Abstract: Disclosed is a direct-drive refrigerant screw compressor, having: a housing; a compression chamber in the housing; a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; wherein, for each rotor, the compressor includes: a plurality of bearing packs disposed within a respective plurality of bearing chambers; a working fluid disposed within each of the plurality of bearing chambers, the working fluid providing oil-free lubrication to the plurality of bearing packs; a plurality of bearing lubrication ports extending through the housing and into each of the plurality of bearing chambers, and configured for injecting the working fluid into each of the plurality of bearing chambers when the compressor is running.

Abstract: Disclosed is a direct-drive refrigerant screw compressor, having: a housing; a compression chamber in the housing; a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; a fluid being disposed in the compression chamber, the fluid consisting of a working fluid for providing lubrication to each rotor; a first port extending through the housing and configured for directing the fluid toward the compression chamber; and when the compressor is activated, each rotor rotates and the fluid is distributed about each rotor to lubricate each rotor.

Abstract: A gear pump includes gears received within a housing defining an inlet, an outlet and end plates. The gears have shaft portions on each of two sides of each of the two gears. The shaft portions are mounted in journal bearings. The journal bearings each have a gear side face adjacent one of the two gears. A remote face is on a remote side of the journal bearing remote from each of the two gears. There is a plurality of heat pipes in at least one of the journal bearings. The heat pipes move heat from the gear face of the at least one of the journal bearings to the remote face. The plurality of heat pipes is enclosed by the housing, and extend generally in an axial direction from an end adjacent the gear face to an end adjacent the remote face. A fuel supply system is also disclosed.

Abstract: A refrigeration system includes a compressor having a hermetically sealed housing and a compression mechanism which is positioned inside the housing; a condenser which is fluidly connected to the compressor; an evaporator which is fluidly connected between the condenser and the compressor; a magnetic coupling having a drive coupling half positioned outside the housing and a driven coupling half positioned inside the housing and separated from the drive coupling half by a separation wall portion of the housing; and a fluid conduit for communicating a portion of liquid refrigerant from the condenser to an inside surface of the separation wall portion. During operation, the liquid refrigerant from the condenser is evaporated on or adjacent the inside surface of the separation wall portion to thereby dissipate heat generated by magnetically induced eddy currents in the separation wall portion.

Abstract: A screw spindle pump having a spindle housing, in which a drive spindle and at least one running spindle which meshes therewith are received in spindle bores, and which has an axial fluid inlet and an axial fluid outlet, and also an outer housing enclosing the spindle housing, wherein either a support device which axially supports the at least one running spindle and includes an axially projecting support pin is provided on the spindle housing, which is plastic, in the region of the fluid outlet, or a support device which axially supports the at least one running spindle and includes an axially projecting support pin is provided on a housing plate which is fitted on the outer housing, axially closes the outer housing, and is plastic.

Abstract: A scroll compressor may include a casing having a low pressure portion and a high pressure portion, a refrigerant suction pipe that communicates with the low pressure portion and a refrigerant discharge pipe that communicates with the high pressure portion, a drive motor installed inside of the low pressure portion, an orbiting scroll coupled to the drive motor to perform an orbiting motion, a non-orbiting scroll engaged with the orbiting scroll to form a compression chamber, and a refrigerant guide provided on the non-orbiting scroll to guide a refrigerant suctioned into the low pressure portion to be suctioned into the compression chamber, whereby an increase in specific volume of refrigerant suctioned into the compression chamber may be suppressed, and thus, an amount of refrigerant suctioned into the compression chamber may increase, thereby improving efficiency of the compressor.

Abstract: A scroll compressor includes: a shell forming an outer case, a fixed scroll and an orbiting scroll stored in the shell, a frame holding the orbiting scroll, a thrust plate between the orbiting scroll and the frame, and a thrust oil return pipe fixed to the frame. The shell forms an oil reservoir in which lubricating oil is reserved. The orbiting scroll and fixed scroll form a compression chamber. Lubricating oil flows through the thrust oil return pipe to return to the oil reservoir. A hole portion on the thrust plate passes from a first surface portion that slidably contacts the orbiting scroll to a second surface portion facing the frame. The thrust oil return pipe is inserted into the hole portion and fits in the thrust plate.

