Purpose

The lubrication of the high-speed reducer of an electric vehicle is investigated. The specific contents include visualization of the flow field inside reducer, lubrication evaluation of bearings and efficiency experiment.

Design/methodology/approach

The flow field inside reducer at five working conditions: straight, uphill, downhill, left lean and right lean is simulated by smoothed particle hydrodynamics (SPH). According to the instantaneous number of particles through bearings, the lubrication states of bearings are evaluated. The test platform is set up to measure the efficiency of the reducer.

Findings

The flow field inside the reducer is obtained, the lubrication of bearings needs to be improved, the efficiency of the electric vehicle reducer meets the requirement.

Originality/value

The SPH method is used to simulate lubrication instead of using the traditional grid-based finite volume method. A novel method to evaluate the lubrication of bearings is proposed. The method and conclusions can guide electric vehicle reducer design.

中文翻译：

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电动汽车高速减速器润滑的仿真与实验研究

目的

研究了电动汽车的高速减速器的润滑。具体内容包括减速器内部流场的可视化，轴承的润滑评估和效率实验。

设计/方法/方法

减速器内部的流场在五个工作条件下：直线，上坡，下坡，左倾斜和右倾斜通过平滑粒子流体动力学（SPH）进行模拟。根据通过轴承的瞬时颗粒数，评估轴承的润滑状态。建立测试平台以测量减速器的效率。

发现

获得了减速器内部的流场，需要改善轴承的润滑，电动汽车减速器的效率达到了要求。

创意/价值

SPH方法用于模拟润滑，而不是使用传统的基于网格的有限体积方法。提出了一种评估轴承润滑性能的新方法。该方法和结论可指导电动汽车减速器的设计。