Abstract
Contact stress and Pull-out stress formatted by piston and the valve seat directly affects the piston seal and friction wear performance. It is of great realistic significance to study on distribution of the contact stress and the assembly relationship between piston and valve seat. Finite element analysis methods were used to obtain the distribution of the contact stress in static and dynamic conditions. Problem of piston size selection was analyzed between different assembly interferences. Simulation results indicate that contact surface average Mises stress of valve seat was about equal to yield strength of materials with interference in 0.01mm; while in conditions of interference in 0.02mm and 0.03mm; radial deformation of valve seat was obvious. Based on analysis and considering mechanical properties of materials, unilateral interference between piston and seat would not exceed 0.01mm; when friction coefficient was defined as 0.05 and unilateral interference was set as 0.01mm, output stress would be 892.14N, which far less than hydraulic pressure arising from pull-out stress who would only be 300N. Therefore, 0.01mm unilateral interference can completely meet the use requirements.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
