磁力耦合器散热盘传热特性分析与结构参数改进

Heat Transfer Characteristic Analysis and Structure Optimization Design of the Magnetic Coupling Heat Sink

以一台45kW双盘异步空冷式永磁涡流传动调速器为研究对象,采用仿真模拟的方法对该磁力耦合调速器散热盘热学特性进行了仿真计算与分析。结果表明,在设定条件下,铜转子模型温升梯度由铜转子中部沿径向外扩散,最高温度为53.3℃。选取散热结构中基板直径、厚度、翅片数量、高度与厚度为影响因素进行敏感度分析,在设定参数值内,基板厚度对铜转子最高温度影响敏感度较低,对模型总体质量影响敏感度较高;基板直径、翅片数量、翅片高度对铜转子最高温度影响敏感度较大,对模型总体质量影响敏感度较低;翅片厚度对铜转子最高温度几乎无影响,但对模型总体质量影响敏感度较高。基于敏感度分析结果,合理选取散热盘结构参数为基板直径380mm、翅片数量28片和翅片高度24mm,仿真结果表明,改进后铜转子模型最高温度为48℃,相比之前下降10.3%,优化后模型质量为16.6kg,相比之前增长12.1%。

In this paper,a 45kW double disc asynchronous air cooled permanent magnet eddy current transmission speeder is used as object of study,the simulation method is used for simulating calculation analysis of the magnetic coupling coil thermal characteristics.The results show that under the given conditions,the temperature rise of the copper rotor is spread from the center to the outside along its radius,the maximum temperature is 53.3℃.The diameter and thickness of substrate cooling plate,fin number,height and thickness are chosen as influential factors for sensitivity analysis,in the parameter range,the effect of substrate thickness on the maximum temperature sensitivity of copper rotor is low,the overall quality of the model sensitivity is higher;the effect of substrate diameter,fin number,fin height on its maximum temperature is higher,the effect on general quality of the model sensitivity is low;the fin thickness has little effect on the highest temperature of the rotor,but the impact on the overall quality of the model sensitivity is higher;based on the results of sensitivity analysis,the selected diameter of radiating base plate is 380mm,fin number is 28,the fin height is24mm,the results show that the maximum temperature of optimized copper rotor model is 48℃,it reduces 10.3%compared with the one before,the quality optimized model is 16.6kg,it increases by12.1%.