Abstract: A compressor includes a compression mechanism and a driveshaft that drives the compression mechanism. The driveshaft may include a first axially extending passage, a second axially extending passage, and a lubricant distribution passage. The first and second axially extending passages may be radially offset from each other and may intersect each other at an overlap region. The first and second axially extending passages are in fluid communication with each other at the overlap region. The lubricant distribution passage may extend from the first axially extending passage through an outer diametrical surface of the driveshaft. The lubricant distribution passage may be disposed at a first axial distance from a first axial end of the driveshaft. A first axial end of the overlap region may be disposed at a second axial distance from the first axial end of the driveshaft. The first axial distance may be greater than the second axial distance.

Abstract: A scroll compressor includes a casing, a scroll compression mechanism, a motor, a crankshaft, a bearing, a frame fixed to the casing; and an oil separation member fixed to the frame. The motor includes a stator and a rotor rotatable in a rotational direction. The bearing rotatably supports the crankshaft. The oil separation member suppresses mixing of a refrigerant and a lubricating oil. The frame supports the bearing and has first and second fixed legs fixed to the casing. The oil separation member has a first horizontal and inclined surfaces. The first inclined surface has a first inclined surface upstream portion and a first inclined surface downstream portion. The first inclined surface downstream portion is disposed higher than the first inclined surface upstream portion. The first horizontal surface, the first inclined surface, and the first fixed leg are disposed in order from upstream to downstream in the rotational direction.

Abstract: A scroll compressor includes an oil circulation pipe having one end inserted through a casing to be connected to an oil storage space inside the casing and another end connected to a suction passage for supplying refrigerant from outside of the casing to a compression chamber, an oil circulation valve disposed between the both ends of the oil circulation pipe to selectively open or close the oil circulation pipe, and a controller to control an opening or closing operation of the oil circulation pipe to reduce or eliminate frictional loss due to a shortage of oil by adjusting an oil level of the oil storage space at an initial operation.

Abstract: Disclosed are an oil supplying mechanism, and a horizontal compressor having same. Disclosed is an oil supply mechanism for a horizontal compressor, the horizontal compressor including a housing, a motor, a rotating shaft driven by the motor, and a bearing pedestal supporting the rotating shaft. The oil supply mechanism includes a separating member, the separating member being in the form of a ring having a central hole for allowing the bearing pedestal to pass therethrough, and the separating member being configured to separate the housing into an oil storage chamber and a motor chamber with the motor provided therein. The separating member is constructed to have an annular groove opening into the oil storage chamber. The oil supply mechanism and the horizontal compressor having the oil supply mechanism can reduce or minimize free space in the motor chamber and/or facilitate a quality inspection on the structure of a pump.

Abstract: A scroll compressor includes a hermetic container, a fixed scroll, a swing scroll, a frame, an electric motor, and a shaft. A first groove and a second groove are provided outside a fixed wrap in a radial direction at an end plate surface of the fixed scroll. An oil supply hole for guiding lubricant oil from a through-hole opens at an end plate surface of the swing scroll. A single opening of the oil supply hole alternately communicates with the first groove and the second groove along with swing of the swing scroll.

Abstract: The sharpening system for cutter blades for cutting flexible materials in automatic cutting machines comprises at least one sharpening element, and it also comprises a first sharpening module that includes at least one first sharpening element, and a second sharpening module that includes at least one second sharpening element. It provides a sharpening system that offers an integral and simple solution to current sharpening systems by incorporating an active sharpening system in the guide plate, either in the rotary area or on the outside, or symmetrically in the upper part of the lower body of the cutting head, interchangeably.

Abstract: A motor-operated compressor includes a compression unit including a compression chamber formed by a plurality of scrolls engaged with each other. The compressor includes a rotation shaft having one end coupled to one of the scrolls and a rotor coupled with another end of the rotation shaft. The compressor includes a stator radially separated from the rotor by a predetermined gap. The compressor includes a casing having a motor chamber. The stator is inserted in the motor chamber and divides the motor chamber into a first space and a second space. The casing includes an inlet port coupled to the first space to guide a refrigerant toward the motor chamber. The casing also includes a suction guide passage coupled to the second space to guide the refrigerant sucked through the inlet port toward the compression unit. A communication passage portion in the rotation shaft communicates the first and second spaces.

