A two-wheel air cycle machine includes a tie rod defining an axis, a turbine mounted on the tie rod, and a compressor mounted on the tie rod and having a rotor portion and a disk portion with at least one aperture. The air cycle machine further includes a compressor inlet fluidly connecting the compressor and an inlet air source, at least one thrust bearing disposed between the turbine and the compressor, and a compressor end shaft coaxial with the tie rod and abutting the compressor disk portion. The compressor end shaft includes a radially-extending seal disk portion and an axially-extending shaft portion having at least one shaft aperture. The at least one disk aperture and the at least one shaft aperture are fluidly connected by a compressor disk cavity defined by a gap between the tie rod and the compressor disk portion. The at least one disk aperture, the compressor disk cavity, and the at least one shaft aperture at least partially define a compressor inlet flow path.

Disclosed is a high-speed dual turbo machine enabling cooling thermal equilibrium and, more particularly, to a high-speed dual turbo machine enabling cooling thermal equilibrium, the high-speed dual turbo machine maximizing the cooling efficiency thereof by compressing and discharging external air suctioned therein at both ends, cooling an air compressor in a suction air-cooling method, decreasing a flow path of air for cooling the inside of the dual turbo machine and the air compressor, and optimizing the flow path.

Accordingly, the present invention uses the suction air-cooling method and guides the flow of air for cooling the turbo machine through a specific path, so that it maximizes the efficiency and durability of the turbo machine, the cost reduction owing to the structural simplification of the turbo machine, and the easiness of maintenance by preventing an increase in temperature of the inside of the turbomachine casing (100) and the air compressor (200).

A compressor having a housing and a rotor, the rotor having an impeller at least on one side; a compressor chamber being formed between the impeller and the housing, the rotor being rotationally mounted, an annular sealing channel being formed between the rotor and the housing, the sealing channel being routed from the compressor chamber to a zone having a lower pressure; a throttling section being provided in the sealing channel; the sealing section being configured in closer proximity to the low-pressure zone than to the compression chamber.

The present invention relates to a blower unit of an air conditioner for a vehicle, which can enhance air-conditioning performance through uniform upper and lower pressure control since compensating and supplementing different air resistances between an upper scroll case and a lower scroll case. The blower unit of the two-layered air conditioner for a vehicle, which separates and blows indoor air and outdoor air, includes: a first scroll in which a first blower wheel is disposed and a first air passageway is formed; and a second scroll arranged below the first scroll, and having a second blower wheel and a second air passageway, wherein a diameter of the second blower wheel and a diameter of the first blower wheel are different from each other.

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 fluid machine includes a housing, a rotating member, and a motor. Part of fluid compressed by a compressor impeller is introduced into a motor accommodation space through an inlet-side flow passage that has an inlet-side fixed throttle, and is discharged from the motor accommodation space through an outlet-side flow passage that has an outlet-side fixed throttle. The outlet-side flow passage includes a connection part connecting to the motor accommodation space. The connection part is formed separately from a clearance between a second partition wall and a shaft, and is located opposite to a connection part of the inlet-side flow passage connecting to the motor accommodation space across the motor in an axial direction of the shaft. The inlet-side fixed throttle and the outlet-side fixed throttle are configured such that pressure in the motor accommodation space is higher than pressure in a turbine-wheel back pressure region.

A foil bearing assembly includes a cylindrical body that defines a cooling fluid passage between a radial outer surface and a radial inner surface of the cylindrical body. The foil bearing assembly includes a foil bearing retained within the cylindrical body and in thermal communication with the radial inner surface of the cylindrical body. The foil bearing assembly is connectable to a bearing housing such that intake and outlet ports of the foil bearing assembly are connected in fluid communication with a coolant inlet passage and a coolant outlet passage defined by the bearing housing. The foil bearing assembly is interchangeable with a second foil bearing assembly having at least one of a cooling fluid passage, a foil bearing, and a cylindrical body inner diameter different than the corresponding cooling fluid passage, the foil bearing, and the cylindrical body inner diameter of the first foil bearing assembly.

An electrically driven compressor includes a rotating shaft, a pair of impellers mounted to the rotating shaft, an electric motor arranged between the individual impellers of the pair of impellers and configured to rotate the rotating shaft, primary bearings, one of which is arranged between one of the pair of impellers and the electric motor, the other of which is arranged between the other of the pair of impellers and the electric motor, the primary bearings being configured to rotatably support the rotating shaft, and a secondary bearing arranged on the side of an end of the rotating shaft relative to the primary bearing in a state where the secondary bearing has a gap with respect to a circumferential surface of the rotating shaft and is configured to be brought into contact with the rotating shaft and rotatably support the rotating shaft when whirling vibration occurs in the rotating shaft.

A centrifugal blower apparatus includes a scroll-shaped housing with first and second air inlets which open to a blower chamber that is in fluid communication with an air outlet. The blower includes a motor to drive impellers, wherein the motor is secured to a frame coupled within the housing in a manner to substantially enhance aerodynamic performance of the blower.

A flow machine includes a rotor rotatably arranged about an axis of rotation in a rotor space of a housing. For energy exchange between a flow energy of a flowing fluid and a mechanical rotational energy, the fluid can be supplied to the housing of the flow machine in so as to bring the fluid into flowing contact with the rotor for the energy exchange and can be led out of the housing of the flow machine. A flow guiding element running about the axis of rotation in a peripheral direction of the rotor is disposed in the rotor space between an inner wall of the rotor space and the rotor in such a way that the rotor is surrounded by the flow guiding element over a predeterminable axial width.