8, 1967 [March 23, 1966], No.12801/66. Heading F1F. In a gear pump having a pair of externally meshing gears the teeth of both gears are asymmetrical and have involute operating faces. The asymmetry occurs due to relieving the teeth on their inoperative faces as compared with a symmetrical involute tooth. The inoperative faces extend uniformly throughout the axial lengths of the gears and may also be of involute shape. The relieved portions of the teeth prevents the build up of hydraulic pressure in the space between two pairs of successive meshing teeth and thus reduces tooth wear.

Adjustable displacement gear pump

... 381,148. Rotary pumps. SVENSON, E. J., 301, South Water Street, Rockford, Illinois, U.S.A. March 20, 1931, No. 8685. [Class 110 (ii).] In a rotary pump comprising intermeshing toothed drums 20, 22, the latter drum is formed with two series of radial passages 58, 58a for the escape of fluid trapped between the meshing teeth, the passages communicating with a central bore in which is arranged a valve capable of adjustment to such a position that the whole of the trapped fluid is delivered either to the high-pressure side 66 of the pump or to a point external of the pump casing. Fig. 3 shows a valve 42, rotatable by a lever from outside the casing and having a transverse port 44 adapted to register with a number of the passages 58, 58a, the valve being shown in the position in which the whole of the trapped fluid is delivered to the high-pressure chamber 66 ; by rotating the valve in an anticlockwise direction, the displacement of the pump is progressively reduced owing to the establishment ...

A pump assembly

Oil pump for an aged engine

An oil pump for an engine is disclosed. The oil pump may include a first pump mechanism configured to supply oil to a main lubrication gallery of the engine, and a second pump mechanism configured to supply oil to a piston cooling gallery of the engine. The first pump mechanism may be designed for a first type of engine and the second pump mechanism may be designed for a second type of engine. The first type of engine may have a greater quantity of cylinders than the second type of engine.

SCREW PUMP FOR PROMOTING A FLOW MEDIUM

INTERIOR GEAR PUMP WITH RECESSES AT THE GEAR WHEEL STORAGE SPACES

GEROTORMECHANISMUS FOR A HYDRAULIC SCREW MACHINE

HYDROSTATIC GEAR WHEEL MACHINE WITH A TROCHOIDENZAHNRADPAAR

SCREW PUMP

ROTATIONSKOLBENPUMPE, INSBESONDERE ZAHNRADPUMPE

ROOTS BLOWER PUMP

GEAR WHEEL MACHINE

ROTARY PISTON PUMP, IN PARTICULAR GEAR PUMP

INTERIOR GEAR PUMP.

GEROTORPUMPEN.

SNAIL FOR AN ECCENTRIC SPIRAL PUMP OR A UNTERTAGEBOHRMOTOR

GEAR WHEEL EXTRUSION

INTERIOR GEAR PUMP GEROTORBAUART

SNAIL CONVEYER SYSTEM FOR LIQUIDS AND/OR MATERIAL BREAKING INTO

GEAR WHEEL FROM PLASTIC FOR A GEAR PUMP

Hydraulic gear wheel machine

Gear pump

Enhancement of surface-active solid-phase heterogeneous catalysts

ROTOR FOR A ROTARY MACHINE

Horizontal and vertical well fluid pumping system

A pump system for producing fluids from a reservoir using a wellbore having a vertical section with a casing defining an annulus, a transitional section and a horizontal section, and a production tubing having a vertical section and a horizontal section, wherein the system includes a completion with an isolation device in the annulus near the bottom of the vertical section, a gas/liquid separator for receiving produced fluids from the horizontal section, and a vertical lift pump; a continuous flow path from the terminus of the production tubing to the vertical section; a plurality of horizontal pumps in the horizontal section, each having an intake exposed to the reservoir and an outlet in the continuous flow path. The horizontal length of the production tubing is closed to the reservoir except through the horizontal pumps. A method of producing fluids includes isolating a vertical section of a wellbore from a horizontal section; isolating the production tubing from the reservoir; pumping ...

ROTOR FOR ROTARY PUMP

Progressive cavity motors using composite materials

COMBINATION HELICAL ROTOR PUMP

GEARED PUMP

A gear pump is disclosed wherein delivery rate pulsations and consequent pressure pulsations are compensated for by providing recesses of variable cross-section in either the gear faces or on a face of the housing in the zone of the line of contact of the gear teeth. The leakage through the recesses is variable and compensates for the delivery rate pulsations.

MODULAR THRUST-COMPENSATING ROTOR ASSEMBLY

A modular rotor assembly for a screw pump including a power rotor and an idler rotor having respective first ends adapted to be disposed in a suction side of the screw pump and respective second ends adapted to be disposed in a discharge side of the screw pump, the power rotor including a balance piston adapted to be disposed within a pump housing of the screw pump with a radial clearance between an entire circumference of the balance piston and the pump housing is in a range between 1 micron and 200 microns, wherein the power rotor is provided with a tapered bearing surface configured to define a wedge- shaped, radial gap axially intermediate the power rotor and the idler rotor.

MODULAR THRUST-COMPENSATING ROTOR ASSEMBLY

A modular rotor assembly for a screw pump including a power rotor and an idler rotor having respective first ends adapted to be disposed in a suction side of the screw pump and respective second ends adapted to be disposed in a discharge side of the screw pump, the power rotor including a balance piston adapted to be disposed within a pump housing of the screw pump with a radial clearance between an entire circumference of the balance piston and the pump housing is in a range between 1 micron and 200 microns, wherein the power rotor is provided with a tapered bearing surface configured to define a wedge- shaped, radial gap axially intermediate the power rotor and the idler rotor.

PLASTICIZING DELIVERY METHOD AND DEVICE USING ECCENTRIC ROTOR AND HAVING PULSED VOLUME DEFORMATION

The present invention relates to a plasticizing delivery method and device using an eccentric rotor and having pulsed volume deformation. The rotation of the eccentric rotor and the rolling of the rotor in the inner cavity of a stator during constant reverse revolutions cause the volume of the material between the eccentric rotor and the stator to periodically change alternatingly along the axial direction and the radial direction of the stator, thereby enabling the plasticizing delivery of the material having pulsed volume deformation. The plasticizing delivery device having pulsed volume deformation consists of a stator, of which the inner cavity comprises multiple alternatingly disposed spiral segments and straight segments, and an eccentric rotor comprising multiple alternatingly disposed eccentric spiral segments and eccentric straight segments. The eccentric rotor is disposed in the inner cavity of the stator. The eccentric spiral segments and the eccentric straight segments of the ...

EXTERNAL GEAR PUMP INTEGRATED WITH TWO INDEPENDENTLY DRIVEN PRIME MOVERS

A pump includes a casing defining an interior volume. The pump casing includes at least one balancing plate that can be part of a wall of the pump casing with each balancing plate including a protruding portion having two recesses. Each recess is configured to accept one end of a fluid driver. The balancing plate aligns the fluid displacement members with respect to each other such that the fluid displacement members can pump the fluid when rotated. The balancing plates can include cooling grooves connecting the respective recesses. The cooling grooves ensure that some of the liquid being transferred in the internal volume is directed to bearings disposed in the recesses as the fluid drivers rotate.

HORIZONTAL AND VERTICAL WELL FLUID PUMPING SYSTEM

A pump system for producing fluids from a reservoir using a wellbore having a vertical section with a casing defining an annulus, a transitional section and a horizontal section, and a production tubing having a vertical section and a horizontal section, wherein the system includes a completion with an isolation device in the annulus near the bottom of the vertical section, a gas/liquid separator for receiving produced fluids from the horizontal section, and a vertical lift pump; a continuous flow path from the terminus of the production tubing to the vertical section; a plurality of horizontal pumps in the horizontal section, each having an intake exposed to the reservoir and an outlet in the continuous flow path. The horizontal length of the production tubing is closed to the reservoir except through the horizontal pumps. A method of producing fluids includes isolating a vertical section of a wellbore from a horizontal section; isolating the production tubing from the reservoir; pumping ...

POSITIVE DISPLACEMENT PUMPS

Improvements in screw pumps, and especially positive displacement pumps, are disclosed. The clearance between the screw flight and the bore is increased over an increased period. The screw is balanced at preferred locations on the flight. Wear hard material such as tungsten carbide is emplaced on a portion of the outer surface of the screw flight. A wear measurement port extends from the outside surface of the pump to the inner surface of the bore. Pressure regulating ports and controls provide an active pressure feedback control system to control the feeding of pressure from the outlet end of the screw back toward the inlet end of the screw. Pump wear, and pressure pulsations in the operation of the pump are thus reduced. The wear measurement port enables a method of monitoring wear on the pump screw during operation without disassembling the pump, namely by manipulating a wear measurement device through the port. The wear measurement device can be a proximity sensor which can be connected ...

CRESCENT GEAR PUMP WITH HYPO CYCLOIDAL AND EPI CYCLOIDAL TOOTH SHAPES

A crescent pump gear including: a housing having a chamber communicating with an intake port and a discharge port; a shaft journaled for rotation within said chamber; an externally toothed inner gear mounted centrally on said shaft about a first axis; an internally toothed annular gear eccentrically mounted for rotational engagement with said inner gear about a second axis; a crescent contacting a portion of said inner and outer gears; said inner gear has a dual cycloidal tooth profile generated about a first generating circle and said outer gear has a dual cycloidal tooth profile generated about a second generating circle.

Zahnradpumpe.

Pompe à vis.

Zahnradpumpe.

Maischepumpe.

Zahnradpumpe.

Zahnradmotor.

Kapselwerk für Flüssigkeiten, plastische Massen und dergleichen.

Pompe à engrenages.

Drehkolben für Gebläse, Gasmesser, Pumpen oder dergleichen

Zahnrad-Verdrängungsmaschine

Verfahren und Vorrichtung zum Mischen und Homogenisieren von Flüssigkeiten verschiedener Viskosität

Hydraulische Zahnradmaschine

Drehkolbenpumpe für zähflüssige Medien

Rotationskolbenmaschine für Flüssigkeiten

Pompe hydraulique à pistons rotatifs

Hohlzylinderrotor

Pumpe

Rotor für Innenläufer-Zahnradpumpen

Zahnradpumpe

Drehkolbenpumpe zum Fördern zähflüssiger Medien

Zahnradpumpe, insbesondere für Wurstbrät

Drehkolbenpumpe zum Fördern zähnflüssiger Medien

Gear root geometry for increased carryover volume

A gear includes a gear root defined by a stretched root blended into an involute tooth profile curve within a True Involute Form diameter.

Fluid Energy Transfer Device

A rotary chambered fluid energy-transfer device includes a housing with a central portion having a bore formed therein and an end plate forming an arcuate inlet passage, with a radial height and a circumferential extent. The device also includes an outer rotor rotatable in the central portion bore with a female gear profile formed in a radial portion defining a plurality of roots and an inner rotor with a male gear profile defining a plurality of lobes in operative engagement with the outer rotor. A minimum radial distance between an outer rotor root and a corresponding inner rotor lobe define a duct end face proximate the end plate, wherein the duct end face has a radial height substantially equivalent to the inlet passage radial height at a leading edge of the inlet passage.

METHOD FOR PRODUCING THE TOOTH SHAPE OF THE INNER AND OUTER RING OF AN ANNULAR GEAR MACHINE AND TOOTHED RING PRODUCED BY MEANS OF SAID METHOD

In producing tooth shapes of two toothed rings of an annular gear machine, a starting geometry of a first toothed ring, at least one quality criterion of the annular gear machine, and a desired eccentricity between rotational axes of the two toothed rings are defined. A motion is performed with the starting geometry that performs a rotational motion about its rotational axis and a revolving motion about the rotational axis of the second toothed ring. The rotational and revolving motions are coupled so the rotational angle of the eccentricity equals the product of the rotational angle and tooth count of the first toothed ring. A tooth shape contour of the second toothed ring is generated by recording the path described by the envelope of the starting geometry. If the defined quality criterion is not met, the previously used starting geometry and/or the defined eccentricity is changed and steps are repeated. 1. A method for forming the tooth shape of a first and a second annular gear of an annular gear machine , comprising the following steps:a) establishing a starting geometry of the first annular gear, the inner or outer ring of the annular gear machine, at least one quality criterion of the annular gear machine as well as a desired eccentricity (e) between the rotation axes (A, B) of the two annular gears;b) performing a movement with the starting geometry established, wherein the starting geometry performs a rotational movement about its own rotational axis (B) and at the same time a revolving movement about the rotational axis (A) of the second annular gear, and wherein this rotational movement and this revolving movement are interrelated such that the angle of rotation (b) of the eccentricity (e) is continuously equal to the product of the angle of rotation (a) of the first annular gear and the number of teeth (Z) of the first annular gear (b=a×Z);c) generating the tooth shape contour of the second annular gear by plotting the path described by the envelope ...

MULTI-CLUSTER GEAR DEVICE

A multi-cluster gear device operable to function as a pump, a motor or operable to alternate between a pump and a motor. 1. A multi cluster gear device comprising:a shaft rotatable about a longitudinal axis;a primary gear mounted on the shaft;at least two secondary gears spaced about and positioned to engage with the primary gear;each of the at least two secondary gears configured to independently receive fluid from a fluid reservoir and to allow flow of a portion of the fluid about the secondary gear and to allow the remaining portion of the fluid to be carried by the primary gear to the adjacent secondary gear.2. A multi cluster gear device comprising:a primary gear;at least two secondary gears spaced about and positioned to engage with the primary gear;each of the at least two secondary gears configured to independently receive fluid from a fluid reservoir and to allow flow of a portion of the fluid about the secondary gear and to allow the remaining portion of the fluid to be carried by the primary gear to the adjacent secondary gear.3. The multi cluster gear device according to claim 2 , wherein the at least two secondary gears are smaller than the primary gear.4. The multi cluster gear device according to claim 2 , wherein the at least two secondary gears are spaced evenly about the periphery of the primary gear.5. The multi cluster gear device according to claim 2 , wherein approximately 50% of the fluid received by each of the at least two secondary gears flows around respective secondary gears and the remaining fluid portion is carried to the adjacent secondary gear.6. The multi cluster gear device according to claim 2 , wherein the each of the secondary gears discharges approximately half of the total volume of fluid received claim 2 , such that each of the secondary gears is associated with an input port and an output port claim 2 , providing for a pair of ports per said each of the secondary gears.7. The multi cluster gear device according to claim 6 , ...

Polyetherimide pump

A positive displacement pump and methods of making a positive displacement pump having a component, the component having a density ranging from more than 0 to 3 g/cm 3 , a glass transition temperature (Tg) greater than or equal to 150° C., and a yield strength retention greater than 90% after soaking in engine oil for 7 days at 150° C.

ROTOR FOR PUMP

The present invention relates to a rotor for a vacuum pump having a roots pumping mechanism, the rotor comprising at least two hollow lobes, each lobe having an outer wall which defines a lobe profile, a hollow cavity generally inward of the outer wall, and at least one strengthening rib located in the cavity to resist stress on the lobes generated during rotation. 1. A vacuum pump rotor for use in a vacuum pump having a roots pumping mechanism , the rotor comprising at least two hollow lobes , each respective hollow lobe comprising:a respective outer wall which defines a lobe profile,a respective hollow cavity generally inward of the respective outer wall, andat least one respective strengthening rib located in the respective hollow cavity to resist stress on the respective hollow lobe generated during rotation.2. The rotor of claim 1 , wherein the at least one respective strengthening rib extends around an interior wall of the respective hollow lobe.3. The rotor of claim 1 , wherein the at least one respective strengthening rib has a varying extent and is distributed within the respective hollow cavity dependent on the varying stresses applied to the respective hollow lobe in use.4. The rotor of claim 1 , wherein the respective outer wall has a varying thickness and is thicker at a radially inner portion than at a lobe tip.5. The rotor of claim 1 , wherein the respective outer wall defines a thickness such that the respective hollow lobe deforms under centrifugal loading when the rotor is rotated in use and the deformation is greater than manufacturing tolerances.6. The rotor of claim 5 , wherein the respective hollow lobe defines a first configuration in a first condition in which the rotor is rotated in use and a second condition when the rotor is not rotated and the respective hollow lobe is not in the first configuration claim 5 , and wherein the respective hollow lobe deforms from the second condition to the first condition when tip speed of the respective ...

INTERNAL GEAR PUMP

An internal gear pump includes a pinion, a ring arranged around the pinion, and a cylindrical wall arranged around the ring. A support element, on which the pinion and the ring are supported, carries high-pressure liquid towards a recess located at the junction between the ring and the cylindrical wall, and also carries low-pressure liquid towards another recess located at another point of the junction between the ring and the cylindrical wall. The recess allows the load of the ring on the cylindrical wall to be reduced. 1. An internal gear pump comprising:a pinion capable of rotating about a first axis of rotation;a ring arranged around the pinion, having a cylindrical periphery and being configured to rotate about a second axis of rotation that is different to the first axis of rotation and parallel thereto, the pinion and the ring being arranged to delimit a work space comprising a high-pressure space and a low-pressure space;a first support element arranged on a first side of the ring to limit the movement thereof in a first sense along a first orientation that is substantially parallel to the first and second axes of rotation;a second support element arranged on a second side of the ring to limit the movement thereof in a second sense that is opposite the first sense and in the first orientation;a cylindrical wall arranged around the ring to limit the movement thereof in a plane that is substantially perpendicular to the second axis of rotation;a first high-pressure recess in an arc of a circle and in fluid contact with a first portion of the cylindrical periphery of the ring;a first low-pressure recess in an arc of a circle and in fluid contact with a second portion of the cylindrical periphery of the ring, the first high-pressure recess and the first low-pressure recess being separated;a first high-pressure conveying means forming a fluid connection between the high-pressure space and the first high-pressure recess; anda first low-pressure conveying means ...