Abstract: A twin-shaft pump comprising: a pumping chamber; two rotatable shafts each mounted on bearings is disclosed. Each of the two rotatable shafts comprises at least one rotor element, the rotor elements being within the pumping chamber and the two rotatable shafts extending beyond the pumping chamber to a support member. The support member comprises mounting means for mounting the bearings at a predetermined distance from each other, the predetermined distance defining a distance between the two shafts. A thermal break between the pumping chamber and the support member is provided for impeding thermal conductivity between the pumping chamber and the support member, such that the pumping chamber and support member can be maintained at different temperatures. The support member and the rotor elements are formed of different materials, a coefficient of thermal expansion of a material forming the support member being higher than a coefficient of thermal expansion of a material forming the rotor elements.

Abstract: A crankshaft assembly, a compressor and a refrigeration device are provided. The crankshaft assembly has an eccentric shaft component, a spindle component and a main screw oil pump. The eccentric shaft component has an eccentric cavity, and the spindle component has a first cavity communicated with the eccentric cavity. A first through-hole and a second through-hole in a first spindle are each communicated with the first cavity. An outer surface of the first spindle is provided with a first spiral oil groove connecting the first through-hole and the second through-hole. An outer surface of the main screw oil pump is provided with a second spiral oil groove along its length direction, and a spiral direction of the second spiral oil groove is opposite that of the first spiral oil groove.

Abstract: A rotary compressor includes a first cylinder, a first piston and a drive shaft. The drive shaft includes a first eccentric portion, a first shaft portion rotatably supported by a first bearing, and a first coupling portion coupling the first shaft portion with the first eccentric portion. The first piston is fitted to the first eccentric portion. The first shaft portion has a cylindrical shape coaxial with the rotational center axis. Re1?e1<R1. Re1 is a radius of the first eccentric portion. R1 is a radius of the first shaft portion. e1 is an eccentricity of the first eccentric portion. An outer surface of the first coupling portion does not extend radially out of the outer surface of the first eccentric portion. A circumferentially extending groove is formed at an end of an inner peripheral surface of the first piston on a first coupling portion side in the axial direction of the drive shaft.

Abstract: A rotary compressor is provided that may include a roller slidingly coupled to an eccentric portion of a rotational shaft so as to be moved along an inner circumferential surface of a cylinder by the rotational shaft, and a vane slidingly coupled to the cylinder so as to divide the compression space into a plurality of compression chambers. An oil supply groove may be formed on an outer circumferential surface of the eccentric portion or an inner circumferential surface of the roller that faces the outer circumferential surface of the eccentric portion, and a depth of the oil supply groove may decrease as a distance in a circumferential direction from the second oil supply hole increases. Accordingly, an amount of oil supplied between the eccentric portion and the roller may be increased to thereby reduce friction loss.

Abstract: A system includes a compressor configured to compress a vapor, or a vapor and liquid mixture, and a first rotor of the compressor disposed on a first shaft, where the first rotor includes a first plurality of pockets in a first body portion to form a first semi-hollow internal volume or a plurality of flanks and/or a first plurality of flutes on a first external surface of the first rotor, where the plurality of flanks or the first plurality of flutes comprises a first pitch to form first variable leads.

Abstract: A rotor has at its two axis end portions an upper large-diameter inner circumferential portion and a lower large-diameter inner circumferential portion that have inner diameters larger than the inner diameter of the axially middle portion of the rotor and are offset in the radial direction. A crankshaft has a passageway, which is formed in the crankshaft and allows refrigerant to flow therethrough, and a gas venting hole, which provides communication between the passageway and at least one discharge opening formed in the outer circumferential surface of the crankshaft. The at least one discharge opening is formed at a position facing the inner circumferential surface of the lower large-diameter inner circumferential portion 5b on the compression unit side.

Abstract: A compressor includes a rotor having an outer compression surface and a plurality of inner heat exchange surfaces. A coolant supply manifold fluidly connects with a coolant inlet in a first axial end of the rotor, and delivers coolant fluid by way of conduits having an axial distribution in the rotor so as to deliver coolant fluid to the heat exchange surfaces. The coolant may be a refrigerant that undergoes a phase change within the rotor.

