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在农业机械使用中,一些故障现象怪异,给故障诊断带来困惑。其实,这些怪异的现象都是故障的另一种表现。故障1冷机能启动,热机反而难启动这表明热机时有汽缸漏气或配合件热胀卡死现象。其原因有以下几方面。(1)活塞与活塞环边间隙过小。当新更换的活塞环过厚或活塞环槽内有胶质积碳时,热机时由于机件膨胀,活塞环挤在环槽内而卡死,失去弹性,起不到密封作用,导致汽缸漏气而难启动。
In the use of agricultural machinery, some of the strange phenomenon of the fault diagnosis to bring confusion. In fact, these weird phenomena are another manifestation of failure. Failure 1 cold machine can start, but difficult to start the heat engine This shows that the engine heat cylinder leakage or with the phenomenon of thermal expansion stuck. The reasons for the following aspects. (1) piston and piston ring side clearance is too small. When the newly replaced piston ring is too thick or the piston ring groove with plastic carbon deposition, the engine heat due to mechanical expansion, the piston ring squeezed in the ring groove and stuck, loss of elasticity, can not seal, resulting in cylinder leakage Gas and difficult to start.