本文關(guān)鍵詞：滑移裝載機(jī)工作裝置液壓系統(tǒng)仿真與優(yōu)化設(shè)計(jì)　出處：《吉林大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 滑移裝載機(jī) 工作裝置 液壓系統(tǒng) AMESim 調(diào)平

【摘要】：近年來(lái)，我國(guó)的基礎(chǔ)建設(shè)已漸趨完善，逐步進(jìn)入了保養(yǎng)、維護(hù)階段。鑒于城市交通網(wǎng)絡(luò)密集、施工情況復(fù)雜，傳統(tǒng)的大型工程機(jī)械已經(jīng)逐步不適應(yīng)現(xiàn)代化建設(shè)的需要，因此小型工程機(jī)械擁有了良好的發(fā)展前景。而滑移裝載機(jī)作為小型工程機(jī)械的典型代表，可以配置多種屬具，在公路養(yǎng)護(hù)、城市綠化及道路除雪等方面，均具有巨大優(yōu)勢(shì)。 相比于國(guó)外滑移裝載機(jī)來(lái)說(shuō)，我國(guó)滑移裝載機(jī)技術(shù)相對(duì)落后，但是像徐工、柳工、廈工等國(guó)內(nèi)較大的工程機(jī)械廠家，均在該技術(shù)領(lǐng)域投入了大量的資源，為我國(guó)滑移裝載機(jī)技術(shù)的發(fā)展提供了巨大的動(dòng)力。本文基于校企合作項(xiàng)目“滑移裝載機(jī)底盤(pán)機(jī)構(gòu)性能研究”，對(duì)滑移裝載機(jī)工作裝置液壓系統(tǒng)的動(dòng)態(tài)性能展開(kāi)研究，并通過(guò)聯(lián)合仿真解決了實(shí)驗(yàn)過(guò)程中發(fā)現(xiàn)的問(wèn)題。 本文在理論分析的基礎(chǔ)上，結(jié)合仿真與實(shí)驗(yàn)，對(duì)國(guó)內(nèi)某廠家某型號(hào)的滑移裝載機(jī)展開(kāi)研究，具體研究?jī)?nèi)容如下： 首先，分析了國(guó)內(nèi)外滑移裝載機(jī)的發(fā)展現(xiàn)狀及技術(shù)現(xiàn)狀，并對(duì)工作裝置液壓系統(tǒng)及動(dòng)臂結(jié)構(gòu)采用的技術(shù)手段進(jìn)行簡(jiǎn)要闡述。介紹了國(guó)內(nèi)外仿真技術(shù)的發(fā)展現(xiàn)狀，進(jìn)而說(shuō)明本文在研究滑移裝載機(jī)工作系統(tǒng)中所采用的技術(shù)手段。 其次，分析了工作系統(tǒng)主要液壓元件工作原理，介紹了功率鍵合圖建模特點(diǎn)，并運(yùn)用功率鍵合圖建立了相關(guān)元件的數(shù)學(xué)模型。由鍵合圖得出功率狀態(tài)方程，并闡明對(duì)系統(tǒng)動(dòng)態(tài)特性影響的因子。 然后，根據(jù)理論分析，對(duì)滑移裝載機(jī)工作裝置液壓系統(tǒng)進(jìn)行實(shí)驗(yàn)測(cè)試，并對(duì)關(guān)鍵測(cè)點(diǎn)的勢(shì)變量、流變量進(jìn)行詳細(xì)分析，并為后文仿真與實(shí)驗(yàn)的對(duì)比分析做好準(zhǔn)備。經(jīng)過(guò)反復(fù)測(cè)試，發(fā)現(xiàn)動(dòng)臂處于下限位時(shí)，若接通多路閥動(dòng)臂聯(lián)下降位的先導(dǎo)控制壓力，鏟斗存在外翻現(xiàn)象。考慮到機(jī)型空間狹小，決定采用仿真來(lái)研究當(dāng)前問(wèn)題。 再次，，在充分研究工作裝置液壓系統(tǒng)工作原理的基礎(chǔ)上，利用AMESim對(duì)液壓系統(tǒng)進(jìn)行建模，利用LMS Virtual Motion對(duì)工作裝置的整個(gè)機(jī)構(gòu)進(jìn)行動(dòng)力學(xué)建模，通過(guò)對(duì)比仿真與實(shí)驗(yàn)的分析結(jié)果，說(shuō)明仿真可以準(zhǔn)確地模擬實(shí)際工況。 最后，利用聯(lián)合仿真發(fā)現(xiàn)實(shí)驗(yàn)中的問(wèn)題出自調(diào)平閥，即：當(dāng)動(dòng)臂處于下限位時(shí)，若接通多路閥動(dòng)臂聯(lián)下降位的先導(dǎo)控制壓力，在高壓環(huán)境下，油液經(jīng)調(diào)平閥閥芯上的阻尼孔進(jìn)入鏟斗油缸大腔，從而導(dǎo)致鏟斗外翻。通過(guò)仿真驗(yàn)證，在調(diào)平閥閥芯上加一單向閥即可解決該問(wèn)題，并保證動(dòng)臂起升時(shí)，鏟斗仍舊能夠自動(dòng)調(diào)平。
[Abstract]:In recent years, the basic construction of our country has gradually improved, gradually entered the maintenance, maintenance stage. In view of the dense urban traffic network, the construction situation is complex. Traditional large-scale construction machinery has been gradually unable to meet the needs of modernization, so small construction machinery has a good development prospects. And slip loader as a typical representative of small construction machinery. It has great advantages in highway maintenance, urban greening and road snow removal. Compared with foreign slip loaders, the technology of slip loaders in China is relatively backward, but large domestic construction machinery manufacturers, such as Xugong, Liugong, Xiagong and so on, have invested a lot of resources in this technical field. It provides a huge power for the development of