Abstract: In one aspect, described is a rotor of a rotary internal combustion engine, including a phasing gear with an annular meshing section including a plurality of radially inwardly oriented teeth and an annular attachment section connected to the meshing section and coaxial therewith, the attachment section being offset axially inwardly from the teeth and having at least a portion thereof located radially inwardly of the teeth, and a fastener apparatus connecting the phasing gear to the rotor body, the fastener apparatus engaging the rotor body radially inwardly of the teeth.

Abstract: A rotary compressor includes a drive mechanism having a drive shaft with an eccentric part, and a compression mechanism. The compression mechanism includes a tubular cylinder covering an outer periphery of the eccentric part, a piston arranged inside the cylinder and fitted onto the eccentric part, an upper end plate closing an upper end of the cylinder, and a lower end plate closing a lower end of the cylinder. A lower end surface of the eccentric part defines a thrust bearing surface slidably contacting an upper end surface of the lower end plate. The drive shaft has an oil path with lubrication oil circulating through the oil path. The eccentric part has a circumferentially extending pressure reduction groove opening at part of the thrust bearing surface close to an inner circumferential side to reduce a pressure of the lubrication oil supplied from the oil path to the pressure reduction groove.

Abstract: Described herein is a device comprising: a chamber wall comprising outer and inner surfaces, wherein the inner surface encloses a lobed chamber with a plurality of lobes and the inner surface comprises segments of arcuate surfaces, each of the segments of arcuate surfaces being tangent with its immediate neighboring segments, and wherein the chamber wall further comprises channels connecting the outer surface and the inner surface of the chamber wall and/or channels through an end surface of the chamber wall; a lobed piston configured to translate along a circular path relative to the chamber wall, the outer surface of the piston and the inner surface of the chamber wall engaged during translation; and holes fluidly connected to the lobed chamber and configured to allow fluid discharge from the lobed chamber through the holes and to prevent fluid flow into the lobed chamber through the holes.

Abstract: A thrust plate for a compressor may include first and second ends and a feed hole. The first end may include a thrust surface. The second end may include a lubricant accumulation feature. The feed hole may extend between the lubricant accumulation feature and the thrust surface to provide communication therebetween. The feed hole may be angled relative to a longitudinal axis of the thrust plate such that lubricant flows through the feed hole from the lubricant accumulation feature to the thrust surface.

Abstract: A shaft assembly includes a gear with a gear bore having a splined bore section adjacent to an oil dam. A shaft includes a first splined end section and a second splined end section, the first splined end section engageable with the splined inner diameter, the shaft having a bore with a bore diameter greater than a diameter of the oil dam, a first set of radial apertures axially inboard of the first splined end section in communication with the shaft inner bore and a second set of radial apertures axially inboard of the second splined end section in communication with the shaft inner bore that altogether provide lubrication of the splined end sections.

Abstract: A scroll compressor is provided that may include a differential pressure hole formed at or in an orbiting scroll that communicates a high pressure part with an intermediate pressure part, a decompression portion formed in the differential pressure hole and having a pin member inserted therein to decompress oil. An inner diameter D1 of the decompression portion may be greater than an outer diameter D2 of the pin member. The decompression portion may include an inlet through which oil may be introduced from the high pressure part into the differential pressure hole, and an outlet through which oil from the differential pressure hole may be discharged into the intermediate pressure part.

Abstract: A rotary compressor including a housing that defines an inlet, a low pressure chamber, an outlet, and a high pressure chamber defining a high pressure lubricant sump. A drive shaft passes through the housing and a compression element is coupled to the drive shaft between the low pressure chamber and the high pressure chamber. A first path connects the high pressure lubricant sump to the low pressure chamber such that lubricant flows through the first path from the high pressure lubricant sump to the low pressure chamber. A low pressure lubricant sump is positioned within the low pressure chamber and includes a movable gate movable from a closed position to an open position in response to a hydrostatic pressure of the lubricant within the low pressure lubricant sump. A second path connects a lubricant separator and the low pressure lubricant sump.

