Research on Low-friction and High-response Hydraulic Cylinder with Variable Clearance

doi:10.3901/JME.2015.24.161

Abstract

Abstract: Hydraulic cylinder is an important component of the hydraulic system. It directly affects the static and dynamic characteristics of the hydraulic system. The first generation of hydraulic cylinder with rubber seals has great friction and poor dynamic performance. Hence, it is not adapted to the hydraulic system with high frequency and restricts the development of high-speed hydraulic cylinder. The second generation of hydraulic cylinder with clearance gap seals uses constant gap sealing technology to decrease the friction and improve the dynamic response, but the volume efficiency is reduced. After years of researches,the third generation of hydraulic cylinder without seals using pressure self-compensation and variable clearance technology is developed on the basis of the first and second generation of hydraulic cylinders. After theoretical analysis, mathematical modeling, simulation research, experimental verification and applications, it is proved that the third generation of hydraulic cylinder had perfect static and dynamic characteristics and long working life. It is well applied to high frequency response and high-speed hydraulic transmission and hydraulic servo system. These technologies can be extended to other hydraulic components that require small deformation, and can make the manufacturing and the hydraulic technology go forward.

Key words: high frequency response, hydraulic cylinder, low friction, variable clearance seal, without seals

ZHAN Congchang, DENG Jianghong, CHEN Kuisheng. Research on Low-friction and High-response Hydraulic Cylinder with Variable Clearance[J]. Journal of Mechanical Engineering, 2015, 51(24): 161-167.

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Research on Low-friction and High-response Hydraulic Cylinder with Variable Clearance

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