Research on dynamic simulation method of leakage prediction for hydraulic system

摘要

The dynamic simulation method of leakage prediction for hydraulic system is presented in this paper. A model is built for the method to analyze its composition and functions of the modules in it. Considering that there is friction between the seal and the rod, thermo-mechanical coupled method is applied to get the pressure distribution in the contacting region. The influence of the seal wear on the leakage is also included. A remeshing strategy based on the finite element technique is employed to simulate wear process. In order to find the inflection points precisely, a correction method based on hydrodynamic theory is used. Finally, the realization of the dynamic simulation method for the leakage prediction is given. To validate the simulation method, the simulation results are compared with the test results. The two results are in good agreement. The simulation method presented in this paper will be a reliable and time-saving one to predict the leakage for the hydraulic system.