高速运转齿轮的主要尺寸之确定,大半是根据经验上的数据,而不是靠理论上的计算;因此选择传动尺寸应根据齿轮实际上的比例进行。模数之标准系列的选择当圆周速度和齿形的尺寸很大时(在大模数时),轮齿上的滑动速度变得极大。在滑动速度最大之处,将产生大量的摩擦热。这些熟量使润滑油变稀,并将它挤出,结果就使轮齿的磨损大为增加。为了达到高速运转齿轮啮合的平稳性和避免轮齿的急剧磨损,必须依靠增大弯曲应力而采用小模 The determination of the main dimensions of a high-speed running gear is based on empirical data rather than theoretical calculation; therefore, the selection of the transmission size should be based on the actual ratio of the gear. Selection of Standard Series of Modulus When the circumferential speed and profile size are large (at large modulus), the sliding speed on the gear tooth becomes extremely large. At the maximum sliding speed, a lot of frictional heat will be generated. These familiar quantities make the lubricant thinner and squeeze it out, resulting in greatly increased gear wear. In order to achieve the smooth operation of high-speed gear meshing and to avoid the sharp wear of gear teeth, we must rely on increasing the bending stress and using small mold