Relationship between Closing Force and Leakage Rate in Spiral Groove Mechanical Seal
The spiral grooves fabricated on the end face of the rotating ring of spiral groove mechanical seal possess both the hydrodynamic and the pumping effects. The more significant the hydrodynamic effect, the larger the leakage rate is. The end faces of the sealing rings are lubricated by the fluid film and the frictional heat of the fluid film results in the thermal deformation of the sealing rings. The coupling analysis of the fluid flow in the gap, the heat transfer and the thermal deformation of the sealing rings was carried out in consideration of the viscosity change with the temperature of the fluid film. The separation angle of the end faces β corresponding to the thickness of the fluid film at the inner radius hi was acquired by using the coupling analysis method and then the bearing force and the leakage rate were obtained. Because different form of the gap corresponds to different bearing force and leakage rate, and the bearing force and the leakage rate are in a one-to-one relationship, the closing force that corresponds to the desired leakage rate can be determined based on the equivalence between the bearing force and the closing force.
mechanical seal spiral groove coupling analysis closing force leakage rate
Zhou Jianfeng Gu Boqin
College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China
国际会议
北戴河
英文
1063-1066
2007-06-06（万方平台首次上网日期，不代表论文的发表时间）