面向结构参数的滚珠丝杠副动态接触角建模

为研究滚珠丝杠副结构参数对接触角的影响,基于Hertz理论和滚道控制理论,综合考虑滚珠、螺母和丝杠滚道的结构参数,以间隙、公称直径、滚珠直径、螺旋升角及滚珠数量作为变量,建立滚珠丝杠动态接触角模型,得到面向结构参数的接触角非线性方程组,给出采用Newton-Raphson法进行迭代求解的流程。基于动态接触角模型进行讨论和实例分析,研究不同工况下的结构参数对滚珠丝杠副动态接触角的影响规律。结果表明:工作中的滚珠丝杠副丝杠侧的内接触角始终大于螺母侧外接触角;滚珠与滚道间隙量增大0.1 mm,内、外接触角增大约7°;公称直径增加则外接触角减小、内接触角增大;滚珠直径和滚珠数量的增大会导致外接触角减小...

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Bibliographic Details
Published in农业工程学报 Vol. 32; no. 4; pp. 98 - 104
Main Author 李梦奇 庾辉 李冬英 王斌 张根保
Format Journal Article
LanguageChinese
Published 邵阳学院机械与能源工程系,邵阳,422000%邵阳学院机械与能源工程系,邵阳 422000 2016
重庆大学机械工程学院,重庆 400044%重庆大学机械工程学院,重庆,400044
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ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2016.04.014

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Summary:为研究滚珠丝杠副结构参数对接触角的影响,基于Hertz理论和滚道控制理论,综合考虑滚珠、螺母和丝杠滚道的结构参数,以间隙、公称直径、滚珠直径、螺旋升角及滚珠数量作为变量,建立滚珠丝杠动态接触角模型,得到面向结构参数的接触角非线性方程组,给出采用Newton-Raphson法进行迭代求解的流程。基于动态接触角模型进行讨论和实例分析,研究不同工况下的结构参数对滚珠丝杠副动态接触角的影响规律。结果表明:工作中的滚珠丝杠副丝杠侧的内接触角始终大于螺母侧外接触角;滚珠与滚道间隙量增大0.1 mm,内、外接触角增大约7°;公称直径增加则外接触角减小、内接触角增大;滚珠直径和滚珠数量的增大会导致外接触角减小、内接触角先减小后增大;螺旋升角对接触角影响很小,内、外接触角变化幅值均不到0.006°。该研究为滚珠丝杠副结构尺寸优化、动态特性分析、提高设计精度提供了参考。
Bibliography:Li Mengqi, Yu Hui, Li Dongying, Wang Bin, Zhang Genbao (1. Department of Mechanical and Energy Engineering, Shaoyang University, Shaoyang 422000, China; 2. College of Mechanical Engineering, Chongqing University, Chongqing 400044, China)
11-2047/S
contact angle;measurements;models;ball screw mechanism;structure parameters;geometric parameters
Ball screw mechanism is one of the key parts in mechanical and electronic products especially in precision machineries due to its high transmission efficiency, long service life and high precision, high carrying capacity and positioning accuracy,which is determined by the contact angle formed between nut and screw. Aimed at the current problems in universal and limited application, which resulted from the specific structure parameters, this paper establishes the relationship between contact angle and ball screw’s structure parameters, as well as the model of the dynamic contact angle of ball screw mechanism combined with the geometric parameters of the ball and the raceway
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2016.04.014