HYDRAULIC MOTOR SUBASSEMBLY KIT WITH CARRIER

A carrier for a motor subassembly of a hydraulic motor is provided that enables multiple components of the motor subassembly to be temporarily bundled into a compact and easy-to-transport motor subassembly kit. The carrier is a non-hydraulically-functioning member that is configured to have one or more features that mimic a corresponding one or more features of a hydraulically-functioning motor housing to which motor subassembly is intended to be coupled for forming the hydraulic motor. The carrier may have a body with a recessed portion that is configured to receive and/or enclose one or more components of the motor subassembly, and which may cooperate with the one or more motor subassembly components to temporarily secure and bundle the motor subassembly as a compact kit, thereby facilitating transportation and handling of the subassembly components. 1. A motor subassembly kit for a hydraulic motor , the kit comprising:a hydraulically-operable motor subassembly having a plurality of motor components that are configured to be operably coupled to a hydraulically-operable motor housing for at least partially forming the hydraulic motor; anda non-hydraulically-operable carrier for carrying the motor subassembly;wherein the carrier cooperates with the motor subassembly to temporarily secure the plurality of motor components of the motor subassembly as a transportable bundle, andwherein the carrier has one or more portions that mimic a corresponding one or more portions of the hydraulically-operable motor housing, thereby facilitating transportation of the plurality of motor components in the transportable bundle.2. The motor subassembly kit according to claim 1 , wherein the carrier includes a body having a nose portion claim 1 , a base portion claim 1 , and an intermediate portion extending between the nose portion and the base portion;wherein the carrier has an opening in the base portion for receiving one or more of the plurality of motor components, andwherein the ...

ROTARY LOBE PUMP WITH INTERNAL BEARING

A rotary lobe pump having a pump housing with a pump room, an inlet opening and an outlet opening, a first multi-lobe rotary piston, which is arranged in the pump room and is rotatably mounted about a first axis of rotation, a second multi-lobe rotary piston, which is arranged in the pump room and is rotatably mounted about a second axis of rotation spaced apart from the first axis of rotation and meshingly engages in the first rotary piston, wherein the first and second rotary pistons are drivable in opposite directions and are designed to generate a flow of a conveyed medium from the inlet opening through the pump room to the outlet opening by counter-rotation about the first and second axis of rotation, respectively, and a drive device, which is mechanically coupled to the rotary pistons for driving the rotary pistons. 124-. (canceled)25. A rotary lobe pump for conveying a particle-laden conveyed medium , comprising:a pump housing with a pump room;an inlet opening and an outlet opening;a first, multi-lobe rotary piston, which is arranged in the pump room and is rotatably mounted about a first axis of rotation;a second multi-lobe rotary piston, which is arranged in the pump room, and is rotatably mounted about a second axis of rotation spaced apart from the first axis of rotation and meshingly engages in the first rotary piston;wherein the first and the second rotary pistons are drivable in opposite directions and are designed to generate a flow of the conveyed medium from the inlet opening through the pump room to the outlet opening by counter-rotation about the first and second axis of rotation, respectively;a drive device arranged on one side of the pump housing, which is mechanically coupled to the rotary pistons for driving the rotary pistons;a first fixed axle body, which is arranged inside the first rotary piston and connected to the pump housing on the side of the drive device; andat least one first bearing for rotatably supporting the first rotary piston ...

DUAL-STAGE GEAR PUMP WITH REDUCED PRESSURE RIPPLE

A fuel system includes a fuel gathering system in fluid communication with a fuel storage container, and a fluid pump assembly in fluid communication with the fuel gathering system. The fluid pump assembly includes a main gear pump stage and a first flow attenuator. A main driven gear is meshed with a main drive gear in a main pump conduit, and a main pump bearing assembly rotatably supports the main drive gear and the main driven gear. The first flow attenuator is disposed around the main pump conduit, and includes a substantially polygonal fluid opening. Edges of the opening are substantially aligned with an undercut bearing portion on at least one of an inlet side and an outlet side of the main pump conduit to define a non-round fluid boundary. 1. A fuel system comprising:a fuel storage container;a fuel gathering system in fluid communication with the fuel storage container; and a main gear pump stage including a main driven gear meshed with a main drive gear in a main pump conduit, and a main pump bearing assembly rotatably supporting the main drive gear and the main driven gear; and', 'a first flow attenuator disposed around the main pump conduit, the first flow attenuator including a substantially polygonal fluid opening having edges substantially aligned with an undercut bearing portion on at least one of an inlet side and an outlet side of the main pump conduit to define a non-round fluid boundary., 'a fluid pump assembly in fluid communication with the fuel gathering system, the fluid pump assembly comprising2. The fuel system of claim 1 , wherein the fuel storage container comprises:a plurality of wing-mounted fuel tanks.3. The fuel system of claim 1 , further comprising:a heat exchanger disposed upstream of the dual-stage fuel pump assembly;wherein the heat exchanger is in selective thermal communication with engine oil flowing through an engine thermal management system.4. The fuel system of claim 1 , wherein the fluid pump assembly is a dual-stage fuel ...

OIL DELIVERY SYSTEM FOR THE LUBRICATION OF A CHAINSAW

The disclosure provides a method of oil delivery to a chainsaw chain blade using a gerotor pump in sequence with flow control valves to provide lubrication to the chain blade to reduce friction with the chainsaw bar guide and prevent overheating and damage to the chain blade or guide bar. 1. A fluid lubrication system , which comprises:a fluid reservoir;a gerotor pump; anda system of fluid feed lines, wherein the fluid feed lines establish fluid communication between the fluid reservoir, the gerotor pump and a point of application, and wherein the gerotor pump is configured to pump a fluid from the fluid reservoir, through the system of fluid feed lines and to the point of application.2. The fluid lubrication system described in including one or more valves intervening between one or more of the gerotor pump claim 1 , the fluid reservoir and the point of application claim 1 , including but not limited to one or more of a gate valve claim 1 , a pressure relief valve and a venturi valve.3. The fluid lubrication system of claim 1 , wherein the gerotor pump comprises:a pump housing, having a fluid inlet port and a fluid outlet port;a gerotor pump motor, having a motor rod that extends from the motor into the pump housing;an inner gerotor gear, having n number of gear teeth, wherein the inner gerotor gear is secured to the motor rod, such that it will spin with the motor rod;{'b': '1', 'an outer gerotor gear, having n+ number of gear notches, wherein the inner gerotor gear is positioned within the outer gerotor gear, such that it will transfer the spinning motion of the motor rod to the outer gerotor gear;'}one or more fluid pocket recesses formed by the pump housing and configured to one or more of increase the size of fluid enclosures created by the spinning gerotor gears and deliver lubrication between the gerotor gears and the pump housing;a fluid-tight seal positioned around the inner and outer gerotor gears inside the pump housing.4. The fluid lubrication system of ...

BI-HELICAL TOOTHED WHEEL WITH VARIABLE HELIX ANGLE AND NON-ENCAPSULATING TOOTH PROFILE FOR HYDRAULIC GEAR APPARATUSES

The invention relates to a bi-helical toothed wheel () with non-encapsulating profile () for hydraulic gear apparatuses (), of the type bound to a support shaft () to form a driving or driven wheel of said hydraulic apparatus and comprising a plurality of teeth () extended with variable helix angle with continuous function in the longitudinal direction, wherein the teeth profile () keeps a shape continuity in each cross section thereof. More particularly, each tooth of the toothed wheel is longitudinally split in three zones: initial (A), central (B) and terminal (C) zones, and the central zone (B) has a variable helix angle, while the initial (A) and terminal (c) zones have a constant helix angle. The invention allows to manufacture contra-rotating rotors, having a non-encapsulating profile and a helix shape such as to suppress the angular point at the center of the rotors themselves and therefore all the problems related to their machining. 1. A bi-helical toothed wheel with non-encapsulating profile for hydraulic gear apparatuses , said bi-helical toothed wheel being bound to a support shaft to form a driving or driven wheel of said hydraulic apparatus and comprising a plurality of teeth extended with variable helix angle with continuous function in the longitudinal or axial tooth direction , wherein the teeth profile keeps a shape continuity in each cross section thereof.2. A toothed wheel according to claim 1 , wherein each tooth is longitudinally split in three zones: initial claim 1 , central and terminal zones claim 1 , where the initial and terminal zones have a symmetrical helix angle.3. A toothed wheel according to claim 1 , wherein the helix angle of the tooth is variable over the whole gear length.4. A toothed wheel according to claim 1 , wherein each cross section coincides with the front profile of the toothed wheel.5. A toothed wheel according to claim 1 , wherein the helix development has a transition point between a right-handed portion and a left- ...

SPROCKET GEROTOR PUMP

A sprocket gerotor pump includes an outer gerotor gear configured to rotate about a first axis. The outer gerotor gear includes an outer gear body including a plurality of internal gear teeth extending from the outer gear body toward the first axis. The sprocket gerotor pump includes an inner gerotor gear configured to rotate about a second axis. The inner gerotor gear includes an inner gear body and a plurality of external gear teeth extending from the inner gerotor gear away from the second axis. The external gear teeth mesh with the internal gear teeth. Rotating the outer gerotor gear causes rotation of the inner gerotor gear. The sprocket gerotor pump further includes a sprocket integrally coupled with the outer gerotor gear such that the sprocket and the outer gerotor gear collectively form a one-piece structure. The sprocket is driven by a chain. 1. A sprocket gerotor pump , comprising:an outer gerotor gear configured to rotate about a first axis, wherein the outer gerotor gear includes an outer gear body including a plurality of internal gear teeth extending from the outer gear body toward the first axis;an inner gerotor gear configured to rotate about a second axis, wherein the second axis is spaced apart from the first axis, the inner gerotor gear includes an inner gear body and a plurality of external gear teeth extending from the inner gear body away from the second axis, and the plurality of external gear teeth meshes with the plurality of the internal gear teeth such that rotation of the outer gerotor gear causes rotation of the inner gerotor gear; anda sprocket integrally coupled with the outer gerotor gear such that the sprocket and the outer gerotor gear collectively form a one-piece structure.2. The sprocket gerotor pump of claim 1 , wherein the sprocket includes a ring and a plurality of external sprocket teeth extending from the ring.3. The sprocket gerotor pump of claim 2 , wherein the ring is directly coupled to the outer gear body claim 2 , the ...

OIL PUMP

An oil pump which changes an amount of fluid transferred from an intake port to a discharge port in one rotation, by causing a rotation of a reference line linking centers of rotation of an inner rotor and an outer rotor, the oil pump including a pump housing in which a first partitioning section is formed between a trailing end section of the intake port and a leading end section of the discharge port, and a second partitioning section is formed between a trailing end section of the discharge port and a leading end section of the intake port. A width dimension of the second partitioning section is formed to be the same as or larger than a formation range of a space between teeth which is constituted by the inner rotor and the outer rotor passing the second partitioning section during a low-speed rotation. 1. An oil pump which changes an amount of fluid transferred from an intake port to a discharge port in one rotation , by causing a rotation of a reference line linking centers of rotation of an inner rotor and an outer rotor , the oil pump comprising:a pump housing in which a first partitioning section is formed between a trailing end section of the intake port and a leading end section of the discharge port, and a second partitioning section is formed between a trailing end section of the discharge port and a leading end section of the intake port,wherein the reference line passes through respective central positions of the first partitioning section and the second partitioning section in a width direction during a low-speed rotation,wherein the reference line rotates in a direction opposite to a direction of rotation of the inner rotor and the outer rotor, and passes through rear sides, in terms of the direction of rotation, of the respective central positions of the first partitioning section and the second partitioning section in the width direction during a high-speed rotation,wherein a width dimension of the second partitioning section is formed to be the ...

GEAR PUMP BEARINGS WITH HYBRID PADS

A journal bearing assembly includes a first journal bearing disposed about a longitudinal end of a gear shaft and spaced a first distance from a first axial gear face. A first fluid film location and a first hybrid pad location are annularly between an inner surface of the first journal bearing and an outer surface of the gear shaft. The first hybrid pad location circumferentially adjacent to the first fluid film location has a minimum leading edge angular location of at least about 31.0° measured relative to a first bearing flat. A first porting path provides high pressure fluid communication from a location outside the first journal bearing to the first fluid film location at or adjacent to the first hybrid pad location. 1. A journal bearing assembly comprising:a gear shaft;a gear mounted to the gear shaft, the gear including a first axial gear face;a first journal bearing disposed about a longitudinal end of the gear shaft and spaced a first distance from the first axial gear face;a first fluid film location annularly between an inner surface of the first journal bearing and an outer surface of the gear shaft;a first hybrid pad location circumferentially adjacent to the first fluid film location, the first hybrid pad location having a minimum leading edge angular location of at least about 31.0° measured relative to a first bearing flat; anda first porting path through a body of the first journal bearing providing high pressure fluid communication from a location outside the first journal bearing to the first fluid film location at or adjacent to the first hybrid pad location.2. The journal bearing assembly of claim 1 , wherein the first porting path comprises:a discharge face cut into an outer surface of the first journal bearing for receiving the high pressure fluid;a radial spool cut into the first journal bearing;an axial hole through the first journal bearing for communicating the high pressure fluid from the discharge face cut to the radial spool cut; anda ...

Apparatus for Reducing Noise of Gear Pump Through Uneven Pitch-Simulated Control and Method Thereof

An apparatus for reducing noise of a gear pump through uneven pitch-simulated control includes a calculation unit to calculate different control current values for each tooth of a teeth order by applying a teeth number, the teeth order, and a teeth angle of the gear pump in which a plurality of teeth are evenly formed, a storage unit to map and store the teeth order and the different control current values corresponding to the teeth order for each tooth, and a current controller to variably generate the control current value mapped corresponding to the teeth order when each tooth reaches a reference position when the gear pump rotates by a motor, wherein the control current value is added to a reference current value of a motor control signal and applied to the motor. 1. An apparatus for reducing noise of a gear pump through uneven pitch-simulated control , the apparatus comprising:a calculation unit configured to calculate different control current values for each tooth of a teeth order by applying a teeth number, the teeth order, and a teeth angle of the gear pump in which a plurality of teeth are evenly formed to a predetermined function;a storage unit configured to map and store the teeth order and the different control current values corresponding to the teeth order for each tooth; anda current controller configured to variably generate the control current value mapped corresponding to the teeth order when each tooth reaches a reference position when the gear pump rotates by a motor, wherein the control current value is added to a reference current value of a motor control signal and applied to the motor.2. The apparatus of claim 1 , wherein the current controller is configured to:instantaneously generate the control current value mapped with the tooth corresponding to the teeth order at a time when the tooth corresponding to the teeth order reaches the reference position; andapply only the reference current value to the motor during a remaining time when the ...

DEMAND FUEL SYSTEMS FOR TURBOMACHINES

A fuel system for a turbomachine includes a fuel tank and a first fuel line in fluid communication with the fuel tank and one or more fuel injectors. The first fuel line includes a main fuel pump disposed on the first fuel line, and an electric metering system disposed on the first fuel line downstream of the main fuel pump configured for starting the turbomachine and metering fuel to the fuel injectors. 1. A method for pumping fuel to a turbomachine , comprising:using an electric metering system to meter fuel to one or more fuel injectors of the turbomachine.2. The method of claim 1 , wherein the electric metering system is an electric pump configured to start the turbomachine and to meter fuel to the fuel injectors.3. The method of claim 1 , further comprising pumping fuel to the electric metering system using a mechanical vapor core fuel pump.4. The method of claim 1 , wherein the electric metering system includes a separate electric starter pump and a controllable metering valve.5. The method of claim 3 , further comprising flowing fuel to a fuel/oil cooler disposed downstream of the mechanical vapor core pump and the electric metering system.6. The method of claim 5 , wherein the fuel-oil cooler is between the electric metering system and the one or more fuel injectors.7. A method for not returning fuel to a fuel tank in a turbomachine to reduce heat addition to on-board fuel claim 5 , comprising:metering fuel to one or more fuel injectors of a turbomachine using an electric metering system to continuously pump only required fuel to the fuel injectors and thereby eliminating a need to return fuel to the fuel tank.8. The method of claim 7 , wherein the electric metering system is an electric pump configured to start the turbomachine and to meter fuel to the fuel injectors.9. The method of claim 7 , further comprising pumping fuel to the electric metering system using a mechanical vapor core fuel pump.10. The method of claim 7 , wherein the electric metering ...

Positive Displacement Pump With Shaft-Mounted Sleeve

A rotary positive displacement pump comprising a pair of forwardly-positioned sealing arrangements and a pair of forwardly-positioned sleeves are received within a cavity providing for easy maintenance of the pump when the seals need to serviced. Each of the sealing arrangement includes a dynamic seal and a static seal. The dynamic seal is positioned forward of the static seal and abuts a corresponding sleeve and hub. 1. A rotary positive displacement pump for pumping a pumped product , the rotary positive displacement pump comprising:a gear case including a pair of shafts extending therefrom at a forward end;a pump body supported by the gear case on the forward end of the gear case, the pump body having a cover attached thereto so as to define a cavity between the pump body and the cover in which the cavity has an inlet and an outlet, the pump body having a pair of hubs that extend into the cavity in which each of the pair of hubs has an axially-extending opening through each one of which a corresponding one of the pair of shafts from the gear case is received;a pair of rotors, each of the pair of rotors having a central portion received on one of the pair of shafts inside the axially-extending opening of the hub, each rotor having wings attached to the central portion of the rotor in which the wings of the rotor are disposed radially outward of the hub when the central portion of the rotor is attached to the shaft, the rotors on the pair of shafts being rotatable in opposite directions to pump a pumped product through the pump body from the inlet through the cavity to the outlet;a pair of sleeves, each of the pair of sleeves having a wall extending circumferentially along and about a longitudinal axis to define a central opening therein, the central opening of each of the pair of sleeves receiving a corresponding one of the pair of shafts, and each of the pair of sleeves configured to rotate in concert with the corresponding one of the pair of shafts; anda pair of ...

