МНОГОСТУПЕНЧАТЫЙ МОДУЛЬНЫЙ ВАКУУМНЫЙ НАСОС

Изобретение относится к многоступенчатым модульным вакуумным насосам, в частности к узлам уплотнения, используемым в таких вакуумных насосах. Вакуумный насос 10 содержит два корпусных элемента, выполненных с возможностью герметичного соединения друг с другом с образованием группы камер. Группа камер проходит в продольном направлении от впускной области насоса 10 к выпускной области насоса 10. Средство уплотнения 30 расположено внутри вакуумного насоса 10 между двумя корпусными элементами для предотвращения перемещения текучей среды в вакуумный насос 10 и из него в месте соединения указанных элементов. Предусмотрена группа отдельных, удлиненных каналов 32, 34, 36, 38, расположенная между средством уплотнения 30 и группой камер. Каналы предназначены для защиты средства уплотнения 30 от текучей среды, которая проходит через камеры во время работы вакуумного насоса 10. Каждый канал выполнен с возможностью принятия барьерной текучей среды, имеющей давление, отличное от давления барьерной текучей ...

КОРПУС МНОГОСТУПЕНЧАТОГО НАСОСА И МНОГОСТУПЕНЧАТЫЙ НАСОС ДЛЯ ГАЗА

Группа изобретений относится к корпусу многоступенчатого насоса, а также к многоступенчатому насосу, который, в частности, может представлять собой вакуумный насос. Корпус многоступенчатого насоса содержит, по меньшей мере, первую рабочую камеру (20), вторую рабочую камеру (21), соединительный канал (26а), обеспечивающий сообщение выхода (27) камеры (20) с входом камеры (21), и герметичный проход (40) для циркуляции охлаждающей жидкости. Канал (26а) представляет собой боковой канал корпуса многоступенчатого насоса, который имеет по меньшей мере одну теплопроводную стенку (33), частично ограничивающую канал (26а) и имеющую наружную поверхность (34). По меньшей мере часть канала (26а) проходит между поверхностью (34) стенки (33) и проходом (40). Группа изобретений направлена на повышение эффективности отведения тепла, выделяемого при сжатии газа в корпусе многоступенчатого насоса во время его работы. 2 н. и 11 з.п. ф-лы, 11 ил.

РОТОРНО-ЩЕЛЕВОЙ НАСОС

... 1. Роторно-щелевой насос, имеющий:несколько образующих соответственно одну насосную ступень (50, 52, 54, 56, 58) многокулачковых пар роторов (10; 48,49), исоответственно соединяющие друг с другом соседние насосные ступени (52, 54, 56, 58, 60) соединительные каналы (30, 34, 77, 84, 86, 88, 90),отличающийся тем, чтосоединительные каналы (30, 34, 77, 84, 86, 88, 90) расположены в отделяющих друг от друга соседние насосные ступени (50, 52, 54, 56, 58, 60) перегородках (74, 76, 78, 80, 82).2. Роторно-щелевой насос по п. 1, отличающийся тем, что впускное отверстие канала и/или выпускное отверстие канала по меньшей мере одного соединительного канала (30, 34, 77, 84, 86, 88, 90) при работе перекрывается боковой стороной ротора (10, 48, 49).3. Роторно-щелевой насос по п. 1 или 2, отличающийся тем, что все соединительные каналы (30, 34, 77, 84, 86, 88, 90) расположены в отделяющих друг от друга насосные ступени (50, 52, 54, 56, 58, 60) перегородках (74, 76, 78, 80, 82).4. Роторно-щелевой насос по ...

ДВУХСТУПЕНЧАТЫЙ РОТАЦИОННЫЙ КОМПРЕССОР

... 1. Двухступенчатый ротационный компрессор (100), содержащий:герметичную емкость (1);компрессионный механизм (3), расположенный в герметичной емкости (1);электродвигатель (2), расположенный в герметичной емкости (1) и являющийся источником движущей силы компрессионного механизма (3); иприводной вал (5), передающий движущую силу электродвигателя (2) компрессионному механизму (3),причем компрессионный механизм (3) включает в себяраму (14) ступени низкого давления,цилиндр (11) ступени низкого давления, в котором выполнено первое сквозное отверстие, представляющее собой компрессионную камеру (15) ступени низкого давления, и при этом один проем первого сквозного отверстия перекрыт рамой (14) ступени низкого давления,промежуточную перегородку (50), которая перекрывает другой проем первого сквозного отверстия,цилиндр (31) ступени высокого давления, в котором выполнено второе сквозное отверстие, представляющее собой компрессионную камеру (35) ступени высокого давления, и при этом один проем второго ...

MEHRSTUFIGER ROTATIONSVERDICHTER

MEHRFACHSCHALTUNG VON ROTATIONSVAKUUMPUMPEN.

A number of rotary vacuum pumps is mounted in a common housing (5) and driven from a single motor (22). The pumps (1) are arranged in two parallel rows with, e.g. six pumps (1) in one row and four pumps in the other one. Each pump has its shaft fitted with a gear wheel which meshes with the gear wheels of two pumps in the opposite row or with the gear wheel of the drive shaft (7). The latter is mounted between two pumps in the row with four pumps and is driven by a chain (24) from the motor.

HYDRAULIKDRUCKZUFÜHRSYSTEM EINES AUTOMATIKGETRIEBES

Ein Hydraulikdruckzuführsystem eines Automatikgetriebes kann niedrigen Hydraulikdruck und hohen Hydraulikdruck mittels Öl erzeugen, das in einer Ölwanne gespeichert ist, und kann den niedrigen Hydraulikdruck und den hohen Hydraulikdruck einem Niederdruckabschnitt bzw. einem Hochdruckabschnitt zuführen. Bei dem Hydraulikdruckzuführsystem eine Niederdruck-Hydraulikpumpe, die das in der Ölwanne gespeicherte Öl pumpt und den niedrigen Hydraulikdruck erzeugt, und eine Hochdruck-Hydraulikpumpe, die den von der Niederdruck-Hydraulikpumpe zugeführten niedrigen Hydraulikdruck in den hohen Hydraulikdruck ändert und den hohen Hydraulikdruck dem Hochdruckabschnitt zuführt, als eine Hydraulikpumpe integriert sein.

ZWEIWELLENVAKUUMPUMPE MIT SCHOEPFRAUM.

The pump (1) has at least one suction space containing a respective rotor pair (8,9) defined between two end plates and a side space containing a synchronising drive (23,24) with two cog wheels. One end of one shaft (2,3) is coupled to the drive motor, (22) with both shafts (2,3) of the vacuum pump (1) arranged vertically. The side space for the synchronisation drive (23,24) and the coupling between the shaft and the drive motor (22) are positioned below the lower must rotor pair (8,9). Pref. the pump inlet (29) lies above the uppermost pump stage and the outlet (36) is below the lowermost pump stage.

Compressor system for producing oil-free compressed air, has expansion machine transforming energy in form of heat into mechanical work for driving fan and electrical machine to realize heat dissipation of system

The system (1) has a closed secondary circuit (31) with secondary-circuit-coolers (18, 19), where heat dissipated by a heat carrier such as compressed air, is delivered from a heat-delivering part (17) to the coolers. An expansion machine (21) of the secondary circuit transforms energy in form of the heat into mechanical work for driving a fan (24) and an electrical machine (24) to realize heat dissipation of the system. The fan (23) generates air flow flowing through a heat-cooler (26) of the secondary circuit.

Verdrängungsvakuumpumpe

Screw-type vacuum pump has at least two adjacent chambers directly interconnected by check valve with throughflow direction towards pressure side and formed by continuous valve passage

The screw-type vacuum pump has two meshing screw rotors(12,14) defining chambers(20-22) with respective volumes which become smaller in the direction of feed. At least two adjacent chambers are directly interconnected by a check valve(41a,41b) with throughflow direction towards the pressure side. The check valve is formed by a continuous valve passage, and the check valve in longitudinal section is constructed asymmetrically in such a way that it has different throughflow characteristics in both flow directions.

SCHRAUBENVAKUUMPUMPE MIT ROTOREN

Controllable vane compressor e.g. single-vane compressor, for compressing fluid in cooling system in electric car, has rotor within housing wall connected with shaft, where fluid in pressure area is displaced into pressure output via groove

The compressor has a rotor (115) within an elliptical housing wall (123) with a center point and displacement connected with a drive shaft (111) to rotate at a stationary central rotational axis (114). Fluid is transported from a suction region via an upper dead center with smaller chambers into a pressure area. The fluid is sucked into the suction region through a suction hole and a suction groove (141). The fluid in the pressure area is outwardly displaced into a pressure output (140) via a pressure groove (139) in a pressure-increasing manner.

Mehrstufige Wälzkolbenpumpe

Mehrstufige Wälzkolbenpumpe, mitzwei in einem Gehäuse (10) angeordneten, mehrere Drehkolben (20) tragenden Wellen,wobei korrespondierende Drehkolben (20) ein Drehkolbenpaar ausbilden und mehrere jeweils eine Pumpenstufe (12, 14, 16, 18) ausbildende Drehkolbenpaare vorgesehen sind,mehreren jeweils benachbarte Pumpstufen miteinander verbindenden Verbindungskanälen (38),einem mit der ersten Pumpstufe verbundenen Pumpeneinlass (34) undeinem mit der letzten Pumpstufe verbundenen Pumpenauslass (36),dadurch gekennzeichnet, dassdas eingebaute Volumenverhältnis (VR) mindestens 15, vorzugsweise mindestens 20 und besonders bevorzugt mindestens 25 beträgt.

Single-shaft vacuum displacement pump has two pump stages each with pump rotor and drive motor supported by the shaft enclosed by a stator housing

The single shaft pump has two pump stages (12,14) and a drive motor (16) mounted axially between same. The shaft (22) supports two pump rotors (13,15) and the motor rotor (17). Two rolling bearings (32, 34) can be provided between the motor rotor and pump rotors. The shaft is surrounded by a stator housing which has no shaft seal. The motor rotor acts as a lubricant pump to pump lubricant from the high vacuum pump stage to the pre-vacuum pump stage on the output side.

Kontrollsystem für zweistufige Vakuumpumpe

Vacuum pumping

Rotor assembly

Improvements in rotary blowers or compressors

... 770,113. Rotary compressors. VENEDIGER H. J. March 2, 1955 [March 15, 1954], No 6102/55. Class 110 (2). A pump of the outwardly-sliding radial or substantially radial vane type comprises two pumping units which are arranged in a common casing about parallel axes and are drivingly interconnected for rotation in opposite directions relative to one another by means of a gear on the driven shaft of one unit engaging a gear on the driving-shaft of the other. The rotors 6, 61 are made of aluminium-silicon alloy and are journalled in cast-iron or steel liners 5, 51 which are cast or shrunk in the stator 1, each rotor consisting of four segments screwed to a flanged shaft 11, 12. The shafts are interconnected by gear-wheels 13, 14 and the shaft 111 or 12 drives a lubricating pump 15. Each rotor contains two one-piece, H-shaped nickelsteel vanes 16, 17. The liners 5, 51 have circular or oval air inlet and outlet passages 19, 20 respectively, see Fig. 1 (not shown), the stator being provided ...

Multi-stage vacuum pump assembly having pumps connected both in parallel and series.

A multistage pumping assembly comprises some pumps, 14, 15 and 16, connected in series, with at least the first pumping stage comprising two or more pumps 13a, 13b connected in parallel. A further embodiment having additional parallel pumps is shown in Figure 2. These arrangements obviate the need to drive the early stage pump units at very high rotation rates, thus saving on wear and energy consumption.

Improvements in or relating to rotary blowers or compressors

... 504,385. Rotary blowers. FLETCHER & WINTERBOTTOM, Ltd., and ALLEN, H. Sept. 29, 1937, No. 26313. [Class 110 (ii)] A blower or compressor comprises a central rotor 1 with four vanes 4, and two outer rotors 2, each having two vanes 5. The two outlets 21, 22, may lead to a common delivery such as an induction manifold of an internalcombustion engine, and the inlets 19, 20, be connected to separate carburetters. A multistage compressor may be formed of two sets of rotors on the same shafts 10, 11, 12, separated by a partition, the two sets being of different axial lengths. The vanes are hollowed out to reduce weight. Vernier adjusting means 17 enable the relative angular positions of the smaller rotors to be corrected with respect to the centre rotor. Labyrinth packings 18 are provided.

Rotary positive displacement multi-stage compressor.

A multi-stage rotary type compressor is constituted in such a manner that an electric motor and a plurality of compression elements to be driven by the electric motor are disposed in a closed container and the compression elements thus-disposed are sequentially connected in series. The compressor thus-constituted is arranged in such a manner that the space in the closed container is filled with the pressure discharged from the final stage. Furthermore, lubricating oil, the pressure of which is equivalent to the level of the pressure discharged from each compression element, is introduced into a back side chamber of a vane of each compression element to urge the back side of each vane with the pressure of lubricating oil. As a result, the wear of the tip end of the vane and the input loss are prevented. Therefore, satisfactory durability and compression efficiency can be obtained.

Multistage compressor for compressing gases

The invention relates to a multistage compressor (1) for compressing gases with a low-pressure region (7) and a high-pressure region (4), whereby the high pressure region (4) comprises at least one reciprocating piston compressor (3), driven by a crankshaft (5) and the low pressure region (7) comprises at least one screw compressor (20) as low pressure compressor (6) with a rotating displacer (8) which is coupled to the crankshaft (5) of the reciprocating piston compressor (3).

A SYSTEM FOR EQUALISING LUBRICATING OIL LEVELS IN PARALLEL CONNECTED COMPRESSORS

Multi-stage vacuum pump

A multi-stage vacuum pump, comprising at least one higher vacuum stage 30, 40, 50, at least one lower vacuum stage 60, 70, 80, 85, and an over-pressure device 120 operable to selectively couple said lower vacuum stage with said higher vacuum stage. This over-pressure device serves as a relief valve, to allow for reduction of pressure in the low vacuum stages thereby preventing improper pump operation. The over-pressure device may comprise a valve biased closed by a biasing force, the valve actuated by a pressure differential between said higher and lower vacuum stages. The stages may comprise a common rotor urged into position by an urging force, where his urging force exceeds said biasing force. The over pressure device may draw working fluid from a lower vacuum stage with the lowest vacuum, or one other than the highest vacuum lower vacuum stage. The over-pressure device may deliver working fluid to a highest vacuum stage of the lower vacuum stages, or to a stage other than the highest ...

Rotary compressor

... 981,490. Rotary compressors. WORTHINGTON CORPORATION. April 27, 1962 [Sept. 27, 1961], No. 16133/62. Heading F1F. ' A two-stage rotary compressor 20, 30 (Fig. 1) for a refrigerating system is mounted in a hermetically sealed housing 2 and driven by an electric motor in a housing 3. Each stage of the compressor comprises a rotor 40, 401 (Fig. 2) with outwardly sliding vanes and a casing having two inlets and two outlets, the outlets 23, 26 of the first stage being axially aligned with the inlets 35, 33 of the second stage. The compressor is lubricated by oil forced through passages 70, 71, 72, 74, 73 to nozzles 76 in the casing inner walls (see also Fig. 6). The profile of the inner wall of the casing (Fig. 11) which is symmetrical about the major and minor axes comprises, on each side of the major axis, an arc 81 centred on the rotor axis and subtending between 10 degrees and 20 degrees at the axis, bounded by arcs 82 of radius R T , subtending between 12 degrees and 30 degrees ...

Kinetic energy recovery system

A kinetic energy recovery and/or storage system 12 for a motor vehicle 10 is provided. The kinetic energy recovery system 12 comprises: a flywheel 14 supported for rotation on a shaft 16 in a first vacuum enclosure 22 for receiving energy from and dissipating energy to one or more parts 20 of the vehicle 10; a scroll vacuum pumping arrangement 24 having an inlet 31 arranged to be in fluid communication with an outlet 30 of the first vacuum enclosure 22 for evacuating the first vacuum enclosure 22; a second vacuum enclosure 32 having an inlet 34 in fluid communication with an exhaust 33 of the scroll pumping arrangement 24 and arranged to be maintained at a pressure less than atmosphere for reducing the pressure at the exhaust 33 of the scroll pumping arrangement 24. The second vacuum enclosure 32 comprises an outlet 36 through which gas can be pumped periodically for maintaining the second vacuum enclosure 32 at a pressure less than atmosphere.

Sealing between a cover plate and the pumping chamber or a multiple stage pump

Disclosed is a multi-stage pump which has multiple chambers 18 located in a stator 10 with multiple inter-stage walls 14, where a there is a cover plate mounted to cover a surface of the stator, that surface forming an end surface 20 of the inter-stage walls, where a gasket is mounted between the cover and stator such that it prevents inter-stage leakage and provides a seal between the stator and the cover. The gasket may be rectangular. The gasket may include apertures to allow access for probes. The gasket may include at least one pressure relief aperture between two stages. The pump may be a roots vacuum pump. The pump may include two covers each with a respective gasket. Also claimed is a method of servicing a pump with such a stator, cover and gasket arrangement.

Rotary compressor and vapor-compression refrigeration cycle device

The present invention has a valve mechanism (50) that blocks an oil-supply flow path during non-compression operation and opens same during compression operation, said oil-supply flow path guiding lubricating oil that is inside a sealed container (3), to a gap between a vane (24) and a vane groove (29), via a vane rear chamber (25).

Meshing-screw

In a double-entry screw compressor i.e. having two pairs of oppositely pitched rotors disposed end-to-end, both the male or main rotors H1 and H2 and the female or secondary rotors N1 and N2 are mutually angularly offset. The offset is up to one half of the screw pitch; and the rotor profiles are asymmetric. This arrangement ensures that fluid being compressed is not trapped in closed pockets T on one side of the abutment plane of the rotors, since the pockets T are vented via an opening(s) D1 and/or D2 to the grooves in the rotors on the other side of the said plane. ...

Vacuum pump

Improvements in air-pumps

... 377,476. Centrifugal pumps. DRYSDALE & CO., Ltd. and DRYSDALE, J. W. W., Bon-Accord Works, Ferry Road, Yoker, Glasgow. Sept. 1, 1931, Nos. 24507/31 and 13296/32. [Class 110 (i) ] In a two stage pump of the " water-ring a type, the impellers 1, 2 are spaced axially on shaft 3 by a diaphragm 4, which contains suction and discharge ports on each side for air, or other gas, being pumped. The impellers may act in series as in Fig. 1, or in parallel. The lower half 6 of the split casing contains inlet and outlet ports 7, 8. Wear plates 21 are provided on each side of the diaphragm. The diaphragm may be provided with ports for directing sealing liquid to and from the rotors. The sealing liquid system may be independent of one another. The suction and discharge ports in the diaphragm walls may be made larger than necessary to facilitate positioning with the corresponding ports in the plates 21.

Scroll apparatus

Improvements relating to rotary pumps

... 161,160. Soc. Anon. pour l'Exploitation des ProcÚdÚs M. Leblanc- Vickers, (formerly Soc. Anon. pour l'Exploitation des ProcÚdÚs Westinghouse-Leblanc). March 30, 1920, [Convention date]. Grinding interfitting parts together. - In a rotary engine with intergeared pistons of the Roots'-blower type the working surfaces of the pistons a are milled to a templet and the one set is ground on the other set, the shafts being geared together by the gear wheels B and forced towards each other.

