当使用带有切口的活塞环来密封压缩机活 塞和气缸之间的间隙时,气体穿过活塞环的切口间隙,穿过活塞环元柱面与气缸镜面以及活塞环平面（端面）与活塞环槽壁之间的间隙进行泄漏（图1）。 压缩机在运行过程中穿过活塞密封而泄漏的气体,随着通流面积的改变而变化很大,而通流面积的变化是由许多因素决定的。例如, When using a notched piston ring to seal the gap between the compressor piston and the cylinder, the gas passes through the gap in the piston ring, through the piston ring cylinder and mirror face of the cylinder, and the plane of the piston ring (end face) Leakage of the gap between the groove walls (Figure 1). The amount of gas that leaks through the piston seal during operation of the compressor varies greatly with the flow area and the change in flow area is determined by a number of factors. E.g,