Oil filling device of vacuum rotating seal pump

Abstract

The invention discloses an oil filling device of a vacuum rotating seal pump. The oil filling device of the vacuum rotating seal pump comprises a rotating main shaft and a shaft sleeve, wherein the surface of the rotating main shaft is provided with an annular boss; a sleeve sealing piece is arranged outside the boss; the sleeve sealing piece is positioned between the rotating main shaft and the shaft sleeve; a partial gap is formed in the boss; an oil inlet corresponding to the boss is formed in the shaft sleeve; a ball which is supported by a spring is arranged on the oil inlet; the diameter of the ball is the same as that of the oil inlet; an inclined oil inlet groove is formed in the oil inlet at the lower part of the ball; when the partial gap of the boss is contacted with the ball, the ball is jacked towards the rotating main shaft by the action of the spring, the oil inlet groove of the oil inlet can be communicated with the partial gap of the boss, and lubricating oil is filled in the partial gap of the boss under the action of the pressure of oil in the oil inlet; and when the rotating main shaft rotates by a circle, a trace of lubricating oil enters between the rotating main shaft and the shaft sleeve, and then the aims of automatic oil filling and controllable oil filling amount can be realized.

Description

technical field [0001] The invention relates to a vacuum pump, in particular to an oil injection device applied to a vacuum rotary seal pump. Background technique [0002] During the oil filling process of the vacuum pump, because the rotating parts are all rotary seals, it is easy to cause the problem of oil filling and reduce the sealing performance. In response to the above problems, someone applied for an oil cup for a vacuum rotary seal pump with a patent number of 200920048234 in 2009, but this patent still cannot solve the problem of rotary sealing during oil injection. SUMMARY OF THE INVENTION [0003] Based on the above problems, the present invention provides an oil injection device for a vacuum rotary seal pump. [0004] The object of the present invention is to realize through the following technical solutions: [0005] The oil filling device of the vacuum rotary seal pump includes a rotary main shaft and a shaft sleeve, an annular boss is arranged on the sur...

AI Technical Summary

Problems solved by technology

[0002] During the oil filling process of the vacuum pump, since the rotating parts are all rotary seals, it is easy to cause the problem that the sealing performance is reduced while the oil is being filled.

In response to the above problems, someone applied for an oil cup for a vacuum rotary seal pump with the patent No. 200920048234 in 2009, but this patent still cannot solve the rotary seal problem during the oil filling process.

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