Air bag type flywheel locking and unlocking device

Abstract

The invention provides an air bag type flywheel locking and unlocking device which is used for locking and unlocking a flywheel rotor. The device comprises a housing, an air bag and an external gas circuit component, wherein the housing is arranged at the outer side of the flywheel rotor; the air bag is arranged in the housing and is arranged at the outer side of the flywheel rotor; the external gas circuit component is arranged outside the housing and passes through the housing to be connected with the inner chamber of the air bag, when the flywheel rotor is locked, the external gas circuit component aerates the inner chamber of the air bag, so that the air bag is expanded, and leans against the inner wall of the housing and the outer side part of the flywheel rotor, and the flywheel rotor is locked by an axial constraint force and a radial constraint force; and when the flywheel rotor is unlocked, the external gas circuit component deflates the inner chamber of the air bag, so that the air bag is contracted, a gap is formed between the flywheel rotor and the housing, and the flywheel rotor resumes a free state along the axial direction and the radial direction to be unlocked. The device is free from electromagnetic interference to a magnetic levitation flywheel, free from impact influence to a system, simple and compact in structure, low in cost, low in power consumption, less in weight, and high in reliability.

Description

technical field [0001] The invention relates to a flywheel locking and unlocking device, in particular to an airbag-type locking and unlocking device for a flywheel of a magnetic suspension bearing. The device locks and unlocks the wheel body of the magnetic suspension flywheel. Background technique [0002] The magnetic levitation flywheel is a new type of actuator for the attitude control system of aerospace vehicles. Compared with the flywheel supported by mechanical bearings, it has obvious advantages in control accuracy, stability and service life. It is an ideal for high-precision earth observation satellite attitude control. executive body. [0003] Since the magnetic levitation flywheel adopts magnetic bearing technology, there is a gap between the stator and the rotor, and the aerospace vehicle will generate severe vibration and shock during launch. The flywheel system has a large vibration load. In order to prevent damage to the flywheel system, an additional lock ...

AI Technical Summary

Problems solved by technology

For the pyrotechnic locking and unlocking device, its locking and unlocking reliability is high, but it can only be used once, so it will increase the complexity and cost of the ground test of the magnetic levitation flywheel, and it will also bring shock and Pollution and other issues, for example, in order to ensure reliable separation of pyrotechnic locking and unlocking devices, the separation force is generally required to be more than 1.2 times the connection force, so separation impact will occur, while pyrotechnic locking and unlocking devices are The gunpowder gas produced by the explosion during the locking and unlocking process will cause pollution problems; for the motor-type locking and unlocking device, the gear transmission pair and the nut and bolt transmission pair are generally used. Due to the existence of various moving parts, the quality There are certain limitations in reliability and reliability; for the electromagnetic locking and unlocking device, its structure is more complicated, the power consumption of electromagnetic locking and unlocking force is high, and it is easy to cause interference to the electromagnetic environment of the magnetic levitation flywheel itself; As far as the existing pneumatic locking and unlocking devices are concerned, there are problems such as complex structure and easy adhesion of the wheel body

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