活塞环(如图1、图2所示)是在高温、高压条件下唯一做轴向运动、径向运动和旋转运动的零件,同时也是工作条件最为苛刻的零件,在发动机运行中起着非常重要的作用。从外表看,活塞环是一个具有开口的弹性环体,非常容易损坏。四冲程发动机活塞环的第一道环和第二道环被统称为压缩环,压缩环的首要作用在于防止燃烧室漏气。为了达到这个目的,气缸壁与活塞环滑动面之间有油膜,这对于提高活塞环的气密性起着非常重要的作用。 Piston ring (shown in Figure 1, Figure 2) is the only high-temperature, high pressure conditions to do the axial movement, radial movement and rotational movement of the parts, but also the most demanding parts of the working conditions, play an important role in the engine operation Important role. From the outside, the piston ring is an elastic ring with an opening that is very easy to damage. The first and second rings of a four-stroke engine piston ring are collectively referred to as a compression ring. The primary function of the compression ring is to prevent the combustion chamber from leaking. For this purpose, there is an oil film between the cylinder wall and the sliding surface of the piston ring, which plays a very important role in improving the airtightness of the piston ring.