卸荷孔分布形式对液力变矩器轴向载荷影响规律分析
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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.
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.
引文
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[2] 黄建勋,吴光强,王立军.液力变矩器轴向力计算与优化[J].佳木斯大学学报(自然科学版),2012,30(1):6-9. Huang Jianxun,Wu Guangqiang, Wang Lijun.Analysis and optimization of axial force in torque converter[J].Journal of Jiamusi University(Natural Science Edition),2012,30(1):6-9.(in Chinese)
[3] 闫清东,李晋,魏巍.工作油液温度对液力变矩器性能影响计算流体力学分析及试验研究[J].机械工程学报,2014,50(12):118-125. Yan Qingdong,Li Jin,Wei Wei,et al.Research on effect of working oil temperature for hydraulic torque converter performance using CFD and test[J].Journal of Mechanical Engineering,2014,50(12):118-125.(in Chinese)
[4] 才委,马文星,褚亚旭,等.液力变矩器导轮流场数值模拟与试验[J].农业机械学报,2007,38(8):11-14. Cai Wei,Ma Wenxing,Chu Yaxu, et al.Numerical simulation and experimental research on flow field in the stator of a torque converter[J].Transactions of the Chinese Society for Agricultural Machinery,2007,38(8):11-14.(in Chinese)
[5] 许涛,过学迅,张杰山,等.基于 Fluent 的液力变矩器内流场数值计算[J].农业机械学报,2007,38(12):152-155,168. Xu Tao,Guo Xuexun,Zhang Jieshan,et al.Numerical calculation of the internal flow field of torque converter based on fluent[J].Transactions of the Chinese Society for Agricultural Machinery,2007,38(12):152-155,168.(in Chinese)
[6] 刘城,潘鑫,闫清东,等.基于DOE及RSM的液力变矩器叶片数对性能的影响及优化[J].北京理工大学学报,2012,32(7):33-37. Liu Cheng,Pan Xin,Yan Qingdong,et al.Effect of blade number on performance of torque converter and its optimization based on DOE and response surface methodology [J].Transactions of Beijing Institute of Technology,2012,32(7):33-37.(in Chinese)