Abstract: A compressor is provided having an accumulator that forms an accumulating chamber in an internal space of a shell of the compressor, reducing a size of the compressor and simplifying an assembly process. A stationary shaft having a refrigerant suction passage may be directly connected to the accumulator to prevent leakage of refrigerant. Further, a center of gravity of the accumulator may correspond to a center of gravity of the compressor to reduce vibration noise of the compressor caused by the accumulator. Furthermore, both ends of the stationary shaft may be supported by a frame to reduce compressor vibration without using a separate bearing. An installation area of the compressor including the accumulator may be minimized to enhance design flexibility of an outdoor device employing the compressor and minimize interference with other components, thereby facilitating installation of the outdoor device.

Abstract: The inside of a sealed container (50) of a horizontal scroll compressor is partitioned by a partition plate (80) into a space in which a compressor mechanism section and an electric motor are contained and into a discharge space (84) in which a discharge pipe (52) and an oil supply pump (70) are contained. An upper communication path (85) and a path guide member (81) are provided in the upper part of the partition plate, and a refrigerant gas passes through the upper communication path (85). The path guide member is located below the discharge pipe (52), is extended to a position near a side surface of the sealed container, and has a path area greater than the path area of the discharge pipe. The construction causes the refrigerant gas to collide with the side surface of the sealed container, promoting separation of oil, and even if the oil is re-dispersed by a gas flow, the construction reduces flow directly leading to the discharge pipe.

Abstract: A compressor is provided in which a rotary member suspended on a stationary member is rotated to compress a refrigerant. The rotary member is suspended on a first stationary member and rotatably supported on a second stationary member spaced apart from the first stationary member, which achieves the structural stability and allows the components to be easily centered and assembled. A refrigerant suction passage and a refrigerant discharge passage are such that the refrigerant may be sucked and discharged without a valve.

Abstract: A scroll compressor including a casing, a scroll compression mechanism that compresses refrigerant, a driving motor that has a driving shaft, an insulator and a stator, and is connected to the scroll compression mechanism through the driving shaft to drive the scroll compression mechanism, a main frame that supports the scroll compression mechanism in the casing, a bearing plate that has a boss portion in which the driving shaft is inserted, and supports the driving shaft of the driving motor in the casing, and a cover that covers the surrounding of the driving shaft between the driving motor and the bearing plate and is formed of an insulating material and provided to the insulator of the driving motor.

Abstract: A scroll compressor including a casing, a scroll compression mechanism that compresses refrigerant, a driving motor that has a driving shaft and is connected to the scroll compression mechanism through the driving shaft to drive the scroll compression mechanism, a main frame that supports the scroll compression mechanism in the casing, a bearing plate that supports the driving shaft of the driving motor in the casing and has an opening portion through which upper and lower spaces above and below the bearing plate intercommunicate with each other, and a first cover that covers the surrounding of the driving shaft between the driving motor and the bearing plate, wherein the cover is configured so as to be passable through the opening portion.

Abstract: The invention relates to a vacuum pump comprising a cup-shaped housing, a rotor eccentrically mounted for rotation in the housing, and a housing cover closing the cup-shaped housing, wherein the rotor has a rotor shaft that passes through the cup-shaped housing and by which the rotor is driven, wherein the rotor shaft is provided with a bore for delivering a lubricant, and a connection nipple is seated in the free end section of the bore.

Abstract: A refrigerant compressor includes: an electric motor including a stator and rotor inside a sealed vessel; a compressing mechanism driven by a crank shaft in the rotor; a lower portion oil pool storing in the sealed vessel lubricating oil that lubricates the compressing mechanism; an upper counterweight on an upper end of the rotor. Refrigerant gas compressed by the compressing mechanism is discharged inside the sealed vessel, passes through a gas channel formed on the electric motor, moves from a lower space to an upper space with respect to the electric motor, and is discharged outside the sealed vessel. An oil return flow channel is formed on the upper end of the rotor toward a lower end from a vicinity of a leading end portion of the upper counterweight in a direction of rotation, and oil expressed in a vicinity of the rotor is directed to the oil return flow channel.

Abstract: A compressor may include a compressor housing, an oil sump, an intake chamber, a compression mechanism, a drive shaft, and a first oil passage. The oil sump may be in communication with the compression mechanism. The intake chamber may be defined within the housing. The drive shaft may include first and second ends with an oil inlet passage located therebetween. The first end may be disposed within the intake chamber and may be drivingly engaged with the compression mechanism. The second end may extend outside of the housing for driven engagement external to the housing. The oil inlet passage may be located within the intake chamber. The first oil passage may be disposed within the housing and in communication with the oil sump and the oil inlet passage.

