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12180Z柴油机用喷油泵的出油阀弹簧(图1)在工作中经常折断,轻者致使柴油机相应气缸工作不正常,严重时使出油阀蹩断,断裂的弹簧碎块进入柱塞腔内导致偶件卡死。因此,出油阀弹簧工作可靠与否,对柴油机乃至机车的工作可靠性都有一定的影响。为了在现有结构条件下不影响零件的互换性,曾对原设计结构的弹簧采用不同的材料及不同的热处理工艺在疲劳试验机上进行对比试验,并把部分弹簧进行了装车试验。试验用的出油阀弹簧由半自动卷簧机卷制,两端头不用火焰加热并头,严格按图纸要
12180Z diesel engine fuel pump out valve spring (Figure 1) often break in the work, the light led to the corresponding cylinder of the diesel engine is not working properly, so that the oil valve rupture, broken spring fragments into the plunger chamber lead to Couple stuck. Therefore, the output valve spring reliable or not, the reliability of diesel engines and locomotives have a certain impact. In order to not affect the interchangeability of parts under the existing structural conditions, the spring of the original design structure was tested on a fatigue testing machine using different materials and different heat treatment processes, and some of the springs were tested for loading. The test valve spring by the semi-automatic coil spring roll, both ends without flame heating and head, in strict accordance with the drawings to