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活塞环按断面结构形状,有矩形环、扭曲环、锥形环、梯形环、桶面环等,又有内倒角、外倒角,内切面、外切面之分。其基本安装原则是:①凡镀铬的矩形环,常为第一道气环:②活塞环端面刻有“S”、“STD”、“上”和“向上”字样的,安装时应使有标记的一面朝向活塞顶部;③安装外切扭曲环时,将有外切面或倒角的一面朝下,内圆有切面或
Piston ring according to the cross-sectional structure of the shape, a rectangular ring, twisted ring, tapered ring, trapezoidal ring, barrel surface ring, and other chamfering, chamfering, internal and external surface points. The basic installation principle is: ① Where the chrome-plated rectangular ring, often the first gas ring: ② piston ring engraved with “S”, “STD”, “on” and “up” words, the installation should be made Mark the side toward the top of the piston; ③ installation circumcision twisted ring, there will be an external or chamfered side down, the inner circle has a cut surface or