【摘要】：非道路用工程機(jī)械的高耗能低效率與當(dāng)今世界的主題之一綠色環(huán)保相違背,本論文以筑路工程機(jī)械主力軍之一的自行式平地機(jī)為研究對(duì)象,首先介紹了國(guó)內(nèi)外平地機(jī)的發(fā)展現(xiàn)狀,簡(jiǎn)單介紹了平地機(jī)的組成部分,各系統(tǒng)的功能,應(yīng)用工況以及闡述了國(guó)內(nèi)外平地機(jī)降低功率損耗的方法和研究現(xiàn)狀。使用仿真分析軟件找出了主要功率損失的來(lái)源,并對(duì)各來(lái)源進(jìn)行了相應(yīng)的分析,提出了優(yōu)化方案,提高了整機(jī)的功率使用效率,減少了發(fā)動(dòng)機(jī)功率的損耗,同時(shí)降低了燃油消耗率,使得平地機(jī)的功率得到了最大化的利用。首先,簡(jiǎn)單介紹了平地機(jī)的主要結(jié)構(gòu)以及主要應(yīng)用工況,分析了國(guó)內(nèi)外平地機(jī)降低功率損耗的方法以及研究現(xiàn)狀。其次,對(duì)自行式平地機(jī)功率傳遞的路徑進(jìn)行了分析,通過(guò)Dynasty仿真軟件找出對(duì)平地機(jī)功率損耗影響最大的傳動(dòng)系統(tǒng)與液壓系統(tǒng)進(jìn)行了進(jìn)一步的分析。接著,一是通過(guò)自行式平地機(jī)傳統(tǒng)的液力變矩器傳動(dòng)優(yōu)缺點(diǎn)的分析,介紹了帶閉鎖離合器的變速箱工作原理,并分析了帶有該功能的液力機(jī)械傳動(dòng)系統(tǒng)功耗降低的原理以及相對(duì)于變矩器傳動(dòng)來(lái)說(shuō)效率的提高；二是通過(guò)對(duì)平地機(jī)液壓系統(tǒng)定量系統(tǒng)和變量系統(tǒng)的分析,建立數(shù)學(xué)模型,并計(jì)算了典型工況液壓系統(tǒng)功率損耗對(duì)比。最后,為了驗(yàn)證系統(tǒng)的有效性和仿真模型的準(zhǔn)確性,對(duì)裝有閉鎖離合器變速箱和變量液壓系統(tǒng)的平地機(jī)進(jìn)行了試驗(yàn)驗(yàn)證,通過(guò)試驗(yàn)結(jié)果和仿真分析結(jié)果的對(duì)比,得出這兩種降低功率損耗的方案可行性,功率損耗在不同的應(yīng)用工況下均有著明顯的降低。
[Abstract]:The high energy consumption and low efficiency of non-road construction machinery is contrary to the green environmental protection, one of the themes of the world today. In this paper, the self-propelled leveling machine, which is one of the main force of road construction machinery, is taken as the research object. Firstly, this paper introduces the development of leveling machines at home and abroad, briefly introduces the components of the grader, the functions of each system, the application conditions, and expounds the methods and research status of reducing the power loss of the leveling machines at home and abroad. The source of main power loss is found out by using the simulation analysis software, and the corresponding analysis of each source is carried out, and the optimized scheme is put forward, which improves the power efficiency of the whole machine and reduces the power loss of the engine. At the same time, the fuel consumption rate is reduced and the power of the grader is maximized. Firstly, the main structure and main application conditions of the grader are introduced, and the methods to reduce the power loss and the research status at home and abroad are analyzed. Secondly, the path of power transfer of self-propelled grader is analyzed, and the transmission system and hydraulic system which have the greatest influence on the power loss of the grader are found out by Dynasty simulation software. Then, through the analysis of the advantages and disadvantages of the traditional hydraulic torque converter drive of the self-propelled grader, the working principle of the gearbox with locking clutch is introduced. The principle of reducing power consumption of hydraulic mechanical transmission system with this function and the improvement of efficiency compared with torque converter transmission are analyzed. Second, the mathematical model is established by analyzing the quantitative system and variable system of hydraulic system of leveling machine. The power loss of hydraulic system under typical working conditions is compared. Finally, in order to verify the validity of the system and the accuracy of the simulation model, the flatbed with latch clutch gearbox and variable hydraulic system is tested and verified. The feasibility of these two schemes to reduce the power loss is obtained, and the power loss is obviously reduced under different application conditions.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U415.516

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本文編號(hào)：2134960