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Multi-objective optimization of lubricant volume in an ELSD considering thermal effects
International Journal of Thermal Sciences ( IF 4.5 ) Pub Date : 2021-02-11 , DOI: 10.1016/j.ijthermalsci.2021.106884
Zhen Zhang , Xihai Jia , Tao Yang , Yili Gu , Weiwei Wang , Liqing Chen

Lubricant filling into a closed fluid domain of a transmission component has always been a challenge, for it is limited by a number of factors, like structural characteristics of a transmission component, load characteristics, and oil temperature of during an operation. This paper proposes a lubricant volume optimization model that takes into account the effect of temperature and heat, with an electronically controlled limited slip differential (ELSD) for an automobile taken as the study object. In the paper, an ELSD simulation model was firstly constructed, based on a CFD numerical simulation method. After model simplification and assumption, the probes were established for fluid speed and temperature parameters during gear rotation. The influence law of lubricant volume in the ELSD on convective heat transfer was then determined by analyzing the working conditions, including different rotational speeds and different oil immersion depths. Finally, the optimization model was constructed, with the numerical values after the steady-state temperature fluctuation and the time required for the fluctuation taken as evaluation indexes. In the study, by taking specific parameters for examples and based on the proposed optimization model, quadratic response surface method was used for equation fitting of multiple results obtained from the simulation, and the lubricant volume of 37.21% of the total volume was found to be optimal, which verified the feasibility of the model. The method provides a new approach for determining the lubricant volume for a transmission component.



中文翻译:

考虑热效应的ELSD中润滑剂量的多目标优化

将润滑剂填充到变速器部件的封闭流体域中一直是一个挑战,因为它受到许多因素的限制,例如变速器部件的结构特性,负载特性以及运行期间的油温。本文提出了一种润滑剂量优化模型,该模型考虑了温度和热量的影响,以汽车的电子控制限滑差速器(ELSD)为研究对象。本文基于CFD数值模拟方法,首先建立了ELSD仿真模型。经过模型简化和假设后,建立了齿轮旋转过程中流体速度和温度参数的探针。然后通过分析工作条件,包括不同的转速和不同的油浸深度,确定了ELSD中润滑剂量对对流换热的影响规律。最后,建立了优化模型,以稳态温度波动后的数值和波动所需的时间作为评价指标。在研究中,以具体参数为例,并基于所提出的优化模型,采用二次响应面法对模拟得到的多个结果进行方程拟合,发现润滑油量占总体积的37.21%。最优,验证了该模型的可行性。该方法提供了一种用于确定变速器部件的润滑剂量的新方法。

更新日期:2021-02-12
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