Novel mixing magnetic bearing

Abstract

The invention discloses a novel mixing magnetic bearing which comprises a rotating shaft, a permanent magnet radial bearing, an auxiliary adjusting device, a protecting spring and a protecting pin, wherein the permanent magnet radial bearing is utilized to supply a bias magnetic field for generating a larger radial suspension force; the auxiliary adjusting device comprises an axial electromagnet bearing, a compression spring, a rolling bearing, a rolling bearing sleeve, a bearing penetrating cover and an isolating check ring; when the system normally works, the auxiliary adjusting device has the function of adjusting the radial position of a rotor; and when the power of the system is accidentally cut off, the auxiliary adjusting device has the function of auxiliary supporting. The novel mixing magnetic bearing has the advantages that the supporting performance and control reliability of the magnetic bearing are increased, the falling abrasion is reduced, the service life of the auxiliary bearing is prolonged, the magnetic bearing is compact in structure, the utility rate of space is increased and the cost is lowered.

Description

technical field [0001] The invention relates to a novel hybrid magnetic suspension bearing. It belongs to the research field of electromagnetic automation equipment. Background technique [0002] Magnetic suspension bearing is a non-contact bearing that uses magnetic force to suspend the rotor. Compared with ordinary bearings, it has the advantages of no friction, no lubrication, high rotor displacement accuracy, high supporting speed, long life, and controllable rotation performance. The magnetic bearing protection bearing is also called auxiliary bearing or safety bearing. It is a temporary support to avoid direct contact between the rotating shaft and the electromagnetic bearing in case of external shock, increased vibration, and electromagnetic bearing failure, so as to protect the electromagnetic bearing and the rotor. Protective effects. At present, rolling bearings with fixed clearances are mostly used to protect bearings. The use of auxiliary bearings with backlas...

AI Technical Summary

Problems solved by technology

Coupled with the large centrifugal force of the high-speed rotor, the collision and friction between the rotor and the inner ring of the bearing will accelerate the wear of the rotor and the bearing, reduce the life of the bearing, and the large impact and collision will even worsen the operating performance of the unit

In addition, at present, electromagnetic bearings mostly use electromagnetic field forces without mechanical contact to control the position of the rotor, which has poor control robustness, high requirements on the control system under ultra-high-speed operation, and poor economy.

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