Modeling and Experimental Study on the Sealing Performance of Automobile Brake Fluid Reservoir

The brake fluid reservoir is an indispensable part of the hydraulic brake system. Due to the development of the electronic hydraulic brake system (EHB), the requirements for the sealing performance of the reservoir are also improved accordingly, and the traditional reservoir can no longer meet the current performance requirements. Based on a traditional brake fluid reservoir, this paper breaks through the traditional method of verifying the design through bench test, increases the evaluation standard of dynamic sealing performance test, supplements the problem of missing sealing simulation model, and adopts the method of combining modeling and simulation with bench testing to study the current sealing performance requirements. Through the establishment of high-precision static sealing performance simulation model and dynamic sealing performance simulation model under different working conditions, the simulation data of the current evaluation metrics are obtained. In order to further verify the accuracy of the simulation model, the corresponding test benches are designed, the tests are carried out and the real test data is obtained. After comparison, the consistency between simulation data and bench test data is high, so the two simulation models are accurate and reliable. Through the contact pressure data of the seal ring obtained by simulation, the sealing performance can be evaluated more intuitively, which breaks through the limitation of the test bench test and establishes a new evaluation metrics. Based on these models, the factors that may affect the sealing performance are further simulated, and the simulation data obtained can provide reference for the subsequent structure optimization. Compared with the traditional design method, the method of combining modeling and simulation with bench testing proposed in this paper can greatly improve the design efficiency, shorten the development cycle and reduce the design cost, which has a greater engineering significance.