热管滚珠丝杠热性能仿真和实验

doi:10.3969/j.issn.1004-132X.2020.20.007

摘要/Abstract

摘要： 针对传统液冷散热滚珠丝杠存在的丝杠表面温度梯度及温度波动性较大、达到热平衡时间较长等问题，设计了内置热管的新型滚珠丝杠。选择热管丝杠充液介质并计算其结构尺寸参数；为验证热管丝杠热性能，提出了含管壁层、冷凝回流层、蒸气腔层的热管丝杠分层等效模型并对其进行仿真；分析螺母位于不同位置时丝杠表面的温度分布，并与传统液冷丝杠散热性能进行对比分析；采用沸腾排气法制备热管丝杠，搭建实验台，测试热管丝杠表面温度并与仿真结果进行对比。研究结果表明，相对传统的液冷散热丝杠，热管丝杠表面具有较小的温度梯度，温度均匀性良好，且达到热平衡的时间短，仿真与实验结果一致，验证了仿真方法的有效性。

关键词: 热管, 滚珠丝杠, 均温性能, 数值模拟

Abstract: A new type of ball screw with built-in heat pipes was designed to solve the problems of high temperature gradient, fluctuation on the surfaces of the screw and long time to reach the heat balance in the traditional liquid-cooled heat dissipation ball screws. The liquid filled medium of heat pipe ball screws was chosen and the structural dimensional parameters were calculated. To verify the thermal performance, the finite element model of the heat pipe ball screws with tube wall layer, liquid reflux layer and steam chamber layer was established, and the hierarchical equivalent model was used to simulate the heat pipe parts of the ball screws. The temperature distribution on the surfaces of the screws was analyzed when the nuts were located in different positions, and the thermal performance of the screws was compared with that of the traditional liquid-cooled screws. The heat pipe ball screw was prepared by boiling exhaust method. The experimental platform was built to test the surface temperature of the heat pipe ball screws and the results were compared with the simulation ones. The results show that the surfaces of the heat pipe ball screws have smaller temperature gradient, better temperature uniformity and shorter time to achieve thermal balance than that of the traditional liquid cooling heat dissipation ball screws. The simulation results are in agreement with the experimental ones, which verifies the effectiveness of the simulation method.

Key words: heat pipe, ball screw, uniform temperature performance, numerical simulation

中图分类号:

胡冕;丁晓红. 热管滚珠丝杠热性能仿真和实验[J]. 中国机械工程, DOI: 10.3969/j.issn.1004-132X.2020.20.007.

HU Mian;DING Xiaohong. Numerical and Experimental Investigations of Thermal Performance for Heat Pipe Ball Screws[J]. China Mechanical Engineering, DOI: 10.3969/j.issn.1004-132X.2020.20.007.

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链接本文: http://www.cmemo.org.cn/CN/10.3969/j.issn.1004-132X.2020.20.007

http://www.cmemo.org.cn/CN/Y2020/V31/I20/2445

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