The effect of surface roughness on thermal-elasto-hydrodynamic model of contact mechanical seals  

作　　者：WEN QingFeng LIU Ying HUANG WeiFeng SUO ShuangFu WANG YuMing 

机构地区：[1]State Key Laboratory of Tribology,Tsinghua University

出　　处：《Science China(Physics,Mechanics & Astronomy)》2013年第10期1920-1929,共10页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2009CB724304);the National Natural Science Foundation of China(Grant No.51275268);the National Science and Technology Support Plan(Grant No.2011BAF09B05)

摘　　要：In this paper, the effect of surface roughness on sealing clearance, pressure distribution, friction torque and leakage is studied by the thermal-elasto-hydrodynamic mixed lubrication model. A convergent nominal clearance is formed by the pressure de- formation and thermal deformation of the seal faces. This causes more serious wear in the inner side than that of the outer side of the contact area. Mass leakage increases with the growing of the surface roughness. The temperature and thermal defor- mation on the seal surface increases substantially if the roughness is reduced. The contact mechanical seals have consistent performance when the standard deviation of surface roughness is approximately 0.2 pm. In order to validate the theoretical analysis model, a method combining the measurement of three-dimensioned profile and Raman spectrum is proposed.In this paper,the effect of surface roughness on sealing clearance,pressure distribution,friction torque and leakage is studied by the thermal-elasto-hydrodynamic mixed lubrication model.A convergent nominal clearance is formed by the pressure deformation and thermal deformation of the seal faces.This causes more serious wear in the inner side than that of the outer side of the contact area.Mass leakage increases with the growing of the surface roughness.The temperature and thermal deformation on the seal surface increases substantially if the roughness is reduced.The contact mechanical seals have consistent performance when the standard deviation of surface roughness is approximately 0.2μm.In order to validate the theoretical analysis model,a method combining the measurement of three-dimensioned profile and Raman spectrum is proposed.

关 键 词：contact mechanical seals mixed lubrication thermal-elasto-hydrodynamic model surface roughness 

分 类 号：TH136[机械工程—机械制造及自动化]