A module for a vacuum pumping and/or abatement system

PLANT FOR HIGH PRESSURE COMPRESSION WITH SEVERAL STAGES

COMPRESSOR WITH HERMETICALLY SEALED HOUSING

ROTARY COMPRESSOR WITH MUFFLER

MULTI-LEVEL ROTARY COMPRESSOR AND A COOLING DEVICE

ROTARY COMPRESSOR OF THE HORIZONTAL DESIGN

DREHKOLBENMASCHINE FOR SEALINGCASH MEDIA

MULTI-LEVEL COMPRESSOR PLANT AND PROCEDURE FOR THE REGULATION THE SAME

TWO-STAGE SCREW COMPRESSOR

COMPOUND VACCUM PUMPS

Rotary compressor

The compression section (12) of this rotary compressor (1) is provided with: an intermediate partition plate (140) disposed between an upper cylinder (121T) and a lower cylinder (121S); an upper vane (127T) for dividing an upper cylinder chamber (130T) formed within the upper cylinder (121T) into an upper suction chamber (131T) and an upper compression chamber (133T); and a lower vane (127S) for dividing a lower cylinder chamber (130S) formed within the lower cylinder (121S) into a lower suction chamber (131S) and a lower compression chamber (133S). The intermediate partition plate (140) has formed therein: an injection hole (140b) for injecting a liquid refrigerant into the upper compression chamber (133T) and the lower compression chamber (133S); and an injection passage (140a) for supplying a liquid refrigerant to the injection hole (140b). The injection passage (140a) is formed along a straight line (141) not intersecting a rotating shaft insertion hole (123) into which a rotating shaft ...

Scroll-type fluid machine

Rotary compressor

Installation for high pressure compression with several stages

Rotary fluid machine

Compressor, air conditioner system comprising the compressor and heat pump water heater system

A compressor, an air conditioner system comprising the compressor and a heat pump water heater system. The compressor comprises: a low-pressure compression component, a medium-pressure chamber, a low-pressure chamber air discharge passageway, an enthalpy-increasing component, a high-pressure compression component, a medium-pressure air passageway and a high-pressure chamber air discharge passageway. The medium-pressure air passageway comprises a side passageway section of the low-pressure chamber air discharge passageway and a side passageway section of a high-pressure chamber air suction passageway, and a ratio between a minimum cross section area of the side passageway section of the low-pressure chamber air discharge passageway and a minimum cross section area of the side passageway section of the high-pressure chamber air suction passageway is from 1.4 to 4. In the compressor, the pressure impulse and the flow speed impulse of the refrigerant are relatively small, the first-stage air ...

Rotary compressor

The compression section (12) of this rotary compressor (1) is provided with: an intermediate partition plate (140) disposed between an upper cylinder (121T) and a lower cylinder (121S); an upper vane (127T) for dividing an upper cylinder chamber (130T) formed within the upper cylinder (121T) into an upper suction chamber (131T) and an upper compression chamber (133T); and a lower vane (127S) for dividing a lower cylinder chamber (130S) formed within the lower cylinder (121S) into a lower suction chamber (131S) and a lower compression chamber (133S). The intermediate partition plate (140) has formed therein: an injection hole (140b) for injecting a liquid refrigerant into the upper compression chamber (133T) and the lower compression chamber (133S); and an injection passage (140a) for supplying a liquid refrigerant to the injection hole (140b). The injection passage (140a) is formed along a straight line (141) not intersecting a rotating shaft insertion hole (123) into which a rotating shaft ...

Multistage compressor unit and method for regulating such multistage compressor unit

Oil amount detector, refrigeration apparatus and air conditioner

INTEGRATED MULTI-UNIT REFRIGERATION MOTOR-COMPRESSOR ASSEMBLY

MULTISTAGE SCREW ROTOR MACHINE

INTEGRATED MULTI-UNIT REFRIGERATION MOTOR-COMPRESSOR ASSEMBLY

INTEGRATED MULTI-UNIT REFRIGERATION MOTOR-COMPRESSOR ASSEMBLY Two motor-compressor units of the vertical shaft type are housed in spaced parallel relation in a common sealing housing. A hollow chambered partition extends transversely within the housing between the units and is attached to the side walls and top wall but spaced from the bottom wall. The partition functions as a suction gas header, substantially isolates the suction areas above the oil level, and stiffens the housing walls, inhibiting resonant vibration.

ROTARY CHAMBER-TYPE COMPRESSOR

VACUUM PUMP

A vacuum pump may include a stator located between an intake plate and a back plate. Mating portions on the intake plate and back plate may be used to properly locate the stator. The stator may comprise a tubular piece of material. The stator may include two internal pump chambers separated by a divider plate. In some embodiments, the divider plate may have a fluid passageway extending therethrough. A rotor in each chamber may include vanes and may be offset from the center of the chamber. Each rotor may be fixed to a rotatable shaft for operation of the vacuum pump.

HORIZONTAL SCROLL COMPRESSOR

A horizontal scroll-type compressor (10) is provided with an oil injection fitting (80) that extends through the compressor shell (12) and communicates lubricating oil to a lubrication passage in the crankshaft (40, 41) for providing lubricant to the compressor and other components. The oil injection fitting is supplied with lubricant from an externally disposed source.

HORIZONTAL TWO STAGE ROTARY COMPRESSOR WITH IMPROVED LUBRICATION STRUCTURE

A hermetic rotary compressor including a housing having an oil sump formed therein; a stationary shaft fixedly mounted in the housing, a longitudinal bore formed in the shaft; and a motor mounted in the housing, the motor having a rotor and a stator, the rotor having a first and second end and being rotatably mounted on the shaft. A pair of compression mechanisms is rotatably mounted on the shaft, the compression mechanisms rotatably coupled to the rotor and lubricated with oil conducted through the longitudinal bore each of the compression mechanism has an outboard bearing rotatably mounted on the shaft, and an oil pump in fluid communication with the longitudinal bore is also mounted on the stationary shaft, the pump operatively engaged with one of the outboard bearings. The oil pump is actuated by rotation of one of the outboard bearings, and oil is pumped from the sump into the longitudinal bore by the oil pump.

COMPRESSOR SYSTEM WITH INTERNAL AIR-WATER COOLING

The invention relates to a compressor system with a system housing, in which heat generating system components are arranged comprising at least one compressor stage for compressing a gaseous medium. In addition, the compressor system has an air water cooler, a blower which generates a cooling air flow, and air conducting elements, which conduct the heated air from the system components to the air water cooler. In accordance with the invention, a cooling air channel is configured which has an inlet opening in the upper section of the system housing and an outlet opening in the lower section of the system housing, wherein upper air conducting elements are positioned in order to conduct the cooling air flow after flowing through the air water cooler to the inlet opening, and lower air conducting elements are positioned in order to conduct the cooling air flow from the outlet opening to the system components.

ACCESS COVER FOR PRESSURIZED CONNECTOR SPOOL

A connector spool for connecting a compressor casing to a drive casing of an industrial compression system includes a spool body having a substantially cylindrical shape. The body has a first end coupled to the compressor casing and a second end coupled to the drive casing, and the body defines an interior region. Access ports are formed in the body for providing access to the interior region, and a hoop-shaped pressurized member covers the access ports.

HIGH EFFICIENCY HEATING AND/OR COOLING SYSTEM AND METHODS

HVAC systems and methods for delivering highly efficient heating and cooling using ambient air as the working fluid. A plenum has an upstream inlet and a downstream outlet, each in fluid communication with a target space to be heated or cooled. Ambient air is drawn into the inlet at an incoming pressure and an incoming temperature. The inlet and outlet are gated, respectively, by first and second rotary pumps. A heat exchanger in the plenum transfers heat into or out of the air, provoking a change in air volume within the plenum. The systems and methods are configured to operate essentially between the working temperatures, THIGH and TLOW. This technique, called Convergent Refrigeration or counter-conditioning, provides for the reduction of excess refrigerant lift by optimization of the heat transfer temperature. Two Convergent Refrigeration systems can be arranged back-to-back through a common heat exchanger for ultra-high efficiency operation.

APPARATUSES, SYSTEMS, AND METHODS FOR IMPROVED PERFORMANCE OF A PRESSURIZED SYSTEM

A system, apparatus, and method for improving performance of a pressurized system having a natural gas reciprocating compressor pump. The sound attenuation device has a pipe having an outlet connected to one or more tuned loops, where each loop includes a junction that divides a flow into two pipes. Another junction reconnects the two pipes to an outlet pipe, where the outlet pipe of the loops is coupled to the former junction of the loops. The loop has an inlet coupled to the outlet of a reciprocating compressor cylinder. Between the branches one of the branches is longer than another branch by an amount equal to a wavelength within a range of wavelengths of vibrations propagating in a fluid discharged from the reciprocating compressor pumping system.

ROTARY TYPE MULTI-STAGE GAS COMPRESSOR

A multi-stage rotary type compressor is constituted in such a manner that an electric motor and a plurality of compression elements to be driven by the electric motor are disposed in a closed container and the compression elements thus-disposed are sequentially connected in series. The compressor thus-constituted is arranged in such a manner that the space in the closed container is filled with the pressure discharged from the final stage. Furthermore, lubricating oil, the pressure of which is equivalent to the level of the pressure discharged from each compression element, is introduced into a back side chamber of a vane of each compression element to urge the back side of each vane with the pressure of lubricating oil. As a result, the wear of the tip end of the vane and the input loss are prevented. Therefore, satisfactory durability and compression efficiency can be obtained.

TWO STAGE VACUUM PUMPING APPARATUS

Vacuum pumping apparatus includes a non-scroll type auxiliary pump (60) and a scroll pump (62) disposed in a single housing (52). The auxiliary pump and the scroll pump are connected in series and are driven by a common motor (68). Typically, the auxiliary pump has a relatively high pumping speed and the scroll pump has a relatively high compression ratio. The auxiliary pump may be a regenerative blower, a roots-type blower or a screw-type blower. When a corotating scroll pump is utilized, a regenerative blower may be formed at or near the outer periphery of a disk on which the non-orbiting scroll blade is mounted. In another configuration, first and second scroll pumps are disposed within a housing. The scroll blade sets of the first and second scroll pumps have different orbiting radii. Scroll pump leakage may be reduced by forming a closed-loop seal around the inlet region of the scroll pump and connecting the inlet region to an intermediate pressure. Scroll pump leakage and contamination ...

Zweistufiger Rotationskompressor oder zweistufige Rotationsvakuumpumpe.

Zweistufige Drehkolbenvakuumpumpe mit sichelförmigem Arbeitsraum.

Zweistufige Flüssigkeitsring-Luftpumpe.

Flüssigkeitsringpumpe zur Gasförderung

Mehrstufige Flüssigkeitsring-Gaspumpe

Drehkolben-Hochvakuumpumpen-Anlage mit Flüssigkeitsdichtung zum Absaugen von gesättigten oder ungesättigten Dämpfen.

Groupe pompe à huile/pompe à air

Zweistufige Flüssigkeitsring-Pumpe.

Mehrstufige Flüssigkeitsring-Pumpe zur gemeinsamen Förderung von Gasen und Flüssigkeiten.

Mehrstufige Flüssigkeitsring-Luftpumpe.

Abgaslader für Verbrennungskraftmaschinen

Flüssigkeitspumpe mit umlaufendem Zellenrad.

Pompe à vide

Schraubenradmaschine

Zweistufige Verdichteranlage mit direkter Luftkühlung

Pompe à vide

Mehrstufige Rotationsvacuumpumpe

Mehrstufige Vakuumpumpeneinrichtung mit Drehkolben

Zweistufige Drehschieber-Ölluftpumpe

Schraubenradverdichter

Mehrstufiger Drehkolbenkompressor

Rotationsvacuumpumpe mit Schraubenrotoren

Roots pump

ROTATION POSITIVE-DISPLACEMENT PUMP.

Multistage exhauster

The exhauster unit has two or more rolling-piston stages in series, each, seen in the flow direction, being of smaller capacity than the preceding one. Each following stage (2,6) has a drive mechanism (4) incorporating a freewheel. Any such stage can be without a bypass valve, and with a threestage system the intermediate and high-pressure stages can be driven via freewheels.

Vacuum cooling apparatus and method for operating such a vacuum cooling facility.

Die Erfindung geht aus von einer Vakuumkühlanlage (10) mit einer verschliessbaren Vakuumkammer (11), deren Innenraum (11a) mit abzukühlendem Backgut (16) beschickbar ist, mit wenigstens einer über eine Ansaugleitung (23) mit dem Innenraum (11a) der Vakuumkammer (11) in Verbindung stehenden Vakuumpumpe (12), sowie mit einer Kammersteuerung (13), mittels derer der Druck in der Vakuumkammer (11) und/oder die Temperatur im Backgut (16) in Abhängigkeit von der Zeit entlang einer vorgegebenen Kurve verändert werden kann. Ein vereinfachter Aufbau der Anlage wird dadurch erreicht, dass die wenigstens eine Vakuumpumpe (12) eine motorgetriebene, drehzahlgeregelte, trockenverdichtende Klauen-Vakuumpumpe ist, dass die Kammersteuerung (13) über eine Motorsteuerung (14) die Drehzahl der wenigstens einen Vakuumpumpe (12) steuert, und dass der Eingang der wenigstens einen Vakuumpumpe (12) direkt mit dem Innenraum (11a) der Vakuumkammer (11) fluidtechnisch verbunden ist.

Mehrstufige und energiesparende Vakuumpumpenanordnung mit Wälzkolbenvakuumpumpe in der ersten Stufe.

Eine mehrstufige und energiesparende Vakuumpumpenanordnung mit einer Wälzkolbenvakuumpumpe in der ersten Stufe umfasst ein an einer Ansaugeinlassöffnung angeordnetes Absperrventil (13), durch welches ein nicht-kondensiertes Gas empfangen wird, das von einem Kondensator eines Kraftwerks abgesaugt wird, wobei eine erste Wälzkolbenvakuumpumpe (1) mit dem an der Ansaugeinlassöffnung angeordneten Absperrventil verbunden ist, um das das an der Ansaugeinlassöffnung angeordnete Absperrventil passierende Gas zu empfangen und zu komprimieren, wobei ferner mindestens eine zweite Vakuumpumpe (2) angeordnet ist, die seriell mit der ersten Wälzkolbenvakuumpumpe verbunden ist, um das von der ersten Wälzkolbenvakuumpumpe (1) vorkomprimierte Gas weiter zu komprimieren, wobei sämtliche zweite Vakuumpumpen seriell verbunden sind, wenn mehr als eine zweite Vakuumpumpe (2) vorhanden ist. Eine letztstufige Vakuumpumpe (3) ist mit der zweiten Vakuumpumpe (2) verbunden, um das von der zweiten Vakuumpumpe (2) ausgestoßene ...

УСТРОЙСТВА, СИСТЕМЫ И СПОСОБЫ ДЛЯ УЛУЧШЕНИЯ РАБОЧИХ ХАРАКТЕРИСТИК НАПОРНОЙ СИСТЕМЫ

Система, устройство и способ для улучшения рабочих характеристик напорной системы, содержащей насос на основе поршневого компрессора для природного газа. Устройство для ослабления звука содержит трубопровод, имеющий выход, соединенный по меньшей мере с один из настроенных контуров, причем каждый контур содержит разветвитель, который разделяет поток между двумя трубопроводами. Еще один разветвитель соединяет указанные два трубопровода с выходной трубой, при этом указанная выходная труба указанных контуров соединена с указанным разветвителем контуров. Контур имеет вход, соединенный с выходом цилиндра поршневого компрессора. Одна из ветвей длиннее, чем другая ветвь на величину, равную длине волны в пределах диапазона длин волн колебаний, распространяющихся в текучей среде, выпущенной из насосной системы на основе поршневого компрессора.

ECCENTRIC PUMP WITH MOVABLE BLADES

Discharge muffler and two-stage compressor including the same

A discharge muffler includes a muffler container. In the muffler container, refrigerating machine oil is separated from refrigerant gas containing the refrigerating machine oil, and the refrigerating machine oil is stored in a lower space. An inlet of an outlet pipe connected to the muffler container opens in the lower space.

Compressor and Refrigerating Cycle Apparatus

In a conventional compressor, since a motor and a mechanical section of the compressor are disposed in one and the same closed container, the motor is exposed to high-temperature coolant and heated, and the efficiency of the motor is lowered. Further, during the operation of the compressor, the coolant circulating in the refrigerating cycle conveys additional heat generated by the motor coil. Thus the efficiency of the refrigerating cycle is lowered. The compressor according to the present invention includes a compression chamber divided into a closed chamber and an open chamber separated by a magnetic induction plate from each other. The closed chamber is filled with high temperature and pressure coolant and the rotor of the motor is disposed in the closed chamber, and the stator of the motor is disposed in the open chamber.

TWO-STAGE MEDIUM-PRESSURE SCREW-TYPE AIR COMPRESSOR SET

A two-stage medium-pressure screw air compressor comprises a primary screw compressor () and a secondary screw compressor () communicating with the gas-liquid separator () via the first gas-liquid inlet (). A first oil outlet () is connected to a mid section of a gas-liquid separator (). The oil is injected into the lubricating components of the compressor is the first oil outlet (), a first filter (). A secondary oil-water separator () is connected to the first oil outlet () of the gas-liquid separator (), the second oil-water separator () has an upper separating tank () and a lower separating tank. The water and the impurities contained in the lubricating oil can be eliminated at a largest extent, so as to create essential condition thr ensuring the screw compressor to operate continuously, stably and safely and provide high operational reliability, safety and long service life. 1. A two-stage medium-pressure screw air compressor , comprising:a primary screw compressor driven by a motor;a secondary screw compressor also driven by the motor;a gas-liquid separator having a side wall with a first gas-liquid inlet connected to the side wall and a first oil outlet connected to a mid section of the side wall, the secondary screw compressor communicating with the gas-liquid separator via the first gas-liquid inlet;{'sub': ':', 'a plurality of oil distributors for receiving processed oil from the gas-liquid separator via the first oil outlet, a first filtera cooler and an oil tube;'}a secondary oil-water separator connected to the first oil outlet of the gas-liquid separator, the secondary oil-water separator having an upper separating tank with a top and a bottom and a lower separating tank with a top and a bottom, a plurality of brackets being mounted on the lower separating tank and the upper separating tank being mounted on top of the plurality of brackets;a second oil inlet connecting to the top of the upper separating tank, the second oil inlet having an ...

Vacuum pumping

In order to prevent excessive motor loading or system overheating due to the accumulation of particulate or dust, from SACVD type CVD processes, in the running clearances of the vacuum pump a vacuum pumping arrangement is provided having a plurality of vacuum pumping stages and comprising a first pump inlet through which process fluid from the vacuum chamber can enter the pump and pass through each of the pumping sections towards a pump outlet, and a second pump inlet through which process fluid can enter the pump and pass through only one or more pumping stages downstream of the most upstream pumping stage, wherein the apparatus configured to conveying process fluid from the vacuum chamber to the first pump inlet for pumping during the second processing step and conveying process fluid from the vacuum chamber to the second pump inlet for pumping during the first processing step.

Compression device, and a thermodynamic system comprising such a compression device

This compression device comprises first and second compressors mounted in parallel, a suction line intended to be connected to an outlet of an evaporator, first and second suction conduits arranged for putting the suction line respectively in communication with the admission orifices of the first and second compressors, and an oil level equalization conduit connecting the oil pans of the first and second compressors. The compression device further comprises an oil separator mounted on the suction line or on the second suction conduit, and an oil return conduit arranged for connecting an oil outflow orifice of the oil separator to the oil pan of the first compressor.

