旋片真空泵不抽气或者压力不足的原因及解决方案

  • Article source:Industry News
  • Website editor:莱诺真空泵
  • Reading volume:
  • Publication time:2023-06-15 17:33:45

工作中常发现这样的情形:当启动了旋片式真空泵开始工作后,真空度老是上不去,有时伴有很大噪声。这大体上有两种情况:

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1.不抽气:这时,测得的真空度很低或用高频火花检漏器根本打不出辉光。主要原因是真空泵转子不转。检查时,发现泵轮在转,但仔细听声音无阀片跳动声,泵轴不随真空泵轮转动。这是因为轮键掉了或断了,只要把键安好就可以了。对于某些组合泵,前、后级转子轴是通过轴端开槽互相咬合的,若打坏了槽齿,则只有高真空转子在旋转,低真空端转子就不转了,或运转不正常,此时,也不抽气。若因工作疏忽,未打开低真空阀或橡皮夹子,亦可属不抽气的情况。此外,排气阀的弹子掉了、定片泵压定片的弹簧断了或泵的排气阀阀门片碎了也会造成不抽气的现象。
2.抽大气:这种情况与上面不抽气的表现不太一样,泵音常伴以很大的噪音,阀片跳动很响,油箱上面油筒内有冒烟的现象,有时还有大量油或油雾同时喷出,这些均是被排出的大量气体——高速气流冲击真空泵油形成的现象。如果在开泵瞬间产生这种状况,很快就消失,这是正常的。如果有喷油,则应险介是否因泵汕过多或防喷油没施不够,并加以改进。若这种现象在开泵后一直继续下去,则可判定泵是在抽大气。这可能是由于与泵连接的系统真空橡皮管已脱落,前级放气阀,掺  ,气阀未关,系统破裂等原因所造成。如果确是上述原因,则可以夹上真空夹或关低真空阀、掺气阀,这种情况会有好转;如果确非这些原因,则要将泵拆出,进一步检查泵本身的原因了。
当真空泵本身密封处有较大的漏孔,阀片损坏,旋片,定片,滑阀等损坏,转子或滑阀环裂,弹簧断,轴封橡皮圈坏,油量很少,掺气阀大开或损坏等情况发生时,严重的就产生抽大气那种现象,轻微的仅表现为泵的极限真空度较低而已。
明显的故障往往是易于排除的,只要把低真空阀、掺气阀关死或夹紧橡皮管上的真空夹,换掉损坏部件即可。伹有些情况却是较复杂的。·我们需要根据实际情况对真空泵进行进一步的拆开检查,确认真空泵的问题所在,再做进一步的更换损坏的配件,重新修复安装。

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