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一、前言齿轮承载后所产生的工作应力,是随载荷变化而引起的接触和弯曲变应力及摩擦力。值得注意的是齿轮安装误差,制造工序中精度破坏,结果使传动齿轮存在超过额定载荷值的附加载荷。英国曾对采煤机截割传动部件的齿轮进行测定及研究,证明失效的工作载荷有时达到主电动机额定功率的7倍。汽车、电力机车牵引齿轮的实际应力也达到正常载荷的5～8倍。这说明了齿轮承载的离散性。于是国内外都在积极寻求较为符合实际的齿轮强度计算途径及提高齿轮承载能力的措施。如尽量减少齿
I. Foreword Work stress generated by the gear bearing is the contact and bending stress and friction caused by the change of load. It is noteworthy that the gear installation error, the accuracy of the manufacturing process destroyed, as a result of the existence of transmission gear over the rated load value of the additional load. In the UK, the measurement and study of the gears of shearer cutting transmission components proved that the failed working load sometimes reached 7 times the rated power of the main motor. Automotive, electric locomotive traction gear actual stress also reached normal load of 5 to 8 times. This shows the discreteness of the gear load. So both at home and abroad are actively seeking more realistic ways to calculate the strength of the gear and measures to improve the carrying capacity of gear. Such as minimizing teeth