Abstract: 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.

Abstract: A turbine or compressor wheel mounted in a housing. The wheel is carried on two radial bearings both mounted in a wall of the housing. The wall has a venting orifice that is not impeded by moving parts such as bearings. The wall also has a circular seal member extending toward a back-disk of the wheel with only a very small clearance. The seal member is composed of a material significantly softer than the material of the wheel.

Abstract: A fan includes a fan impeller. The fan impeller includes an inner frame, an outer frame and a disturbing structure. The inner frame rotates along a rotation axis. The outer frame is disposed around the inner frame. The blades are disposed between the inner frame and the outer frame and arranged radially. The disturbing structure has a plurality of protrusion columns disposed on the outer frame, and the protrusion columns are arranged surrounding the blades. The protrusion columns are provided to generate vortexes in the flow field for disturbing the flow as to reduce noise, and the wind pressure can be increased to obtain better operating characteristics.

Abstract: A fan impeller includes a hub, a shaft, a metal housing, a magnetic ring and a plurality of blades. The outer periphery of the hub has a curved surface. The shaft is disposed in the hub and connected to the hub. The metal housing has an annular shape and is disposed in the hub. The magnetic ring is disposed at the inner side of the metal housing. The blades are disposed around the outer periphery of the hub.

Abstract: According to the embodiment, in a range from a plane P1 including a runner rotation center axis C and an end point 15E2 of an outlet end 15 of the vane 13, up to a plane P2 corresponding to a position where the plane P1 is moved by an angle, which is determined by dividing 360° by a value that is four times the number of vanes 13, in a runner rotation direction, when respective sections of the vane 13 are taken at a plane including the axis C and radially extending, in at least one section, a tangent T1 on a centerline Cv of the vane 13 passing through an intersection X at which the centerline Cv and a flowing water surface 12f intersect, and a tangent T2 on the flowing water surface 12f passing through the intersection X, define an acute angle on a negative pressure surface.

Abstract: The present invention relates to a disc turbine for converting the energy associated with a fluid into mechanical energy. The turbine (1) comprises a housing and a rotor (4) inside said housing (3) which can rotate with respect to it about a rotation axis (100). The rotor (4) comprises a plurality of disc elements (11A, 11B) coaxial with said axis. The turbine is characterized in that it comprises a distributor (5) with a distribution wall (5A) which at least partially surrounds the discs. Such a wall (5A) is arranged inside said housing (3) so as to define a diffusion chamber (7) with the housing itself, which chamber at least partially surrounds the distribution wall (5A). The latter comprises a plurality of nozzles (6A, 6B, 6C, 66A, 66B, 66C), each of which is provided with an inlet section (61) communicating with said chamber (7), an outlet section (62) adjacent to the discs (11A, 11B), and a converging portion (615) which accelerates said fluid towards said outlet section (62).

Abstract: There is provided a multistage centrifugal fluid machine capable of improving efficiency of an operation for assembling an inner casing to a high pressure side head flange. The multistage centrifugal fluid machine 100 includes a rotor 3 provided with a plurality of impellers (41 to 81) in an axial direction, a cylindrical outer casing 2, and an inner bundle 1 that is fitted with the outer casing 2 to form a flow passage for the working fluid. The inner bundle 1 includes a high pressure side head flange 11, a low pressure side head flange 12, and an inner casing 5 disposed between the high pressure side head flange 11 and the low pressure side head flange 12. The high pressure side head flange 11 and the inner casing 5 are fastened with a first bolt 142 via an elastic body 144.

Abstract: An interface for a gas turbine engine. The interface includes a full-hoop vane ring around the engine axis, the full-hoop vane ring comprises a forward vane rail with a vane ring forward contact surface and a vane ring anti-rotation tab, the vane ring anti-rotation tab engaged with the anti-rotation case slot; and a multiple of BOAS segments around the engine axis, each of the multiple of BOAS segments comprise a BOAS aft engagement feature and a BOAS aft contact surface, the BOAS aft engagement feature engaged with the outer case and the anti-rotation case slot, the BOAS aft contact surface abuts the vane ring forward contact surface.

Abstract: The present disclosure discloses a portable mobile fan, comprising a fan body and fixing devices, the fan body comprises a fan shell, a windshield cover, an impeller, a motor, a circuit board and a switch button; which has large air output, has a fan body with relative position changed by adjusting fixing brackets, can be fixed on different objects, and has strong practicability.

Abstract: A fan noise-lowering structure includes a fan frame main body and a connecting pipe. The fan frame main body has a bottom section and a peripheral wall section; the peripheral wall section is externally located around and forwardly extended normal to the bottom section and internally defines an air-stream passage. Further, the peripheral wall section is formed with a first pipe and a second pipe, which are communicable with the air-stream passage defined in the peripheral wall section. The connecting pipe has two ends respectively connected to the first pipe and the second pipe. With the connecting pipe, air at an air outlet of the air-stream passage having higher pressure is guided to generate swirls, which moves toward an air inlet of the air-stream passage to thereby effectively lower the noise produced by the fan in operating.

Abstract: A disk-shaped fan impeller structure includes a plate body having an inner rim and an outer rim. The inner rim is connected with a hub via multiple connection members. The outer rim extends in a direction away from the hub. The connection members are annularly disposed on outer circumference of the hub at intervals to radially extend toward the inner rim of the plate body. A top face and a bottom face are defined between the inner rim and outer rim. Multiple upper boss bodies are arranged on the top face at intervals. Multiple first gaps are distributed between the upper boss bodies. By means of the boss bodies, the periodical noise problem of the conventional fan impeller can be improved.

