КОЛОВРАТНЫЙ НАСОС, СПОСОБ ФИКСАЦИИ И СПОСОБ ДЕМОНТАЖА ЕГО ВРАЩАЮЩИХСЯ ПОРШНЕЙ

Brennstoffpumpe für Kraftfahrzeug

Bohrlochpumpe, Verfahren zum Installieren einer Bohrlochpumpe und Verfahren zum Auswechseln einer Bohrlochpumpe

Die Erfindung bezieht sich auf eine Bohrlochpumpe umfassend eine Exzenterschneckenpumpe mit mindestens einem Stator und mindestens einem Roto. Die Exzenterschneckenpumpe weist am oberen Endbereich jeweils eine obere Dichtungsanordnung und am unteren Endbereich jeweils eine untere Dichtungsanordnung auf. Weiterhin umfasst die Exzenterschneckenpumpe ein Aufnahmegehäuse mit einem unteren Dichtungsbereich und mindestens zwei oberen Dichtungsbereichen; wobei die Exzenterschneckenpumpe derart im Aufnahmegehäuse angeordnet ist, dass die untere Dichtungsanordnung der Exzenterschneckenpumpe form- und/oder kraftschlüssig dem unteren Dichtungsbereich des Aufnahmegehäuses zugeordnet ist, und dass die obere Dichtungsanordnung der Exzenterschneckenpumpe form- und/oder kraftschlüssig einem der mindestens zwei oberen Dichtungsbereiche des Aufnahmegehäuses zugeordnet ist.Die Erfindung bezieht sich weiterhin auf ein Verfahren zum Installieren einer Bohrlochpumpe an einem unteren Ende eines Steigrohres und ...

Pumpenvorrichtung mit einer Vielzahl von Drehkolbenpumpen und Verfahren zum Zusammenbauen der Pumpenvorrichtung

Pumpenvorrichtung, mit: einer ersten Drehkolbenpumpe (10) mit ersten Rotoren (51, 52), einer ersten zylindrischen Mittelplatte (73a), einem ersten und zweiten Zylinder (71a, 71b) und einem durch eine Anordnung der ersten zylindrischen Mittelplatte (73a) zwischen dem ersten und zweiten Zylinder (71, 71b) definierten ersten Pumpenraum (50a) zur Aufnahme der ersten Rotoren (51, 62); einer zweiten Drehkolbenpumpe (13) mit zweiten Rotoren (51, 52), einer zweiten zylindrischen Mittelplatte (73b), dem zweiten Zylinder (71b), einem dritten Zylinder (71c) und einem durch eine Anordnung der zweiten zylindrischen Mittelplatte (73b) zwischen dem zweiten und dritten Zylinder (71b, 71c) definierten zweiten Pumpenraum (50b) zur Aufnahme der zweiten Rotoren (51, 52); einer sich durch den ersten Zylinder (71a), die ersten Rotoren (51, 52), den zweiten Zylinder (71b), die zweiten Rotoren (51, 52) und den dritten Zylinder (71c) hindurch erstreckenden Antriebswelle (54) zum Antrieb der ersten und zweiten Drehkolbenpumpe ...

Drehkolbenpumpe mit magnetischer Rotorhalterung

Rotor assembly

Scroll compressor

An orbiting scroll 2 meshes with a non-orbital scroll 1 to form a compression space. A frame 3 axially supports the orbiting scroll and radially supports a drive shaft 8. A high and low pressure separator 4 is fixed to the frame 3. A seal member 10 in a clearance between the separator 4 and the non-orbital scroll 1 defines a pressure portion which presses the scroll 1 toward the scroll 2. The seal member 10 is disposed in the clearance at a position so as to lie in a plane parallel with the base plate of the non-orbital scroll 1 so that the scroll 1 is not diametrically restrained at the seal position.

Scroll compressor

METHOD AND APPARATUS FOR THE ASSEMBLY OF ROTARY COMPRESSORS FOR EXAMPLE FOR MOTOR COMPRESSOR UNITS FOR REFRIGERATORS AND THE LIKE

Bearing assembly for sealed compressor

Vacuum pump

Scroll compressor

SYSTEMS TO THE DELIVERY OF LIQUIDS

SPIRAL PUMP AND ASSEMBLY PROCEDURE FOR IT

Scroll type fluid machine

Provided is a scroll type fluid machine (1) having a tube structure (40). This tube structure (40) includes a boss (36) fitted in a through hole (4a) from the outside of a closed container (4), for forming a joint portion (42) so as to seal the through hole (4a) between itself and the closed container (4), an inner tube (38) of a copper-plated iron base material fitted in the boss (36) and inserted into a scroll unit (12), and an outer tube (8) of a copper base material fitted in the inner tube (38) and arranged to protrude from the boss (36) to the outer side of the closed container (4). The boss (36) is made of a copper-plated iron base material having an iron-exposed portion (48), in which the iron base material is exposed to the outside at the joint portion (42).

Rotary compressor

Progressing cavity pump/motor

A progressing cavity pump/motor includes a stator tube (12), a rotor (20) within the stator tube, and a coupling assembly (30) interconnecting the upper and lower rotor sections. The coupling includes a drive adapter (32) and a socket adapter (36) for transmitting torque between the upper and lower rotor sections, and at least one alignment surface (60) in cooperation with a mating surface to rotationally position the drive adapter within the socket adapter at a selected circumferential position. The pump/motor may be reliably assembled in the field while maintaining precise axial and rotational positioning of the rotor sections.

Electric pump for a hybrid vehicle

A hydraulic system for a hybrid module which is located between an engine and a transmission includes a parallel arrangement of a mechanical pump and an electric pump. Each pump is constructed and arranged to deliver oil to other portions of the hydraulic system depending on the operational mode. Three operational modes are described including an electric mode, a transition mode, and a cruise mode. Various monitoring and control features are incorporated into the hydraulic system.

Fuel pump for motor vehicle

SCROLL-TYPE MACHINE

SCROLL PUMP

SCROLL COMPRESSOR

SCROLL COMPRESSOR

A scroll compressor 40 comprises: housing 12, orbiting scroll 26 and fixed scroll 41. The drive shaft 14 has an eccentric shaft portion 18 so that rotation of the eccentric shaft portion imparts an orbiting motion to the orbiting scroll relative to the fixed scroll. Axial spacers 42 are located between the fixed scroll and the housing for spacing the fixed scroll relative to the orbiting scroll. When the scroll compressor 40 is assembled and tested and it is desired to perform shimming, the fixed scroll can be removed and a selected spacer placed in position prior to re-assembling the fixed scroll.

SCROLL TYPE FLUID MACHINE

In a scroll type fluid machine wherein there are engaged stator scroll means and rotary scroll means in intermeshing relationship with each other, each having a spiral or scroll blade portion projecting in the axial direction from the lateral plate surface in such a manner that the rotary scroll means may move in solar revolving motion with respect to the stator scroll means mounted stationary on a cup-like member by the rotating motion of a main shaft, while restricting the rotating motion of the rotary scroll means by function of a rotation blocking mechanism, so that the fluid may operatively be sucked into and delivered out of the fluid machine with a differential pressure produced therein in continued variation, an improvement is accomplished in that an angular phase relationship between the rotary scroll means and the stator scroll means may be compensated properly by shifting in rotation the scroll means in the direction of rotating motion thereof in accordance with the extent of ...

SCROLL TYPE FLUID DISPLACEMENT APPARATUS WITH IMPROVED FIXED SCROLL CONSTRUCTION

SCROLL TYPE FLUID DISPLACEMENT APPARATUS WITH IMPROVED FIXED SCROLL CONSTRUCTION A scroll type fluid displacement apparatus including an orbiting scroll and a fixed scroll, each having an end plate and a spiral element is disclosed. The spiral elements interfit at an angular and radial offset to form a plurality of line contacts between the spiral curved surfaces to define at least one pair of fluid pockets. A driving mechanism is operatively connected to the orbiting scroll for orbiting the orbiting scroll relative to the fixed scroll while preventing rotation of the orbiting scroll. This changes the volume of the fluid pockets. A plurality of threaded holes are formed through the end plate of the fixed scroll for attaching the fixed scroll to the inner end surface of projecting portions of the compressor housing. The projecting portions extend toward the fixed scroll and have threaded holes formed therein. A bolt is screwed through the fixed scroll holes and into the holes in the projecting ...

PROGRESSING CAVITY STATOR INCLUDING AT LEAST ONE CAST LONGITUDINAL SECTION

A progressing cavity stator and a method for fabricating such a stator are disclosed. Exemplary embodiments of the progressing cavity stator include a plurality of rigid longitudinal stator sections concatenated end-to-end in a stator tube. The stator sections are rotationally aligned so that each of the internal lobes extends in a substantially continuous helix from one end of the stator to the other. The stator further includes an elastomer liner deployed on an inner surface of the concatenated stator sections. Exemplary embodiments of this invention include a comparatively rigid stator having high torque output and are relatively simple and inexpensive to manufacture as compared to prior art rigid stators.

COMPRESSOR CRANKSHAFT WITH BEARING SLEEVE AND ASSEMBLY METHOD

A compressor assembly having a drive shaft supported by a main bearing and an outboard bearing located on opposite axial ends of a cylinder block. The main bearing has a bearing support formed therein in which first and second apertures are defined. The diameter of the first aperture is less than the diameter of the second aperture. The shaft extends through the first and second apertures with the diameter of the drive shaft having an outer diameter which is no greater than the diameter of the first aperture. A sleeve is mounted on the drive shaft and is at least partially disposed within the second aperture. A bearing is located in the second aperture and engages the sleeve and the main bearing to rotationally support the drive shaft. The sleeve can have a thickness which allows the bearing to be of a standard size rather than a custom size.

LOAD BALANCED POWER SECTION OF PROGRESSING CAVITY DEVICE

A progressing cavity device operates as a motor to impart torque to a bit. A stator of the device defines an internal profile having uphole stages with a first dimension being less than a second dimension of downhole stage. A rotor has an external profile with a constant outer dimension along its length. Disposed in the stator, the rotor defines cavities with the stator and is rotatable with pumped fluid progressing in the cavities from the uphole to downhole to transfer torque to the drive toward the downhole end. Although the rotor is subjected at the downhole end to a reactive torque from the bit, the interference fit of the rotor's constant dimension with the stator's downhole stages is less than with the uphole stages, which can mitigate issues with heat buildup in the downhole stages. The device can also operates as a progressing cavity pump.

PERIPHERAL SYSTEMS

A repeater system may control a pump by using a repeater and a user interface. An adhesive patch system may be used for affixing a pump or other object to a human body. Such an adhesive patch system may include two sets of adhesive members, each member including an adhesive material on at least one side so as to attach to the body. The members of the first set are spaced to allow the members of the second set to attach to the body in spaces provided between the members of the first set, and the members of the second set are spaced to allow members of the first set to detach from the body without detaching the members of the second set. Also, fill stations and base stations are provided for personal pump systems.

PERIPHERAL SYSTEMS

A repeater system may control a pump by using a repeater and a user interface. An adhesive patch system may be used for affixing a pump or other object to a human body. Such an adhesive patch system may include two sets of adhesive members, each member including an adhesive material on at least one side so as to attach to the body. The members of the first set are spaced to allow the members of the second set to attach to the boy in spaces provided between the members of the first set, and the members of the second set are spaced to allow members of the first set to detach from the body without detaching the members of the second set. Also, fill stations and base stations are provided for personal pump systems.

PUMP

A multistage pump (4) comprises: a plurality of components (50, 60, 70, 80, 90, 100, 110) comprising a plurality of pre-assembled pump modules (70, 90, 110) including at least one twin screw pump module (1, 2); characterised in that the multistage pump (4) further comprises an elongate sleeve (41) for housing the components (50, 60, 70, 80, 90, 100, 110); and securing means (42a, 42b) attachable or engagable with a portion of the elongate sleeve (41), the securing means (42a, 42b) being operable to fixedly retain the components (50, 60, 70, 80, 90, 100, 110) within the sleeve (41).

METERING GEAR PUMP OR SEGMENT, AND METERING GEAR PUMP ASSEMBLY COMPRISING A PLURALITY OF METERING GEAR PUMPS OR SEGMENTS

A metering pump or segment, and a metering pump assembly comprising a plurality of the metering pumps or segments, are disclosed. The drive shaft assembly for driving the pump gears of each metering pump or segment is coaxially aligned with the longitudinal axis of the pump or segment, as is the fluid inlet supply path, whereby only three gears are required to comprise each metering pump or segment. The single drive shaft assembly is utilized to drive all of the metering pumps or segments comprising the metering pump assembly, and the different metering pumps or segments are fluidically connected together by means of a common fluid passageway. In addition, the different metering pumps or segments can be interchanged or exchanged so as to permit different metered fluid output volumes to be outputted at different predetermined locations. Also, different metering pumps or segments can be disposed or arranged such that their metered flow output volumes can effectively be added together so as ...

AXIALLY FLOATING SCROLL MEMBER ASSEMBLY

Schraubenpumpe

НАСОС

В заявке описан многоступенчатый насос (4), содержащий множество компонентов (50, 60, 70, 80, 90, 100, 110), в том числе несколько предварительно собранных насосных модулей (70, 90, 110), включающих по меньшей мере один модуль двухвинтового насоса (1, 2), и характеризующийся тем, что этот многоступенчатый насос (4) также содержит удлиненную гильзу (41) для размещения компонентов (50, 60, 70, 80, 90, 100, 110) и средство крепления (42а, 42b) с возможностью фиксации на участке удлиненной гильзы (41) или входа в зацепление с этим участком, причем в смонтированном состоянии это средство крепления (42а, 42b) удерживает в неподвижности компоненты (50, 60, 70, 80, 90, 100, 110) внутри гильзы (41).

НАСОС

В изобретении описан многоступенчатый насос (4), содержащий множество компонентов (50, 60, 70, 80, 90, 100, 110), в том числе несколько предварительно собранных насосных модулей (70, 90, 110), включающих по меньшей мере один модуль двухвинтового насоса (1, 2), и характеризующийся тем, что этот многоступенчатый насос (4) также содержит удлиненную гильзу (41) для размещения компонентов (50, 60, 70, 80, 90, 100, 110) и средство крепления (42а, 42b) с возможностью фиксации на участке удлиненной гильзы (41) или входа в зацепление с этим участком, причем в смонтированном состоянии это средство крепления (42а, 42b) удерживает в неподвижности компоненты (50, 60, 70, 80, 90, 100, 110) внутри гильзы (41).

Fluid machine

Rotary compressor

Vortex compressor

MACHINE DU TYPE A VOLUTES, SON DISPOSITIF D'ENTRAINEMENT, ET COMPRESSEUR DE FLUIDE DU TYPE A VOLUTES

ON DECRIT UNE MACHINE DU TYPE A VOLUTES SE PRETANT PARTICULIEREMENT A UNE UTILISATION EN TANT QUE COMPRESSEUR DE REFRIGERANT 30 ET COMPORTANT UN SYSTEME DE SUSPENSION POUR LA SPIRE NON-TOURNANTE 36, PERMETTANT A CETTE DERNIERE D'ETRE SOUMISE A UNE FORCE DE PRESSION DANS LE BUT D'AUGMENTER L'ETANCHEITE DES EXTREMITES. LA MACHINE PRESENTE EGALEMENT UN PROFIL MODIFIE DES EXTREMITES DES SPIRES ET DES PLAQUES D'EXTREMITE, AFIN D'EN ACCROITRE LES PERFORMANCES, AINSI QU'UN SYSTEME DE LUBRIFICATION AMELIORE POUR LE DISPOSITIF D'ENTRAINEMENT, ET UN DISPOSITIF A CHICANE FOURNISSANT UN ORIFICE D'ADMISSION PAR ASPIRATION DIRIGEE. LA MACHINE COMPORTE EGALEMENT UN COUPLAGE DE OLDHAM 38 UTILISANT UN NOUVEL ELEMENT ANNULAIRE QUI EST NON CIRCULAIRE ET PERMET D'AUGMENTER LA TAILLE DU PALIER DE BUTEE, OU DE DIMINUER LES DIMENSIONS DE LA MACHINE. ON DECRIT EGALEMENT UN PROCEDE DE FABRICATION D'UNE MACHINE DU TYPE A VOLUTES.

MACHINE OF THE TYPE HAS SPIRAL

ASSEMBLY AND FASTENING SCREW BY SCREW COMPRISING SUCH A FASTENING SCREW

SCROLL COMPRESSOR HAVING A BASEPLATE INCLUDING FIRST AND SECOND CYLINDRICAL RIM PORTIONS

Le compresseur à spirales (2) comprend une enceinte hermétique (3) comprenant une coque médiane (4), un capuchon supérieur (5) et une plaque de base (6), la plaque de base (6) comprenant une base de montage (32) ayant une forme de plaque et comportant une ouverture centrale (33), et un capuchon central (28) agencé à l'intérieur de l'ouverture centrale (33), le capuchon central (28) comprenant une partie concave (29) et une première partie de rebord cylindrique (30) s'étendant vers le haut et ayant un diamètre extérieur correspondant sensiblement à un diamètre intérieur de la coque médiane (4) ; une unité de compression (11) configurée pour comprimer un fluide frigorigène ; et un moteur électrique (21) configuré pour entraîner l'unité de compression (11) par l'intermédiaire d'un arbre d'entraînement (19). La base de montage (32) comprend une deuxième partie de rebord cylindrique (34) s'étendant vers le haut et entourant l'ouverture centrale (33), où un diamètre intérieur de la deuxième partie ...

스크롤 타입 압축기의 자전 방지 링의 제조 방법 및 스크롤 타입 압축기의 자전 방지 기구

... 스크롤 타입 압축기의 자전 방지 링의 제조 방법으로서, 상기 자전 방지 링은 금속으로 제조되고, 그리고 가동 스크롤의 자전을 방지하는 자전 방지 기구에 제공되며, 상기 제조 방법은 바닥이 있는 원통형상의 제 1 중간체를 제조하기 위하여 프레스로 강판을 드로잉하는 단계; 제 2 중간체를 제조하기 위하여 상기 제 1 중간체의 바닥을 펀칭하는 단계; 및 상기 제 2 중간체를 링 성형하는 단계를 포함한다.

ELECTROMOTIVE FLUID COMPRESSOR

Automobile electric fuel pump

SCREW PUMP WITH FIELD REFURBISHMENT PROVISIONS FOR LOCKING PIVOTALLY SHAFT AND SCREW OF THE SCREW PUMP NOT THE KEY OR THE KEY GUIDE

PURPOSE: A screw pump with field refurbishment provisions is provided that the gap between screw and the helical axis are adjusted and the timing of the screw pump is adjusted. CONSTITUTION: A screw pump(20) comprises two or more screws, a base(26), and a shaft. The screw is expanded between the helical flight, the inner end and the outer end. The shaft copes with each screw, and it is expanded between the inner end and the outer end, and it is formed in the inner end into the cantilever shape, and comprises a core. The core accepts shaft so that the screw move by slipping on the top of the shaft. The locking mechanism is provided in the middle portion of the shaft and the screw. It locks above statement, in order to be possible to rotate in mechanism, the shaft and screw together locks without the key or the key guide. COPYRIGHT KIPO 2012 ...

