A.往復运动时作用于活塞杆上的负荷 往复运动时作用在活塞杆上的负荷有:仅 因汽缸内气体压力产生的力（称活塞力）及因 为活塞、活塞杆、十字头等往复运动部份加 速度运动时其加速所需要的力（称惯性力）两 种。 1.活塞力的计祘方法:以卧式三段压缩 机为例,並引用下列符号按下式可以祘出左右 行程的“活塞力”。 A. Reciprocating motion acting on the piston rod When the reciprocating load acting on the piston rod are: only due to the gas pressure in the cylinder (referred to as piston force) and because the piston, piston rod, crosshead and other reciprocating motion Acceleration during acceleration of the force required (known as inertia) two. 1. Piston force meter 祘 method: the horizontal three-stage compressor, for example, and reference the following symbols according to the following formula can be out about the “piston force.”