本文關(guān)鍵詞： 電液比例 微動(dòng)性 汽車(chē)起重機(jī) 起升機(jī)構(gòu) 建模仿真　出處：《沈陽(yáng)建筑大學(xué)》2013年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：近年來(lái),隨著我國(guó)經(jīng)濟(jì)迅猛發(fā)展,國(guó)民建設(shè)工程量的增加,汽車(chē)起重機(jī)被廣泛應(yīng)用于各領(lǐng)域。起升機(jī)構(gòu)作為汽車(chē)起重機(jī)的重要組成部分,由于其直接面向起吊重物反復(fù)升降,因此,起升機(jī)構(gòu)液壓系統(tǒng)對(duì)于整機(jī)性能至關(guān)重要。目前,大型汽車(chē)起重機(jī)主要應(yīng)用在大型工程的安裝過(guò)程中,要求起升系統(tǒng)微動(dòng)性好,可實(shí)現(xiàn)在吊裝過(guò)程中重物起降平穩(wěn)且有較高的安裝精度。通過(guò)計(jì)算機(jī)仿真技術(shù),對(duì)起升機(jī)構(gòu)液壓系統(tǒng)的微動(dòng)性進(jìn)行研究,給出了改善起升回路微動(dòng)性的兩種方法,可以為研究其他工程機(jī)械液壓系統(tǒng)的微動(dòng)性和為多路閥設(shè)計(jì)提供借鑒作用。 本文首先介紹了電液比例技術(shù)的發(fā)展和目前其在汽車(chē)起重機(jī)領(lǐng)域的應(yīng)用概況,簡(jiǎn)述了汽車(chē)起重機(jī)液壓系統(tǒng)的組成及特點(diǎn)和液壓系統(tǒng)采用的較為流行的技術(shù),分析了比例電磁鐵原理和結(jié)構(gòu)特點(diǎn)。 本文以某廠(chǎng)生產(chǎn)的70噸汽車(chē)起重機(jī)的起升機(jī)構(gòu)液壓系統(tǒng)作為研究對(duì)象,借助Ansoft和AMESim軟件對(duì)電液比例先導(dǎo)閥建模,通過(guò)設(shè)計(jì)計(jì)算和已掌握的樣本數(shù)據(jù)進(jìn)行反推計(jì)算,確定仿真參數(shù),分析位移-力和電流-力特性曲線(xiàn),確定模型正確。對(duì)起升機(jī)構(gòu)液壓系統(tǒng)進(jìn)行建模,通過(guò)設(shè)定起降的模擬工況,分析閥芯位移與輸出流量及物體位移量之間的關(guān)系,研究起升機(jī)構(gòu)液壓系統(tǒng)的微動(dòng)性和多路閥影響微動(dòng)性的因素。 本文借助計(jì)算機(jī)仿真技術(shù),對(duì)大型汽車(chē)起重機(jī)起升機(jī)構(gòu)的液壓系統(tǒng)進(jìn)行建模分析,研究采用電液比例技術(shù)應(yīng)用在起升機(jī)構(gòu)中可以改善系統(tǒng)微動(dòng)性,分析了影響微動(dòng)性的因素,提出了改善微動(dòng)性的方案,為評(píng)價(jià)工程機(jī)械液壓系統(tǒng)微動(dòng)性和多路閥優(yōu)化改進(jìn)提供一種研究方法。
[Abstract]:In recent years, with the rapid development of China's economy and the increase of national construction quantity, truck cranes are widely used in various fields. Lifting mechanism as an important part of truck cranes. Because it is directly oriented to the lifting of heavy objects, the lifting mechanism hydraulic system is very important to the performance of the whole machine. At present, the large truck crane is mainly used in the installation process of large engineering. The lifting system is required to have good fretting performance, which can realize the steady take-off and landing of heavy objects in the hoisting process and has higher installation precision. The fretting performance of hydraulic system of hoisting mechanism is studied by computer simulation technology. Two methods to improve the fretting performance of hoisting circuit are presented, which can be used as reference for the study of the fretting performance of hydraulic systems of other construction machinery and for the design of multi-way valves. This paper first introduces the development of electro-hydraulic proportional technology and its application in the field of automobile crane, briefly describes the composition and characteristics of hydraulic system of truck crane and the more popular technology used in hydraulic system. The principle and structure characteristics of proportional electromagnet are analyzed. In this paper, the hydraulic system of lifting mechanism of 70 ton truck crane produced by a factory is taken as the research object, and the electro-hydraulic proportional pilot valve is modeled with the help of Ansoft and AMESim software. Through the design calculation and the sample data obtained, the simulation parameters are determined, the displacement-force and current-force characteristic curves are analyzed, and the model is correct. The hydraulic system of the hoisting mechanism is modeled. By setting the simulated condition of take-off and landing, the relationship between valve core displacement, output flow rate and object displacement is analyzed, and the fretting characteristics of hydraulic system of lifting mechanism and the factors influencing fretting performance by multi-way valve are studied. In this paper, the hydraulic system of the lifting mechanism of a large truck crane is modeled and analyzed by computer simulation technology. The application of electro-hydraulic proportional technology in the lifting mechanism can improve the fretting performance of the system. The factors affecting fretting property are analyzed and the scheme of improving fretting property is put forward. It provides a research method for evaluating fretting performance of hydraulic system of construction machinery and optimizing improvement of multi-way valve.
【學(xué)位授予單位】：沈陽(yáng)建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TH213.6

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