Combined magnetic bearing

Abstract

The invention discloses a combined magnetic bearing. According to the combined magnetic bearing, a casing comprises a circular hollow cavity and has one open end surface; a plurality of mounting hole positions are evenly arranged in the circular hollow cavity at intervals; both large-magnetic-force magnets and small-magnetic-force magnets adopt strip-shaped magnets; the quantity ratio of the large-magnetic-force magnets to the small-magnetic-force magnets is 1:5; the large-magnetic-force magnets and the small-magnetic-force magnets are circumferentially mounted in the corresponding mounting hole positions; all N poles face the circle center; a lead block is arranged in the mounting hole positions for mounting the large-magnetic-force magnets; an inner-ring magnet is arranged in the center of the casing; the outer ring of the inner-ring magnet is an N pole; a front magnetic plate and a back magnetic plate are arranged at two ends of the inner-ring magnet; the front magnetic plate is fixedly mounted on a front cover for sealing the open end surface of the casing; the back magnetic plate is fixedly mounted on the casing; and the outer side of the casing is sleeved with a deep groove ball bearing. Compared with a common bearing, the combined magnetic bearing highlights the advantages of low mechanical wear, low energy consumption, low noise and the like, and the defect that the orthocenter is required to be found is overcome during mounting of a shaft.

Description

technical field [0001] The invention relates to a magnetic suspension bearing, in particular to a combined magnetic suspension bearing. Background technique [0002] 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 and other special environments. The advantages of magnetic suspension bearings are far greater than ordinary bearings. For many fields, ordinary bearings cannot achieve the overall function because the friction force does not meet the requirements or the precision is not enough. At present, China started late in the field of magnetic suspension bearings, and the research depth is not enough to lag behind foreign countries. There are few types of magnetic suspension bearings in China, and mos...

AI Technical Summary

Problems solved by technology

The advantages of magnetic suspension bearings are far greater than ordinary bearings. For many fields, ordinary bearings cannot achieve the overall function because the friction force does not meet the requirements or the precision is not enough.

At present, domestic magnetic suspension bearings started late, and the research depth is not enough to lag behind foreign countries. There are few types of magnetic suspension bearings in China, and most of them are in the stage of theoretical research, which cannot be used in practice in a real sense.

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