Leakage Calculation And Numerical Simulation Of Rubber Seal In Super High Pressure Quick Coupling

Energy and environmental issues are currently the most important factors that influence the development of the automotive industry. Natural gas has gradually become one of the effective methods to solve these problems. It has been promoting in many countries. Compressed gas is stored in cylinders in the vehicle as fuel. But this brings a corresponding security risk, leakage or explosion accidents have occurred. Therefore, the quality inspection of gas cylinders has become a top priority to eliminate the source of hidden problems.Quick couplings in high pressure cylinders automated testing equipment are used to connect the cylinder which to be tested with the system, it’s an intermediate node in the key position, so the importance is obvious. Due to the different specifications of the cylinders, pressure varies from a few to hundreds of MP. Such ultra-high pressure make quick coupling’s rubber O-ring damage or fracture, then leak failure occurs, resulting in equipment operation pause. Workers have to replace the apron or quick couplings, this affects production.In light of this, in this paper first study the rubber seal contact model, combined with percolation theory to explore a way to calculate the amount of leakage of a hydrostatic seal in a new perspectives and idea. Secondly, research the key issues in O-type rubber seal key:the contact problem and rubber material finite element analysis. Whereby propose a simplified simulation model and boundary conditions. Finally, research the rubber O-ring force under different conditions in ANSYS simulation. The analysis of the results helps to find out the most critical factors in high pressure seal, which has impact to seal quality of rubber O-rings. Provide some help for designers.