OIL PUMP

An oil pump has a pump body, an outer rotor, and an inner rotor. The pump body includes a rotor chamber, an inlet port and an outlet port formed in the rotor chamber, an inlet passage communicating with the inlet port, an outlet passage communicating with the outlet port, a relief valve, a relief chamber formed on a discharge side of the relief valve, and an oil return passage formed from the relief chamber to the inlet passage. The outer rotor is supported by the inner circumferential support wall of the rotor chamber. The oil return passage is formed in the inner circumferential support wall as a groove-like recess and opens along an outer circumferential surface of the outer rotor. 1. An oil pump , comprising:a pump body;an outer rotor; andan inner rotor,the pump body including a rotor chamber having an inner circumferential support wall on an inner circumferential side, an inlet port and an outlet port formed in the rotor chamber, an inlet passage communicating with said inlet port, an outlet passage communicating with said outlet port, a relief valve allowing oil to flow from the outlet passage to said inlet passage by relieving pressure, a relief chamber formed on a discharge side of the relief valve, and an oil return passage formed from said relief chamber to said inlet passage;the outer rotor being supported by the inner circumferential support wall of said rotor chamber; andthe inner rotor being arranged on an inner circumferential side of the outer rotor, wherein said oil return passage is formed in said inner circumferential support wall as a groove-like recess and opens along an outer circumferential surface of said outer rotor.2. The oil pump according to claim 1 , wherein said oil return passage is formed at and around a symmetric point of a maximum partition part located between a trailing end of said inlet port and a leading end of said outlet port relative to a center point of said rotor chamber.3. The oil pump according to claim 1 , wherein said ...

Slurry Pump

In a rotor in rotor configuration, a pump has inward projections on an outer rotor and outward projections on an inner rotor. The outer rotor is driven and the projections mesh to create variable volume chambers. The outer rotor may be driven in both directions. In each direction, the driving part (first inward projection) of the outer rotor contacts a sealing surface on one side of an outward projection of the inner rotor, while a gap is left between a sealing surface of the other side of the outward projection and a second inward projection. The gap may have uniform width along its length in the radial direction, while in a direction parallel to the rotor axis it may be discontinuous or have variable size to create flow paths for gases. 1. A fluid transfer device comprising:a housing having an inward facing surface;an outer rotor secured for rotation about an outer rotor axis that is fixed in relation to the housing, the outer rotor having inward projections, the outer rotor being arranged to be driven in operation by a drive shaft;an inner rotor secured for rotation about an inner rotor axis that is fixed in relation to the housing, the inner rotor axis being inside the outer rotor, the inner rotor having outward projections, the outward projections in operation meshing with the inward projections to define variable volume chambers as the inner rotor and outer rotor rotate; fluid transfer passages in a portion of the housing to permit flow of fluid into and out of the variable volume chambers; andeach outward projection having a first sealing surface and a second sealing surface circumferentially opposed to each other for respective engagement with corresponding sealing surfaces of adjacent inward projections such that in an operational configuration in which the outer rotor is driven in a first direction, the first sealing surface seals against a first corresponding inward projection with a first gap between at least part of the second sealing surface and a ...

Gear Wheel with Meshing Teeth

The invention concerns a gear wheel () having a plurality of identical teeth suitable for meshing in parallel with a similar second gear wheel in a casing () of a hydraulic machine, said gear wheel having a side face of the front toothing () and a side face of the rear toothing () suitable for dragging in rotation against a front bush () and a rear bush (), respectively, said bushes () being slotted onto a sleeve () fixedly connected to the gear wheel (), said helical teeth extending along the entire gear wheel () between the front side face () and the rear side face (), where both the side face of the front toothing () and the side face of the rear toothing () have, at each tooth, a removed rotor portion (), so as to have an area of the side faces of the toothing that does not come into contact with the bush when the latter is placed in abutment against the respective side face of the toothing of the gear wheel. 1. A Gear wheel having a plurality of identical teeth suitable for meshing in parallel with a similar second gear wheel in a casing of a hydraulic machine , said gear wheel having a side face of the front toothing and a side face of the rear toothing suitable for dragging in rotation against a front bush and a rear bush respectively , said bushes being slotted onto a sleeve fixedly connected to the gear wheel , said helical teeth extending along the entire gear wheel between the front side face and the rear side face , wherein both the side face of the front toothing and the side face of the rear toothing have , at each tooth , a rotor portion removed , so as to have an area of the side faces of the toothing that does not come into contact with the bush when the latter is placed in abutment against the respective side face of the toothing of the gear wheel.2. The gear wheel according to claim 1 , wherein said removed portion comprises a chamfer uniformly distributed along the entire perimeter of the side faces of the toothing.3. The gear wheel according to ...

Fluid Delivery System With A Shaft Having A Through-Passage

A fluid delivery system having at least one fluid storage device and a pump with at least one fluid driver with a flow-through shaft that has a through-passage. The pump includes a casing, and at least one fluid driver having a prime mover and at least one fluid displacement member. A shaft of the prime mover and/or a shaft of the fluid displacement member and/or a common shaft of the prime mover/fluid displacement member (depending on the configuration of the pump) is a flow-through shaft with a through-passage configuration that allows fluid communication between at least one port of the pump and the at least one fluid storage device. 1. A pump comprising:a casing defining an interior volume, the casing including a first port in fluid communication with the interior volume, and a second port in fluid communication with the interior volume;a first gear disposed within the interior volume, the first gear having a first gear body and a plurality of first gear teeth;a second gear disposed within the interior volume, the second gear having a second gear body and a plurality of second gear teeth projecting radially outwardly from the second gear body, the second gear is disposed such that a second face of at least one tooth of the plurality of second gear teeth aligns with a first face of at least one tooth of the plurality of first gear teeth;a first motor that rotates the first gear about a first axial centerline of the first gear in a first direction to transfer a fluid from the first port to the second port along a first flow path;a second motor that rotates the second gear, independently of the first motor, about a second axial centerline of the second gear in a second direction to contact the second face with the first face and to transfer the fluid from the first port to the second port along a second flow path; andat least one flow-through shaft disposed in at least one of the first motor, the second motor, the first gear and the second gear, each of the at ...

SYSTEMS AND DEVICES FOR PUMPING AND CONTROLLING HIGH TEMPERATURE FLUIDS

The disclosed technology includes pumps, pipes, valves, seals, and systems for pumping and controlling high temperature fluids, such as liquid tin, at temperatures of between 1000-3000° C. The systems and device may be partially or entirely constructed using brittle materials, such as ceramics, that are capable of withstanding extreme heat without significantly degrading, and may be secured using components made of refractory metals, such as tungsten. The systems and devices may utilize static and dynamic seals made from brittle materials, such as graphite, to enable the high temperature operation of such pumps, pipes, valves, and systems without leakage. 1. A pump for pumping at least one of liquids and gases , the pump being formed at least in part from at least one brittle material and configured to operate at temperatures between 500° C. and 3000° C.2. The pump of claim 1 , comprised of a first brittle material and having a seal comprised of a second brittle material.3. The pump of claim 2 , further comprising stationary components sealed by a static seal comprised of the second brittle material and moveable components sealed with a dynamic seal comprised of the second brittle material.4. The pump of comprising: a closed face having an aperture for receiving a shaft;', 'an open face;', 'a chamber disposed between the closed face and the open face, the chamber housing at least a first gear, the first gear being attached to the shaft; and', 'a first plurality of apertures for receiving securing members;, 'a pump body made of the first brittle material, the pump body comprisinga first plate positioned externally to the closed face of the pump body, the first plate being made of the first brittle material or a refractory metal and having an aperture for receiving the shaft and a second plurality of apertures for receiving securing members;a plurality of securing members that are disposed in the first and second plurality of apertures to secure the first plate to the ...

GEAR PUMP FOR COMPRESSIBLE LIQUIDS OR FLUIDS

Disclosed is a gear pump including a pumping chamber in which a first shaft and a second shaft are rotated about their respective axes, each of the first and second shafts supporting at least one hydraulic-pumping element that hydraulically pumps a fluid in the pumping chamber, the at least one hydraulic-pumping element of each of the first and second shafts being positioned in the pumping chamber and each having at least one first radial projection. In the pumping chamber, each of the first and second shafts further supports at least one mechanical drive pinion that rotates each of the first and second shafts, each mechanical drive pinion having second radial projections. The at least one mechanical drive pinion is separate from the at least one hydraulic-pumping element, and the number of the at least one first radial projection and of the second radial projections is different. 1128989. Gear pump () comprising a pumping chamber () in which a first shaft () and a second shaft () are driven in rotation about the respective axis thereof (D , D) ,{'b': 8', '9', '20', '2', '20', '8', '9', '2', '21, 'each of the first and second shafts (, ) bearing at least one hydraulic pumping element () providing the hydraulic pumping of a fluid in the pumping chamber (), said at least one hydraulic pumping element () of each of said first and second shafts (, ) being positioned in said pumping chamber () and each having at least one first radial projection (), wherein'}{'b': 2', '8', '9', '14', '8', '9', '14', '15', '8', '9', '14', '20, 'in the pumping chamber (), each of said first and second shafts (, ) also bears at least one pinion () for mechanically driving in rotation each of said first and second shafts (, ), each mechanical drive pinion () having second radial projections (), wherein, on each of said first and second shafts (, ), said at least one mechanical drive pinion () is distinct from said at least one hydraulic pumping element (),'}{'b': 21', '15, 'and wherein said ...

Dual chamber and gear pump assembly for a high pressure delivery system

A high pressure delivery device for delivering a medicament includes a first chamber for storing a supply of the medicament and a second chamber in fluid communication with the first chamber. A fluid connection path is in fluid communication with the second chamber for administering the medicament. A valving system is in fluid communication with the first chamber, the second chamber and the fluid connection path. The valving system allows a dose of the medicament to be injected from the first chamber into the second chamber while substantially preventing backflow of the dose into the first chamber and substantially preventing leakage through the fluid connection path. The valving system also allows the dose in the second chamber to be administered through the fluid connection path while substantially preventing the dose from flowing back into the first chamber.

OIL PUMP

An oil pump is configured to include a rotor, a drive shaft that drives the rotor to rotate, a rotor chamber in which the rotor is contained, an inlet port and an outlet port each provided in the vicinity of the rotor chamber, and a pump cover. The pump cover is made of a resin. On a portion of an outer surface side of the pump cover corresponding to an inner portion, in which oil circulates, of the pump cover, a rib that has an erecting wall shape is provided. 1. An oil pump comprising:a rotor;a drive shaft that drives the rotor to rotate;a rotor chamber in which the rotor is contained;an inlet port and an outlet port each provided in the vicinity of the rotor chamber; anda pump cover, whereinthe pump cover is made of a resin, andon a portion of an outer surface side of the pump cover corresponding to an inner portion, in which oil circulates, of the pump cover, a rib that has an erecting wall shape is provided.2. The oil pump according to claim 1 , wherein the rib is formed along a shape of the outlet port.3. The oil pump according to claim 1 , wherein the rib is formed on the portion corresponding to a range disposed at a radial middle portion of the outlet port and extending claim 1 , along a direction of the rotation of the rotor claim 1 , to the vicinity of a terminal end of the outlet port or to the vicinity of a beginning end of the inlet port.4. The oil pump according to claim 1 , wherein the rib is formed to extend gradually radially away from a periphery of an insertion portion which is disposed at a radial middle portion of the outlet port and through which the drive shaft is inserted claim 1 , and a portion of the rib extending away has a linear shape.5. The oil pump according to claim 1 , wherein claim 1 , on an outer peripheral side or an inner peripheral side of the rib claim 1 , an auxiliary rib having a length claim 1 , in a direction of the rotation claim 1 , which is shorter than that of the rib is formed to be radially spaced apart by a ...

AERATION PREVENTING APPARATUS

An aeration preventing apparatus including a partition erected on an upper surface of a bottom wall portion of a case member to separate a reservoir space of oil into a radially inward space and a radially outward space and provided with openings formed over a whole circumference in the partition so as to communicate the radially inward space and the radially outward space, an oil passage forming part forming an oil passage from a suction port facing the radially inward space to an oil pump, a movable plate formed in a substantially arc shape and disposed facing a peripheral surface of the partition so as to cover a part of the openings, and a plate support supporting the movable plate to be movable along the peripheral surface of the partition by a gravitational or inertial force acting on the movable plate. 1. An aeration preventing apparatus , comprising:a case member installed in a vehicle and including a bottom wall portion and a side wall portion to form a reservoir space for accumulating an oil supplied from an oil pump;a partition erected on an upper surface of the bottom wall portion and formed in a substantially cylindrical shape about a axial line in a vertical direction to separate the reservoir space into a radially inward space and a radially outward space, the partition including openings formed over a whole circumference in the partition so as to communicate the radially inward space and the radially outward space;an oil passage forming part configured to form an oil passage from a suction port facing the radially inward space to the oil pump;a movable plate formed in a substantially arc shape about the axial line and disposed facing a peripheral surface of the partition so as to cover a part of the openings; anda plate support configured to support the movable plate to be movable along the peripheral surface of the partition by a gravitational or inertial force acting on the movable plate.2. The aeration preventing apparatus according to claim 1 , ...

Hydrodynamic gear assembly

A gear assembly includes a first gear having a first pitch diameter and a second gear having a second pitch diameter different than the first pitch diameter. The first and second gears are located in a housing bore having a cusp line between first and second sections of the housing bore corresponding to the first and second gears. A first gear bearing is located in the first section of the housing bore and has a first flat side. A second gear bearing is located in the second section of the housing bore and has a second flat side. The second flat side is configured to press against the first flat side along the cusp line of the gear housing based on a pressurized fluid being provided to the housing bore.

DUAL INPUT PUMP AND SYSTEM

A dual input fluid pump system for coupling to a transmission or an engine and an electrical motor is disclosed. The system may include a first external gear, vane, internal gear, or gerotor-type pump, a second external gear pump, and connecting shaft. Gears of the second pump include one-way clutch bearings that enable operation of the system in multiple modes including engine-only; motor-only; a combined mode where the engine operates the first pump via the shaft and the motor operates the second pump with an external gear rotating in its pumping direction at a rate greater than the shaft; inlet boost; and a disconnection mode. Also noted is a pump that has a first shaft for coupling the engine to a first external gear and a second shaft for coupling the motor to a second external gear, as well as a one-way clutch bearing that performs in a similar manner. 1. A dual input fluid pump system for coupling to a transmission or an internal combustion engine power source and an electrical motor power source , the pump system comprising:a first pump comprising a housing, a rotatable pumping element rotatably mounted in the housing, an inlet, an outlet, and a first input shaft for coupling the transmission or internal combustion engine power source to the rotatable pumping element thereof for rotating the rotatable pumping element in a pumping direction to pump fluid from the inlet to the outlet through the housing;a second pump that is an external gear pump comprising a housing, at least first and second intermeshed external gears rotatably mounted in the housing, an inlet, an outlet, and a second input shaft for coupling the electrical motor power source to the second external gear thereof for rotating the gears in counter-rotating pumping directions to pump fluid from the inlet to the outlet through the housing; anda connecting shaft between the rotatable pumping element of the first pump and the first external gear of the second pump, the connecting shaft being ...

GEAR PUMP AND METHOD FOR MONITORING A GEAR PUMP

A gear pump includes at least a first and a second rotatable element, wherein the first rotatable element has a toothing system which interacts with a toothing system of the second rotatable element. The gear pump further includes a housing in which the first and/or the second rotatable element are at least partially arranged, and at least one transmitter, which is arranged on the housing, for exciting acoustic waves in the housing. At least one receiver is arranged on the housing, for receiving the acoustic waves which are excited in the housing. Information about properties of the gear pump and/or of a pumping medium can be determined by evaluating a signal which is generated by the receiver when the acoustic waves are received. 1. A gear pump comprising: the first rotatable element has a toothing system which interacts with a toothing system of the second rotatable element;', 'a housing in which the first and/or the second rotatable element are at least partially arranged, and', 'at least one transmitter, which is arranged on the housing, for exciting acoustic waves in the housing and also at least one receiver, which is arranged on the housing, for receiving the acoustic waves which are excited in the housing, wherein information about properties of the gear pump and/or of a pumping medium can be determined by evaluating a signal which is generated by the receiver when the acoustic waves are received., 'at least a first and a second rotatable element, wherein2. The gear pump as claimed in claim 1 , wherein the toothing systems of the first and of the second rotatable element run obliquely in relation to the rotation axis of the respective rotatable element.3. The gear pump as claimed in claim 2 , wherein the gear pump is a screw-spindle pump claim 2 , wherein the toothing systems of the first and of the second rotatable element are each designed in the form of a threaded profile.4. The gear pump as claimed in claim 2 , wherein the transmitter and the receiver ...

TANK FOR STORAGE AND DELIVERY OF FLUIDS INCLUDING FUNCTIONAL COMPONENTS DISPOSED ON THE TANK WALL

A tank for motor vehicle includes a tank wall, a fill opening, an outlet opening, a plurality of functional components, and a plurality of attachment formations. The tank wall forms an outermost casing of the tank. The fill opening passes through the tank wall for inlet of operating fluid into the tank. The outlet opening passes through the tank wall for outlet of the operating fluid. The plurality of functional components are designed for pumping and/or for cleaning and/or for detecting a property and/or for changing a property of the operating fluid. The plurality of attachment formations are designed as being integral with the tank wall for positioning of a plurality of functional components on the tank wall. The functional components are disposed on segments of the tank wall, which are arranged at an incline to each other. 2. The tank according to claim 1 , wherein the tank wall comprises a top wall claim 1 , a bottom wall opposite to the top wall claim 1 , and a side wall connecting the top wall to the bottom wall claim 1 , wherein the top wall claim 1 , the bottom wall and the side wall form tank wall segments arranged at an incline to each other.3. The tank according to claim 1 , wherein at the tank wall claim 1 , preferably at the outer side of the tank wall claim 1 , as one functional component a pumping device is arranged for pumping of operating fluid claim 1 , wherein the pumping device features a suction side for the intake of operating fluid and a pressure side for the ejection of operating fluid.4. The tank according to claim 1 , wherein at the tank wall claim 1 , as one functional component a filter device is arranged for filtering of operating fluid.5. The tank according to claim 1 ,wherein the filter device is connected to the pumping device by a first line extending into the interior of the tank for guiding the operating fluid, wherein the first line features an inlet end nearer to the filter device, and an outlet end nearer to the pumping device, ...

