A compressor has an axial portion and a centrifugal portion. A disk structure is provided to support the centrifugal portion and is connected to the centrifugal portion with a rabbet joint.

A radial compressor includes a rotor, a housing, and a radial compressor impeller which is rotationally fixed to the rotor. The radial compressor impeller has a wheel disk on which rotor blades are arranged in the circumferential direction, the rotor blades have a leading edge and a trailing edge. The radial compressor includes an impeller hub in the region in front of the leading edge of the rotor blades of the radial compressor impeller, the hub is arranged on the end of the rotor and/or the wheel disk in a concentric and rotationally fixed manner. Rotor blades with leading edges and trailing edges are also arranged on the impeller hub in the circumferential direction.

A compressor wheel of a fluid compression device includes a wheel part, a shaft part and a plurality of connection parts. The wheel part includes a main body formed with a through hole, and a plurality of blades protruded from an outer side of the main body. The shaft part is accommodated in the through hole and configured to connect to a rotor shaft. The plurality of connection parts is connected between an inner side of the main body and the shaft part. Wherein, a fluid passage is formed between the inner side of the main body and the shaft part to allow fluid to flow to a rear side of the compressor wheel from a front side of the compressor wheel via the fluid passage.

An impeller includes a metallic inducer portion and a polymeric exducer portion connected to the metallic inducer portion. The metallic inducer portion includes an inducer hub, inducer blades attached to the inducer hub, and an inducer coupling on an end of the inducer hub. The polymeric exducer portion includes an exducer hub, exducer blades attached to the exducer hub, and an exducer coupling on an end of the exducer hub. The exducer coupling connects to the inducer coupling.

A two-sided turbocharger compressor wheel and a housing forming a diffuser for the compressor. A first side and a second side of the compressor wheel are characterized by different values of a trim and of an annulus area. A first side of the diffuser surrounds the first side of the compressor wheel, and a second side of the diffuser surrounds the second side of the compressor wheel. The first and second sides of the diffuser are characterized by different annulus area ratios. The blades of the first and second sides of the compressor wheel are angularly offset from one another. The compressor wheel is configured for greater flow through the side of the compressor wheel that faces away from a related turbine wheel.

A multi-stage compressor for a turbocharger includes a compressor housing that defines an aperture for receiving a compressor wheel for successively compressing air in first and second stages. First- and second-stage inlets are fluidly connected to the aperture in opposite axial directions, and first- and second-stage volutes extend at least partially annularly therearound so that each volute is configured to receive gas flowing generally radially outward from the compressor wheel. First and second passages fluidly connect the first-stage volute to the second-stage inlet. The passages approach the second-stage inlet from opposite radially inward directions, and are asymmetric with respect to any pair of orthogonal axes having an origin lying on the turbocharger rotary axis as viewed on a transverse cross-section that is normal to the turbocharger axis.

A compressor wheel of a fluid compression device includes a wheel part, a shaft part and a plurality of connection parts. The wheel part includes a main body formed with a through hole, and a plurality of blades protruded from an outer side of the main body. The shaft part is accommodated in the through hole and configured to connect to a rotor shaft. The plurality of connection parts is connected between an inner side of the main body and the shaft part. Wherein, a fluid passage is formed between the inner side of the main body and the shaft part to allow fluid to flow to a rear side of the compressor wheel from a front side of the compressor wheel via the fluid passage.

A compressor assembly of a turbocharger can include a compressor housing that includes a compressor wheel space and a diffuser section that extends from the compressor wheel space to at least one volute; a dual-faced compressor wheel disposed at least in part in the compressor wheel space where the dual-faced compressor wheel includes a first compressor wheel face and a second compressor wheel face oriented back-to-back; and a diffuser section divider disposed at least in part in the diffuser section where the diffuser section divider includes a first side that defines in part a first diffuser that includes a first set of vanes associated with the first compressor wheel face and a second side that defines in part a second diffuser that includes a second set of vanes associated with the second compressor wheel face.

A turbomachine impeller is disclosed, which includes: a hub having a rotation axis; a shroud; a plurality of blades between the hub and the shroud; and a plurality of flow vanes, each flow vane being defined between the hub, the shroud and neighboring blades, each flow vane having a flow vane inlet and a flow vane outlet. Each flow vane extends radially inwardly from the flow vane inlet towards a radially innermost flow vane section, and from the radially innermost flow vane section to a flow vane outlet.

A blower has a centrifugal impeller driven by an electric motor. The centrifugal impeller has a base plate, a cover plate defining an air inlet, a plurality of blades mounted between the base plate and the cover plate, and a reinforcement ring mounted to the cover plate around the air inlet. The cover plate includes an outwardly extending flange at the air inlet. The reinforcement ring has a flange fitted around the flange of the cover plate. Each blade has cover plate mounting portions and base plate mounting portions. The cover plate has blade mounting holes engaged with the cover plate mounting portions. The base plate has blade mounting holes engaged with the base plate mounting portions. The reinforcement ring increases the strength of the cover plate, to avoid breakage under high speed rotation.