Sealing Structure Optimization And Characteristic Analysis On Hydraulic Rotating Angle Self-servo Swing Cylinder Vane

When the hydraulic rotating angle self-servo swing cylinder works,leak is inevitably arising of the rotating vane due to the factors such as structure design or assembly accuracy,and the dynamic vane seal is always a difficult problem.To solve this problem,a pressure self-adaption door-shaped seal component is proposed in the paper.Firstly,the dynamic characteristic of the new-typed hydraulic rotating angle self-servo swing cylinder is analyzed,and then to solve the leakage of vane,the paper designs a pressure self-adaption door-shaped seal component,and the property of the designed seal component are analyzed in detail.In this paper,the related tasks are as follows:(1)The work principle of hydraulic rotating angle self-servo swing cylinder is analyzed.The MATLAB/Simulink model of the hydraulic cylinder is established.The dynamic characteristic of the hydraulic rotating angle self-servo swing cylinder is comparatively analyzed when there is a seal component or not,and it reveals that vane seal characteristic is very important for the hydraulic rotating angle self-servo swing cylinder.(2)Aiming at the leakage of the hydraulic rotating angle self-servo swing cylinder,the paper designs a door-shaped seal structure.Then its finite element model is established by using ANSYS software,contact stress of the sealing surface is analyzed.In addition,modes of door-shaped seal component and vane are also analyzed.(3)The oil film distribution of the door-shaped seal component is deduced out by using the hydrodynamic pressure lubrication theory,then oil film thickness distribution diagrams under different working conditions are obtained.The paper analyzes viscous torque and leakage of seal end face,then optimizes the oil film thickness,finally,the theoretical rationality is validated by flow field simulation in FLUENT software.(4)Life prediction model of the door-shape seal component is established respectively from fatigue fracture and end face abrasion.There is comparison between fatigue fracture and end face abrasion.Some measures to prolong the working life of the door-shape seal are proposed.(5)The structure of the door-type seal is optimized by using the Nash game optimization theory,to improve its property and reduce the leakage and end face abrasion.