本文扼要地分析了采煤机重载齿轮的损伤形式和原因,指出盲目选用优质钢不仅价格贵,且工艺复杂,提出应根据齿轮实际工况合理选材的意见。关于提高齿轮寿命,作者结合多年工作实践,提出采用喷丸强化、修缘、挖根圆弧齿形等有效技术途径。文章对齿轮传动设计、制造,有一定指导意义。 This paper briefly analyzes the damage forms and causes of shearer heavy-duty gear, points out that the blind selection of high-quality steel is not only expensive, but also complicated in process, and puts forward the opinion that the material should be properly selected according to the actual working conditions. With regard to improving the service life of gears, the author put forward effective technical approaches such as shot peening, repair of edges and dug arc root tooth with many years of practice. Articles on the gear drive design, manufacturing, there is a certain significance.