液力缓速器叶片倾角敏感度分析及优化  

Sensibility Analysis and Optimization on Vane Degree of Hydraulic Retarder

作　　者：李昊[1] 任晓慧[1] 

机构地区：[1]燕山大学车辆与能源学院,河北秦皇岛066004

出　　处：《液压与气动》2016年第3期43-48,共6页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51375422);燕山大学博士基金(B796)

摘　　要：以某企业生产的液力缓速器产品为参考样机,建立了流场计算三维几何模型,基于CFD平台对缓速器内流场进行了三维数值模拟。由数值计算结果可知,循环圆流道内出现壁面脱离现象,弦面内产生不利于产生恒定制动转矩的涡旋。为提高缓速器的制动性能,对叶片倾角进行敏感度分析并提出不同优化方案,通过束流理论计算和流场数值模拟确定了最佳倾角值。通过对优化前后不同转速下制动力矩的对比,表明优化后液力缓速器制动性能得到了明显提高。In this paper, the three-dimensional geometric model of hydraulic retarder is built based on an enterprise production as reference prototype, On CFD platform, based on the three-dimensional entity model of the hydraulic retarder, the internal flow field at full-filling condition is simulated and the braking performance is calculated. The simulation results show that there were some problems such as vast vortexes and wall flow separations which added braking torque losses. In order to improve the braking torque, this paper built some schemes with different vane de- grees, after calculating and simulating, got the best optimization scheme. The simulation results show that, com- pared with the optimization schemes and the prototype, the braking performance of hydraulic retarder is obviously improved.

关 键 词：液力缓速器 叶片倾角 敏感度分析 流场特性 制动力矩 

分 类 号：TH137[机械工程—机械制造及自动化]