本文選題：無級(jí)變速 + 傳動(dòng)控制�。� 參考：《吉林大學(xué)》2016年碩士論文

【摘要】：無級(jí)變速器(CVT)是一種技術(shù)先進(jìn)的變速器產(chǎn)品,與傳統(tǒng)變速器相比其結(jié)構(gòu)簡(jiǎn)單、成本低、能夠充分發(fā)揮發(fā)動(dòng)機(jī)的動(dòng)力特性,實(shí)現(xiàn)動(dòng)力傳動(dòng)系統(tǒng)的綜合控制。從變速的平穩(wěn)性以及良好的燃油經(jīng)濟(jì)性這兩項(xiàng)優(yōu)勢(shì)來看,無級(jí)變速器(CVT)的市場(chǎng)前景十分廣闊。目前,無級(jí)變速器大多采用液壓控制系統(tǒng)對(duì)錐盤加壓實(shí)現(xiàn)變速傳動(dòng)控制,本文依托企業(yè)委托技術(shù)開發(fā)實(shí)際項(xiàng)目,提出一種機(jī)械式傳功控制機(jī)構(gòu)。該機(jī)構(gòu)通過螺旋機(jī)構(gòu)對(duì)錐盤進(jìn)行加壓,利用伺服電機(jī)進(jìn)行調(diào)速,與傳統(tǒng)液壓控制機(jī)構(gòu)相比,能顯著降低汽車油耗,提高變速系統(tǒng)的傳動(dòng)效率。本文通過對(duì)比分析不同傳動(dòng)形式的變速器,結(jié)合機(jī)械式CVT傳動(dòng)控制機(jī)構(gòu)的國(guó)內(nèi)外研究現(xiàn)狀,詳細(xì)闡述了鏈?zhǔn)紺VT變速傳動(dòng)系統(tǒng)的主要組成部件與變速原理,針對(duì)鏈?zhǔn)紺VT的變速系統(tǒng)力學(xué)模型,對(duì)變速系統(tǒng)的鏈條張力以及錐盤夾緊力受力模型進(jìn)行了研究和分析。從無級(jí)變速傳動(dòng)系統(tǒng)的設(shè)計(jì)要求和機(jī)電一體化控制的原理出發(fā),提出了行星輪系與微調(diào)螺旋機(jī)構(gòu)聯(lián)合控制的傳動(dòng)控制方案。根據(jù)變速傳動(dòng)控制機(jī)構(gòu)的設(shè)計(jì)要求對(duì)機(jī)械式變速傳動(dòng)控制機(jī)構(gòu)進(jìn)行了系統(tǒng)性的設(shè)計(jì),同時(shí)針對(duì)行星輪系中的齒輪進(jìn)行了參數(shù)化設(shè)計(jì)。利用ADAMS動(dòng)力學(xué)分析軟件,建立了變速傳動(dòng)控制機(jī)構(gòu)在三種典型傳動(dòng)比工況下的動(dòng)力學(xué)仿真模型,研究了不同傳動(dòng)比工況下變速系統(tǒng)的動(dòng)力學(xué)特性,計(jì)算了變速系統(tǒng)的傳動(dòng)比誤差,分析了系統(tǒng)的傳遞效率。根據(jù)變速系統(tǒng)鏈節(jié)之間的張力、銷軸與錐盤之間的接觸力,分析了變速系統(tǒng)的受力情況。根據(jù)標(biāo)記鏈節(jié)在特定平面內(nèi)的運(yùn)行軌跡,分析了變速傳動(dòng)過程中鏈條系統(tǒng)的波動(dòng)情況。利用ANASYS對(duì)傳動(dòng)控制機(jī)構(gòu)中行星輪系進(jìn)行了靜力學(xué)特性分析計(jì)算,對(duì)行星輪系中的太陽輪與行星齒輪之間的嚙合特性進(jìn)行了研究,根據(jù)中心輪與行星輪在靜載荷作用下的應(yīng)力和應(yīng)變?cè)茍D分析了應(yīng)力應(yīng)變情況,計(jì)算結(jié)果表明所設(shè)計(jì)行星輪系機(jī)構(gòu)滿足其強(qiáng)度與剛度設(shè)計(jì)要求。本文研究成果為CVT傳動(dòng)控制系統(tǒng)的設(shè)計(jì)與分析奠定了重要的理論基礎(chǔ),對(duì)加快我國(guó)無級(jí)變速器研發(fā)技術(shù)的自主化與產(chǎn)業(yè)化進(jìn)程以及提升我國(guó)汽車產(chǎn)品的自主創(chuàng)新能力具有重要的工程指導(dǎo)意義。
[Abstract]:CVT is a kind of technologically advanced transmission product. Compared with traditional transmission, CVT has a simple structure and low cost. It can give full play to the power characteristics of the engine and realize the comprehensive control of the power transmission system. From the point of view of the smoothness of speed change and good fuel economy, the market prospect of CVT (CVT) is very broad. At present, the stepless transmission mostly uses hydraulic control system to realize the variable speed drive control on the conical disc. This paper puts forward a kind of mechanical power transmission control mechanism based on the enterprise entrusting technology to develop the actual project. Compared with the traditional hydraulic control mechanism, this mechanism can significantly reduce the fuel consumption of the automobile and improve the transmission efficiency of the variable speed system. In this paper, the main components and principle of chain CVT transmission system are described in detail by comparing and analyzing the transmission with different transmission forms and combining with the domestic and international research status of mechanical CVT transmission control mechanism. Based on the mechanical model of variable speed system of chain CVT, the model of chain tension and clamping force of tapered disk is studied and analyzed. Based on the design requirements of stepless variable speed transmission system and the principle of electromechanical integrated control, the drive control scheme of planetary gear train and fine adjusting screw mechanism is put forward. According to the design requirements of the variable speed transmission control mechanism, the mechanical transmission control mechanism is systematically designed, and the parameterized design of the gear in the planetary gear train is carried out at the same time. Using Adams dynamic analysis software, the dynamic simulation model of the variable speed transmission control mechanism under three typical transmission ratio conditions is established, and the dynamic characteristics of the variable speed system under different transmission ratio conditions are studied. The transmission ratio error of the variable speed system is calculated and the transmission efficiency of the system is analyzed. According to the tension between the chain joints and the contact force between the pin shaft and the cone disc, the force of the variable speed system is analyzed. The fluctuation of chain system in the process of variable speed transmission is analyzed according to the running track of the marked link in a particular plane. The static characteristics of planetary gear train in transmission control mechanism are analyzed and calculated by ANASYS, and the meshing characteristics between solar gear and planetary gear in planetary gear train are studied. According to the stress and strain cloud diagram of the center gear and the planetary wheel under static load, the stress and strain conditions are analyzed. The calculated results show that the designed planetary gear train meets the design requirements of strength and stiffness. The research results in this paper have laid an important theoretical foundation for the design and analysis of CVT transmission control system. It is of great significance to accelerate the independent development and industrialization of stepless transmission technology in China and to enhance the independent innovation ability of automobile products in China.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U463.2

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