旋片式真空泵进排气口位置、大小对噪音的影响

  • Article source:Industry News
  • Website editor:莱诺真空泵
  • Reading volume:
  • Publication time:2022-08-04 16:18:05

据实验,排气口越近于上切点,噪音越小。但太近,对旋片式真空泵的性能有影响。

生产中发现,排气口小,噪音也小,反之亦大,这说明排气口大小对噪音影响也很大。

他们注意到旋片式真空泵,在大气压下起动时压强高,气体量大,采用高、低真空室同时排气,大部分气体从高真空室的排气阀排出。由于高真空室的排气口的大小对噪音无影响,并且可降低排气压强,减小zui大压缩功和起动功率,所以高真空室的排气口的面积宜取大些。正常运转时,高真空室的排气阀处于关闭状态,影响噪音的主要因素是低真空室的排气阀。因此,低真空室的排气口面积宜取小些,以减少噪音;但排气口过小,排气压力增加,功率消耗会增加。据此,选择了较合适排气口的尺寸和位置,这些虽是设计制造方面应考虑的,但维修者也应予以注意,以便维修中改进噪音大的泵。

设计时考虑进气口位置的原则是吸气容积要最大,容积利用系数要最大,气阻要小等等。

修泵时,要注意进气口滤网是否被堵塞,是否由进气口落入了金属、玻璃碎屑等异物,否则会破坏泵腔等。

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