采用半环卡环连接前端盖的液压缸（见图1）,结构紧凑,重量轻。当其活塞密封失效引起内泄时,需解体更换相应的密封件或修理包。但是如果采用的是粗暴的安装活塞方法,那么修理后往往使用不了多长时间又会出现内泄,然后不得不再次解体液压缸,从而形成恶性循环。我们仔细 The hydraulic cylinder (see Figure 1) with front ring cover attached by a half-ring snap ring is compact and lightweight. When the piston seal failure caused by internal leakage, the need to dismantle the replacement of the corresponding seal or repair kits. However, if the rough method of installing the piston is adopted, the internal leakage may often occur after being repaired, and then the hydraulic cylinder may have to be disintegrated again to form a vicious cycle. We carefully