Analysis on Stress Distribution of the Piston Rod and the Bush while Cylinder Impact

摘要

The repeated movement between the piston rod and the barrel during the process of cylinder impact will lead to leak and shorten the life of the cylinder. In order to research the distribution of dynamic stress and deformation of the piston rod and the bush when the piston rod suddenly stops at the end of the cylinder with different speeds and different loads, it's necessary to analysis the system by the model simulation. This paper mainly discusses the condition that cylinder works with the load of 50～100N, the piston rod speeds of 500～1000mm/s by using the transient kinetic module of ANSYS/workbench. Simulation results show that higher speed or heavy load will cause the significantly increased stress suffered by the various parts of the system and its deformation is relatively obvious.