發(fā)布時(shí)間：2018-03-27 14:10

  本文選題：裝載機(jī)　切入點(diǎn)：傳動(dòng)系統(tǒng)　出處：《東北大學(xué)》2012年碩士論文

【摘要】：裝載機(jī)動(dòng)力傳動(dòng)系統(tǒng)主要包括：發(fā)動(dòng)機(jī)、液力變矩器、變速箱和驅(qū)動(dòng)橋,是裝載機(jī)最重要的組成部分之一。動(dòng)力傳動(dòng)系統(tǒng)各參數(shù)的匹配是否合理,將最終決定整機(jī)的性能優(yōu)劣。因此,研究裝載機(jī)動(dòng)力傳動(dòng)系統(tǒng)參數(shù)合理匹配非常具有實(shí)際應(yīng)用價(jià)值。 以ZL50型輪式裝載機(jī)的液力機(jī)械傳動(dòng)系統(tǒng)為例進(jìn)行分析,針對(duì)樣機(jī)傳動(dòng)系統(tǒng)存在性能差,匹配效果不佳,進(jìn)行改進(jìn)。計(jì)算整機(jī)所需的發(fā)動(dòng)機(jī)功率,并確定發(fā)動(dòng)機(jī)型號(hào)以及工作裝置液壓系統(tǒng)的基本參數(shù)。 針對(duì)采用的6CT8.3-C215渦輪增壓發(fā)動(dòng)機(jī),提出恒功率區(qū)間的概念。在分析現(xiàn)行的發(fā)動(dòng)機(jī)與液力變矩器的匹配基礎(chǔ)上,提出面向渦輪增壓發(fā)動(dòng)機(jī)與變矩器匹配的新方法：即高效區(qū)中點(diǎn)匹配法。以部分功率匹配為例,與現(xiàn)行匹配方法進(jìn)行比較,結(jié)果表明液力變矩器平均輸出功率提高,發(fā)動(dòng)機(jī)比油耗值下降,因此高效區(qū)中點(diǎn)匹配法效果更好。以液力變矩器的有效直徑為設(shè)計(jì)變量,對(duì)發(fā)動(dòng)機(jī)與液力變矩器進(jìn)行優(yōu)化匹配,并計(jì)算變速箱各擋速比。 在完成上述工作的基礎(chǔ)上,采用模塊化的思想,將裝載機(jī)分為：發(fā)動(dòng)機(jī)、液力變矩器、變速箱和驅(qū)動(dòng)橋、整機(jī)以及外界環(huán)境五個(gè)模塊,并分別建立數(shù)學(xué)模型和MATLAB/Simulink仿真模型。將每個(gè)模塊的MATLAB/Simulink仿真模型連接起來,建立裝載機(jī)動(dòng)力傳動(dòng)系統(tǒng)仿真系統(tǒng),分析裝載機(jī)傳動(dòng)系統(tǒng)在鏟裝物料工況、前進(jìn)舉升工況和滿載后退工況下的工作性能,結(jié)果表明裝載機(jī)動(dòng)力性與經(jīng)濟(jì)性不能同時(shí)得到滿足,設(shè)計(jì)時(shí)應(yīng)有所側(cè)重。 上述工作為合理匹配裝載機(jī)動(dòng)力傳動(dòng)系統(tǒng)參數(shù)提供借鑒,建立的動(dòng)力傳動(dòng)系統(tǒng)仿真系統(tǒng)可在設(shè)計(jì)階段對(duì)傳動(dòng)系統(tǒng)的性能進(jìn)行進(jìn)行預(yù)測(cè),有效縮短設(shè)計(jì)時(shí)間。
[Abstract]:The powertrain system of loader mainly includes engine, hydraulic torque converter, gearbox and drive axle, which is one of the most important parts of loader. Therefore, it is of great practical value to study the reasonable matching of the parameters of the loader power transmission system. Taking the hydraulic mechanical transmission system of ZL50 wheel loader as an example, the performance of the prototype transmission system is poor, the matching effect is not good, and the engine power is calculated. The basic parameters of hydraulic system of engine type and working device are determined. The concept of constant power range is put forward for the 6CT8.3-C215 turbocharged engine. Based on the analysis of the matching between the engine and the torque converter, In this paper, a new matching method for turbocharged engine and torque converter is proposed, that is, the midpoint matching method in high efficiency region. Taking partial power matching as an example, compared with the current matching method, the results show that the average output power of hydraulic torque converter is increased. Because of the decrease of engine fuel consumption value, the midpoint matching method in high efficiency region is better. Taking the effective diameter of hydraulic torque converter as design variable, the engine and hydraulic torque converter are optimized and the gear ratio of gearbox is calculated. On the basis of the above work, the loader is divided into five modules: engine, hydraulic torque converter, gearbox and drive axle, whole machine and external environment. The mathematical model and MATLAB/Simulink simulation model are established respectively. The MATLAB/Simulink simulation model of each module is connected together, and the power transmission system simulation system of loader is established, and the working condition of loader transmission system in shovel loading material is analyzed. The results show that the power performance and economy of the loader can not be satisfied at the same time, so the design should be emphasized. The above work provides a reference for reasonably matching the parameters of powertrain system of loader. The simulation system of power transmission system established can predict the performance of transmission system in the design stage and effectively shorten the design time.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH243

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