摘要:
A recirculation pump includes an impeller, a pump motor assembly, and a heater. The pump motor assembly includes a pump housing having a pump cavity and a pump motor arranged in the pump cavity that drives the impeller, the pump housing arranged axially away from the impeller. The heater is disposed on or in the pump housing and spaced apart from the impeller. The heater is configured to increase a temperature of any portion of the fluid that leaks from the impeller into the pump cavity and resides in the pump cavity. The increase in the temperature causes the fluid that resides in the pump cavity to flow toward the impeller and exit the pump cavity.
摘要:
Ein Vakuumgerät, insbesondere eine Vakuumpumpe, umfasst einen schmiermittelfreien Raum und einen ein Schmiermittel enthaltenden Raum sowie eine drehbar gelagerte Welle, die zumindest abschnittsweise in den beiden Räumen angeordnet ist. Zwischen den Räumen ist eine Dichtvorrichtung vorgesehen, durch welche die Welle hindurchtritt und welche ein Rotorelement, das mit der Welle drehfest verbunden ist, und ein Statorelement umfasst, das drehfest zwischen den Räumen angeordnet ist. Zwischen dem ersten Statorelement und dem Rotorelement ist ein erster Spalt mit einer Eintrittsöffnung gebildet, welche zu dem das Schmiermittel enthaltenden Raum offen ist. Der erste Spalt weist gegenüberliegend zu der Eintrittsöffnung eine Austrittsöffnung auf, die mit einem Expansionsraum verbunden ist. Der Expansionsraum weist eine größere Querschnittsfläche als der erste Spalt auf und ist durch Wandabschnitte des Rotorelements und des Statorelements gebildet. Der Expansionsraum steht mit einem Schmiermittelsumpf in Verbindung.
摘要:
An object is to provide a multi-stage electric centrifugal compressor including an electric motor and free from risk of breakdown of an operation control part due to heat generated by low-pressure stage and high-pressure stage compressors. A multi-stage electric centrifugal compressor includes: an electric motor; a pair of centrifugal compressors coupled to either side of the electric motor, the pair of centrifugal compressors comprising a low-pressure stage compressor and a high-pressure stage compressor connected in series; a heat-shielding plate disposed between an end portion on a low-pressure-stage-compressor side of the electric motor and an end portion on a motor-housing side of the low-pressure stage compressor, and configured to shield heat generated by the low-pressure stage compressor; and a bending portion disposed in middle of the heat-shielding plate, and extending along a rotational shaft of the electric motor so as to surround an outer periphery of the rotational shaft. An inner surface of the bending portion faces the rotational shaft via a clearance part, and the bending portion functions as a shaft sealing portion which prevents leakage of intake air from the low-pressure stage compressor.
摘要:
A seal assembly (200; 300; 400; 500A; 500B; 500C; 500D) for a rotatable component (202; 302) having an axis of rotation (203). The seal assembly (200; 300; 400; 500A; 500B; 500C; 500D) may include a first seal (210) mounted to a housing (250) and configured to be in sealing engagement with the rotatable component (202; 302), a second seal (220) mounted to the housing (250; 450) an axial distance apart from the first seal (210) and configured to be in sealing engagement with the rotatable component (202; 302), wherein the axial distance is parallel with the axis of rotation (203), a buffer fluid chamber (230) defined between the first seal (210) and the second seal (220), and a buffer fluid inlet (240; 340) in fluid providing communication with the buffer fluid chamber (230).
摘要:
A turbocharger rotating assembly includes a bearing; a shaft and turbine wheel assembly supported by the bearing; a seal ring disposed about the shaft; and a sleeve that supports the bearing and that includes a compressor end and a turbine end, a bore extending axially from the compressor end to the turbine end, a first counter bore that forms an axial face that axially locates the bearing in the bore, a second counter bore disposed axially between the first counter bore and the turbine end wherein the second counter bore comprises a seal surface that forms a lubricant and exhaust seal with the seal ring disposed about the shaft, and a securing feature to secure the sleeve with respect to a turbocharger housing. Various other examples of devices, assemblies, systems, methods, etc., are also disclosed.
摘要:
The invention relates to an electric compressor (9, 17) comprising a shaft (13) rotated by an electric motor by means of bearings (6), the shaft rotating a compressor wheel (14), the compressor (9) comprising two sealing segments (29a, 29b) mounted around the shaft (13) between the bearings (16) and the compressor wheel (14) and comprising a vent hole (31, 35, 38) for circulation of pollutant flows towards the outside of the compressor, the inlet of which is arranged between the two sealing segments, the vent hole comprising a non-return element (36).
摘要:
A seal mechanism (20A) is disposed on an outer circumferential side of a rotor (2) extending along an axis (O) to perform sealing between the seal mechanism and the outer circumferential surface (2a) of the rotor (2). The seal mechanism (20A) includes a main body portion (21A) having a cylindrical shape, and into which the rotor (2) is inserted; and a plurality of hole portions (22) formed on an inner circumferential surface of the main body portion (21A) to face an outer circumferential surface of the rotor (2). The hole portions (22) are within a range in which a hole depth h is equal to or smaller than a hole diameter d.
摘要:
An object is to provide a multi-stage electric centrifugal compressor including an electric motor and free from risk of breakdown of an operation control part due to heat generated by low-pressure stage and high-pressure stage compressors. A multi-stage electric centrifugal compressor includes: an electric motor; a pair of centrifugal compressors coupled to either side of the electric motor, the pair of centrifugal compressors comprising a low-pressure stage compressor and a high-pressure stage compressor connected in series; a heat-shielding plate disposed between an end portion on a low-pressure-stage-compressor side of the electric motor and an end portion on a motor-housing side of the low-pressure stage compressor, and configured to shield heat generated by the low-pressure stage compressor; and a bending portion disposed in middle of the heat-shielding plate, and extending along a rotational shaft of the electric motor so as to surround an outer periphery of the rotational shaft. An inner surface of the bending portion faces the rotational shaft via a clearance part, and the bending portion functions as a shaft sealing portion which prevents leakage of intake air from the low-pressure stage compressor.
摘要:
A gas turbine engine includes a bearing support positioned fore of a compressor section along a primary flowpath. The bearing support internally includes a fluid reservoir with a reservoir tube, a fluid pump with a fluid pump tube, and a fluid coupler coupling the reservoir tube to the fluid pump tube.