论文部分内容阅读
活塞与活塞环在发动机的气缸中作往复的直线运动,承受着机械负荷和热负荷,是活塞式发动机工作条件最严酷的机件。本文所要分析的则是活塞与活塞环承受了过强的机械负荷、过热负荷及润滑条件恶劣所造成的故障。活塞上的第一道气环所承受的机械负荷、热负荷及润滑条件是活塞环中最严酷的。因此,其强度及圆柱面都进行了相应的处理,如加厚尺寸,圆柱面镀铬等。而实践中常有第一道气环依旧,其下面的活塞环发生了裂断,如果排除制作过程中各种隐患的存在,只有从机械负荷、热负荷和润滑条件方面分析裂断的原因。
Pistons and piston rings in the engine cylinder for reciprocating linear motion, to withstand mechanical and thermal load, is the piston engine working conditions of the most harsh parts. This article analyzes the piston and piston ring is subjected to excessive mechanical load, overheating load and poor lubrication conditions caused by the failure. The first ring on the piston to withstand the mechanical load, heat load and lubrication conditions are the most severe piston ring. Therefore, its strength and cylindrical surface are treated accordingly, such as thickened, cylindrical chrome and so on. However, in practice, the first ring is still the same, and the piston ring under it breaks down. If we exclude the existence of various hidden dangers in the production process, we only analyze the causes of cracking from mechanical load, heat load and lubrication conditions.