Large damp magnetic suspension high speed rotating system device

Abstract

A large-damping magnetic-suspension high-speed rotating system device belongs to the technical field of magnetic suspension and comprises a rotator assembly, two radial magnetic-suspension baring assemblies, a thrust bearing assembly and a driving motor. The invention is characterized in that the device also comprises an assistant magnetic-suspension bearing assembly which has bearing damping butno bearing rigidity to the rotator assembly. The assistant magnetic-suspension bearing assembly of the invention does not provide bearing rigidity and only provides controllable additional damping, and therefore can avoid production of hyperstatic constraints on rigid-body modal vibration of rotators under low rotation speed; meanwhile, the bearing damping can be conveniently changed by adjustingan adjustable potentiometer to satisfy dynamic performance requirements of the system. The technical proposal is simple and easy to apply and has good effect. High-speed, heavy-bearing, and long and thin development requirements of rotating mechanical rotators increasingly highlight the dynamic problems of the machinery. The study results of the invention can provide guidance and reference for solving related practical problems.

Description

technical field [0001] The large-damping magnetic levitation high-speed rotation system device of the present invention belongs to the technical field of magnetic levitation. Background technique [0002] Compared with traditional bearings, magnetic suspension bearings have no contact with the rotor, support low power consumption, and have a long service life; do not need lubrication and sealing, and can be used in special environments such as high and low temperature for a long time; low maintenance costs, easy to actively control, etc., so It is considered to be a revolution in support technology, and it is the only active support device put into practical use at present. Magnetic suspension bearings are mainly used in rigid rotor systems. Due to the requirements of high-speed, heavy-load, and slender development of rotating machinery rotors, they are gradually being extended to flexible rotor systems. [0003] However, the relevant research results at home and abroad sh...

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Problems solved by technology

[0005] Some research results at home and abroad show that designing a suitable control scheme using modern control theory or robust control theory can improve the dynamic performance of the system, but it is not yet possible to achieve a large The amplitude increases the support damping of the system during subcritical and supercritical operation, and most of the research objects are experimental systems, and there are not many practical applications

In 2000, Hirochika Ueyama, a researcher at the R&D center of Japan’s “Koyo Co., Ltd.”, a well-known bearing manufacturing company, published a paper at the 7th International Conference on Magnetic Suspension Bearings held in Switzerland, saying, “Although some public documents show that modern control theory (LQG, H∞, μ theory, etc.) can solve this problem, but it is still a challenging problem

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