关键词:

机械密封, 激光加工, 斜排微孔端面, 富集效应

Abstract:

Laser surface texturing (LST) has been used in mechanical seal for nearly 10 years, and the modeling and experiments have been made for determining the dimensions that characterize LST, but many works still remains to be done in choosing suitable texture and optimizing the dimension designs to help retain lubricant and enhances the hydrodynamic effect at the interface in the running fields.Based on the study of collective effect of a laser-textured mechanical seal with a radial distributed micropore face, a theoretical analysis model for a laser-textured mechanical seal with an oblique distributed micropore face was developed, by which the fluid film pressure distribution between the faces was obtained.The variation of fluid film stiffness and opening force with oblique angle, pore column number, and face radial ratio under different operation conditions was studied, and the load carrying capacity and its mechanisms were presented.The results showed that when the oblique angle was between 60°and 90°, both the radial pore number and the circumferential pore number was equal or the number differences were controlled within the range of ±1, excellent sealing performance could be obtained for a laser-textured mechanical seal with an oblique distributed pore face.

Key words:

机械密封, 激光加工, 斜排微孔端面, 富集效应