ROTARY PISTON MACHINE

Proposed is an electrically driven rotary piston machine which operates as a rotary piston pump or rotary piston compressor, having a base housing (1) which holds an electric coil (2) and a pump head (3), wherein the pump working space is preferably delimited by a trochoidal toothing of the rotors (15, 17). According to the invention, the pump head (3), which can usually be produced relatively cost-effectively, is designed as a disposable part and therefore has a quick-action connection (7, 10, 11, 12, 14) to the more expensive base housing (1). © KIPO & WIPO 2009 ...

método de produzir compressor, e compressor

SCROLL-TYPE MACHINE

A scroll pump and method of assembling same

ROTOR FOR A PUMP

The invention relates to a rotor for a pump, particularly for a vacuum pump, having a bearing segment and a vane mounting segment. The invention is characterized in that the rotor comprises a clamping recess as an axial extension of a functional recess.

COMPRESSOR WITH OIL RETURN PASSAGE FORMED BETWEEN MOTOR AND SHELL

A scroll compressor that includes a shell and scroll compressor bodies disposed in the shell. The scroll bodies include a first scroll body and a second scroll body, where the first and second scroll bodies have respective bases and respective scroll ribs that project from the respective bases. The scroll ribs are configured to mutually engage, and the second scroll body is movable relative to the first scroll body for compressing fluid. A pilot ring engages a perimeter surface of the first scroll body to limit movement of the first scroll body in the radial direction. Further, the shell includes different inner diameters to facilitate press fitting a motor into the shell where the motor includes lubricant flow passages.

VALVE ASSEMBLY AND COMPRESSOR HAVING THE SAME

Disclosed are a valve assembly (100) and a compressor having the same. In the valve assembly (100) and the compressor having the same according to the present invention, the sliding valve (130) for controlling the flow direction of the liquid is made of a high-temperature proof material having good lubricity, thereby preventing the deformation or damange of the sliding valve (130) during the assembly process of the valve assembly (100) or due to the drying occurring when the compressor adapting the valve assembly (100) is dried, thus to increase the reliability of the valve assembly (100) as well as enhance the efficiency of the compressor adopting the same.

PUMP UNIT

A pump unit (1) of a vane-type pump having no dedicated housing is proposed, comprising a drive shaft (5), a rotor (7) that interacts with the drive shaft (5) and accommodates vanes (19), a contour ring (9) surrounding the rotor (7), and a first and a second side plate (11, 13) which are disposed laterally of the contour ring (9).

Low cost scroll compressor or vacuum pump

A low cost scroll device and methods of manufacturing the same are described. The scroll device includes, for example, a drive pin hole and bearing bores machined into a scroll of the scroll device from the same side as the involute of the scroll; idler shaft assemblies with no more than one bearing in the orbiting scroll for mechanically coupling the orbiting scroll to the fixed scroll; and an epoxy coating applied using a process that requires assembly of the scroll device only once.

SINGLE SCREW COMPRESSOR STRUCTURE AND METHOD OF ASSEMBLING SINGLE SCREW COMPRESSOR INCLUDING THE SAME

A single screw compressor structure includes a screw rotor and a casing, which houses the screw rotor. A tapered outer circumferential surface of the screw rotor has a plurality of helical grooves, with an outer diameter that increases from an inlet side toward a discharge side. The casing includes an outer tube member having a circular inner hole to form an interior, and an inner tube member is fixed to the interior of the outer tube member. The inner tube member has a tapered inner surface that opposes the tapered outer circumferential surface of the screw rotor. A single screw compressor further including a gate rotor is assembled mesh between the screw rotor and the gate rotor, aligning the tapered outer and inner circumferential surfaces relative to one another, and integrally coupling the outer and inner tube members to each other.

SCROLL COMPRESSOR WITH AXIAL VIBRATION PREVENTION FOR A SHAFT BEARING

PCT No. PCT/JP90/01424 Sec. 371 Date Sep. 3, 1991 Sec. 102(e) Date Sep. 3, 1991 PCT Filed Nov. 2, 1990 PCT Pub. No. WO91/06776 PCT Pub. Date May 16, 1991.In a scroll-type compressor, the revolving motion drive shaft 16, formed on the revolving end plate 12 at the side opposite to the revolving swirl blades 11, is fitted in an eccentric bearing eccentrically disposed inside of the main shaft of the crank shaft 6. The crank shaft 6 is connected to the rotor of the electric motor and is supported at the end portion thereof opposite to the main shaft by an upper bearing of a rolling type. Above the upper bearing, a rise preventing plate 24 for preventing the crank shaft 6 from excessively rising upwards is arranged in a fixed manner. The crank shaft 6 is so shaped as to have a stepped portion where the diameter of the shaft portion mounting the rotor 5 becomes stepwise greater than that of the shaft portion fitted in the upper bearing 21. Between the stepped portion and the inner race of the ...

Twin cylinder rotary compressor

A separator plate is provided in the pump cartridge assembly of a twin cylinder rotary compressor. The separator plate separates and coacts with other structure to define two distinct compression/suction chambers. Because there is only one correct assembly orientation, it provides automatic alignment of the two pump subassemblies making up the pump cartridge.

Multistage pump suitable for use in wells

Multistage pump comprising a plurality of components which include a plurality of pre-assembled pump modules, having at least one twin screw pump module. The multistage pump further has an elongate sleeve for housing the components, and a securing device attachable or engagable with a portion of the elongate sleeve. The securing device is operable to fixedly retain the components within the sleeve. Each of the pre-assembled pump modules has at least one thrust bearing.

Scroll compressor having a rotation inhibitor

An object is to provide a scroll compressor capable of avoiding problems caused by abnormal wear of a retaining ring used to prevent a cylindrical ring from being detached. The scroll compressor includes a crank shaft having a crank pin (6C) at a shaft end, a drive bush (10) into which the crank pin (6C) is fitted, a cylindrical ring (11) that is rotatably fitted to an outer periphery of the drive bush (10) and whose axial movement is inhibited by a retaining ring (27) mounted on the tip of the crank pin (6C), a drive bearing that is fitted to an outer periphery of the cylindrical ring (11). An orbiting scroll fitted to an outer periphery of the drive bearing is driven in an orbiting manner through the rotation of the crank shaft. A rotation inhibitor that interferes with the retaining ring (27) to inhibit the rotation of the retaining ring (27) is provided on an end surface of the drive bush (10).

Patch-sized fluid delivery systems and methods

A patch-sized fluid delivery device may include a reusable portion and a disposable portion. The disposable portion may include components that come into contact with the fluid, while the reusable portion may include only components that do not come into contact with the fluid. Redundant systems, such as redundant controllers, power sources, motor actuators, and alarms, may be provided. Alternatively or additionally, certain components can be multi-functional, such a microphones and loudspeakers that may be used for both acoustic volume sensing and for other functions and a coil that may be used as both an inductive coupler for a battery recharger and an antenna for a wireless transceiver. Various types of network interfaces may be provided in order to allow for remote control and monitoring of the device.

Compressor

A compressor is provided which enables easy installation of the filter even when any refrigerant suction passage cannot be provided on a cylinder side of a compression element or even when any long suction passage cannot be provided. The compressor comprises, in a sealed container 12, a drive element 14, a rotary compression mechanism 18 including first and second rotary compression elements 32 and 34, an upper support member 54 and a lower support member 56 for journaling a rotary shaft 16. The upper support member 54 and the lower support member 56 are provided with suction passages 58 and 60 for communicating with the interior of upper and lower cylinders 38 and 40 at suction ports 161 and 162, respectively, and recessed noise eliminating chambers 62 and 64. Filter installation portions 180 and 182 which are recessed are provided to surround and enclose open ends of the suction passages 58 and 60. Filters 184 and 186 are inserted into and installed on the filter installation portions ...

A ROTARY POSITIVE DISPLACEMENT PUMP

A rotary positive displacement pump includes a main body rotationally supporting two parallel, axially extending, shafts with gears in constant mesh condition, such that the shafts rotate in opposite directions. A rotor case body is connected to a front side of the main body and has a stationary interior pumping cavity, fluid product inlet and outlet openings, and two cylindrical rotor case hubs each receiving internally one of the shafts. A pair of rotors each have a rotor wing and a rotor drive element that is mounted torque proof on a rotor seat at an end region of one of the shafts. Each rotor seat pair has an axial abutment surface and a mounting surface. The pump also includes fasteners each engaging a mating section of one of the shafts and exerting an axial clamping force on one of the rotor drive elements against one of the axial abutment surfaces.

Scroll compressor

A scroll compressor includes a base seat portion which is integrally formed with one end surface of a shaft and in which a press-fitting hole exposing a first hole portion is formed. The base seat portion is disposed in a second portion of a penetration portion with a gap interposed between a drive bush body and the base seat portion.

Rotary vane compressor

There is provided a rotary compressor comprising an electric element, and first and second rotary compression elements driven by the electric element, these components being provided in a hermetically sealed container, CO2 refrigerant gas compressed by the first rotary compression element being discharged into the hermetically sealed container, and the discharged refrigerant gas of intermediate pressure being further compressed by the second rotary compression element, a cylinder constituting each rotary compression element, a support member adapted to seal an opening surface of each cylinder, and provided with a bearing of a rotary shaft erected on a centre, a discharge muffler chamber formed in the support member outside the bearing, and communicated with an inside of the cylinder and a cover attached to the support member to seal an opening of the discharge muffler chamber, wherein each cylinder, each support member and each cover are fastened by a plurality of main bolts, and each cylinder ...

Motor-driven compressor and method for manufacturing the same

A motor-driven compressor (10) includes an electric motor (19) having a stator core (26), a compression mechanism (18) driven by the electric motor (19), a motor housing (12) accommodating the electric motor (19) , and a cluster block (61) engaged with the stator core (26) in the motor housing (19) . The stator core (26) of the electric motor (19) and the motor housing (12) are assembled by shrink fit. The cluster block (61) accommodates a connecting terminal (31) for electrical connection between a conductor (54) connected to a motor drive circuit (52) and a lead wire (30) drawn from the electric motor (19). The cluster block (61) has a terminal hole (65) for receiving the connecting terminal (31) and has an opening (66, 67) that is provided separately from the terminal hole (65). A mehod for manufacturing the motor-driven compressor (10) applyng heating and cooling of the motor housing is also disclosed.

Motor vehicle fuel pump

一軸偏心ねじポンプ

GEAR PUMP AND METHOD OF PRODUCING THE SAME

PROBLEM TO BE SOLVED: To provide a gear pump capable of achieving improved sealing ability with a reduced number of parts. SOLUTION: The gear pump comprises a pump assembly and casings for storing the pump assembly and forming a second oil chamber. The pump assembly has a drive side gear supported by a drive shaft, a driven side gear supported by a driven shaft, a pair of side plates arranged on both sides in the axial direction of the drive shaft and driven shaft, and a seal block for sealing tooth tops of the gears and forming a first oil chamber by coming into contact with the side plates. The casings receive the pump assembly and forms the second oil chamber. Ribs are provided on at least either of the side plates or the seal block and form oiltightness of the first oil chamber and second oil chamber by pressing them to each other for plastic deformation. COPYRIGHT: (C)2006,JPO&NCIPI ...

SCROLL-TYPE MACHINE

Scroll type fluid machine

In a scroll type fluid machine wherein there are engaged stator scroll means and rotary scroll means in intermeshing relationship with each other, each having a spiral or scroll blade portion projecting in the axial direction from the lateral plate surface in such a manner that the rotary scroll means may move in solar revolving motion with respect to the stator scroll means mounted stationary on a cup-like member by the rotating motion of a main shaft, while restricting the rotating motion of the rotary scroll means by function of a rotation blocking mechanism, so that the fluid may operatively be sucked into and delivered out of the fluid machine with a differential pressure produced therein in continued variation, an improvement is accomplished in that an angular phase relationship between the rotary scroll means and the stator scroll means may be compensated properly by shifting in rotation the rotary scroll means in the direction of rotating motion thereof in accordance with the extent ...

Bearing assembly for sealed compressor

Permanent magnet motor

Self aligning removable bearing carrier for a liquid ring vacuum pump

SCROLL TYPE FLUID MACHINE

ROTARY PUMP WITH MAGNETIC ROTOR MOUNTING PLATE

MASCHINE, WIE KOMPRESSOR, VOM SPIRALVERDRÄNGERTYP

ROTOR ARRANGEMENT

FUEL DELIVERY MODULE

KÄLTEMITTELVERDICHTER

Hermetisch gekapselter Kältemittelverdichter, welcher ein hermetisch dichtes Verdichtergehäuse (1) aufweist, in dessen Innerem eine ein Kältemittel verdichtende Kolben-Zylinder-Einheit arbeitet und ein Saugrohr (2) sowie ein Druckrohr (3) vorgesehen ist, wobei über das Saugrohr (2) Kältemittel zur Kolben-Zylinder-Einheit strömt und das von der Kolben-Zylindereinheit verdichtete Kältemittel über das Druckrohr (3) aus dem Verdichtergehäuse (1) heraus befördert wird, wobei am Verdichtergehäuse (1) Anschlussöffnungen (5) für das Saugrohr (2) bzw. das Druckrohr (3) vorgesehen sind, wobei die Anbindung des Saugrohrs (2) bzw. des Druckrohrs (3) an die Anschlussöffnungen (5) über eine Anschlussvorrichtung (9) hermetisch dicht erfolgt. Erfindungsgemäß ist vorgesehen, dass die Anschlussvorrichtung (9) ein vorzugsweise hülsenförmig ausgebildetes Korpuselement (8) sowie mindestens ein Distanzelement (7) aufweist, welches das Korpuselement (8) vom Saugrohr (2) bzw. Druckrohr (3) distanziert.

FLUID-FLOW MACHINE

SCROLL TYPE COMPRESSOR

Scroll type fluid machine

SCROLL TYPE FLUID DISPLACEMENT APPARATUS WITH IMPROVED FIXED CONSTRUCTION OF FIXED SCROLL

LOBED ROTOR WITH CIRCULAR SECTION FOR FLUID-DRIVING APPARATUS

A fluid displacement apparatus includes a stator section with a rotor therein. The stator section includes a cylindrical casing, a helically-convoluted chamber section within the cylindrical casing, and a rigid sleeve within the cylindrical casing and separate from the helically-convoluted chamber section. The rigid sleeve includes a circular internal bore. The rotor is rotatably disposed within the cylindrical casing. The rotor includes a helically-lobed section disposed within the helically-convoluted chamber section, and a circular cylinder section disposed within the rigid sleeve. The circular cylinder section provides a fluid passageway between the rigid sleeve and the circular cylinder section. Side loads from the rotor are distributed along a contact line at any point of rotation of the circular cylinder section within the rigid sleeve.

COMPRESSOR CRANKSHAFT WITH BEARING SLEEVE AND ASSEMBLY METHOD

A compressor assembly having a drive shaft supported by a main bearing and an outboard bearing located on opposite axial ends of a cylinder block. The main bearing has a bearing support formed therein in which first and second apertures are defined. The diameter of the first aperture is less than the diameter of the second aperture. The shaft extends through the first and second apertures with the diameter of the drive shaft having an outer diameter which is no greater than the diameter of the first aperture. A sleeve is mounted on the drive shaft and is at least partially disposed within the second aperture. A bearing is located in the second aperture and engages the sleeve and the main bearing to rotationally support the drive shaft. The sleeve can have a thickness which allows the bearing to be of a standard size rather than a custom size.

ROTARY PISTON MACHINE

Proposed is an electrically driven rotary piston machine which operates as a rotary piston pump or rotary piston compressor, having a base housing (1) which holds an electric coil (2) and a pump head (3), wherein the pump working space is preferably delimited by a trochoidal toothing of the rotors (15, 17). According to the invention, the pump head (3), which can usually be produced relatively cost-effectively, is designed as a disposable part and therefore has a quick-action connection (7, 10, 11, 12, 14) to the more expensive base housing (1).

COMPRESSOR

A compressor, comprises a hermetic housing having a refrigerant inlet and a refrigerant outlet, a motor having a stator and a rotor positioned within the housing, a crankshaft including an eccentric, the crankshaft rotatably engaged with the rotor, first and second bearings positioned within the housing, the crankshaft rotatably supported by at least one of the bearings, and a cylinder block moveable relative to the bearings, the cylinder block defining a cylinder bore extending therethrough and configured to receive a refrigerant therein, the eccentric positioned in and engaging the cylinder bore whereby rotation of the d crankshaft and the eccentric causes reciprocating translation of the cylinder block with respect to the bearings to compress the refrigerant from a suction pressure to a discharge pressure. The hermetic housing comprises a first portion and a second portion connected to the first portion, the first and second bearings being disposed between the first and second portions ...

SYSTEM FOR PUMPING LIQUID MEDIA FROM A BORE AND METHOD FOR INSTALLING A PUMP UNIT DESIGNED AS A PROGRESSIVE CAVITY PUMP IN A BORE

The invention relates to a system for pumping liquid media from a bore. The system comprises a riser pipe, which extends at least approximately in a longitudinal direction of the bore, and a pump unit, which is accommodated in the riser pipe and which has a stator and a rotor. The system also comprises a drive train connected to the rotor for eccentrically moving the rotor. The system also comprises an adapter unit, which is connected to the stator and which holds the stator substantially stationary in the riser pipe by means of clamping contact with the riser pipe. The invention further relates to a method for installing a pump unit designed as a progressive cavity pump in a bore.

SCROLL TYPE COMPRESSOR HAVING AN ABRASION-RESISTANT MEANS BETWEEN A CRANK PIN AND A MOVABLE SCROLL IN AN AXIAL DIRECTION

A fixed scroll (16) and a movable scroll (18) cooperatively define compressing chambers therebetween. The movable scroll is driven by a crank pin (12) eccentrically attached to a shaft (11) which is rotated by an external driving source. A surface treatment for abrasion resistance is applied to at least one of an end surface of the crank pin and a confronting end plate of the movable scroll. It may also be arranged that an abrasion-resistant plate is interposed between the end surface of the crank pin and the confronting end plate of the movable scroll.

