液力变矩器三维瞬态流场分析研究及改型设计
发布时间：2019-04-08 11:55
【摘要】：为了研究液力变矩器降耗技术，，本文对某型液力变矩器利用反求设计法进行几何建模，并用利用CAD、CFD软件进行其内部全流道建模和三维瞬态流场模拟计算，对流场计算结果进行分析，找出影响其内部能量损失的主要因素，在此基础上对液力变矩器进行了改型设计，改型设计效果良好。 本文研究的主要内容有： 1)介绍了液力变矩器的传动原理、应用范围、理论研究现状及各种特性。 2)分析了液力变矩器基本流动理论及设计方法，并利用反求设计法求得某型液力变矩器的几何模型。 3)利用UG软件抽取液力变矩器的三维全流道模型，并导入到专业的网格划分软件ICEMCFD进行网格划分，得到了理想的网格模型。 4)对流道进行一些假设，采用滑动网格技术，在FLUENT中设置网格交互面及其它边界条件，选择合适的湍流模型以及求解器，设置收敛条件，调整松弛因子，进行了各个工况下的瞬态流场的数值计算。 5)据FLUENT计算结果，详细分析了在三个典型工况下，各个工作轮流道的速度场和压力场分布，并对其形成机理进行了分析。找出了影响泵轮、涡轮、导轮能量损失的主要因素，并提出了一些改进方案。 6)对液力变矩器进行整体分析并与试验结果相对照，验证了三维瞬态数值模拟的准确性。在此基础上对泵轮叶片进行改型，结果表明改型设计效果良好。 7)全文总结:本课题的研究突破了原有一元束流设计理论，采用三维全流道瞬态计算，更加符合液力变矩器内部流动情况。此研究可以缩短设计研发周期、减少试验次数、提高设计精度、改善产品的传动效率，对现有产品的改型设计提供强有力的技术支撑。
[Abstract]:In order to study the consumption reduction technology of hydraulic torque converter, the geometric modeling of a hydraulic torque converter is carried out by using reverse design method, and the internal full channel modeling and three-dimensional transient flow field simulation are carried out by using CAD,CFD software. The calculation results of the flow field are analyzed and the main factors affecting the internal energy loss are found. On this basis, the modified design of the torque converter is carried out and the effect of the modified design is good. The main contents of this paper are as follows: 1) the transmission principle, application scope, theoretical research status and various characteristics of hydraulic torque converter are introduced. 2) the basic flow theory and design method of torque converter are analyzed, and the geometric model of a hydraulic torque converter is obtained by reverse design method. 3) the three-dimensional full channel model of torque converter is extracted by UG software and imported into ICEMCFD, which is a professional software, for mesh generation, and the ideal mesh model is obtained. 4) some assumptions are made on the flow channel. The sliding mesh technology is used to set the mesh interaction surface and other boundary conditions in the FLUENT, select the appropriate turbulence model and solver, set the convergence conditions, and adjust the relaxation factor. The numerical calculation of transient flow field under various working conditions is carried out. 5) according to the results of FLUENT calculation, the velocity field and pressure field distribution of each working channel under three typical working conditions are analyzed in detail, and the formation mechanism of the velocity field and pressure field are analyzed. The main factors affecting the energy loss of pump wheel, turbine and guide wheel are found out, and some improvement schemes are put forward. 6) the accuracy of the three-dimensional transient numerical simulation is verified by the overall analysis of the torque converter and the comparison with the experimental results. On this basis, the pump vane is modified, the results show that the design effect is good. 7) full text summary: the research of this subject breaks through the original theory of one-dimensional beam design, and adopts the transient calculation of three-dimensional full channel, which is more consistent with the internal flow of the torque converter. This research can shorten the design and development cycle, reduce the number of tests, improve the design accuracy, improve the transmission efficiency of the products, and provide strong technical support for the modification design of the existing products.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.332
本文编号：2454551
[Abstract]:In order to study the consumption reduction technology of hydraulic torque converter, the geometric modeling of a hydraulic torque converter is carried out by using reverse design method, and the internal full channel modeling and three-dimensional transient flow field simulation are carried out by using CAD,CFD software. The calculation results of the flow field are analyzed and the main factors affecting the internal energy loss are found. On this basis, the modified design of the torque converter is carried out and the effect of the modified design is good. The main contents of this paper are as follows: 1) the transmission principle, application scope, theoretical research status and various characteristics of hydraulic torque converter are introduced. 2) the basic flow theory and design method of torque converter are analyzed, and the geometric model of a hydraulic torque converter is obtained by reverse design method. 3) the three-dimensional full channel model of torque converter is extracted by UG software and imported into ICEMCFD, which is a professional software, for mesh generation, and the ideal mesh model is obtained. 4) some assumptions are made on the flow channel. The sliding mesh technology is used to set the mesh interaction surface and other boundary conditions in the FLUENT, select the appropriate turbulence model and solver, set the convergence conditions, and adjust the relaxation factor. The numerical calculation of transient flow field under various working conditions is carried out. 5) according to the results of FLUENT calculation, the velocity field and pressure field distribution of each working channel under three typical working conditions are analyzed in detail, and the formation mechanism of the velocity field and pressure field are analyzed. The main factors affecting the energy loss of pump wheel, turbine and guide wheel are found out, and some improvement schemes are put forward. 6) the accuracy of the three-dimensional transient numerical simulation is verified by the overall analysis of the torque converter and the comparison with the experimental results. On this basis, the pump vane is modified, the results show that the design effect is good. 7) full text summary: the research of this subject breaks through the original theory of one-dimensional beam design, and adopts the transient calculation of three-dimensional full channel, which is more consistent with the internal flow of the torque converter. This research can shorten the design and development cycle, reduce the number of tests, improve the design accuracy, improve the transmission efficiency of the products, and provide strong technical support for the modification design of the existing products.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.332
【参考文献】
相关期刊论文 前10条
1 朱经昌,阎清东;液力变矩器循环圆的计算机辅助设计[J];工程机械;1989年11期
2 刘冀察;液力变矩器叶栅系统设计的CAD方法[J];工程机械;1992年11期
3 李有义,董泳,张辉,陆肇达,董立春,王瑞明,刘春潮;液力变矩器叶栅系统测量方法[J];工程机械;1999年07期
4 王刚,赵万生,狄士春;扭曲叶片CAD造型方法的研究[J];哈尔滨工业大学学报;1999年05期
5 李有义,梁耀明,董泳,阎国军;液力变矩器叶栅绘形的三维模型设计方法[J];哈尔滨工业大学学报;2002年03期
6 雷雨龙;葛安林;田华;盛培德;;基于内流场分析的液力变矩器改型设计[J];机械工程学报;2006年02期
7 刘春宝;马文星;朱喜林;;液力变矩器三维瞬态流场计算[J];机械工程学报;2010年14期
8 马文星;;液力变矩器三维流动计算——流线曲率法[J];建筑机械;1991年01期
9 田华,葛安林,马文星;液力变矩器的内流场数值分析[J];农业机械学报;2005年04期
10 罗邦杰,马文星;液力变矩器设计计算方法的现状及其发展的预测[J];汽车工程;1989年04期
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