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一、往复式发动机的气密性 1.活塞环的漏气通路漏气间隙面积由以下三处组成: (1)在活塞环外园面和气缸滑动面,油压低于气体压力而出现的大的间隙,即接触不良或机油不足. (2)活塞环端面与环槽接触不良处. (3)活塞环接口处,接口间隙与活塞径向间隙的乘积以及接口倒角间隙. 上述三处的间隙,有效面积相同时,漏气量也相同,这是因为活塞环顶面和背面的气压几乎相同,并且和燃烧室的压力也大致相同的缘故.
First, the reciprocating engine air tightness 1. Piston ring leakage path leakage gap area consists of the following three components: (1) outside the piston ring and the cylinder sliding surface, hydraulic pressure appears below the gas pressure Large gap, that is, poor contact or lack of oil (2) piston ring end face ring groove bad contact (3) piston ring interface, the interface clearance and piston radial clearance product and the interface chamfer clearance. , The same amount of blow-by occurs when the effective area is the same, because the air pressures on the top and the back of the piston rings are almost the same and the pressure in the combustion chamber is about the same.