Abstract: An airtight compressor includes a compression mechanism disposed inside an airtight container in a position below a gas retention space. An oil supply passage supplies oil from an oil reservoir both to the gas retention space (14) and to a sliding portion of the compression mechanism in a compression space. The oil supply passage communicates the gas retention space with a second space located on an opposite side of the piston from the intake chamber. A second channel is a channel that is different from the oil supply passage. The second channel enables a gas medium to flow from the gas retention space to the second space. Preferably, passage resistance when the gas medium flows through the second channel is less than when the gas medium flows through the oil supply passage.

Abstract: A rotary compressor, comprising: a housing (12), comprising a lubricant oil storage part for containing lubricating oil; a compression mechanism (20) disposed in the housing (12); a driving mechanism (30) driving the compression mechanism (20), the driving mechanism (30) comprising a rotation shaft (50), through-holes (54, 56) extending along the axial direction of the rotating shaft (50) are disposed inside the rotating shaft (50), and the rotation shaft (50) is in fluid connection with the lubricating oil storage part via the through-holes (54, 56); and an oil level sensor (120) in fluid connection with the through-holes (54, 56) inside the rotation shaft (50) via a pressurized collection channel (110). Also disclosed is a rotation mechanism, comprising an oil level sensor (120) in fluid connection with the through-holes (54, 56) inside the rotation shaft (50) via the pressurized collection channel (110).

Abstract: A compressor is configured to compress a refrigerant and use a lubricating oil. The compressor includes a compression mechanism configured to compress the refrigerant, a driving shaft configured to rotate about a rotation axis in order to drive the compression mechanism, a slide bearing slidably supporting the driving shaft, a first surface fixed to the driving shaft and intersecting with a line arranged in parallel to the rotation axis, a second surface facially abutted to the first surface, and a recovery space formed in the compressor. The recovery space is configured and arranged to recover the lubricating oil leaking out of bottom ends of sliding surfaces of the slide bearing and the driving shaft. The first surface and the second surface respectively continue to surfaces forming the recovery space.

Abstract: A vacuum pump (10) suitable for mounting at a lower region of an engine such as in the oil sump of an engine. The vacuum pump (10) includes a casing (12) having a cavity (14) containing a movable member (18), wherein the cavity (14) is provided with an inlet (32) and an outlet (34) and the movable member (18) is movable to draw fluid into the cavity (14) through the inlet (32) and out of the cavity (14) through the outlet (34) so as to induce a reduction in pressure at the inlet. The vacuum pump (10) is further provided with an oil feed conduit (84) to supply oil to the cavity (14), the oil feed conduit (84) being provided with a valve (86) to prevent the flow of oil to the cavity (14) during periods when the pump is not operating.

Abstract: In a scroll fluid machine where an orbiting scroll fixed to a pivot shaft eccentrically revolves, a fixed portion is provided on a bottom of a casing, and a swing column is provided between the fixed portion and the orbiting scroll or between the fixed portion and the pivot shaft. The fixed portion withstands the thrust load of the orbiting scroll, which has been transferred by the swing column.

Abstract: A lubricant metering system for a compressor may include a cap, a cap cage, and a shaft. The cap may include an outer surface, a first recess, and a first radial bore extending between the first recess and the outer surface. The cap cage may include a second recess receiving the cap and a lubricant inlet in communication with the first recess via the first radial bore. The shaft may be received within the first recess and may include an axially extending bore and a second radial bore extending between an outer diameter of the shaft and the axially extending bore. The shaft may be mounted for rotation relative to the cap to allow lubricant to flow into the axially extending bore via the first and second radial bores when the second radial bore is aligned with the first radial bore.

Abstract: The present invention relates to a scroll compressor, with an oil-separating drive shaft, that comprises a housing a fixed scroll which is installed inside the housing, a orbiting scroll which orbits around the fixed scroll, and a drive shaft which drives the orbiting scroll. In the orbiting scroll, a discharge hole is formed. A discharge path is formed along the longitudinal direction of the drive shaft so that discharged coolant from the discharge hole flows therethrough. At least, a part of the discharge path is inclined forward from the rotary axis to the exterior. A lubrication hole is formed in the drive shaft that penetrates from the discharge path to the outer surface of the drive shaft.