Scroll compressor

Rotary compressor

The invention provides a rotary compressor including an oiling mechanism that is capable of preventing deformation or diameter expansion of a countershaft portion of a rotating shaft. The rotary compressor includes an oiling mechanism that supplies lubricating oil retained in the lower part of a compressor housing to a sliding portion of a compressing unit through a vertical oil hole and a lateral oil hole of the rotating shaft, wherein the oiling mechanism includes: a vertical fitting hole formed on the countershaft portion in the lower part of the rotating shaft, and an oil pipe having an inlet port at the lower end and an opening at the upper end. The upper part of the oil pipe is press-fitted into the vertical fitting hole. The oiling mechanism further contains a pump vane being shaped like a long and thin plate and having a vane portion and a base portion. The vane portion is twisting processed and inserted into the vertical oil hole to provide a space. The base portion is formed to ...

COMPRESSOR HAVING COUNTERWEIGHT ASSEMBLY

Closed electric compressor and assembling method thereof

Methods for making a low inertia laminated rotor

Compressor with liquid injection cooling

A positive displacement compressor designed for near isothermal compression. A rotor includes a curved sealing portion that coincides with a in an interior rotor casing wall. Liquid injectors provide cooling liquid. A gate moves within the compression chamber to either make contact with or be proximate to the rotor as it turns. Gate positioning systems position the gate in this manner, taking into account the shape of the rotor. Outlet valves allow for expulsion of liquids and compressed gas. The unique geometry and relationship between the parts provides for efficiencies and higher pressures not previously found in existing compressor designs.

Rotor of compressor motor

There is provided a rotor of a compressor motor at a low cost in which a balance weight is stably positioned. A rotor includes a rotor laminated steel plate ( 12 ), rotor end plates ( 16, 18 ) arranged on both end surfaces of the rotor laminated steel plate ( 12 ), and balance weights ( 20, 22 ) provided on the outer surfaces of the rotor end plates ( 16, 18 ), respectively. The rotor laminated steel plate ( 12 ) and the rotor end plates ( 16, 18 ) are provided with at least three axial through holes ( 24 ) that are equally spaced apart in the circumferential direction. The rotor laminated steel plate ( 12 ) and the rotor end plates ( 16, 18 ) are fixed by three rivets ( 26 a, 26 b, 26 c ) passing through the axial through holes ( 24 ), respectively. The balance weight ( 20 ) is fixed to the rotor end plate ( 16 ) by the two rivets ( 26 a, 26 b ) of the three rivets. The balance weight ( 22 ) is fixed to the rotor end plate ( 18 ) by the remaining one rivet ( 26 c ), and is positioned by the engagement members ( 28 ).

Adhesive and peripheral systems and methods for medical devices

Fill stations and base stations are provided for personal pump systems. The fill stations may be opened and closed to accept a reservoir and to allow fluid to be introduced into the reservoir for use with personal pump systems. The fill stations may hold the reservoir at a tilt relative to an underlying surface and may discourage overfilling of the reservoir. The filling stations may also include viewing windows having fluid lines marked thereon for indicating volume of fluid within the reservoir.

No-Go Tag Systems and Methods for Progressive Cavity Pumps

A stator for a progressive cavity pump comprises a stator housing having a central axis, a first end, and a second end opposite the first end. In addition, the stator comprises a stator liner disposed within the stator housing. The stator liner has a first end and a second end opposite the first end. The first end of the stator liner is axially spaced from the first end of the stator housing. Further, the stator comprises a tag insert positioned in the stator housing between the first end of the stator housing and the first end of the stator liner. The tag insert has a through passage defining a radially inner surface that includes a tag shoulder.

Patch-sized fluid delivery systems and methods

A patch-sized fluid delivery device may include a reusable portion and a disposable portion. The disposable portion may include components that come into contact with the fluid, while the reusable portion may include only components that do not come into contact with the fluid. Redundant systems, such as redundant controllers, power sources, motor actuators, and alarms, may be provided. Alternatively or additionally, certain components can be multi-functional, such a microphones and loudspeakers that may be used for both acoustic volume sensing and for other functions and a coil that may be used as both an inductive coupler for a battery recharger and an antenna for a wireless transceiver. Various types of network interfaces may be provided in order to allow for remote control and monitoring of the device.

Adhesive and peripheral systems and methods for medical devices

A repeater system may control a pump by using a repeater and a user interface. An adhesive patch system may be used for affixing a pump or other object to a human body. Such an adhesive patch system may include two sets of adhesive members, each member including an adhesive material on at least one side so as to attach to the body. The members of the first set are spaced to allow the members of the second set to attach to the body in spaces provided between the members of the first set, and the members of the second set are spaced to allow members of the first set to detach from the body without detaching the members of the second set. Also, fill stations and base stations are provided for personal pump systems.

Meat processing assembly

An improved processing assembly having a meat emulsion pump connected to a stuffing horn. The stuffing horn positioned to fill casings with meat emulsion which form a strand of processed meat that is received by a twister, then a linker, and subsequently deposited on a conveyor.

Symmetrical vane pump apparatus and method

The invention relates to a vane cell pump ( 1 ) comprising an electrical drive unit with an electric motor and a motor shaft ( 6 ), a pump chamber ( 2 ) that connects to the electrical drive unit and has a pump ring ( 3 ), and also a rotor ( 4 ) that is arranged concentric to the motor shaft ( 6 ) within the pump chamber ( 2 ) and is in active connection with the motor shaft ( 6 ), wherein the rotor ( 4 ) has a number of guide slots ( 40 ) that extend inward from the outer circumference of the rotor and in each of which a vane ( 5 ) is arranged in a moveable manner with two vane ends ( 50, 51 ) opposite each other. The vane ends ( 50, 51 ) of each vane ( 5 ) have a mirror-symmetric design relative to the transverse center plane of the vane.

Electric oil pump

A pump housing of a gear pump and a stator of an electric motor are fastened to each other with bolts via a front insulator. Dowel pins are inserted in respective through-holes that are formed in the front insulator at equal intervals in a circumferential direction so as to be located next to insertion holes for the bolts. Respective end portions of each dowel pin are in contact with a bottom face of the pump housing and a pump-side surface of the stator core, and the pump housing and the front insulator are fixed to each other such that a slight gap is formed between the pump housing and the front insulator.

Motor-driven compressor

A motor-driven compressor includes an electric motor, a compression mechanism driven by the electric motor to compress refrigerant, a housing accommodating the electric motor and the compression mechanism, and a support having a mounting to be fastened to an object by a fastener. One of the housing and the support has a projection and the other of the housing and the support has a recess that is engaged with the projection through a vibration damper so that the support supports the housing.

Compressor having a lower frame and a method of manufacturing the same

A compressor having a lower frame and a method of manufacturing the same are disclosed. The compressor may include a cylindrical shell, a rotational shaft rotatably mounted in the cylindrical shell, a rotor and a stator that rotates the rotational shaft, a compression device driven by the rotational shaft, a lower bearing configured to rotatably support one side of the rotational shaft, a lower frame configured to support the lower bearing, the lower frame being configured to be press-fitted into a lower end portion of the cylindrical shell, and a base configured to seal the lower end portion of the cylindrical shell. The lower frame may include a main body configured to be press-fitted onto an inner circumferential surface of the cylindrical shell and a flange that extends from the main body, the flange being configured to limit a press-fit depth by contacting the lower end portion of the cylindrical shell.

Patch-sized fluid delivery systems and methods

A patch-sized fluid delivery device may include a reusable portion and a disposable portion. The disposable portion may include components that come into contact with the fluid, while the reusable portion may include only components that do not come into contact with the fluid. Redundant systems, such as redundant controllers, power sources, motor actuators, and alarms, may be provided. Alternatively or additionally, certain components can be multi-functional, such a microphones and loudspeakers that may be used for both acoustic volume sensing and for other functions and a coil that may be used as both an inductive coupler for a battery recharger and an antenna for a wireless transceiver. Various types of network interfaces may be provided in order to allow for remote control and monitoring of the device.

Simplified roots-type blower

The present disclosure relates to a simplified roots-type blower having an improved sound signature. The roots-type blower includes a rotor bore housing having a molded, one-piece polymeric construction. The rotor bore housing defines a first rotor bore and a second rotor bore. The rotor bore housing also defines a first bearing pocket corresponding to the first rotor bore and a bearing pocket corresponding to the second rotor bore axis. The rotor bore housing further defining a timing gear chamber.

SCROLL COMPRESSORS WITH DIFFERENT VOLUME INDEXES AND SYSTEMS AND METHODS FOR SAME

A plurality of scroll compressors with different fixed volume indexes are connected in fluid parallel circuit and configured to selectively operate to maximize isentropic efficiency at different condensing temperatures. Different quantities of scroll compressors of different volume indexes may be selected based upon typical climate or geographic location environmental conditions to attempt to maximize efficiency. A controller may selectively operate different combinations of the compressors of different volume indexes bases up load demands and condensing temperature conditions, which may be determined in a variety of ways. 1. A compressor arrangement , comprising:a plurality of refrigerant compressors connected in parallel circuit, each refrigerant compressor having a volume index, the plurality of refrigerant compressors including at least a first compressor and a second compressor, wherein each of the first compressor and the second compressor include a single inlet, single outlet, and a single flowpath extending between the single inlet and the single outlet, and wherein each of the first compressor and the second compressor includes a housing and a motor contained within said housing, the first compressor having a different volume index than each second compressor, wherein the volume index of the first compressor and the second compressor is fixed and non-variable.2. The compressor arrangement of claim 1 , wherein the first and second compressors are scroll compressors.3. The compressor arrangement of claim 2 , wherein in relative relation between the first and second compressors claim 2 , each first compressor has a higher isentropic efficiency at a high temperature range for saturated condensing temperature claim 2 , and wherein each second compressor has a higher isentropic efficiency at a low temperature range for saturated condensing temperature claim 2 , the high temperature range being higher than the low temperature range.4. The compressor arrangement of ...

Hydraulic Pump

A hydraulic pump is described comprising a rotor provided for rotation about a longitudinal axis (X-X) within a housing. The pump comprises a plurality of chambers for pumping a fluid that are provided by longitudinally extending recesses in a circumferential outer surface of the rotor. During use the recesses are moved across a circumferential inner surface of the housing, and in so doing, are moved over an inlet port in the housing to draw fluid into the chamber and then over an outlet port in the housing to discharge the fluid. The hydraulic pump further comprises a roller that is mounted in a longitudinally extending pocket of the housing. The roller is positioned after the outlet port in a direction of the rotor's rotation and is arranged to follow the outer surface of the rotor and seal against each recess as it is drawn past the roller, thereby directing fluid from the chamber into the outlet port. 1. A hydraulic pump comprising a rotor provided for rotation about a longitudinal axis within a housing , the pump comprising:a plurality of chambers for pumping a fluid, the chambers being provided by longitudinally extending recesses in a circumferential outer surface of the rotor, the recesses being moved across a circumferential inner surface of the housing during rotation of the rotor, and in so doing, being moved over an inlet port in the housing to draw fluid into the chamber and then over an outlet port in the housing to discharge the fluid, whereinthe hydraulic pump further comprises a roller that is mounted in a longitudinally extending pocket of the housing, the roller being positioned after the outlet port in a direction of the rotor's rotation, the roller further being arranged to follow the outer surface of the rotor and seal against each recess as it is drawn past the roller, thereby directing fluid from the chamber into the outlet port.2. The hydraulic pump according to wherein the rotor comprises:a plurality of magnets which are able to generate a ...

STATOR ASSEMBLY FOR A PROGRESSIVE CAVITY PUMP OR A PROGRESSIVE CAVITY MOTOR AS WELL AS METHOD FOR MANUFACTURING AND REPAIRING THE SAME

A stator assembly for a progressive cavity pump or a progressive cavity motor includes connectors for connecting functional elements and at least one stator, the stator including an outer pipe as well as a lining subject to wear which is disposed inside the outer pipe, the at least one stator being disposed between the connectors such that a cavity extending across the entire stator assembly for housing a rotor is created. Between at least one of the connectors and at least one stator adjacent thereto and/or between adjacent stators an adhesion region is provided, whereby in the adhesion region an adhesive is disposed in such a way that between the at least one connector and the at least one stator adjacent thereto and/or between said respectively adjacent stators a substance-to-substance connection is created. 1. A stator assembly for a progressive cavity pump or a progressive cavity motor , with connectors for connecting functional elements and at least one stator , said stator comprising an outer pipe as well as a lining disposed inside said outer pipe and being subject to wear , said least one stator being disposed between said connectors so that a cavity extending through the entire stator assembly is formed for housing a rotor ,whereinbetween at least one of said connectors and at least one Stator adjacent thereto and/or between adjacent stators an adhesion region is provided whereby an adhesive is disposed inside said adhesion region in such a way that between said at least one connector and said at least one stator adjacent thereto and/or between said respective adjacent stators a substance-to-substance connection is created.2. The stator assembly according to claim 1 , wherein claim 1 , in addition to the adhesive region claim 1 , a screw thread region is disposed between at least one of said connectors and at least one stator adjacent thereto and/or between the respective adjacent stators for forming a positive locking and force-fit connection.3. The ...

METAL FELT AND BRUSH STRUCTURES AS SEALING ELEMENTS IN METAL-METAL MUD MOTORS

A mud motor and a drill string having the mud motor. The mud motor includes a stator and a rotor. A lining between the stator and the rotor includes fibers forming a fiber pattern. The lining is a coating of at least one of a lobed inner surface of the stator and a lobed outer surface of the rotor. 1. A mud motor , comprising:a stator;a rotor; anda lining between the stator and the rotor, the lining including fibers forming a fiber pattern.2. The mud motor of claim 1 , wherein the lining is a coating of at least one of a lobed inner surface of the stator and a lobed outer surface of the rotor.3. The mud motor of claim 2 , wherein the lining is adhered by at least one of: (i) an adhesive; (ii) a sintering process; (iii) a soldering process; (iv) a welding process; and (v) a brazing process.4. The mud motor of claim 1 , wherein the fiber pattern further comprises one of: (i) a felt pattern; (ii) a web pattern; (iii) a mesh pattern; and (iv) a brush pattern.5. The mud motor of claim 1 , wherein a material of the fibers includes at least one of: (i) nickel; (ii) nickel alloy; (iii) stainless steel; (iv) low alloy steel; (v) copper; (vi) copper alloy; (vii) carbon fiber; (viii) glass fiber; and (ix) polymeric fiber.6. The mud motor of claim 1 , wherein the fiber pattern includes a gap between the fibers.7. The mud motor of claim 6 , further comprising a secondary material in the gap claim 6 , the secondary material being at least one of: (i) polytetrafluoroethylene (PTFE); (ii) polyether ether ketone (PEEK); (iii) a polymer; and (iv) an elastomer.8. The mud motor of claim 6 , wherein the gap is unfilled.9. The mud motor of claim 1 , wherein the mud motor is configured to operate at temperatures higher than 150 C for more than 40 circulation hours.10. A method for manufacturing a mud motor claim 1 , the method comprising:forming a mud motor comprising a stator and a rotor; anddisposing a lining between the stator and the rotor, the lining including fibers forming a fiber ...

VANE ROTARY COMPRESSOR

A vane rotary compressor includes a roller rotatably supported in a cylinder and including a plurality of vane slots formed along a circumferential direction with back pressure chambers formed at one end of each of the vane slots. A plurality of vanes are slidably supported in the vane slots protruding toward an inner circumferential surface of the cylinder. A compression space formed by the vanes between the roller and the cylinder includes an inlet port and an outlet port formed at both sides of a contact point between the roller and the cylinder. A vane positioned between the inlet port and the outlet port is configured such that a front gap between a front surface of the vane and the inner circumferential surface of the cylinder is smaller than a rear gap between a rear surface of the vane and an inner surface of the back pressure chamber. 1. A vane rotary compressor , comprising:a cylinder;a main bearing and a sub bearing coupled to the cylinder to form a compression space together with the cylinder, wherein at least one of the main bearing and the sub bearing includes a back pressure pocket formed on a surface facing the cylinder;a rotation shaft radially supported by the main bearing and the sub bearing;a roller coupled to the rotation shaft and rotatably supported within the cylinder between the main bearing and the sub bearing, the roller being configured such that an outer circumferential surface of one side of the roller is positioned in close proximity with an inner circumferential surface of the cylinder at a contact point, the roller including a plurality of vane slots formed along a circumferential direction of the roller, with each of the vane slots including one end opened toward the outer circumferential surface of the roller, and a back pressure chamber formed at the opposite end of the vane slot and in fluid communication with the back pressure pocket during at least a portion of a full rotation of the roller;a plurality of vanes slidably ...

PROGRESSIVE CAVITY PUMP AND METHOD FOR OPERATING SAME IN BOREHOLES

A method for operating a progressive cavity pump wherein the stator has at least first and second active stator sections that are at different locations on the stator, comprising inserting a first rotor having a first active rotor section that is aligned with the first active stator section, and rotating the first rotor relative to the first active stator section such that the aligned first active rotor and stator sections generate a pumping force. Subsequently, the first rotor is removed and a second rotor is inserted having a second active rotor section that is aligned with the second active stator section, and rotating the second rotor relative to the second active stator section such that the aligned second active rotor and stator sections generate a pumping force. 18-. (canceled)9. A progressive cavity pump assembly for operation in a borehole , comprising:(a) a unitary stator comprising at least first and second active stator sections at different locations on the stator;(b) a first rotor having a first active rotor section that is configured for alignment with the first active stator section when the first rotor is mounted at a selected location relative to the stator; and(c) a second rotor configured for insertion into the stator independently of the first rotor, and having a second active rotor section that is configured for alignment with the second active stator section when the second rotor is mounted at the selected location relative to the stator, the first and second rotors configured for separate and serial operation within the stator.10. The pump assembly as claimed in further comprising a tubing joint mountable to a bottom end of the stator claim 9 , the tubing joint having a tag bar.11. The pump assembly as claimed in wherein the first rotor comprises a slim rod having a bottom end coupled to the first active rotor section claim 10 , and a top end connectable to a rod string.12. The pump assembly as claimed in wherein the second rotor comprises a ...

