液力變矩器三維瞬態(tài)流場分析研究及改型設(shè)計
發(fā)布時間：2019-04-08 11:55
【摘要】：為了研究液力變矩器降耗技術(shù)，，本文對某型液力變矩器利用反求設(shè)計法進行幾何建模，并用利用CAD、CFD軟件進行其內(nèi)部全流道建模和三維瞬態(tài)流場模擬計算，對流場計算結(jié)果進行分析，找出影響其內(nèi)部能量損失的主要因素，在此基礎(chǔ)上對液力變矩器進行了改型設(shè)計，改型設(shè)計效果良好。 本文研究的主要內(nèi)容有： 1)介紹了液力變矩器的傳動原理、應(yīng)用范圍、理論研究現(xiàn)狀及各種特性。 2)分析了液力變矩器基本流動理論及設(shè)計方法，并利用反求設(shè)計法求得某型液力變矩器的幾何模型。 3)利用UG軟件抽取液力變矩器的三維全流道模型，并導(dǎo)入到專業(yè)的網(wǎng)格劃分軟件ICEMCFD進行網(wǎng)格劃分，得到了理想的網(wǎng)格模型。 4)對流道進行一些假設(shè)，采用滑動網(wǎng)格技術(shù)，在FLUENT中設(shè)置網(wǎng)格交互面及其它邊界條件，選擇合適的湍流模型以及求解器，設(shè)置收斂條件，調(diào)整松弛因子，進行了各個工況下的瞬態(tài)流場的數(shù)值計算。 5)據(jù)FLUENT計算結(jié)果，詳細分析了在三個典型工況下，各個工作輪流道的速度場和壓力場分布，并對其形成機理進行了分析。找出了影響泵輪、渦輪、導(dǎo)輪能量損失的主要因素，并提出了一些改進方案。 6)對液力變矩器進行整體分析并與試驗結(jié)果相對照，驗證了三維瞬態(tài)數(shù)值模擬的準確性。在此基礎(chǔ)上對泵輪葉片進行改型，結(jié)果表明改型設(shè)計效果良好。 7)全文總結(jié):本課題的研究突破了原有一元束流設(shè)計理論，采用三維全流道瞬態(tài)計算，更加符合液力變矩器內(nèi)部流動情況。此研究可以縮短設(shè)計研發(fā)周期、減少試驗次數(shù)、提高設(shè)計精度、改善產(chǎn)品的傳動效率，對現(xiàn)有產(chǎn)品的改型設(shè)計提供強有力的技術(shù)支撐。
[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.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH137.332
本文編號：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.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH137.332
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