Abstract: A compressor may include a compression mechanism and an oil pump. The compression mechanism is configured to compress a working fluid. The oil pump may be defined by a driveshaft and a bearing. The driveshaft is drivingly connected to the compression mechanism and includes a lubricant passage. The bearing receives a portion of the driveshaft and includes a bearing surface that rotatably supports the driveshaft. The bearing includes a pump cavity surface that is spaced apart from the driveshaft and cooperates with a diametrical surface of the driveshaft to define a pump cavity that extends around the diametrical surface of the driveshaft. The bearing includes an inlet passage and an outlet passage. The inlet passage receives oil from an oil sump and provides oil to the pump cavity. The outlet passage receives oil from the pump cavity and provides oil to the lubricant passage of the driveshaft.

Abstract: A rotor assembly, a compressor and an air conditioner are provided. The rotor assembly includes a first rotation shaft and a first rotor rotatably arranged on the first rotation shaft. The first rotor includes a plurality of first screw blades, and a first tooth slot is formed between two adjacent first screw blades; a suction end of the first rotor has at least one oil slinger slot, to allow a lubricant to enter the first tooth slot through the at least one oil slinger slot. It is ensured that the lubricant can fully lubricate and seal the first tooth slot, so that the compressor can run more smoothly, reduce wear of screw blades and improve the service life of the compressor.

Abstract: A compressor for compressing a refrigerant is described. The compressor comprises a case having at least one curved portion and at least one opening, wherein the opening is located in the at least one curved portion, an electrical terminal arranged within the at least one opening and fixed to the case, wherein the at least one opening is an elliptical opening. Also, an electrical terminal for use with a compressor is described.

Abstract: The present disclosure relates to a cooling module in which a plurality of cooling water outlets through which cooling water is discharged are formed in an outer housing, an inner housing into which a first screw and a second screw are inserted inside the outer housing, and a communication hole formed in the inner housing communicates with a plurality of cooling water outlets, in which a cooling module or a cooling water system including a plurality cooling water outlets formed in one screw pump is simple, reduces the number of parts, and simplifies a package.

Abstract: A positive displacement roots blower can include a housing having an inlet structured to receive an incoming flow of a fluid, an outlet structured to receive an outgoing flow of the fluid, and a passage. The positive displacement roots blower can also include a pair of intermeshed rotating members supported for complementary rotation within the housing, where the rotating members and the housing form respective operating volumes there between which rotate with the rotating members. Each of the respective operating volumes has the following regions: (1) open to inlet/closed to outlet; (2) closed to inlet/closed to outlet; and (3) closed to inlet/open to outlet. The passage includes a restriction and connects to at least one of the operating volumes when the at least one of the respective operating volumes is in region (2). The restriction can be a venturi feedback connecting to the outlet.

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

Abstract: A screw compressor includes an outlet housing. The outlet housing includes a passage that is configured to communicate compressed fluid from a screw rotor to a discharge. A removable cover plate is configured to cover a portion of the passage. A method of varying a volume index for a screw compressor is also disclosed.

Abstract: Dual slide valve assemblies having volume slide valve members that are self-positioning. The slide valve assemblies include a self-positioning volume slide valve mechanism that automatically slidably adjusts to control compressor volume ratio and power input to the compressor. The slide valve assemblies also include a capacity slide valve mechanism that is slidably movable to control compressor capacity.

Abstract: A scroll pump (100, 200) comprising a first scroll comprising a first spiral wall (124, 224); a second scroll comprising a second spiral wall (134, 234), the second spiral wall being intermeshed with the first spiral wall; and a pad (180, 280) formed from a different material to the first and second scrolls, the pad being located between the first and second scrolls radially inwards or outwards of the first and second spiral walls.

Abstract: A sheet-shaped check valve which opens and closes the injection passage is placed in the check valve chamber, an injection discharge passage portion connected to the compression chamber of the injection passage and the check valve chamber open from an outer surface of the fixed scroll, a lid body is attached to openings of the injection discharge passage and the check valve chamber such that the check valve is sandwiched between the openings and the lid body, and the injection discharge passage and the check valve chamber are hermetically closed, thereby forming the injection passage. According to this, it is possible to provide a reliable, efficient and inexpensive compressor with an injection mechanism.

Abstract: A rotary compressor is provided that may include a casing, a cylinder having an inner circumferential surface in an annular shape, a roller rotatably disposed in a compression space of the cylinder, a rotational shaft coupled to an inner circumference of the roller, main and sub bearings defining surfaces of the compression space, and a sub bearing cover coupled to the sub bearing to cover one end of the sub bearing and defining a discharge chamber with the sub bearing to communicate with the compression space so as to accommodate compressed refrigerant to be discharged. The sub bearing or the sub bearing cover may include a first barrier rib that protrudes from a surface thereof located inside of the discharge chamber. The first barrier rib may be spaced apart from a surface opposite to the surface within the discharge chamber by a predetermined distance.