Dual pump system

Provided is a dual pump system including: a dual pump provided with a plurality of chambers independent from each other, wherein an input and an output port are provided in each of the chambers; a plurality of output lines connected to the output ports of the plurality of chambers, respectively; and a switching valve that is provided in an output line of one side of the plurality of output lines, enables a fluid to flow to the output line when operating in one direction, and enables the fluid to be drained to an oil pan through a bypass line branched from the output line when operating in the other direction.

NON-LUBRICATING FLUID PUMPING SYSTEM

One or more techniques and/or systems are disclosed for a pump technology that provides for more effective and efficient transfer of liquids, such as glycol products, in a glycol dehydration system. Such a technology can comprise a type of external gear pump that can effectively handle harsh conditions associated with glycol dehydration system at high pressures, while providing for longer pump life, effective operations at higher temperatures, and operations that account for thermal shock; with improved sealing capability, in a cost-effective system. An example pump may comprise hardened internal components, improved clearances, a jacket to mitigate thermal shock, and/or a thermal shock plate to mitigate thermal shock. 1. A pump for pumping non-lubricating fluids , comprising:an internal pump chamber comprising a first material;a driver shaft that provides rotational power to the pump;a driven shaft that rotates as a result of the rotational power from the driver shaft;a first external gear disposed on the driver shaft in the internal pump chamber, the first external gear comprising a second material;a second external gear disposed on the driven shaft in the internal pump chamber, the second external gear comprising the second material, the first gear and the second gear being disposed in an intermeshing engagement that drives fluid through the internal pump chamber under the rotational power; anda head assembly disposed at an end of the driver shaft and the driven shaft;wherein the first material is different than the second material, and the first material and the second material are rated to 350° F. and are resistant to thermal shock.2. The pump of claim 1 , wherein the fluid comprises glycol.3. The pump of claim 1 , wherein the first material comprises ductile iron and the second material comprises steel claim 1 , hardened steel claim 1 , or a steel alloy.4. The pump of claim 1 , further comprising self-lubricating bushings operably connected to the driver shaft ...

Sintering a Multi-lobed Helical Rotor

The present disclosure relates to a method and system for manufacturing a multi-lobed helical rotor. The method for manufacturing a multi-lobed helical rotor may comprise mixing one or more powdered metals, compacting a mixture of one or more powdered metals to form a solid metal piece, sintering the solid metal piece, and polishing the solid metal piece. The system may comprise a positive displacement pump, which may comprise a casing, a multi-lobed helical rotor disposed in the casing, wherein the multi-lobed helical rotor comprise sintered powdered metals, an inlet to the casing, and an outlet leading from the casing. 1. A method for manufacturing a multi-lobed helical rotor comprising:mixing one or more powdered metals;compacting a mixture of the one or more powdered metals to form a solid metal piece;sintering the solid metal piece; andpolishing the solid metal piece.2. The method of claim 1 , further comprising choosing the one or more powdered metals as the base material for the multi-lobed helical rotor.3. The method of claim 1 , further comprising choosing the one or more powdered metals and at least one additive as the base material for the multi-lobed helical rotor.4. The method of claim 1 , wherein the step of mixing comprises combining the one or more powdered metals with at least one additive.5. The method of claim 1 , wherein the step of compacting comprises adding the at least one powdered metal and at least one additive to a die.6. The method of claim 5 , wherein the step of compacting comprises compacting the at least one powdered metal and at least one additive with a hydraulic ram.7. The method of claim 6 , wherein the step of compacting the at least one powdered metal and the at least one additive with a hydraulic ram forms the multi-lobed helical rotor.8. The method of claim 7 , wherein the step of sintering comprises placing the multi-lobed helical rotor in a furnace.{'claim-ref': {'@idref': 'CLM-00008', 'claim 8'}, 'The method of , wherein ...

PUMPS AND HYDRAULIC CIRCUITS INCLUDING VENTURI ASSEMBLY

A hydraulic circuit includes a pump in fluid communication with a reservoir containing a liquid to be pumped. The pump includes an inlet and an outlet. The hydraulic circuit also includes a venturi pump in fluid communication with the reservoir and with the outlet of the pump, and an injection valve including a cooling feature. The injection valve is in fluid communication with the outlet of the pump, and is configured to dispense liquid supplied to the injection valve by the pump. The cooling feature is in fluid communication with the venturi pump. The pump is configured to produce a first flow of liquid, and the hydraulic circuit is configured to supply a first portion of the first flow of liquid to the injection valve for dispensing by the injection valve and a second portion of the first flow of liquid to the venturi pump. 1. A hydraulic circuit , comprising:a pump in fluid communication with a reservoir containing a liquid to be pumped, the pump including an inlet and an outlet;a venturi pump in fluid communication with the reservoir and with the outlet of the pump;an injection valve including a cooling feature, the injection valve being in fluid communication with the outlet of the pump and configured to dispense liquid supplied to the injection valve by the pump, the cooling feature being in fluid communication with the venturi pump;wherein the pump is configured to produce a first flow of liquid, and the hydraulic circuit is configured to supply a first portion of the first flow of liquid to the injection valve for dispensing by the injection valve and a second portion of the first flow of liquid to the venturi pump.2. The hydraulic circuit of claim 1 , wherein the venturi pump is configured to produce a second flow of liquid from the reservoir and combine the second flow of liquid with the second portion of the first flow of liquid to produce a venturi pump liquid flow.3. The hydraulic circuit of claim 2 , wherein the hydraulic circuit is configured to ...

HORIZONTAL AND VERTICAL WELL FLUID PUMPING SYSTEM

A pump system for producing fluids from a reservoir using a wellbore having a vertical section with a casing defining an annulus, a transitional section and a horizontal section, and a production tubing having a vertical section and a horizontal section, wherein the system includes a completion with an isolation device in the annulus near the bottom of the vertical section, a gas/liquid separator for receiving produced fluids from the horizontal section, and a vertical lift pump; a continuous flow path from the terminus of the production tubing to the vertical section; a plurality of horizontal pumps in the horizontal section, each having an intake exposed to the reservoir and an outlet in the continuous flow path. The horizontal length of the production tubing is closed to the reservoir except through the horizontal pumps. A method of producing fluids includes isolating a vertical section of a wellbore from a horizontal section; isolating the production tubing from the reservoir; pumping fluid from the reservoir adjacent a toe segment into a production tubing toe segment and towards the heel segment; and pumping fluid from the reservoir adjacent a heel segment into the production tubing heel segment and towards the vertical section, and pumping fluid up the vertical section to the surface. Also disclosed is a diaphragm pump. 1. A pump system for producing fluids from a reservoir using a wellbore having a vertical section with a casing defining an annulus , a transitional section and a horizontal section , and a production tubing having a vertical length and a horizontal length ending in a terminus , the system comprising:(a) a completion near a lower end of the vertical section or in the transitional section comprising: an isolation device in the annulus, a gas/liquid separator for receiving produced fluids from the horizontal length of the production tubing, and a vertical lift pump having an intake in the annulus above the isolation device;(b) a continuous flow ...

FUEL PUMP

A pump housing includes: a slide surface, along which inner and outer gears are slid; a suction guide passage, which is recessed from the slide surface and guides the fuel at a suction side; a discharge passage, which is recessed from the slide surface-and guides the fuel at a discharge side; and a communication groove, which is recessed from the slide surface and is shaped into an arcuate form that extends along a circumcircle of the inner gear. The communication groove is communicated with the suction groove and the discharge passage through two opposite groove end parts, respectively, of the communication groove. 1. A fuel pump comprising:an outer gear that includes a plurality of internal teeth;an inner gear that includes a plurality of external teeth and is meshed with the outer gear while the inner gear is eccentric to the outer gear; anda pump housing that rotatably receives the outer gear and the inner gear, wherein:when the outer gear and the inner gear are rotated to increase and decrease volumes of a plurality of pump chambers, which are formed between the outer gear and the inner gear, fuel is sequentially drawn into and is discharged from the plurality of pump chambers; and a pair of slide surfaces which hold the outer gear and the inner gear from two opposite sides, respectively, in an axial direction, so that the outer gear and the inner gear are slid along the pair of slide surfaces;', 'a suction guide passage that is recessed from at least one of the pair of slide surfaces and guides fuel at a suction side;, 'the pump housing includesa discharge guide passage that is recessed from the slide surface, at which the suction guide passage is formed, wherein the discharge guide passage guides the fuel at a discharge side;a communication groove that is recessed from the slide surface at which the suction guide passage and the discharge guide passage are formed, wherein the communication groove is shaped into an arcuate form that extends along a ...

FORKLIFT, INTERNAL GEAR PUMP, AND AXIAL COMPENSATION COMPONENT THEREOF

The present disclosure provides a forklift, an internal gear pump, and an axial compensation component thereof. The axial compensation component for the internal gear pump is configured to be sandwiched between a pump cover of the internal gear pump and a gear pair of the internal gear pump, and the axial compensation component includes: a floating side plate; and a floating sleeve fixed at a side of the floating side plate far away from the gear pair, in which a part of the floating sleeve is configured to extend into an oil storage tank of the pump cover, the oil storage tank is configured to be in communication with a high-pressure oil area of the internal gear pump, and the floating side plate is configured to press tightly against the gear pair under an oil pressure in the oil storage tank. 117.-. (canceled)18. An axial compensation component for an internal gear pump , configured to be sandwiched between a pump cover of the internal gear pump and a gear pair of the internal gear pump , the axial compensation component comprising:a floating side plate; anda floating sleeve fixed on a side of the floating side plate away from the gear pair,wherein a portion of the floating sleeve is configured to extend into an oil storage tank of the pump cover, the oil storage tank is configured to be in communication with a high-pressure oil region of the internal gear pump, and the floating side plate is configured to press tightly against the gear pair under an oil pressure in the oil storage tank.19. The axial compensation component according to claim 18 , wherein:a guide groove configured to be in communication with the high-pressure oil region of the internal gear pump is formed in a side of the floating side plate facing the gear pair, and an installation groove is formed in a side of the floating side plate facing the pump cover; anda portion of the floating sleeve is disposed in the installation groove via an interference fit, the floating sleeve is provided with a ...

Pump-Regulator Combination with Power Limitation

A pump-regulator combination includes first and second pumps, a control valve, first orifice, and pilot valve. The first pump is configured to pump fluid from a tank to a first point. The control valve is configured to control pressure and/or delivery flow at the first point by adjusting a displacement volume of the first pump. The second pump is configured to pump fluid from the tank to a second point, through the first orifice, and back to the tank. A highest load pressure of the actuator is connected to a third point. The pilot valve includes an adjustable second orifice connected to the third point, via a fourth point, and the tank to pass fluid from the actuator to the tank. A pressure at the second point acts to close the second orifice. A pressure of the fourth point acts to adjust the control valve. 1. A pump-regulator combination for use with a tank and at least one actuator , comprisinga first pump that has an adjustable displacement volume, and that is configured to plump pressure fluid from a tank to a work connection point;a control valve configured to control at least one of a pressure and a delivery flow at the work connection point by adjusting the adjustable displacement volume of the first pump;a second pump that has a constant displacement volume, that is configured to be jointly driven with the first pump, and that is further configured to pump pressure fluid from the tank to a first control point;a first orifice that is connected to the first control point and that is configured to connect to the tank to enable pressure fluid from the second pump to return to the tank; anda pilot valve including an adjustable second orifice, the second orifice connected to a load connection point via a second control point, the load connection point configured to connect to a highest load pressure of at least one actuator, and the second orifice further configured to connect to the tank to enable pressure fluid to pass from the load connection point to the tank; ...

SEALING ARRANGEMENT, A CONVEYING DEVICE HAVING A SEALING ARRANGEMENT AND A METHOD FOR OPERATING THE SEALING ARRANGEMENT

The invention relates to a sealing arrangement () for conveying devices, in particular for gear pumps, in which an inner space () can be sealed off from an outer space (), wherein the sealing arrangement comprises at least two parts () each having at least one sealing surface (), wherein the sealing surfaces () comprise: a first seal () along a first, medial perimeter of the sealing surface (), a second seal () along a second, lateral perimeter of the sealing surface (), a recess () between the first seal () and the second seal (), characterized in that the recess () can be connected to a source () of a flushing medium such that the recess () can be actively flushed with the flushing medium. 115.-. (canceled)17. The sealing arrangement as claimed in claim 16 , wherein at least one of the first seal and the second seal comprises an O ring or a spiral seal.18. The sealing arrangement as claimed in claim 16 , further comprising the source claim 16 , wherein the source is configured such that a constant flow of the flushing medium through the recess is maintained or such that a constant pressure of the flushing medium in the recess is maintained.19. The sealing arrangement as claimed in claim 18 , wherein the recess and the source are configured as a closed flushing medium circuit.20. The sealing arrangement as claimed in claim 16 , wherein at least a portion of the recess runs parallel to at least one of the first seal and the second seal.21. The sealing arrangement as claimed in claim 16 , further comprising an inlet point for the flushing medium and an outlet point for the flushing medium claim 16 , said inlet point and outlet point being operatively connected to the recess.22. The sealing arrangement as claimed in claim 16 , wherein the first part is a housing of the conveying device and the second part is a cover on the housing of the conveying device.23. The sealing arrangement as claimed in claim 16 , further comprising a flow sensor measuring a flow of flushing ...

Gerotor Pump And Method Of Making Pressure Equalization In A Gerotor Pump

A gerotor pump having an inner rotor and an outer rotor, which is also the rotor of an electric drive, having a housing and a flange which closes the housing with the motor compartment, the rotor being arranged on a shaft and sealing against the flange at a gap, wherein, in addition to the gap, there is at least one device with which at least a partial pressure compensation takes place between the suction region of the gerotor pump and the motor compartment of the gerotor pump. 1. A gerotor pump having an inner rotor and an outer rotor , which is also the rotor of an electric drive , having a housing and a flange which closes the housing with the motor compartment , the rotor being arranged on a shaft and sealing against the flange at a gap , wherein , in addition to the gap , there is at least one device with which at least a partial pressure compensation takes place between the suction region of the gerotor pump and the motor compartment of the gerotor pump.2. The gerotor pump according to claim 1 , wherein the device is a connection between the motor compartment and the suction region claim 1 , the connection being provided as a bore in the flange.3. The gerotor pump according to claim 1 , wherein the device consists of a cavity in the shaft and connections between the motor compartment and the cavity of the shaft and the cavity of the shaft to the suction region.4. The gerotor pump according to claim 3 , wherein the cavity in the shaft has a taper which serves as a throttle.5. The gerotor pump according to claim 1 , wherein the device consists of a cavity in the shaft and connections between the motor compartment and cavity of the shaft and cavity of the shaft to an eccentric bearing of the gerotor pump.6. The gerotor pump according to wherein at least one of the connections has a reduction in cross-section which serves as a throttle.7. A method for producing a pressure compensation in a gerotor pump according to one of the preceding claims claim 1 , wherein an ...

Pressure compensated external gear machine

Devices and systems relating to external gear machines that comprise microsurface shaping on the lateral surfaces of the gear teeth and/or bushing surfaces are provided. Such microsurface shaping may comprise a flat step to linear wedge profile, a flat step to flat step profile, or solely a linear wedge profile. The incorporation of microsurface shaping on the gear teeth and/or bushing plates contributes to improving the lubrication performance within the external gear machine and provides significant benefits, including the improvement of operating efficiency, life, and reliability of the system components. Methods for manufacturing the gear teeth and related bushings are also provided, the methods configured to optimize the overall axial balance within the system.

SCREW-TYPE POSITIVE DISPLACEMENT MACHINE

A screw-type positive displacement machine includes a housing with a first rotor and a second rotor which are mounted to rotate in the housing and which are driven in directions which are the opposite of one another. The positive displacement machine has a first motor and a second motor arranged in a drive casing and connected to the housing in such a way that the first rotor is driven by the first motor and the second rotor is driven by the second motor. Typically, the first motor and/or the second motor is an asynchronous motor. 1. Screw-type positive displacement machine comprising a housing with a first rotor and a second rotor mounted to rotate in the housing and driven in directions opposite of one another ,characterized in that the positive displacement machine comprises a first motor and a second motor arranged in a drive casing and connected to the housing in such a way that the first rotor is driven by the first motor and the second rotor is driven by the second motor.2. Positive displacement machine according to claim 1 , characterized in that the first motor and/or the second motor is an asynchronous motor.341. Positive displacement machine according to claim 1 , characterized in that the rotary part of the first motor is connected to the first rotor and/or the rotary part (″) of the second motor is connected to the second rotor.4. Positive displacement machine according to claim 1 , further comprising a first synchronization wheel and a second synchronization wheel claim 1 , which mesh with one another claim 1 , connected to the first rotor and second rotor respectively.5. Positive displacement machine according to claim 4 , characterized in that a contact surface between the first synchronization wheel and the second synchronization wheel is not lubricated.6. Positive displacement machine according to claim 4 , characterized in that the surface of the teeth of the first synchronization wheel and/or of the second synchronization wheel is covered by a ...

Internal gear pump

An internal gear pump includes an outer rotor having internal teeth, an inner rotor rotatably disposed inside the outer rotor and having external teeth engaging with the internal teeth, and a pump housing. The pump housing includes: a holding recess rotatably holding the outer rotor and having a wall on which an outer peripheral face of the outer rotor is to slide; an inlet to take in a fluid into pump chambers defined between the inner rotor and the outer rotor; an outlet to discharge the fluid from the pump chambers; a case groove provided on the wall and to hold the fluid; and a joint groove provided on an upper land face defined between a trailing end of the inlet and a leading end of the outlet and on which the internal teeth and the external teeth are to slide.