Pump

The present invention relates to a multi-stage vacuum pump having a plurality of compression stages 12, 14, 16, 18 20 and a booster stage 22. The pump 10 is arranged to pump a chamber 24. The pumping stages include respective rotors supported for rotation on one or more common drive shafts 26. A recirculation valve 28 is associated with the booster stage 22 for selective recirculation of pumped fluid from an outlet 32 to an inlet 30 of the booster stage above a predetermined pressure.

Compressor unit including gear rotor and compressor system using the same

A compressor unit having a gear rotor, and a compressor system using the same are provided. The compressor system includes a compressor unit having a triple trochoidal rotor, which includes a first rotor, a second rotor, a third rotor, a casing, second and first suction ports, and second and first discharge ports; and a driving unit that rotates the three rotors such that external working fluid is sucked into the suction port and the working fluid sucked into the suction port is discharged to the discharge port in a state of being compressed. The compressor unit may be constructed as a triple trochoidal rotor such that working fluid can be compressed in a two-stage compression manner to enable the working fluid to be supplied at high pressure and provide a high-speed, high-pressure compression capability.

COMPRESSED GAS SUPPLY UNIT

A compressed gas supply unit has scroll compressors. Gas discharged from the scroll compressors travels through a main supply passage and is reserved in a reservoir tank, after which the gas is supplied to a gas recipient from a supply passage. The scroll compressors include inverter devices that allow for independent modulation of the speeds of respective drive motors. The controller includes a speed range setting unit that sets an upper speed limit and a lower speed limit of the scroll compressors, a speed sum calculating unit that calculates a sum of speeds of the scroll compressors based on a load of the compressed gas supply unit, and a speed setting unit that allocates the calculated sum of speeds among the scroll compressors to set speeds for scroll compressors respectively. 1. A compressed gas supply unit , comprising: a plurality of scroll compressors , an inverter device allowing independent modulation of speeds of the respective scroll compressors , a merge pipe or a reservoir tank for collecting gas discharged from the plurality of scroll compressors , a pressure sensor detecting discharge pressure of the plurality of scroll compressors , and a controller controlling the inverter device for modulating the speeds of the respective scroll compressors ,the controller including a speed range setting unit that sets an upper speed limit and a lower speed limit of the plurality of scroll compressors, a calculating unit that calculates a sum of speeds of the plurality of scroll compressors based on a load of the compressed gas supply unit, and a speed setting unit that allocates the calculated sum of speeds among the scroll compressors to set speeds for the respective scroll compressors, whereinwhen the sum of speeds calculated by the calculating unit is lower than a sum of upper speed limits of all the scroll compressors, the speed setting unit reduces the speed of a first scroll compressor by a first difference between the calculated sum of speeds and the sum ...

ROOTS PUMP AND EXHAUST METHOD

According to one embodiment, a roots pump includes a first roots pump, a second roots pump, and a connection passage. The first roots pump includes a first casing which has a first pump chamber. The second roots pump includes a second casing which has a second pump chamber. The connection passage connects an exhaust hole which is provided in the first pump chamber to an intake hole which is provided in the second pump chamber. 1. A roots pump comprising:a first roots pump including a first casing which has therein a first pump chamber, a first gas transfer member which is disposed inside the first pump chamber and rotates so as to transfer a gas in a predetermined direction, and a first support member which supports the first gas transfer member;a second roots pump including a second casing which has therein a second pump chamber, a second gas transfer member which is disposed inside the second pump chamber and rotates so as to transfer a gas in a predetermined direction, and a second support member which supports the second gas transfer member; anda connection passage connecting an exhaust hole which is provided in the first pump chamber to an intake hole which is provided in the second pump chamber.2. The roots pump according to claim 1 , wherein in the connection passage claim 1 , a cross-sectional area perpendicular to a gas transfer direction decreases as it goes from the first roots pump toward the second roots pump.3. The roots pump according to claim 1 , whereinthe first casing, the first gas transfer member, and the first support member are formed of a material without corrosion resistance, andthe second casing, the second gas transfer member, and the second support member are formed of a material with corrosion resistance.4. The roots pump according to claim 1 , whereinthe first pump chamber has a plurality of pump chambers,the second pump chamber has a plurality of pump chambers, andthe connection passage is connected between a pump chamber constituting ...

Suction Header Arrangement for Oil Management in Multiple-Compressor Systems

A refrigeration system with two or more compressors configured to compress a flow of refrigerant with oil entrained therein. A suction flow piping arrangement is configured to supply a flow of refrigerant and oil to the two or more compressors. The suction flow piping arrangement has a suction header configured to carry the flow of refrigerant and oil, and a primary compressor supply conduit connected to the suction header. The primary compressor supply conduit supplies refrigerant and oil to a first compressor of the two or more compressors. A secondary compressor supply conduit branches off from the suction header. The secondary compressor supply conduit supplies refrigerant to a second compressor of the two or more compressors. The primary compressor supply conduit is configured to supply more oil to the first compressor than the secondary compressor supply conduit supplies to the second compressor.

VACUUM PUMP STATORS AND VACUUM PUMPS

Combined booster and primary pump arrangements can be bulky and require separate supplies of purge gas and cooling water. In order to overcome this problem invention provides a vacuum pump in which two or more pumping mechanisms, i.e. the booster pump and main pump, are housed in the same stator. The invention further provides a vacuum pump stator comprising at least two operatively interconnected cavities, wherein at least two of the cavities each comprise at least one rotor-receiving portion shaped to receive two or more at least partially intermeshing rotors, and wherein an axis of a rotor-receiving portion of a first one of the cavities is offset with respect to an axis of a rotor-receiving portion of a second one of the cavities. 1. A vacuum pump stator comprising at least two cavities , wherein at least first cavity of the at least two cavities and a second cavity of the at least two cavities each comprises a respective rotor-receiving portion shaped to receive at least one pair of intermeshing rotors , and wherein an axis of the respective rotor-receiving portion of the first cavities cavity is offset with respect to an axis of the respective rotor-receiving portion of the second cavity.2. The vacuum pump stator of claim 1 , wherein the at least two cavities are operatively interconnected by a conduit.3. The vacuum pump stator of claim 2 , wherein the conduit extends through a body of the vacuum pump stator to interconnect two cavities of the at least two cavities.4. The vacuum pump stator of any of claim 2 , or claim 2 , wherein at least one cavity of the at least two cavities comprises a plurality of axially aligned claim 2 , and interconnected claim 2 , rotor-receiving portions.5. The vacuum pump stator of claim 4 , wherein each of the plurality of axially aligned claim 4 , and interconnected claim 4 , rotor receiving portion is adapted claim 4 , in use claim 4 , to receive a pair of intermeshing rotors claim 4 , a first rotor of each pair of intermeshing ...

Rotary compressor

A rotary compressor includes a sealed vertical compressor housing, a compressing unit, and a motor. A refrigerant discharging unit is provided at an upper part and a refrigerant intake unit is provided at a lower part side surface in the sealed vertical compressor housing. The compressing unit is disposed on the lower part of the compressor housing, includes an annular cylinder, an end plate including a bearing unit and a discharge valve unit and blocking end portions of the cylinder, an annular piston that engages with an eccentric portion of a rotation axis supported by the bearing unit, revolves along a cylinder inner wall of the cylinder in the cylinder, and forms a cylinder chamber between the cylinder inner wall and the annular piston, and a vane. The motor is disposed on the upper part of the compressor housing, and drives the compressing unit via the rotation axis.

VACUUM EXHAUST SYSTEM AND CHANNEL-SWITCHING VALVE USED IN THIS VACUUM EXHAUST SYSTEM

A vacuum exhaust system which exhausts gas from chambers and which comprises a plurality of branch channels for the exhaustion of the gas from the chambers, a main pipeline in the form of a confluence of the plurality of branch channels, channel open-close valves fitted to correspond with each of the said plurality of branch channels, a channel-switching valve connecting the main channel and a plurality of selection channels and allowing flow between the main channel and any one of the plurality of selection channels, a first pump which functions as a gas exhaust means in the molecular flow region of the gas and is fitted to one of the plurality of branch channels, and second pumps which function as gas exhaust means in the viscous flow region of the gas and are fitted to the plurality of selection channels. 1. A vacuum exhaust system characterised in that it is a vacuum exhaust system which exhausts gas from a chamber which comprises:a plurality of branch channels for the exhaustion of the gas from the chamber,a main channel formed from a confluence of the plurality of branch channels and connected to a plurality of selection channels by a channel-switching valve,a respective channel open-close valve fitted to each of the plurality of branch channels,a first pump which functions as a gas exhaustion means in the molecular flow region of the gas and is fitted to any of the plurality of branch channels, andsecond pumps which function as gas exhaustion means in the viscous flow region of the gas, the said second pumps fitted to the plurality of selection channels.2. The vacuum exhaust system claim 1 , according to claim 1 , characterised in that it is furnished with a third pump which functions as a means of increasing the exhaustion rate in a pressure region in which the exhaustion rate of the second pump is lower claim 1 , and the third pump is fitted to any one of the said plurality of branch channels.3. The vacuum exhaust system claim 1 , according to claim 1 , ...

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 ...

VARIABLE CAPACITY COMPRESSOR

A variable capacity compressor is provided, including: two cylinders and a middle plate; at least one flow channel provided in the middle plate, wherein one end of the flow channel is connected to an exhaust chamber of any one of the two cylinders, the other end is connected to a suction chamber of the other one of the two cylinders. In present disclosure, by setting a flow channel in the middle plate of the variable capacity compressor, the exhaust chamber of one cylinder is connected to the suction chamber of the other cylinder. When the flow channel is completely closed, the two cylinders operate independently; when the flow channel is opened, the refrigerant in the exhaust chamber flows into the suction chamber through the flow channel, that is, the upper cylinders and the lower cylinder are connected to each other, which can adjust the capacity of the compressor. 1. A variable capacity compressor , comprising:two cylinders;a middle plate, separating the two cylinders, and at least one flow channel provided in the middle plate, wherein one end of the flow channel is connected to an exhaust chamber of any one of the two cylinders, the other end of the flow channel is connected to a suction chamber of the other one of the two cylinders; each flow channel is provided with a flow control component for adjusting flow rate of refrigerant flowing through the flow channel.2. The variable capacity compressor of claim 1 , wherein the flow control component comprises a first slider provided in the middle plate claim 1 , and the first slider is capable of moving along a radial direction of the middle plate to change an effective flow area of the flow channel claim 1 , which adjusts the flow rate of the refrigerant flowing through the flow channel.3. The variable capacity compressor of claim 2 , wherein the first slider is driven by a solenoid valve claim 2 , so that the first slider moves along the radial direction of the middle plate.4. The variable capacity compressor of ...

Dual-cylinder two-stage variable cpacity compressor

A dual-cylinder two-stage variable capacity compressor is provided, including: a first cylinder, having an exhaust port connected to a first exhaust channel: a second cylinder, wherein the second cylinder is provided with a ventilating slider, and the ventilating slider is provided with a first gas transit channel and a second gas transit channel; wherein, when the ventilating slider is at a first connecting position, the first exhaust channel is connected to a suction channel in a second cylinder when the ventilating slider is at a second connecting position, the first exhaust channel is connected to a second exhaust channel. The compressor of the present disclosure can vary its own capacity, that is, the variation of the compressor's capacity can be realized by arranging a ventilating slider, which will meet the requirements of variation loads of the compressor in different seasons.

COMPRESSOR AND AIR CONDITIONER

A compressor includes a low-pressure stage cylinder, a first high-pressure stage cylinder and a second high-pressure stage cylinder which are stacked, a partition is arranged between each two adjacent cylinders, the first and second high-pressure stage cylinders are both situated at a same side of the low-pressure stage cylinder or respectively situated at two sides of the low-pressure stage cylinder, the lower flange is situated below the low-pressure stage cylinder, the first high-pressure stage cylinder and the second high-pressure stage cylinder. A first sliding sheet is provided in the first high-pressure stage cylinder, a second sliding sheet is provided in the second high-pressure stage cylinder, and a third sliding sheet is provided in the low-pressure stage cylinder. The first and the second high-pressure stage cylinders are arranged in parallel, and the first and second high-pressure stage cylinders arranged in parallel are connected to the low-pressure stage cylinder in series. 1. A compressor , comprising:a low-pressure stage cylinder, a first high-pressure stage cylinder, a second high-pressure stage cylinder and a lower flange, wherein,the low-pressure stage cylinder, the first high-pressure stage cylinder and the second high-pressure stage cylinder are stacked, and a partition is arranged between each two adjacent cylinders, the first high-pressure stage cylinder and the second high-pressure stage cylinder are both situated at a same side of the low-pressure stage cylinder or the first high-pressure stage cylinder and the second high-pressure stage cylinder are respectively situated at two sides of the low-pressure stage cylinder, the lower flange is situated below the low-pressure stage cylinder, the first high-pressure stage cylinder and the second high-pressure stage cylinder;the first high-pressure stage cylinder has a first sliding sheet slot, and a first sliding sheet is provided in the first sliding sheet slot, the second high-pressure stage ...

CONCENTRIC VANE COMPRESSOR

A positive displacement device includes a first cylinder, a second cylinder disposed within the first cylinder, and a third cylinder disposed around the first cylinder. An interior surface of the first cylinder and an exterior surface of the second cylinder define an inner cavity. An exterior surface of the first cylinder and an interior surface of the third cylinder define an outer cavity. A partition between the interior surface of the first cylinder and the exterior surface of the second cylinder divides the inner cavity into inner regions, and another partition between the exterior surface of the first cylinder and the interior surface of the third cylinder divides the outer cavity into outer regions. The second cylinder and the third cylinder orbit with respect to the first cylinder to create alternating regions of high pressure and low pressure in the inner regions and the outer regions. 1. A positive displacement device comprising:a first cylinder having a wall with an interior surface and an exterior surface;a vane slidably extending through the wall of the first cylinder, the vane having a first tip and a second tip;a second cylinder disposed within the first cylinder, the second cylinder having an exterior surface, the interior surface of the first cylinder and the exterior surface of the second cylinder defining an inner cavity therebetween, the vane moveable with respect to the second cylinder and in sealing contact between the interior surface of the first cylinder and the exterior surface of the second cylinder to divide the inner cavity into a first inner region and a second inner region, the first tip of the vane in contact with the exterior surface of the second cylinder;a third cylinder disposed around the first cylinder, the third cylinder having an interior surface, the exterior surface of the first cylinder and the interior surface of the third cylinder defining an outer cavity therebetween, the vane moveable with respect to the third cylinder ...

High pressure pumping system

One or more techniques and/or systems are disclosed for a pump technology that provides for more effective and efficient transfer of liquids, such as petroleum products and components, to and through pipelines. Such a technology can comprise a type of external gear pump that creates higher flow, resulting in higher pressures in the pipeline, to move the liquids, while providing for longer pump life, simpler and less maintenance, and fewer undesired conditions, with a smaller footprint, in a cost-effective system.

Gas Compressor and Method for Controlling Same

The purpose of the present invention is to provide a gas compressor that can achieve reduced fluctuation of discharge pressure during compressor body number control, and a method for controlling the gas compressor. This gas compressor includes a plurality of compressor units each having a compressor body, a motor for driving the compressor body, and an inverter for controlling a rotational speed of the motor, and a control device for controlling each of the inverters, in which discharge pipes of the compressor bodies are merged with one main discharge pipe and discharge pressure of the main discharge pipe is controlled through control of pressure of the respective discharge pipes by controlling, by means of the respective inverters, driving frequencies of the compressor bodies. The control device determines whether recovery through an increase in the driving frequency of the motor of each of the compressor bodies is possible, on the basis of the pressure value and a temporal changing amount of the discharge pressure of the main discharge pipe when the driving frequency of the motor of the compressor body is being increased but has not reached an upper limit frequency, and controls an increase of the number of the compressor bodies to be operated.

ECCENTRIC MOVABLE VANE PUMP

An eccentric movable vane pump includes a cylinder body, a first rotor, second rotors, and movable vanes of which the number is greater than or equal to 2. The first rotor is eccentrically disposed with the second rotors. One end of each of the movable vanes is rotatably connected to the first rotor, and the other ends of the movable vanes are rotatably connected to the second rotors. The first rotor is disposed on a main shaft. The cylinder body is provided with a fluid inlet and a fluid outlet respectively corresponding to an expansion area and a compression area of a space between adjacent movable vanes. The pump has a simple structure, high efficiency, low cost, multiple operation conditions, high stability, and a long service life, can operate in a high-speed/ultra-high speed range without being sealed by an elastic device, and has a small radial impact in operation. 112421242124214212142111616221. An eccentric movable vane pump , comprising: a cylinder body () , a first rotor () , second rotors () , and movable vanes () , wherein the first rotor () is eccentrically disposed with the second rotors (); one end of each of the movable vanes () is rotatably connected to the first rotor (); the second rotors () correspond one-to-one to the movable vanes () , and the number of the second rotors () and the number of the movable vanes () are greater than or equal to two; the other ends of the movable vanes () are rotatably connected to the second rotors (); the first rotor () is disposed on a main shaft (); and the cylinder body () is provided with a fluid inlet () and a fluid outlet () respectively corresponding to an expansion area and a compression area of a space between adjacent movable vanes ().242020201. The eccentric movable vane pump according to claim 1 , wherein the second rotors () are respectively provided with fixed vanes () claim 1 , and a volume of a space between adjacent fixed vanes () is periodically compressed and expanded claim 1 , such that the ...

PACKAGE-TYPE FLUID MACHINE

A package type fluid machine includes at least one intake port which is provided in a housing and communicates with an installation region of a plurality of fluid machine units; a plurality of exhaust paths which is provided inside the housing, and includes a first exhaust path which allows gas passed through the fluid machine of the plurality of fluid machine units to flow, and a second exhaust path different from the first exhaust path; and a single exhaust port which is provided in the housing, communicates with downstream end portions of the plurality of exhaust paths, and collects and discharges the gas flowed through the plurality of exhaust paths. 1. A package type fluid machine including a plurality of fluid machine units installed in a housing , the machine comprising:at least one intake port which is provided in the housing and communicates with an installation region of the plurality of fluid machine units to allow a cooling gas to flow therein;a plurality of exhaust paths which is provided inside the housing, and includes a first exhaust path which allows the gas passed through the fluid machine of the plurality of fluid machine units to flow, and a second exhaust path different from the first exhaust path; anda single exhaust port which is provided in the housing, communicates with downstream end portions of the plurality of exhaust paths, and collects and discharges the gas flowed through the plurality of exhaust paths.2. The package type fluid machine according to claim 1 , wherein the housing has a plurality of side plate portions and a single top plate portion claim 1 , and the exhaust port is provided in the top plate portion.3. The package type fluid machine according to claim 2 , further comprising:a first stacking unit and a second stacking unit in which the fluid machine units are stacked in each of a first installation region and a second installation region respectively, the first installation region and the second installation region being ...

Method for Controlling a Compressor Installation

A method for controlling a compressor system comprising a plurality of compressors, wherein the compressor system is intended to maintain a predefined excess pressure in a pressurized fluid system, wherein decisions are met at fixed or variable intervals as to switching operations for adapting the system to current conditions, wherein —in a pre-selecting step, switching alternatives are excluded from the plurality of combinatorially available switching alternatives, —in a main selecting step, remaining switching alternatives are weighed against one another while referring to one or more optimization criterion (criteria) and optimum switching alternatives are selected from among the given criteria, and —in a control step, the selected switching alternative is output for implementation in the compressor system. 1. A method for controlling a compressor system including a plurality of compressors , each compressor optionally having a different design or performance , the compressor system maintaining a predefined excess pressure in a pressurized fluid system despite a withdrawal of pressurized fluid from the pressurized fluid system , the method comprising the steps of:excluding one or more switching alternatives from a plurality of available switching alternatives based on current conditions of the pressurized fluid system,evaluating the plurality of switching alternatives other than the excluded switching alternatives based on an optimization criterion,selecting a switching alternative from the plurality of switching alternatives based on the evaluation, andoutputting the selected switching alternative to the compressor system,wherein selecting the switching alternative occurs at fixed or variable intervals.2. The method according to claim 1 , further comprising:increasing generation of the pressurized fluid upon reaching a switch-on pressure and reducing generation of compressed pressurized fluid upon reaching a switch-off pressure.3. A method for controlling a ...

