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一、发展概况随着科学技术的发展,对机械传动提出了相应的要求,归纳起来,主要是:大的传动比小的体积,轻的重量,高的精度。此外,对有些装置还要求能在高的真空度和有介质辐射的情况下工作。如某人造卫星的一个恒速传动装置,其传动比为111,重量为544克,外形轴向尺寸为59.2毫米,传动精度可达12弧秒,能在真空度为10~(-7)～10~(-8)毫米汞柱和介质辐射的
First, the development profile With the development of science and technology, the mechanical transmission made the corresponding requirements, summed up, mainly: a large transmission ratio of small size, light weight, high precision. In addition, some devices are also required to work with high vacuum and with dielectric radiation. Such as a satellite of a constant speed transmission, the transmission ratio of 111, weight 544 grams, the shape of the axial size of 59.2 mm, transmission accuracy of up to 12 arc seconds, the vacuum degree of 10 ~ (-7) ~ 10 ~ (-8) mm Hg and medium radiation