Analyses toward factors influencing sealing clearance of a metal rubber seal and derivation of a calculation formula

作者：Yan Hui; Zhao Yalei; Liu Jianguo; Jiang Hongyuan^*

来源：Chinese Journal of Aeronautics, 2016, 29(1): 292-296.

DOI：10.1016/j.cja.2015.09.002

• Elastic mechanics theory
• Elastic modulus factor
• Metal rubber
• Seals
• Temperature factor

Sealing clearance is a key factor for a metal rubber seal's sealability. The expansion coefficient and expansion deformation in the radial direction of metal rubber have been obtained through a thermal expansion experiment of metal rubber. The influence of the elastic modulus to the sealing clearance has been analyzed theoretically. By combining the temperature and elasticity factors of metal rubber with the elastic mechanics theory, the calculation formula of the sealing clearance has been derived, and the values of the sealing clearance and the leakage rate in certain working conditions have been calculated. Experimental results are consistent with calculation results in a high degree. The calculation formula of the sealing clearance can explain the influences of the temperature and elastic modulus factors of metal rubber on the sealing clearance. It can provide guidance for the study of sealing mechanism of metal rubber seals.

• 出版日期2016-2
• 单位哈尔滨工业大学