针对真空泵用驱动电机在极端真空环境工作时发热严重的问题，对真空泵用电机的冷却系统进行设计和分析。以1台2.9 kW屏蔽式异步电机作为研究对象，通过有限元软件建立机壳带有螺旋水路的电机三维模型，对其进行损耗计算。根据螺旋水道的流速和压强分布验证了水道尺寸设计的合理性，并对电机各部分温度分布情况进行仿真分析。根据电机在二倍额定负载和冷却水故障条件下的温度变化情况来分析电机能安全运行的时间。最后对样机进行了温升试验，将得到的测试结果和仿真结果进行对比分析，验证了机壳带有螺旋水道的冷却系统对真空干泵驱动电机具有一定的冷却效果，为极端真空环境下真空泵用驱动电机的进一步研究提供科学依据。

In view of the serious heating problem of drive motor for vacuum pump in extreme vacuum environment, the cooling system of the drive motor for vacuum pump is designed and analyzed. A 2.9 kW shielded asynchronous motor is taken as the research object. The three-dimensional model of the motor with spiral waterway is established by finite element software, and the loss is calculated. According to the velocity and pressure distribution of spiral waterway, the rationality of waterway size design is verified, and the temperature distribution of each part of the motor is simulated and analyzed. According to the temperature changes of the motor under double rated load and cooling water fault conditions, the safe operation time of the motor is analyzed. Finally, the temperature rise test of the prototype is carried out, and the test results and simulation results are compared and analyzed. It is verified that the cooling system with spiral channel in the shell has a certain cooling effect on the drive motor for the vacuum dry pump, which provides a scientific basis for the research of the drive motor for vacuum pump in the extreme vacuum environment in the future.

TM 358

国家科技重大专项项目（2017ZX02201005-002）