SCREW COMPRESSOR

A screw compressor includes a casing, a drive shaft, a screw rotor, a gate rotor, a slide valve, and a slide valve driving mechanism having a hydropneumatic cylinder. The drive shaft has one end supported via a bearing on a bearing holder held by the casing. The other end is coupled to an electric motor. A compression chamber is defined by the gate rotor meshing with a helical groove formed on the screw rotor. The hydropneumatic cylinder is located opposite to the screw rotor with respect to the bearing. The bearing holder has an outer peripheral surface configured as a guide surface guiding a sliding movement of the slide valve. The bearing holder has axial end portions. One of the axial end portions located opposite to the screw rotor constitutes a cylinder tube of the hydropneumatic cylinder to achieve integration of the bearing holder and the hydropneumatic cylinder. 1. A screw compressor comprising:a casing;a drive shaft having one end supported, via a bearing, on a bearing holder held by the casing, and an other end coupled to an electric motor;a screw rotor coupled to the drive shaft;a gate rotor defining a compression chamber in the casing by meshing with a helical groove formed on the screw rotor;a slide valve slidable in an axial direction of the screw rotor and capable of regulating an area of a discharge opening of the compression chamber; anda slide valve driving mechanism including a hydropneumatic cylinder configured to drive the slide valve,the hydropneumatic cylinder being located opposite to the screw rotor with respect to the bearing interposed therebetween, andthe bearing holder having an outer peripheral surface configured as a guide surface guiding a sliding movement of the slide valve,the bearing holder having axial end portions, with one of the axial end portions located opposite to the screw rotor constituting a cylinder tube of the hydropneumatic cylinder, thereby achieving integration of the bearing holder and the hydropneumatic cylinder.2 ...

VARIABLE VOLUME RATIO COMPRESSOR

A compressor and method for controlling the volume ratio of a compressor is provided. The compressor includes a an intake passage, a discharge passage and a compression mechanism, the compression mechanism being positioned to receive vapor from the intake passage and provide compressed vapor to the discharge passage. At least one opening is positioned in the compression mechanism to bypass a portion of the vapor in the compression mechanism to the discharge passage, the at least one opening being sized and positioned to automatically vary a volume ratio in the compressor in response to a varying pressure differential between the intake passage and the discharge passage. 1. A compressor comprising:an intake passage;a discharge passage;a compression mechanism, the compression mechanism being positioned to receive vapor from the intake passage and provide compressed vapor to the discharge passage; andat least one opening positioned in the compression mechanism to bypass a portion of the vapor in the compression mechanism to the discharge passage;wherein the at least one opening being sized and positioned to automatically vary a volume ratio in the compressor in response to a varying pressure differential between the intake passage and the discharge passage.2. The compressor of claim 1 , wherein the volume ratio is variable between a partial load and a full load.3. The compressor of claim 1 , wherein the compressor is a screw compressor.4. The compressor of claim 3 , wherein the screw compressor includes a first rotor and a second rotor.5. The compressor of claim 4 , wherein the at least one opening is positioned in fluid communication with at least one of the first rotor and the second rotor.6. The compressor of claim 4 , wherein the at least one opening is positioned in fluid communication with each of the first rotor and the second rotor.7. The compressor of claim 6 , wherein at least a portion of the at least one opening is positioned symmetric to a plane positioned ...

Twin vane rotary vacuum pump

Vacuum pump ( 1 ), comprising a housing ( 2 ) having an inlet ( 4 ) and an outlet ( 6 ) and defining a chamber ( 8 ) within the housing ( 2 ), a rotor ( 10 ) for rotational movement about a rotational axis (AR) within the chamber ( 8 ), and at least a first and a second vane ( 22, 24 ) received in respective first and seconds slots ( 16, 18 ) formed in the rotor ( 10 ). The first and second slots ( 16, 18 ) are substantially parallel to each other, and a length (L V ) of each vane ( 22, 24 ) is larger than a length (L S ) of the respective slot. Production method of such a vacuum pump.

Device to Determine Volume of Fluid Dispensed

An apparatus for determining the volume of fluid dispensed. The apparatus has an acoustic volume sensor that acoustically excites a reference volume and a measurement chamber with a loudspeaker and measures the acoustic response with microphones acoustically coupled to the reference and the measurement chamber. The loudspeaker and sensing microphones are connected to the measurement chamber by separate ports. A detachable dispensing chamber is coupled to the acoustic volume sensor. The volume of the fluid dispensed is determined by a processor based on the acoustic response of the microphones to acoustic excitement by the loudspeaker.

TOLERANCE INDEPENDENT CRESCENT INTERNAL GEAR PUMP

A crescent internal gear pump includes a front cover, an end cover, a ring gear and a pinion gear disposed within a gear housing in an eccentric, intermeshing relationship. The housing is disposed intermediate the front cover and the end cover. A crescent is disposed radially intermediate the ring gear and the pinion gear. The crescent partially extends into a correspondingly shaped slot in the end cover. The gear housing, the ring gear, and the pinion gear can have substantially the same thickness. A shim can be disposed intermediate the end cover and the gear housing for establishing a desired clearance therebetween. 1. A crescent internal gear pump comprising:a front cover;an end cover having a slot therein;a gear housing disposed between the front cover and the end cover;a ring gear and a pinion gear disposed within the gear housing in an eccentric, intermeshing relationship; anda crescent disposed radially intermediate the ring gear and the pinion gear;wherein a portion of the crescent extends into the slot in the end cover.2. The crescent internal gear pump of claim 1 , wherein the crescent is moveable into and out of the slot.3. The crescent internal gear pump of claim 1 , wherein a front face of the crescent engages with the front cover.4. The crescent internal gear pump of claim 1 , wherein the crescent is press-fit into the slot and forms a fluid tight seal with the end cover.5. The crescent internal gear pump of claim 1 , wherein the slot has a cross-sectional shape that is substantially the same as a cross-sectional shape of the crescent.6. The crescent internal gear pump of claim 1 , further comprising a biasing member disposed with the slot and configured to forcibly hold the crescent in engagement with the front cover.7. The crescent internal gear pump of claim 1 , further comprising a shim disposed intermediate the gear housing and the end cover.8. The crescent internal gear pump of claim 7 , wherein the shim has a thickness selected to establish a ...

TWIST-LOCK, BOLTLESS FIXED SCROLL-TO-FRAME JOINT

A scroll compressor and methods of assembling the scroll compressor are disclosed. The scroll compressor includes a frame aligned about a longitudinal axis of the scroll compressor, the frame including a plurality of extensions extending radially from the longitudinal axis, the plurality of extensions including axially extending frame interlock mechanisms. A fixed scroll support is aligned about the longitudinal axis, the fixed scroll support including a plurality of extensions extending radially from the longitudinal axis, the plurality of extensions including axially extending fixed scroll support interlock mechanisms configured to engage the frame interlock mechanisms upon radial rotation. A fixed scroll wrap is integral with or attached to the fixed scroll support. 1. A scroll compressor , comprising:a shell;a frame aligned about a longitudinal axis of the scroll compressor, the frame being fitted into the shell;a fixed scroll having a fixed scroll wrap and a fixed scroll support, wherein the fixed scroll support is aligned about the longitudinal axis and is secured to the frame in a boltless connection; andan intermediate cap engaging with a surface of the fixed scroll support on an opposite side of the fixed scroll wrap, the intermediate cap being secured to the shell and contacting an annular region of the fixed scroll support to bias the fixed scroll against the frame.2. The scroll compressor of claim 1 , wherein the frame includes a plurality of extensions extending radially from the longitudinal axis claim 1 , the plurality of extensions including axially extending frame interlock mechanisms; andthe fixed scroll support includes a plurality of extensions extending radially from the longitudinal axis, the plurality of extensions including axially extending fixed scroll support interlock mechanisms configured to engage the frame interlock mechanisms upon radial rotation.3. The scroll compressor of claim 2 , wherein at least one of the plurality of frame ...

SCROLL COMPRESSOR AND AIR CONDITIONING APPARATUS INCLUDING THE SAME

A scroll compressor includes a fixed scroll and a movable scroll. The fixed scroll has a spiral fixed-side wrap positioned upright on a surface of a fixed-side plate. The movable scroll is orbitably disposed to face the fixed scroll. The movable scroll has a spiral movable-side wrap positioned upright on a surface of a movable-side plate, with the movable-side wrap being configured to mesh with the fixed-side wrap. A side clearance is formed between a side surface of the fixed-side wrap and a side surface of the movable-side wrap so as to increase from an outer peripheral side toward an inner peripheral side of each of the wraps. 1. A scroll compressor , comprising:a fixed scroll having a spiral fixed-side wrap positioned upright on a surface of a fixed-side plate; anda movable scroll orbitably disposed to face the fixed scroll, the movable scroll having a spiral movable-side wrap positioned upright on a surface of a movable-side plate, the movable-side wrap being configured to mesh with the fixed-side wrap,a side clearance being formed between a side surface of the fixed-side wrap and a side surface of the movable-side wrap so as to increase from an outer peripheral side toward an inner peripheral side of each of the wraps.2. The scroll compressor according to claim 1 , whereinthe increase in the side clearance is set such that the side clearance approaches a uniform state from the outer peripheral side to the inner peripheral side during an orbiting operation of the movable scroll.3. The scroll compressor according to claim 1 , whereinthe increase in the side clearance is set such that an increase rate of the side clearance becomes larger from the outer peripheral side toward the inner peripheral side.4. The scroll compressor according to claim 1 , whereinthe increase in the side clearance is obtained by decreasing a tooth thickness of at least one of the fixed-side wrap and the movable-side wrap from the outer peripheral side toward the inner peripheral side.5. ...

Scroll compressor

In a scroll compressor that forms two suction volume parts by engaging paired fixed scroll and turning scroll with each other while scroll laps respectively erected on end plates of the fixed scroll and the turning scroll are opposed to each other and driving the turning scroll to revolve around the fixed scroll, out of the two suction volume parts, one of the suction volume parts that is formed close to a suction port provided in a housing is made larger than the other suction volume part.

Scroll compressor and refrigeration apparatus including same

A scroll compressor includes a casing, compression mechanism housed in the casing, and drive shaft. The compression mechanism includes fixed and movable scrolls, and a housing. The housing includes a bearing portion configured to rotatably support the drive shaft, a body portion continuous with the bearing portion and extending radially outward, a pressing portion provided radially outside the body portion to press the casing, and a supporting portion extending from a face of the body portion near the fixed scroll. An end face of the supporting portion near the fixed scroll is a fastening face to which the fixed scroll is fastened. A gap is formed between an inner peripheral surface of the casing and outer peripheral surfaces of the body and supporting portions. An axial length of the gap is greater than or equal to an axial length of an inner peripheral surface of the supporting portion.

SCROLL COMPRESSOR

A scroll compressor according to the present disclosure includes a partition wall that divides a sealed vessel into a high-pressure space and a low-pressure space, a non-orbiting scroll provided in the low-pressure space, an orbiting scroll that forms a compression chamber between the orbiting scroll and the non-orbiting scroll, and a rotational shaft. The scroll compressor further includes a main bearing that supports the orbiting scroll, an elastic body that biases one of the non-orbiting scroll and the orbiting scroll so as to separate the non-orbiting scroll and the orbiting scroll from each other, and a plurality of columnar members that are fixed at one ends of the columnar members and are movable at the other ends of the columnar members, and are disposed in a circumferential direction. The non-orbiting scroll or the orbiting scroll that is biased by the elastic body is movable between the partition wall and the main bearing in an axial direction of the rotational shaft. The elastic body is disposed between the plurality of columnar members in the circumferential direction. 1. A scroll compressor comprising: a partition wall that divides a sealed vessel into a high-pressure space and a low-pressure space;a non-orbiting scroll provided in the low-pressure space, the non-orbiting scroll being disposed adjacent to the partition wall;an orbiting scroll that engages with the non-orbiting scroll with a compression chamber defined between the orbiting scroll and the non-orbiting scroll;a rotational shaft that orbits the orbiting scroll;a main bearing that supports the orbiting scroll;an elastic body that biases one of the non-orbiting scroll and the orbiting scroll so as to separate the non-orbiting scroll from the orbiting scroll; anda plurality of columnar members that are fixed at one ends of the columnar members and are movable at the other ends of the columnar members with respect to the main bearing and the non-orbiting scroll, the columnar members being ...

Self-Fixing Stator Housing

A stator casing of an eccentric screw pump with an elastomer stator inner part including a plurality of shell-like casing segments and a production method for such a stator casing, with which the outlay for maintenance work can be reduced. According to the invention, casing segments adjacent in the longitudinal direction of the stator casing are disposed offset with respect to one another around the longitudinal axis of the stator casing, wherein each casing segment includes connection means and at least four casing segments engage with one another and form a composite. For the production of the stator casing, the casing segments are acted upon by an axial force component as a result of clamping, wherein the casing segments engage with one another, as a result of which a radial force component is generated and the composite is formed. 1. A stator casing of an eccentric screw pump with an elastomer stator inner part comprising a plurality of shell-like casing segments , characterised in that casing segments adjacent in the longitudinal direction of the stator casing are disposed offset with respect to one another around the longitudinal axis of the stator casing , wherein each casing segment comprises at least one connector and at least four casing segments engage with one another and form a composite.2. The stator casing according to claim 1 , at least one connector is also at least one positioner.3. The stator casing according to claim 1 , the casing segments adjacent in the longitudinal direction of the stator casing being disposed offset through 90° with respect to one another around the longitudinal axis of the stator casing.4. The stator casing according to claim 1 , the stator casing further comprising at least six casing segments.5. The stator casing according to claim 1 , the casing segments having different lengths.6. The stator casing according to claim 1 , the elastomer stator inner part further comprising holding elements which fix the stator casing.7. A ...

Adhesive and Peripheral Systems and Methods for Medical Devices

A repeater system may control a pump by using a repeater and a user interface. An adhesive patch system may be used for affixing a pump or other object to a human body. Such an adhesive patch system may include two sets of adhesive members, each member including an adhesive material on at least one side so as to attach to the body. The members of the first set are spaced to allow the members of the second set to attach to the body in spaces provided between the members of the first set, and the members of the second set are spaced to allow members of the first set to detach from the body without detaching the members of the second set. Also, fill stations and base stations are provided for personal pump systems.

Compressor and assembling method thereof

A compressor comprises a housing; a motor and a cylinder in the housing; a crankshaft for transmitting rotation force of the motor to pistons of the cylinder for compressing refrigerant; a compressing space formed by an upper cylinder cover, a lower cylinder and the cylinder and the upper cylinder cover and the lower cylinder cover are also used to prop up the crankshaft. The upper cylinder cover is disposed between the motor and the cylinder. The upper cylinder cover includes an through-hole for holding the crankshaft. The upper cylinder cover includes a first side facing the motor and a second side facing the cylinder. An inner wall of the casing is laser welded with an outer periphery of the first side and/or an outer periphery of the second side of the upper cylinder cover.

ELECTRIC COMPRESSOR AND METHOD FOR ASSEMBLING SAME

The purpose of the present invention is to provide a connecting part accommodating container for insulating an external power line without compromising ease of assembly, and an electric compressor provided therewith. Provided is an electric compressor comprising an electric motor that is housed in a casing and is for driving a compression part for compressing a refrigerant guided into a casing, and a connecting part accommodating container in which an external power line is guided from the exterior of the casing, and which is for accommodating a connecting part for electrically connecting in the interior of the casing the external power line that supplies power to the electric motor and an internal power line that is guided from the electric motor, wherein: an insertion hole through which the internal power line is inserted is provided to the connecting part container; the connecting part container can be split with a splitting line for splitting the connecting part container and splitting the insertion hole; a first rubber ring for blocking off the insertion hole in a liquid-tight state is disposed inside the connecting part container; and the first rubber ring is sandwiched between split walls forming the insertion hole. 1. An electric compressor , comprising:an electric motor contained in a casing, and driving a compression part compressing a refrigerant guided into the casing; anda connecting part container having an external power line supplying electric power to the electric motor guided in from outside the casing, and containing a connecting part electrically connecting, within the casing, the external power line and an internal power line guided from the electric motor;the connecting part container being provided with an insertion hole, the internal power line being inserted through the insertion hole;the connecting part container being splittable at a splitting line splitting the connecting part container and splitting the insertion hole;a first rubber ring ...

CLEARANCE ADJUSTMENT FOR TWIN-SCREW PUMPS

Technologies are generally described for clearance adjustments in twin-screw pump assemblies. A twin-screw pump assembly may include a conically shaped portion of a drive shaft enveloped by a bushing. For clearance adjustment, both clamping nuts of the drive shaft, which provide pretention to the bushing and secure an axial position of a threaded screw to the drive shaft, may be removed on the flow side of the pump assembly and the bushing loosened to adjust the angularity between bushing and drive shaft. The bushing may then be pushed over the conically shaped portion and both clamping nuts re-assembled. In some examples, a clamping nut of the driven shaft may be designed and used as removal/loosening tool for the drive shaft bushing. 1. A method for clearance adjustment of a pump assembly , the method comprising: the drive shaft is configured to receive a rotational force outside the pump assembly,', 'the drive shaft comprises a first portion inside a gear chamber defined by the housing and a second portion inside a flow chamber defined by the housing, and', 'at least part of the second portion of the drive shaft is conically shaped;, 'removing a first clamping nut that secures rotatably an axial position of a first threaded screw to a drive shaft of the pump assembly, wherein'}removing a second clamping nut that provides pretension to a bushing that envelopes the conically shaped part of the second portion of the drive shaft;loosening the bushing; and the driven shaft comprises a first portion inside the gear chamber and a second portion inside the flow chamber,', 'the first portion of the driven shaft is mechanically coupled to the first portion of the drive shaft through one or more timing gears and configured to receive a rotational force from the drive shaft, and', 'the second portion of the driven shaft is coupled to the second plurality of thread flanks of the second threaded screw intermeshed with the first plurality of thread flanks of the first threaded ...

POSITIVE DISPLACEMENT ROTARY DEVICES

A first rotor configured to rotate adjacent to a second rotor is disclosed. The second rotor includes a circular main body with a first axis of rotation and a vane extending radially from the main body. The first rotor includes a first curved surface that corresponds to a curve swept at a constant radius about a second axis of rotation, a second curved surface that corresponds to a curve swept by a leading edge of the vane when the second rotor is simultaneously rotated about the first axis of rotation and the second axis of rotation, a third curved surface that corresponds to a curve swept by a trailing edge of the vane when the second rotor is simultaneously rotated about the first axis of rotation and the second axis of rotation, and a vane-receiving groove disposed between the second curved surface and the third curved surface. 1. A first rotor , the first rotor being configured to rotate adjacent to a second rotor that comprises a circular main body with a first axis of rotation and a vane extending radially from the main body , the vane having a leading edge and a trailing edge when the second rotor rotates in the clockwise directed , and the first rotor comprising:a substantially circular first curved surface with its center at a second axis of rotation; anda vane-receiving groove disposed in the first curved surface that is configured to receive the vane therein,wherein the first curved surface is dimensioned to maintain substantially the same distance from the main body of the second rotor when adjacent to the main body of the second rotor and the vane-receiving groove is dimensioned to maintain substantially the same distance from a distal end of the leading edge of the vane as the vane moves into the vane-receiving groove and the same distance from a distal end of the trailing edge of the vane as the vane moves out of the vane-receiving groove.220-. (canceled) This continuation-in-part application claims priority from U.S. patent application Ser. No. 13/ ...

