Permanent magnetic levitation bearing with radial magnetic force and axial magnetic force mutually exclusive for levitation

Abstract

The invention provides a permanent magnetic levitation bearing with radial magnetic force and axial magnetic force mutually exclusive for levitation. The permanent magnetic levitation bearing comprises a shaft core, the shaft core is sleeved with a first annular iron disc, and the outer side of the first annular iron disc is sleeved with a first magnet set, a second magnet set and a second annulariron disc in sequence; the first magnet set and the second magnet set are in magnetic communication in the radial direction and are reverse in magnetic flux direction; the two sides of the first annular iron disc are provided with third annular iron discs, and the outer sides of the third annular iron discs are provided with fourth annular iron discs; the first annular iron disc, the second annular iron disc, the third annular iron discs, the fourth annular iron discs and the shaft cores are all made of a back iron material; third magnet sets and fourth magnet sets are sequentially arranged between the fourth annular iron discs and the second annular iron disc and are in magnetic communication in the axial direction, and the magnetic flux directions of the third magnet sets and the fourthmagnet sets are reverse. The permanent magnetic levitation bearing provides axial supporting force and axial supporting force at the same time, the flexibility of the bearing is greatly improved, theusing quantity of a permanent magnet material is decreased, the structure is simple, machining is convenient, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of magnetic suspension, in particular to a permanent magnetic suspension bearing in which radial and axial magnetic force mutually repel suspension. Background technique [0002] Bearings are widely used in the machinery industry. They are a kind of supporting parts and basic parts with strict requirements. They are the supporting components of the rotating shafts or movable parts of various machines. called mechanical joints. [0003] Magnetic suspension bearings use magnetic force to suspend the rotor in the air, so that there is no mechanical contact between the rotor and the stator. Compared with traditional bearings, magnetic suspension bearings have no mechanical contact, and the rotor can run at a high speed. It has the advantages of small mechanical wear, low energy consumption, low noise, long life, no lubrication, and no oil pollution. It is especially suitable for High-speed, vacuum, ultra-clean...

AI Technical Summary

Problems solved by technology

[0004] Magnetic levitation bearings are generally permanent magnet type. Due to the high cost of permanent magnet materials, the cost of permanent magnetic levitation bearings is high, and the permanent magnetic levitation bearings in the prior art are generally divided into two types: axial type and radial type. The two types of permanent magnetic levitation The load-bearing direction of the bearing is fixed, and the flexibility of use is poor, and the structure of the permanent magnetic suspension bearing in the prior art is complicated, and the production cost is high

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