卸荷孔分布形式对液力变矩器轴向载荷影响规律分析  

Thrust Load with Different Balance Holes Pattern of Turbine Hub in a Hydrodynamic Torque Converter

作　　者：闫清东[1,2] 谭路 魏巍 宋泽民[1] YAN Qing-dong;TAN Lu;WEI Wei;SONG Ze-min(National Key Lab of Vehicular Transmission,Beijing Institute of Technology,Beijing 100081,China;Collaborative Innovation Center of Electric Vehicles in Beijing,Beijing 100081;FAW-Volkswagen Automotive Co.,Ltd.,Chengdu Branch,Chengdu,Sichuan 610199,China)

机构地区：[1]北京理工大学车辆传动国家重点实验室,北京100081 [2]北京电动车辆协同创新中心,北京100081 [3]一汽-大众汽车有限公司成都分公司,四川成都610199

出　　处：《北京理工大学学报》2019年第1期7-13,共7页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金青年科学基金资助项目(51475041;51805027);国家部委基础产品创新科研基金资助项目(VTDP-2104;237099000000170009);车辆传动国家重点实验室基金资助项目(614221304040517)

摘　　要：为研究卸荷孔分布形式对叶轮轴向载荷的影响规律,建立不同卸荷孔分布圆半径、卸荷孔数与卸荷孔径参数配置下的某铸造型液力变矩器轴向力计算模型,利用DOE正交试验算法与单因素试验分析,研究各参数对液力变矩器轴向力的影响规律.结果表明:在牵引工况,分布圆半径越大,泵轮、涡轮的轴向载荷越小,而卸荷孔径、卸荷孔数的变化对于轴向力的影响不显著.这三个因素中卸荷孔分布圆半径对轴向力的影响最大,其次为卸荷孔数,最后是卸荷孔径.算例中的最佳方案比一般方案减荷效果提升5%～8%.因此在不影响工作性能要求及工作轮结构强度的前提下,应尽量增大卸荷孔分布圆半径,并根据变矩器使用工况需求,合理设置卸荷孔数与孔径,以改善轴承受载情况.The balance holes pattern perforated in the turbine hub can effectively reduce the thrust load of the torque converter and increase its service life.In order to study the influence of balance holes with different design parameters on the thrust force,different parameter models for calculating the thrust force of the torque converter under different balance hole distribution radius,hole number and hole diameter were established.Based on DOE orthogonal test algorithm and single factor test analysis,the influence of various balance hole on the thrust force of the torque converter was studied.The results show that the thrust load of pump and turbine drops with larger distribution radius.The change of the hole number and the hole diameter has no significant effect on the thrust force.Among these three factors,the hole distribution radius has the greatest influence on the thrust force,followed by the hole number and finally the hole diameter.The optimal pattern in the case studied is 5%to 8%better than the original one.Therefore,on the premise of no affecting performance requirements and structural strength,the radius of the balance hole distribution should be enlarged as much as possible.According to the operating condition requirements of the torque converter,the number and the diameter of balance hole should be set reasonably to protect the bearing.

关 键 词：液力变矩器 卸荷孔 轴向力 计算流体力学 

分 类 号：TH137.332[机械工程—机械制造及自动化]