Divided Stator Casing

A stator for eccentric screw pumps with a stator casing for an elastomer body for accommodating a rotor, the elastomer body being provided with at least one collar, wherein the collar is disposed in a recess between the stator casing and a connection body, wherein the fixing of the elastomer body in the stator casing is to be improved. The stator casing includes for this purpose open cavities, recesses and/or elevations at least at one side on the end face.

Compressor including laser-hardened bearing surfaces

This disclosure is directed to compressors with hardened bearing surfaces, particularly laser-hardened bearing surfaces. Laser hardening can be used to precisely harden selected areas of the bearing surfaces of the compressor components. By hardening those selected areas, wear resistance can be improved and sliding wear can be reduced. This can result in thrust plates having different material structures configured to contact one another, such as one having a primarily pearlitic microstructure with the opposing thrust plate having a primarily martensitic microstructure. This can reduce adhesive wear by providing dissimilarity on the wearing surfaces.

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 ...

SCROLL COMPRESSOR AND METHOD OF MANUFACTURING THE SAME

A scroll compressor includes a fixed scroll including a spiral unit, an orbiting scroll including a spiral unit and combined with the spiral unit of the fixed scroll to form a compression chamber for compressing refrigerant, a main shaft for transmitting drive power to the orbiting scroll, an electric motor unit configured to rotate the main shaft, and a first balancer for compensating unbalance of the orbiting scroll with respect to a rotation center of the main shaft. The first balancer has an outline in a cylinder shape, and includes a high-density part made of a high-density material, and a low-density part made of a low-density material having a density lower than a density of the high-density material. 1. A scroll compressor comprising:a fixed scroll including a spiral unit;an orbiting scroll including a spiral unit and combined with the spiral unit of the fixed scroll to form a compression chamber for compressing refrigerant;a main shaft for transmitting drive power to the orbiting scroll;an electric motor unit configured to rotate the main shaft; anda first balancer for compensating unbalance of the orbiting scroll with respect to a rotation center of the main shaft,the first balancer having an outline in a cylinder shape, and including a high-density part made of a high-density material, and a low-density part made of a low-density material having a density lower than a density of the high-density material,the low-density part covering an outer peripheral surface of the high-density part.2. The scroll compressor of claim 1 , whereinthe low-density part of the first balancer includes a shaft hole through which the main shaft is provided, a high-density part housing hole for housing the high-density part, and a low-density part fastening hole for fastening with the high-density part,the high-density part of the first balancer includes a high-density part fastening hole for fastening with the low-density part of the first balancer, andpositions of the high- ...

SCROLL COMPRESSOR HAVING WRAP WITH REINFORCING PORTION

A scroll compressor is provided that may include an orbiting scroll having an orbiting wrap, and which performs an orbiting motion; and a fixed scroll having a fixed wrap to form a compression chamber including a suction chamber, an intermediate pressure chamber, and a discharge chamber, by being engaged with the orbiting wrap. A wrap thickness of the fixed wrap may be greater than a wrap thickness of the orbiting wrap within a range which forms the suction chamber. With such a configuration, even if the fixed scroll or the orbiting scroll is thermally-expanded, a transformation of the fixed wrap at a suction side may be prevented. This may prevent a gap between the fixed wrap and the orbiting wrap at an opposite side to the suction side, thereby enhancing compression efficiency. 1. A compressor , comprising:a casing;a drive motor provided in the inner space of the casing;a rotating shaft coupled to the driving motor;an orbiting scroll comprising an orbiting plate portion coupled to the rotating shaft, and a orbiting wrap extending along a circumference direction of the orbiting plate portion;a fixed scroll comprising a fixed wrap provided in engagement with the orbiting wrap to compress a refrigerant, a fixed plate portion including an inlet receiving the refrigerant and an outlet spaced apart from the suction opening to discharge the refrigerant;wherein the fixed wrap includes a reinforcement part in which a specific area is thicker than an area adjacent to thereto, wherein the reinforcement part is provided in at least part of an area between the rotation shaft and the inlet.2. The compressor according to claim 1 , wherein the reinforcement part is provided in an area where the fixed wrap and the inlet are faced each other.3. The compressor according to claim 1 , wherein the reinforcement part is formed as protrude on at least one of the inner surface and the outer surface of the fixed wrap.4. The compressor according to claim 3 , wherein the reinforcement part ...

VACUUM PUMP, SCROLL PUMP, AND MANUFACTURING METHOD FOR SUCH

The invention relates to a scroll pump comprising a pressure sensor integrated into the scroll pump. 1. A scroll pump , which is a vacuum pump , comprising a pressure sensor integrated into the scroll pump.2. A scroll pump in accordance with claim 1 , wherein the pressure sensor is integrated into a control of the scroll pump and/or of a vacuum system.3. A scroll pump in accordance with claim 1 , wherein the pressure sensor is provided for measuring a suction pressure of the scroll pump or a pressure between two pump-active spiral walls.4. A scroll pump in accordance with claim 1 , wherein the pressure sensor is screwed into a component of the scroll pump.5. A scroll pump in accordance with claim 1 , wherein the pressure sensor is arranged in a cooling air flow of a cooling device of the scroll pump.6. A vacuum pump claim 1 , in particular a scroll pump claim 1 , comprising:a fan controllable in its rotational speed for cooling the vacuum pump;a temperature sensor; anda control device that is configured to regulate the rotational speed of the fan in dependence on a power consumption of a drive of the vacuum pump and on a temperature measured by the temperature sensor.7. A vacuum pump in accordance with claim 6 , wherein the regulation takes place in dependence on a temperature of a motor claim 6 , of a motor winding claim 6 , of drive electronics claim 6 , of a pump body claim 6 , and/or of a housing of the vacuum pump claim 6 , measured by the temperature sensor.8. A vacuum pump in accordance with claim 6 , wherein a first threshold value of the temperature is defined claim 6 , and wherein the regulation only takes place at a measured temperature above the first threshold value claim 6 , and/or wherein the rotational speed of the fan is kept constant at zero or at a minimum rotational speed below the first threshold value.9. A vacuum pump in accordance with claim 6 , wherein a second threshold value of the temperature is defined claim 6 , and wherein the rotational ...

TOLERANCE INDEPENDENT CRESCENT INTERNAL GEAR PUMP

A crescent internal gear pump includes a front cover, an end cover, a ring gear and a pinion gear disposed within a gear housing in an eccentric, intermeshing relationship. The housing is disposed intermediate the front cover and the end cover. A crescent is disposed radially intermediate the ring gear and the pinion gear. The crescent partially extends into a correspondingly shaped slot in the end cover. The gear housing, the ring gear, and the pinion gear can have substantially the same thickness. A shim can be disposed intermediate the end cover and the gear housing for establishing a desired clearance therebetween. 1. A method of manufacturing a crescent internal gear pump having a gear housing , a ring gear , a pinion gear , a front cover , and an end cover , the method comprising:providing the gear housing, the ring gear, the pinion gear, the front cover, and the end cover as separate components, wherein the gear housing, the ring gear, the pinion gear, the front cover, and the end cover all have substantially the same thickness; andproviding the crescent with a length is greater than the thicknesses of the gear housing, the ring gear, and the pinion gear.2. The method of claim 1 , comprising providing the end cover with a slot shaped to receive the crescent.3. The method of claim 1 , comprising match grinding the gear housing claim 1 , the ring gear claim 1 , and the pinion gear to achieve the substantially same thickness.4. The method of claim 1 , comprising inserting a first portion of the crescent into a correspondingly shaped slot in the end cover claim 1 , wherein a length of a second portion of the crescent that protrudes from the slot is greater than the thicknesses of the gear housing claim 1 , the ring gear claim 1 , and the pinion gear.5. The method of claim 4 , comprising disposing a biasing member in the slot claim 4 , the biasing member configured to bias the crescent away from the end cover.6. The method of claim 4 , comprising preliminarily ...

AIR COMPRESSOR

An air compressor contains: a torque gear on which a central orifice and a connection rod are arranged. The central orifice has screw threads defined thereon and corresponds to one of multiple positioning orifices of a base, the one positioning orifice is configured to accommodate a bearing, and a screw bolt is inserted through the bearing in the base so as to screw with the central orifice via the torque gear. The connection rod of the torque gear is rotatably connected with a piston so that the piston moves in a cylinder to produce compressed air, the torque gear matingly contacts with the bearing along the screw bolt, and the bearing is not broken in the one positioning orifice, thus moving the piston in the cylinder reciprocately. 1. An air compressor comprising:a base including multiple positioning orifices, one of which accommodates a bearing;a cylinder connected on the base and including an air storage seat communicating on the cylinder; anda transmission mechanism driving a piston to reciprocately move in the cylinder, thus compressing air;wherein the transmission mechanism including a torque gear and a central orifice defined on the torque gear, and the transmission mechanism further including a connection rod extending from the torque gear, wherein the central orifice has screw threads formed therein, and the central orifice of the torque gear corresponds to the bearing in the one positioning orifice of the base, and a screw bolt is screwed with the central orifice after being inserted through the bearing and the torque gear, thus connecting the transmission mechanism automatedly;wherein the connection rod of the torque gear is rotatably connected with the piston.2. The air compressor claim 1 , as claimed in claim 1 , wherein the base includes multiple positioning orifices which are a first positioning orifice and a second positioning orifice claim 1 , a drive gear inserted through the first positioning orifice and mounted on a center of an end of the ...

Motor operated compressor

A motor operated compressor includes: a main housing having a motor chamber; a frame provided on one side of the motor chamber and coupled to the main housing; a fixed scroll coupled to one side surface of the frame; an orbiting scroll provided to perform an orbiting movement between the frame and the fixed scroll, and form a compression chamber along with the fixed scroll; a sealing member provided on one side surface of the orbiting scroll to form a back pressure chamber between the orbiting scroll and the frame; and a plate provided between the frame and the fixed scroll and between the frame and the orbiting scroll, where the plate includes a sealing portion at least part of which is positioned between the frame and the fixed scroll; and a sliding portion extended from the sealing portion and positioned between the frame and the orbiting scroll.

VANE PUMP

A vane pump is provided with: a pump housing having an accommodating concave portion; and a pump cartridge accommodated in the accommodating concave portion, wherein the pump cartridge has: a rotor; a plurality of vanes received in a plurality of slits formed in the rotor; a cam ring formed with a cam face on an inner circumference of the cam ring; and a first side plate provided at the opposite side from a bottom surface of the accommodating concave portion such that the cam ring is located therebetween, the first side plate has a first projected portion projected radially outward, and the pump cartridge is anchored to the pump housing via the first projected portion. 1. A vane pump configured to discharge working fluid by being rotationally driven by a driving source , comprising:a pump housing having an accommodating concave portion; anda pump cartridge accommodated in the accommodating concave portion, wherein a rotor to which a rotational driving force from the driving source is transmitted;', 'a plurality of vanes freely slidably received in a plurality of slits, the slits being formed in the rotor in a radiating pattern;', 'a cam ring formed with a cam face on an inner circumference of the cam ring, the cam face being configured such that tip ends of the plurality of vanes slide on the cam face as the rotor is rotated; and', 'a first side plate provided on an opposite side from a bottom surface of the accommodating concave portion such that the cam ring is located therebetween,, 'the pump cartridge hasthe first side plate has a first projected portion projected radially outward, andthe pump cartridge is anchored to the pump housing via the first projected portion.2. The vane pump according to claim 1 , further comprisingan annular member fitted into an annular groove, the annular groove being formed in an inner circumferential surface of the accommodating concave portion, whereinthe annular member comes into contact with the first projected portion at an ...

Screw Spindle Pump

The invention relates to a screw spindle pump, with a housing () which surrounds a delivery chamber (), two spindles (), namely a drive spindle () and an opposed running spindle (), a housing insert () which is arranged in the housing () and in which the spindles () are accommodated, at least one bearing element (), which is connected to the housing insert () and on which bearings () of the spindles () are arranged, and with at least one housing cover (), closing a housing opening. It is the object of the invention to provide a screw spindle pump at which maintenance and inspection work can be carried out more simply and cost-effectively. The invention achieves this object in that the bearing element () together with the housing insert () and the spindles () accommodated therein forms a unit () which, after the housing cover () is taken off, is removable from the housing () through the housing opening. 12578786278131361278141413136781514142. A screw spindle pump , with a housing () which surrounds a delivery chamber () , two spindles ( , ) , namely a drive spindle () and an opposed running spindle () , a housing insert () which is arranged in the housing () and in which the spindles ( , ) are accommodated , at least one bearing element (′ , ″) , which is connected to the housing insert () and on which bearings () of the spindles ( , ) are arranged , and with at least one housing cover (′ , ″) , closing a housing opening , characterized in that the bearing element (′ , ″) together with the housing insert () and the spindles ( , ) accommodated therein forms a unit () which , after the housing cover (′ , ″) is taken off , is removable from the housing () through the housing opening.21414152. The screw spindle pump as claimed in claim 1 , wherein the housing cover (′ claim 1 , ″) keeps the unit () in its axial position in the housing ().31313. The screw spindle pump as claimed in claim 1 , wherein the bearing element (′ claim 1 , ″) is designed as a bearing cover claim ...

Scroll fluid machine

Provided is a scroll fluid machine that makes it possible to attenuate the bending stress applied to the base of a wall body having an inclined section. The scroll fluid machine is provided with a wall body inclined section in which the distance between the facing surfaces of an end plate of a fixed scroll and an end plate of a rotating scroll that face each other continuously decreases from the outer circumferential side toward the inner circumferential side. A mesh clearance that is a gap between wall bodies formed when the wall bodies mesh with each other is larger on the outer circumferential side of the inclined section than on the inner circumferential side of the inclined section. The mesh clearance is made larger by drawing the wall surface of a wall body further back toward the central side of the wall body in the thickness direction than the original wall surface profile thereof.

Twin rotor devices with internal clearances reduced by a coating after assembly, a coating system, and methods

A method of treating, tuning, assembling, and/or overhauling a twin rotor device includes applying a coating material on an internal set of working surfaces of the twin rotor device when at least partially assembled. The coating may be factory or field applied to a new or used twin rotor device. The working surfaces may be uncoated or previously coated and may be built-up as the coating material forms a coating on at least some of the working surfaces. Manufacturing variations of a pair of rotors and a housing may be compensated by the coating. One or more performance characteristics of the twin rotor device may be improved by the coating, and variation between a series of twin rotor device may be reduced or substantially eliminated. The coating may reduce internal leakage and increase volumetric efficiency of the twin rotor device. The twin rotor device may be a supercharger 200, a screw compressor 1200, or other twin rotor device.

SCROLL COMPRESSOR

A scroll compressor is provided which includes: a revolving scroll, a fixed scroll, an autorotation preventing mechanism, a frame, a crank shaft provided with an eccentric pin portion which is eccentric with respect to an axis, the crank shaft being provided with a flange portion at a lower portion of the eccentric pin portion, the flange portion being larger than the diameter of the eccentric pin portion, a balance weight mounted on the flange portion, a sealing member performing sealing between the revolving scroll and the flange portion, and a thrust bearing arranged between the frame and the flange portion. The scroll compressor reduces the amount of oil flowing into a back pressure chamber, thereby improving the performance of the scroll compressor. 1. A scroll compressor , comprising:a crank shaft including an eccentric pin portion eccentric from an axial center;a revolving scroll having a scroll shape on a bedplate and connected to the eccentric pin portion;a fixed scroll having a scroll shape that engages with the scroll shape of the revolving scroll;an autorotation preventing mechanism that prevents the revolving scroll from autorotating;a frame that houses the revolving scroll and the autorotation preventing mechanism, rotatably supports the crank shaft with a bearing, and fixes the fixed scroll, wherein the crank shaft includes a flange portion having a larger diameter than a diameter of the eccentric pin portion and arranged at a lower portion of the eccentric pin portion;a balance weight that is mounted on the flange portion to cancel imbalance caused by rotational movement of the eccentric pin portion and revolution movement of the revolving scroll;a sealing member that provides sealing between the revolving scroll and the flange portion; anda thrust bearing provided between the frame and the flange portion.2. The scroll compressor according to claim 1 ,wherein a space adjacent to the flange portion is partitioned, by the sealing member and the thrust ...

Flexible impeller pump

The present invention relates to improvements in the area of flexible impeller pumps. In particular, the present invention relates to flexible impellers with improved profiles(such as dual sealing lips), which are particularly well-suited to multiple cam pumps. A novel mounting hub configuration for mounting an impeller on a drive shaft is also provided. Pumps comprising such impellers and/or mounting hubs are provided, as are associated methods of installation and removal.

Internal Gear Pump

An internal gear pump with a field replaceable idler is disclosed that may be used for sanitary applications. Access to the idler mainly requires removal of the head. Access to the seal assembly disposed at the inboard end of the pump chamber is also fast and easy as removal of the head exposes a fastener that secures the rotor to the drive shaft. Removal of this fastener enables the rotor to be removed with a standard rotor pulling tool thereby exposing the pump chamber seal assembly which may be cleaned, serviced or replaced as needed. 1. A pump comprising:a bracket including an inboard end, an outboard end and a through hole extending between the inboard and outboard ends;the outboard end of the bracket being coupled to an inboard end of a case, the inboard end of the case including an opening, the case further including an open outboard end that is covered by and coupled to a head, the case and head defining a pump chamber, the inboard end of the case further including an annular recess that surrounds the opening and that receives a seal assembly;a shaft including an inboard end and an outboard end, the shaft passing through the through hole of the bracket, the outboard end of the shaft passing through the seal assembly and the inboard end of the case before being detachably coupled to a rotor, the rotor being received in the pump chamber;the head being sealably and detachably coupled to a dowel, the dowel being coaxially received in and coupled to an idler that is disposed in the pump chamber;whereby removal of the head and rotor providing access to the seal assembly through the open outboard end of the case and removal of the head providing access to the idler.2. The pump of wherein the dowel includes an inboard end disposed axially within the idler and an outboard end that is coupled to the head with a fastener claim 1 ,the pump further comprising a seal disposed between the dowel and the head that isolates the fastener from the pump chamber.3. The pump of ...

Pumping fluid delivery systems and methods using force application assembly

A method of dispensing a therapeutic fluid from a line includes providing an inlet line connectable to an upstream fluid source. The inlet line is in downstream fluid communication with a pumping chamber. The pumping chamber has a pump outlet. The method also includes actuating a force application assembly so as to restrict retrograde flow of fluid through the inlet while pressurizing the pumping chamber to urge flow through the pump outlet. A corresponding system employs the method.

