Equivalent thermal conductivity of heat pipes
Equivalent thermal conductivity of heat pipes
复制标题
热管的等效导热系数
DOI：
10.1007/s11465-008-0087-1
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Binghui Ma
中科院分区：
文献类型：
--
作者：
Z. Lu;Binghui Ma
在精密加工中，由热变形引起的加工误差占总误差的很大比例。如果精密加工工具能够快速传递热量，将减少热变形，提高加工精度。基于内工液相变的热管传热效率高，在航天、化工等领域得到广泛应用。在力学中，热管的应用相对较少。在静压电主轴上施加热管时，由于在力学上的特殊应用需要首先提供导热系数或等效导热系数，因此在传热过程中无法解决热变形问题。建立了基于等效热阻的等效导热系数模型。为了验证等效导热模型的有效性，对筛网芯管、重力管和旋转热管进行了性能测试。该模型为电主轴热管的热变形分析提供了一种计算方法。
In precision machining, the machining error from thermal distortion carries a high proportion of the total errors. If a precision machining tool can transfer heat fast, the thermal distortion will be reduced and the machining precision will be improved. A heat pipe working based on phase transitions of the inner working liquid transfers heat with high efficiency and is widely applied in spaceflight and chemical industries. In mechanics, applications of heat pipes are correspondingly less. When a heat pipe is applied to a hydrostatic motorized spindle, the thermal distortion cannot be solved during the heat transfer process because thermal conductivity or equivalent thermal conductivity should be provided first for special application in mechanics. An equivalent thermal conductivity model based on equivalent thermal resistances is established. Performance tests for a screen wick pipe, gravity pipe, and rotation heat pipe are done to validate the efficiency of the equivalent thermal conductivity model. The proposed model provides a calculation method for the thermal distortion analysis of heat pipes applied in the motorized spindle.