A model for analysing the self-tightening coefficient of a metallic lenticular ring gasket joined by a bolted flange

作者：Gong, H. X.^*; Xu, Z. G.; Wang, S.

来源：Materials Research Innovations, 2015, 19(sup6): 153-158.

DOI：10.1179/1432891715Z.0000000001469

• Metal seal
• Lenticular ring gasket
• Self-tightening coefficient
• Bolted flange joint
• Stiffness

The metallic lenticular ring gasket seal belongs to the half self-tightening category. The self-tightening capability of the gaskets directly determines the sealing performance of the pipeline joined by a bolted flange. Self-tightening coefficients of the lenticular gasket are defined by a mathematical model for the maximum contact pressure and preloaded force of the joint. Following this assumption, new formulae for the gasket stiffness and its member stiffness were derived using the theory of elastic mechanics. The relationship of their deformation coordination to different working conditions was analysed. The theoretical results indicate that the self-tightening capability of the metallic lenticular ring gasket is a function of the member stiffness. To ensure the lenticular ring gasket has self-tightening capability the ratio of member stiffness to gasket stiffness must be greater than a certain value.

• 出版日期2015-6
• 单位哈尔滨工程大学