AIR CONDITIONER AND COMPRESSOR

The present disclosure relates to an air conditioner and a compressor. The compressor includes: a first cylinder assembly, including a first cylinder body and a first sliding vane, a volume control assembly, including a pressure regulator; wherein the pressure regulator is provided with a storage cavity, and the storage cavity is communicated with the variable volume control cavity; wherein the first sliding vane is configured to slide in a reciprocating manner between the first compression cavity and the variable volume control cavity along the first sliding vane groove, to change the volume of the variable volume control cavity; and the refrigerant introduced into the variable volume control cavity flows between the variable volume control cavity and the storage cavity along with a change of the volume of the variable volume control cavity. 1. A compressor , comprising:a first cylinder assembly, comprising a first cylinder body and a first sliding vane, wherein the first cylinder body is provided with a first compression cavity, a variable volume control cavity and a first sliding vane groove, and the first sliding vane groove communicates the first compression cavity with the variable volume control cavity, the first sliding vane is slidably arranged in the first sliding vane groove, and a part of the first sliding vane being configured to extend into the first compression cavity, and another part of the first sliding vane being configured to extend into the inside of the variable volume control cavity; anda variable volume control assembly, comprising a pressure regulator; wherein the pressure regulator is provided with a storage cavity, the storage cavity being configured to accommodate refrigerant, and the storage cavity is communicated with the variable volume control cavity; andwherein the first sliding vane is so configured that when the first sliding vane slides along the first sliding vane groove the size of the another part extending into the variable ...

IMPROVEMENTS IN ROTARY CLAW PUMPS

A Rotary Claw Pump with at least one pair of intermeshing rotors has the same shape within a tolerance of ±3% of the radii from edges to rotational centers. A convex portion of the claws has a nominal uniform rate of radius change with angle of rotation. There may be multiple stages wherein the thickness of each successive rotor pair maintains profile but has a thickness within 20% of the thickness of the first stage rotor pair multiplied by the inverse products of the compression ratios of the preceding stages. A discharge port is at least partially uncovered at any position of rotation from where intermeshing claw rotor tips are closest to where they are most distant. The discharge port is at least partially connected with a region connected with the rotor tips of both claws during rotation. The discharge port limits pressure increase in the region. 1. A Rotary Claw Pump wherein at least one pair of intermeshing rotors has the same shape within a tolerance of plus or minus 3 percent of the radii from the edges of their shapes to their centers of rotation and wherein on a convex portion of the claws there is a nominal uniform rate of change of radius with angle of rotation.2. A Rotary Claw Pump as in where there are multiple stages wherein the thickness of each successive rotor pair does not vary in profile but has a thickness within 20% of the thickness of the first stage rotor pair multiplied by the inverse products of the compression ratios of the preceding stages.3. A Rotary Claw Pump wherein a discharge port is at least partially uncovered at any position of rotation from where a pair of intermeshing claw rotor tips are at their closest point of approach to where the said claw tips are at their furthest apart and wherein said discharge port is at least partially connected with a region connected with the rotor tips of both the said claws during said positions of rotation and the discharge port thereby at least limits pressure increase in the said region.4. A ...

Oldham coupling with enhanced key surface in a scroll compressor

An Oldham coupling structure for a scroll compressor decreases Oldham coupling pressure loading without increasing compressor diameter or significantly increasing orbiting scroll or Oldham coupling inertia. The Oldham coupling key height and area are increased by recessing the key face into the ring portion of the Oldham coupling, increasing the key height and adding pads to the involute side of the orbiting scroll base plate to extend the key slot, potentially resulting in reduced compressor diameter and/or reduced orbiting scroll and Oldham coupling inertia.

TWO-SHAFT ROTARY PUMP

Provided is a two-shaft rotary pump which is capable of improving reliability and operation efficiency by preventing an exhaust gas from flowing backward into a pump as much as possible, preventing the interior of the pump form being excessively compressed as much as possible, and suppressing temperature rise in the pump. A two-shaft rotary pump in which two rotating shafts () provided with rotors () are supported by bearings, such that the two rotors () are rotated in a noncontact manner with a small clearance kept therebetween and the two rotors () are rotated in a noncontact manner with a small clearance between an inner surface of a cylinder () and the two rotors, and a gas sucked into the cylinder () and compressed is discharged from the cylinder (), wherein an escape hole capable of letting a part of the compressed gas escape is provided in at least one of end wall portions () constituting both ends of the cylinder () and opened in the axial direction of the rotating shafts (). 115-. (canceled)16. A two-shaft rotary pump , in which two rotating shafts provided with rotors are supported by bearings , such that the two rotors are rotated in a noncontact manner with a small clearance kept therebetween and the two rotors are rotated in a noncontact manner with a small clearance between an inner surface of a cylinder and the two rotors , and a gas sucked into the cylinder and compressed is discharged from the cylinder ,wherein at least one escape hole capable of letting a part of the compressed gas escape is provided in at least one of end wall portions constituting both ends of the cylinder and opened in the axial direction of the rotating shafts, anda check valve, which opens when an inner pressure of the cylinder is higher than a prescribed pressure and closes when the inner pressure of the cylinder is lower than the prescribed pressure, is provided to the escape hole.17. The two-shaft rotary pump according to claim 16 , wherein the check valve is a reed valve. ...

Rotating cylinder type compressor

A rotating cylinder type compressor includes: a cylinder having a cylindrical shape and rotating about a central axis; a first rotor and a second rotor each having a cylindrical shape and rotating about an eccentric axis eccentric to the central axis of the cylinder; a shaft; a first vane; and a second vane. The first vane is slidably fitted to a first groove portion defined in the first rotor to define a first compression chamber. The second vane is slidably fitted to a second groove portion defined in the second rotor to define a second compression chamber. The first rotor and the second rotor are arranged in an extending direction of the central axis of the cylinder.

MULTI-CYLINDER ROTARY COMPRESSOR AND VAPOR COMPRESSION REFRIGERATION CYCLE SYSTEM INCLUDING THE MULTI-CYLINDER ROTARY COMPRESSOR

A multi-cylinder rotary compressor includes plural compression mechanism parts. A drawing force is applied to a vane of at least one of the compression mechanism parts radially outward with respect to a drive shaft, making a pressing force pressing the vane toward a piston smaller than in other compression mechanism parts. In a normal state, a pressing force due to a gas pressure difference between a suction pressure and a discharge pressure is larger than the drawing force, and a vane front end is pressed against a rotary piston peripheral wall. When the drawing force becomes greater than the pressing force, the vane front end is moved to separate from the rotary piston peripheral wall with a space through which oil is introduced from a sealed container, and a retention mechanism retains the vane separated from the piston, and the compression mechanism part switches to an uncompressed state. 1: A multi-cylinder rotary compressor comprising:a drive shaft including a plurality of eccentric-pin shaft portions;an electric motor configured to drive and rotate the drive shaft;a plurality of compression mechanisms; anda sealed container housing the electric motor and the plurality of compression mechanisms and storing lubricating oil at a bottom thereof, a cylinder having a cylinder chamber into which low-pressure refrigerant is sucked from a suction pressure space and from which compressed high-pressure refrigerant is discharged to a discharge pressure space,', 'a ring-shaped piston slidably attached to each of the plurality of eccentric-pin shaft portions of the drive shaft and configured to eccentrically rotate in the cylinder chamber,', 'a vane configured to separate the cylinder chamber into two spaces when a front end of the vane is pushed against an outer peripheral surface of the piston,', 'a vane groove housing the vane in such a manner that the vane reciprocates therein and being open to the cylinder chamber, and', 'a vane rear chamber housing a rear end of the ...

MULTI-STAGE PUMP ASSEMBLY HAVING A PRESSURE CONTROLLED VALVE FOR CONTROLLING RECIRCULATION OF FLUID FROM THE PUMP STAGE OUTLET TO THE PUMP STAGE INLET

The invention provides a pump comprising a pump inlet, a pump outlet, at least two threaded rotors and a pressure controlled valve, the pressure controlled valve being capable of controlling re-circulation of fluid from the pump outlet to the pump inlet. The pressure controlled valve can be a control valve. The invention also provides a multiple stage pump assembly comprising at least two pumps arranged in series, wherein at least one of the pumps is the aforementioned pump. 137.-. (canceled)38. A multiple stage pump assembly comprising at least two pumps arranged in series , wherein at least the second and each subsequent pump comprises a pump inlet , a pump outlet , at least two threaded rotors and a pressure controlled valve , the pressure controlled valve configured to control re-circulation of fluid from the pump outlet to the pump inlet.39. The assembly of claim 38 , wherein the pressure controlled valve is configured to control the rate of fluid flow there-through in proportion to the gas to liquid ratio of a fluid being pumped by the pump in use.40. The assembly of claim 38 , wherein the pressure controlled valve is a control valve.41. The assembly of claim 38 , further comprising a conduit connecting the pump outlet to the pump inlet claim 38 , wherein the conduit is configured to flowre-circulated fluid from the pump outlet to the pump inlet.42. The assembly of claim 41 , wherein the pressure controlled valve is located wholly or partly within the conduit or adjacent one or other end of the conduit.43. The assembly of claim 41 , further comprising a recess in the pump outlet configured to selectively flow liquid rather than gas from an enclosure in which the threaded rotors are located to the conduit.44. The assembly of claim 38 , wherein the pressure controlled valve is configured to respond to an absolute pressure difference between the pump outlet and the pump inlet such that the valve permits fluid to flow there-through when the absolute pressure ...

MULTIPLE COMPRESSOR CONFIGURATION WITH OIL-BALANCING SYSTEM

An oil balancing system for a multiple compressor system is provided. The oil balancing system includes an oil equalization line disposed between a first compressor and a second compressor. A first solenoid valve is provided in the oil equalization line. A first signal corresponds to a first oil level in the first compressor. A second signal corresponds to a second oil level in the second compressor. An oil balancing module uses the first signal and the second signal to diagnose an oil imbalance between the first compressor and the second compressor, and applies corrective action, whereby the corrective action includes sending control signals to operate at least one of the first compressor, the second compressor, or the first solenoid valve in a way that eliminates the oil imbalance. 1. An oil balancing system for a multiple compressor system , the oil balancing system comprising:a first compressor;a second compressor;an oil equalization line disposed between the first compressor and the second compressor;a first valve in the oil equalization line;an oil level detection system for generating a first signal corresponding to a first oil level in the first compressor and a second signal corresponding to a second oil level in the second compressor; andan oil balancing module that uses the first signal and the second signal to diagnose an oil imbalance between the first compressor and the second compressor, and applies corrective action, whereby the corrective action comprises sending control signals to change the operating speed of one of the first compressor and the second compressor, and operating the first valve in a way that eliminates or reduces the oil imbalance.2. The oil balancing system of claim 1 , wherein the oil balancing module further uses the first signal and the second signal to verify that the corrective action has eliminated or reduced the oil imbalance.3. The oil balancing system of claim 2 , wherein after the oil imbalance is eliminated claim 2 , the ...

ROTARY COMPRESSOR

In a rotary compressor, when it is assumed that a vane width is W, the amount of eccentricity of an eccentric portion is e, a vane leading end curvature radius is R, an annular piston radius is R, and a non-sliding region width on each of both side portions of a vane leading end is W, the vane width W and the vane leading end curvature radius Rare set such that the non-sliding region width Won each of both the side portions of the vane leading end defined by the following equation (A) is a value satisfying an equation (B): 1. A rotary compressor comprising:a vertically placed and sealed compressor housing including a discharge portion of a refrigerant on an upper portion and a suction portion of the refrigerant on a lower side surface;a compression unit arranged on a lower portion of the compressor housing and including an annular cylinder, an end plate that has a bearing portion and a discharge valve portion and closes one end portion of the cylinder, an end plate or an intermediate partition plate that has a bearing portion and closes the other end portion of the cylinder, an annular piston that is fitted into an eccentric portion of a rotating axis supported on the bearing portion, revolves in the cylinder along a cylinder inner wall of the cylinder, and forms an operation chamber between the annular piston and the cylinder inner wall, and a vane that projects into the operation chamber from a vane groove provided in the cylinder, abuts against the annular piston, and divides the operation chamber into a suction chamber and a compression chamber; anda motor that is arranged on an upper portion of the compressor housing and drives the compression unit through the rotating axis,the rotary compressor sucking the refrigerant through the suction portion and discharging the refrigerant after passing through the compressor housing from the discharge portion, wherein{'sub': v', 'ro', 't', 'v', 't, 'claim-text': [{'br': None, 'i': W', 'W/', 'e×R', 'R', '+R, 'sub': t', 'v ...

METHOD FOR OPERATING A VACUUM PUMP SYSTEM AND VACUUM PUMP SYSTEM APPLYING SUCH METHOD

A method of operating a vacuum pump system, the method including the steps of: operating a primary vacuum pump having a variable speed motor; connecting at least two secondary vacuum pumps in parallel with said primary vacuum pump; dividing the secondary vacuum pumps in groups, each group including at least one secondary vacuum pump; and assigning a priority for each of said groups. The method further includes the steps of measuring the inlet pressure p1, comparing the measured inlet pressure p1 with a predetermined pressure value p0, and if p1 is higher than p0, starting the secondary vacuum pump at a first predetermined startup load Sif it includes a fixed speed motor, and/or starting the secondary vacuum pump at a second predetermined startup load S, if it includes a variable speed moto 115-. (canceled)17. The method according to claim 16 , wherein the method is repeats the step of comparing the measured inlet pressure with the predetermined pressure value and if claim 16 , the subsequently measured inlet pressure is higher than the predetermined pressure value claim 16 , operating the at least one secondary vacuum pump part of the group having a next highest priority assigned to it claim 16 , until the pressure measured at the inlet reaches the value of the predetermined pressure value or until all the secondary vacuum pumps are running.18. The method according to claim 16 , wherein operating at least one secondary vacuum pump part of the group with the highest priority is done by starting one secondary vacuum pump at a time claim 16 , and if the measured inlet pressure is higher than the predetermined pressure value claim 16 , the vacuum pump system starts another secondary vacuum pump part of said same group with highest priority or claim 16 , if all the secondary vacuum pumps of said group with the highest priority are running claim 16 , the method further comprises the step of starting a secondary vacuum pump claim 16 , part of the group with the second ...

Enhanced-Thrust Lift and Propulsion Systems

A propulsion system includes a duct and a fluid flow generator. The duct has an elongated cavity with an inlet portion and an outlet portion. The fluid flow generator is disposed in the duct. The fluid flow generator configured to receive a fluid to generate an inlet stream through the inlet portion and generate an outlet stream through the outlet portion. The outlet stream is configured to generate thrust for a vehicle on which the fluid flow generator and the duct are mounted, and at least one of the inlet portion or the outlet portion is bent in a circular shape to alter a direction of a corresponding either one of the input stream or the output stream. 1. A propulsion system comprising:a duct comprising an elongated cavity with an inlet portion and an outlet portion; anda fluid flow generator disposed in the duct, the fluid flow generator configured to receive a fluid to generate an inlet stream through the inlet portion and generate an outlet stream through the outlet portion,wherein the outlet stream is configured to generate thrust for a vehicle on which the fluid flow generator and the duct are mounted; andwherein at least one of the inlet portion or the outlet portion is bent in a circular shape to alter a direction of a corresponding either one of the input stream or the output stream.2. The propulsion system of claim 1 , wherein the vehicle comprises at least one of a flying car or a motorcycle claim 1 , and wherein the fluid flow generator comprises a propeller claim 1 , the thrust generated by the outlet stream being configured to lift the at least one of the flying car or the motorcycle from the ground.3. The propulsion system of claim 1 , wherein at least a portion of the duct is selectively movable from a deployed position in which the outlet stream is to provide lift for the vehicle to a retracted position where the duct is stored.4. The propulsion system of claim 1 , wherein the duct comprises multiple nested vanes that direct the outlet stream ...

Compressor and air conditioner having same

Disclosed are a compressor and an air conditioner having same. The compressor includes: a first-stage cylinder, including a first-stage compression chamber; and a second-stage cylinder, including a second-stage compression chamber and a gas storage chamber. Refrigerant flowing out of the first-stage compression chamber flows through the storage chamber and enters into the second-stage compression chamber, and a flow area of the gas storage chamber is larger than an area of a gas outlet of the first-stage compression chamber. The compressor effectively solves problems that power consumption of the compressor is increased and performance is reduced due to large resistance loss in the cylinder of the compressor.

Apparatuses, Systems, and Methods for Improved Performance of a Pressurized System

A natural gas pumping system that includes a reciprocating compressor having at least two cylinders, a first conduit in fluid communication with an outlet of the first cylinder, a second conduit in fluid communication with an outlet of the second cylinder, and a junction in fluid communication with the first conduit and the second conduit.

HEAT PUMP APPARATUS

A heat pump apparatus, including: a two-cylinder compressor including: an electric motor; two compression units to be driven by the electric motor, the two-cylinder compressor being structured to switch between two operation modes including single operation in which one of the compression units is brought into a non-compression state, and parallel operation in which both the compression units are brought into a compression state; an inverter drive control device supplying drive power to the electric motor of the two-cylinder compressor; an operation mode detecting-determining unit determining a current operation mode based on an electric signal acquired from the inverter drive control device; and a capacity control device determining a rotating frequency of the electric motor so that a temperature of a target object is brought close to a set value, to thereby control the inverter drive control device based on a result of determination of the operation mode detecting-determining unit. 1. A heat pump apparatus , comprising: an electric motor, and', 'two compression units to be driven by the electric motor,', 'the two-cylinder compressor being structured to switch between two operation modes including a single operation in which one of the two compression units is brought into a non-compression state, and a parallel operation in which both the two compression units are brought into a compression state in accordance with operation conditions,, 'a two-cylinder compressor including'}a heat-rejecting-side heat exchanger;a pressure reducing mechanism; 'the two-cylinder compressor, the heat-rejecting-side heat exchanger, the pressure reducing mechanism, and the heat-removing-side heat exchanger being connected to one another;', 'a heat-removing-side heat exchanger,'}an inverter drive control device configured to supply drive power to the electric motor of the two-cylinder compressor;an operation mode detecting-determining unit configured to determine either one of the two ...

FLUID MACHINE

A fluid machine includes a main body, two first screw rotors, two second screw rotors, a driving module, a first slide member and a second slide member. The two first screw rotors are meshingly engaged with each other. The two second screw rotors are meshingly engaged with each other. Two first screw rotors are arranged in the first chamber of the main body. Two second screw rotors are arranged in the second chamber of the main body. The driving module is arranged in the drive chamber of the main body. The first slide member can move relative to the two first screw rotors. The second slide member can move relative to the two second screw rotors. A fluid entering the main body exits after being compressed or expanded by the two first screw rotors and the two second screw rotors. 1. A fluid machine , comprising:a main body internally separated into a first chamber, a second chamber, a drive chamber, a first auxiliary chamber, and a second auxiliary chamber, wherein the first chamber, the second chamber, and the drive chamber are in spatial communication with each other, the first auxiliary chamber is in spatial communication with the first chamber, and the second auxiliary chamber is in spatial communication with the second chamber;wherein the main body includes a first port and a second port, and wherein the first port is in spatial communication with the first chamber and the second port is in spatial communication with the second chamber;two first screw rotors arranged in the first chamber and meshingly engaged with each other, wherein an end of each of the two first screw rotors is adjacent to the first port;two second screw rotors arranged in the second chamber and meshingly engaged with each other, wherein an end of each of the two second screw rotors is adjacent to the second port;a driving module arranged in the drive chamber, connected to one of the two first screw rotors, and connected to one of the two second screw rotors, wherein the driving module is ...

