Abstract: A pump and purge valve configuration may include an inlet, an outlet arranged downstream of the inlet and defining a portion of an operational fluid pathway, and a pump mechanism arranged along the operational fluid pathway between the inlet and the outlet. The pump and purge valve configuration may also include a purging fluid pathway having a purge inlet in fluid communication with the operational fluid pathway at a point downstream of the pump. The purging fluid pathway may extend from the purge inlet to a relief point. The pump and purge valve configuration may also include a purge valve arranged along the purging fluid pathway. The purge valve may be configured to remain open unless a triggering fluid pressure develops in the pump mechanism.

Abstract: A scroll compressor and an air conditioning system are provided. The scroll compressor has a housing, a compression mechanism portion, a main frame, a motor, a crankshaft, a main balancing block and an exhaust pipe. In a radial direction of the housing, the exhaust pipe extends into the housing at a depth W, and an outer peripheral wall of the main balancing block is located at a distance L from an inner wall of the housing, where 0.47?W/L?0.93. In this way, a part of a high-pressure oil-gas mixture generated by the compression mechanism portion is discharged through cyclone separation of the main balancing block and mechanical separation of the housing; and the other part of the high-pressure oil-gas mixture flows into an axial channel to achieve oil and gas separation while cooling the motor, and is subsequently discharged.

Abstract: A rotary compressor is disclosed. The rotary compressor may include a casing, a cylinder, main and sub bearings, a rotational shaft, a roller, at least one vane, and a vane support portion that axially supports the at least one vane formed on a bearing surface to extend along a reciprocating direction of the at least one vane from an inner circumferential surface of at least one back pressure pocket at an end of circumferential ends of the at least one back pressure pocket, adjacent to a contact point, and/or protrude axially from the inner circumferential surface of the at least one back pressure pocket and extend in a circumferential direction. This may secure a wide axial support area for a rear end of the at least one vane passing the contact point and/or near the contact point, to suppress or prevent axial tilting of the at least one vane, thereby reducing friction loss, wear, and vibration noise due to the axial tilting of the at least one vane during operation of the compressor.

Abstract: A scroll compressor including a shaft configured to be rotated by a drive source; an eccentric bush having a recess portion into which the shaft is inserted, an eccentric portion eccentric to the shaft, and a balance weight for balancing a rotation; an orbiting scroll configured to be orbited by the eccentric portion; and a fixed scroll configured to be engaged with the orbiting scroll, and a rotational clearance is formed between an outer peripheral surface of the shaft and an inner peripheral surface of the recess portion, and the eccentric bush is formed to be capable of performing a swing motion relative to the shaft in a range of the rotational clearance based on a drive pin configured to connect the shaft and the eccentric bush, and an adjusting mechanism configured to reduce the swing motion of the eccentric bush is disposed between the shaft and the eccentric bush.

Abstract: A block sealing of a rotary combustion engine having a rotating block with radially located cylinders and pistons and an outside stationary case is disclosed. Transverse and/or lateral sealings located in the stationary case fit tight to an outer surface of the block. In circular grooves, a lateral sealing of radius sealing strips with springs situated between adjacent transverse sealing strips placed in transverse grooves is located. Couplings with notches and pressure springs are located in bores of the stationary case for inserting radius sealing strips and transverse sealing strips. The radius sealing strip is provided with a cut-out for interlocking of a stop connected with the stationary case. In the side of the radius sealing strip, a longitudinal groove in which a flexible sealing element and/or transverse sealing strip is made, and at its side, it is provided with a groove in which another flexible sealing element is located.

Abstract: Disclosed is a hub and a bearing which cooperate to hold a shaft in steady axial alignment with a rotor. In a preferred embodiment, the shaft is coupled to the rotor of a fluid gear pump. The gear pump is located in a pump assembly between a front cover and a rear casing. A hub receiving pocket is formed in the front cover, and the hub is connected to the front cover for receipt within the hub receiving pocket. The bearing is surrounded by the hub such that the shaft runs through the bearing to be coupled to the rotor of the gear pump. A pair of high pressure seals are located within the hub at which to surround the shaft and prevent leakage. The bearing being surrounded by the hub stabilizes the shaft to minimize wobbling in response to axial and radial loads to which the shaft is subjected while rotating.

Abstract: An apparatus has a housing having a prismatic interior chamber with a base of a shape of two partially overlapping circles; a first rotor and a second rotor rotatably fit in the prismatic interior chamber. The first rotor and the second rotor are configured to rotate in the same direction. The first rotor and the second rotor are prismatic in shape and the base of the first rotor has a first circular arc and a second circular arc. The first circular arc and the second circular arc are concentric. The first circular arc has a smaller radius than the second circular arc. The first circular arc and the second circular arc have the same central angle. The apparatus may function as a compressor or a pump.

Abstract: An eccentric screw pump with a rotor, which forms a conveyor screw, and a stator, which forms a screw thread and in which the rotor circulates during a conveying operation. The stator includes a single-part or multipart stator housing, in which a stator lining made of an elastomer material is located, said lining forming the screw thread. The stator lining forms a projection at least on one side in the direction along the pump longitudinal axis, said projection protruding from the stator housing such that a free force introduction surface is formed. A force can be applied via the free force introduction surface, said force compressing the stator lining into the stator housing so that the stator lining is transversely elongated in the stator housing, leading to a constriction of the screw thread. The projection can be surrounded by a mobile support tube which is moved relative to the stator housing in the direction along the longitudinal axis of the stator housing for compression purposes.

