An electric compressor includes a cylindrical housing, a rotary shaft accommodated and rotatably supported in the housing, a compression portion compressing refrigerant gas by rotation of the rotary shaft, a stator accommodated in the housing and fixed to the housing, a rotor accommodated in the housing and fixed on the rotary shaft, and a plurality of guide members disposed between the inner peripheral surface of the housing and an outer peripheral surface of a stator core of the stator. A plurality of recesses is recessed in a radial direction of the rotary shaft on the outer peripheral surface of the stator core of the stator and spaced apart from each other in a peripheral direction of the rotary shaft. The guide members are fitted in the respective recesses with a part of the guide members projecting radially outward beyond the outer peripheral surface of the stator core.

A compressor according to the present invention includes an oil separation mechanism and an oil supply mechanism. The oil separation mechanism includes an oil separation chamber and an oil drain path. The oil supply mechanism includes an oil supply port. The oil drain path includes a first flow path formed by penetrating a second partition of a housing and configured to open toward a first partition of a housing from the oil separation chamber, and a second flow path recessed in at least one of the first partition and the second partition and formed by the cooperation of the first partition and the second partition so as to get communicated with the first flow path. An outlet of the second flow path is located at a higher level in a vertical direction than an inlet of the second flow path while avoiding a direction facing the oil supply port.

An electric compressor includes a housing, a rotary shaft, a compression portion compressing refrigerant gas, a stator, a rotor, and guide members disposed between the housing and the stator and spaced away from each other in a peripheral direction of the rotary shaft. The guide members include an engagement portion projecting in a radially outward direction of the rotary shaft. The housing has in an inner peripheral surface thereof an engagement hole to receive the engagement portion. An electric compressor includes a housing, a rotary shaft, a compression portion compressing refrigerant gas, a stator, a rotor, and guide members disposed between the housing and the stator and spaced away from each other in a peripheral direction of the rotary shaft. An engagement projection is formed projecting radially inwardly from the inner peripheral surface of the housing. The guide members include an engagement hole to receive the engagement projection.

An electric compressor includes a housing, a rotary shaft, a compression portion compressing refrigerant gas, a stator, a rotor, and guide members disposed between the housing and the stator and spaced away from each other in a peripheral direction of the rotary shaft. The guide members include an engagement portion projecting in a radially outward direction of the rotary shaft. The housing has in an inner peripheral surface thereof an engagement hole to receive the engagement portion. An electric compressor includes a housing, a rotary shaft, a compression portion compressing refrigerant gas, a stator, a rotor, and guide members disposed between the housing and the stator and spaced away from each other in a peripheral direction of the rotary shaft. An engagement projection is formed projecting radially inwardly from the inner peripheral surface of the housing. The guide members include an engagement hole to receive the engagement projection.

A housing for a rotary vane pump includes a suction flange and a discharge flange having a multi-angular cross-section with at least two sides extending parallel to each other, cooling ribs provided on an outer surface of the housing, with the number of cooling ribs in the region with a high internal pressure being greater than a number of cooling ribs in the region with a low internal pressure, inlet and outlet, with the inlet cross-section being greater than the outlet cross-section, and connection elements provided on the housing and each having two installation surfaces connected by a connection surface.

A housing for a rotary vane pump includes a suction flange and a discharge flange having a multi-angular cross-section with at least two sides extending parallel to each other, cooling ribs provided on an outer surface of the housing, with the number of cooling ribs in the region with a high internal pressure being greater than a number of cooling ribs in the region with a low internal pressure, inlet and outlet, with the inlet cross-section being greater than the outlet cross-section, and connection elements provided on the housing and each having two installation surfaces connected by a connection surface.

A vacuum generation system, in particular for applications to hybrid-drive motor vehicles, comprises a vacuum pump (10) arranged to be independently driven by either an internal combustion engine (1 1) or an electric motor (12) depending on the vacuum conditions in utilizing devices (15) and the operating conditions of the internal combustion engine. A pump for use in such a system and a method of vacuum generation by using the system are also provided.

The present disclosure provides a pumping assembly, a compressor and air conditioning equipment. The pumping assembly includes a first structural body, a rolling bearing assembly, a second structural body, a third structural body and a main shaft passing through the first structural body, the rolling bearing assembly, the second structural body and the third structural body. The pumping assembly includes: a first lubricating oil path passing through a second structural part, the sliding sheet backpressure cavity, a third structural part, a second structural part and a rolling body of the rolling bearing assembly; a second lubricating oil path passing through the sliding sheet backpressure cavity and a first pressure relieving groove of the first structural body; and a third lubricating oil path passing through the sliding sheet backpressure cavity, the first structural part and the rolling body of the rolling bearing assembly.

The present disclosure provides a pumping assembly, a compressor and air conditioning equipment. The pumping assembly includes a first structural body, a rolling bearing assembly, a second structural body, a third structural body and a main shaft passing through the first structural body, the rolling bearing assembly, the second structural body and the third structural body. The pumping assembly includes: a first lubricating oil path passing through a second structural part, the sliding sheet backpressure cavity, a third structural part, a second structural part and a rolling body of the rolling bearing assembly; a second lubricating oil path passing through the sliding sheet backpressure cavity and a first pressure relieving groove of the first structural body; and a third lubricating oil path passing through the sliding sheet backpressure cavity, the first structural part and the rolling body of the rolling bearing assembly.

A vane rotary compressor has a cylinder. A main bearing and a sub bearing are coupled to the cylinder forming a compression space. The main and sub bearing each have a back pressure pocket on a surface facing the cylinder. The main bearing and the sub bearing radially support a rotation shaft. A roller coupled to the shaft is disposed within the compression space. The roller has circumferentially spaced vane slots, each vane slot extending from an open end on an outer circumferential surface of the roller to a back pressure chamber disposed within the roller at an opposite end of each vane slot. A plurality of vanes slide within the vane slots and divide the compression space into compression chambers. At least one of the back pressure chambers in the vane slots fluidly communicates with at least one of the back pressure pockets in the main and sub bearings.