Embedded magnetic fluid sealing device for bearing

Abstract

The invention aims to provide an embedded magnetic fluid sealing device for a bearing. The embedded magnetic fluid sealing device comprises a shell; a left bearing and a right bearing are arranged in the shell in the axial direction in a spaced mode. An inner pole shoe ring, a middle pole shoe ring and an outer pole shoe ring are respectively arranged on the end face of the outer sleeve, and the middle pole shoe ring and the outer pole shoe ring are partially embedded into the bearing, so that the tail ends of the middle pole shoe ring and the outer pole shoe ring form a sealing gap with a bearing ball; the inner pole shoe ring is arranged at the outer end, corresponding to the inner ring of the bearing, of the sleeve, the sealing gap is formed between the tail end of the inner pole shoe ring and the outer end face of the inner ring of the bearing, the sealing gap can solve the problem that the sealing performance is affected when a large-size shaft jumps during rotation, and magnetic fluid in the sealing gap can prevent dust, water and impurities from polluting the working space of the bearing. And the service life of the bearing is prolonged. According to the embedded magnetic fluid sealing device for the bearing, the service life of the bearing can be effectively prolonged, and the embedded magnetic fluid sealing device is suitable for large-shaft-diameter high-speed rotation occasions.

Description

technical field [0001] The invention belongs to the field of mechanical engineering seals, in particular to an embedded magnetic fluid seal device for bearings. Background technique [0002] Magnetic fluid is a new type of intelligent material. Magnetic fluid seals have been more maturely used in sealing vacuum, gas and other occasions. Magnetic fluid seals are non-contact seals with zero leakage, long life, simple structure, high reliability, and friction. Small and other advantages, it solves many engineering problems with high sealing requirements. The research and application of ferrofluid has broad application prospects, and many unknown fields have yet to be developed. When the magnetic fluid in the seal gap rotates at high speed, the wear of the bearing will be aggravated, which will shorten the life of the seal assembly. Therefore, improving the service life of the bearing is one of the hot issues in current research. [0003] Chinese patent CN201811241396 proposes...

AI Technical Summary

Problems solved by technology

When the magnetic fluid in the seal gap rotates at high speed, the wear of the bearing will be aggravated, which will shorten the life of the seal assembly. Therefore, improving the service life of the bearing is one of the hot issues in current research.

[0003] Chinese patent CN201811241396 proposes a magnetic ring sleeve-type magnetic fluid sealing device, which solves the problems of difficult assembly and low pressure resistance by adopting the design of the sleeve, but the bearing is exposed to the external environment for a long time without other special protection. Under high speed and heavy load, dust, water, and impurities will cause increased wear or even failure inside the bearing, which will greatly shorten the service life of the sealing components

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