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目前连杆静应力电测多数是在柴油机外的拉压试验机上进行(这样做,有时是必要的).这对于缺乏拉压试验机等设备的单位就有一定困难.特别是对大型、中型柴油机的连杆,所需拉压试验设备更为庞大.我们试采用了直接在柴油机上加静截进行连杆静应力电测的方案.试验结果表明:该方法是可行.可以使连杆的受力及约束状态更为接近柴油机的实际情况.试验时只要稍加注意就可以避免附加弯曲、扭转应力.能满足工程上测量精度要求.试验所需设备极少,易于自行解决.方法简单,易做.无论单缸、多缸、高速、低速、小型或大型发动机均可适用.本文主要介绍在一台高速小型双缸柴油机上进行连杆静应力实机测量的装置、方法和测量结果分析.
At present, most of the static test of connecting rod static stress is carried out on the tensile testing machine outside the diesel engine (in some cases, it is necessary), which is not suitable for the unit without the tensile testing machine, especially for the large, medium Diesel engine connecting rod, the required tension and compression test equipment more bulky.We try to use a direct diesel engine plus static intercept static stress test program.Experimental results show that: This method is feasible. Force and constraint state is more close to the actual situation of the diesel engine.As long as the attention of the test can be avoided additional bending, torsion stress to meet the engineering requirements of the measurement accuracy.Experimental equipment required few, easy to solve.Methods simple, It is easy to do.It is suitable for single cylinder, multi-cylinder, high speed, low speed, small or large engine.This paper mainly introduces the device, method and measurement result analysis of real machine measurement of connecting rod static stress on a high speed small twin cylinder diesel engine .