Abstract: A fluid turbine apparatus includes a fixed structure and a rotating structure supported by the fixed structure. The rotating structure includes a central shaft, and at least two wings connected to the central shaft. Each of the wings includes a wing frame, at least one door and a respective at least one door stopper. Each of the doors pivots relative to the respective wing frame between closed and open positions. In use, the door located at one side of the central shaft facing a flow of fluid is in the closed position with fluid force transferred to the door, while the door located at the opposite side of the shaft is in the open position with fluid passing through the respective wing frame. The fluid force creates a torque that rotates the central shaft. Apparatuses can extract power from wind or water current.

Abstract: A fan noise-lowering structure includes a fan frame and a connection section. The fan frame has a bottom side and a circumferential wall. The circumferential wall defines an airflow passage. Two ends of the airflow passage respectively have an inlet and an outlet. The connection section is disposed on inner side or outer side of the circumferential wall. The connection section has an internal passage. Two ends of the internal passage respectively have an inlet end and an outlet end. The outlet end is disposed on the inner side of the circumferential wall in connection with the airflow passage near the inlet. The inlet end is disposed on the bottom side in flush with the outlet. The connection section serves to guide the high-pressure air at the outlet to jet to the inlet so as to achieve multiple noise-lowering effects.

Abstract: An air turbine drive spindle capable of suppressing a pressure increase inside a through hole is provided. A spindle includes a rotary shaft and an outer circumferential member (a housing assembly, a cover and a nozzle plate). The rotary shaft is provided with a through hole. The outer circumferential member includes a bearing sleeve configured to surround at least a portion of an outer circumferential surface of the rotary shaft. The outer circumferential member includes a gas supply portion and a gas exhaust hole. The spindle includes a second gas exhaust portion (a first gas exhaust hole and a first gas flow passage). The second gas exhaust portion is independent of the gas exhaust hole and continuous to outside from a gas exhaust space.

Abstract: A portable temperature regulation device includes a wearing body and first and second main bodies rotatably connected to the wearing body. The first and second main bodies each include a first housing in which a first receiving chamber is formed to receive a first fan therein. The first main body further includes a first air passage in communication with the first receiving chamber, a first air outlet communicating the first air passage and outside, an air inlet in communication with the first receiving chamber. The first and second main bodies are rotatably connected to the wearing body by a rotation structure. When it needs to fold for storage, the first and second main bodies can be rotated to a folded state, so as to reduce the size of the portable temperature regulation device for easy storage by a user.

Abstract: An eddy pump impeller includes a hub and a plurality of blades. The hub has a rear surface, and tapers from the rear surface to a front end. The plurality of blades extend from the hub. Each of the plurality of blades has an outer surface essentially parallel to the rotational axis of the hub, inversely tapering from the hub, such that each of the plurality of blades has a width adjacent the hub that is less than a width adjacent the outer surface, and has a front surface tapering in height, such that the plurality of blades is configured to cause an eddy current and cause a fluid stream to be forced to an outside of the impeller.

Abstract: A fan device configured to be assembled to chassis having engagement slot and including casing, fan, clip, handle, and trigger. Casing includes bottom plate, front plate and top plate. Top plate at least partially covers bottom plate and has through hole. Opposite sides of front plate are respectively connected to bottom plate and front plate. Fan is disposed on casing. Clip includes elastic part, engagement part and pressed part. Elastic part has fixed side and movable side that are opposite. Fixed side is disposed on top plate. Movable side is located closer to top plate than fixed side. Engagement part is connected to movable side. Engagement part is disposed through the through hole to be engaged with engagement slot. Pressed part is connected to movable side. Handle is disposed on front plate. Trigger is movably disposed on handle.

Abstract: A centrifugal compressor includes a rotary shaft; a hollow casing; a first-stage inlet guide vane; a first-stage impeller; a diffuser; a return flow channel; return vanes; a second-stage inlet guide vane; and a second-stage impeller. The return vanes are arranged at predetermined intervals in a circumferential direction of the rotary shaft and a vane angle of each return vane is changed in a region from a leading edge, at which the fluid is introduced, to a predetermined position and the vane angle is maintained constant in a region from the predetermined position to a trailing edge, at which the fluid is discharged, in terms of meridian plane distance in a direction from the leading edge to the trailing edge.

Abstract: This fluid machine includes a motor housing, a rotating shaft which is inserted through the motor housing, an impeller which is mounted on a protruding portion of the rotating shaft, and a facing portion which faces the motor housing on a first end side in the axial direction. A first opening is provided on the first end side of the motor housing, a second opening is provided on a second end side of the motor housing, and an in-housing passage fluidly couples the first opening with the second opening. The fluid machine further includes an exhaust passage which is formed between the motor housing and the facing portion and which fluidly couples the first opening with external air, and a rotating blade which is disposed between the first opening and the exhaust passage, wherein the rotating blade is mounted on the rotating shaft and is rotatable with the rotating shaft.

Abstract: An exhaust turbocharger includes an air-guiding section. A spiral channel is formed downstream of a wheel chamber in the air-guiding section. Between the wheel chamber and the spiral channel, a diffuser channel is formed in the air-guiding section. Upstream of the wheel chamber, an inlet channel is formed in the air-guiding section for the inflow of fluid to be compressed. In the inlet channel, a cross-section-changing unit. The cross-section-changing unit comprises an operating element with at least two movable element parts to produce a baffle which can protrude, with the aid of an adjusting unit, into the inlet cross-section rotationally and/or in a translational manner or can be removed from the inlet cross-section. The two element parts are fixedly disposed at one element end jointly in the air-guiding section. A relative movement of the element parts can be brought about in particular in an opposing direction.