【摘要】：鉸接式膠輪車是一種煤礦井下特種運輸車輛,它可往井下直接運輸機械化采煤設備、液壓支架等,運輸快,運輸能力大,可大量節(jié)省輔助操作人員,提高運輸效率。全液壓轉(zhuǎn)向系統(tǒng),轉(zhuǎn)向器與轉(zhuǎn)向機構(gòu)之間無機械連接,通過液壓油管與轉(zhuǎn)向油缸連接,普遍應用在農(nóng)業(yè)機械、工程機械、叉車等行業(yè)。鉸接式膠輪車當前使用的轉(zhuǎn)向系統(tǒng)存在的突出問題是,在轉(zhuǎn)向過程中系統(tǒng)存在壓力振擺,嚴重影響了轉(zhuǎn)向系統(tǒng)的性能。因此本文以鉸接式膠輪車負載傳感全液壓轉(zhuǎn)向系統(tǒng)為研究對象,針對鉸接式膠輪車全液壓轉(zhuǎn)向系統(tǒng)的壓力振擺問題,研究內(nèi)容如下:從鉸接方式入手,對鉸接轉(zhuǎn)向系統(tǒng)進行分析,研究轉(zhuǎn)向油缸壓力和轉(zhuǎn)向油缸行程差的影響因素。為反映實際工況,選用AMESim對全液壓轉(zhuǎn)向系統(tǒng)中的兩個重要元件—優(yōu)先閥和轉(zhuǎn)向器,進行建模,并分析其性能。選用ADAMS建立鉸接式膠輪車虛擬樣機模型。根據(jù)前面建立的轉(zhuǎn)向系統(tǒng)AMESim液壓模型和車體ADAMS虛擬樣機模型,建立較為完整的鉸接式膠輪車全液壓轉(zhuǎn)向系統(tǒng)機液聯(lián)合仿真模型,經(jīng)過對轉(zhuǎn)向系統(tǒng)進行仿真分析,發(fā)現(xiàn)在轉(zhuǎn)向過程中存在較為嚴重的壓力振擺。針對此問題,以左右油缸最大行程差和最大油缸壓力最小為優(yōu)化目標,油缸鉸接點位置為設計變量,對鉸接轉(zhuǎn)向系統(tǒng)進行優(yōu)化設計,并根據(jù)所建立的鉸接式膠輪車全液壓轉(zhuǎn)向系統(tǒng)機液聯(lián)合仿真模型對優(yōu)化結(jié)果進行仿真驗證。仿真結(jié)果表明,優(yōu)化后,轉(zhuǎn)向系統(tǒng)最大壓力減少了18.86%,振擺幅度減少了19.41%,優(yōu)化效果明顯。
[Abstract]:Articulated rubber wheel car is a kind of special transportation vehicle in underground coal mine. It can directly transport mechanized coal mining equipment, hydraulic support, etc. There is no mechanical connection between steering gear and steering mechanism, and it is widely used in agricultural machinery, construction machinery, forklift truck and so on. The main problem in the steering system of articulated rubber wheel vehicle is that there is a pressure vibration in the steering system which seriously affects the performance of the steering system. Therefore, this paper takes the load sensing full hydraulic steering system of articulated rubber wheel vehicle as the research object, aiming at the pressure vibration and pendulum of the full hydraulic steering system of the articulated rubber wheel car, the research contents are as follows: starting with the hinged mode, By analyzing the hinge steering system, the factors influencing the steering cylinder pressure and the stroke difference of the steering cylinder are studied. In order to reflect the actual working conditions, AMESim was selected to model the two important components of the hydraulic steering system, the priority valve and the steering gear, and its performance was analyzed. The virtual prototype model of articulated rubber wheel car is established by using ADAMS. According to the AMESim hydraulic model of steering system and the virtual prototype model of carbody ADAMS, a complete simulation model of hydraulic steering system of articulated rubber wheel car is established, and the steering system is simulated and analyzed. It is found that there are more serious pressure oscillations in the steering process. Aiming at this problem, the optimum design of hinged steering system is carried out with the maximum stroke difference between left and right cylinder and the minimum cylinder pressure as the optimization objective, and the position of the hinge point of the cylinder as the design variable. The optimization results are verified by the combined simulation model of the hydraulic steering system of the articulated rubber wheel car. The simulation results show that the maximum pressure of steering system is reduced by 18.86, the amplitude of vibration and pendulum is reduced by 19.41, and the optimization effect is obvious.
【學位授予單位】：中北大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD525

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