Abstract: In a screw compressor, a lobe of a lobe profile of a female rotor includes: a first contour line defining a leading flank; a second contour line defining a trailing flank; and a third contour line defining a lobe tip having both endpoints at which the female has the maximum radius. In the lobe profile, when a first angle formed by two line segments linking a second rotation center as a vertex and both ends of the first contour line, a second angle formed by two line segments linking the second rotation center and both ends of the second contour line, and a third angle formed by two line segments linking the second rotation center and both ends of the third contour line, the third angle is greater on the delivery side in the axial direction, and the first angle is smaller on the delivery side in the axial direction.

Abstract: A rotary compressor includes a compressor housing that is provided with a refrigerant discharge portion and a refrigerant suction portion, and an accumulator that is fixed to the outer peripheral surface of the compressor housing and connected to the suction portion. The accumulator has a cylindrical body portion, which is formed of a resin material, an upper portion, which is formed of a metal material and closes an upper end of the body portion, and a lower portion, which is formed of a metal material and closes a lower end of the body portion, the upper portion is joined to the upper end of the body portion, and the lower portion is joined to the lower end of the body portion.

Abstract: A drivetrain component including a first gear positioned on a first shaft configured to receive torque from a power source, a second gear positioned on a second shaft, and a housing partially surrounding the first and second gears. The second gear is engaged with the first gear transmitting torque from the first shaft to the second shaft. The second shaft is configured to transfer torque received from the first shaft to an additional drivetrain component. The housing includes an inlet and an outlet. Rotation of the first and second gears transfers fluid from the inlet to the outlet.

Abstract: A scroll compressor including a fixed scroll including a fixed wrap, an orbiting scroll including an orbiting wrap facing the fixed scroll to form a compression chamber together with the fixed wrap, and a first receiving groove formed on a second surface, opposite to the orbiting wrap, a frame including a second receiving groove formed on a surface facing the second surface of the orbiting scroll and forming a ring-shaped chamber disposed inside the frame and between the second surface and the surface of the frame, a guide ring disposed in the ring-shaped chamber, and a plurality of roller bearings each including an inner ring fixed to the guide ring, wherein some of the roller bearings are disposed in the first receiving groove and others are disposed in the second receiving groove, and the guide ring and the plurality of roller bearings prevent the orbiting scroll from rotating.

Abstract: A liquid-supply-type screw compressor can suppress a rise in temperature of a liquid while reducing work for stirring the liquid. The compressor has male and female rotors, male- and female-rotor-side working chambers formed at grooves of the male and female rotors, respectively. The compressor also has a liquid supply nozzle arranged on one side in the rotor axial direction which is a low-pressure side of an intersection at which a high-pressure-side cusp intersects a ridge line of a trailing lobe tip of the female rotor that defines a female-rotor-side working chamber, the nozzle supplying liquid to the male-rotor-side working chamber; and a liquid-supply nozzle arranged on the other side in the rotor axial direction which is a high-pressure side of the intersection, and supplies the liquid to the male-rotor-side working chamber, and the liquid supply amount of the nozzle is made greater than the amount of the other liquid-supply nozzle.

Abstract: An electric pump includes a motor unit rotationally driving a drive shaft, and a pump unit. The pump unit includes a pump rotor that sends the fluid by a driving force of the driving shaft, and a pump housing that covers at least one side of the pump rotor. The pump housing includes an attachment surface extending in the axial direction and in contact with an attached body, first and second flow paths respectively on the suction side and the discharge side, and a partition wall positioned between pump-side openings of the first flow path and the second flow path facing the pump rotor, and extends in a direction along the attachment surface, and locations of attachment-side openings of the first flow path and the second flow path on the attachment surface are displaced from each other on the attachment surface in the axial direction.

Abstract: A rotor unit for an eccentric screw pump, comprising a drive shaft which is drivable by means of a drive element of the eccentric screw pump, a helical rotor, and a flex shaft connecting the drive shaft to the rotor, wherein the flex shaft is at least in part accommodated within in the drive shaft, and wherein between the flex shaft and the drive shaft a gap extending around the flex shaft is provided, which allows for a radial movement of the flex shaft within the drive shaft.

Abstract: A sealing assembly for a progressive cavity pump and a progressive cavity pump assembly having a retaining sleeve, a ring, and an elastic diaphragm terminating in a first end of the diaphragm in a first opening, and in a second end of the diaphragm, opposite the first end, in a second opening larger than the first opening. The second opening is held in contact with the retaining sleeve by the ring, and the first opening is configured to grip a rotor of the progressive cavity pump, and the ring is configured to hold the second opening fixed with respect to a stator of the progressive cavity pump.

Abstract: A rotary compressor is provided that may include a cylinder having an inner peripheral surface; a roller; and a plurality of vanes slidably inserted into the plurality of vane slots to rotate together with the roller, front end surfaces of which come into contact with the inner peripheral surface of the cylinder due to the back pressure to partition the compression space into a plurality of compression chambers. The cylinder may further include a suction flow path for refrigerant that may include a suction port that communicates with the compression space to suction the refrigerant in a lateral direction, and a suction passage disposed in a direction that crosses the suction port to provide communication between the compression space and the suction port.