Oscillating piston-type compressor

An oscillating piston compressor includes two oscillating compression units, and an introduction section configured to introduce an intermediate-pressure refrigerant into a compression chamber of each of the compression units. Each compression unit has a cylinder forming a cylinder chamber, a piston housed in the cylinder chamber, and a blade integrally formed with the piston. The piston rotates in the cylinder chamber while the blade oscillates. The two compression units are configured such that phases of the pistons are opposite to each other. The piston has a non-circular outer peripheral surface, and the cylinder chamber has an inner peripheral surface with a shape determined based on an envelope of the outer peripheral surface of the piston in rotation.

COMPRESSION REFRIGERATION MACHINE HAVING A SPINDLE COMPRESSOR

The invention relates to a spindle compressor without operating fluid in the working space with a 2-tooth spindle rotor and a 3-tooth spindle rotor in a surrounding compressor housing-and preferably non-parallel rotation axes of the two spindle rotors, in particular for use in compression refrigeration machines. In order to improve the degree of efficiency while providing flexible power adjustment, it is proposed according to the invention that a multi-stage spindle compressor be used as a refrigerant compressor, whose compressor housing and whose spindle rotors are cooled via a partial-flow branch-off of liquid refrigerant from the refrigerant main flow circuit, wherein the compressor housing is cooled in a controlled manner by means of refrigerant evaporation, with the refrigerant vapor being subsequently fed to the inlet, and that, for power adjustment, there are also post-inlet feeds into the working space in addition to the inlet feed, and also pre-outlet discharges in addition to the outlet discharge from the outlet space, each with their own regulating device. 111-. (canceled)12. A compression refrigeration machine comprising a refrigerant main flow circuit , refrigerant located in the refrigerant main flow circuit , and a spindle compressor for conveying and compressing gaseous delivery media , the spindle compressor having a working space and being configured as a 2-shaft rotation compressor machine which operates without operating fluid in the working space and having a 2-tooth spindle rotor , a 3-tooth spindle rotor and a compressor housing which surrounds the spindle rotors and has an inlet space and an outlet collecting space ,wherein the spindle compressor is a multi-stage spindle compressor, the refrigerant main flow circuit has a partial-flow branch-off, and the compressor housing and the spindle rotors are cooled via the partial-flow branch-off with liquid refrigerant from the refrigerant main flow circuit.13. The compression refrigeration machine ...

Apparatuses, Systems, and Methods for Improved Performance of a Pressurized System

A natural gas pumping system that includes six reciprocating compressor cylinders, the reciprocating pistons of the six compressors having cycles offset by 60 degrees one from another.

COMPRESSOR AND AIR CONDITIONING SYSTEM

A compressor and an air conditioning system. The compressor includes two compressing structures and an intermediate gas supplement structure. A communication pipe is provided between a gas exhaustion port of one compressing structure and a gas suction port of another compressing structure in the two compressing structures. The intermediate gas supplement structure is in communication with the communication pipe. At least one compressing structure is provided with a gas supplement structure. In the compressor and the air conditioning system, the gas supplement structure is provided to at least one compressing structure, so that at least two levels of gas supplement to the compressor are provided.

Coating equipment for composite membrane without diffusion pump and its thickness gauge for both thick and thin coatings

A coating equipment for composite membrane without diffusion pump and its thickness gauge for both thick and thin coatings comprises a coating equipment for composite membrane without diffusion pump and a thickness gauge for both thick and thin coatings. A vacuum pump system of the coating equipment for composite membrane without diffusion pump is a roots-type pump system. Compared to conventional diffusion pumps, roots-type pump have advantages of low energy consumption, stable performance, good vacuum-pumping effect, short starting time, etc.

TWIN SHAFT PUMPS AND A METHOD OF PUMPING

A twin shaft pump may include two cooperating rotors configured to rotate in opposite directions about parallel axes of rotation; a stator comprising a stator bore in which the rotors are mounted to rotate. The stator bore includes a central part between the two axes of rotation, and an outer part outside of the two axes, the rotors being configured to have cooperating dimensions with the stator bore such that an outer edge of each rotor that is remote from the other rotor seals with the stator bore when rotating in at least a portion of the outer part. A fluid inlet is provided in the stator bore, at least a portion of the fluid inlet being in the central part of the stator bore between the axes of rotation. A fluid outlet is provide in an opposing surface of the stator bore, the fluid outlet being in the central part of the stator bore. The fluid inlet and fluid outlet are arranged such that on rotation of the rotors, the rotors each move a pumping chamber between the fluid inlet and the fluid outlet; wherein at least a portion of the fluid inlet is arranged to extend beyond the central part of the stator bore. 1. A twin shaft pump comprisingtwo cooperating rotors configured to rotate in opposite directions about parallel axes of rotation;a stator comprising a stator bore in which the two cooperating rotors are mounted to rotate;the stator bore comprising a central part between the parallel axes of rotation, and an outer part outside of the parallel axes, the two cooperating rotors being configured to have cooperating dimensions with the stator bore such that an outer edge of each rotor that is remote from the other rotor seals with the stator bore when rotating in at least a portion of the outer part;a fluid inlet in the stator bore, at least a portion of the fluid inlet being in the central part of the stator bore between the parallel axes of rotation;a fluid outlet in an opposing surface of the stator bore, the fluid outlet being in the central part of the ...

Compressor system and compressor

A unique compressor system may include a compressor having a compressor housing. The compressor housing may include an oil drainage passage formed therein. The passage may be configured to drain oil from bearings and other oil-lubricated components of the compressor. The compressor may be coupled to a gearbox or an oil tank. The gearbox or oil tank may include a passage that is in fluid communication with the oil drainage passage. The gearbox or oil tank passage may be operative to receive the drained oil and to direct the drained oil to an oil tank.

CONTROLLER FOR COMPRESSOR

The present invention is directed to a controller for a compressor, more specifically for a first electrical VSD motor configured to drive a compressor element, said controller comprising a housing in which is provided a rectifier, a DC link with a DC bus and two inverters connected to the same DC bus, a first inverter configured to control the first VSD motor driving said compressor element, and a second inverter configured to control a second VSD motor driving a fan configured to cool the compressor. 112.-. (canceled)13. A compressor comprising a controller connected to a first VSD motor for driving a compressor element of said compressor wherein the controller is further connected to a second VSD motor for driving a cooling fan configured to cool said compressor , said controller comprising a housing in which is provided a rectifier , a DC link with a DC bus and two inverters connected to the same DC bus , a first inverter configured to control the first VSD motor driving said compressor element , and a second inverter configured to control the second VSD motor driving the fan.14. The compressor according to claim 13 , wherein said compressor does not have a relay cabinet.15. The compressor according to claim 13 , wherein each of said inverters comprises at least one IGBT which is connected to said DC bus.16. The compressor according to claim 13 , wherein the controller further comprises a separate cooling fan for cooling said the power electronics of said controller.17. The compressor according to claim 13 , wherein the controller further comprises a first current sensor for sensing the current going through a winding of the first VSD motor.18. The compressor according to claim 13 , wherein the controller further comprises a voltage sensor for sensing the value of the voltage at the level of the first VSD motor and/or of the second VSD motor.19. The compressor according to claim 13 , wherein the controller further comprises a communication module adapted to ...

Two-stage oil-injected screw air compressor

A two-stage oil-injected screw air compressor includes an integrated compression casing, and the integrated compression casing further includes a first stage compression chamber, an intermediate cooling channel, and a second stage compression chamber parallel stacked in the integrated compression casing. A straightforward oil injector aims at the intermediate cooling channel to spray lubricating oil into the intermediate cooling channel.

Method of Pumping in a System of Vacuum Pumps and System of Vacuum Pumps

The present invention relates to a pumping method in a pumping system (SP, SPP) comprising: a main lubricated rotary vane vacuum pump () with a gas inlet port () connected to a vacuum chamber () and a gas outlet port () leading into a conduit () before coming out into the gas outlet () of the pumping system (SP, SPP), a non-return valve () positioned in the conduit () between the gas outlet port () and the gas outlet (), and an auxiliary lubricated rotary vane vacuum pump () connected in parallel to the non-return valve (). According to this method, the main lubricated rotary vane vacuum pump () is activated in order to pump the gases contained in the vacuum chamber () through the gas outlet port (), simultaneously the auxiliary lubricated rotary vane vacuum pump () is activated and continues to operate all the while that the main lubricated rotary vane vacuum pump () pumps the gases contained in the vacuum chamber () and/or all the while that the main lubricated rotary vane vacuum pump () maintains a defined pressure in the vacuum chamber (). The present invention also relates to a pumping system (SP, SPP) able to be used to implement this method. 1. Pumping method in a system of vacuum pumps comprising:a main lubricated rotary vane vacuum pump with a gas inlet port connected to a vacuum chamber and a gas outlet port leading into a conduit before coming out into the gas outlet of the system of vacuum pumps,a non-return valve positioned in the conduit between the gas outlet port and the gas outlet, andan auxiliary lubricated rotary vane vacuum pump connected in parallel to the non-return valve,the method being characterized in thatthe main lubricated rotary vane vacuum pump is activated in order to pump the gases contained in the vacuum chamber through the gas outlet port;simultaneously the auxiliary lubricated rotary vane vacuum pump is activated; andthe auxiliary lubricated rotary vane vacuum pump continues to operate all the while that the main lubricated rotary ...

Dual-Stage Compressor, Control Method Thereof and Air Conditioning Unit

The present disclosure relates to a dual-stage compressor, a control method thereof, and an air conditioning unit. The dual-stage compressor includes a low-pressure stage; a high-pressure stage connected in series with the low-pressure stage; and a volume ratio adjustment mechanism arranged at the high-pressure stage and configured to adjust the volume ratio of refrigerant compression at the high-pressure stage. When the final compression pressure of the compressor is lower or greater than the exhaust pressure, the volume ratio adjustment mechanism is operated to increase or reduce the volume ratio of refrigerant compression at the high-pressure stage so that the final compression pressure of the compressor is equal to the exhaust pressure, and overcompression and undercompression are improved to adapt to changes in external conditions, increase the energy efficiency of the compressor, and reduce the noise of the compressor. 1. A dual-stage compressor , comprising:a low-pressure stage;a high-pressure stage connected in series with the low-pressure stage; anda volume ratio adjustment mechanism arranged at the high-pressure stage and configured to adjust the volume ratio of refrigerant compression at the high-pressure stage.2. The dual-stage compressor according to claim 1 , wherein the compressor is a screw compressor claim 1 , and the volume ratio adjustment mechanism comprises a first slide valve adjustment mechanism configured to adjust an output position of an exhaust port at the high-pressure stage.3. The dual-stage compressor according to claim 1 , further comprising a capacity adjustment mechanism arranged at the low-pressure stage and configured to adjust an output capacity of refrigerant compression at the low-pressure stage.4. The dual-stage compressor according to claim 3 , wherein the capacity adjustment mechanism comprises a second slide valve adjustment mechanism configured to adjust the output capacity of a bypass port at the low-pressure stage.5. The ...

Fluid Ring Compressor

A fluid ring compressor comprises a first single-acting compression stage having a first impeller eccentrically mounted in a housing and a second single-acting compression stage having a second impeller eccentrically mounted in a housing. The first compression stage and the second compression stage are separated from one another by a sealing gap. The sealing gap is arranged between a suction section of the first compression stage and a suction section of the second compression stage. 1. A fluid ring compressor having a first single-acting compression stage , which has a first impeller eccentrically mounted in a housing , and a second single-acting compression stage , which has a second impeller eccentrically mounted in a housing , wherein the first compression stage and the second compression stage are separated from one another by a sealing gap , characterized in that the sealing gap is arranged between a suction segment of the first compression stage and a suction segment of the second compression stage.2. The fluid ring compressor as claimed in claim 1 , characterized in that the first compression stage has a first control disk claim 1 , in that the second compression stage has a second control disk claim 1 , wherein the first impeller and the second impeller are arranged between the first control disk and the second control disk.3. The fluid ring compressor as claimed in claim 1 , wherein the first impeller has chambers and the second impeller has chambers characterized in that a wall claim 1 , which rotates with the impellers claim 1 , is formed between the chambers of the first impeller and the chambers of the second impeller.4. The fluid ring compressor as claimed in claim 3 , characterized in that the sealing gap is arranged between a circumferential surface of the wall and an end surface of the housing.5. The fluid ring compressor as claimed in claim 1 , characterized in that the housing has a duct claim 1 , which extends from an outlet side of the first ...

Rotary systems lubricated by fluid being processed

Rotary systems are described, which can include at least one of compressors and vacuum pumps. Each rotary system includes a corresponding piston that rotates in an orbital motion around a respective eccentric of a shaft in order to either compress fluid or function as a vacuum pump. Multiple rotary systems can be executed on parallel on a single shaft such that these rotary systems are powered by a single motor. Various components of the rotary systems are coated with an abradable coating, which minimizes friction when these components come in contact with each other. The minimized friction minimizes the wear and tear of these components. Each rotary system can be lubricated by only the fluid being processed (for example, compressed or vacuumed) by that rotary system. The use of the fluid being processed for lubrication and the abradable coatings eliminate a need for another lubricant for lubricating the rotary system.

ROTARY COMPRESSOR

In a rotary compressor, a refrigerant path hole communicates with a lower discharge chamber concave portion while at least a part thereof overlaps the lower discharge chamber concave portion, is positioned between a lower vane groove and a first insertion hole in a lower cylinder, and is configured of a plurality of holes which are disposed between the upper vane groove and the first insertion hole in the upper cylinder, and a sectional area of a cross section which is closest to the lower vane groove and the upper vane groove of the plurality of holes is the smallest compared to the sectional area of the cross section of the other holes. 1. A rotary compressor which includes a sealed vertically-placed cylindrical compressor housing which is provided with a discharge pipe that discharges a refrigerant in an upper portion thereof , which is provided with an upper inlet pipe and a lower inlet pipe that suction the refrigerant in a lower portion of a side surface thereof , an accumulator which is connected to the upper inlet pipe and the lower inlet pipe that are fixed to a side portion of the compressor housing , a motor which is disposed in the compressor housing , and a compressing unit which is disposed below the motor in the compressor housing , is driven by the motor , suctions and compresses the refrigerant from the accumulator via the upper inlet pipe and the lower inlet pipe , and discharges the refrigerant from the discharge pipe , and in which the compressing unit includes an annular upper cylinder and an annular lower cylinder , an upper end plate which blocks an upper side of the upper cylinder and a lower end plate which blocks a lower side of the lower cylinder , an intermediate partition plate which is disposed between the upper cylinder and the lower cylinder and blocks the lower side of the upper cylinder and the upper side of the lower cylinder , a rotation shaft which is supported by a main bearing unit provided on the upper end plate and a sub- ...

SCROLL COMPRESSOR

A scroll compressor includes a fixed scroll and an orbiting scroll, which are made of materials having different strengths and which include respective scroll laps. The scroll lap of the fixed scroll and the orbiting scroll having a lower material strength has a thickness satisfying tl=2aα, where tl represents scroll lap thickness, a represents basic circle radius, and α represents phase angle. The scroll lap of the fixed scroll and the orbiting scroll having a higher material strength has a thickness satisfying th=2aβ, where th represents scroll lap thickness, a represents basic circle radius, and β represents phase angle. The scroll lap thickness th of the fixed scroll and the orbiting scroll having the higher material strength is set to be less than the scroll lap thickness tl of the fixed scroll and the orbiting scroll having the lower material strength. 211. The scroll compressor of claim 1 , wherein when σ represents stress generated at a base of the scroll lap of the one of the fixed scroll and the orbiting scroll having the lower material strength claim 1 , and σh represents stress generated at a base of the scroll lap of the one of the fixed scroll and the orbiting scroll having the higher material strength claim 1 , the fixed scroll and the orbiting scroll have respective scroll lap thicknesses adjusted to make a ratio between the stress σ and the stress σh equal to or less than a ratio between the lower material strength and the higher material strength.3. The scroll compressor of claim 1 , wherein the material of the orbiting scroll is an aluminum alloy claim 1 , and the material of the fixed scroll is a cast-iron-based material.4. The scroll compressor of claim 1 , wherein the scroll lap thickness th of the one of the fixed scroll and the orbiting scroll having the higher material strength is equal to or less than 0.8 times the scroll lap thickness tl of the one of the fixed scroll and the orbiting scroll having the lower material strength. The present ...

Modularized Integrated Non-Coaxial Multiple Chamber Dry Vacuum Pump

A modularized integrated non-coaxial multiple chamber dry vacuum pump is formed by at least two modularized vacuum chambers that can be integrated into a solid multiple stage dry vacuum pump. These chambers are connected in serial to allow gas to pass through and be discharged directly to the atmosphere. Each chamber contains a pair of lobes of its own and at least one chamber does not share at least one coaxial axle with another chamber. At least two chambers do not share all co-axial(s) and can have their own power drive at different RPMs from either different motors or transmissions. 1. An integrated modularized multiple-chamber vacuum pump , comprising:at least two non-coaxial vacuum chambers;one or more motor(s);an outlet;an inlet;at least two axles;wherein each vacuum chamber has a pair of lobes;wherein all of the chambers are integrated into one solid piece;wherein each chamber has an inlet and an outlet; andwherein gas flows into the inlet on one of the chambers, through the pump and out of the outlet on one of the chambers.2. The vacuum pump of claim 1 , wherein a first vacuum chamber is a first stage in an arrangement of independent vacuum chambers claim 1 , a second vacuum chamber is a second stage claim 1 , and each respective vacuum chamber in the arrangement is a stage.3. The vacuum pump of claim 2 , wherein the pump comprises four stages claim 2 , wherein stages one and three share a first motor and stages two and four share a second motor with a lower RPM than the first motor and in a different direction than the first motor; and an air flow is suctioned from stage one claim 2 , to stage two claim 2 , to stage three claim 2 , and to stage four.4. The vacuum pump of claim 2 , wherein the pump comprises four stages claim 2 , wherein stages one and three share a first motor and stages two and four share a second motor; stages two and four are smaller than stages one and three; and an air flow is suctioned from stage one claim 2 , to stage two claim 2 , ...

System Including High-Side and Low-Side Compressors

A heat pump system may be operable to circulate fluid between first and second heat exchangers in a first direction in a heating mode and in a second direction in a cooling mode. The heat pump system may include a suction conduit, a low-side compressor and a high-side compressor. The low-side and high-side compressors may both be in fluid communication with the suction conduit.

