Large damp magnetic suspension high speed rotating system device

Abstract

The utility model relates to a large-damping magnetic levitation high-speed rotating system device, which belongs to the technical field of magnetic levitation. It includes a rotor assembly, two radial magnetic suspension bearing assemblies, a thrust bearing assembly and a drive motor, and is characterized in that it also includes an auxiliary magnetic suspension support assembly that only has support damping for the rotor assembly but has no support stiffness. The auxiliary magnetic suspension support assembly of the present invention does not provide support stiffness, but only provides controllable additional damping, which can avoid super-static constraints on the rigid body modal vibration of the rotor at low speeds, and at the same time flexibly change the support damping by adjusting the adjustable potentiometer to achieve Meet the requirements of system dynamic performance. This technical solution is simple and easy to implement, and has good effect. The requirements of high speed, heavy load and slender development of rotating machinery rotors make the dynamic problems of machinery increasingly prominent. The research results of the present invention can provide ideas and references 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 sho...

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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. ∞ , μ theory, etc.) can solve this problem, but it is still a challenging problem

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