高速电主轴功率流模型与热态特性研究

Power Flow Model of High-speed Motorized Spindles and Its Thermal Characteristics

摘要:

根据能量守恒定律建立了高速电主轴功率流模型，研究了电动机电磁损耗、轴承摩擦损耗和风阻损耗之间的关系，并且通过实验测量2ZDG60型高速电主轴运行过程中的电磁损耗参数，对此模型进行验证，其理论计算结果与实验结果吻合度较高。在此基础上，对2ZDG60型高速电主轴进行了热态有限元仿真，分析其不同转速下的温升分布，其中在集中产热区域轴承和电动机处温升较高，测量前轴承外圈以及壳体前部、中部、后部的温升情况，实验数据与仿真数据相比误差较小，进一步验证了高速电主轴功率流模型的准确性

Abstract:

Based on the law of energy conservation, a power flow model of high-speed motorized spindles was presented. Quantitative power loss models of the built- in motor, bearings and air were developed. An experiment on the 2ZDG60 motorized spindle was carried out under several operating conditions. The good agreement between the theoretical results and the experimental data indicated that the power flow model was capable of accurately predicting the power loss of high-speed motorized spindles. And on all these points, the thermal simulation data of 2ZDG60 motorized spindle showed that the temperature rose on the areas of bearings and motor was higher. The little error of testing data and simulation data of temperature rise proved the correctness of the power flow model.