【作者】 刘春宝；

【导师】 马文星；

【作者基本信息】 吉林大学 ， 机械设计及理论， 2006， 硕士

【摘要】 本文结合国家自然基金“液力变矩器现代设计理论研究”、吉林大学创新基金“液力传动元件三维设计理论与方法研究”,以及杭州齿轮箱集团“液力变矩器系列化研究”等科研项目,首先对W305基型液力变矩器进行了研究,并设计了W305基型变矩器的7个叶栅系列方案。在此基础上,相似设计了W350液力变矩器的循环圆和7个叶栅系列方案。应用计算流体力学(CFD)软件对液力变矩器流场进行了数值计算。基于CFD计算结果,对液力变矩器的性能进行预测,最后对液力变矩器产品进行试验,验证数值计算及性能预测的准确性。全文主要内容如下:1.建立基于W305液力变矩器的变矩器系列化产品型谱;2.采用环量分配法,设计基型W305液力变矩器的7套叶栅系列;3.运用相似设计法,设计W350液力变矩器循环圆和7套叶栅系列;4.应用三维流动理论,利用CFD软件STAR-CD,对系列化液力变矩器的流场进行数值计算及分析;5.基于液力变矩器三维流场数值解,对变矩器的性能进行预测;6.在液力传动试验台上对液力变矩器进行性能试验,与理论计算结果进行对比分析。更多还原

【Abstract】 Hydrodynamic Torque Convert is one of the basic elements of theHydrodynamic transmission. It should be treated as a new power system, whileEngine and Hydrodynamic Torque Convert are matching. The new power systemhas new characteristics. If Engine and Hydrodynamic Torque Convert don’t matchwell, the demand of dynamic features and economical which Vehicle andConstruction Machinery & Equipment need couldn’t be fulfilled, even both of themhave nice performances. In order to avoid the bad matching and fulfil the demands,serial Hydrodynamic Torque Converts could be designed to match the existingengines, by doing that the productivity of vehicle and construction machinery &equipment should be increased.Combined the project ‘Research on the Modern Design Theory of HydrodynamicTorque Converter’ belonged to ‘national natural science fund’, the project ‘Researchon the modern design theory and method of the three-dimensional flow ofHydrodynamic Transmission’ belonged to the ‘Jilin University Creative Fund’ andthe project ‘Research on series design of Hydrodynamic Torque Convert’ whichwas funded by the HC Group, the follow tasks have been carried out in this paper.Firstly, the hydrodynamic torque converter W305 has been deeply researched. The7 blade systems of W305 are designed. Secondly, a new circulatory circle and 7blade systems of hydrodynamic torque converter W350 are designed based on theW305 by used the method of similar design. Thirdly, the internal flow ofhydrodynamic torque converter W305 and W350 is calculated used the programSTAR-CD which is popularly used in Computational Fluid Dynamics. Theperformances of the torque converter W305 and W350 are also estimated by thenumerical results. Finally, to validate the veracity of numerical analysis andperformance estimation, the hydrodynamic torque converters are tested. The data ofexperiment is analyzed and compared with the numerical results.There are six chapters in the dissertation.The first chapter firstly gives a general introduce about series hydrodynamictorque converters both domestic and foreign, the purpose and meaning of thedissertation are explained. Lastly, the research content of the dissertation is pointedout clearly.In second chapter, the type spectrum of hydrodynamic torque converter basedon the torque converter W305 is obtained by statistical data, principles, actuality ofHC Group, the kind of torque converters which are already in existence, and themarket. The 7 specifications of different maximal virtual diameters that include280,305,320,350,375,409 and 450mm are confirmed, each maximal virtualdiameter has another 6 specifications of different energy capacity, so it has 42 kindsof f torque converters in all, which will match the engine well, provide morechoices for the consumers.In third chapter, the 7 blade systems of W305 are designed. The blade profilesof torque converter are designed by the method of distributing the momentumequally and virtual models that are the base of numerical simulation are completedby program Unigraphics NX3 which is one of CAD softwares. A new circulatorycircle and 7 blade systems of hydrodynamic torque converter W350 are designedbased on the W305 by used the method of similar design. The virtual models ofW350 are obtained by the same ways like W305.In the forth chapter, the internal flow of hydrodynamic torque converter W305and W350 is calculated using the program STAR-CD which is popularly used inComputational Fluid Dynamics. The performances of the torque converter W305and W350 are also estimated by the numerical results.The numerical results are detailedly analyzed, the distribution rules of pressureand velocity in the internal flow of the impellers of torque converter are deeplyresearched, and the reasons for performance of internal flow are explained.Based on the numerical results, the torque of each impellers f torque converterW305 and W350 is calculated by the derive formulas for Euler Formula and theperformances of the torque converter are figured out.In the fifth chapter, the torque converter test rig is introduced in detail, thehydrodynamic torque converts W305 are tested on the test rig. the performances ofthem also obtained. The data of experiments was analyzed and compared with thenumerical results, and it is proved that the calculated results are agreement with theexperiment accurately.The sixth chapter is summarization of the whole dissertationBy compared the performances of tests and estimation, the error between themis less than 5%,so the conclusion of the dissertation is that the numericalcalculation of the internal flow and performance estimation are well and truly. Thedesign of torque converter can be guided by the numerical results in CFD.In conclusion, based on the numerical results and the performances of tests, theperformances of the series hydrodynamic torque convert W305 and W350 arefulfilled the demands of performance. The series design of hydrodynamic torqueconverts are successful.更多还原