Vacuum pump
CN224693555UActive Publication Date: 2026-08-28BEIJING GRAND RAY TECH CO LTD
View PDF 0 Cites 0 Cited by
Patent Information
- Application Number
- CN202522251154.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-24
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2035-10-24
AI Technical Summary
Technical Problem
其中，级间密封是多级串联式真空泵中的重要结构之一，在相关技术中级间密封通常设计在旋转件上，因此装配完成后需要对转子进行动平衡校正，这导致了多级串联式真空泵的密封结构安装以及加工不便的问题
Benefits of technology
[0014]在本申请实施例中，定子内部具有多个压缩腔室以及分隔多个压缩腔室的多个级间密封部，级间密封部与转子相对处形成有多个交错布置的密封间隙与膨胀密封腔，流体在通过多个交错布置的密封间隙与膨胀密封腔时，由于流体流通路径呈现曲折状，因此通过曲折路径时可以产生节流效应，进而实现对流体的迷宫密封功能并减少流体泄漏。也就是说，本申请通过多个交错布置的密封间隙与膨胀密封腔形成密封，无需在转子上安装密封件，从而有利于解决多级串联式真空泵的密封结构安装以及加工不便的问题。
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224693555U_ABST
Abstract
The application provides a vacuum pump, comprising a stator, a rotor rotatably installed in the stator, wherein the stator has a plurality of compression chambers and a plurality of inter-stage sealing portions separating the plurality of compression chambers, and a plurality of staggered sealing gaps and expansion sealing cavities are formed at the positions opposite to the rotor of the inter-stage sealing portions. The application forms a seal through the plurality of staggered sealing gaps and expansion sealing cavities, and does not need to install a sealing member on the rotor, thereby being beneficial to solving the problems of inconvenient installation and processing of the sealing structure of the multi-stage series vacuum pump.
Need to check novelty before this filing date? Find Prior Art