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柴油发动机工作一定时间后,连杆小头铜套与活塞销之间以及连杆大头轴瓦与连杆轴颈之间的配合间隙,都会因磨损而增大,严重时发动机将出现敲击声,甚至出现烧瓦和捣缸事故。为了防止发动机发生事故,除定期检查上述配合件的磨损情况和配合间隙外,如果活塞顶部有“ω”型凹穴的话,也可以在更换缸垫时,用手抠住凹穴向上拽动,以对上述配合间隙进行粗测。现以ST4450型柴油机为例说明其测量方法。 (1)将各缸套内部的积炭清除干净。
Diesel engine work for a certain period of time, connecting rod small copper sleeve and piston pin and connecting rod between the big bearing bush and the connecting rod between the neck gap, will increase due to wear and tear, the engine will be severe percussion, Even burning and smashed cylinder accident. In order to prevent engine accidents, in addition to regularly check the wear of the mating parts and with the gap, if the top of the piston with “ω ” type of pocket, you can also replace the cylinder pad, Move, in order to carry on rough test to the above-mentioned coordination gap. Now ST4450 diesel engine as an example to illustrate its measurement method. (1) Clean the coke inside the cylinder liner.