Sensitivity Analysis of Worm Gear of Satellite Antenna Deployment Mechanism with Different Assembly Errors
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摘要: 蜗杆传动副是某星载天线展开机构驱动链路的末级传动副,在天线展开过程中承受的负载最大,其可靠性是决定整个天线展开成败的关键,之前在地面试验中曾多次发生齿面异常磨损的现象。为了通过控制装配误差降低蜗杆传动副的接触应力,提高产品工作可靠性,开展了装配误差对蜗杆传递副齿面接触应力的敏感性研究。首先建立了蜗杆传动副的三维多齿接触有限元模型,然后依据中心距偏差、中间平面偏差和轴交角偏差3种安装误差值进行了分工况处理,形成5种工况;最后对5种工况下的接触应力进行了分析,得出轴交角安装误差对蜗杆传动的接触应力影响最为严重的结论。Abstract: The worm drive is last stage reduction gear of one antenna deployment mechanism, and the load beared by the worm gear is the maximum. The reliability of worm gear is critical for the successful deployment of the antenna. In order to improve the reliability of mechanism by controlling the worm assemble errors, this paper studies the contact stress sensitivity to different assemble errors. First, the 3D tooth contact FE model of worm gear is established. Then based on three kinds of errors for worm assembling and according to the center distance deviation, middle plane deviation and axis angle deviation, five work conditions are formed. Finally, the contact stress for each work condition were analyze, results demonstrate that the axis angle deviation will affect contact tress most seriously.
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Key words:
- deployment mechanism /
- worm drive /
- assemble errors /
- sensitivity analysis
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