PUMP UNIT

A pump unit includes a rough-vacuum pump and a Roots vacuum pump connected in series and upstream of the rough-vacuum pump in the direction of flow of the pumped gases. The Roots vacuum pump has three pumping stages in which the rotors are designed to be driven simultaneously in rotation by a motor of the Roots vacuum pump. A ratio of the flow rate generated by the first pumping stage of the rough-vacuum pump in the direction of flow of the pumped gases over the flow rate generated by the last pumping stage of the rough-vacuum pump is less than or equal to four. 112-. (canceled)13. A pump unit comprising:a rough-vacuum pump; anda Roots vacuum pump connected in series with and upstream of the rough-vacuum pump in a direction of flow of pumped gases,wherein the Roots vacuum pump has three pumping stages in which the rotors are configured to be driven simultaneously in rotation by a motor of the Roots vacuum pump, andwherein a ratio of a flow rate generated by a first pumping stage of the rough-vacuum pump in the direction of flow of the pumped gases over a flow rate generated by a last pumping stage of the rough-vacuum pump is less than or equal to four.14. The pump unit according to claim 13 , wherein said ratio is less than or equal to three.15. The pump unit according to claim 13 , wherein the rough-vacuum pump has three to five pumping stages in which the rotors are configured to be driven simultaneously in rotation by a motor of the rough-vacuum pump.16. The pump unit according to claim 13 , wherein the flow rate generated by the first pumping stage of the rough-vacuum pump is less than or equal to 500 m/h.17. The pump unit according to claim 13 , wherein the flow rate generated by the first pumping stage of the rough-vacuum pump is between 200 m/h and 300 m/h.18. The pump unit according to claim 13 , wherein the flow rate generated by a first pumping stage of the Roots vacuum pump is ten times greater than the flow rate generated by the first pumping stage of ...

Pressure Changing Device

Pressure changing devices and methods of making and using the same are disclosed. One pressure changing device includes an elliptic cylinder and a piston that has an external surface with a trochoid cross-section. Another pressure changing device includes a piston and a rotating cylinder that has an internal surface with a trochoid cross-section. Another pressure changing device includes two fixed axes, one for rotation of one component and another for orbiting or oscillation of the other component. The devices and methods include stacked pressure changing devices with one or more common shafts. The pressure changing device may be easier and less expensive to manufacture and repair than prior pressure changing devices of the same or similar functionality, and can provide efficient gap sealing in a high-pressure expansion part of a compression or expansion cycle. 1. A pressure changing device comprising (i) a helical or screw-type cylinder with an internal surface with a cross-section that is an ellipse and (ii) a helical or screw-type piston with an external surface with a cross-section that is an inner loop limaçon , wherein said piston defines at least one pressure changing space in said cylinder.2. The pressure changing device of claim 1 , wherein said cylinder is fixed claim 1 , said piston rotates around a first axis claim 1 , and said first axis orbits around a second fixed axis.3. The pressure changing device of claim 1 , wherein said cylinder rotates around a first fixed axis claim 1 , and said first axis orbits around a second fixed axis claim 1 , and said piston is fixed.4. The pressure changing device of claim 1 , wherein said cylinder rotates around a first fixed axis claim 1 , and said piston rotates around a second fixed axis.5. The pressure changing device of claim 1 , wherein said piston rotates around a first fixed axis claim 1 , and said cylinder orbits around a second fixed axis without rotation.6. The pressure changing device of claim 1 , wherein ...

ROTARY COMPRESSOR HAVING TWO CYLINDERS

A rotary compressor having two cylinders includes crankshaft having first eccentric portion and second eccentric portion connected to each other by connecting portion. The rotary compressor further includes two compressive elements that compress working fluid in cylinder as first piston inserted over first eccentric portion eccentrically rotates in accordance with rotation of crankshaft. Further, first piston inserted over first eccentric portion undergoes assembly by being inserted over first eccentric portion through second eccentric portion. Further, a releasing portion is provided at each of outer diameter portions of first eccentric portion and second eccentric portion. 1. A rotary compressor having two cylinders , comprising:a crankshaft having a first eccentric portion and a second eccentric portion connected to each other by a connecting portion; andtwo compressive elements that compress working fluid in a cylinder as a first piston inserted over the first eccentric portion eccentrically rotates in accordance with rotation of the crankshaft,wherein the first piston inserted over the first eccentric portion undergoes assembly by being inserted over the first eccentric portion through the second eccentric portion,a releasing portion is provided at each of outer diameter portions of the first eccentric portion and the second eccentric portion on the connecting portion side,Hc-c Подробнее

ROTARY COMPRESSOR AND REFRIGERATION CYCLE APPARATUS

According to one embodiment, a rotary compressor includes a compression mechanism unit. When H is the length of a middle shaft part, Hp is the length of a bearing hole, Dp is the inner diameter of the bearing hole, Dc is the outer diameter of a crank part, Dm is the outer diameter of the middle journal part, C is the axial length of a first chamfered part provided to a middle shaft part-side end edge of the crank part, C is the axial length of a second chamfered part, C is the axial length of a third chamfered part, and C is the axial length. of a fourth chamfered part, Dp is larger than Dc and Dm, and the relationships of [Equation 1] H≤Hp, [Equation 2] H>Hp−CC√{square root over ((Dp−Dc))}, and [Equation 2] H>Hp−CC√{square root over ((Dp−Dm))} are all satisfied. 2. The rotary compressor of claim 1 , further comprising:a spacer interposed between the partition plate and the cylinder body corresponding to the other crank portion adjacent to the second bearing,whereinthe intermediate shaft portion of the rotating shaft penetrates the spacer.3. The rotary compressor of claim 1 , whereinthe rotating shaft is an integrated structure in which the first journal portion, the second journal portion, the intermediate journal portion, the plurality of crank portions, and the intermediate shaft portion are formed integrally, andan outer diameter of the other crank portion adjacent to the second bearing is smaller than an outer diameter of the one of the crank portions.4. The rotary compressor of claim 2 , whereina suction port to which the working fluid is guided, and two branch passages branched from the suction port toward the cylinder chambers corresponding to the two cylinder bodies opposed with the partition plate disposed therebetween, are formed inside the partition plate including the bearing hole.5. The rotary compressor of claim 4 , whereinthe partition plate including the bearing hole includes a relief recess portion continuous with the bearing hole, andthe relief ...

COMPRESSOR WITH A CLOSED LOOP WATER COOLING SYSTEM

The present disclosure provides a compressor system having at least one fluid compressor for compressing a working fluid. A lubrication supply system is operable for supplying lubrication fluid to the compressor. A closed loop cooling system using R718 refrigerant is provided to cool the working fluid. The closed loop cooling system includes a refrigerant compressor for compressing the refrigerant, a condenser operable for receiving compressed refrigerant gas and removing heat to form liquid refrigerant, and an expansion device for expanding and cooling the liquid refrigerant into a cooled gaseous refrigerant. 1. A compressor system comprising:at least one fluid compressor for compressing a working fluid;a lubrication supply system operable for supplying lubrication fluid to the compressor; a refrigerant compressor for compressing a refrigerant;', 'a condenser operable for receiving compressed refrigerant gas and removing heat to form a liquid refrigerant;', 'an expansion device for expanding and cooling the liquid refrigerant into a cooled gaseous refrigerant;', 'a heat exchanger in fluid communication with the refrigerant; and', 'wherein the refrigerant is R718 (water)., 'a closed loop cooling system comprising2. The compressor system of claim 1 , wherein the closed loop cooling system is defined by a hermetically sealed refrigerant flowpath such that R718 refrigerant is not removed or replaced in the flowpath during system operation.3. The compressor system of claim 1 , wherein the heat exchanger is in fluid communication with lubrication fluid.4. The compressor system of claim 1 , wherein the heat exchanger is in fluid communication with the working fluid.5. The compressor system of further comprising:a plurality of heat exchangers in fluid communication with the refrigerant.6. The compressor system of further comprising:at least one bypass conduit for bypassing at least one of the plurality of heat exchangers.7. The compressor system of further comprising:at ...

Apparatuses, Systems, and Methods for Improved Performance of a Pressurized System

A natural gas pumping system that includes a reciprocating compressor having at least two cylinders, a first conduit in fluid communication with an outlet of the first cylinder, a second conduit in fluid communication with an outlet of the second cylinder, and a junction in fluid communication with the first conduit and the second conduit. 1. A natural gas pumping system , comprising: [ an inlet through which natural gas is received; and', 'an outlet through which natural gas is discharged;, 'a first cylinder having, an inlet through which natural gas is received; and', 'an outlet through which natural gas is discharged;, 'a second cylinder having], 'a reciprocating compressor includinga first conduit having a first end in fluid communication with the outlet of the first cylinder and a second end in fluid communication with a junction; anda second conduit having a first end in fluid communication with the outlet of the second cylinder and a second end in fluid communication with the junction,wherein the first conduit has a first cross-sectional area, the second conduit has a second cross-sectional area, and the junction has an outlet having a third cross-sectional area less than or equal to approximately two times the first cross-sectional area and the second cross-sectional area combined.2. The natural gas pumping system of claim 1 , wherein:a length of the first conduit is such that pulses coming from the first cylinder reflect back from the junction to the outlet of the first cylinder at a time when the first cylinder is near a minimum volume end of its stroke; anda length of the second conduit is such that pulses coming from the second cylinder reflect back from the junction to the outlet of the second cylinder at a time when the second cylinder is near a minimum volume end of its stroke.3. The natural gas pumping system of claim 1 , wherein:the length of the first conduit is such that pulses coming from the first cylinder reflect back from the junction to the ...

MULTISTAGE COMPRESSOR SYSTEM WITH INTERCOOLER

A multistage compressor system with intercooler can include a sealed housing with first and second compressor stages, where the first compressor stage is for receiving refrigerant from outside of the sealed housing, and the second compressor stage is for receiving refrigerant from within the sealed housing. The compressor system can also include a crank for mechanically driving the first compressor stage and/or the second compressor stage, and a heat exchanger outside of the sealed housing for receiving refrigerant from the first compressor stage and exchanging heat with the refrigerant. The compressor system can further include an oil reservoir contained by the sealed housing, where the oil reservoir includes oil for lubricating the crank, receives the refrigerant from the heat exchanger, and exchanges heat with the refrigerant to cool the oil in the oil reservoir, and where the refrigerant can be supplied to the second compressor stage. 1. A multistage compressor system with intercooler comprising:a sealed housing;a first compressor stage contained by the sealed housing, the first compressor stage for receiving refrigerant from outside of the sealed housing and compressing the refrigerant;a second compressor stage contained by the sealed housing, the second compressor stage for receiving refrigerant from within the sealed housing and compressing the refrigerant;a concentric vane compression device including the first compressor stage and the second compressor stage;a crank for mechanically driving both the first compressor stage and the second compressor stage;a heat exchanger outside of the sealed housing, the heat exchanger for receiving refrigerant from the first compressor stage and exchanging heat with the refrigerant; andan oil reservoir contained by the sealed housing, the oil reservoir including oil for lubricating the crank, the oil reservoir for receiving the refrigerant from the heat exchanger and exchanging heat with the refrigerant to cool the oil in ...

Method for monitoring an operating state of a pumping device

A method is for surveillance of an operating state of a pumping device connected to a process chamber in order to determine a failing operating state of the pumping device. The pumping device includes at least one rough-vacuum pump including a motor for driving the rough-vacuum pump and a variable speed drive to control the rotation speed of the motor, to receive a first input parameter corresponding to a set point frequency and a second input parameter corresponding to a motor current, and to deliver to the motor an output parameter corresponding to a control frequency. A failing operating state is determined when in steady-state operation the difference between the first input parameter and the output parameter is equal to or exceeds 10% of the first input parameter for a predetermined time greater than 3 seconds. The method can be implemented in a pumping device and an installation.

DOUBLE-ENDED SCROLL COMPRESSOR LUBRICATION OF ONE ORBITING SCROLL BEARING VIA CRANKSHAFT OIL GALLERY FROM ANOTHER ORBITING SCROLL BEARING

A scroll compressor orbiting scroll bearing lubrication system includes a scroll compressor crankshaft having a lubricating fluid gallery extending therethrough between a first stage orbiting scroll and a second stage orbiting scroll. The first stage employs an orbiting scroll radial bearing and an orbiting scroll hydrodynamic thrust bearing, while the second stage employs an orbiting scroll radial bearing and an orbiting scroll hydrostatic thrust bearing. Lubricating fluid is supplied to the second stage orbiting scroll radial bearing via the lubricating fluid gallery. 1. A scroll compressor orbiting scroll bearing lubrication system , comprising:a lubricating fluid sump storing a lubricating fluid pressurized higher than the scroll compressor suction pressure; a first eccentric drive pin extending from a first end of the crankshaft, wherein the first drive pin is rotatably disposed at least partially within a first radial orbital bearing and configured to engage a first orbiting scroll comprising a baseplate and a spiral wrap element extending from the baseplate, and further comprising one or more oil passages in the baseplate;', 'a second eccentric drive pin extending from a second end of the crankshaft, wherein the second drive pin is rotatably disposed at least partially within a second radial orbital bearing and configured to engage a second orbiting scroll;, 'a compressor crankshaft comprisingan orbiting scroll hydrodynamic thrust bearing associated with the first orbiting scroll,wherein the first radial orbital bearing and the orbiting scroll hydrodynamic thrust bearing are configured to receive lubricating fluid from the lubricating fluid sump via the one or more oil passages in the first orbiting scroll baseplate;2. The scroll compressor orbiting scroll bearing lubrication system according to claim 1 , further comprising a bearing housing containing one or more oil supply passages claim 1 , wherein the first radial orbital bearing and orbiting scroll ...

Co-Rotating Compressor With Multiple Compression Mechanisms

A compressor may include a shell, first and second compression mechanisms, and first and second motor assemblies. The first compression mechanism may include first and second compression members that are rotatable relative to the shell about first and second rotational axes, respectively. The first motor assembly may be disposed within the shell and may include a first rotor attached to the first compression member. The second compression mechanism may include third and fourth compression members that are rotatable relative to the shell about third and fourth rotational axes, respectively. The second motor assembly may be disposed within the shell and may include a second rotor attached to the third compression member. 1. A compressor comprising:a shell;a first compression mechanism disposed within the shell and including a first compression member that is rotatable relative to the shell about a first rotational axis and a second compression member that is rotatable relative to the shell about a second rotational axis that is parallel to and offset from the first rotational axis;a first motor assembly disposed within the shell and including a first rotor attached to the first compression member;a second compression mechanism disposed within the shell and including a third compression member that is rotatable relative to the shell about a third rotational axis and a fourth compression member that is rotatable relative to the shell about a fourth rotational axis that is parallel to and offset from the third rotational axis; anda second motor assembly disposed within the shell and including a second rotor attached to the third compression member,wherein:the first compression mechanism receives and further compresses fluid discharged from the second compression mechanism,a fourth hub of the fourth compression member includes a discharge passage through which fluid compressed by the second compression mechanism flows, anda second hub of the second compression member ...

COMPRESSOR SYSTEM AND METHOD OF CONTROLLING THE SAME

Provided is a compressor system including a first compressor having: an inlet at which a first inlet guide vane is provided; and an outlet pressure sensor unit configured to measure a pressure at an outlet of the first compressor; a second compressor including an inlet at which a second inlet guide vane is provided; a first control unit configured to adjust a degree of opening of the first inlet guide vane based on the pressure measured by the outlet pressure sensor unit, configured to set the outlet pressure of the first compressor as a set pressure, and configured to generate a first signal including information about the degree of opening of the first inlet guide vane; and a second control unit configured to receive the first signal, and configured to adjust a degree of opening of the second inlet guide vane to control an amount of fluid flowing into the second compressor. 1. A compressor system comprising: an inlet at which a first inlet guide vane is provided; and', 'an outlet pressure sensor unit configured to measure a pressure at an outlet of the first compressor;, 'a first compressor comprisinga second compressor comprising an inlet at which a second inlet guide vane is provided;a first control unit configured to adjust a degree of opening of the first inlet guide vane based on the pressure measured by the outlet pressure sensor unit, configured to set the outlet pressure of the first compressor as a set pressure, and configured to generate a first signal including information about the degree of opening of the first inlet guide vane; anda second control unit configured to receive the first signal, and configured to adjust a degree of opening of the second inlet guide vane to control an amount of fluid flowing into the second compressor.2. The compressor system of claim 1 , wherein the first control unit and the second control unit control the first inlet guide vane and the second inlet guide vane respectively so that the degree of opening of the first ...

Pumping unit and use

A pumping unit is provided, including a primary vacuum pump of a multistage dry type, including at least four pumping stages fitted in series; and a two-stage Roots vacuum pump, including a first pumping stage and a second pumping stage fitted in series, the second pumping stage being fitted in series with and upstream of a first pumping stage of the primary vacuum pump in a direction of flow of gases to be pumped, in which a ratio of a volume displacement of the first pumping stage of the two-stage Roots vacuum pump to a volume displacement of the second pumping stage of the two-stage Roots vacuum pump is less than six, and in which a ratio of a volume displacement of the second pumping stage of the two-stage Roots vacuum pump to a volume displacement of the first pumping stage of the primary vacuum pump is less than six.

Rotary Compressor

An aspect of the present disclosure involves a rotary compressor that is primarily optimized for use without the need for liquid lubricants, such as in the flow path of the fluid being compressed, and is efficient and quiet to use. The compressors described herein are efficient, run quietly, use less power, and last longer than those previously known in the art. The compressors are useful for medical applications and other clean gas applications, for instance, where lubricants could contaminate the fluid being compressed and/or increased noise and/or vibration may be problematic.

COMPRESSOR

A compressor includes a compression mechanism having a ring-shaped first cylinder, a first piston eccentrically rotatable in an interior of the first cylinder, a first cylinder head member disposed adjacent to one axial end of the first cylinder, a second cylinder head member disposed adjacent to an other axial end of the first cylinder, and a fastening bolt. The fastening bolt fastens the first cylinder head member, the first cylinder, and the second cylinder head member together. An end face of the first cylinder head member contacts the first cylinder, and the end face is provided with a protecting groove. The protecting groove is formed closer to a center of the first cylinder than the fastening bolt, and has a groove width smaller than a groove depth of the protecting groove. 1. A compressor comprising: a ring-shaped first cylinder;', 'a first piston eccentrically rotatable in an interior of the first cylinder;', 'a first cylinder head member disposed adjacent to one axial end of the first cylinder;', 'a second cylinder head member disposed adjacent to an other axial end of the first cylinder; and', 'a fastening bolt fastening the first cylinder head member, the first cylinder, and the second cylinder head member together,, 'a compression mechanism including'}an end face of the first cylinder head member contacting the first cylinder, and the end face being provided with a protecting groove, andthe protecting groove being formed closer to a center of the first cylinder than the fastening bolt, and the protecting groove having a groove width smaller shorter than a groove depth thereof.2. The compressor of claim 1 , wherein{'b': '51', 'an other protecting groove is also provided in one axial end face of the first cylinder ().'}3. The compressor of claim 2 , whereinthe protecting groove provided in the end face of the first cylinder head member contacting the first cylinder is formed so as to overlap with the other protecting groove provided in the one axial end ...

Oil distribution in multiple-compressor systems utilizing variable speed

A method of operating a multiple-compressor refrigeration system is provided. This method includes the steps of supplying, via a common supply line, refrigerant gas and oil to a plurality of compressors coupled in series, and attaching an oil flow conduit between adjacent compressors of the plurality of compressors. The oil flow conduit is configured to move oil from a compressor with a relatively higher pressure to a compressor with a relatively lower pressure. The method further includes controlling the pressure for each of the plurality of compressors by regulating a speed at which each of the plurality of compressors operates in order to maintain a pressure differential between the adjacent compressors to facilitate the flow of oil from the compressor with the relatively higher pressure to the compressor with the relatively lower pressure.

