液压缸正常维修周期为1~3 a,近年来随着国内煤炭价格下调,采煤利润减少,煤矿为节约运营成本,逐步减少设备的维修次数。探索如何提高液压缸的使用周期意义重大,而内壁维修是液压缸维修最为关键的工序。1内壁缺陷原因分析液压缸内壁出现锈坑、划伤是造成液压缸漏液、窜液的主要原因,内壁的缺陷会直接导致密封件的损 Hydraulic cylinder normal maintenance cycle of 1 ~ 3 a, in recent years with the domestic coal prices down, reduce coal mining profits, coal mining operations to save costs and gradually reduce the number of maintenance equipment. Exploring how to improve the life cycle of hydraulic cylinder is significant, while the inner wall repair is the most critical process of hydraulic cylinder repair. 1 reason for the wall defects Hydraulic rust appears on the inner wall, scratches is caused by liquid cylinder leakage, channeling the main reason, the wall defects will lead directly to the seal damage