基于弱耦合贝塞尔曲线的变矩器叶片反求参数化设计及优化研究  

Reverse Parameterization Design and Optimization of Torque Converter Blades Based on Weak Coupling Bezier Curves

作　　者：赵伟伟 王凯峰[1,2] 严思敏 全东 王忠山 马文星 ZHAO Wei-wei;WANG Kai-feng;YAN Si-min;QUAN Dong;WANG Zhong-shan;MA Wen-xing(Shaanxi Fast Gear Co.,Ltd.,Xi'an 710119,China;School of Transportation Science and Engineering,Beihang University,Beijing 100191,China;School of Mechanical and Aerospace Engineering,Jilin University,Changchun 130015,China)

机构地区：[1]陕西法士特齿轮有限责任公司,陕西西安710119 [2]北京航空航天大学交通科学与工程学院,北京100191 [3]吉林大学机械与航空航天工程学院,吉林长春130015

出　　处：《液压气动与密封》2024年第9期13-23,共11页Hydraulics Pneumatics & Seals

基　　金：陕西省“两链”融合企业(院所)联合重点项目(2022LL-JB-21);陕西省秦创原“科学家+工程师”队伍建设支撑项目(2022KXJ-029)。

摘　　要：针对某现有液力变矩器能容较小,不能满足大扭矩发动机匹配的问题,提出了一种基于弱耦合贝塞尔曲线的变矩器叶片反求参数化设计方法。通过非接触三维扫描的方式,对叶轮模型以及流道硅胶模型扫描并进行面片拟合处理,提取叶片吸力面及压力面和循环圆相交型线的点集矩阵,按照等弧长保型映射进行二维展开。然后采用两段三次贝塞尔曲线,通过切矢水平条件约束进行弱耦合,对逆向二维型线进行反求设计。基于反求参数化设计,通过调整导轮叶片骨线关键参数的方式对液力变矩器导轮进行优化设计。CFD仿真及试验表明,在变矩比基本不变、最高效率轻微下降的情况下,零速公称力矩由650.7 N·m提升到了773.2 N·m,提升幅度18.83%,满足了大扭矩发动机的匹配需求。此方法为液力变矩器的参数化反求设计及优化设计提供了一种新思路。A reverse parameterization design method for torque converter blades based on weak coupling bezier curves is proposed to address the issue of a certain existing hydraulic torque converter having a small energy capacity that cannot meet the matching requirements of high torque engines.By non-contact 3D scanning,the blade model and the silicone model of the flow channel are scanned and surface fitted to extract the point set matrix of the blade suction surface,pressure surface,and the intersection profile of the circulation circle.The two-dimensional expansion is carried out according to the contour preserving mapping of equal arc length.Then,two segments of cubic Bezier curves are used,and weak coupling is carried out through tangent horizontal constraints to reverse design the reverse two-dimensional profile.Based on reverse parameterization design,the stator is optimized by adjusting the key parameters of the stator blade bone line.CFD simulation and experiments show that,while the torque ratio remains basically unchanged and the maximum efficiency slightly decreases,the stall nominal torque has increased from 650.7 N·m to 773.2 N·m,with an increase of 18.83%.Satisfied the matching requirements of high torque engines.This method provides a new approach for parameterized reverse design and optimization design of hydraulic torque converters.

关 键 词：变矩器 叶片参数化设计 弱耦合 贝塞尔曲线 计算流体动力学 

分 类 号：TH137[机械工程—机械制造及自动化]