基于结构参数相关性的液力缓速器优化设计  

Optimization Design Based on Correlation of Structural Parameters for Hydraulic Retarder

作　　者：刘春宝[1,2] 盛闯 李雪松[2] LIU Chunbao;SHENG Chuang;LI Xuesong(School of Mechanical Science and Engineering, Jilin University, Changchun, Jilin130022;State Key Laboratory of Automobile Simulation and Control, Jilin University, Changchun, Jilin130022)

机构地区：[1]吉林大学机械科学与工程学院,吉林长春130022 [2]吉林大学仿真与控制国家重点实验室,吉林长春130022

出　　处：《液压与气动》2018年第1期78-83,共6页Chinese Hydraulics & Pneumatics

基　　金：吉林省重点科技攻关项目(20170204066GX)

摘　　要：以液力缓速器为研究对象,通过计算流体动力学(CFD)数值模拟方法,借助滑动网格技术对缓速器内部非稳态不可压缩流动进行数值计算。分析了不同叶片前倾角下缓速器内部流场的特性和制动转矩。在最优前倾角的基础上,基于各结构参数之间的相关性,分别研究了不同流道腔型、叶片数对液力缓速器性能的影响。当叶片倾角为40°,截面形状为扁圆形,转子外环叶片数为40,内环叶片数为20,定子叶片数为43时,模型制动转矩最大,制动效果最好。Taking a hydraulic retarder as the object of study,by means of the computational fluid dynamics(CFD)method,we calculate the unsteady incompressible flow in the retarder numerically with the help of sliding mesh technique.The characteristics of internal flow field and the braking torque with different blade rake angles are firstly analyzed,and the optimal vane angle is achieved.Then,based on the correlation of structural parameters,the influence of different flow passage types and blade numbers on the performance of hydraulic retarder is studied respectively and finally concluded.The results show that:when the blade angle is40degrees,the cross section shape is flat;when the rotor outer ring blade number is40,and the inner ring blade number is20,and the stator blade number is43,the largest braking torque can be obtained,and the braking effect is the best.

关 键 词：液力缓速器 数值模拟 结构参数 辅助制动 

分 类 号：TH137[机械工程—机械制造及自动化] S232.3[农业科学—农业机械化工程]