本文選題：工程車輛 + 差動行星輪系��； 參考：《太原理工大學(xué)》2017年碩士論文

【摘要】：拖拉機、起重機、裝載機以及重型運輸車等被廣泛應(yīng)用于工程領(lǐng)域中的車輛,是建筑工程的主干力量,在工程建設(shè)和經(jīng)濟社會發(fā)展中具有舉足輕重的作用,然而在全球能源和環(huán)境問題日趨嚴峻,燃料電池汽車和純電動汽車續(xù)航能力有限,不適用于工程車輛上的情況下,機液復(fù)合動力車輛的出現(xiàn)為目前正處于困境中的人們提供了一個解決問題的新思路。傳動系統(tǒng)是決定機液復(fù)合形式車輛經(jīng)濟性能和動力性能的最關(guān)鍵部分之一,而變速器又影響著車輛動力傳動系統(tǒng)的性能,是車輛傳動系統(tǒng)的核心部分。本文提出了一種基于差動輪系的機液復(fù)合型雙動力無級變速器,它將是差動輪系機構(gòu)的一種特殊應(yīng)用方式,其承載能力特別強、工作效率高以及無級調(diào)速范圍廣的優(yōu)點使其特別適合在工程車輛上使用。本無級變速器的使用可以使車輛的動力性和經(jīng)濟性得到極大提高。論文簡述了無級變速器的分類以及每一類無級變速器的優(yōu)缺點和國內(nèi)外的研究現(xiàn)狀,闡明了在工程車輛上采用這種機液復(fù)合無級變速器具有很大的價值和意義。此外,本文還對機液復(fù)合無級變速傳動系統(tǒng)的特性、原理以及各種傳動方案的特點進行了分析和比較,為機液復(fù)合無級變速系統(tǒng)的設(shè)計和在工程車輛上的應(yīng)用提供了理論支持。以上述理論分析為基礎(chǔ),借助SOLIDERWORKS軟件平臺,建立了無級變速器行星輪系機構(gòu)的三維模型,并借助ADAMS軟件平臺對其進行了仿真分析;而后又針對無級變速器行星輪系部分,進行了可靠性建模,分析了對可靠性具有重大影響的因素,并以東方紅拖拉機為載體,完成了機液復(fù)合無級變速器動力參數(shù)的匹配。在此基礎(chǔ)上,又運用遺傳算法對無級變速器的參數(shù)進行了優(yōu)化設(shè)計。最后還對無級變速器和整車系統(tǒng)進行了建模,并借助SIMULINK軟件對發(fā)動機效率和轉(zhuǎn)速、車速、變量泵控制斜盤擺角以及無級變速的效率進行了仿真研究。仿真結(jié)果表明:本無級變速器承載能力強、傳動效率比較高、動力性和經(jīng)濟性較好,能很好的應(yīng)用于工程車輛上。通過本論文的分析能夠得出如下結(jié)論,首先,本文所述的機液復(fù)合無級變速器比傳統(tǒng)的無級變速器具有更好的動力性和經(jīng)濟性;其次,參數(shù)優(yōu)化設(shè)計可以明顯降低本無級變速器的重量并提高其可靠性,使其特性更加突出;最后,通過對動力參數(shù)的合理匹配,并結(jié)合本機液復(fù)合無級變速器的使用,在滿足工程車輛動力性的前提下,的確能夠讓發(fā)動機和無級變速器保持較高的工作效率,實現(xiàn)節(jié)能環(huán)保的目的。
[Abstract]:Tractors, cranes, loaders and heavy-duty transport vehicles are widely used in the field of engineering. They are the backbone of construction projects and play an important role in engineering construction and economic and social development.However, when the global energy and environmental problems are becoming increasingly serious, fuel cell vehicles and pure electric vehicles have limited ability to live, which is not suitable for engineering vehicles.The emergence of mechanical-hydraulic compound power vehicle provides a new way to solve the problem for people who are in difficult position at present.The transmission system is one of the most important parts that determine the economic and dynamic performance of the vehicle in the combination of mechanical and hydraulic system, and the transmission affects the performance of the vehicle power transmission system and is the core part of the vehicle transmission system.In this paper, a kind of mechanical-hydraulic compound double-power stepless transmission based on differential gear train is proposed. It will be a special application mode of differential gear train mechanism, and its bearing capacity is especially strong.The advantages of high efficiency and wide range of stepless speed regulation make it especially suitable for engineering vehicles.The use of the CVT can greatly improve the power and economy of the vehicle.In this paper, the classification of CVT, the advantages and disadvantages of each kind of CVT and the research status at home and abroad are briefly introduced, and the great value and significance of using this kind of CVT in engineering vehicles are expounded.In addition, this paper also analyzes and compares the characteristics, principles and various transmission schemes of the mechanical-hydraulic compound stepless transmission system, which provides theoretical support for the design of the mechanical-hydraulic compound stepless transmission system and its application in engineering vehicles.Based on the above theoretical analysis and with the help of SOLIDERWORKS software platform, the three-dimensional model of the planetary gear train mechanism of the stepless transmission is established, and the simulation analysis is carried out with the help of the ADAMS software platform, and then the planetary gear train part of the stepless transmission is analyzed.The reliability modeling is carried out and the factors which have great influence on the reliability are analyzed. The matching of the dynamic parameters of the hydraulic composite CVT is completed with Dongfanghong tractor as the carrier.On this basis, genetic algorithm is used to optimize the parameters of CVT.Finally, the stepless transmission and the whole vehicle system are modeled, and the efficiency of engine efficiency and speed, speed, swing angle controlled by variable pump and stepless speed are simulated by SIMULINK software.The simulation results show that the stepless transmission has strong bearing capacity, high transmission efficiency, good power and economy, and can be applied to engineering vehicles.Through the analysis of this paper, the following conclusions can be drawn: firstly, the mechanical-hydraulic compound stepless transmission has better power performance and economy than the traditional CVT.Parameter optimization design can obviously reduce the weight of the CVT and improve its reliability, and make its characteristics more prominent. Finally, through the reasonable matching of the dynamic parameters and the use of the hydraulic compound CVT,On the premise of satisfying the dynamic performance of engineering vehicles, the engine and CVT can be kept high working efficiency and the purpose of energy saving and environmental protection can be realized.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH132.46

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