Screw spindle pump

A screw spindle pump for delivering a cooling liquid for cooling a battery and/or power electronics or a cleaning or supply liquid of a motor vehicle, including a housing in which a working spindle, which is coupled to a drive assembly, and at least one running spindle, which meshes with the latter, are accommodated, and including a feather key-like support element, which is fixed by the housing and against which the working spindle and the running spindle are axially supported. In the housing, there is provided at least one aperture through which it is possible to insert the support element, which, in the assembled position, is received with one end in the aperture and with the other end in a receiving part situated diametrically opposite the aperture, wherein the support element is secured via at least one securing element which closes the aperture at the outside.

Screw-Spindle Pump, Fuel Delivery Assembly, and Fuel Delivery Unit

A screw-spindle pump includes: a first (drive) screw spindle and a second (running) screw spindle that runs oppositely with respect to the first screw spindle; and a pump housing configured to receive the first and second screw spindles. The first and second screw spindles form, together with at least the pump housing, delivery chambers, which move from a suction side of the pump to a pressure side of the pump due to a rotation of the first and second screw spindles. The pump housing has a first abutment insert for the first screw spindle and a second abutment insert for the second screw spindle, and at least one of the first and second abutment inserts is set angled with respect to a first plane of the pump, to counteract operationally induced crossing of the first and second screw spindles. 120-. (canceled)21. A screw-spindle pump (P) comprising:{'b': 2', '4', '2', '4', '2, 'a first screw spindle () and a second screw spindle (), wherein the first screw spindle () is a drive spindle and the second screw spindle () is a running spindle that runs oppositely with respect to the first screw spindle (); and'}{'b': 6', '2', '4, 'a pump housing () configured to receive the first and second screw spindles (, ),'}{'b': 2', '4', '6', '10', '12', '14', '2', '4, 'wherein the first and second screw spindles (, ) form, together with at least the pump housing (), delivery chambers (), which move from a suction side () of the pump (P) to a pressure side () of the pump (P) as a consequence of a rotation of the first and second screw spindles (, ),'}{'b': 6', '16', '2', '18', '4, 'wherein the pump housing () has a first abutment insert () for the first screw spindle () and a second abutment insert () for the second screw spindle (), and'}{'b': 16', '18', '2', '4, 'sub': 1', '2, 'wherein at least one of the first and second abutment inserts (, ) is set angled (α, α) with respect to a first plane (X-Z) of the pump (P), so as to counteract operationally induced crossing of the first ...

CRANKSHAFT MOUNTED COMPRESSOR

A system including an engine block and a crankshaft able to rotate around axis A, and a compressor with a rotor, the rotor mounted coaxially to the crankshaft such that the crankshaft drives the rotor. The system can be part of an engine for a vehicle, and the compressor can be an air compressor which is able to supply compressed air for engine systems. 1. A system for a vehicle , the system comprising:an engine block and a crankshaft able to rotate around axis A, anda compressor with a rotor mounted coaxially and directly to the crankshaft such that the crankshaft drives the rotor.2. The system of claim 1 , wherein the crankshaft has a first end claim 1 , and the rotor is mounted at or near the first end.3. The system of claim 1 , wherein the compressor is mounted adjacent to the engine block.4. The system of claim 1 , wherein the compressor comprises a housing claim 1 , an inlet and an outlet.5. The system of claim 4 , wherein the housing is mounted to the engine block.6. The system of claim 4 , wherein the housing is mounted to the engine block with bolts. The system of claim 4 , wherein the housing is integral with the engine block.87. The system of claim claim 4 , wherein the housing comprises a lid.9. The system of claim 1 , wherein the rotor is mounted to the crankshaft via one or more of the following: a shrink fit claim 1 , a splined connection claim 1 , a friction gasket claim 1 , a press-fit claim 1 , and a friction washer.10. The system of claim 1 , wherein the compressor is a low profile vane compressor.11. The system of claim 1 , further comprising one or more seals.12. A method claim 1 , comprising:providing an engine block with a crankshaft; andmounting a compressor with a rotor to the crankshaft directly to and coaxially with the crankshaft such that crankshaft rotation directly drives the rotor.13. The method of claim 12 , further comprising mounting a housing of the compressor to the engine block.14. The method of claim 12 , further comprising ...

SCROLL COMPRESSOR INCLUDING AN ELECTRICAL BOX CONTAINING A WIRE GUIDING PART

The scroll compressor () includes a hermetic casing (); an electric motor () arranged within the hermetic casing (); an electrical box () attached to an outer surface of the hermetic casing (); and compressor power terminals () insulated from the hermetic casing () and electrically connected to the electric motor (), the compressor power terminals () protruding in the electrical box (), the electrical box ()] containing a control module () configured to control the electric motor (), control wires () connected to the control module (), and a terminal block assembly () configured to electrically connect the compressor power terminals () and the control wires () to external power leads () of an external power source. The terminal block assembly () includes a body part () and a wire guiding part () which is configured to guide and position the control wires () in predetermined connection positions with respect to the body part (). 1. A scroll compressor including a hermetic casing , a compression unit arranged within the hermetic casing and including a first scroll and a second scroll , an electric motor arranged within the hermetic casing and configured to drive the second scroll relative to the first scroll , an electrical box attached to an outer surface of the hermetic casing , and compressor power terminals insulated from the hermetic casing and electrically connected to the electric motor , the compressor power terminals protruding in the electrical box , the electrical box containing a control module which is configured to control the electric motor , control wires which are connected to the control module , and a terminal block assembly configured to electrically connect the compressor power terminals and the control wires to external power leads of an external power source , wherein the terminal block assembly comprises a body part and a wire guiding part which is configured to guide and position the control wires in predetermined connection positions with ...

SIMPLIFIED ROOTS-TYPE BLOWER

The present disclosure relates to a simplified roots-type blower having an improved sound signature. The roots-type blower includes a rotor bore housing having a molded, one-piece polymeric construction. The rotor bore housing defines a first rotor bore and a second rotor bore. The rotor bore housing also defines a first bearing pocket corresponding to the first rotor bore and a bearing pocket corresponding to the second rotor bore axis. The rotor bore housing further defining a timing gear chamber. 1. A Roots blower comprising:a rotor bore housing having a molded, one-piece polymeric construction to define a full thickness of the housing, defining a first rotor bore with a first inner surface formed by the polymeric construction and defining a second rotor bore with a second inner surface formed by the polymeric construction;a first Roots rotor having a first rotor shaft aligned along a first rotor axis and a second Roots rotor having a second rotor shaft aligned along a second rotor bore axis, the first and second Roots rotors being respectively positioned within the first and second rotor bores, the first and second Roots rotors being rotatable relative to the rotor bore housing about their respective first and second rotor axes, the first and second rotor bore axes being relatively positioned such that the first and second Roots rotors intermesh with one another when the first and second Roots rotors are rotated about their respective first and second rotor axes, the first rotor shaft being supported by the first bearing and the second rotor shaft being supported by the second bearing.2. The Roots blower of claim 1 , wherein the first and second rotor bores each have a draft angle less than 2 degrees.3. The Roots blower of claim 1 , wherein the first and second rotor bores each have a draft angle equal to zero.4. The Roots blower of claim 1 , wherein the molded polymeric construction includes a polymeric base material and reinforcing fibers embedded within the ...

Scroll Vacuum Pump Having External Axial Adjustment Mechanism

A vacuum type of scroll pump includes a frame, a stationary plate scroll, an orbiting plate scroll, a non-energized type of tip seal or seals, an eccentric drive mechanism assembled to and supported by the frame and to which the orbiting plate scroll is assembled so as to be drivable by the eccentric drive mechanism in an orbit about a longitudinal axis of the pump, and a mechanism for adjusting the seal(s) created by the tip seal(s) without having to disassemble any of the frame, plate scrolls or parts of the eccentric drive mechanism from one another, i.e., while a pump head assembly of the pump remains intact.

TWIN ROTOR DEVICES WITH INTERNAL CLEARANCES REDUCED BY A COATING AFTER ASSEMBLY, A COATING SYSTEM, AND METHODS

A method of treating, tuning, assembling, and/or overhauling a twin rotor device () includes applying a coating material () on an internal set of working surfaces () of the twin rotor device when at least partially assembled. The coating may be factory or field applied to a new or used twin rotor device. The working surfaces may be uncoated or previously coated and may be built-up as the coating material forms a coating () on at least some of the working surfaces. Manufacturing variations of a pair of rotors () and a housing () may be compensated by the coating. One or more performance characteristics of the twin rotor device may be improved by the coating, and variation between a series of twin rotor device may be reduced or substantially eliminated. The coating may reduce internal leakage and increase volumetric efficiency of the twin rotor device. The twin rotor device may be a supercharger , a screw compressor , or other twin rotor device. 12001200. A method of treating a twin rotor device ( , ) , the method comprising:{'b': 220', '1220', '210', '1210', '202', '204', '1202', '1204', '204', '202', '1204', '1202', '218', '222', '224', '226', '228', '1218', '1222', '1224', '1226', '1228, 'providing the twin rotor device, the twin rotor device including a pair of rotors (, ) and a housing (, ) with a first port (, , , ) and a second port (, , , ), the rotors and the housing defining a set of working surfaces (, , , , , , , , , ) adapted to interface with each other; and'}{'b': 102', '206', '1206, 'inducing a coating material () to flow from the first port toward the second port of the housing and thereby depositing at least some of the coating material as a coating (, ) on at least some of the working surfaces.'}220212022041204. The method of claim 1 , wherein the first port is an inlet ( claim 1 , ) of the twin rotor device and wherein the second port is an outlet ( claim 1 , ) of the twin rotor device.320412042021202. The method of claim 1 , wherein the first port ...

Load Balanced Power Section of Progressing Cavity Device

A progressing cavity device operates as a motor to impart torque to a bit. A stator of the device defines an internal profile having uphole stages with a first dimension being less than a second dimension of downhole stage. A rotor has an external profile with a constant outer dimension along its length. Disposed in the stator, the rotor defines cavities with the stator and is rotatable with pumped fluid progressing in the cavities from the uphole to downhole to transfer torque to the drive toward the downhole end. Although the rotor is subjected at the downhole end to a reactive torque from the bit, the interference fit of the rotor's constant dimension with the stator's downhole stages is less than with the uphole stages, which can mitigate issues with heat buildup in the downhole stages. The device can also operates as a progressing cavity pump. 1. A progressing cavity device for imparting a first torque to a drive using fluid pumped along a tubular , the device comprising:a housing coupling in fluid communication with the tubular, the housing having an uphole end and a downhole end and defining a bore therethrough;a stator lining disposed in the bore of the housing and defining an internal profile along a first length of the stator lining, the internal profile at least having a first portion toward the uphole end of the housing with a first internal dimension being less than a second internal dimension of at least a second portion toward the downhole end of the housing; anda rotor having an external profile along a second length of the rotor and disposed in the internal profile of the stator lining, the rotor defining a plurality of sealed stage cavities with the stator lining, the rotor being torqued in the stator lining in response to the pumped drilling fluid progressing in the sealed stage cavities from the uphole end to the downhole end and transferring the first torque to the drive toward the downhole end, the external profile having an outer dimension ...

Pump System

A pump system includes a pump, a mounting bracket, and three fastener assemblies. The pump includes a housing having three pump attachment features. The mounting bracket includes three bracket attachment features. The three fastener assemblies are each coupled to one of the pump attachment features and to one of the bracket attachment features to form an attachment. Each of three extend through the pump attachment feature, the bracket attachment feature, and the fastener assembly at each attachment. The three attachment axes are perpendicular to each other.

ADJUSTABLE SCROLL PUMP

The invention provides a scroll pump comprising an orbiting scroll and a fixed scroll, wherein the orbital axis of the orbiting scroll is movable in a radial direction relative to the fixed scroll while the orbiting scroll is orbiting about its orbital axis, or wherein the fixed scroll is movable relative to the orbiting scroll in a radial direction while the orbiting scroll is orbiting about its orbital axis. 1. A scroll pump comprising an orbiting scroll and a fixed scroll , wherein the orbital axis of the orbiting scroll is movable in a radial direction relative to the fixed scroll while the orbiting scroll is orbiting about its orbital axis , or wherein fixed scroll is movable relative to the orbiting scroll in a radial direction while the orbiting scroll is orbiting about its orbital axis.2. The scroll pump according to wherein the scroll pump further comprises a first bearing coupled to a drive shaft for driving the orbiting scroll claim 1 , wherein the first bearing is movable with drive shaft in a direction substantially perpendicular to a rotational axis of the drive shaft.3. The scroll pump according to wherein the first bearing is coupled to a housing element of the scroll pump claim 2 , the housing element being movable relative to the fixed scroll while the drive shaft is rotating.4. The scroll pump according to wherein the movable housing element may have its position relative to the fixed scroll selectively fixed.5. The scroll pump according to further comprising a second bearing claim 2 , the second bearing being coupled to the drive shaft and to a bearing carrier which is flexible in an axial direction.6. The scroll pump according to wherein the first bearing is located in a position from a substantially distal end of the drive shaft to substantially adjacent the fixed scroll.7. A scroll chamber for a scroll pump claim 2 , the scroll chamber containing an orbiting scroll and a fixed scroll each comprising an axially extending scroll wall claim 2 , ...

SCROLL COMPRESSOR

A scroll compressor, includes: a scroll compression mechanism including an orbiting scroll, a fixed scroll, and a thrust plate supporting a load of the orbiting scroll in a thrust direction; a back-pressure application mechanism that applies, as back pressure, the refrigerant gas compressed by the scroll compression mechanism to a rear surface of the thrust plate; and a floating amount restriction mechanism that restricts an amount of floating of the thrust plate caused by the back pressure. The floating amount restriction mechanism includes a restriction pin that includes a shaft part and a head part, and locks the thrust plate to the head part to restrict the amount of floating. The shaft part passes through the thrust plate and has a front end part fixed to a front housing, and the head part has a diameter larger than a diameter of the shaft part. 16.-. (canceled)7. A scroll compressor , comprising:a scroll compression mechanism including an orbiting scroll, a fixed scroll, and a thrust plate, the fixed scroll facing the orbiting scroll to form a compression chamber, the compression chamber compressing refrigerant gas, and the thrust plate supporting a load of the orbiting scroll in a thrust direction;a back-pressure application mechanism that applies, as back pressure, the refrigerant gas compressed by the scroll compression mechanism to a rear surface of the thrust plate;a floating amount restriction mechanism that restricts an amount of floating of the thrust plate caused by the back pressure; anda housing that houses the scroll compression mechanism, the back-pressure application mechanism, and the floating amount restriction mechanism, whereinthe floating amount restriction mechanism includes a restriction pin that includes a shaft part and a head part and locks the thrust plate to the head part to restrict the amount of floating, the shaft part penetrating through the thrust plate and having a front end part fixed to the housing, and the head part being ...

VARIABLE DISPLACEMENT PUMP HAVING ROTATING CAM RING

Vane pump mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring is supported by a journal bearing. A relatively low sliding velocity is imposed between the cam ring and the vanes). This permits the use of less expensive and less brittle materials in the pump by allowing the pump to operate at much higher speeds without concern for exceeding vane tip velocity limits. 1. A pump comprising:a housing having a cavity, at least a portion of the cavity forming a pump chamber;a shaft;a rotor received in the pump chamber and operatively driven by the shaft for rotation relative to the housing;at least one vane extending radially outward from the rotor;an annular cam ring received around the rotor and mounted for rotation relative to the housing, and relative to the rotor;a cam sleeve received around the cam ring; andan actuator assembly including first and second piston actuators operatively engaging the cam sleeve and selectively moving a centerpoint of the cam sleeve relative to the housing to alter the displacement of the pump.2. The pump of wherein the first and second piston actuators are disposed in opposing relation.3. The pump of wherein the first and second piston actuators engage first and second lobes claim 2 , respectively claim 2 , extending from the cam sleeve.4. The pump of wherein the first and second lobes extend from a peripheral region of the cam sleeve and the piston actuators move along a tangential region relative to the cam sleeve.5. The pump of wherein the cam sleeve is secured against rotation relative to the housing by a pin located at region diametrically opposite the tangential region.6. The pump of further comprising a spacer sleeve interposed between the cam sleeve and the housing claim 5 , the cam sleeve secured to the spacer ring with the pin for selective pivoting movement relative thereto.7. The pump of wherein the at ...

CO-ROTATING SCROLL COMPRESSOR AND METHOD FOR DESIGNING THE SAME

A co-rotating scroll compressor includes a driving-side scroll member (), a driven-side scroll member (), a pin ring mechanism (), a driving-side bearing () that rotatably supports the driving-side scroll member (), and a driven-side bearing () that rotatably supports the driven-side scroll member (). A center of gravity of at least one of the driving shaft (), the driving-side scroll member (), and the driven-side scroll member () is shifted from rotation centers (CL CL) by a predetermined distance. The predetermined distance is set so that a total bearing load obtained by centrifugal force and fluid compression that is 5% of a dynamic load rating of the driving-side bearing () and the driven-side bearing () or more is generated. 1. A co-rotating scroll compressor , comprising:a driving shaft driven by a drive unit so as to rotate;a driving-side scroll member connected to the driving shaft, and comprising a plurality of spiral driving-side walls provided about a center of a driving-side end plate at predetermined angular intervals;a driven-side scroll member comprising spiral driven-side walls, the driven-side walls being provided about a center of a driven-side end plate at predetermined angular intervals and in a number corresponding to the driving-side walls, the driven-side walls being engaged with the corresponding driving-side walls so as to form a compression space;a synchronous driving mechanism that transmits driving force from the driving-side scroll member to the driven-side scroll member so that the driving-side scroll member and the driven-side scroll member rotationally move in a same direction at a same angular velocity;a driving-side bearing that rotatably supports the driving-side scroll member; anda driven-side bearing that rotatably supports the driven-side scroll member, wherein:a center of gravity of at least one of the driving shaft, the driving-side scroll member, or the driven-side scroll member is shifted from a rotation center by a ...

SELF ADJUSTING GEAR PUMP

A self-adjusting gear pump is disclosed. The pump may be a crescent internal gear pump, a gerotor pump, or an external gear pump. The pump includes a pump housing, gear housing, first and second gears, a side plate housing with a side plate, a shim and an end plate. The side plate moves between a first position contacting the first and second gears and gear housing, and a second position contacting the end plate. The side plate is spring biased toward the first position. A method is disclosed for match grinding the crescent plate (if used), gear housing and gears as a unit to provide a uniform surface. The side plate housing and side plate are similarly match ground. An assembly method is disclosed which allows the crescent plate to be moved with respect to the gear housing so that clearances between the crescent and the gear teeth are eliminated.

