滚珠蜗杆传动的研究
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摘要
探索研究用滚动摩擦代替滑动摩擦的新型蜗杆传动结构型式,是提高蜗杆传动效率的一条有效途径。本文对滚珠蜗杆传动进行了初步的研究,主要的研究内容如下:
     首先,介绍了以滚动摩擦为主的几种蜗杆传动的结构型式的设计方案,综合比较了这几种蜗杆传动结构型式的特点。研究结果表明滚珠蜗杆传动结构型式具有研制开发价值和应用前景。
     其次对目前各种结构型式设计方案的滚珠蜗杆传动的结构特点进行了分类研究。结果表明,与传统蜗杆相比,滚珠蜗杆的承载能力相对较小且存在滚珠不畅的问题。
     再次,运用共轭曲面原理,建立了滚珠蜗杆传动的蜗杆、蜗轮的齿面方程。推导了一类、二类界限曲线,估算了滚珠蜗杆的传动效率,推导了设计滚珠蜗杆所必需的参数公式。
     最后,借鉴了滚珠丝杠及角接触球轴承承载能力的计算方法,采用Lundberg-Palmgren理论对滚珠蜗杆的承载能力计算进行了研究,得出了滚珠蜗杆传动承载能力的计算公式。基于遗传算法对滚珠蜗杆传动进行了参数优化设计,较为有效地提高了滚珠蜗杆传动的承载能力。
It is an effective way to improve the transmission efficiency of worm to explore and reseach the new type of worm structure which replaces the sliding friction with rolling friction. This paper has conducted a preliminary study of the ball globoid worm. The main contents are as follows.
     First,the paper has introduced several designs of worm struction which mainly depends on rolling friction and has compared comprehensively the features of the worm structure forms. The resulits show that the ball globoid worm gear driving device (BGWGDD) has more developable values.
     Secondly,the paper has studied the category of BGWGDD at present.The results show that the carrying power of BGWGDD is smaller and has the problem that the cycle of balls is sluggish, compared with the traditional worm.
     Moreover,the worm and worm wheel gear surface equation of the BGWGDD are established by using the principle of conjugation of curved surface. Two kinds of border curve are also deduced. The paper has estimated the transmission efficiency of BGWGDD and has deduced the necessary parameters for the design of BGWGDD.
     Finally, On the basis of the calculation method of ball screw and angular contact ball bearing and Theory of Lundberg-Palmgren,the paper has studied the bearing capacity of BGWGDD. Based on genetic algorithm, the paper has optimized the design parameters. It is more effective to raise the bearing capacity of BGWGDD.
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