Convex arc type magnetic fluid sealing device

Abstract

The invention discloses a convex arc type magnetic fluid sealing device which comprises a shaft, a shell, pole shoes, magnet fluid and permanent magnets. The convex arc type magnetic fluid sealing device is characterized in that the shaft penetrates and extends out of the two ends of the shell; the part, located in the shell, of the shaft is provided with at least one circular ring; the outer circumferential faces of the circular rings are in a convex arc shape; at least two pole shoes are arranged on the inner surface of the shell; the part between every two adjacent pole shoes is provided with the corresponding annular permanent magnet; the pole hoes are of circular-ring-shaped structures; the inner circumferential faces of the pole shoes located between the circular rings and the shellare in a concave arc shape; and the magnetic fluid is arranged in sealing clearances between pole teeth and the shaft. By means of the convex arc type magnetic fluid sealing device, the sealing pressure-resisting capability of the magnetic fluid is greatly improved, and the problem that an existing sealing device cannot meet the requirement for high sealing performance under special conditions such as high speeds and heavy loads is solved.

Description

technical field [0001] The invention belongs to the field of mechanical engineering sealing, and in particular relates to a convex-arc magnetic fluid sealing device capable of maintaining good sealing performance under high-speed and heavy-load working conditions. Background technique [0002] Compared with the traditional mechanical seal, the magnetic fluid seal has its unique advantages. It realizes a leak-free and wear-free seal, and can be used in high-speed rotating conditions. Within the range and under static and dynamic conditions, it can basically achieve a completely leak-free seal; under the condition of magnetic fluid seal, there is no direct contact between the moving part and the static part, which belongs to the non-contact seal, no mechanical wear, and has a long service life. The magnetic fluid is easy to replenish; the seal has lubricating effect at the same time, so there is no need for an external lubrication system; both sides of the seal can be pressuri...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a convex arc type magnetic fluid sealing device, so as to solve the problem of low pressure resistance existing in the existing sealing device, so that the sealing technology can be successfully applied in the fields of high speed and heavy load

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