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

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

【摘要】：近年來，我國的基礎(chǔ)建設(shè)已漸趨完善，逐步進入了保養(yǎng)、維護階段。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，因此小型工程機械擁有了良好的發(fā)展前景。而滑移裝載機作為小型工程機械的典型代表，可以配置多種屬具，在公路養(yǎng)護、城市綠化及道路除雪等方面，均具有巨大優(yōu)勢。 相比于國外滑移裝載機來說，我國滑移裝載機技術(shù)相對落后，但是像徐工、柳工、廈工等國內(nèi)較大的工程機械廠家，均在該技術(shù)領(lǐng)域投入了大量的資源，為我國滑移裝載機技術(shù)的發(fā)展提供了巨大的動力。本文基于校企合作項目“滑移裝載機底盤機構(gòu)性能研究”，對滑移裝載機工作裝置液壓系統(tǒng)的動態(tài)性能展開研究，并通過聯(lián)合仿真解決了實驗過程中發(fā)現(xiàn)的問題。 本文在理論分析的基礎(chǔ)上，結(jié)合仿真與實驗，對國內(nèi)某廠家某型號的滑移裝載機展開研究，具體研究內(nèi)容如下： 首先，分析了國內(nèi)外滑移裝載機的發(fā)展現(xiàn)狀及技術(shù)現(xiàn)狀，并對工作裝置液壓系統(tǒng)及動臂結(jié)構(gòu)采用的技術(shù)手段進行簡要闡述。介紹了國內(nèi)外仿真技術(shù)的發(fā)展現(xiàn)狀，進而說明本文在研究滑移裝載機工作系統(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，并運用功率鍵合圖建立了相關(guān)元件的數(shù)學模型。由鍵合圖得出功率狀態(tài)方程，并闡明對系統(tǒng)動態(tài)特性影響的因子。 然后，根據(jù)理論分析，對滑移裝載機工作裝置液壓系統(tǒng)進行實驗測試，并對關(guān)鍵測點的勢變量、流變量進行詳細分析，并為后文仿真與實驗的對比分析做好準備。經(jīng)過反復(fù)測試，發(fā)現(xiàn)動臂處于下限位時，若接通多路閥動臂聯(lián)下降位的先導(dǎo)控制壓力，鏟斗存在外翻現(xiàn)象�？紤]到機型空間狹小，決定采用仿真來研究當前問題。 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對液壓系統(tǒng)進行建模，利用LMS Virtual Motion對工作裝置的整個機構(gòu)進行動力學建模，通過對比仿真與實驗的分析結(jié)果，說明仿真可以準確地模擬實際工況。 最后，利用聯(lián)合仿真發(fā)現(xiàn)實驗中的問題出自調(diào)平閥，即：當動臂處于下限位時，若接通多路閥動臂聯(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入鏟斗油缸大腔，從而導(dǎo)致鏟斗外翻。通過仿真驗證，在調(diào)平閥閥芯上加一單向閥即可解決該問題，并保證動臂起升時，鏟斗仍舊能夠自動調(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.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TH243

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