Toy Fluid Pumping Gun

A fluid pumping device is disclosed. The fluid pumping device includes a housing having a front end and a rear end, a fluid discharge opening in the front end of the housing, a pump assembly, a crank assembly rotatably connected to the pump assembly wherein the crank assembly operates the pump assembly, and a fluid storage reservoir connected to the gear housing from which fluid is drawn into the gear housing to be pumped through the fluid discharge opening. 1. A fluid pumping device comprising:a housing having a top;a fluid discharge opening in the housing;a pump assembly;a fluid storage reservoir connected to the pump assembly;a fluid path connected to the fluid storage reservoir and the fluid discharge opening; anda plurality of nozzles on the top of the housing wherein the nozzles are not fluidly connected to the fluid path and wherein the plurality of nozzles configured to be placed over the fluid discharge opening.2. The fluid pumping device of wherein the pump assembly comprising:a first gear; anda second gear, wherein the first gear is larger in diameter than the second gear and wherein the gear ratio between the first gear and the second gear is 15:1.3. The fluid pumping device of further comprising a crank assembly rotatably connected to the pump assembly wherein the crank assembly operates the pump assembly.4. The fluid pumping device of wherein the crank assembly further comprising:a crank arm; anda crank handle connected to the crank arm.5. The fluid pumping device of wherein the crank arm further comprising at least one notch and wherein the crank handle may be connected to the crank arm through the at least one notch.6. The fluid pumping device of wherein the crank arm further comprising at least two notches and wherein the crank handle may be connected to the crank arm through any one of the at least two notches whereby the length of the crank arm is determined by the position of the crank handle.7. The fluid pumping device of further comprising at ...

A beverage dispensing machine and a gear pump therefor

A gear pump for a beverage dispensing machine, has a pump chamber, and a driving gear wheel meshing with a driven gear wheel inside the pump chamber.

Dual-screen movement converter

A dual-screw movement converter, in which a movement converter between a drive organ includes a screw fixed in translation and driven in rotation, having threads, a nut connected in translation to the receptor organ, having first threads engaging with the threads of the screw and second threads. A sleeve coaxially surrounds the nut, fixed in rotation and translation with respect to the screw and having threads with which the second threads of the nut engage. To the nut, slaved by its second threads to the threads of the sleeve, screw communicates a combined movement of rotation and translation whose translation component along an axis is transmitted to the receptor organ. 1. A screw-operated movement converter between a drive organ and a receptor organ , comprising:a screw having an axis of rotation, fixed in translation and driven in rotation, and having threads;a nut connected in translation to the receptor organ and having first threads engaging with the threads of the screw and second threads; anda sleeve coaxially surrounding the nut and fixed in rotation and in translation with respect to the screw and having threads with which the second threads of the nut engage;wherein the screw, driven in rotation, communicates to the nut, slaved by the second threads to the threads of the sleeve, a combined movement of rotation and translation whose translation component along the axis of rotation is transmitted to the receptor organ.2. The converter of claim 1 , wherein the first threads of the nut are interior threads and the screw has corresponding exterior threads.3. The converter of claim 1 , wherein the second threads of the nut have a length less than one half-turn.4. The converter of claim 1 , wherein the threads of the sleeve are composed of one or more thread segments of different pitch.5. The converter of claim 3 , wherein the second threads of the nut have the shape of a curvilinear parallelogram whose large sides claim 3 , slightly curved claim 3 , are ...

TRIPLE GEAR PUMP AND FLUID SUPPLYING DEVICE

A gear pump is comprised of a driving gear, a first driven gear and second driven gears mutually in mesh; a housing accommodating them and defining a flow path including a first suction port, a second suction port, a first pressure port and a second pressure port; a floating comprising a thrust face bearing a floating force exerted by fluids and first, second and third pressure-receiving faces respectively oriented in a direction opposed to the thrust face; a first pressurizing chamber having fluid connection with the first pressure port or the second pressure port to exert pressure on the first pressure-receiving face; a second pressurizing chamber having fluid connection with the first suction port to exert pressure on the second pressure-receiving face; and a third pressurizing chamber having fluid connection with the second suction port to exert pressure on the third pressure-receiving face. 1. A gear pump comprising:a driving gear rotatable about a driving shaft, and first and second driven gears respectively meshing with the driving gear to follow rotation of the driving gear;a housing accommodating the driving gear, the first driven gear and the second driven gear, and defining a flow path including first and second suction ports capable of sucking fluids, a first pressure port employing rotation of the driving gear and the first driven gear to pressurize and discharge the fluid from the first suction port, a second pressure port employing rotation of the driving gear and the second driven gear to pressurize and discharge the fluid from the second suction port;a floating bearing supporting the driving gear so as to allow the driving gear to rotate about the driving shaft and being capable of floating along the driving shaft, and comprising a thrust face bearing a floating force exerted by the fluids along the driving shaft and first, second and third pressure-receiving faces respectively oriented in a direction opposed to the thrust face;a first pressurizing ...

Actuation method and efficiency

A multi-stage centrifugal pump assembly allows for multiple fixed ratio pressure levels. The multiple pressure levels permit optimization of actuation loops without the need for pressure regulators, and can be used directly by the actuators.

Remanufacturing a transmission pump assembly

A transmission pump is be removed from service and remanufactured into a remanufactured transmission pump. A first gear assembly is removed from the pump. A bore of the pump is machined from a first depth to a greater second depth. A second gear assembly is installed in the machined bore. The second gear assembly has a same horizontal geometry and a greater axial depth than the first gear assembly.

VARIABLE SPEED MULTI-STAGE PUMP

A multi-stage gear pump includes a first pump stage, a second pump stage, and a variable speed gearbox including an input and an output, wherein the input is rotationally coupled to the first pump stage and the input rotates at a first rotational speed, and the output is rotationally coupled to the second pump stage and rotates at a second rotational speed, wherein a variable gear ratio determines the second rotational speed relative to the first rotational speed. 1. A multi-stage gear pump , comprising:a first pump stage;a second pump stage; anda variable speed gearbox including an input and an output, wherein the input is rotationally coupled to the first pump stage and the input rotates at a first rotational speed, and the output is rotationally coupled to the second pump stage and rotates at a second rotational speed, wherein a variable gear ratio determines the second rotational speed relative to the first rotational speed.2. The multi-stage gear pump of claim 1 , further comprising a gearbox controller to adjust the variable gear ratio.3. The multi-stage gear pump of claim 2 , further comprising an electronic engine controller to provide at least one operating parameter to the gearbox controller.4. The multi-stage gear pump of claim 3 , wherein the gearbox controlled adjusts the variable gear ratio in response to the at least one operating parameter.5. The multi-stage gear pump of claim 1 , wherein the first pump stage is a main pump stage.6. The multi-stage gear pump of claim 1 , wherein the first pump stage is an actuator pump stage.7. The multi-stage gear pump of claim 1 , wherein the second pump stage is a main pump stage.8. The multi-stage gear pump of claim 1 , wherein the second pump stage is an actuator pump stage.9. The multi-stage gear pump of claim 1 , further comprising a boost stage claim 1 , wherein the boost stage is rotationally coupled to the first pump stage.10. The multi-stage gear pump of claim 1 , further comprising a boost stage claim 1 , ...

GEAR PUMP DEVICE

In the present invention, polishing lines are connected to an outer circumferential high-pressure region, but are not connected to each area that is a low-pressure region. In this configuration, the polishing lines are connected to the outer circumferential high-pressure region where there is high discharge pressure, so high-pressure brake fluid is introduced within the polishing lines . Therefore, a pushback effect is obtained, wherein gear pumps and are pushed back on the basis of the high-pressure brake fluid pressure. Furthermore, the polishing lines are connected to the outer circumferential high-pressure region but are not connected to each area that is a low-pressure region, so high-pressure can be maintained within the polishing lines , and a reduction in the pushback effect can be prevented. Accordingly, a decrease in the loss torque reduction effect can be prevented, and the loss torque can be further reduced. 1. A gear pump device comprising:a gear pump which has an outer rotor having an inner tooth portion and an inner rotor meshed with the outer rotor while forming a plurality of void portions and performs a suction/discharge operation of a fluid by rotating the outer rotor and the inner rotor based on rotation of a shaft inserted into a center hole of the inner rotor;a case that forms a housing portion that houses the gear pump; anda sealing mechanism disposed between the case and one of pump shaft direction end surfaces of the gear pump and, in the gear pump, partitioning a low-pressure side including a suction side sucking a fluid and a periphery of the shaft, and a high-pressure side including a discharge side discharging the fluid and a part of gaps between an outer periphery of the outer rotor and the case,the other end surface of the pump shaft direction end surfaces in the gear pump being brought into contact with a sliding surface of the case based on pressing force of the sealing mechanism to seal a portion between the low-pressure side and ...

IDLER GEAR FOR POSITIVE DISPLACEMENT GEAR PUMP

One or more techniques and/or systems are disclosed for a gear pump for low speed transfers of viscous liquid slurries promotes growth of suspended particles, such as sugar crystals, by avoiding crushing of the particles. The pump includes a rotor gear in mesh with an eccentrically mounted idler gear supported on a boss of a pump head that includes a crescent seal extending into an opening resulting from the eccentricity of the idler gear relative to the rotor gear. The idler gear contains a radially extending land on each tooth profile, symmetrically oriented on adjacently spaced pairs of teeth. The lands, configured to minimize crushing of crystals passing through the pump, engage mating rotor teeth for sealing between inlet and outlet ports of the pump. To promote crystal growth, the lands cover only 10% to 30% of profile surface area of each tooth. To minimize gear tooth wear, the lands are axially staggered between successive adjacent pairs of teeth. 1. A positive displacement gear pump comprising:a casing defining a casing interior, the casing comprising an inlet port and an outlet port for transferring a target fluid though the casing interior;an external rotor gear supported within an inboard end of the casing by a rotor shaft, the external rotor gear comprising radially inwardly oriented teeth;a head positioned at an outboard end of the casing; andan internal idler gear rotationally supported on the head about an idler gear axis within the casing interior, the internal idler gear comprising radially outwardly oriented teeth, the internal idler gear being operably disposed on the head in a fixed, radially eccentric, relationship with the external rotor gear, and at least a portion of the internal idler gear teeth operably meshing with at least a portion of the external rotor gear teeth; two radially oriented surfaces respectively extending between a root and a tip of the idler gear tooth;', 'a land comprising a substantially planar surface rising from the ...

Pump Assembly and Method for Producing a Pump Assembly

A pump assembly which comprises at least one housing and two gear wheels as conveying means. The housing comprises at least one base plate and a cover element, which are interconnectable in order to form a pressure chamber. An outer circumferential surface of each of the two gear wheels has a toothing, and said gear wheels intermesh via the toothings in order to convey a fluid. The gear wheels are arranged along an axial direction in the pressure chamber between the base plate and the cover element. The pressure chamber is formed in the housing at least by two bores. The first gear wheel is arranged in a first bore and the second gear wheel is arranged in a second bore. A plurality of centering pins are provided for aligning the bores and the gear wheels with respect to one another, wherein all said centering pins are arranged exclusively in the cover element or exclusively in the base plate. 1. A pump assembly comprisinga housing with at least one base plate and a cover element, which are interconnectable in order to form a pressure chamber; andtwo gear wheels, wherein an outer circumferential surface of the first gear wheel has a first toothing with a first outside diameter and an outer circumferential surface of the second gear wheel has a second toothing with a second outside diameter, wherein the gear wheels intermesh via the toothings in order to convey a fluid; wherein the gear wheels are arranged along an axial direction in the pressure chamber between the base plate and the cover element;wherein the pressure chamber is formed in the housing at least by two bores, wherein the first gear wheel is arranged in a first bore with a first inside diameter and the second gear wheel is arranged in a second bore with a second inside diameter, wherein a plurality of centering pins are provided for aligning the bores and the gear wheels with respect to one another, wherein all said centering pins are aligned with respect to one another exclusively via the cover element ...

Pump Assembly

A pump assembly, which comprises at least one housing and two gear wheels as transfer means as well as a drive shaft. The housing comprises at least one base and one cover element, which can be connected together in order to constitute a pressure chamber. Each of the two gear wheels has a toothing on an outer circumferential surface and mesh with one another via the toothing in order to transfer a fluid. The gear wheels are arranged in an axial direction between the base and the cover element in the pressure chamber. The drive shaft extends into the housing in the axial direction via an opening in the cover element. The first gear wheel is arranged on a first bearing bush, wherein the first bearing bush is mounted only in the base. The first gear wheel is connected to the drive shaft via a formfitting connection in a circumferential direction. 2. The pump assembly as claimed in claim 1 , wherein the drive shaft is arranged in a radial direction with a free clearance with respect to the first gear wheel and the first bearing bush.3. The pump assembly as claimed in claim 1 , wherein the drive shaft is arranged mounted exclusively outside the housing with respect to a force acting in a radial direction.4. The pump assembly as claimed in claim 1 , wherein the formfitting connection is constituted by an inner circumferential surface of the first gear wheel and an outer circumferential surface of the drive shaft.5. The pump assembly as claimed in claim 1 , wherein the drive shaft and the first gear wheel or the drive shaft and the first bearing bush constitute an abutment against displacement in the axial directions.6. The pump assembly as claimed in claim 1 , wherein the first bearing bush is connected to the base via a press fit.7. The pump assembly as claimed in claim 1 , wherein the first bearing bush is connected in an integrally bonded manner to and formed integrally with the base.8. The pump assembly as claimed in claim 1 , wherein at least the base and the cover ...

Planetary Gear Pump

A planetary gear pump comprising a central gear and a plurality of planet pairs provides a space efficient transducer between hydraulic and mechanical energy. When it is configured as a pump, a high flow rate is provided. When it is configured as an actuator, a high torque is provided. A dual-stage configuration may be used as a low speed high torque actuator with high energy efficiency, high pitch velocity, and low slippage.

GEAR PUMP BEARINGS WITH HYBRID PADS

A gear pump includes a drive gear mounted to a first gear shaft, a driven gear meshable with the drive gear, a plurality of journal bearings, and a first porting path. The first porting path is adapted to provide high pressure fluid communication from a discharge of the gear pump to a first hybrid pad location for a first journal bearing selected from the plurality of journal bearings, the first hybrid pad location circumferentially adjacent to a first fluid film location. Each location is disposed annularly between an inner surface of the first journal bearing, and an outer surface of the first gear shaft or second gear shaft corresponding to the first journal bearing. 1. A gear pump comprising:a drive gear mounted to a first gear shaft;a driven gear meshable with the drive gear, the driven gear mounted to a second gear shaft; a drive-side pressure loaded journal bearing disposed about a first longitudinal end of the first gear shaft;', 'a drive-side stationary journal bearing disposed about a second opposing longitudinal end of the first gear shaft;', 'a driven-side pressure loaded journal bearing disposed about a first longitudinal end of the second gear shaft; and', 'a driven-side stationary journal bearing disposed about a second opposing longitudinal end of the second gear shaft; and, 'a plurality of journal bearings including at leasta first porting path adapted to provide high pressure fluid communication from a discharge of the gear pump to a first hybrid pad location for a first journal bearing selected from the plurality of journal bearings, the first hybrid pad location circumferentially adjacent to a first fluid film location, and each location disposed annularly between an inner surface of the first journal bearing, and an outer surface of the first gear shaft or second gear shaft corresponding to the first journal bearing.2. The gear pump of claim 1 , wherein the porting path comprises:a discharge face cut on the first journal bearing for receiving ...

ROTARY PUMP OR MOTOR WITH ORBITAL PISTON ASPIRATION, METHODS OF PRODUCTION AND USES THEREOF

Rotary components are described that include a housing comprising a rotor having a rotor working face and a gate having a gate working face and a pocket; at least one vane, wherein the vane is coupled to the rotor; at least one wiper coupled to the vane; a plurality of endplates coupled to the housing, wherein at least one of the endplates is a float plate; an intake chamber; and an outlet chamber. In addition, methods of aspirating a working medium by utilizing the rotary component having at least one float plate includes pulling the working medium into the intake chamber, depositing the working medium into a working chamber that is located between the intake chamber and the outlet chamber; maintaining the working medium in a stationary position until the vane sweeps around toward the outlet chamber; accumulating the working medium into the outlet channel of the outlet chamber; and centrifugally ejecting the working medium into the outlet chamber and out of the system. 123-. (canceled)24. A method of aspirating a working medium by utilizing a rotary component , the method comprising: a housing comprising a rotor having a rotor working face and a gate having a gate working face and a pocket;', 'at least one vane, wherein the vane is coupled to the rotor;', 'at least one wiper coupled to the vane;', 'a plurality of endplates coupled to the housing, wherein at least one of the endplates is a float plate;', 'an intake chamber; and', 'an outlet chamber;, 'providing a rotary component comprisingpulling the working medium into the intake chamber, depositing the working medium into a working chamber that is located between the intake chamber and the outlet chamber;maintaining the working medium in a stationary position until the vane sweeps around toward the outlet chamber;accumulating the working medium into the outlet channel of the outlet chamber; andcentrifugally ejecting the working medium into the outlet chamber and out of the system.25. The method of claim 24 , ...

COMPOSITE ROTARY COMPONENT

The present teachings generally include a rotor assembly having a plurality of rotor sheets or layers mounted to a shaft, and methods of construction for a rotor assembly. Each rotor sheet or layer in the assembly may be provided with a central opening extending between the first and second sides through which the shaft extends. In one aspect, the rotor sheets or layers can be provided with a plurality of lobes extending away from the central opening, wherein each of the lobes can have a lobe opening extending through the thickness of the sheets or layers. In one example, the rotor sheets or layers can be rotationally stacked to form a helical rotor. In one example, the rotor sheets are formed from a pre-cured composite material and are bonded together with an adhesive. 1. A rotor assembly comprising: i. a first side and a second opposite side separated by a first thickness;', 'ii. a central opening extending between the first and second sides;', 'iii. a plurality of lobes extending away from the central opening, each of the lobes having a longitudinal axis intersecting the center of the central opening;, 'a. a plurality of rotor sheets, each rotor sheet includingb. at least one rotor sheet being formed from a fiber reinforced composite material; andc. a shaft extending through the central opening of each of the plurality of rotor sheets;d. wherein the plurality of rotor sheets is stacked and secured together to form the rotor assembly such that at least one of the first and second sides of one rotor sheet is adjacent to and in contact with at least one of the first and second sides of another rotor sheet.2. The rotor assembly of claim 1 , wherein the fiber reinforced composite material of the at least one rotor sheet includes a fiber substrate and a plastic resin.3. The rotor assembly of claim 2 , wherein the fiber substrate of the at least one rotor sheet is a carbon fiber substrate.4. The rotor assembly of claim 3 , wherein the carbon fiber substrate of the at ...

