Investigation on Heat Transfer Performance of Loop Thermosyphon for Inner Cooling of Motorized Spindle

doi:10.7652/xjtuxb201707014

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Investigation on Heat Transfer Performance of Loop Thermosyphon for Inner Cooling of Motorized Spindle

更新时间：2025-07-09

- Investigation on Heat Transfer Performance of Loop Thermosyphon for Inner Cooling of Motorized Spindle
- Vol. 51, Issue 7, Pages: 90-97(2017)
- 作者机构：
  
  西安交通大学机械制造系统工程国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201707014
  CLC： TH161
- Online First：10 July 2017，
  
  Published：2017
- 稿件说明：
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Investigation on Heat Transfer Performance of Loop Thermosyphon for Inner Cooling of Motorized Spindle[J]. 2017, 51(7): 90-97.
DOI：

Investigation on Heat Transfer Performance of Loop Thermosyphon for Inner Cooling of Motorized Spindle[J]. 2017, 51(7): 90-97. DOI： 10.7652/xjtuxb201707014.

摘要

为了加强电主轴轴心冷却、减小电主轴的热变形

以150SD型磨削电主轴转子为对象

采用单环路热虹吸管来冷却主轴轴心

利用环路热虹吸管无需外部动力及传热效率极高的特征

从原理上避免了“动密封”问题对电主轴轴心冷却的困扰。对高离心力作用下单环路热虹吸管内传热工质的流动及传热状态进行了理论分析; 以正戊烷为工质

对适用于该主轴轴心冷却尺寸的环路热虹吸管的传热特性进行了实验研究

并对其应用于电主轴轴心冷却的实际效果进行了预测。结果显示:在文中的实验工况下

单环路热虹吸管的运行温度稳定

其传热性能在充液率为60%左右时达到最佳

热阻仅为0.57 ℃/W; 当采用4根单环路热虹吸管冷却结构时

150SD型磨削电主轴转子的最大温升为28.5 ℃

且这一温升数值随着转速的增加而继续减小

表明单环路热虹吸管在电主轴轴心冷却方面具有良好的应用效果。

Abstract

Taking the inner cooling of 150SD grinding motorized spindle as the application background

an innovative cooling method based on the single-loop thermosyphon with high heat transfer efficiency and without external power supplier is suggested

which could avoid the troublesome rotary seal problem on the inner cooling for spindle shafts. In view of the fact that loop thermosyphon is suitable for the cooling space of the spindle shaft

n-pentane is used as the working medium

and the theoretical analysis on the flow and heat transfer characteristics of the working medium in a single-loop thermosyphon under high centrifugal force is conducted

then an experimental study on the heat transfer performance is carried out. The results show that the operating temperature of the single-loop thermosyphon is stable under the experimental condition and the heat transfer performance reaches its peak value when the filling rate is 60%

and the corresponding thermal resistance is only 0.57 ℃/W. The temperature rise of rotor in 150SD grinding motorized spindle is 28.5 ℃

and the temperature rise continuously decreases with the increase of rotary speed. Therefore

the single-loop thermosyphon may have promising application to the inner cooling of motorized spindles.

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references

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