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活塞是减速顶最重要的部件,它是否保持正常工作状态,将直接影响减速顶的使用寿命,而活塞杆表面完好无损又是保证减速顶正常工作的必要条件之一。活塞杆与密封盖配合形成一个摩擦副,其作用之一是密封(中间有组合密封圈),确保滑动油缸内的油气压力处于正常状态,二是导向,承受车轮的一部分冲击力。为此,活塞杆与密封盖孔壁之间应有适当间隙。
The piston is the most important part of the decelerating roof. Whether it maintains the normal working state will directly affect the service life of the decelerating roof, and the surface of the piston rod is intact, which is one of the necessary conditions to ensure the decelerating roof to work normally. The piston rod and the sealing cap cooperate to form a friction pair. One of the functions of the piston rod and the sealing cap is to seal (the combined sealing ring in the middle) to ensure that the pressure of the oil and gas in the sliding cylinder is normal and the second is to guide and withstand a part of the impact force of the wheel. For this reason, there should be a suitable clearance between the piston rod and the wall of the sealing cap.