OIL PUMP AND SCROLL COMPRESSOR

The present invention provides a vertical, axial flow oil pump (). The oil pump includes: a casing (), the casing having a cylindrical shape as a whole and being able to rotate around its own central axis (O); a suction port (), located at a lower end of the casing in an axial direction, and configured to suck oil into the oil pump; a discharge port (), located at an upper end of the casing in the axial direction, and configured to discharge the oil from the oil pump to outside; and an impeller (), provided in and formed integrally with the casing. The impeller rotates together with the casing when the casing rotates, so that the oil is flowed from the suction port to the discharge port. The present invention also provides a scroll compressor having the oil pump. 1. An oil pump , comprising:a casing, the casing having a cylindrical shape as a whole and being able to rotate around its own central axis;a suction port, located at a lower end of the casing in an axial direction, and configured to suck oil into the oil pump;a discharge port, located at an upper end of the casing in the axial direction, and configured to discharge the oil from the oil pump to outside; andan impeller, provided in and formed integrally with the casing, wherein, the impeller rotates together with the casing when the casing rotates, so that the oil is flowed from the suction port to the discharge port.2. The oil pump according to claim 1 , wherein the impeller comprises:a central body, located at a center of the impeller and having a cylindrical shape as a whole, a central axis of the central body being collinear with the central axis of the casing; anda plurality of blades, arranged at equal intervals on an outer circumference of the central body, and a surface of each blade being inclined with respect to the central axis of the casing.3. The oil pump according to claim 2 , wherein a radial root of each blade is fixedly connected to the outer circumference of the central body claim 2 , and a ...

SCROLL COMPRESSOR

A scroll compressor includes: a frame configured to support a second scroll by being coupled to a first scroll; a sealing member insertion groove formed in a ring shape, on at least one of one side surface of the second scroll and one side surface of the frame contacting the second scroll; and a sealing member formed in a ring shape, inserted into the sealing member insertion groove, and configured to divide an interval between the second scroll and the frame in a radial direction, wherein the sealing member is formed such that a sectional surface of an inner circumferential surface thereof is smaller than that of an outer circumferential surface thereof, and such that a second gap between the outer circumferential surface of the sealing member and an outer side wall surface of the sealing member insertion groove is smaller than or equal to a first gap between the inner circumferential surface of the sealing member and an inner side wall surface of the sealing member insertion groove. 1. A scroll compressor , comprising:a first scroll;a second scroll which forms a compression chamber together with the first scroll while performing an orbiting movement with respect to the first scroll;a frame configured to support the second scroll by being coupled to the first scroll;a sealing member insertion groove formed in a ring shape, on at least one of one side surface of the second scroll and one side surface of the frame contacting the second scroll; anda sealing member formed in a ring shape, inserted into the sealing member insertion groove, and configured to divide an interval between the second scroll and the frame in a radial direction,wherein the sealing member is formed such that a sectional surface of an inner circumferential surface thereof is smaller than that of an outer circumferential surface thereof, and such that a second gap between the outer circumferential surface of the sealing member and an outer side wall surface of the sealing member insertion groove ...

Improved stator assembly for progressive cavity pumping systems

A stator for use in a progressive cavity pump is provided, comprising a housing having a suction end and a discharge end, and an elastomeric liner disposed within the housing that defines a passageway for receiving a rotor of the pump. The elastomeric liner comprises a reinforced component that is proximate to the discharge end and that provides a landing surface to resist passage of a rotor head through the passageway.

Pump Seal Lubricator

The disclosed invention modifies existing centrifugal pump design by replacing a compression seal with a mechanical seal and lubricant reservoir. The mechanical seal creates a sealed chamber to lubricate the rotating shaft. The rotating shaft is covered in a shaft sleeve that facilitates the flow of lubricant to and from the sealed chamber. This improvement provides independent lubrication to the centrifugal pump to protect against seal failure. 1. A system for lubricating a centrifugal pump , comprising:a shaft sleeve circumscribing a section of a rotating shaft within a stuffing box; anda lubricant reservoir in communication with said shaft sleeve;wherein the rotation of said shaft sleeve facilitates the flow of lubricant through said lubricant reservoir; andwherein said stuffing box comprises a stuffing box throat with a stuffing box throat proximal end and a stuffing box throat distal end.2. The system of claim 1 , further comprising:a stationary shaft seal coupled to said stuffing box throat;a rotating shaft seal coupled to said shaft sleeve; andan oil and grease seal coupled to said stuffing box throat distal end;wherein said rotating shaft seal acts on said stationary shaft seal to form a mechanical seal; andwherein said mechanical seal and said oil and grease seal form a sealed chamber for said lubricant to interface with said shaft sleeve.3. The system of claim 1 , wherein said shaft sleeve further comprises at least one indentation to alter the flow of said lubricant through said lubricant reservoir.4. A centrifugal pump comprising:a centrifugal pump housing; a stuffing box throat extending away from said centrifugal pump housing;', a stuffing box throat constriction;', 'a stuffing box throat aperture;', 'a stuffing box throat proximal end; and', 'a stuffing box throat distal end;, 'wherein said stuffing box throat further comprises], 'a stuffing box coupled to said centrifugal pump housing, further comprisingan impeller located within said centrifugal ...

Electric gerotor pump and method for producing same

An electrically driven gerotor pump has a gerotor which comprises a stationary outer gerotor element with an inner toothing that is axially delimited by two chamber walls, wherein each chamber-forming root section of the inner toothing is paired with a pressure valve which is connected to the outlet. The gerotor also comprises an inner gerotor element with an outer toothing which is guided in the outer gerotor element in a circumferential manner on an eccentric section of the shaft and is mounted in a rotatable manner so as to mesh with the inner toothing.

SCROLL COMPRESSOR

A scroll compressor includes fixed and orbiting scrolls, and satisfies at least one of a first condition and a second condition. In the first condition, a first gap between a distal end of the first wrap and the second base changes heading from an outer peripheral side of the first wrap to an inner peripheral side. In the second condition, a second gap between a distal end of the second wrap and the first base changes heading from an outer peripheral side of the second wrap to an inner peripheral side. A rate of change in the first gap in one area is greater than a rate of change in the first gap in another area. A rate of change in the second gap in one area is greater than a rate of change in the second gap in another area. 1. A scroll compressor comprising:a fixed scroll having a first base and a first wrap with a spiral shape formed on the first base; andan orbiting scroll that forms a compression chamber together with the fixed scroll, the orbiting scroll having a second base and a second wrap with a spiral shape formed on the second base, [ a first gap between a distal end of the first wrap and the second base changes heading from an outer peripheral side of the first wrap to an inner peripheral side and', 'a rate of change in the first gap from a center of the first wrap to an intermediate point of the first wrap is greater than a rate of change in the first gap from the intermediate point of the first wrap to an outer peripheral end of the first wrap and, 'a first condition in which'}, a second gap between a distal end of the second wrap and the first base changes heading from an outer peripheral side of the second wrap to an inner peripheral side and', 'a rate of change in the second gap from a center of the second wrap to an intermediate point of the second wrap is greater than a rate of change in the second gap from the intermediate point of the second wrap to an outer peripheral end of the second wrap., 'a second condition in which'}], 'the scroll ...

GEROTOR PUMP AND METHOD FOR PRODUCING SAME

Gerotor pump comprising an inner gerotor and an outer gerotor and an electric motor in a pump housing, and the outer gerotor is formed integrally with the rotor of the electric motor, wherein magnets are integrated into the outer gerotor, and the rotor is rotatably mounted on a shaft that is fixed on one side to a housing or a housing base of the pump housing. 1. A gerotor pump having an inner gerotor and an outer gerotor and an electric motor in a pump housing , wherein the outer gerotor is integrally formed with the rotor of the electric motor , wherein magnets are incorporated into the outer gerotor , and the rotor is rotatably mounted on a shaft that is fixed on one side to a housing or a housing base of the pump housing , wherein the rotor is mounted to the shaft end of the shaft by means of a bearing.2. The gerotor pump according to claim 1 , wherein the housing is a housing of a clutch or of a gear or of a driving machine.3. The gerotor pump according to claim 1 , wherein the housing is metallic.4. The gerotor pump according to claim 1 , wherein the housing base is a plastic component and has stiffeners.5. The gerotor pump according to claim 1 , wherein the pump housing comprises a bell-shaped housing lid which comprises at least one stator.6. The gerotor pump according to claim 5 , wherein the stator with windings is molded in a plastic material and forms the housing lid.7. The gerotor pump according to claim 5 , wherein the bell-shaped housing lid has an inner diameter corresponding to the outer diameter of the rotor and an air gap.8. The gerotor pump according to claim 1 , wherein the bell-shaped housing lid is mounted to the housing or the housing base in a tight-fitting manner by means of seals.9. The gerotor pump according to claim 1 , wherein the bell-shaped housing lid can be attached by means of a bayonet connection.10. A method for producing a gerotor pump according to claim 1 , comprising the steps of:attaching a shaft on one side to a housing or a ...

MOTOR-DRIVEN COMPRESSOR AND MANUFACTURING METHOD THEREOF

To provide a motor-driven compressor which suppresses heat generation, enables power saving, exerts excellent durability, lowers a manufacturing cost, and hardly produces a defective product. The motor-driven compressor according to the present invention comprises a cover. The cover includes a first connector portion, first and second wires, and first and second resin portions. The first and second wires include first and second terminal portions having a cylindrical shape, lead portions, and first and second lid portions that are supported at opening end portions of the first and second terminal portions. The first and second lid portions close the opening end portions of the first and second terminal portions, and thereby prevent an insulating resin from entering the first and second terminal portions. 1. A motor-driven compressor comprising a housing , an electric driving mechanism , a compression mechanism that is driven by the electric driving mechanism to compress a refrigerant , and a motor drive circuit that drives the electric driving mechanism ,the housing including a housing body that accommodates the electric driving mechanism and the compression mechanism, and a cover that is fixed to the housing body and forms an accommodation chamber for accommodating the motor drive circuit between the cover and the housing body,the cover including a connector portion which is configured to be connected with an external connector,the connector portion including a metal wire, and an insulating resin for fixing the wire to the cover, andthe wire including a terminal portion that is configured to be electrically connected to the external connector, and a lead portion that electrically connects the terminal portion to the motor drive circuit,wherein the insulating resin is formed over the terminal portion and the lead portion,the terminal portion has a cylindrical shape, anda lid portion that is arranged on the lead portion side to close an opening end portion of the ...

Electric Compressor

In order to ensure shrink-fitted components, such as a casing, to have a desirable force for holding a stator while maintaining a desirable durability, an electric compressor in which the stator is fixed to the casing by shrink fitting is configured as follows. Three protrusions 41 f are provided protruding radially inside from the peripheral wall of a first casing 41 so as to be spaced apart from each other in the circumferential direction, and each protrusion 41 f is provided with a groove 41 f 2 which extends in the axial direction in a circumferentially central portion of the protrusion 41 f . Protruding end surfaces 41 f 1 of the protrusions 41 f are fixed to the outer periphery of the stator 3 by shrink fitting at contact interfaces therebetween.

Pump insert

A pump insert without a dedicated housing includes a first pressure plate, a cam ring, a rotor, a second pressure plate, and radially displaceable vanes arranged in slots of the rotor and which run with a vane upper edge thereof engaging a contour of the cam ring during rotation of the rotor. The cam ring includes stagnation point protrusions which are configured as separate, moveable components fastened to the cam ring.

Refrigeration Compressor Fittings

A compressor () comprises: a housing assembly () having a plurality of ports including a suction port () and a discharge port (); a male rotor () mounted for rotation about an axis (); a female rotor () enmeshed with the male rotor and mounted in the housing for rotation about an axis () for drawing a flow from the e suction port, compressing the flow, and discharging the compressed flow through the discharge port. The housing assembly comprises: a motor case (); and a cover () bearing the suction port. The cover comprises a unitary piece forming: a mounting portion () mounted to an adjacent end () of the motor case, said adjacent end being large enough to pass the motor; and a fitting portion () extending to a rim () at the suction port and bearing an external groove (). 2. The compressor of wherein:a ratio of an outer diameter D at the fitting portion to a length L of the cover is 0.9:1 to 1.7:1.3. The compressor of wherein:a ratio of an outer diameter at the fitting portion to a maximum transverse dimension of the cover is 1:3 to 1:6.4. The compressor of wherein:the cover comprises a casting.5. The compressor of wherein:the cover consists essentially of grey cast iron.6. The compressor of wherein:the cover is secured to the motor case via an array of at least 8 fasteners.7300301. A vapor compression system (; ) comprising the compressor of claim 1 , and further comprising:{'b': '302', 'a heat rejection heat exchanger ();'}{'b': '304', 'a heat absorption heat exchanger (); and'}a flowpath from the discharge port sequentially through the heat rejection heat exchanger and heat absorption heat exchanger and returning to the suction port.8. The vapor compression system of being a chiller.9. The vapor compression system of further comprising:{'b': 350', '366', '368', '336', '332', '332', '1', '332', '2, 'a clamp () having one flange () accommodated in the groove and another flange () accommodated in a groove () of a suction line (; -, -).'}10. The vapor compression ...

Scroll compressor

A scroll compressor includes a casing having a cylindrical barrel and lid, a compression mechanism having fixed and movable scrolls, and a suction passage that sends a fluid into a compression chamber. The fixed scroll includes a fixed-side end plate, a fixed-side wrap standing upright on the fixed-side end plate, and a suction hole. The suction hole is capable of communicating with the compression chamber. The suction passage includes an insertion pipe portion inserted into a through hole of the lid, and an in-plate passage formed in the fixed-side end plate and having an outflow opening opened toward the suction hole. A center of the through hole is closer to an axis of the barrel than a center of the outflow opening of the in-plate passage. An entirety of the suction passage is positioned radially outward of a portion, of the through hole, closest to the axis of the barrel.

Pump isolation apparatus and method for use in tubing string pressure testing

An apparatus and method for pressure testing a tubing string of a fluid production well, the tubing string being provided with a progressing cavity pump at a downhole end, which apparatus and method can be used to help determine whether the tubing string has failed or the pump has failed. The apparatus comprises a plug member connected to the rod string assembly that includes the pump rotor, such that the rod string assembly can be lowered to seat the plug member in a seat member within the tubing string above the pump, thus sealing off and isolating the pump from the rest of the tubing string, allowing pressure testing of the tubing string above the pump.

REMOVABLE HYDROPAD

A scroll compressor is provided and includes a motor housing having a support surface, a fixed scroll fixedly disposable on the motor housing, an orbiting scroll which is operably disposable for fluid-compressive orbital movement relative to the fixed scroll and a removable hydropad removably disposable on the support surface between the orbiting scroll and the support surface. 1. A scroll compressor , comprising:a motor housing having a support surface;a fixed scroll fixedly disposable on the motor housing;an orbiting scroll which is operably disposable for fluid-compressive orbital movement relative to the fixed scroll; anda removable hydropad removably disposable on the support surface between the orbiting scroll and the support surface.2. The scroll compressor according to claim 1 , wherein the fixed and orbiting scrolls have complementary volute claim 1 , involute claim 1 , spiral or hybrid curve vane geometries.3. The scroll compressor according to claim 1 , wherein the orbiting scroll comprises:a base;an orbiting scroll vane that extends from the base in a first direction;a shaft that extends from the base in a second direction opposite the first direction; andhydropad seals that protrude from the base in the second direction.4. The scroll compressor according to claim 1 , further comprising a drive ring disposable about the support surface and the removable hydropad.5. The scroll compressor according to claim 1 , wherein the removable hydropad is one or more of pressable into claim 1 , screwable into or pinnable to the motor housing.6. The scroll compressor according to claim 1 , wherein a material of the removable hydropad differs from a material of the motor housing.7. The scroll compressor according to claim 6 , wherein the material of the removable hydropad is heavier than the material of the motor housing.8. The scroll compressor according to claim 6 , wherein the material of the removable hydropad comprises cast iron or aluminum alloy and the material ...

Compressor apparatus and manufacturing method of the same

Provided is a compressor apparatus comprising: a casing defining appearance of the apparatus; and a drive portion coupled to an inner circumferential surface of the casing and configured to rotate a rotatable shaft; a compression portion coupled to the rotatable shaft and configured to compress fluid, wherein the compression portion apparatus is characterized in that the drive portion and the compression portion are fixed to the fastening member which is detachably attached to at least one of the side face of the drive portion or the side face of the compression portion and thus, the combination of the drive portion and the compression portion is coupled to an inner circumferential surface of the casing. Further, provided is a manufacturing method of the compression portion apparatus.

SCROLL COMPRESSOR

A scroll compressor includes a base seat portion which is integrally formed with one end surface of a shaft and in which a press-fitting hole exposing a first hole portion is formed. The base seat portion is disposed in a second portion of a penetration portion with a gap interposed between a drive bush body and the base seat portion. 1. A scroll compressor comprising:a fixed scroll which includes a first end plate portion and a first swirl portion formed upright in the first end plate portion;an orbiting scroll which includes a second end plate portion having one surface facing the first end plate portion, a second swirl portion formed upright in the one surface of the second end plate portion and joining with the first swirl portion to form a compression chamber, and a boss portion formed on the other surface of the second end plate portion located opposite to the one surface and protruding from the other surface;a shaft which includes a first hole portion formed on close to one end surface facing the other surface of the second end plate portion, extends in the direction of the first axis, and rotates about the first axis;a drive bush which includes a drive bush body formed between the second end plate portion and the one end surface of the shaft while being accommodated in the boss portion and a penetration portion penetrating the drive bush body in a direction from the second end plate portion toward the one end surface of the shaft;an eccentric shaft which is disposed in the first hole portion, a press-fitting hole through which the first hole portion is exposed, and the penetration portion and which extends in a direction of a second axis parallel to the first axis; anda base seat portion which is integrally formed with the one end surface of the shaft and is provided with the press-fitting hole,wherein the penetration portion includes a first portion which is disposed close to the orbiting scroll and a second portion which is disposed close to the shaft, ...

SEGMENTED ROTOR FORM FOR SUPERCHARGERS AND EXPANDERS

A segmented rotor assembly built from individual rotor segments is presented. In one aspect, the segmented rotor assembly is defined by a plurality of lobes extending between a first lobe end and a second lobe end. Each lobe is constructed from a pair of identically shaped lobe segments mated to each other. Each lobe segment is provided with a helical twist extending between a first segment end and a second segment end. The constructed lobes can then be mated to each other to create a wholly formed rotor. 1. A segmented rotor assembly:a) a plurality of lobes extending between a first lobe end and a second lobe end, each lobe being defined by a pair of identically shaped lobe segments mated to each other, wherein each lobe segment is provided with a helical twist extending between a first segment end and a second segment end.2. The segmented rotor assembly of claim 1 , wherein the plurality of lobes includes three lobes.3. The segmented rotor assembly of claim 1 , wherein the plurality of lobes includes four lobes.4. The segmented rotor assembly of claim 1 , wherein the plurality of lobes are hollow.5. The segmented rotor assembly of claim 1 , wherein each lobe segment includes a sidewall extending between the first and second segment ends and an end wall extending from the sidewall at the first segment end claim 1 , wherein when the rotor segments are mated claim 1 , each of the plurality of lobes has closed ends.6. The segmented rotor assembly of claim 5 , wherein each end wall has at least one aperture for receiving at least one pin extending from the sidewall second end.7. The segmented rotor assembly of claim 5 , further comprising a hub portion extending from the end wall of each rotor segment claim 5 , wherein when the plurality of lobes are mated to each other to form the segmented rotor assembly claim 5 , the hub portions of each lobe form a hub defining a central aperture.8. The segmented rotor assembly of claim 6 , further comprising a shaft extending ...

