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介绍三相异步电机-轴向柱塞式电液泵(EHP)的集成结构与工作原理,计算电液泵机械损耗,在Ansoft软件中建立电液泵电机模型,仿真分析电液泵的电磁损耗,并在此基础上建立有限元耦合模型,借助Fluent软件仿真分析液压油在壳体内腔的流动与温度分布状态,以及关键零部件的温度分布。有限元分析结果表明,液压油可以在流道内充分流动,并且额定工作状态下,当进口液压油温度为35℃时,电机定子最高温度不超过58℃,转子最高温度不超过40℃,散热效果好于传统电动机-泵组。针对定子内部温度较高的现象,研究了定子四周打4个直径10 mm的通孔后的温度分布情况,并与打孔前进行了对比,结果表明,打孔后电机定子最高温度降低了0.6℃,局部区域温度降低超过3℃,散热效果改善明显。
This paper introduces the integrated structure and working principle of three-phase asynchronous motor-axial piston electro-hydraulic pump (EHP), calculates the mechanical loss of the electro-hydraulic pump, establishes the electro-hydraulic pump motor model in Ansoft software and simulates the electro-hydraulic pump electromagnetic loss Based on this, a finite element coupled model is established. The flow and temperature distribution of the hydraulic oil in the cavity of the housing and the temperature distribution of the key components are simulated by Fluent software. The results of finite element analysis show that the hydraulic oil can flow fully in the flow passage. Under the rated working condition, when the inlet hydraulic oil temperature is 35 ℃, the maximum temperature of the stator of the motor does not exceed 58 ℃ and the maximum temperature of the rotor does not exceed 40 ℃. Better than the traditional motor - pump group. Aiming at the phenomenon that the stator internal temperature is higher, the temperature distribution of four holes 10 mm in diameter around the stator is studied and compared with that before drilling. The results show that the maximum temperature of the stator after drilling is reduced by 0.6 ℃, the temperature in some areas is reduced by more than 3 ℃, the cooling effect is obviously improved.