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爪型干式真空泵的传动轴轴头外伸部分通过泵盖处的动密封很重要,该处密封性的好坏直接决定整个泵的密封性能。现有的爪型干式真空泵基本上都是采用垫片密封、填料密封、机械密封、骨架密封或活塞环复合密封,这些密封方式都属于接触式密封,密封件在泵腔内摩擦容易损坏,密封件需要定期更换,严重影响真空泵工作效率,也造成资源浪费。针对这些问题,提出了将磁流体密封技术应用在爪型干式真空泵上,成功地解决了现有爪型干式真空泵的密封问题,使其在满足工作要求的情况下大大地延长了使用年限。
The claw-type dry vacuum pump drive shaft stem extension part of the dynamic seal at the pump cover is important, where the tightness of the seal directly determines the sealing performance of the pump. The existing claw-type dry vacuum pumps are basically used gaskets seal, packing seal, mechanical seal, skeleton seal or piston ring composite seal, these seals are all contact seals, seals in the pump cavity friction easily damaged, Seals need to be replaced on a regular basis, seriously affecting the efficiency of vacuum pumps, but also result in waste of resources. In view of these problems, it is proposed to apply the magnetic fluid sealing technology to the claw-type dry vacuum pump, which successfully solves the sealing problem of the existing claw-type dry vacuum pump and greatly prolongs the service life under the condition of meeting the work requirement .