A High-speed Rotor Device of Magnetic Suspension Control Moment Gyro

Abstract

The invention discloses a magnetic suspension control moment gyro high-speed rotor device, which comprises a flywheel, a three-degree-of-freedom integrated magnetic bearing, a high-speed motor, a gyro house, a protective bearing, a radial displacement sensor, an axial displacement sensor and an end cover. Among them, flywheel, high-speed motor rotor part, three-degree-of-freedom integrated magnetic bearing rotor part constitute the rotor assembly of the device, gyro room, high-speed motor stator part, three-degree-of-freedom integrated magnetic bearing stator part and end cover form the stator assembly, and the rotor assembly and A high-speed motor is used between the stator components to realize the high-speed rotation of the rotor, which provides angular momentum for the output torque of the gyroscope. The invention realizes the rotor radial and axial non-contact stable suspension through two symmetrically arranged three-degree-of-freedom integrated magnetic bearing supports, which makes the layout of the magnetic bearing support system compact, reduces the volume and weight of the device, and shortens the length of the rotor in the axial direction. The length is beneficial to obtain higher rotor natural frequency and higher speed.

Description

technical field [0001] The invention relates to the technical field of torque control gyroscopes, in particular to a high-speed rotor device for magnetic suspension control torque gyroscopes. Background technique [0002] The control moment gyroscope has the characteristics of large output torque and high control precision, and is an ideal actuator for the attitude stability control of large spacecraft and the flexible attitude adjustment of small and medium-sized agile satellites. Due to the non-contact suspension support of the magnetic suspension bearing, it can overcome the friction and wear caused by the mechanical bearing, reduce the vibration and noise of the system, and does not need lubrication. The advantages of high reliability have obvious technical advantages compared with mechanical torque gyroscopes. In order to realize the stable driving of the high-inertia high-speed rotor around the main shaft, it is necessary to provide the rotation degree of freedom in o...

AI Technical Summary

Problems solved by technology

The existing magnetic levitation control moment gyro high-speed rotor support system usually adopts radial magnetic bearings arranged in pairs to support the two radial translation and rotation of the rotor, and uses axial magnetic bearings arranged in pairs to support the axial translation of the rotor. The disadvantage of the support method is that the radial magnetic bearing and axial magnetic bearing are arranged along the axial direction of the rotor. The size of the rotor bearing is too large, and the gyro room also needs a larger envelope size, which is not conducive to reducing the weight of the system.

At the same time, the longer axial dimension also restricts the increase of the natural frequency of the rotor during the design process

[0003] Chinese patent ZL200710065550.1 "Completely non-contact single-frame magnetic levitation control moment gyro" uses a rotor system supported by magnetic bearings for the high-speed rotor, which greatly improves the working speed and service life of the gyro rotor. However, the radial magnetic bearings, axial The magnetic bearing and high-speed motor are arranged separately along the axial direction of the rotor, so that the axial length of the rotor assembly is relatively large; The high-speed motor and the axial magnetic bearing in the single-frame control torque gyro with end support" and the Chinese patent CN201810075967 "a low-power consumption control torque gyro high-speed rotor system" are located on the inner and outer circles of the same plane, but the magnetic bearing support system still uses Separate radial magnetic bearing and axial magnetic bearing, it is difficult to further reduce the volume and mass of the rotor system

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