多缸柴油机曲轴平衡重的合理配置

在外部平衡性能良好的曲轴上加装平衡重，通常是为了减小曲轴所受弯矩，但平衡重的安装将影响主轴承载荷的大小和分布。经过大量计算求得了一个工作循环中轴承载的最大值，平均值及其比值随平衡重增大而变化的规律。由此得出，合理的重配置应使轴承载荷的最大值达到最小。基地此结论导出了几组平衡重计算公式。文末还给出了算便。

Reasonable Disposition of Counterweights for Crankshaft of Multi-Cylinder Diesel Engine

The external balance of multi-cylinder diesel engine is better, but the counterweights is usually installed on the crankshaft for reducing the bending moment on it. However, the magnitude and distribution of the main bearing load will be influenced by the counterweights. In this article, a change regularity of maximum and average values as well as their ratio of the bearing load with theincreasing counterweights in one working cycle of the engine is obtained through a large quantities of calculation. In view of the regularity, it is concluded that reasonable disposition of crankshaft counterweights should minimise the maximum load on the main bearing. Based on above-mentioned conclusion, therefore, several sets of formula for calculating counterweights are deduced. A calculating example is also given in the paper.