1. School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China;
2. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
3. School of Information Engineering, Wuchang University of Technology, Wuhan 430223, China
Abstract:The viscous damper of a clearance hydrocylinder is a very extensive application of isolation device, because of its large output damping force, long lifetime, high safe factor, simple structure and low cost. In practice, a damper is multi-freedom degree system. Considering the influence of pressure difference flow and shearing flow, the damping characteristic modeling was done while the piston was eccentric. First, the quantity of fluid flow in the clearance between parallel plates was calculated based on the constitutive equation of damping fluid. Then, appropriate tiny unit was chosen, and it was considered to the fluid flow in the clearance between parallel plates. The total quantity of fluid flow in the circular clearance was calculated by numerical integration and the expressions of damping force and damping coefficients in the vertical and horizontal directions were obtained. Numerical simulation analysis indicated the influence of shearing flow on the damping characteristic was not ignored while the clearance was larger. The influence of eccentricity on the damping characteristic in the vertical direction was small and the influence of eccentricity on the damping characteristic in the horizontal direction was significant.
喻强1,徐登峰2,朱煜1,2,管高峰1,李强3. 间隙式油缸粘滞阻尼器阻尼特性建模与数值仿真分析[J]. 振动与冲击, 2020, 39(20): 161-167.
YU Qiang1,XU Dengfeng2,ZHU Yu1,2,GUAN Gaofeng1,LI Qiang3. Damping characteristic modeling and numerical simulation analysis of the viscous damper of a clearance hydrocylinder. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(20): 161-167.
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