旋片真空泵的常见故障有哪些?

  • Article source:Industry News
  • Website editor:莱诺真空泵
  • Reading volume:
  • Publication time:2020-12-21 08:31:04

旋片真空泵的常见故障:
 
  1.漏油。可以发生在轴封,油箱与泵零部件的密封面,放油塞、油标、油孔闷头、定子部件与支座的通孔连接处,气镇阀等部位。可由密封件老化,安装不当,损坏失效,表面不平整、有杂质、粗糙和铸件疏松等引起。如果停泵后返油,油会进入气镇阀,不关气镇阀可能会漏油。自制橡胶垫时,一定要用耐油橡胶,要按照原设计形状,密封面太大时压不紧会漏油。

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    2.泵不转。情况不明不能先开泵,以免加重故障。分为用手能盘动和不能盘动。
 
  3.泵温太高。指低级排气阀附近测得的高油温超过使用说明书值。由于泵温升高会使泵油粘度大幅下降,并使泵油的饱和蒸汽压升高,使泵的极限压力升高和抽气效率下降;使橡胶件容易老化;热膨胀使运转间隙缩小,特别是某些非金属旋片的厚度方向和铜套内孔间隙,影响泵运转的可靠性。泵温太高的原因可以是泵温度太高,进气温度太高,进气冷却装置失效,泵长期连续运转入口压力太高;水冷泵冷却水量不足,循环水设计效果不佳;温控水量调节阀失效等。
 
  4.大功率超标。可由长期连续作入口压力太高、排气压力太高、杂物进入发生咬合、泵温太高、旋片等配合间隙太小、电压太高、泵液返入泵内太多等引起,会使电机损坏。应尽量避免在最大功率附近长期连续运转。如果表面有沉积物,要定期拆开清除。

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