传统式液压缸的活塞与导套直接和缸筒与活塞杆摩擦接触。因此,要求活塞与导套的材质较软、耐磨性较高,且运动副的几何精度、表面粗糙度都要求较严格,在工作过程中,并易划伤运动副表面。本文对为克服这些缺点而对液压缸活塞与导套结构进行的改进作了论述。 The piston and guide sleeve of the traditional hydraulic cylinder are in direct frictional contact with the cylinder rod and the piston rod. Therefore, the requirements of the piston and the guide sleeve material is relatively soft, high wear resistance, and the geometric accuracy of the movement, the surface roughness are more stringent requirements, in the course of work, and easy to scratch the deputy surface of the movement. In this paper, to overcome these shortcomings on the hydraulic cylinder piston and guide sleeve structure improvements are discussed.