我厂主要产品之一KCB—300型齿轮油泵,与电机用弹性连轴器相连接,几年来一些用户反映,联轴器在泵负荷偏大时,根部发生断裂。我们找出了断裂的原因是原设计的防松槽是一个危险截面,经核算,强度超过了许用值。若用增大联轴器的外径或改变材料来解决,在成本上不经济,而且外形又大 KCB-300 gear pump, one of the main products of our factory, is connected with the elastic connecting shaft of the motor. In recent years, some users have reported that the coupling ruptures at the root when the pump load is too large. We found the reason for the fracture is that the original design of the anti-loose slot is a dangerous section, after calculation, the strength exceeds the allowable value. If you increase the outer diameter of the coupling or change the material to solve, the cost is not economical, and the shape is large