Fluid Pump With Shim And Related Methods Of Manufacture

A fluid pump includes a gear housing with a pocket wall and a base. The pocket wall and the base define a pocket that projects into the gear housing from a pocket surface. The fluid pump also includes a first gear rotatably positioned in the pocket. The first gear is spaced from the pocket surface by a first gap. The fluid pump also includes a second gear rotatably positioned in the pocket that engages the first gear. The second gear is spaced from the pocket surface by a second gap. The fluid pump also includes a selected shim that is selected from a plurality of shims in a shim set. The selected shim has a thickness that results in a desired clearance between the selected shim and the first face or the second face. 1. A fluid pump comprising:a gear housing including a pocket wall and a base, the pocket wall and the base defining a pocket that projects into the gear housing from a pocket surface;a first gear rotatably positioned in the pocket, the first gear including a first face that is spaced from the pocket surface by a first gap;a second gear rotatably positioned in the pocket and engaging the first gear, the second gear including a second face that is spaced from the pocket surface by a second gap; anda selected shim positioned in the pocket over the first gear and the second gear, wherein the selected shim is selected from a plurality of shims in a shim set by comparing thicknesses of the shims in the plurality of shims to the first gap or the second gap, the selected shim having a thickness that results in a desired clearance between the selected shim and the first face or the second face.2. The fluid pump of wherein the desired clearance is a minimum clearance.3. The fluid plump of wherein the pocket wall includes two rounded portions to define a pocket with a first circular depression and a second circular depression claim 1 , the first circular depression configured to receive the first gear and the second circular depression configured to receive the ...

Curvilinear circular-arc tooth gears for use in external gear pumps

A curvilinear circular-arc-toothed (CCAT) gear for improving gear performance and reducing noise while avoiding axial loads common to helical gears includes an annular gear body; and a gear tooth having a hybrid gear tooth profile comprising one or more curves configured to provide a sweep of the gear tooth space by a mating gear tooth while maintaining smooth contact during gear mesh, and wherein the gear tooth extends along an axial length of the gear body along an axial profile. 1. A curvilinear circular-arc-toothed (CCAT) gear for improving gear performance and reducing noise while avoiding axial loads common to helical gears , the CCAT gear comprising:an annular gear body; anda set of gear teeth, with each tooth extending radially away from the gear body and extending axially along the gear body, andwherein the gear tooth has a cross-sectional profile transverse to the rotational axis of the gear body, the cross-sectional profile formed from a hybridization of two or more curves, the two or more curves defining a tooth tip, a tooth flank, and a tooth root, andwherein the gear tooth has an axial tooth profile defining a circumferential positioning of the gear tooth on the gear body relative to a respective axial positioning of the gear tooth on the gear body, the axial tooth profile being generally symmetric across the midplane of the gear to reduce axial loading on gears induced by gear meshing.2. The CCAT gear of claim 1 , wherein the axial tooth profile is continuously differentiable.3. The CCAT gear of claim 1 , wherein the axial tooth profile is fully symmetric about an axial mid-plane of the gear to eliminate axial loading from gear meshing.4. The CCAT gear of claim 1 , wherein the axial tooth profile has an initial helix angle at each end of the gear.5. The CCAT gear of claim 1 , wherein the axial tooth profile is curvilinear.6. The CCAT gear of claim 5 , wherein the axial tooth profile is a half-period sinusoid function.7. The CCAT gear of claim 1 , ...

VARIABLE FLOW ENGINE OIL PUMP

A variable flow engine oil pump has a first seat, a second seat attached to the first seat, and a regulating valve assembly and a pressurizing assembly mounted in the second seat. An eccentric wheel of the pressurizing assembly meshes with a plug of the regulating valve assembly. With the plug driving the eccentric wheel to rotate by an angle, a volume flow rate of engine oil output by the engine oil pump can be adjusted. Elements used for adjusting the output of the engine oil are reduced, and manufacturing cost and assembling complexity of the engine oil pump are lowered accordingly. Moreover, since the regulating valve assembly drives the pressurizing assembly directly, the regulating valve assembly can drive the pressurizing assembly efficiently. 1. A variable flow engine oil pump comprising: a first axial hole formed through the first seat; and', 'an oil return channel formed in an inner surface of the first seat;, 'a first seat having'} a second axial hole formed through the second seat and aligning with the first axial hole;', 'an oil inlet formed through the second seat;', 'an oil outlet formed through the second seat;', 'an oil regulating chamber formed in the second seat, being elongated, and having an inner end;', 'a guiding channel formed in the second seat and communicating with the inner end of the oil regulating chamber; and', 'an oil return hole formed in an inner surface of the second seat, communicating with the oil regulating chamber, and corresponding in position to and communicating with the oil return channel;, 'a second seat attached to the first seat and having'}an oil inlet chamber formed in the first seat and the second seat;an oil outlet chamber formed in the first seat and the second seat and communicating with the guiding channel; [ an open end;', 'a closed end facing and selectively sealing the guiding channel;', 'a receiving recess formed in the open end of the plug; and', 'a driving toothed portion formed on an outer surface of the ...

FUEL SUPPLY SYSTEM AND FUEL SUPPLY METHOD

What is provided is a fuel supply system that includes a fuel gear pump that is driven by an electric motor and sends fuel in a fuel tank to a fuel nozzle that supplies fuel to the combustor, a controller that controls a rotational speed of the electric motor, and the flow rate measurer that measures the flow rate of fuel discharged from the fuel gear pump. When the difference between the fuel flow rate actually discharged from the electric motor and a target value of the flow rate is equal to or greater than a first threshold value with respect to the target value, the controller adjusts the rotational speed of the electric motor so that the measured value of the flow rate of the fuel discharged from the fuel gear pump approaches the target value. 1. A fuel supply system comprising:a fuel gear pump configured to be driven by an electric motor and to send fuel in a fuel tank to a fuel nozzle that supplies the fuel to a combustor; anda control device,wherein the control device includesa storage device configured to store a program, anda hardware processor,wherein the hardware processor executes the program stored in the storage device toexecute a control process of a rotational speed of the electric motor, andmeasure a flow rate of the fuel to be discharged from the fuel gear pump, andwhen a difference between the fuel flow rate actually discharged from the electric motor and a target value of the flow rate is equal to or greater than a first threshold value with respect to the target value in the control process, a rotational speed of the electric motor is adjusted so that a measured value of the flow rate of the fuel discharged from the fuel gear pump approaches the target value.2. The fuel supply system according to claim 1 , wherein the target value is set for each rotational speed based on past discharge flow rate characteristics of the fuel gear pump claim 1 , andthe hardware processor acquires the target value of the flow rate with respect to a current ...

Improvements In and Relating to Gear Pumps

Disclosed is a gear pump () comprising a contra rotating gear element pair ( and ) mounted within a housing (), each gear element having complementary gear teeth sets providing a pumping action in use, said teeth being formed from an annulus ( and ) of generally rigid construction mounted on a relatively flexible inner section ( and ), the gear pair being mounted such that their respective annuli are biased into resilient contact with the housing to provide a sliding seal. 1. A gear pump comprising a housing supporting first and second gear elements having complementary teeth or other projections cooperable to provide a pressure differential in a fluid circuit by means of rotation of the first and second gear elements , the first , or the first and second elements being arranged in the pump for resilient contact of its/their teeth with the housing to provide sliding sealing contact between the teeth and the housing in use , wherein the first and/or second gear elements include a relatively rigid outer portion forming at least a portion of said teeth or other projections , and an inner relatively more flexible section between the outer portion and a centre of rotation of the or each gear element.2. The gear pump as claimed in claim 1 , wherein said first and second gear elements are contra-rotating elements and wherein the teeth of both gears come together in use in resilient contact.3. The gear pump as claimed in claim 1 , wherein the inner flexible section is formed from one or more of: flexible spokes; continuous elastomeric material; elastomeric material claim 1 , foamed material and voids in the elastomeric material.4. The gear pump as claimed in claim 3 , wherein claim 3 , where said inner section is formed from flexible spokes claim 3 , said spokes are swept backwards in relation to the intended direction of rotation of the spokes.5. The gear pump as claimed in claim 1 , wherein said housing includes a portion biased towards one or more of the gear elements to ...

SCAVENGE/CHARGE PUMP DRIVE GEAR FOR INTEGRATED DRIVE GENERATOR

A scavenge/charge pump drive gear for use in an integrated drive generator has a gear body extending between a first end and a second end and having a disc extending radially outwardly. A boss extends from the disc toward the second end. There are outer gear teeth outwardly of an outer diameter of the disc. The outer gear teeth have a unique gear tooth profile with roll angles A, B, C, and D. An integrated drive generator and a method are also disclosed. 1. A scavenge/charge pump drive gear for use in an integrated drive generator comprising:a gear body extending between a first end and a second end and having a disc extending radially outwardly, and a boss extending from said disc toward said second end, there being outer gear teeth outwardly of an outer diameter of said disc, said outer gear teeth having a gear tooth profile with roll angles A, B, C, and D, and the roll angle at A for said outer gear teeth being between 20.9 and 22.3 degrees, the roll angle at B for said outer gear teeth being between 22.7 and 24.2 degrees, the roll angle at C for said outer gear teeth being between 28.2 and 29.7 degrees, and the roll angle at D for said outer gear teeth being between 30.0 and 31.5 degrees.2. The scavenge/charge pump drive gear as set forth in claim 1 , wherein said outer gear teeth have a pitch diameter of 3.10 inches (7.87 centimeters) with a tolerance of +/−0.01 inch (0.025 centimeters).3. The scavenge/charge pump drive gear as set forth in claim 2 , wherein there are 62 of said outer gear teeth.4. The scavenge/charge pump drive gear as set forth in claim 3 , wherein there are eight spline teeth within a bore in said boss.5. The scavenge/charge pump drive gear as set forth in claim 4 , wherein said outer gear teeth have a maximum form diameter of 3.00 inches (7.62 centimeters).6. The scavenge/charge pump drive gear as set forth in claim 1 , wherein there are eight spline teeth within a bore in said boss.7. The scavenge/charge pump drive gear as set forth in ...

GEAR PUMP DEVICE

Provided is a gear pump device that enables improvement in volumetric efficiency and manufacturability, and also makes it possible to ensure sealing property and to reduce drive torque. According to the present invention, a sealing mechanism is provided with an annular rubber member, an outer member, and an inner member, wherein: the inner member has, at an end of an outer peripheral wall on the side of an inner gear in the axial direction, a notch which is recessed radially inward of the inner gear so as to form, together with an axial one end face of the inner gear, a depressed part; and the outer member has an insertion part which is disposed within the depressed part and which abuts against the axial one end face of the inner gear so as to constitute a part of a sealing surface on the other side. 1. A gear pump device , comprising:a gear pump having an outer gear and an inner gear, wherein the outer gear has an internal tooth portion and the outer gear and the inner gear are configured to be meshed with each other while forming a plurality of void portions therebetween, wherein the gear pump is configured to suck and discharge a fluid as the outer gear and the inner gear are rotated by rotation of a shaft;a case defining a receiving portion, in which the gear pump is received; anda seal mechanism arranged between the case and the gear pump and configured to partition a low pressure side, which includes a suction side of the gear pump sucking the fluid and the periphery of the shaft, and a high pressure side, which includes a discharge chamber of the gear pump allowing the fluid to be discharged therein;wherein the seal mechanism comprises: an annular rubber member for sealing between the low pressure side and the high pressure side while surrounding the low pressure side; an outer member having one seal surface abutting against the annular rubber member and the other seal surface abutting against one axial end face of the outer gear and also against one axial ...

Variable displacement gear pump

A variable displacement gear pump comprises a fixed gear, a movable gear movable, a fixed gear ring fitted over the movable gear, a movable gear ring fitted over the fixed gear, a fixed cover having a hole in which the fixed gear ring rotates, a movable cover having a hole in which the movable gear ring rotates, a fixed gear block attached to the fixed cover, and a movable gear block attached to the movable cover. The fixed gear is engaged with the movable gear. The movable gear ring rotates in the hole of the movable cover, and the fixed gear ring rotates in the hole of the fixed cover. The movable gear, together with the movable cover, the movable gear, and the movable gear block, move along the direction of the shaft to change a width in which the fixed gear is engaged with the movable gear.

Variable displacement gear pump

A variable displacement gear pump comprises a fixed gear, a movable gear movable, a fixed gear ring fitted over the movable gear, a movable gear ring fitted over the fixed gear, a fixed cover having a hole in which the fixed gear ring rotates, a movable cover having a hole in which the movable gear ring rotates, a fixed gear block attached to the fixed cover, and a movable gear block attached to the movable cover. The fixed gear is engaged with the movable gear. The movable gear ring rotates in the hole of the movable cover, and the fixed gear ring rotates in the hole of the fixed cover. The movable gear, together with the movable cover, the movable gear, and the movable gear block, move along the direction of the shaft to change a width in which the fixed gear is engaged with the movable gear.

PUMP UNIT AND ACTUATOR

There is provided a pump unit capable of shortening the overall length thereof and maintaining mechanical efficiency even after long-term use and also to provide an actuator having such a pump unit, the pump unit (U) includes a hydraulic pump (P), a motor (M), a coupling () coupling a drive shaft () of the hydraulic pump (P) and a shaft () of the motor (M), a holder (H) having a housing portion (L) that is hollow and houses the coupling (), and an introduction passage (D) that guides the hydraulic oil to the housing part (L). 1. A pump unit comprising:a hydraulic pump;a motor;a coupling coupling a drive shaft of the hydraulic pump and a shaft of the motor; anda holder holding the hydraulic pump and the motor and having a housing portion that is hollow and houses the coupling,wherein the holder is provided with an introduction passage that guides hydraulic oil to the housing portion.2. The pump unit according to claim 1 ,wherein the introduction passage is connected to a suction port of the hydraulic pump.3. The pump unit according to claim 2 ,wherein the introduction passage connects a tank that stores the hydraulic oil to the suction port in order to supply the hydraulic oil to the hydraulic pump, andthe housing portion is provided between the suction port and the tank in the middle of the introduction passage.4. The pump unit according to claim 1 ,wherein the coupling is cylindrical and has either a plurality of spline grooves and a plurality of serration grooves provided in an inner periphery from one end to the other end along an axial direction in a seamless manner, andthe drive shaft and the shaft have either a plurality of spline teeth fitted to the spline grooves or a plurality of serrated teeth fitted to the serration grooves, and are fitted to the inner periphery of the coupling.5. The pump unit according to claim 1 ,wherein a protruding member protruding inwardly is provided in the middle of the inner periphery of the coupling.6. An actuator comprising:{' ...

Gear Pump Bearing Dam

The subject matter of this specification can be embodied in, among other things, a method that includes a gear pump includes gears having a gear root diameter and teeth having an addendum and pressure angle. A housing includes a fluid inlet and discharge, bearings configured to position the gear teeth in intermeshing contact across a fluid dam. The fluid dam includes a first face arranged at an angle to a split line, spaced apart from a center line at the split line a first distance towards the inlet, and extending from the first gear root diameter away from the center line to the first gear root diameter, and a second face arranged approximately perpendicular to the split line, spaced apart from the center line at the split line a second distance towards the outlet, and extending between the first gear root diameter and the second gear root diameter. 1. A gear pump comprising:a first gear having a first axis, a first gear root diameter, and a plurality of first gear teeth having a gear addendum and a gear set pressure angle;a second gear having a second axis, a second gear root diameter, and a plurality of second gear teeth having the gear addendum and the gear set pressure angle; a fluid inlet and a fluid discharge;', 'a first gear bearing and a second gear bearing configured to position the first gear and the second gear along a bearing center line extending between the first axis and the second axis on opposite sides of a bearing split line, the bearing split line extending through a midpoint between the first gear root diameter and the second gear root diameter and extending perpendicular to the bearing center line, the first gear bearing and the second gear bearing configured to position the first gear teeth and second gear teeth in intermeshing contact; and,', a first face arranged at an angle to the bearing split line, spaced apart from the bearing center line at the bearing split line a first distance towards the fluid inlet, formed as a straight edge ...

High-Pressure Pump for Use in a High-Pressure Press

A high-pressure pump comprising an elongated casing and a hollow interior formed along a central axis thereof. At least one partition may be axially fixed within the elongated casing such that it divides the hollow interior. First and second pressure differential devices may be disposed on opposite sides of the at least one partition and each have a rotary shaft extending there through. A first rotary shaft extending through the first pressure differential device may be axially fixed by the at least one partition and rotationally fixed to a second rotary shaft extending through the second pressure differential device. The high-pressure pump may be driven by a servomotor and used in a high-pressure press. 1. A high-pressure pump , comprising:an elongated casing comprising a hollow interior formed along a central axis;at least one partition axially fixed within the elongated casing and dividing the hollow interior;a first pressure differential device disposed on one side of the at least one partition and a second pressure differential device disposed on an opposite side; anda first rotary shaft extending through the first pressure differential device, axially fixed by the at least one partition, and rotationally fixed to a second rotary shaft extending through the second pressure differential device.2. The high-pressure pump of claim 1 , wherein the first rotary shaft comprises a male spline end mating with a female spline end of the second rotary shaft.3. The high-pressure pump of claim 1 , wherein the first rotary shaft mates with the second rotary shaft through a coupling.4. The high-pressure pump of claim 1 , wherein each of the first and second pressure differential devices comprises a solitary positive displacement gear pump.5. The high-pressure pump of claim 1 , wherein each of the first and second pressure differential devices comprises a plurality of positive displacement gear pumps.6. The high-pressure pump of claim 1 , wherein the at least one partition ...