Abstract: A vane pump 1 has a pump chamber 2A through an axial direction oil supply hole 11a, a diameter direction oil supply hole 11b, and an axial direction oil supply groove 11c of an oil supply passage 11. A gas passage 13 contains a gas groove 13a whose one end is made to communicate with an outer space, the gas groove 13a being formed on an outer peripheral surface of a shaft part 3B of a rotor 3, and the other end of this gas groove is made to intermittently overlappingly communicate with the axial direction oil supply groove 11c by a rotation of the rotor.

Abstract: A vane pump in which a lubricating oil from an oil supply pipe 12 is supplied to a pump chamber 2A through an axial direction oil supply hole 11a of an oil supply passage 11, a diameter direction oil supply hole 11b, and an axial direction oil supply groove 11c. A gas passage 13 includes a diameter direction gas hole 13a and an axial direction gas groove 13b, and the diameter direction gas hole 13a is made to communicate with the axial direction gas groove 13b when the diameter direction oil supply hole 11b is made to communicate with the axial direction oil supply groove 11c.

Abstract: The compressor includes a sealed housing defining a suction volume and a compression volume respectively provided on either side of a body contained in the housing, an oil injection circuit supplied with oil from an oil contained in a casing and adapted for injecting oil into the compression volume, the oil injection circuit comprising an electrovalve including a body attached to the wall of the sealed housing and a core movable under the action of a magnetic fluid between a closing position for injecting oil into the compression volume and an opening position preventing or limiting the injection of oil into the compression volume. The compressor includes a control system for moving the core of the electrovalve between the opening and closing positions based on the compressor speed and/or on the cooling gas discharge temperature.

Abstract: A vertical shaft pumping system includes a hollow shaft with an inner bore, an inlet end and an outlet end, the outlet end with at least one liquid distribution hole. It further includes an impeller positioned at the lower inlet end of the shaft, with a cylindrical base portion with a lower end, a central hole for drawing fluid into the shaft, and a plurality of teeth extending upwards from the cylindrical base portion and extending radially from the central hole to the outer cylindrical circumference for increasing tractive force of liquid in the shaft when the impeller and shaft are rotating; and a motor for rotating the shaft with the impeller to centrifugally pump a liquid vertically in the shaft from the lower inlet end to the upper outlet end.

Abstract: To a hermetic compressor and a refrigeration cycle device having the same, an oil separator for separating oil from a refrigerant discharged from a compression unit is added. Separated oil is recollected into an oil pump driven by a driving motor. Because refrigerant separated from the oil is prevented from being re-introduced into the compressor, a cooling capability of the refrigeration cycle device may be enhanced. Because the oil pump is driven by the driving force of the driving motor, the compressor may have a simplified configuration, and the fabrication costs may be reduced. The oil used for a crankshaft lubrication process is returned to the oil pump by forming an oil pocket between bearing surfaces of a crankshaft and the oil pump, oil may be prevented from back-flowing to the oil separator from the crankshaft. This may allow oil to be smoothly recollected into the oil pump.

Abstract: A fluid machine (101) includes a first compressor (107) and a second compressor (108). The first compressor (107) has a first closed casing (111), a first compression mechanism (102a), an expansion mechanism (104), and a shaft (113). A first oil reservoir (112) is formed in the first closed casing (111). The second compressor (108) has a second closed casing (125) and a second compression mechanism (102b). A second oil reservoir (126) is formed at a bottom portion in the second closed casing (125). The first closed casing (111) and the second closed casing (125) are connected to each other by an oil passage (109) so that a lubricating oil can flow between the first oil reservoir (112) and the second oil reservoir (126). An opening (109a) of the oil passage (109) on a side of the first closed casing (111) is located above the expansion mechanism (104) with respect to the vertical direction.

Abstract: An oil supply groove in communication with a pump room is formed above a bearing of a housing, and an open air groove in communication with atmospheric air is formed at a position rotated around the bearing by 90° from the oil supply groove. In a shank of a rotor, a branch passage branching from an oil passage formed in its axial direction to the diametrical direction of the shank and an open air passage formed in the direction perpendicular to the branch passage are formed. The branch passage and the oil supply groove communicate with each other while the open air passage and the open air groove are arranged to also communicate with each other.