活塞环是密封气缸内表面和活塞间的缝隙的零件,它还起布油和导热的作用。对活塞环的基本要求是密封可靠和耐磨损,因其是易损件,故在设计中应尽量选用标准件使其具有互换性。斜搭口及万字搭口三种(图1)。万字搭口密封性在使用中与直搭口、斜搭口无显著差别,但工艺复杂,而且环端在安装时容易折断,已很少采用。 Piston ring is to seal the gap between the cylinder surface and the piston parts, it also plays the role of oil and thermal conductivity. The basic requirements of the piston ring seal is reliable and wear-resistant, because it is wearing parts, so in the design should try to use standard parts so that it is interchangeable. Oblique oblique mouth and universal interface three (Figure 1). In the use of cross-word seal with straight take the mouth, oblique take the mouth no significant difference, but the process is complex, and the ring end is easy to break when installed, has rarely been used.