Gear Pump That Removes Air From Pumped Oil

A gear pump can be equipped in an engine oil system. The gear pump has a housing, a first gear, and a second gear. The housing has an outlet passage for exiting oil, and has one or more outlet openings for exiting air. The first gear has a set of first teeth with multiple first roots and first tips. The second gear has a set of second teeth with multiple second roots and second tips. The outlet opening(s) is situated in the housing so that it can communicate with a first clearance, with a second clearance, or with both the first and second clearances. The first clearance is established at the confrontation of one of the first roots and one of the second tips. And the second clearance is established at the confrontation of one of the second roots and one of the first tips. 1. A gear pump , comprising:a housing having an outlet passage for oil to exit the gear pump, the housing having at least one outlet opening for air to exit the gear pump;a first gear disposed within the housing, the first gear having a set of first teeth with a plurality of first roots and a plurality of first tips; anda second gear disposed within the housing, the second gear having a set of second teeth with a plurality of second roots and a plurality of second tips;wherein the at least one outlet opening is situated at a location in the housing to communicate with a first clearance established between a confronting first root and second tip, or with a second clearance established between a confronting second root and first tip, or with both the first clearance and the second clearance upon respective establishment thereof.2. The gear pump of claim 1 , wherein the at least one outlet opening is situated at a timing rib of the housing claim 1 , the timing rib being interposed between a vacuum side of the gear pump and a pressure side of the gear pump.3. The gear pump of claim 1 , wherein the at least one outlet opening is situated adjacent a first tip circumference of the plurality of first tips ...

EQUAL-WALLED GEROTOR PUMP FOR WELLBORE APPLICATIONS

One example of a gerotor pump includes an inner rotor comprising multiple teeth, the inner rotor configured to rotate about a first longitudinal gerotor pump axis. The gerotor pump also includes a hollow outer rotor including an outer surface and an inner surface having substantially identical contours, the inner surface configured to engage with the multiple teeth and to rotate about a second longitudinal gerotor pump axis. The pump includes a pump housing within which the inner rotor and the outer rotor are disposed, wherein the outer surface of the outer rotor defines gaps between the pump housing and the outer rotor. 1. A method comprising: an inner rotor comprising a plurality of teeth, the inner rotor configured to rotate about a first longitudinal gerotor pump axis; and', 'a hollow outer rotor comprising an outer surface and an inner surface having substantially identical contours, the inner surface configured to engage with the plurality of teeth and to rotate about a second longitudinal gerotor pump axis; and, 'positioning a gerotor pump in a wellbore, the gerotor pump comprisingpumping wellbore fluid through the wellbore using the gerotor pump.2. The method of claim 1 , wherein the gerotor pump comprises a pump housing within which the inner rotor and the outer rotor are disposed claim 1 , wherein the outer surface of the outer rotor defines gaps between the pump housing and the outer rotor claim 1 , and wherein the method further comprises flowing fluid through the gaps.3. The method of claim 1 , wherein the fluid comprises wellbore fluid.4. The method of claim 1 , wherein the fluid comprises cooling fluid.5. The method of claim 1 , wherein a direction of flow of the cooling fluid in the gaps is either concurrent with or counter-current to a direction of flow of the wellbore fluid through the pump.6. The method of claim 1 , wherein positioning the gerotor pump in the wellbore comprises positioning the gerotor pump downhole inside the wellbore.7. The ...

Internal gear pump

An internal gear pump for a hydraulic vehicle brake system includes a bearing formed for a pump shaft in a tubular form. The bearing is integrally formed with a housing of the internal gear pump. The bearing is configured to mount a pinion of the internal gear pump rotatably on the bearing. The internal gear pump also includes a catch configured to connect the pinion to the pump shaft for conjoint rotation.

GEAR PUMP

A gear pump having a suction port, first and second discharge ports, an inner rotor having external teeth, an outer rotor having internal teeth such that the number of the internal teeth is larger than that of the external teeth of the inner rotor, and inter-tooth chambers defined by the external teeth and the internal teeth. The first and second discharge ports are in communication with the inter-tooth chamber whose volume is decreased along with rotation of the inner rotor etc. An inter-tooth chamber which has been brought out of communication with the second discharge port is brought into communication with the suction port while the volume is decreasing. The volume of the inter-tooth chamber which has been brought out of communication with the second discharge port is increased after at least a part of the inter-tooth chamber has been brought into communication with the suction port. 1. A gear pump including a suction port , a discharge port , an inner rotor having a plurality of external teeth , an outer rotor which has a plurality of internal teeth such that the number of the internal teeth is larger than that of the external teeth of the inner rotor and which is disposed eccentrically with respect to the inner rotor , and a plurality of inter-tooth chambers defined by the plurality of external teeth and the plurality of internal teeth ,wherein the discharge port is in communication with the inter-tooth chamber, whose volume is decreased along with rotation of the inner rotor and the outer rotor, the inter-tooth chamber which has been brought out of communication with the discharge port is brought into communication with the suction port while the volume of the inter-tooth chamber is decreasing, and the volume of the inter-tooth chamber which has been brought out of communication with the discharge port is increased after at least a part of the inter-tooth chamber has been brought into communication with the suction port.2. The gear pump according to claim 1 , ...

PLATE GEAR PUMP AND HYDRAULIC CENTERING PINS

A lightweight gear pump easy to manufacture, having a reduced manufacturing cost, while giving sufficient performances. It consists of: A gear, three metal plates, placed on each other, an intermediate plate of which including an eight-shaped cavity adapted to house the gear, and two peripheral plates having the function of enclosing the gear in the cavity, a circuit for fluid supply to the gear, centering means to align the three plates above each other, the three metal plates being provided with centering holes in the axial direction, adapted to receive the centering means, the device according to the invention is particularly intended for liquid transfer applications for automobiles or heavy trucks. 1. A gear pump includingA gear,Three metal plates, placed on each other, an intermediate plate of which including an eight-shaped cavity adapted to house the gear, and two peripheral plates having the function of enclosing the gear in the cavity,A circuit for fluid supply to the gear,Centering means to align the three plates above each other,The three metal plates being provided with centering holes in the axial direction, adapted to receive the centering means, the gear pump being characterized in thatThe intermediate plate is provided with openings enabling said fluid supply circuit between the centering holes and the eight-shaped cavity, a first flange made of plastic material adapted to receive the three metal plates and including a pipe for the inlet and the outlet of the fluid of the gear,', 'a second flange made of plastic material including the centering means adapted to align the centering holes in the three plates, these centering means being adapted to at least partially form said fluid circuit with the cavity housing the gear and the inlet and outlet pipe in the first flange, and', 'fastening means to fasten the first flange to the second flange in order to enclose the three metal plates., 'the pump also comprising2. The gear pump according to claim 1 , ...

PUMP INTEGRATED WITH TWO INDEPENDENTLY DRIVE PRIME COVERS

A pump having at least two fluid drivers and a method of delivering fluid from an inlet of the pump to an outlet of the pump using the at least two fluid drivers. Each of the fluid drives includes a prime mover and a fluid displacement member. The prime mover drives the fluid displacement member to transfer fluid. The fluid drivers are independently operated. However, the fluid drivers are operated such that contact between the fluid drivers is synchronized. That is, operation of the fluid drivers is synchronized such that the fluid displacement member in each fluid driver makes contact with another fluid displacement member. The contact can include at least one contact point, contact line, or contact area. 188.-. (canceled)89. A pump comprising:a casing defining an interior volume, the casing including a first port in fluid communication with the interior volume, and a second port in fluid communication with the interior volume;a first gear disposed within the interior volume, the first gear having a first gear body and a plurality of first gear teeth;a second gear disposed within the interior volume, the second gear having a second gear body and a plurality of second gear teeth projecting radially outwardly from the second gear body, the second gear is disposed such that a second face of at least one tooth of the plurality of second gear teeth aligns with a first face of at least one tooth of the plurality of first gear teeth;a first motor that rotates the first gear about a first axial centerline of the first gear in a first direction to transfer a fluid from the first port to the second port; anda second motor that rotates the second gear, independently of the first motor, about a second axial centerline of the second gear in a second direction to contact the second face with the first face and to transfer the fluid from the first port to the second port,wherein the first motor is an outer-rotor motor disposed in the interior volume and comprising a first rotor ...

Gear Wheel with Profile Capable of Meshing with Semi-Encapsulation in a Geared Hydraulic Apparatus

A gear wheel comprising a plurality of helical teeth, each helical tooth of the gear wheel having a tooth profile meshing with semi-encapsulation in a geared hydraulic apparatus. Each tooth having a profile which falls within a band of tolerance of +− 1/15 of the depth of a nominal tooth defined by a spline function interpolating a plurality of node points having pre-established coordinates {X,Y} with their origin on the gear wheel center. 2. The gear wheel according to claim 1 , wherein the spline function is a cubic natural spline function which is continuous and smooth.3. The gear wheel according to claim 1 , wherein the gear wheel claim 1 , when meshing with a mating gear wheel claim 1 , has a transverse contact ratio comprised between 0.4 and 1.2.4. The gear wheel according to claim 3 , wherein the transverse contact ratio is comprised between 0.7 and 1.1.5. The gear wheel according to claim 3 , wherein the transverse contact ratio is comprised between 0.9 and 1.6. The gear wheel according to claim 3 , wherein the transverse contact ratio is equal to one.7. The gear wheel according to claim 1 , wherein the gear wheel has a ratio between dimensions of face width and pitch circle comprised between 0.5 and 2.8. The gear wheel according to claim 7 , wherein the ratio between dimensions of face width and pitch circle is comprised between 0.7 and 1.25.9. The gear wheel according to claim 7 , wherein the ratio between dimensions of face width and pitch circle is equal to one.10. The gear wheel according to claim 1 , wherein the band of tolerance is of ± 1/20 of the depth of the nominal tooth profile obtained with the spline function.11. The gear wheel according to claim 1 , wherein the band of tolerance is of ± 1/30 of the depth of the nominal tooth profile obtained with the spline function.13. The geared hydraulic apparatus according to claim 12 , wherein the hydraulic apparatus is a hydraulic pump.14. The geared hydraulic apparatus according to claim 12 , wherein ...

MELT PUMPS FOR PRODUCING SYNTHETIC GRANULES, EXTRUDED PROFILES OR MOLDED PARTS

Melt pumps for producing synthetic granules, extruded profiles or molded parts are disclosed. One disclosed example melt pump for building up pressure at a fluid medium is to be used for pressing the medium through a tool. The example melt pump includes a compressor that comprises an inlet and an outlet opening, and at least two worm conveyors disposed in a common housing, where worm flights provided on the worm conveyors are configured in such a manner that a force feed of the medium occurs and where the worm conveyors are drivable by their own drive. 1. A melt pump for building up pressure at a fluid medium , the melt pump for pressing the medium through a tool , comprising:a compressor that comprises an inlet and an outlet opening; andat least two worm conveyors disposed in a common housing, wherein worm flights provided on the worm conveyors are configured in such a manner that a force feed of the medium occurs and wherein the worm conveyors are drivable by their own drive.2. The melt pump as defined in claim 1 , wherein the worm conveyor is configured to have a ratio between the outward diameter (D) and the core diameter (D) is approximately between 1.6 and 2.4.3. The melt pump as defined in claim 1 , wherein the worm flight has a rectangular or trapeze-shaped thread profile.4. The melt pump as defined in claim 3 , wherein the worm flight has a profile angle approximately between 0° and 20°.5. The melt pump as defined in claim 1 , wherein the two worm conveyors are disposed vertically relative to one another.6. The melt pump as defined in claim 1 , further comprising a gear provided between the drive and the compressor claim 1 , wherein the worm conveyors are synchronously drivable.7. The melt pump as defined in claim 6 , wherein the drive and the gear have a rotation speed of the worm conveyors between approximately 30 rpm and 300 rpm.8. The melt pump as defined in claim 1 , wherein the worm flights and the worm conveyors are configured so that they correspond ...

REDUCTION OF CAVITATION IN FUEL PUMPS

A fluid gear pump gear arranged to rotate about a first axis includes a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion, the first hub portion and the first teeth being formed of a ceramic material. The gear also includes a first shaft on which the first hub portion is carried. 1. A fluid gear pump comprising:a first gear constructed and arranged to rotate about a first axis, the first gear including a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion, the first hub portion and the first teeth being formed of a ceramic material;a second gear operably coupled to the first gear for rotation about a second axis, the second gear including a concentrically disposed second hub portion and a plurality of second teeth radially projecting and circumferentially spaced about the second hub portion, wherein at a time in operation the plurality of first teeth and the plurality of second teeth contact at first contact point and a second contact point to create a backlash volume interposed between the first contact point and the second contact point;a first bearing abutting and coaxial to the first hub portion; anda second bearing abutting and coaxial to the second hub portion.2. The fluid gear pump as set forth in claim 1 , wherein the first gear is formed of a silicon-aluminum-oxygen-nitrogen (SiAlON) ceramic.3. The fluid gear pump as set forth in claim 2 , wherein the second gear is formed of a SiAlON ceramic.4. The fluid gear pump as set forth in claim 1 , wherein the first gear is formed of partially stabilized zirconia.5. The fluid gear pump as set forth in claim 4 , wherein the partially stabilized zirconia is doped with yttrium.6. The fluid gear pump set forth in claim 1 , further comprising:a first shaft on which the first gear is carried; anda second shaft on which the ...

REDUCTION OF CAVITATION IN FUEL PUMPS

A fluid gear pump gear arranged to rotate about a first axis. The fluid gear pump gear includes a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion, the first hub portion and the first teeth being coated with a vapor-deposited of cavitation resistant coating. The gear also includes a first shaft on which the first hub portion is carried. 1. A fluid gear pump comprising:a first gear constructed and arranged to rotate about a first axis, the first gear including a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion, the first teeth being coated with a vapor-deposited of cavitation resistant coating;a second gear operably coupled to the first gear for rotation about a second axis, the second gear including a concentrically disposed second hub portion and a plurality of second teeth radially projecting and circumferentially spaced about the second hub portion, wherein at a time in operation the plurality of first teeth and the plurality of second teeth contact at first contact point and a second contact point to create a backlash volume interposed between the first contact point and the second contact point;a first bearing abutting and coaxial to the first hub portion; anda second bearing abutting and coaxial to the second hub portion.2. The fluid gear pump as set forth in claim 1 , wherein the coating is deposited by filter arc deposition.3. The fluid gear pump as set forth in claim 2 , wherein the coating is nickel titanium (NiTi).4. The fluid gear pump as set forth in claim 1 , wherein the coating is deposited by chemical vapor deposition (CVD) or physical vapor deposition (PVD).5. The fluid gear pump as set forth in claim 4 , wherein the coating is at least one of titanium nitride claim 4 , titanium aluminium nitride (TiAlN) claim 4 , titanium aluminum silicon nitride or ...

Oil pump

An oil pump includes: an inner rotor including external teeth; an outer rotor including internal teeth; a housing configured to accommodate the inner and outer rotors; an inlet port formed in the housing and configured to guide oil into a pump chamber between the external and internal teeth; an outlet port formed in the housing and configured to guide the oil to the outside of the pump chamber; and a discharge hole formed in the housing and configured to guide bubbles in the oil to the outside of the pump chamber. The discharge hole communicates with the pump chamber earlier than a timing when the pump chamber and the outlet port communicate with each other. The outlet port communicates with the pump chamber later than a timing when the pump chamber has a maximum volume.

GEAR PUMP

A gear pump has first and second meshing gears for pumping a fluid. The gear pump further has a first electrical motor having a first rotor, a first stator and first coil windings. The gear pump further has a second electrical motor having a second rotor, a second stator and second coil windings. The first rotor is operatively connected to the first gear and the second rotor is operatively connected to the second gear such that each gear is rotated by its respective rotor. The first and second coil windings are energised by respective and separate first and second electrical power circuits such that the first and second meshing gears can be driven independently of each other. 1. A gear pump having:first and second meshing gears for pumping a fluid;a first electrical motor having a first rotor, a first stator and first coil windings; anda second electrical motor having a second rotor, a second stator and second coil windings;wherein the first rotor is operatively connected to the first gear and the second rotor is operatively connected to the second gear such that each gear is rotated by its respective rotor;wherein the first and second coil windings are energised by respective and separate first and second electrical power circuits such that the first and second meshing gears can be driven independently of each other;wherein the first rotor and the first gear are mounted, axially spaced from each other, on a first gear shaft, and the second rotor and the second gear are mounted, axially spaced from each other, on a second gear shaft; andwherein the pump is configured such that the electrical motors are cooled by a cooling flow formed from a flow of the pumped fluid.2. A pump according to claim 1 , wherein the first and second electrical power circuits each include a respective variable frequency motor drive.3. A pump according to claim 1 , wherein the electrical motors are fully immersed in the fluid.4. A pump according to claim 1 , further having a control unit ...

VOLUMETRIC GEAR MACHINE WITH HELICAL TEETH

A volumetric gear machine interacting with a working fluid comprising: —a first toothed wheel () with helical teeth comprising a first tooth () in turn comprising a first and a second flank () opposite each other; —a second toothed wheel () with helical teeth having two opposite flanks, the first and the second wheel () being operatively coupled in a meshing area (). At a portion of the meshing area (), the first and the second flank () being in simultaneous contact with the second wheel (). 110-. (canceled)12. The machine according to claim 11 , characterised in that the displacement is greater than half of the angular pitch.13. The machine according to claim 11 , characterised in that:{'br': None, 'i': 'TR−εEL≤', '0.5≤ε1.'}14. The machine according to claim 11 , characterised in that{'br': None, 'i': 'TR−εEL≤', '0≤ε0.5.'}15. The machine according to claim 11 , characterised in that:{'br': None, 'i': 'TR−εEL≥', 'ε0.'}1634. The machine according to claim 11 , characterised in that it is a gear pump claim 11 , all the teeth of the first toothed wheel () meshing in double contact with the teeth of the second wheel ().173113124. The machine according to claim 11 , characterised in that at least one portion of the first and second flank ( claim 11 , ) being involutes of a circle; at least one portion of the flanks of the helical teeth of the second toothed wheel () being involutes of a circle.1831131331431331533143231133313233431331644. The machine according to claim 17 , characterised in that said involute portion of the first flank () extends between a first and a second edge ( claim 17 , ) claim 17 , the first edge () being radially close to a rotation axis () of the first toothed wheel () with respect to the second edge (); the helical teeth of the first wheel comprising a second tooth () consecutive to the first one and facing the first flank (); a first compartment () being afforded as the space interposed between the first tooth () and the second tooth (); in a ...

