Permanent-magnet bearing structure with high axial bearing capacity

Abstract

Disclosed is a permanent magnetic bearing structure with large bearing capacity, which comprises a bearing stator and a bearing rotor (5); the bearing stator is composed of a flexible magnetic ring (1), a positioning ring (2), an external permanent magnetic ring (3) and an internal permanent magnetic ring (4); in the bearing stator, the external permanent magnetic ring (3) is arranged on the external circumference of the positioning ring (2); the internal permanent magnetic ring (4) is arranged on the internal circumference of the positioning ring (2); the flexible magnetic ring (1) is arranged on the upper part of the positioning ring (2); the external circle of the flexible magnetic ring (1) is equal to the external circle of the external permanent magnetic ring (3); the internal circle of the flexible magnetic ring (1) is equal to the internal circle of the internal permanent magnetic ring (4); an axial gap is formed between the bearing stator and the bearing rotor (5) which are in the same axial line; both the internal permanent magnetic ring and the external permanent magnetic ring are magnetized in the axial direction; the magnetic poles of the internal permanent magnetic ring and the external permanent magnetic ring are arranged oppositely to form a closed magnetic path. Based on the novel permanent magnetic bearing structure, the magnetic leakage of the magnetic path and the magnetic resistance of the magnetic path are reduced. Compared with the traditional permanent magnetic structure with the same material and volume, the axial suction between the bearing stator and the rotor is greater.

Description

technical field [0001] The invention relates to an axially loaded permanent magnetic bearing used in an energy storage flywheel, and this type of permanent magnetic bearing can also be used in mechanisms such as mechanical instruments. It belongs to the technical field of magnetic suspension bearings. Background technique [0002] Magnetic bearings are a type of bearings that use magnetic force to levitate a rotating shaft. At present, there are superconducting magnetic levitation, electromagnetic levitation, permanent magnetic levitation and other levitation methods, and some are a combination of the two. Due to the advantages of high speed, no mechanical wear, high reliability, and adjustable dynamic characteristics, magnetic suspension bearings are very suitable for flywheel energy storage systems and mechanical instruments. The efficiency of superconducting magnetic bearing is very high, but the technical requirements and cost are high; electromagnetic levitation requi...

AI Technical Summary

Problems solved by technology

[0004] Technical problem: In view of the insufficient axial load capacity of traditional double-ring permanent magnetic bearings, the present invention provides a permanent magnetic bearing with large axial load capacity

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