活塞式空压机启动之前(特别是在安装、检修后及较长时间停车后启动之前)要盘车2～3转。这是为什么呢?盘车的作用主要有以下几点。防止发生撞缸事故:在空压机安装、检修时,气缸中落入的金属异物(如螺钉、螺母及螺丝刀等)没有清理出去,开车时就可能发生撞缸事故。另外,由于空压机长期使用,使运动机构的零件(如轴瓦、十字头销等)磨损严重,因而使间隙增大, Piston air compressor before starting (especially after installation, maintenance and parking for a long time before starting) to crank 2 ~ 3 turn. This is why? The main role of the car has the following points. To prevent cylinder collision accident: air compressor installation, maintenance, the cylinder into the metal foreign objects (such as screws, nuts and screwdrivers, etc.) did not clean out, driving collision may occur cylinder accident. In addition, due to the long-term use of air compressor, so that the movement of the body parts (such as bearings, crosshead pins, etc.) serious wear and tear, thus increasing the gap,