新型电机泵用湿式电机的搅油损失力矩研究

doi:10.3901/JME.2025.10.464

摘要/Abstract

摘要： 为去除电机泵泵轴上固有的动密封，提出一种简便易行的湿式电机新结构。基于湿式电机存在的搅油损失，为了研究其搅油机理，推导得出湿式电机搅油力矩损失的解析模型，将整个搅油损失分为三个部分计算，分别是周面摩擦阻力矩、推油阻力矩和端面摩擦阻力矩。基于CFD数值模拟研究转子在油液中旋转引起的流场分布及搅油损失机理。设计制作样机并搭建试验台架，测试不同转速下的搅油力矩。结果表明解析、数值及试验三者较为吻合，搅油力矩随转速的上升而增大。在转速12 000 r/min下，试验测得搅油力矩达到0.87 N·m，CFD模拟结果中推油阻力矩达到0.55 N·m，占总阻力矩的62%。表明在设计高速湿式电机时，应着重优化与推油阻力矩相关的结构参数。同时测试三组不同温度下的搅油力矩，发现随着温度升高，力矩会有小幅下降。研究结果对电机泵用湿式高速电机的搅油损失机理和减阻优化具有较好的指导意义。

关键词: 湿式电机, 搅油损失, 解析模型, CFD模拟, 电机泵

Abstract: In order to remove the dynamic seal inherent on the pump shaft of the motor pump, a new structure of a simple and easy to use wet motor is proposed. Based on the churning loss of the wet motor, the analytical model of the churning moment loss of the wet motor is derived in order to study the churning mechanism, and the churning loss is divided into three parts, namely, the circumferential frictional resistance moment, the pushing oil resistance moment and the end frictional resistance moment. Based on CFD numerical simulation, the flow field distribution and churning loss mechanism caused by rotor rotation in the oil are studied. A prototype is designed and built to test the churning torque at different rotational speeds. The results show that the churning torque increases with the increase of rotational speed. At 12 000 r/min, the churning torque is measured to be 0.87 N·m, and the CFD simulation results showed that the thrust resistance torque is 0.55 N·m, accounting for 62% of the total resistance torque. It is shown that when designing high-speed wet motors, emphasis should be placed on optimizing the structural parameters related to the thrust oil resistance torque. Three sets of churning torque at different temperatures are also tested, and it is found that there is a small decrease in torque as the temperature increases. The research results have good guidance for the churning loss mechanism and resistance reduction optimization of wet high-speed motors for motor pumps.

Key words: wet motor, churning loss, analytical model, CFD simulation, motor pump

中图分类号:

TH137

孟彬, 陈义, 张晨晨, 张震舟, 李胜, 阮健. 新型电机泵用湿式电机的搅油损失力矩研究[J]. 机械工程学报, 2025, 61(10): 464-478.

MENG Bin, CHEN Yi, ZHANG Chenchen, ZHANG Zhenzhou, LI Sheng, RUAN Jian. Study on the Churning Loss Torque of New Type of Wet Motor for Motor Pump[J]. Journal of Mechanical Engineering, 2025, 61(10): 464-478.

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