摘要:
The invention relates to a wheel hub unit (10) comprising a wheel hub (40), a hydraulic motor (12) and at least one bearing (52a, 52b) for supporting the wheel hub (40) and the hydraulic motor (12). The wheel hub unit (10) comprises a first seal (100) for protecting the at least one bearing (52a, 52b) from hydraulic oil from the hydraulic motor (12).
摘要:
The present invention relates to a flywheel apparatus for energy storage and recovery including a housing within which there is a chamber in which a flywheel on a shaft rotates. The chamber is evacuated to at or near vacuum pressure, so that air resistance-related energy losses of the flywheel as it rotates are reduced. Maintaining near-vacuum pressure within the chamber requires an effective seal between the housing and the shaft. The effective seal must be maintained despite any relative movement (in particular translational movement) of the flywheel and the housing. To this end, the shaft is mounted via a bearing arrangement on a carrier on which is also mounted a sealing arrangement. The carrier is mounted on the housing such that the carrier, the bearing arrangement and the sealing arrangement move substantially together relative to the housing.
摘要:
Provided is an in-wheel motor drive device, including a casing configured to hold a motor part, a speed reduction part, and a wheel bearing part, the motor part including: a stator, which is fixed to the casing; a rotation shaft of a motor, which is rotatably supported on the casing through intermediation of rolling bearings; and a rotor, which is mounted to the rotation shaft of the motor. The rolling bearing has a radial internal clearance of from 8 µm to 25 µm before being mounted into the motor part. The rotation shaft of the motor is rotatably supported on the casing through intermediation of a plurality of rolling bearings. The rotation shaft of the motor and the rolling bearings configured to support the rotation shaft of the motor are fitted to each other by transition fit or interference fit.
摘要:
An object is to provide a rolling bearing device 11 which allows checking if its oil supply unit 13 is functioning properly, under an assembled state without any need for disassembly or communication lines extended to the outside. The device is provided as a combination of a rolling bearing 11 and an oil supply unit 13 which includes at least: a lubrication oil tank 46, a pump 45 which sucks lubrication oil from the lubrication oil tank 46 and discharges the lubrication oil from a discharge port; a driving section 44 which drives the pump 45; and a generator section 41 which supplies the driving section 44 with electric energy. The oil supply unit 13 is attached to a fixed-ring-side member 12b of the rolling bearing 11 or a spacer 16 adjacent to the rolling bearing. The oil supply unit 23 further includes, within itself, a communication unit 49 which transmits operation information of the oil supply unit 23 to an outside.
摘要:
Ausführungsbeispiele betreffen ein Konzept zum Bereitstellen bzw. Nachrüsten einer ringförmigen Anlageschulter in einem zylinderförmigen Lagergehäuse (10) mit einem Gehäuseinnendurchmesser (d i , 10 ). Dazu wird zunächst eine ringförmige Nut (11) auf einer Innenseite des zylinderförmigen Lagergehäuses (10) eingebracht. Danach wird ein erster Ring (12) als Anlageschulter in die ringförmige Nut (11) eingesetzt, wobei der erste Ring (12) einen ersten Ringaußendurchmesser (d a , 12 ) größer als der Gehäuseinnendurchmesser (d i , 10 ) und einen ersten Ringinnendurchmesser (d i , 12 ) kleiner als der Gehäuseinnendurchmesser (d i , 10 ) aufweist.
摘要:
Radial passages (22) that penetrate from the inner diameter side to the outer diameter side of a retainer (8) are provided between inner wall surface portions (14) of a pocket (10) facing each other in an axial direction of the retainer and a rolling element (6) so that the radial passages (22) serve as a grease reservoir as well as a grease passage for allowing the grease adhering to the rolling element (6) to move onto an outer ring raceway surface (4a). The radial passages (22) are made up of arc-shaped spaces (18) between the rolling element (6) and the inner wall surface portions (14) of the inner wall surface of a pocket (10) and segment shaped spaces (20) between the rolling element (6) and arcuate recesses (16) at the four corners of the pocket (10).
摘要:
A centrifugal compressor (1) that includes: an auxiliary bearing (7) which supports a shaft (2), which is supported by a magnetic bearing (6), when the shaft (2) is displaced from a reference position; and a stopper (8) that is provided only for a first auxiliary bearing (7a) among the first auxiliary bearing (7a) and a second auxiliary bearing (7b), that is fixed to the shaft (2), and that restricts a movement of the shaft (2) in both directions in an axial direction by the stopper (8) being brought into contact with the first auxiliary bearing (7a).
摘要:
The invention relates to a wheel hub unit (10) comprising a wheel hub (40), a hydraulic motor (12) and at least one bearing (52a, 52b) for supporting the wheel hub (40) and the hydraulic motor (12). The wheel hub unit (10) comprises a first seal (100) for protecting the at least one bearing (52a, 52b) from hydraulic oil from the hydraulic motor (12).