Rotary cylinder type compressor

A rotary cylinder type compressor includes: a cylinder that is rotatably placed in an inside of a housing; a rotor that is placed in an inside of the cylinder and is rotatable about an eccentric axis that is eccentric to a rotational central axis of the cylinder; and a partition member that partitions a working chamber formed between an outer peripheral surface of the rotor and an inner peripheral surface of the cylinder into a suction space and a compression space. When a pressure of fluid in the compression space is equal to or larger than a reference pressure, a contact stress, which is exerted at an adjoining portion between the outer peripheral surface of the rotor and the inner peripheral surface of the cylinder, is increased in comparison to a case where the pressure of the fluid in the compression space is smaller than the reference pressure.

VACUUM SYSTEM

A vacuum system is disclosed. The vacuum system includes a first pump bay and a second pump bay enclosed by an enclosure. Each pump bay houses a motor and a vacuum pump driven by the motor. An inlet manifold and an exhaust manifold are in fluid communication with the first and second pump bays. The inlet manifold and the exhaust manifold are arranged to flow air through the pump bays to cool at least the vacuum pumps. 1. A vacuum system comprising:a frame;a plurality of panels attached to the frame and defining an enclosure;a first pump bay and a second pump bay enclosed by the enclosure, the first pump bay and the second pump bay each for including a motor and a vacuum pump driven by the motor during use;an inlet manifold bridging an interior and exterior of the enclosure, the inlet manifold in fluid communication with the first and second pump bays and arranged to extract ambient air from the environment surrounding the vacuum enclosure and deliver the ambient air to the pump bays when in use, the ambient air flows through the first and second bays to cool at least the vacuum pump and subsequently become heated air when in use; andan exhaust manifold bridging an interior and exterior of the enclosure, the exhaust manifold in fluid communication with the first and second pump bays when in use, the exhaust manifold including at least one fan arranged to extract the heated air from the first and second pump bays and expel the heated air back into the environment surrounding the vacuum enclosure.2. The vacuum system according to claim 1 , wherein at least one of the inlet manifold and the exhaust manifold includes at least one baffle arranged to prevent the emission of sound generated by at least one of the motor and the vacuum pump to the environment surrounding the vacuum enclosure.3. The vacuum system according to claim 2 , wherein at least one of the plurality of panels and the at least one baffle is provided with a sound absorbing material.4. The vacuum system ...

Vacuum pump screw rotor

A vacuum pump screw rotor, comprising at least two helical displacer elements on a rotor shaft. The at least two displacer elements have different pitches, but the pitches of each displacer element are constant. Furthermore, the displacer elements each have a helical recess, each having a contour that remains the same over its entire length. Hereby, a suction-side displacer element has a recess having an asymmetric contour, and a pressure-side displacer element has a recess having a symmetrical contour.

MULTI-STAGE SCROLL VACUUM PUMPS AND RELATED SCROLL DEVICES

A multi-stage vacuum pump, expander, or compressor, that incorporates one or more stages of a fixed scroll(s) and orbiting scroll(s) that operates simultaneously. The motor drives the orbiting scroll(s) within the structure, and the various fixed and orbiting scrolls are arranged for either parallel generation of a vacuum or high pressure gas, or arranged in series for generating of a significantly high vacuum or gaseous pressure, or a combination of parallel arranged and series arranged fixed and orbiting scrolls may be embodied within the structure, operated by a single motor means, in order to attain the high efficiencies of operation as a vacuum pump, or a gaseous compressor, during its functioning. The various combinations of orbiting and fixed scrolls, when arranged as aforesaid, can be reduced in size, or miniaturized, and used in conjunction with small appliances, or even in hand-held instruments, as for example, for use in conducting mass spectrometry, or for other purposes. The actual structure of the multi-stage devices can include the fixed and orbiting scrolls adjacent the motor, or the singular motor may be located intermediate various stages of the formed vacuum pump/compressor, in its assembly. 143.-. (canceled)44. A multi-stage vacuum pump comprising:a first fixed scroll;a second fixed scroll opposite from, spaced from, and facing the first fixed scroll, the first fixed scroll fixedly secured to the second fixed scroll;an orbiting plate positioned in between the first fixed scroll and the second fixed scroll, the orbiting plate having a first involute extending toward and interfacing with the first fixed scroll to form a first stage, and a second involute extending toward and interfacing with the second fixed scroll to form a second stage;a third fixed scroll fixedly secured to the second fixed scroll; andan orbiting scroll facing the third fixed scroll and having a third involute extending toward and interfacing with the third fixed scroll to form ...

OIL-INJECTED MULTISTAGE COMPRESSOR DEVICE AND METHOD FOR CONTROLLING SUCH A COMPRESSOR DEVICE

An oil-injected multistage compressor device that comprises at least one low-pressure stage compressor element () with an inlet () and an outlet () and a high-pressure stage compressor element () with an inlet () and an outlet (), whereby the outlet () of the low-pressure stage compressor element () is connected to the inlet () of the high-pressure stage compressor element () via a conduit (), characterized in that an intercooler () is provided between the low-pressure stage compressor element () and the high-pressure stage compressor element () in the aforementioned conduit () and that the compressor device () is also equipped with a restriction () for limiting the amount of oil injected in the low-pressure stage compressor element (). 12453455243662391102aabbab. An oil-injected multistage compressor device that at least comprises a low-pressure stage compressor element () with an inlet () and an outlet () and a high-pressure stage compressor element () with an inlet () and an outlet () , whereby the outlet () of the low-pressure stage compressor element () is connected to the inlet () of the high-pressure stage compressor element () via a conduit () , characterized in that in the aforementioned conduit () between the low-pressure stage compressor element () and the high-pressure stage compressor element () an intercooler () is provided and that the compressor device () is also equipped with a restriction () for limiting the amount of oil injected in the low-pressure stage compressor element ().21010. Oil-injected multistage compressor device according to claim 1 , characterized in that the restriction () is a valve ().310. Oil-injected multistage compressor device according to claim 2 , characterized in that the valve () is an open-closed regulatable valve.410. Oil-injected multistage compressor device according to claim 2 , characterized in that the valve () is a continuously regulatable valve.511369. Oil-injected multistage compressor device according to claim 1 ...

Package Type Fluid Machine

A package type fluid machine having a plurality of fluid machine units each of which includes a fluid machine, a motor that drives the fluid machine, and a belt that connects the fluid machine and the motor. The plurality of fluid machine units are arranged in a cabinet, wherein the plurality of fluid machine units has a pair of the fluid machine units, arranged opposed to each other, with the belts of the fluid machine units facing inward. 1. A package type fluid machine comprising:a plurality of fluid machine units each of which includes a fluid machine, a motor that drives said fluid machine, and a belt that transmits a power of said motor to said fluid machine, said plurality of fluid machine units being arranged in a cabinet, whereinsaid plurality of fluid machine units has a pair of said fluid machine units, arranged opposed to each other, with the belts of said fluid machine units facing inward.2. The package type fluid machine according to claim 1 , further comprisinga pair of intake ports provided on opposed sides of said cabinet, one for each side, with positions of said intake ports of the pair shifted to each other.3. The package type fluid machine according to claim 2 , whereinsaid motor of one of the fluid machine units of said pair of opposed fluid machine units and said fluid machine of the other fluid machine unit are arranged opposed to each other.4. The package type fluid machine according to claim 2 , whereinsaid intake port is provided on a part faced with said motor in said cabinet.5. The package type fluid machine according to claim 1 , further comprisinga main exhaust port provided above said pair of opposed fluid machine units on a top face of said cabinet.6. The package type fluid machine according to claim 1 , whereinsaid cabinet has a column-shaped panel and a side panel attached to said column-shaped panel.7. The package type fluid machine according to claim 6 , whereinsaid side panel, which is arranged opposed to said motor and said ...

CO-ROTATING COMPRESSOR WITH MULTIPLE COMPRESSION MECHANISMS AND SYSTEM HAVING SAME

A compressor may include a shell, first and second compression mechanisms, first and second motor assemblies, first and second suction inlet fittings, and first and second discharge outlet fittings. The first and second compression mechanisms are disposed within the shell. The first and second motor assemblies are disposed within the shell and drive the first and second compression mechanisms, respectively. The first and second motor assemblies are operable independently of each other. The first suction inlet fitting may be attached to the shell and provides fluid to the first compression mechanism. The first discharge outlet fitting may be attached to the shell and receives fluid compressed by the first compression mechanism. The second suction inlet fitting may be attached to the shell and provides fluid to the second compression mechanism. The second discharge outlet fitting may be attached to the shell and receives fluid compressed by the second compression mechanism. 1. A compressor comprising:a shell;a first compression mechanism disposed within the shell;a first motor assembly disposed within the shell and driving the first compression mechanism;a second compression mechanism disposed within the shell;a second motor assembly disposed within the shell and driving the second compression mechanism, wherein the first and second motor assemblies are operable independently of each other,a first suction inlet fitting attached to the shell and providing fluid to the first compression mechanism;a first discharge outlet fitting attached to the shell and receiving fluid compressed by the first compression mechanism;a second suction inlet fitting attached to the shell and providing fluid to the second compression mechanism; anda second discharge outlet fitting attached to the shell and receiving fluid compressed by the second compression mechanism.2. The compressor of claim 1 , wherein the shell includes a partition defining a first suction chamber and a second discharge ...

INTERMEDIATE GAS CONCENTRATION-REGULATING PISTON PRESSURE DEVICE FOR HIGH-TEMPERATURE AUTOCLAVE AND GAS DISTRIBUTION METHOD

A piston pressure device includes a gas concentration-regulating piston pressure device and a high temperature autoclave. In the gas concentration-regulating piston pressure device, the proportion and concentration of corrosive gases can be accurately adjusted, intermediate gases can be stored and filled into the high temperature autoclave according to experimental needs, and an actual corrosion process in oilfield is accurately simulated. Meanwhile, the corrosive gases can be supplemented in real time during the experiment, and dynamic gas distribution in a high-temperature high-pressure corrosion experiment process is realized. The present invention has the advantages as follows: the piston pressure device is resistant to high temperature and high pressure, corrosion-resistant, simple in structure and convenient to operate; the concentration and proportion of the corrosive gases are accurately controlled to be invariable in the high-temperature high-corrosion experiment process; and reliability of high-temperature high-pressure corrosive experimental results is increased. 121. An intermediate gas concentration-regulating piston pressure device for a high temperature autoclave , comprising: a gas concentration-regulating piston pressure device and a high temperature autoclave () , wherein{'b': 1', '5', '6', '8', '12', '14', '15', '17', '18', '19, 'the gas concentration-regulating piston pressure device comprises a plug (), a cylinder (), a piston (), a base (), an oil tank (,) an oil pipe, a gas inlet pipeline (), a gas outlet pipeline (), a vacuum pump (), a four-way valve () and a high temperature autoclave ventilation connection pipeline ();'}{'b': 6', '5', '5', '1', '1', '5', '3, 'the piston () is arranged in the cylinder (); an opening in an upper end of the cylinder () is sealed by the plug (); and the plug () is fixed on the cylinder () via a screw ();'}{'b': 4', '2', '1', '1', '5', '4', '5', '4', '2', '13, 'a concentration probe () and a ventilation ...

Rotary compressor and refrigerating cycle device

In one embodiment, an annular groove and an elastic portion are formed at an end portion of a main bearing on a side facing a cylinder chamber. An annular groove and an elastic portion is formed at an end portion of the sub-bearing on a side facing the cylinder chamber. A depth of the annular groove of the main bearing is formed larger than that of the sub-bearing. An outer peripheral surface of the elastic portion of the main bearing is formed in a straight shape so that thicknesses of a base portion and a tip portion of the elastic portion are the same. An outer peripheral surface of the elastic portion of the sub-bearing is formed in a tapered shape so that a thicknesses of a base portion of the elastic portion is larger than that of a tip portion of the elastic portion.

Compressor Capacity Modulation System For Multiple Compressors

A system includes a plurality of compressors, an evaporator, an expansion device, and a system controller. The compressors may be linked in parallel. The system controller may: determine a saturated evaporator temperature, a saturated condensing temperature, and a target capacity demand; determine an estimated system capacity and an estimated power consumption for each compressor operating configuration; compare the estimated system capacity with the target capacity demand and an error tolerance value; select an optimum operating mode based on the comparisons and based on the estimated power consumption; and command activation and deactivation of the plurality of compressors to achieve the selected optimum operating mode. The optimum operating mode may be selected after the normal system logic achieves a steady state and may be selected from a group having the estimated system capacity within the error tolerance of the target capacity demand and a lowest associated power consumption value. 1. A system comprising:a plurality of compressors linked in parallel by a common discharge line and a common suction line;an evaporator;a condenser; anda system controller that determines a saturated evaporator temperature of the evaporator, a saturated condensing temperature of the condenser, a target capacity demand for the plurality of compressors, and an estimated system capacity and an estimated power consumption for each operating configuration of the plurality of compressors based on the saturated evaporator temperature and the saturated condensing temperature;wherein the system controller compares the estimated system capacity for each operating configuration with the target capacity demand and an error tolerance value and selects an optimum operating mode of the plurality of compressors based on the comparisons and the estimated power consumption for each operating configuration, the optimum operating mode being selected from a group of operating configurations having the ...

Rotary compressor with groove for supplying oil

A rotary compressor may include a rotational shaft coupled to a drive motor and having a central passage, an eccentric portion provided eccentrically from the rotational shaft, a cylinder through which the rotational shaft passes, the cylinder forming a compression chamber in which refrigerant is accommodated, a roller an inner circumferential surface of which is in close contact with an outer circumferential surface of the eccentric portion, the roller rolling and compressing a refrigerant, a vane inserted into the cylinder, the vane protruding from an inner circumferential surface of the cylinder when backpressure is applied to the vane to be in contact with an outer circumferential surface of the roller, and partitioning the compression chamber into a plurality of chambers; a plurality of oil supply grooves on an outer circumferential surface of the eccentric portion; and an oil supply passage that communicates the central passage with the oil supply grooves.

MULTISTAGE PUMP ASSEMBLY WITH AT LEAST ONE CO-USED SHAFT

A multistage pump assembly with at least one co-used shaft comprises a first pump set including at least two vacuum chambers. Each vacuum chamber of the first pump set is installed with at least one rotor and a first driving shaft, the rotor is installed to the first driving shaft in the same vacuum chamber of the first pump set. The first driving shafts in the first pump set are co-shafted, that is, rotors in the at least two vacuum chambers of the first pump set are installed at the same first driving shaft. A second pump set includes at least one vacuum chamber which includes at least one rotor and a second driving shaft. An outlet of the second pump set is connected to an inlet of the first pump set through an air tube. 1. A multistage pump assembly with at least one co-used shaft comprising:a first pump set including at least two vacuum chambers, each vacuum chamber of the first pump set being installed with at least one rotor and a first driving shaft, the rotor being installed to the first driving shaft in the same vacuum chamber of the first pump set; the first driving shafts in all the vacuum chamber of the first pump set are co-shafted, that is, rotors in the at least two vacuum chambers of the first pump set are installed at the same first driving shaft;a second pump set including at least one vacuum chamber which includes at least one rotor and a second driving shaft; andwherein an outlet of the second pump set is connected to an inlet of the first pump set through an air tube.2. The multistage pump assembly with at least one co-used shaft as claimed in claim 1 , wherein the second pump set includes at least two vacuum chambers claim 1 , each vacuum chamber of the second pump set being installed with at least one rotor and a second driving shaft claim 1 , the rotor of the second pump set being installed to the second driving shaft in the same vacuum chamber of the second pump set; the second driving shafts in all the vacuum chambers of the second pump ...

TWO-CYLINDER HERMETIC COMPRESSOR

In the two-cylinder hermetic compressor, a first compression mechanism unit includes a first cylinder and a first piston, and a second compression mechanism unit includes a second cylinder and a second piston. A main bearing is disposed on one surface of the first cylinder, and an intermediate plate is disposed on another surface of the first cylinder. The intermediate plate is disposed on one surface of the second cylinder, and an auxiliary bearing is disposed on another surface of the second cylinder. A shaft is constituted by a main shaft portion which has a rotor attached thereto and is supported by the main bearing, a first eccentric portion having a first piston attached thereto, a second eccentric portion having a second piston attached thereto, and an auxiliary shaft portion supported by the auxiliary bearing. The diameter of the auxiliary shaft portion is set larger than the diameter of the main shaft portion. 1. A two-cylinder hermetic compressor comprising:an electric motor unit and a compression mechanism unit in a sealed container,wherein the electric motor unit and the compression mechanism unit are connected to each other by a shaft,the electric motor unit includes a stator fixed on an inner surface of the sealed container and a rotor that rotates in the stator,a first compression mechanism unit and a second compression mechanism unit are provided as the compression mechanism unit,the first compression mechanism unit includes a first cylinder and a first piston provided in the first cylinder,the second compression mechanism unit includes a second cylinder and a second piston provided in the second cylinder,a main bearing is disposed on one surface of the first cylinder and an intermediate plate is disposed on another surface of the first cylinder,the intermediate plate is disposed on one surface of the second cylinder and an auxiliary bearing is disposed on another surface of the second cylinder,the shaft includes a main shaft portion to which the ...

VOLUMETRIC COMPRESSOR

A two-stage rotary compressor for gas, in particular air. The compressor comprises a bottom plate and a head enclosing between them two compression stages. The compressor is characterized in that an interconnection device is arranged between the two compression stages, said device being suited to establish a communication “in series” or “in parallel”, to be selected by the manufacturer, between said two compression stages. 110. A two-stage rotary compressor () for gas , in particular air;{'b': 10', '20', '30, 'the rotary compressor () comprising a bottom plate () and a head (), which enclose, between them, two compression stages ((I), (II));'}{'b': 100', '100', '100', '100', '100, 'the rotary compressor being characterised in that between said two compression stages ((I), (II)) an interconnection device (; *; **) is arranged, which is suited to establish a communication “in series” (*) or “in parallel” (**), to be selected by the manufacturer, between said two compression stages ((I), (II)).'}2101001001007080. A two-stage rotary compressor () claim 1 , according to claim 1 , characterised in that said interconnection device (; *; **) comprises a first dividing plate () and a second dividing plate () claim 1 , which are packed one on the other.3107080. A two-stage rotary compressor () claim 2 , according to claim 2 , characterised in that said first dividing plate () and said second dividing plate () are identical.41070807080707070708080808070807080. A two-stage rotary compressor () claim 2 , according to claim 2 , characterised in that each dividing plate ( claim 2 , ) comprises a respective main body (A claim 2 , A) with four respective slots (D claim 2 , E claim 2 , F claim 2 , G; D claim 2 , E claim 2 , F claim 2 , G) claim 2 , and one respective opening (H; H) which is associated with a respective longitudinal recess (L; L).510708095. A two-stage rotary compressor () claim 4 , according to claim 4 , characterised in that the two longitudinal recesses (L; L) face ...

Multistage compression system

A multistage compression system uses refrigerant and oil. The multistage compression system includes a low-stage compressor that compresses the refrigerant, a high-stage compressor that further compresses the refrigerant compressed by the low-stage compressor, refrigerant pipes that-introduce the refrigerant compressed and discharged by the low-stage compressor into a suction part of the high-stage compressor, a pressure reducing element disposed between the refrigerant pipes, an accumulator disposed between the refrigerant pipes at a downstream side of the pressure reducing element and at an upstream side of the high-stage compressor, and an oil discharge pipe. The oil discharge pipe discharges the oil in the low-stage compressor. The oil discharge pipe connects the low-stage compressor and a portion of the refrigerant pipes. The portion of the refrigerant pipes is on a downstream side of the pressure reducing element and an upstream side of the accumulator.

