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现代煤矿机械制造的特点是机器技术参数的完善和功率的加大。最近15～20年期间,掘进机的电动机功率增加了2.3倍,采煤机的电动机功率增加了4～6倍。加大功率导致煤矿机械的元部件受力的提高,而这些元部件的外形尺寸並没有多少变化。它首先涉及到机械传动装置的零部件,特别是传动齿轮;同时还受到煤矿机械及其齿轮传动的具体使用条件所引起的其他因素的影响,如机器尺寸的限制,被破碎物的磨损性以
Modern coal mine machinery manufacturing is characterized by the improvement of machine technical parameters and increase power. In the recent 15 to 20 years, the motor power of roadheaders increased 2.3 times and the motor power of shearer increased 4 to 6 times. Increasing the power lead to the mechanical components of coal mining machinery to enhance the force, and the dimensions of these components did not change much. It first involves the mechanical transmission components, especially the transmission gear; also affected by the specific conditions of use of coal mining machinery and gear drive caused by other factors, such as the size of the machine restrictions on the wear and tear of the material to be broken