A magnetic levitation reaction flywheel device

Abstract

The invention discloses a magnetic suspension reaction flywheel device, which can be used as an attitude control execution mechanism of a spacecraft such as a satellite, an earth observation platform, a space telescope and the like, and is mainly composed of a wheel body, a housing, a base, a radial magnetic suspension bearing, an axial passive magnetic suspension bearing, a protective bearing, a position sensor and a motor component. Five-degree-of-freedom noncontact suspension is performed on a flywheel rotor by adopting the magnetic suspension bearings, the flywheel rotor is driven by a motor to rotate around a rotating shaft, a control torque is output, the radial magnetic suspension bearing controls radial translation of the rotor, and the axial magnetic suspension bearing controls radial rotation and axial translation of the rotor. The device is reasonable and compact in layout of each component, reduces the size and the weight, eliminates rotational speed zero crossing friction and mechanical wear of a mechanical bearing flywheel, improves the control precision of the flywheel and prolongs the service life of the flywheel.

Description

technical field [0001] The invention relates to the technical field of flywheel mechanisms, in particular to a magnetic levitation reaction flywheel device, which can be used for attitude control of spacecraft such as satellites, earth observation platforms, and space telescopes. Background technique [0002] Attitude control actuators of spacecraft such as satellites, earth observation platforms, spacecraft, and space telescopes require small size, light weight, long life, low power consumption, and high reliability. At present, the flywheel used as the actuator of the attitude control system of the spacecraft is generally supported by mechanical bearings, which fundamentally limits the increase in the speed of the flywheel. Therefore, in order to achieve the required angular momentum, the weight and volume of the flywheel have to be increased. In addition, mechanical bearings have problems such as mechanical wear, unbalanced vibration, and large zero-crossing friction torq...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing mechanical bearing flywheel and the magnetic suspension flywheel with two radial magnetic suspension bearings axially juxtaposed, and provide a simple structure with small volume, high reliability, light weight and low vibration and noise. , Long-life magnetic levitation reaction flywheel

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