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.

An electric compressor comprising: an electric motor; a rotation shaft configured to be driven by the electric motor; two impellers respectively provided to both ends of the rotation shaft; two housings that respectively contain the two impellers; and an intake manifold pipe configured to branch off from one intake pipe to supply air to each of the two housings. Each of the two housings includes an intake port which opens in a direction intersecting the axial direction of the rotation shaft and to which the intake manifold pipe is connected.

A centrifugal rotating machine includes a rotor in which impellers are attached to the axial ends of a rotating shaft that extends in the axial direction, said impellers rotating in a rotating direction around the rotating shaft so as to draw in fluid from an intake side in the axial direction and discharge fluid from the outer side thereof in the radial direction. According to this device for measuring dynamic characteristics of said centrifugal rotating machine, a cover for covering an impeller is attached to a region of the impeller other than an intake opening on the intake side thereof, and a magnetic force generator for vibrating the impeller by magnetic force is disposed so as to face the cover.

Methods and systems are provided for a turbocharger of an engine. In one example, a method may include balancing a pressure differential between compressor wheels of the turbocharger.

The present invention relates to a direct drive type dual turbo blower cooling structure and, more particularly, to a direct drive type dual turbo blower cooling structure in which a plurality of hole portions for cooling a stator and a plurality of hole portions for cooling a coil portion, a bearing housing, and a rotor are formed along the inner diameter of a motor casing; impellers are disposed on both sides thereof, such that a flow rate is doubled; and an air cooling system capable of achieving thermal balance through the plurality of hole portions is implemented at the time of operation of a cooling fan which provides an air cooling system instead of a conventional water cooling system. As such, it is possible to simplify the mechanical structure and reduce manufacturing time and costs because the pump, heat exchanger, water tank, pipes, etc. required for a water cooling system are unnecessary.

A turbo machine system having an intake structure for air inflow and a cooling structure for a driving motor, and including a driving unit having a rotor and a stator, a compression unit having an impeller that rotates in conjunction with the rotor, guide piping that guides driving unit cooling fluid that flows into the driving unit and is discharged to the outside through the inside of the driving unit and into the compression unit, and external fluid inflow piping that is provided on one side of the guide piping and is provided to communicate with the guide piping, the external fluid inflow piping guiding the external fluid by the differential pressure between the end of the external fluid inflow piping and the inside of the guide piping so as to flow into the guide piping.

A forward curved blower wheel has fan blades having relatively small leading edge blades angles and a relatively lengthy mean camber lines. The blower wheel also comprises leading edge notches adjacent its blower wheel inlet. The leading edge notches eliminate buffeting that would occur with such blades if such notches were not present.

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 two-sided compressor wheel of a fluid compression device includes a first wheel part and a second wheel part. The first wheel part has a plurality of first blades. A first through hole is formed on the first wheel part along a rotation axis, and a first cavity is formed at a bottom of the first wheel part. The second wheel part has a plurality of second blades. A second through hole is formed on the second wheel part along the rotation axis, and communicated with the first through hole. Wherein, the bottom of the first wheel part is connected to a bottom of the second wheel part.

An auxiliary power unit may comprise a twin centrifugal compressor including a first blade. A turbine may be disposed aft of the twin centrifugal compressor. The turbine may include a second blade. The first blade comprises a first material and the second blade comprises a second material. The first material may the same as the second material. The twin centrifugal compressor may include forward centrifugal compressor and an aft centrifugal compressor disposed aft of the forward centrifugal compressor.