STATOR AND ROTOR PROFILE FOR IMPROVED POWER SECTION PERFORMANCE AND RELIABILITY

A progressing cavity pump or a positive displacement motor includes an external member having three or more lobes and an internal member extending through the external member and having one less lobe than the external member. One of the internal member and the external member rotates with respect to the other. The curvature of a profile of each of the internal member and external member is finite at all points. A ratio of a lobe volume of the external member to a valley volume of the external member enclosed between a minor external member diameter and a major external member diameter is between 0.9 and 1.2. A lobe height of the external member is related to a ratio of a minor internal member diameter to one less than the number of internal member lobes. 1. A progressive cavity pump or a positive displacement motor comprising:an external member comprising three or more lobes; andan internal member extending through the external member and comprising one less lobe than the external member,wherein one of the internal member and the external member rotates with respect to the other,wherein a curvature of a profile of each of the internal member and external member is finite at all points,wherein a ratio of a lobe volume of the external member to a valley volume of the external member enclosed between a minor external member diameter and a major external member diameter is between 0.9 and 1.2, andwherein a lobe height of the external member is related to a ratio of its minor member diameter to one less than the number of member lobes.2. The progressive cavity pump or positive displacement motor of claim 1 , wherein the lobe height of the external member is between 0.95 and 1.05 times the ratio.3. The progressive cavity pump or positive displacement motor of claim 1 , wherein a convexity of the external member profile increases from a peak tip to an inflection point and has a finite maximum near the inflection point.4. The progressive cavity pump or positive displacement ...

Drive Assembly for a Rotary Fluid Pressure Device

A rotary fluid pressure device includes a housing section defining an inlet port and a return port. A valving assembly is in fluid communication with the inlet port and the return port. A first fluid meter defines a plurality of volume chambers that are in fluid communication with the valving assembly. A second fluid meter defines a second plurality of volume chambers in selective fluid communication with the valving assembly. A drive assembly is engaged with the first fluid meter and the second fluid meter. The drive assembly has a drive shaft and a drive collar. The drive shaft has a first axial end portion engaged with the first fluid meter and an oppositely disposed second axial end portion, the drive collar is removably coupled to the second axial end portion of the drive shaft. The drive collar is engaged with the second fluid meter.

Oil pump

An oil pump includes: an inner rotor having external teeth; an outer rotor having internal teeth engaging with the external teeth; a housing that houses the inner and outer rotors; a suction port formed in the housing and guiding oil into a pump chamber; a discharge port formed in the housing and guiding the oil to outside the pump chamber; and a discharge passage through which the pump chamber and an outside area communicate with each other and that discharges a bubble in the oil inside the pump chamber to the outside area. A bubble accommodation portion having a recess shape is formed in a side surface portion of each of the external teeth on a side opposite to a rotation direction of the inner rotor.

External Gear Pump Integrated with Two Independently Driven Prime Movers

A pump includes a casing defining an interior volume. The pump casing includes at least one balancing plate that can be part of a wall of the pump casing with each balancing plate including a protruding portion having two recesses. Each recess is configured to accept one end of a fluid driver. The balancing plate aligns the fluid displacement members with respect to each other such that the fluid displacement members can pump the fluid when rotated. The balancing plates can include cooling grooves connecting the respective recesses. The cooling grooves ensure that some of the liquid being transferred in the internal volume is directed to bearings disposed in the recesses as the fluid drivers rotate. 1. A pump with self-aligning casing , comprising: an inlet port that provides fluid communication with the interior volume,', 'an outlet port that provides fluid communication with the interior volume,', 'a first protruded portion extending toward the interior volume, the first protruded portion having a first land and first and second recesses,', 'a second protruded portion extending toward the interior volume and opposing the first protruded portion, the second protruded portion having a second land and third and fourth recesses, the first and second protruded portions disposed such that the first land and the second land confront each other and are spaced apart to define a gap;, 'a casing defining an interior volume, the casing including,'} a first support shaft supported by the casing, and', 'a first motor casing housing a first stator and a first rotor and fixedly connected to the first rotor, which drives the first motor casing in a first rotational direction, the first motor casing at least partially disposed in the first recess and the third recess, and', 'a first gear having a plurality of first gear teeth fixedly connected to and projecting radially outwardly from the first motor casing, the first gear teeth disposed in the gap; and, 'a first fluid driver, the ...

GEAR PUMP WITH DEFLECTOR IN FLUID INTAKE FOR DIVERTING FLUID TOWARDS VOIDS IN HOUSING

In accordance with one embodiment, the gear pump comprises a first gear meshed with a second gear as well as a housing, in which the gears are supported. The housing includes a first void, which at least partly adjoins a first side surface of the first gear, and a second void, which at least partly adjoins a second side surface of the first gear. The gear pump further comprises a fluid intake channel configured to direct fluid towards the gears, wherein at least one deflector is arranged within the fluid intake such that an incident fluid flow is diverted towards the first void as well as to the second void. 1. An external gear pump comprising:a first external gear meshed with a second external gear;a housing, in which the gears are supported, wherein the housing includes a first void, which at least partly adjoins a first side surface of the first external gear, and a second void, which at least partly adjoins a second side surface of the first external gear;a fluid intake channel configured to direct fluid towards the gears; andat least one deflector arranged within the fluid intake channel such that an incident fluid flow is diverted towards the first void as well as to the second void.2. The external gear pump according to claim 1 ,wherein the deflector is shaped and positioned such that the incident fluid flow is split into a first portion and at least a second portion, wherein the first portion of the fluid flow is diverted towards the first void and the second portion of the fluid flow is diverted towards the second void.3. The external gear pump according to claim 2 , further comprising a further deflector arranged such so as to guide the first portion of the fluid flow towards the first void.4. The external gear pump according to claim 1 ,wherein the first void is formed by a recess formed in an inner surface of a cover of the housing.5. The external gear pump according to claim 1 , wherein the second void is formed by a recess formed in an inner surface of ...

Oil pump

An oil pump having a pump housing with a suction-side inlet and with a pressure-side first outlet, which is coupled to a first pump chamber, and with a pressure-side second outlet, which is coupled to a second pump chamber having a first pump rotor which is situated in the first pump chamber so as to be rotatable about a first axis, and having a second pump rotor which is situated in the second pump chamber so as to be rotatable about a second axis, wherein the pump rotors are arranged in a plane, oriented substantially perpendicular to the axes of the pump housing and are coupled by way of an external circumferential toothing.

HOLLOW ROTOR LOBE AND CONTROL OF TIP DEFLECTION

A rotor comprises a central body configured to rotate. A lobe extends perpendicularly from the central body along an lobe axis. A curved leading periphery and a curved trailing periphery are on opposite sides of the lobe axis. A V-shaped rib spans between the curved leading periphery and the curved trailing periphery. A first hollow space is bounded by the V-shaped rib, the curved leading periphery, and the curved trailing periphery. The first hollow space is distal with respect to the central body along the lobe axis. A second hollow space is bounded by the V-shaped rib, the central body, the curved leading periphery, and the curved trailing periphery. The second hollow space is proximal with respect to the central body along the lobe axis. The rotor can comprise a plurality of stacked, stamped sheets to form a helically twisted supercharger rotor. 1. A rotor comprising:a central body configured to rotate; a curved leading periphery on a first side of the lobe axis;', 'a curved trailing periphery on a second side of the lobe axis;', 'a V-shaped rib spanning between the curved leading periphery and the curved trailing periphery;', 'a first hollow space bounded by the V-shaped rib, the curved leading periphery, and the curved trailing periphery, the first hollow space distal with respect to the central body along the lobe axis; and', 'a second hollow space bounded by the V-shaped rib, the central body, the curved leading periphery, and the curved trailing periphery, the second hollow space proximal with respect to the central body along the lobe axis., 'a lobe extending from the central body, the lobe comprising: an lobe axis perpendicular to the central body;'}2. The rotor of claim 1 , wherein the V-shaped rib comprises: periphery distal with respect to the central body along the lobe axis; and a second arm extending from the vertex to connect to the curved trailing', 'periphery distal with respect to the central body along the lobe axis., 'a vertex proximal with ...

Internal Gear Pump for a Hydraulic Vehicle Brake System and Method for Producing the Internal Gear Pump

An internal gear pump for a hydraulic vehicle brake system includes a pump shaft, a pinion, a ring gear, a first axial plate, and a second axial plate. The pinion is disposed on the pump shaft, is configured to rotate conjointly therewith, and is arranged eccentrically within the ring gear so as to mesh therewith. The first and second axial plates are adjacent to the pinion and the ring gear. A toothing on at least one of the ring gear and the pinion is configured such that an axial width of a root of a respective tooth is greater than an axial width of a crest of the respective tooth. A corresponding method relates to producing such an internal gear pump.

GEAR PUMP HAVING GROOVED MOUNTING ADAPTER

A mounting adapter is disclosed for use with a gear pump. The mounting adapter may have a generally plate-like base member, and inlet and outlet ports both formed in the base member. The mounting adapter may also have a first bearing bore formed in the base member between the inlet port and the outlet port and configured to receive a first gear shaft, and a first bleed groove formed in the base member adjacent the outlet port. The first bleed groove may be generally concentric with the first bearing bore. The mounting adapter may further have a second bearing bore formed in the base member between the inlet port and the outlet port and configured to receive a second gear shaft, and a second bleed groove formed in the base member adjacent the outlet port. The second bleed groove may be generally concentric with the second bearing bore. 1. A mounting adapter for a gear pump , comprising:a generally cylindrical base member;a generally plate-like mounting flange connected to one end of the base member;an inlet port formed in the base member;an outlet port formed in the base member;a first bearing bore formed in the base member between the inlet port and the outlet port and configured to receive a first gear shaft;a first bleed groove formed in the base member adjacent the outlet port, the first bleed groove being generally concentric with the first bearing bore;a second bearing bore formed in the base member between the inlet port and the outlet port and configured to receive a second gear shaft; anda second bleed groove formed in the base member adjacent the outlet port, the second bleed groove being generally concentric with the second bearing bore.2. The mounting adapter of claim 1 , wherein the first and second bleed grooves each have a generally constant cross-section along their lengths.3. The mounting adapter of claim 2 , wherein the first and second bleed grooves have generally square cross-sections and an arc length of about 70-75°.4. The mounting adapter of ...

Device and system for the pressurization of a fluid, and corresponding use

An apparatus and a system for application of pressure to a fluid, as well as a corresponding use. The apparatus includes an introduction port for introducing the fluid into the apparatus; a cooling apparatus port and an outlet port; a controllable first valve device having an adjustable first opening pressure value; a second valve device having a second opening pressure value; a controllable third valve device having an adjustable third opening pressure value; the first valve device and the third valve device being automatically controllable for simultaneous application to the fluid of the first predefinable pressure value for output at the outlet port and of the second predefinable pressure value for output at the cooling apparatus port.

Horizontal and vertical well fluid pumping system

A method of producing fluids includes isolating a vertical section of a wellbore from a horizontal section; isolating the production tubing from the reservoir; pumping fluid from the reservoir adjacent a toe segment into a production tubing toe segment and towards the heel segment; and pumping fluid from the reservoir adjacent a heel segment into the production tubing heel segment and towards the vertical section, and pumping fluid up the vertical section to the surface. Also disclosed is a diaphragm pump.

PUMP PARTICULARLY FOR PUMPING A LIQUID SUCH AS INK, PAINT, GLUE OR THE LIKE

A pump particularly for pumping a liquid such as ink, paint, glue or the like, includes at least one rotating pumping member having a respective shaft. The at least one rotating pumping member being at least partially housed inside a pump body, the shaft being rotatably supported by at least one support associated with the pump body. 1. A pump for pumping a liquid , comprising at least one rotating pumping member comprising a respective shaft , said at least one rotating pumping member being at least partially housed inside a pump body , said shaft being rotatably supported by at least one support associated with said pump body , wherein said shaft comprises , on its external cylindrical surface in contact with said liquid one , or more recesses , or wherein said at least one support comprises , on its internal cylindrical surface in contact with said liquid , one or more recesses.2. The pump claim 1 , according to claim 1 , wherein said at least one support is defined by a seat obtained in said pump body or by a bearing fixed to said pump body.3. The pump claim 1 , according to claim 1 , wherein said one or more recesses are distributed at least on the portion of the external cylindrical surface of said shaft which faces the internal cylindrical surface of said at least one support claim 1 , or distributed at least on the portion of the internal cylindrical surface of said at least one support that faces the external cylindrical surface of said shaft.4. The pump claim 1 , according to claim 1 , wherein said one or more recesses are distributed over the entire external cylindrical surface of said shaft which is in contact with said liquid.5. The pump claim 1 , according to claim 1 , wherein said one or more recesses are defined by one or more facets or grooves having a mainly longitudinal development.6. The pump claim 1 , according to claim 1 , wherein said one or more recesses comprise a plurality of facets or grooves having a longitudinal development substantially ...

GEAR PUMP HAVING GROOVED MOUNTING ADAPTER

A mounting adapter is disclosed for use with a gear pump. The mounting adapter may have a generally plate-like base member, and inlet and outlet ports both formed in the base member. The mounting adapter may also have a first bearing bore formed in the base member between the inlet port and the outlet port and configured to receive a first gear shaft, and a first bleed groove formed in the base member adjacent the outlet port. The first bleed groove may be generally concentric with the first bearing bore. The mounting adapter may further have a second bearing bore formed in the base member between the inlet port and the outlet port and configured to receive a second gear shaft, and a second bleed groove formed in the base member adjacent the outlet port. The second bleed groove may be generally concentric with the second bearing bore. 1. A mounting adapter for a gear pump , comprising:a substantially cylindrical base member;a substantially plate-like mounting flange connected to one end of the base member;an inlet port formed in the base member;an outlet port formed in the base member;a first bearing bore formed in the base member between the inlet port and the outlet port and configured to receive a first gear shaft;a first bleed groove formed in the base member adjacent the outlet port, the first bleed groove being substantially concentric with the first bearing bore;a second bearing bore formed in the base member between the inlet port and the outlet port and configured to receive a second gear shaft; anda second bleed groove formed in the base member adjacent the outlet port, the second bleed groove being substantially concentric with the second bearing bore.2. The mounting adapter of claim 1 , wherein the first and second bleed grooves each have a substantially constant cross-section along their lengths.3. The mounting adapter of claim 2 , wherein the first and second bleed grooves have substantially square cross-sections and an arc length of about 70-75°.4. ...

Variable displacement gear pump

A variable displacement gear pump comprises a fixed gear, a movable gear movable, a fixed gear ring fitted over the movable gear, a movable gear ring fitted over the fixed gear, a fixed cover having a hole in which the fixed gear ring rotates, a movable cover having a hole in which the movable gear ring rotates, a fixed gear block attached to the fixed cover, and a movable gear block attached to the movable cover. The fixed gear is engaged with the movable gear. The movable gear ring rotates in the hole of the movable cover, and the fixed gear ring rotates in the hole of the fixed cover. The movable gear, together with the movable cover, the movable gear, and the movable gear block, move along the direction of the shaft to change a width in which the fixed gear is engaged with the movable gear.

Gear Pump with Dual Pressure Relief

An internal gear pump () comprises: a rotor/torque ring comprising an internally lobed () rotor () and a torque ring () extending beyond at least a first end () of the rotor; an externally lobed () idler () encircled by the rotor; a hollow shaft () supporting the idler; a pressure relief element () positioned to shift between a first condition and a second condition; and a spring () biasing the pressure relief element toward the first condition from the second condition. The torque ring has at least one pressure relief port (A, B) positioned so that: in the first condition, the pressure relief element blocks a path from an interior volume () of the pump to the pressure relief port; and in the second condition, relative to the first condition the pressure relief element does not block the path. 2. The pump of wherein:the at least one pressure relief port has an axial span (DH) greater than a thickness of an adjacent surface of the pressure relief element.3. The pump of wherein:the at least one pressure relief port comprises a pair of pressure relief ports.4. The pump of wherein:{'b': 126', '128, 'the at least one pressure relief port comprises a through-hole between an inner diameter (ID) surface () of the torque ring and an outer diameter (OD) surface () of the torque ring.'}5. The pump of further comprising:{'b': 170', '180', '180, 'a carrier () from which the shaft protrudes and having a pair of ports (A, B).'}6. The pump of further comprising a sealing sleeve having:a shoulder positioned to contact the pressure relief element; anda sidewall extending from the shoulder and surrounding a portion of the spring.7. The pump of wherein the torque ring further comprises:{'b': 230', '230', '232', '232, 'a pair of driving slots (A, B) for receiving driving pins (A, B) protruding from a drive shaft received in the torque ring first end portion.'}824100. A compressor () comprising the pump () of and further comprising:{'b': '50', 'a housing ();'}{'b': 56', '500, 'a drive ...

High-Pressure Pump for Use in a High-Pressure Press

A high-pressure pump comprising an elongated casing and a hollow interior formed along a central axis thereof. At least one partition may be axially fixed within the elongated casing such that it divides the hollow interior. First and second pressure differential devices may be disposed on opposite sides of the at least one partition and each have a rotary shaft extending there through. A first rotary shaft extending through the first pressure differential device may be axially fixed by the at least one partition and rotationally fixed to a second rotary shaft extending through the second pressure differential device. The high-pressure pump may be driven by a servomotor and used in a high-pressure press. 1. A high-pressure pump , comprising:an elongated casing comprising a hollow interior formed along a central axis;at least one partition axially fixed within the elongated casing and dividing the hollow interior;a first pressure differential device disposed on one side of the at least one partition and a second pressure differential device disposed on an opposite side; anda first rotary shaft extending through the first pressure differential device, axially fixed by the at least one partition, and rotationally fixed to a second rotary shaft extending through the second pressure differential device.2. The high-pressure pump of claim 1 , wherein the first rotary shaft comprises a male spline end mating with a female spline end of the second rotary shaft.3. The high-pressure pump of claim 1 , wherein the first rotary shaft mates with the second rotary shaft through a coupling.4. The high-pressure pump of claim 1 , wherein each of the first and second pressure differential devices comprises a solitary positive displacement gear pump.5. The high-pressure pump of claim 1 , wherein each of the first and second pressure differential devices comprises a plurality of positive displacement gear pumps.6. The high-pressure pump of claim 1 , wherein the at least one partition ...