单级旋片真空泵和双级旋片真空泵的区别

  • Article source:Industry News
  • Website editor:莱诺真空泵
  • Reading volume:
  • Publication time:2022-07-28 11:51:49

旋片真空泵是一种装有旋片的偏置转子在泵腔内作回转运动,使由旋片分隔的泵腔工作室容积周期性变化以实现抽气的真空泵


旋片真空泵分为单级旋片真空泵和双级旋片真空泵,二者之间有哪些差异呢?

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单级旋片式真空泵和双级旋片式真空泵的润滑方法的适用范围不同。双级旋片式真空泵中有效的分馏作用使其更适于在低压强(低于1Torr)下工作。


油分解产生的污染最终要出现在大气级的油中,并且它对*级性能的影响是不太大的,这意味着两次换油之间相当长的时间内可以满意地工作。使用气镇有助于得到使油净化的效果,而在泵的入口处,只会增加千分之几Torr的空气分压强,同时降低了工作噪声。即使没有气镇,双级旋片式真空泵的噪声水平一般也比单级旋片式真空泵低。大气级的高油流率产生的液压噪声,在高真空级是不存在的。低的油流率使得双级旋片式真空泵适于低压强下工作,而不适于在高压强下持续工作。


对于大的气体质量流,当高真空级储油池的油耗尽时,面对强气流,油是无法反溅流入泵腔中的。所以,当必须在高压强(约l0Torr以上)下持续工作时,应强制性地提供油,以进行润滑。


单级旋片式真空泵的润滑系统是基于差压原理,它在低于500-600Torr的压强下,就能很好地工作。当入口压强较高时,油路的气体反流阻止了油的流动,只有强制性供油才能在500Torr以上的压强下连续工作。在必须处理大质旦流率时,单级旋片式真空泵通常要考虑设置油气分离器。

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