A supercharger transmission case that includes both small and large impeller shaft bearing bores in a single component to avoid potential misalignment, and to allow the bores to be machined during the same machining setup by the same tool. The supercharger transmission case may be fabricated of low thermal expansion material, such as a hypereutectic metal matrix comprising aluminum and silicon, to further reduce thermal expansion of the transmission case and bearings.

A system for generating air includes: an electromechanical device generating an airflow equipped with an air inlet opening and an outlet; a casing extending between a first end attached to the air inlet opening and a second end located opposite the first end, the casing including two parts together defining a closed recess, each part including a hollow wall defining a channel extending between the two ends of the casing, each channel opening in front of the air inlet opening so that the electromechanical device is supplied with air routed by the channels; and at least one electronic card for power supply or control of the electromechanical device located in the recess of the casing.

A centrifugal compressor (P) is provided with: a casing (10) which forms an impeller inlet flow path (11), an impeller flow path (12), an impeller outlet flow path (13), and a scroll (14); and an impeller (3) which is arranged in the impeller flow path (11), wherein the casing (10) is provided with a casing body (15) and a heat conduction inhibiting part (16) which is disposed to heat conduction paths to the impeller inlet flow path (11) from at least the impeller outlet flow path (13) and the scroll (14) so as to inhibit heat conduction to the impeller inlet flow path (11) from at least the impeller outlet flow path (13) and the scroll (14).

The centrifugal turbo-compressor (2) includes a hermetic casing (3); a drive shaft (6) having a longitudinal axis and rotatably arranged within the hermetic casing (3); a compression stage including an impeller (17) connected to the drive shaft (6); a gas suction inlet (42); and a gas flow path (P) fluidly connected to the gas suction inlet (42) and configured to supply the compression stage with a gas flow. The gas flow path (P) includes a relaxation chamber (46) at least partially surrounding the drive shaft (6), the gas suction inlet (42) emerging substantially radially into the relaxation chamber (46); and a plurality of inlet flow guide channels (51) fluidly connected to the relaxation chamber (46) and angularly distributed around the longitudinal axis of the drive shaft (6), the inlet flow guide channels (51) extending radially towards the drive shaft (6) and being axially offset from the gas suction inlet (42) and the relaxation chamber (46).

A compressor system includes a compressor including a rotary shaft, an impeller, and a casing, a motor including a motor rotor disposed coaxially with the rotary shaft, and a coupling shaft coupling the motor rotor to the rotary shaft. The compressor includes a compressor bearing that rotatably supports the rotary shaft, and a compressor connecting hub that is fixed to the rotary shaft at a position where the compressor connecting hub overlaps the compressor bearing in the axial direction and at a position on an inner side in the radial direction. The coupling shaft is allowed to alleviate misalignment with the compressor connecting hub. The compressor bearing rotatably supports an outer peripheral surface of the compressor connecting hub.

This disclosure relates to a compressor having at least two compression stages. In particular, an exemplary compressor includes a first radial compression stage arranged along an axis, a second radial compression stage arranged along the axis, and a connector fluidly connecting an outlet of the first radial compression stage to an inlet of the second radial compression stage. The connector has a plurality of sections arranged about the axis. The compressor may be a refrigerant compressor used in a heating, ventilation, and air conditioning (HVAC) chiller system.

A compressor includes a housing having an inlet and an outlet and a fluid flow path extending between the inlet and the outlet. An impeller is mounted within the housing and is movable to move a fluid from the inlet along the fluid flow path to the outlet. A plurality of flow interference elements is arranged within the housing at one or more locations along the fluid flow path. When a fluid flows through the fluid flow path in a backwards direction of flow, a disturbance is generated in the fluid adjacent each of the plurality of flow interference elements.

A centrifugal pump assembly includes a pump head, a pump base defining a pump inlet and a pump outlet, a fluid outlet channel from the pump head to the pump outlet, impellers, defining an impeller fluid channel between an impeller inlet and outlet and connected with one of rotor shaft segments including a positive fit coupling for torque transfer between at least two rotor shaft segments, and one or more pump stage housing segments arranged between the pump base and the pump head. The pump stage housing segments have a structure defining a guide passage for receiving pumped fluid from the impeller outlet of the impellers and for guiding pumped fluid to the impeller inlet of another one of the impellers or to the pump head. The pump stage housing segments each have a structure defining at least a part of a wall section of the fluid outlet channel.

A blower has a blower housing of clamshell construction, including two housing members having a scroll back wall molded with radial draft, an impeller and a motor within the housing, and a static tap connected to the housing. The impeller has a backplate with a backplate back surface region of substantially the same radially converging shape as that of a front surface region of the scroll back wall formed by the radial draft, providing a substantially uniform axial gap between the backplate back surface region and the scroll back wall. The impeller has a ring connected by a skirt to the back plate to define a stepped area behind the ring. The impeller includes impeller blades extending forwardly from the impeller backplate and the ring and back fins extending rearwardly from the ring. The blower has a scroll width of about twice an impeller exhaust width.

A rotor shroud for a rotary machine in a cabin air compressor includes a disk portion centered on a central axis of the rotor shroud, a frustoconical portion extending from the disk portion, a flared portion extending from the frustoconical portion, and a variable lattice structure in an interior of the rotor shroud. The variable lattice structure includes a first region of the rotor shroud having a first lattice structure and a second region of the rotor shroud having a second lattice structure. The second lattice structure of the second region is denser than the first lattice structure of the first region. The second region is a deflection region, a stress region, or an energy containment region of the rotor shroud.