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国营诺伊尔哈根合理化修理厂对使用过的活塞的磨损状况进行了一次调查,调查结果是:在4VD14.5/12—1型发动机中,用过的单金属活塞的74.9%超过了上环槽的工作极限尺寸,32.9%的活塞销孔超过了工作极限尺寸,其它损坏,如断裂、伤痕、裂缝和拆装损伤等占48.1%,44.2%的活塞可以修复。对使用后更换下来的镶有环槽骨架的活塞(Ringtr(?)gerkolben)的调查结果是:上环槽需修复的活塞占26.2%,上环槽和活塞销孔需修复的占52.5%,不能修复的(如断裂、伤痕、裂缝、拆装损伤和烧痕)占21.3%。因此需修复的占78.7%。对上环槽的修复采取如下方法,这些方法经实践证明是可行的。
The state-run Neuer Hagan rationalized repair shop conducted a survey of worn piston wear and found that in the 4VD14.5 / 12-1 engine, 74.9% of the used single-metal pistons exceeded The working limit of the ring groove size, 32.9% of the piston pin hole exceeds the working limit size, other damage such as fracture, scar, crack and disassembly injury accounted for 48.1%, 44.2% of the piston can be repaired. Findings of the ring-grooved piston (Ringtröck gerkolben) replaced after use were as follows: 26.2% of the pistons in the upper ring groove were repaired, 52.5% of the upper ring groove and piston pin holes were repaired, Can not be repaired (such as fracture, scar, crack, disassembly damage and burn marks) accounted for 21.3%. Therefore need to repair accounted for 78.7%. The following methods are used for the repair of the upper ring groove. These methods have been proven to be feasible.