Rotary Part Of AS-B226 Customized Metal Bellow Mechanical Seal

Background Knowledge：
Microgrooves form of Surface Texture of Non-Contact Mechanical Seals

There are two main types of surface textures for non-contavt mechanical seals: micro-pits and micro-grooves.This paragraph mainly talks about the groove structure.

Hu Danmei and Shun Zongxiang used the finite difference method to analyze the motion of the gas in the gas seal gap at the end face of the straight groove, and optimized the parameters of the straight groove; Wang Heshun et al. analyzed the flow field of the dry gas seal end face of  radial straight groove form and obtained the conclusion that a suitable end face structure can form a sufficient opening force, and the sealing performance of the radial straight groove with the sealing dam structure is better.Han Ping and Hao Muming conducted a three-dimensional numerical analysis of the radial straight groove seal. The calculation results show that the structure has a good dynamic pressure effect, and the pressure difference between the inner and outer diameters has a significant effect on the gas mold pressure.

At present, the size of grooves on mechanical seals is mostly millimeter-scale, and there are few studies on the structure of micro-scale grooves, and the understanding of groove sealing performance needs to be further deepened.