根据两物体间相对运动时的摩擦状态和磨损理论,结合某型液压升降装置出现的拉缸现象,对液缸产生拉缸的机理和过程进行分析,提出为缓解和避免装置的拉缸问题,在结构上采取的改进措施.通过对摩擦副材料和结构的改进,实现了金属与非金属的配合关系,降低了摩擦系数,同时也提高了运动副的导向性能和润滑性能,进而从根本上避免了冷焊结点和拉缸的产生. According to the frictional state and wear theory of the relative motion between two objects, combined with the phenomenon of cylinder pulling in a certain type of hydraulic lifting device, the mechanism and process of drawing cylinders in the hydraulic cylinder are analyzed, and the problem of pulling cylinders for the device is solved and mitigated. Improvement measures taken in the structure. Through the improvement of the friction pair material and structure, the metal and non-metal coordination relationship is achieved, the friction coefficient is reduced, and the guide performance and lubrication performance of the motion pair are also improved, and fundamentally. Avoid cold welding knots and cylinders.