关键词: 变速器；冷却油泵；密封垫片；密封筋；密封性能；有限元分析

Abstract: To solve the leakage between coolant pump and transmission housing, taking the sealing gasket of coolant pump used in transmission as an example, the simulation results of the pressure of the bead were obtained by the finite element analysis software under the preloading and the nonlinear factors of gasket is considered, and compared with the surface pressure test. It is found that the surface pressure distribution is basically consistent, and the average error is about 7.53%, which verifis the accuracy of the calculation model. Finally, according to the coupling effect of thermal load and mechanical load of the coolant pump, the axial load change of the bolt and the surface pressure on the bead under various working condition are obtained. The results show that the designed sealing gasket can form a sealing ring greater than 50 MPa on the bead, and the axial load of the bolt is lower than the maximum allowable axial load, which meets the dual requirements of sealing gasket and bolt strength at the same time, it also provides a theoretical basis for the subsequent gasket design and bolt selection.

Key words: Transmission; Coolant pump; Gasket; Bead; Sealing performance; Finite element analysis