采用串联式波纹管机械密封代替原单端面机械密封，解决了减底泵机械密封冲洗液对介质的影响问题。
The infection of the washing liquid used in the pump at the decompression tower bottom to the medium was introduced.
本文介绍了波纹管密封真空泵的研究。
This paper is to describe a study of a mechanical vacuum pump using sealed bellows.
针对不同泵型号其易损件波纹管的使用寿命波动较大，改进了波纹管的参数设计。
But the lifetime of bellows fluctuated very much for different pump. Through analysis, we modified and tested them in the field test.
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