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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.
In this paper, the effect of surface roughness on sealing clearance, pressure distribution, friction torque and leakage is studied by the thermal-elasto-hydrodynamic mixing lubrication model. A convergent nominal clearance is formed by the pressure deformation and thermal deformation of the sealing 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. 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 0.2 μm. In order to validate the theoretical analysis model, a method combining the measurement of three-dimensioned profile and Raman spectrum is proposed.