基于流固耦合模型的永磁耦合器导体铜盘散热研究

Research on Heat Dissipation of Conductor Copper Disk of Permanent Magnet Coupler Based on Fluid-Structure Coupling Model

针对永磁耦合器在运行时导体铜盘侧产热较大而使装置无法正常工作的问题,提出一种能够有效提高导体铜盘散热能力的结构。首先,基于流固耦合数学模型和传热学理论方程,通过有限元仿真计算了不同转差及不同气隙长度下的永磁耦合器的导体铜盘温度分布,并将仿真结果与试验测试结果进行对比,验证了仿真计算方法的准确性。其次,针对导体铜盘温升过高,热量无法导出的问题,提出一种在端盖外侧添加导风散热片的结构,并仿真分析不同形状的散热片对散热效果的影响。最后,仿真分析了导风散热片的高度、厚度以及数量对导体铜盘温升的影响,进而得到导风散热片设计参数的最优区间,为永磁耦合器的风冷散热结构设计提供了科学依据。

Aiming at the problem that the permanent magnet coupler produces a large amount of heat on the copper plate side of the conductor during operation and the device cannot work normally,a structure that can effectively improve the heat dissipation capacity of the conductor copper plate is proposed.First,based on the fluid-solid coupling mathematical model and the theoretical equations of heat transfer,the temperature distribution of the conductor copper plate of the permanent magnet coupler under different slips and different air gap lengths is calculated through finite element simulation,and the simulation results are compared with the experimental test results.The comparison verifies the accuracy of the simulation calculation method.Second,in view of the problem that the temperature of the conductor copper plate is too high and the heat cannot be dissipated,a structure with air guide heat sink added to the outside of the end cover is proposed,and the influence of heat sinks of different shapes on the heat dissipation effect is simulated and analyzed.Finally,the influences of the height,thickness and quantity of the air guide heat sinks on the temperature rise of the conductor copper plate are analyzed,and the optimal ranges of the design parameters of the air guide heat sink are obtained,providing scientific basis for the design of the air cooling heat dissipation structure of the permanent magnet coupler.