VACUUM PUMP

There is provided a vacuum pump capable of preventing foreign materials from flowing into a gap between rotors or the like and obtaining low ultimate pressure. The vacuum pump includes two rotating shafts formed extending in a first axial direction, a rotor casing, rotors, and a shielding portion. The rotor casing includes a rotor chamber disposed along the two rotating shafts, a suction port communicating with the rotor chamber, and an exhaust port communicating with the rotor chamber. The rotors are mounted on the two rotating shafts and disposed in the rotor chamber. The shielding portion is configured to prevent a gas sucked from the suction port into the rotor chamber from directly flowing into a gap between the rotors and is disposed between the suction port and inside the rotor chamber. 1. A vacuum pump comprising:two rotating shafts formed extending in a first axial direction;a rotor casing including a rotor chamber disposed along the two rotating shafts, a suction port communicating with the rotor chamber, and an exhaust port communicating with the rotor chamber;rotors mounted on the two rotating shafts and disposed in the rotor chamber; anda shielding portion configured to prevent a gas sucked from the suction port into the rotor chamber from directly flowing into a gap between the rotors and disposed between the suction port and inside the rotor chamber.2. The vacuum pump according to claim 1 , whereinthe rotors are roots type rotors or claw type rotors.3. The vacuum pump according to claim 1 , whereinwhen viewed from the suction port toward inside the rotor chamber, the shielding portion is disposed in front of a gap between the rotors.4. The vacuum pump according to claim 1 , whereinthe shielding portion is disposed upstream of the rotors and is disposed between the two rotating shafts when viewed from the suction port toward inside the rotor chamber.5. The vacuum pump according to claim 1 , whereinthe shielding portion has a tapered shape narrow on an ...

Rotating Cylinder Enthalpy-Adding Piston Compressor and Air Conditioning System Having Same

Disclosed is a rotating cylinder enthalpy-adding piston compressor. The compressor is a two-stage rotating cylinder piston compressor, including a first-stage rotating gas cylinder, a first gas cylinder liner, a first piston, and a second-stage rotating gas cylinder, a second gas cylinder liner, and a second piston, and further including an enthalpy-adding assembly connected between the first-stage rotating gas cylinder and the second-stage rotating gas cylinder for supplying gas and adding enthalpy between the two stages of rotating cylinders. By means of adopting a two-stage rotating cylinder piston compressor and arranging an enthalpy-adding assembly between the two stages of rotating cylinders, an enthalpy-adding function is achieved for the rotating cylinder piston compressor and the air conditioning system having same, thereby increasing the enthalpy value of the refrigerant in the system, improving the refrigerating and heating capabilities, improving the energy efficiency ratio and enhancing the reliability of the system. 1. A rotating cylinder enthalpy-adding piston compressor , comprising: a first-stage rotating cylinder;', 'a first cylinder liner;', 'a first piston;', 'a second-stage rotating cylinder;', 'a second cylinder liner;', 'a second piston; and', 'an enthalpy-adding assembly, which is connected between the first-stage rotating cylinder and the second-stage rotating cylinder, and which is configured to supply gas and add enthalpy between two stages of rotating cylinders., 'a two-stage rotating cylinder piston compressor, comprising2. The rotating cylinder enthalpy-adding piston compressor according to claim 1 , wherein claim 1 , the enthalpy-adding assembly comprises an enthalpy-adding component provided outside the compressor and an enthalpy-adding pipeline configured to connect the enthalpy-adding component to an interior of the compressor.3. The rotating cylinder enthalpy-adding piston compressor according to claim 1 , further comprising a ...

Compressor Mounting System

A mounting system for an industrial compression system including a first component close-coupled to a second component includes a first support for the first component. The first support is configured to resist movement of the first component in a first direction substantially horizontal relative to the first component, a second direction substantially vertical relative to the first component, and an axial direction relative to the first component. The mounting system also includes a second support for the second component. The second support is configured to resist movement of the second component in a first direction substantially horizontal relative to the second component and a second direction substantially vertical relative to the second component, wherein the second support permits movement of the second component in an axial direction relative to the second component.

Suction line arrangement for multiple compressor system

A compressor includes a shell assembly and a compression mechanism disposed within the shell assembly. The shell assembly includes first and second end caps. A suction chamber is disposed within the shell assembly between the first end cap and the second end cap. A discharge chamber and oil sump may be disposed within the shell assembly. The shell assembly includes at least one suction opening into the suction chamber. A distributor is in communication with one of the suction openings. Plugs may sealingly engage another one of the suction openings. The distributor includes an inlet path and first and second outlet paths. A suction line is coupled to the inlet path. The suction line includes at least first and second portions. A first plane bisecting the second portion along a length of the second portion is perpendicular to a second plane that bisects the first and second outlet paths.

Oil-injected multi-stage compressor system and procedure for controlling such a compressor system

An oil-injected multi-stage compressor system that comprises at least a low-pressure stage compressor element (2) with an inlet (4a) and an outlet (5a) and a high-pressure stage compressor element (3) with an inlet (4b) and an outlet (5b), whereby the outlet (5a) of the low-pressure stage compressor element (2) is connected to the inlet (4b) of the high-pressure stage compressor element (3) through a pipeline (6), characterized in that the compressor elements (2, 3) are provided with their own drive in the form of an electric motor (2a, 3a), whereby the compressor elements (2, 3) are connected to the electric motor (2a, 3a) either directly or through a gearbox and that an intercooler (9) is provided in the aforementioned pipeline (6) between the low-pressure stage compressor element (2) and the high-pressure stage compressor element (3).

Multiple Pump Arrangement

An adaptive eccentric screw pump, which enables, if necessary, an increase of the output, the pressure and/or the simultaneous output of more than one output medium, and wherein the eccentric screw pump has comparably low energy consumption and the production and maintenance expenditure thereof is kept low. For this purpose, the eccentric screw pump is equipped with a modular output system, including at least two output modules having in each case one rotor and one stator, wherein the output modules are coupled to one another and merely one actuation unit is associated with the output system, and wherein the output system for an output medium has more than one inlet and/or outlet or at least one modular perfusion housing. 1. An eccentric screw pump with a modular delivery system , comprising at least two delivery modules comprising in each case a rotor and a stator , wherein the delivery modules are coupled together and only one drive device is assigned to the delivery system and wherein the delivery system comprises more than one inlet and/or outlet or at least one modular through-flow housing for the delivery medium.2. The eccentric screw pump according to claim 1 , wherein the delivery modules are coupled together in each case by a suction housing claim 1 , a pressure housing or a through-flow housing.3. The eccentric screw pump according to claim 1 , wherein the rotors of the delivery modules are coupled together in the suction housing or pressure housing by a rigid connection.4. The eccentric screw pump according to claim 3 , wherein the rotors are coupled together detachably.5. The eccentric screw pump according to claim 1 , wherein the rotor for the delivery modules is constituted in one piece.6. The eccentric screw pump according to claim 1 , wherein a specific mixing ratio of the delivery media can be fixed by the selection and configuration of the delivery modules.7. The eccentric screw pump according to claim 1 , wherein the axial force acting in the ...

MULTI-STAGE COMPRESSING SYSTEM AND CONTROL METHOD THEREOF

The present disclosure relates to a multi-stage compression system in which the drive speed of each compressor that constitutes the multi-stage compression system is individually controlled to increase compression efficiency, and a control method thereof. To this end, the present disclosure includes at least two compressors, at least two driving devices connected to each of the compressors in series to drive the compressors connected in series, at least two pressure detectors installed at a discharge end of each of the compressors to detect a discharge pressure of each compressor, and a control unit configured to individually control a drive speed of each driving device based on the discharge pressure of each compressor detected through each of the pressure detectors. 1. A multi-stage compression system , comprising:at least two compressors;at least two driving devices connected to each of the compressors in series to drive the compressors connected in series;at least two pressure detectors installed at a discharge end of each of the compressors to detect a discharge pressure of each compressor; anda control unit configured to individually control a drive speed of each driving device based on the discharge pressure of each compressor detected through each of the pressure detectors.2. The multi-stage compression system according to claim 1 , further comprising:at least two couplings connecting each of the compressors to the corresponding driving devices in series.3. The multi-stage compression system according to claim 1 , wherein the control unit controls a drive speed of a driving device connected to a first stage compressor based on a discharge pressure of a final stage (nstage) compressor claim 1 , and a drive speed of a driving device connected to a remaining stage (2stage claim 1 , . . . claim 1 , nstage) compressor based on a discharge pressure of a front stage (1stage claim 1 , . . . claim 1 , n-1stage) compressor.4. The multi-stage compression system ...

ROTARY COMPRESSOR AND ASSEMBLY METHOD THEREOF

A rotary compressor that may include an upper or outboard bearing above the motor components and, in this case, includes an upper bearing plate having a structure that ensures bearing alignment when press fit with an upper cap and a center shell. In some implementations, a main bearing frame that secures and holds a main bearing has a structure that when press fit with a lower cap and center shell ensure bearing alignment. Some implementations include disposing a hermetic terminal and a discharge port a the side of the upper cap or center shell. 1. A rotary compressor , comprising:a housing, including a first cap, a second cap, and a center shell, the first cap disposed opposite the center shell from the second cap in an axial direction;a main shaft extending along a main axis;two rotary compression units each having a suction port and a cylinder to compress fluid;a motor including a rotor and a stator;an outboard bearing supporting the main shaft;a main bearing supporting the main shaft;an outboard bearing plate housing the outboard bearing that is disposed opposite the motor from the main bearing in the axial direction;a main bearing frame housing the main bearing disposed between the two rotary compression units and the motor in the axial direction,wherein the center shell is essentially cylindrical and a first edge surface and a second edge surface of the center shell are parallel to one another, and perpendicular to the main axis, andwherein the first edge surface of the center shell contacts a first surface of the outboard bearing plate that is perpendicular to the main axis of the rotary compressor.2. The rotary compressor of claim 1 ,wherein a first portion of the center shell contacts an outer peripheral second surface of the outboard bearing plate of a first predetermined diameter, which is perpendicular to the first surface and concentric with a bearing bore of the outboard bearing plate that houses the outboard bearing.3. The rotary compressor of claim 1 ...

ROTARY COMPRESSOR HAVING TWO CYLINDERS

A rotary compressor having two cylinders includes crankshaft having first eccentric portion and second eccentric portion connected to each other by connecting portion. The rotary compressor further includes two compressive elements that compress working fluid in cylinder as first piston inserted over first eccentric portion eccentrically rotates in accordance with rotation of crankshaft. Further, first piston inserted over first eccentric portion undergoes assembly by being inserted over first eccentric portion through second eccentric portion. Further, a releasing portion is provided at each of outer diameter portions of first eccentric portion and second eccentric portion. 15-. (canceled)6. A rotary compressor having two cylinders , comprising:a crankshaft having a first eccentric portion and a second eccentric portion connected to each other by a connecting portion; andtwo compressive elements that compress working fluid in a cylinder as a first piston inserted over the first eccentric portion eccentrically rotates in accordance with rotation of the crankshaft,wherein the first piston inserted over the first eccentric portion undergoes assembly by being inserted over the first eccentric portion through the second eccentric portion,a releasing portion is provided at each of outer diameter portions of the first eccentric portion and the second eccentric portion on the connecting portion side,Hc-c Подробнее

OIL EQUALIZATION CONFIGURATION FOR MULTIPLE COMPRESSOR SYSTEMS CONTAINING THREE OR MORE COMPRESSORS

A refrigeration system with at least three compressors connected in a circuit. Each compressor has a housing with an oil sump. The oil sump is adapted to contain oil that defines an oil level. A supply line supplies refrigerant and entrained oil to each of the at least three compressors. The oil sump of each compressor has at least one oil port. Each oil port is disposed at an elevation that is equal to or minimally higher than the level of oil to promote equalization of oil levels in each compressor. There are a plurality of separate conduits which are not directly connected, but connected through the oil sumps of separate compressors. At least one compressor includes an oil sump extension having connections for the separate conduits. Each oil port is connected to the separate conduits or an oil sump extension. Each separate conduit connects a pair of compressors. 1. A refrigeration system comprising:at least three compressors connected in a fluid circuit, each compressor having a compressor housing having an oil sump in a lower portion thereof, the oil sump adapted to contain oil that defines an oil level when in a fully filled oil state;a supply line which supplies oil to each of the at least three compressors in any operating mode of the at least three compressors,wherein the oil sump of each compressor of the at least three compressors has at least one oil port in the lower portion, each oil port disposed at an elevation that is equal to or higher than the oil level of oil to thereby promote equalization of oil levels among the oil sumps;a plurality of separate conduits, wherein the separate conduits are not directly connected to other conduits, but are fluidically connected through the oil sumps of separate compressors of the at least three compressors;wherein one of the at least three compressors includes an oil sump extension having connections for at least one of the plurality of separate conduits, the oil sump extension configured to permit oil flow ...

VACUUM PUMP

A multi-stage vacuum pump comprising: first and second half-shell stator components defining a plurality of pumping chambers and for assembly together along respective longitudinally extending faces; first and second end stator components for assembly at respective longitudinal end faces of the first and second half-shell stator components; gaskets for sealing between the first and second half-shell stator components when assembled together at the longitudinally extending faces; and O-rings for sealing between the first and second end stator components and the first and second half-shell stator components when assembled; wherein annular channels intersect longitudinal recesses and each longitudinal recess comprises a stop fixed relative to the intersection, and the gasket and the longitudinal recess are configured that when the gasket is located in the recess during assembly the gasket is biased against the stop for locating an end portion of the gasket relative to the intersection. 1. A multi-stage vacuum pump comprising:first and second half-shell stator components defining a plurality of pumping chambers for assembly together along respective longitudinal faces;first and second end stator components for assembly at respective end faces of the first and second half-shell stator components;gaskets for location in a longitudinal recess of respective longitudinal faces for sealing between the first and second half-shell stator components when assembled together; andO-rings for location in annular channels counter-sunk in respective end faces for sealing between the first and second end stator components and the first and second half-shell stator components when assembled;wherein the annular channels intersect the longitudinal recesses and each longitudinal recess comprises a stop fixed relative to the intersection, and the gasket and the longitudinal recess are configured that when the gasket is located in the recess during assembly the gasket is biased against the ...

Vacuum-generating pumping system and pumping method using this pumping system

The present invention relates to a pumping system to generate a vacuum (SP), comprising a main vacuum pump which is a dry screw pump ( 3 ) having a gas suction inlet ( 2 ) connected to a vacuum chamber ( 1 ) and a gas discharge outlet ( 4 ) leading into a gas evacuation conduit ( 5 ) in the direction of a gas exhaust outlet ( 8 ) outside the pumping system. The pumping system comprises a non-return valve ( 6 ) positioned between the gas discharge outlet ( 4 ) and the gas exhaust outlet ( 8 ), and an auxiliary vacuum pump ( 7 ) connected in parallel to the non-return valve. In a pumping method by means of this pumping system (SP), the main vacuum pump ( 3 ) is started up in order to pump the gases contained in the vacuum chamber ( 1 ) and to discharge these gases through its gas discharge outlet ( 4 ), simultaneously to which the auxiliary vacuum pump ( 7 ) is started up. Moreover the auxiliary vacuum pump ( 7 ) continues to pump all the while that the main vacuum pump ( 3 ) pumps the gases contained in the vacuum chamber ( 1 ) and/or all the while that the main vacuum pump ( 3 ) maintains a defined pressure in the vacuum chamber ( 1 ).

Refrigerant Compressor System

Refrigerant compressor installation comprising at least three compressors which are arranged in parallel between an intake conduit and a pressure conduit and which each comprise a lubricant sump unit, wherein the compressors, when in operation, work in such a way that the respective pressures in the respective lubricant sump units of the respective compressors form a pressure cascade according to which the compressors have a successively slightly decreasing pressure in the respective lubricant sump unit in a defined cascade sequence, and wherein the lubricant sump units are connected to each other in a manner corresponding to the cascade sequence by way of a lubricant conduit system for lubricant transport, and wherein each lubricant sump unit comprises a port to which is connected an insert element which on the one hand establishes communication with the lubricant conduit system and on the other hand is configured such that it predetermines, for the respective lubricant sump unit, a lubricant level from which lubricant is transported to the lubricant sump unit that follows next in the cascade sequence.

THERMODYNAMICALLY INTERACTIVE HEAT FLOW PROCESS AND MULTI-STAGE MICRO POWER PLANT

A high efficiency, thermodynamically interactive power system incorporating a “thermodynamic battery” operating in the cryogenic range. The “thermodynamic battery” is drawn upon to optimize the efficiency of power generation during times of peak demand and is “recharged” during periods of low demand. The system is ideally suited for (although not limited to) micropowerplants suitable for widely distributed generation of power in or associated with homes and small businesses, reducing transmission loading on the grid and capable of supplying power into the grid during peak load periods. The widely distributed power generation made practical by present inventions also enables distribution of heating and chill service locally on a much larger scale than is possible with large, centralized generation plants. A novel form of gear pump mechanism makes possible inexpensive and effective multi-stage compression and expansion of gaseous working fluid particularly suitable for incorporation into micropowerplants for distributed and localized power generation. 1. A compressor mechanism for a gaseous fluid medium , which comprisesa pair of first and second gears mounted for rotation on respective first and second shafts,said gears having opposite axial end faces and having gear teeth disposed circumferentially about said gears and extending between said axial end faces,the gear teeth of said first and second gears meshing in a limited region adjacent to a plane defined by said first and second shafts,a housing having opposed end faces closely enclosing the axial end faces of said gears and having internal surfaces of circular configuration closely surrounding outer ends of said circumferentially disposed gear teeth and, together with said housing end faces, defining enclosed pockets between adjacent gear teeth for conveying said gaseous fluid medium,said housing having fluid inlet and outlet passage means on opposite sides of said plane, for directing gaseous fluid medium to ...

Compressor, Air Conditioning System, and a Method of Controlling a Compressor

A compressor includes two parallel arranged primary cylinders and a secondary cylinder arranged in the downstream of the two primary cylinders. The secondary cylinder includes a cylinder body and a sliding vane. The sliding vane is arranged inside the cylinder body. A locking part is used for locking and unlocking the sliding vane. The locking part is clamped with and separated from the sliding vane. When the sliding vane is in the locking position, the sliding vane is locked in a seal cavity inside the secondary cylinder, and the locking end of the locking part extends to the side at which the secondary cylinder is located. The compressor can be switched between a single-stage mode and a double-stage mode. In the condition of light load, energy efficiency can be improved and the waste of energy sources is avoided. An air conditioning system and compressor control method are also disclosed. 1. A compressor , comprising:two primary-stage cylinders disposed in parallel;a secondary-stage cylinder disposed downstream of the two primary-stage cylinders, comprising a cylinder body and a sliding vane provided inside the cylinder body; anda locking part for locking or unlocking the sliding vane, the locking part being engaged to or disengaged from the sliding vane, such that when the sliding vane is in a locked position, the sliding vane is locked within a closed cavity of the secondary-stage cylinder, and a locking end of the locking part protrudes towards the secondary-stage cylinder.2. The compressor according to claim 1 , wherein the compressor further comprises an enthalpy-increasing component comprising:an enthalpy-increasing cavity, the secondary-stage cylinder being in communication with the enthalpy-increasing cavity; each of the two primary-stage cylinders being in communication with the enthalpy-increasing cavity, and the locking part being slidably disposed within the enthalpy-increasing cavity, and a locking end of the locking part protruding towards the ...