砼泵主油缸ＰＴＦＥ组合密封圈湖北建设机械股份公司戚治义随着高压大排量砼泵的兴起，其液压系统出现了高低压切换和利用活塞运行终止、油缸未换向之前的瞬间升高的压力油进行控制液压自动换向系统换向等先进技术，油缸两端部设置了缓冲、补油及液控先导作用的单向阀。显... HYDRAULIC PUMP MAIN CYLINDER PTFE COMBINED SEAL HUBEI ARCHITECTURAL EQUIPMENT Qi Zhiyi Along with the rise of high-pressure, high-displacement helium pumps, the hydraulic system has experienced high pressure and pressure switching and the use of pistons to terminate the operation, and the instantaneous increase in pressure before the cylinders are not reversing. The oil is controlled by hydraulic automatic reversing system and other advanced technologies. Both ends of the cylinder are provided with check valves for buffering, replenishing and hydraulic piloting. Display...