sliding loader technology in China. This paper is based on the project "performance study of sliding loader chassis mechanism". The dynamic performance of hydraulic system of sliding loader is studied, and the problems found in the experiment are solved by joint simulation. On the basis of theoretical analysis, combined with simulation and experiment, this paper studies a certain type of slip loader in a domestic manufacturer. The specific research contents are as follows: Firstly, the development and technology status of slip loader at home and abroad are analyzed. The technical methods used in hydraulic system and arm structure of working device are briefly described, and the development status of simulation technology at home and abroad is introduced. Furthermore, the technical means used in the study of sliding loader working system are explained in this paper. Secondly, the working principle of the main hydraulic components of the working system is analyzed, and the modeling characteristics of the power bond graph are introduced, and the mathematical model of the related components is established by using the power bond graph. The power state equation is obtained from the bond graph. The factors that affect the dynamic characteristics of the system are illustrated. Then, according to the theoretical analysis, the hydraulic system of the sliding loader working device is tested experimentally, and the potential variables and flow variables of the key measuring points are analyzed in detail. After repeated tests, it is found that when the arm is in the lower limit position, the pilot control pressure of the multi-way valve arm is connected. Because of the small space of the bucket, it is decided to use simulation to study the current problems. Thirdly, on the basis of fully studying the working principle of the hydraulic system of the working device, AMESim is used to model the hydraulic system. Using LMS Virtual. The dynamic modeling of the whole mechanism of the working device is carried out by Motion. By comparing the simulation results with the experimental results, it is shown that the simulation can accurately simulate the actual working conditions. Finally, the joint simulation shows that the problem in the experiment is the leveling valve, that is, when the arm is in the lower position, if the pilot control pressure of the multi-way valve arm drop position is connected, under the high pressure environment. The damping hole in the valve core of the leveling valve enters the large cavity of the bucket cylinder, which results in the bucket overturning. Through simulation, the problem can be solved by adding a one-way valve to the valve core of the leveling valve, and the lifting of the moving arm can be ensured. The bucket can still be leveled automatically.
【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】：2015
【分類(lèi)號(hào)】：TH243

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