基于变截面积流道的液力变矩器叶栅系统设计  

Cascade System Design of Torque Converter Based on Variable Sectional-Area

作　　者：柯志芳 刘城[1,3] 郭猛[1,4] 魏巍 闫清东[1,3] KE Zhifang;LIU Cheng;GUO Meng;WEI Wei;YAN Qingdong(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;Institute of Advanced Technology,Beijing Institute of Technology,Ji'nan,Shandong 250300,China;National Key Laboratory of Vehicular Transmission,Beijing Institute of Technology,Beijing 100081,China;Yangtze River Delta Research Institute,Beijing Institute of Technology,Jiaxing,Zhejiang 314019,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]北京理工大学济南前沿技术研究院,山东济南250300 [3]北京理工大学车辆传动重点实验室,北京100081 [4]北京理工大学长三角研究院,浙江嘉兴314019

出　　处：《北京理工大学学报》2024年第5期512-520,共9页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(51475041,51805027);国家部委基础产品创新计划资助项目(237099000000170009);车辆传动重点实验室基金资助项目(614221304040517)。

摘　　要：流道截流面积分布对液力旋转机械的液力性能具有重要影响.为了减少扩散等液力损失,变矩器流道截面积分布通常采用等截面积分布的形式,但并未充分发挥截面积分布参数在流场调节和性能优化方面的优势.因此,文中研究提出了过流截面积表征模型,并建立了基于可变截面积分布的变矩器循环圆及叶栅设计系统,对变截面积流道的液力变矩器循环圆设计方法进行了研究.通过设计多组不同截面积分布的实例,采用DOE方法进行比较分析,进一步研究了叶轮截面积分布形式对变矩器性能的影响.同时,通过对不同叶轮的组合设计,获得了组合型性能优化的循环圆设计结果.实验结果表明,基于变截面积流道优化设计的变矩器泵轮转矩提升了18.5%,起动变矩比也提高了3.9%.说明基于变截面积分布的液力变矩器循环圆设计方法是一种有效的优化设计方法,能够在保持外形尺寸的同时提升变矩器性能.The sectional-area distribution significantly influences the hydraulic performance of hydrodynamic turbo-machinery,particularly the torque converters.Conventional torque converter designs often adopt an equalsectional-area-distribution approach to minimize hydraulic losses,neglecting the full potential of sectional-area distribution parameters for performance optimization.To address this,a novel modeling method and a corresponding torus design approach were proposed to accurately describe and utilize sectional-area distribution in this paper.Firstly,a comprehensive cascade design system was developed based on variable sectional-area distribution for torque converters to complete the examinations in-depth of their unique characteristics and performance implications.Then,a design of experiments(DOE)method was used and multiple cases with different sectionalarea distributions were designed and evaluated to assess the influence of sectional-area distributions on hydrodynamic performance.And then,exploring optimal sectional-area distribution designs of various impellers,an integrated optimization design result was achieved for the enhanced optimized torus design.Finally,the substantial improvements were demonstrated by experimental results,achieving a remarkable 18.5%increase in pump torque and a significant 3.9%enhancement in torque ratio.The results affirm the effectiveness of the proposed approach in enhancing torque converter performance without altering overall dimensions,highlighting the im-portance of considering variable sectional-area distribution in torque converter design.

关 键 词：流体力学 液力变矩器 截面积分布 实验设计(DOE) 叶栅系统 

分 类 号：TH137.332[机械工程—机械制造及自动化]