Finite Element Analysis of Deformation and Flow of Two-way Cartridge Valve under Different Pressures

In the working process of the two way cartridge valve, deformation and stress are generated by the effect of the changed internal fluid pressures. In this process, the flow of the liquid flowing through the cross section also changes with it. To analyse the stress and deformation distributions of the cartridge valve under the different pressures and the flow analysis in different flow rates and different pressures, finite element method has been used in this paper for analysis and calculation in order to find the structure weak part, the instable flow rate region and the part which hinder the flow rate increased. The results show that: the phenomenon of stress concentration significantly existed in the opening part on the outlet side of the two-way cartridge valve. Under the maximum operating pressure (the maximum working pressure is 31.5 MPa, the maximum flow rate is 4500 L / min), the deformation was larger in the part of girdle. There was nearly no deformation on the upside of the valve body and the stress was less. So, the valve body was the redundant part of two-way cartridge valves. The instable flow rate region was located in the region of the two-way cartridge valve opening across. In the junction of the export of plug-in mounting component and the plug-in mounting block, the flow of liquid was impeded because of its much block and angular structure. The analysis results above have laid a theoretical foundation for the fatigue strength analysis and structural optimization of two-way cartridge valves.