Abstract: A screw compressor and a compact variable volume index valve therefore are provided. The compact variable volume index valve includes a linear valve member positioned adjacent a compression chamber outlet end of a compression chamber of the screw compressor, an actuator structure coupled to the liner valve member and oriented to move the linear valve member radially along the compression: chamber outlet end of the compression chamber to adjust a radial location where gas exits the compression chamber, wherein the actuator structure is coupled to a shutter of a spiral valve of the screw compressor such that the actuator structure moves the liner valve based on a position of the spiral valve of the screw compressor.

Abstract: An eccentric screw pump with a rotor (2) and with a rotationally fixed stator (6; 6?) surrounding the rotor (2). The rotationally fixed stator includes at least one elastomeric portion, wherein a pressure chamber (16) is arranged on this elastomeric portion of the stator (6; 6?) at a side facing away from the rotor (2). The pressure chamber (16) is connected to a pressure region of the eccentric screw pump such that the at least one elastomeric portion of the stator (6; 6?) is subjected to a pressure produced by the eccentric screw pump.

Abstract: An electric compressor includes a housing, refrigerant inlet port, a refrigerant outlet port, an inverter section, a motor section, a compression device and a front cover. The housing defines an intake volume and a discharge volume. The refrigerant inlet port is coupled to the housing and is configured to introduce the refrigerant to the intake volume. The compression device is a scroll-type compression device having an orbiting scroll and configured to compress the refrigerant. The refrigerant outlet port is coupled to the housing and is configured to allow compressed refrigerant to exit the scroll-type electric compressor from the discharge volume. The electric compressor further including an isolation and constraint system to isolate the housing from the orbiting scroll.

Abstract: A filter and throttle unit for a scroll compressor. The filter and throttle unit includes a housing which has housing walls, an opening which acts as a throttle, and a filter element which is arranged within the housing walls of the housing. The opening is arranged in one of the housing walls.

Abstract: A rotary piston compressor/pump/blower includes a housing spatially limiting a working chamber, an intake connection for guiding fluid into the working chamber, a pressure connection for guiding the fluid out of the working chamber, and a rotor assembly having a first rotor rotatably arranged in a first working sub-chamber and a second rotor cooperating with the first rotor and rotatably arranged in a second working sub-chamber. The rotary piston compressor/pump/blower also includes a ventilation channel, formed in the housing and connected to the working chamber via a ventilation channel opening, for the temporally limited introducing of air into the working chamber, wherein the ventilation channel opening is open at least in sections, in particular completely open, in a compression phase.

Abstract: A rotor assembly, a compressor and an air conditioner. The rotor assembly includes a first rotor, including a first working portion and a second working portion coaxially arranged, the first working portion and the second working portion are rotatable about a first axis; the first working portion includes a plurality of first helical blades, with a first blade groove being formed between adjacent two of the plurality of first helical blades; at least one first air pressure groove is provided on a first end face of the first working portion away from the second working portion.

Abstract: Lock protrusions 4s are projectingly provided to a peripheral edge part of an intake opening part 4c of a first case 4a at a plurality of positions. A removal hole 4t whose width becomes narrower from an upstream side to a downstream side in a rotational direction of a centrifugal fan 2 is provided to extend on a radial-direction outer side of each lock protrusion 4s. An inclined surface F is chamfered to continue to an outer-peripheral-side peripheral edge part 4t1 of the removal hole 4t, the peripheral edge part 4t1 facing to an inner wall surface 4a1 of the first case 4a.

Abstract: A system includes a compressor housing having an intake portion and a discharge portion and a rotor disposed in the compressor housing and configured to compress a fluid flowing from the intake portion toward the discharge portion. The rotor includes a body portion and an internal passageway formed within the body portion extending along an axial length of the rotor. The internal passageway is configured to direct a lubricant between the intake portion and the discharge portion of the compressor housing.

Abstract: A rotary pump for delivering fluid includes: a pump housing having a low-pressure inlet and a high-pressure outlet for the fluid to be delivered; and a delivery rotor rotatable about a rotational axis in the pump housing and including a rotor base body and multiple deliverers distributed over the circumference of the rotor base body for delivering fluid from the low-pressure inlet to the high-pressure outlet. When the delivery rotor rotates, the radial and axial outer edges of the deliverers define a delivery region of the pump. The pump includes a flow channeling structure protruding axially into the low-pressure inlet in relation to the rotational axis of the delivery rotor from the pump housing wall in order to influence fluid flowing in the low-pressure inlet. The flow channeling structure arranged axially next to the delivery region and overlaps at least in portions with the delivery region in the radial direction.

Abstract: A rotor housing for an aircraft rotary engine includes a side housing body and a rail. The side housing body extends along an axis between and to an inner side and an outer side. The side housing body forms a fluid cooling passage and a plurality of ribs. The fluid cooling passage extends about the axis at the inner side. The plurality of ribs are coincident with and extend into the fluid cooling passage. The plurality of ribs are distributed about the fluid cooling passage as an array of ribs. The rail is disposed at the plurality of ribs. The rail extends about the fluid cooling passage. The side housing body and the rail form a plurality of fluid cooling channels connected in fluid communication with the fluid cooling passage.

Abstract: An internal gear fluid machine includes a first gearwheel having an external toothing and mounted rotatably about a first axis of rotation, and a second gearwheel having an internal toothing meshing in regions with the external toothing in an engagement region and mounted rotatably about a second axis of rotation different from the first axis of rotation. The internal gear fluid machine additionally includes a filler piece arranged between the first gearwheel and the second gearwheel away from the engagement region, which filler piece bears on one side against the external toothing and on the other side against the internal toothing, in order to divide a fluid space present between the first gearwheel and the second gearwheel into a first fluid chamber and a second fluid chamber.

Abstract: Rotors formed by an additive manufacturing process are presented. In one example, a rotor includes a monolithically formed rotor body and a plurality of helically arranged lobes formed from a first material, wherein each of the plurality of lobes defines an internal cavity between an outer surface and a central aperture.