COMPRESSOR AND METHOD FOR PRODUCING COMPRESSOR

A compressor includes compression and drive mechanisms disposed in a casing having a cylindrical member. The compression mechanism includes a cylinder main body, an end surface member attached to the cylinder main body, a muffler main body attached to the end surface member, an intake hole communicating with the compression chamber and extending in a direction crossing the drive shaft, and a circular hole located radially outside the compression chamber and extending in a direction parallel to the drive shaft. The circular hole opens to a space inside the casing. At least a part of the circular hole is located within an area defined by extending the intake hole in a plan view. A method of producing a compressor includes inserting a positioning pin into the circular hole of the compression mechanism and pressing an inlet tube into the intake hole from outside of the cylindrical member. 15.-. (canceled)6. A compressor comprising:a compression mechanism; anda drive mechanism,the compression mechanism and the drive mechanism being disposed in a casing including a cylindrical member, a stator fixed to an inner circumferential surface of the cylindrical member, and', 'a rotor disposed inside the stator, the rotor being configured to rotate with a drive shaft,, 'the drive mechanism including'} a cylinder main body having a compression chamber in which a roller driven by the drive shaft is disposed,', 'an end surface member attached to an end surface of the cylinder main body,', 'a muffler main body attached to the end surface member,', 'an intake hole communicating with the compression chamber and extending in a direction crossing the drive shaft, and', 'a circular hole located radially outside the compression chamber and extending in a direction parallel to the drive shaft,', 'the circular hole opening, outside the muffler main body, to a space inside the casing, and', 'at least a part of the circular hole being located within an area defined by extending the intake hole ...

ECCENTRIC SCREW PUMP

The invention relates to an eccentric screw pump comprising at least—a stator (), a rotor () rotating about the stator, a drive () for the rotor (), a pump housing () connected to the stator () and comprising at least one housing opening () for the medium to be conveyed, a connecting shaft () connected to the drive (), a coupling rod () arranged in the pump housing () and connected on the drive side to the connecting shaft () via at least one detachable drive-sided connecting range and is connected to the rotor side of the rotor () via at least one detachable rotor-sided connecting range, the pump housing () comprises a drive-sided housing connection () and a stator-sided housing connection (). The pump is characterised that rotor-sided housing connection () comprises a fixed first connection section () and a displaceable second connection section () which can be displaced axially on the first connection section () in the direction of the housing opening () of the pump housing () for exposing the rotor-sided connection range. 1. An eccentric screw pump comprising:a stator defining an axis;a rotor extending along the axis and rotating in the stator;a drive for rotating the rotor,a pump housing having a rotor end connected to the stator, a drive end connected to the drive, and a housing opening between the ends for receiving the medium being pumped;a connecting shaft connected to the drive,a coupling rod in the pump housing;a releasable drive-end coupling at the drive end and connecting the connecting shaft to the coupling rod;a releasable rotor-end coupling at the rotor end and connecting the coupling rod to the rotor;a drive-end housing collar securing the pump housing to the drive; anda rotor end housing collar having a fixed first element fixed relative to the pump housing and an axially displaceable second element that is releasably fixable to the stator and that can be pushed axially toward the housing opening of the pump housing onto the first element to expose ...

Eccentric screw pump

The invention relates to an eccentric screw pump comprising at least one stator ( 1 ) made from an elastic material and a rotor ( 2 ) that is rotatable in the stator ( 1 ), wherein at least some regions of the stator ( 1 ) are surrounded by a stator casing ( 3 ), and the stator casing ( 3 ), as a casing split along its length, consists of at least two casing segments ( 19 ) and forms a stator clamping device by means of which the stator can be clamped against the rotor ( 2 ) in the radial direction, wherein the stator clamping device has one or more movable adjusting elements which work on the casing segments ( 19 ) to adjust and clamp the stator. Said pump is characterised in that the stator clamping device comprises one or more actuators which are connected to the adjusting elements or are equipped with adjusting elements for an automated advancement of the stator.

COMPRESSOR OIL SEPARATION AND ASSEMBLY METHOD

A compressor may include a shell, a compression mechanism, a bearing housing, a shroud, a stator, and a rotor. The compression mechanism includes a scroll member that is attached to the shell. The shroud is rotatably fixed relative to the shell and attached to the bearing housing. The stator is fixed relative to the shell. The shroud may have an annular body including an inner surface defining a center shroud passage. The stator may have an outer surface defining a stator passage. An outer surface of the rotor and an inner surface of the stator may be spaced apart and define a discharge gap in fluid communication with the center shroud passage and the stator passage. A continuous passage may extend between a top surface of the scroll member and a bottom surface of the shroud and may be in fluid communication with the shroud passage.

DISMOUNTING DEVICE FOR PROGRESSIVE CAVITY PUMPS

A pump includes a housing having a first end and a second end and extending along a longitudinal axis and a discharge casing having a first end coupleable to the second end of the housing. The discharge casing extends along the longitudinal axis coaxial to the housing. A dismounting device includes a first dismount casing and a second dismount casing disposed between the discharge casing and the second end of the housing. The dismounting device extends along the longitudinal axis coaxial to the housing and the discharge casing. 114-. (canceled)15. A pump , comprising:a housing having a first end and a second end and a longitudinal axis;a discharge casing having a first end coupleable to the second end of the housing, the discharge casing extending along the longitudinal axis coaxial to the housing; anda dismounting device including a first dismount casing and a second dismount casing disposed between the discharge casing and the second end of the housing, the dismounting device configured to extend along the longitudinal axis coaxial with the housing and the discharge casing, the first dismount casing having a variable first thickness and the second dismount casing having a variable second thickness such that the first dismount casing is configured to mate with the second dismount casing so that the dismounting device has a cylindrical shape.16. The pump according to claim 15 , wherein the first dismount casing the second dismount casing are removably coupleable to the second end of the housing and the discharge casing such that an internal portion of the housing is accessible.17. The pump according to claim 15 , wherein the first end of the housing is coupleable to a suction casing by a tie rod extending to the second end of the housing claim 15 , the tie rod being connectable to a flange disposed at the second end of the housing.18. The pump according to claim 17 , wherein the flange is further coupleable to the discharge casing such that the first dismount casing ...

Device to Determine Volume of Fluid Dispensed

An apparatus for determining the volume of fluid dispensed. The apparatus has an acoustic volume sensor that acoustically excites a reference volume and a measurement chamber with a loudspeaker and measures the acoustic response with microphones acoustically coupled to the reference and the measurement chamber. The loudspeaker and sensing microphones are connected to the measurement chamber by separate ports. A detachable dispensing chamber is coupled to the acoustic volume sensor. The volume of the fluid dispensed is determined by a processor based on the acoustic response of the microphones to acoustic excitement by the loudspeaker.

Bush bearing and a scroll compressor including a bush bearing

A bush bearing and a scroll compressor including a bush bearing are provided. A boss of an orbiting scroll may be inserted into and coupled to a boss coupling groove of a rotational shaft, and thus, an outer circumferential surface of a bush bearing may wholly contact an inner circumferential surface of the boss coupling groove, thereby decreasing wear of the bush bearing. Further, friction loss in the bush bearing may be reduced, and thus, compression efficiency and reliability may be enhanced, noise may be reduced, and material costs may be reduced. Furthermore, despite that the bush bearing is formed in a ring shape and press-fitted to the boss, as the bush bearing may be formed of a plastic material having an ether ketone bonding in consideration of a thermal expansion rate, an elongation, and a press-fit range, the bush bearing may be effectively prevented from being detached from the boss, thereby enhancing a reliability of a compressor.

Water Pump For Marine Engine Having Tool For Replacing Impeller

A water pump for a marine engine includes a cap covering an internal cavity of the pump's housing when the pump is operating. The cap functions as a tool to remove a damaged or worn impeller from inside the internal cavity. A threaded hub of the cap engages internal threads of the impeller to assist a user in removing the impeller for replacement. A cap lock ring threaded onto the pump housing retains the cap over the internal cavity. A rotatable drive shaft has splines which mate with a splined portion of the impeller to rotate the impeller. The cap lock ring is disengaged from the housing and the cap removed to enable a person to use the threaded hub of the cap to remove the impeller.

Internal Gear Pump

An internal gear pump for a hydraulic vehicle brake system comprises a pump shaft, a pinion positioned on the pump shaft, an annulus configured to mesh with the pinion, a shaft bearing positioned on one side of the pinion, and an axial disk. The pinion is configured to conjointly rotate with the pump shaft. The pump shaft is rotatable mounted in the shaft bearing. The axial disk is positioned between the shaft bearing on one end side, and the pinion and the annulus on an opposite end side, and bears sealingly against the pinion and the annulus. The shaft bearing is configured to center the axial disk.

PUMP PARTICULARLY FOR PUMPING ABRASIVE AND/OR CHEMICALLY AGGRESSIVE LIQUIDS

A pump particularly for pumping abrasive and/or chemically aggressive liquids 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 is rotatably supported by at least one support associated with the pump body. 1. A pump for pumping abrasive and/or chemically aggressive liquids , the pump 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 and said at least one support are both at least partially made of a material having a hardness greater than or equal to 5 Mohs , said material being located at least in the areas of said shaft and said at least one support in mutual contact.2. The pump according to claim 1 , wherein said shaft and said at least one support are completely made of said material having a hardness greater than or equal to 5 Mohs.3. The pump according to claim 2 , wherein said shaft and said at least one support are each made in a single piece of a single material having a hardness greater than or equal to 5 Mohs.4. The pump claim 1 , according to claim 1 , further comprising a pair of rotating pumping members claim 1 , each rotating pumping member comprising a shaft and a gear wheel associated with the respective shaft claim 1 , each shaft being rotatably supported by at least one support associated with said pump body claim 1 , said gear wheels of said pair of rotating pumping members being mutually meshed claim 1 , both said shafts claim 1 , both said gear wheels and each of said supports being at least partially made of said material having a hardness greater than or equal to 5 Mohs claim 1 , said material being located at least in the areas of said shafts and of said supports in mutual contact ...

VACUUM PUMP SEALING ELEMENT

A rotary pump, preferably a vacuum. pump, featuring: a delivery space including an inlet on a low-pressure side and an outlet on a high-pressure side of the pump; a rotor which is arranged in the delivery space and delivers a fluid from the inlet into the delivery space to the outlet from the delivery space; at least one housing part which delineates the delivery space at least axially; and a drive shaft which is connected in drive terms to the rotor; including at least one sealing element which is connected, secured against shifting and/or rotating, to the drive shaft and/or rotor and forms a radial sealing gap with the housing part. 1. A rotary pump , comprising:a delivery space comprising an inlet on a low-pressure side and an outlet on a high-pressure side of the pump;a rotor which is arranged in the delivery space and delivers a fluid from the inlet into the delivery space to the outlet from the delivery space;at least one housing part which delineates the delivery space at least axially; anda drive shaft which is connected in drive terms to the rotor,wherein at least one sealing element which is connected, secured against shifting and/or rotating, to the drive shaft and/or rotor and forms a radial sealing gap with the housing part.2. The rotary pump according to claim 1 , wherein the sealing element is integrally formed by the drive shaft and/or rotor.3. The rotary pump according to claim 1 , wherein the sealing element and the housing part form an axial gap together.4. The rotary pump according to claim 1 , wherein the drive shaft is mounted in at least one bearing region in the housing part and forms a radial bearing gap with the housing part in the bearing region claim 1 , wherein the radial bearing gap is smaller in the radial direction than the radial sealing gap.5. The rotary pump according to claim 1 , wherein the drive shaft is mounted in at least one bearing region in the housing part claim 1 , wherein the bearing region exhibits an axial extent which ...

PENDULUM OIL PUMP

A pendulum pump includes a housing, a cover positioned on the housing and forming a cavity therebetween, an inner rotor and an outer rotor positioned within the cavity, wherein the inner rotor is connected via a plurality of pendulums to the outer rotor, and the pendulums are mounted to the outer rotor in an articulated manner such that a rotational eccentricity can be imparted between the inner rotor and the outer rotor to control a flow rate of the pendulum pump, and a protective plate positioned within the cavity and against a surface of one of the housing and the cover. 1. A pendulum pump , comprising:a housing;a cover positioned on the housing and forming a cavity therebetween;an inner rotor and an outer rotor positioned within the cavity, wherein the inner rotor is connected via a plurality of pendulums to the outer rotor, and the pendulums are mounted to the outer rotor in an articulated manner such that a rotational eccentricity can be imparted between the inner rotor and the outer rotor to control a flow rate of the pendulum pump; anda protective plate positioned within the cavity and against a surface of one of the housing and the cover.2. The pendulum pump according to claim 1 , wherein the at least one surface is an inner surface of the housing.3. The pendulum pump according to claim 1 , wherein the at least one surface is an inner surface of the cover.4. The pendulum pump according to claim 1 , further comprising another protective plate positioned within the cavity and against a surface of the other of the housing and the cover.5. The pendulum pump according to claim 1 , wherein the protective plate is steel.6. The pendulum pump according to claim 1 , wherein at least one of the housing and the cover are aluminum.7. The pendulum pump according to claim 1 , wherein the surface is a single planar surface and the protective plate is positioned against the single planar surface.8. The pendulum pump according to claim 1 , wherein the protective plate ...

GASEOUS FLUID COMPRESSION DEVICE

An apparatus for compressing gas-phase fluid including a housing having a wall, a stator having a base plate and a helical wall extending from one side of the base plate, and an orbiter having a base plate and a helical wall extending therefrom. The base plates are disposed such that the wall of the stator and the wall of the orbiter engage with each other to define closed working chambers. The volumes and positions of the working chambers are changed in response to the motion of the orbiter. The apparatus includes a guide device having an opening formed in the base plate of the orbiter and a pin coupled to the housing. The pin engages the opening. A sliding element is disposed between the wall of the housing and the orbiter and coupled to the wall. The pin is pressed into an opening formed in the sliding element. 113-. (canceled)14. An apparatus for compressing gas-phase fluid comprising:a housing having a wall;a non-motional stator having a base plate and a helical wall extending from one side of the base plate;a motional orbiter having a base plate and a helical wall extending from the base plate, the base plate of the stator and the base plate of the orbiter disposed wherein the wall of the stator and the wall of the orbiter engage each other to define closed working chambers, volumes and positions of the working chambers being changed in response to motion of the orbiter;a guide device having an opening formed in the base plate of the orbiter and a pin fixedly coupled to and protruding from the housing, the pin engaging into the opening; anda sliding element disposed between the wall of the housing and the orbiter and fixedly coupled to the wall of the housing, wherein the pin is pressed into an opening formed in the sliding element.15. The apparatus according to claim 14 , wherein the sliding element has a circular ring disk shape that has an inner diameter claim 14 , an outer diameter claim 14 , a thickness claim 14 , an outer jacket surface claim 14 , and ...

Pump

A pump including a rotor; a first housing part and a second housing part, between which the rotor is arranged such that it can be rotated about a rotational axis relative to the first and second housing part; at least one positioning element which positions the second housing part with respect to its angular position about the rotational axis relative to the first housing part; and a spring, wherein the second housing part is arranged between the spring and the rotor, wherein the spring is fastened to the at least one positioning element or the second housing part.

COMPACT LOW NOISE ROTARY COMPRESSOR

The present disclosure relates to a low noise, compact rotary compressor configured to damp noise and vibration generated from internal components. The compressor may include a stator holder coupled to the stator and the pump, providing physical separation between the stator and the casing. The compressor may also include a pump holder coupled to the pump and the casing, providing physical separation between the pump and the casing. Additional damping components may be placed at various coupling points within and around the stator holder and/or pump holder. The suction line connection may also be configured to reduce noise and vibration. Aspects of the present disclosure may be applicable for reducing the noise and vibration in a number of fluid displacement devices and BLDC motors. 1. A rotary compressor , comprising:a motor having a stator and a rotor electromagnetically coupled to one another;a pump physically coupled to the rotor of the motor, the pump configured to draw in fluid through a suction line to an internal space within the pump and to compress and discharge the fluid through a discharge line;a casing surrounding the motor and the pump;a stator holder coupled to the stator of the motor and the pump, the stator holder providing physical separation between the stator and the casing, and the stator holder constructed and arranged to reduce acoustic and vibrational energy transfer between the stator and the pump; anda pump holder coupled to the pump and the casing, the pump holder providing physical separation between the pump and the casing, and the pump holder constructed and arranged to reduce acoustic and vibrational energy transfer between the pump and the casing.2. (canceled)3. The compressor of claim 1 , wherein the stator holder or the pump holder is constructed and arranged to increase impedance within the respective holder to transmission of stress waves associated with acoustic or vibrational energy due claim 1 , at least in part claim 1 , to ...

Method of making a two-piece counterweight for a scroll compressor

A method of manufacturing a two-piece counterweight for a scroll compressor is provided. The method includes molding an outer plate, and molding a base having a first opening configured to receive a scroll compressor drive shaft having a longitudinal axis. The method further includes configuring the base for assembly and attachment to the drive shaft. The method also includes attaching the outer plate to the base such that the outer plate is axially offset from the base. In a particular embodiment of this method, the base and outer plate are molded from powdered metal. In certain embodiments, the base and outer plate include one or more openings aligned to permit attachment by inserting a mechanical fastener through the aligned openings. In alternate embodiments, the base and outer plate are attached via brazing or welding.

Rotary Piston Pump, Method For Fixing Rotary Pistons Of A Rotary Piston Pump And Method For Dismantling Rotary Pistons Of A Rotary Piston Pump

A method for fixing rotary pistons in a rotary piston pump and a method for dismantling rotary pistons of a rotary piston pump, where the rotary piston pump has two counter-rotating rotary arranged in a pump space on drive shafts. The rotary pistons each include a seating for the drive shafts. The respective drive shaft is arranged and fixed with an end region in the seating of the respective rotary piston. A diameter of the drive shafts in the end region can be widened elastically. In an operational state, in which the rotary pistons are arranged on the respective drive shafts, a frictional connection is formed between the respective seating of the rotary piston and the end region of the respective drive shaft.