【摘要】：隨著水資源短缺與社會發(fā)展之間矛盾凸顯的今天,大力發(fā)展節(jié)水灌溉是解決我國水資源短缺的根本出路。針對目前國內外噴灌機組的發(fā)展中存在的適應性差、設備復雜、結構笨重等問題,研制出一種新型輕小型平移式噴灌機。本文通過對其結構的理論分析、強度計算以及與動力學建模仿真相結合的方法,對自制的輕小型平移式噴灌機進行結構設計并討論其在不同坡道的通過穩(wěn)定性。在特定試驗條件下對噴灌機組的水力性能進行試驗。主要研究內容包括以下幾個方面:(1)對自行研制的平移式噴灌機的關鍵部件的設計,使得噴灌機具有易拆卸、噴頭安裝高度與間距可調的特點。通過對灑水車的關鍵部件的受力理論分析,提出提高構件結構強度的方法;對噴灌機自動控制的要求提出簡單、方便的控制方法。(2)對輕小型噴灌機在坡地的通過穩(wěn)定性進行理論受力分析,提出了影響輕小型平移式噴灌機爬坡能力的因素,其中包括機組輪距、質心高度以及附著系數。結果表明:在縱向坡道上勻速行駛,機組前后輪距為3m,質心高度為3.37m時,機組不發(fā)生翻傾的極限坡度角約為26°。在濕土路的附著系數為0.5~0.7的條件下,最大滑移角度t為31°。(3)對輕小型平移式噴灌機進行多體動力學建模仿真。運用多體動力學仿真軟件ADAMS對該機組進行動力學建模,讓建立的整機模型在2D水平路面與不同坡道上分別進行整車通過性能分析,并通過傳感器檢測質心高度的變化情況。結果表明:該新型噴灌機整車的最大爬坡角度小于等于25°時,能夠順利完成仿真,在大于25°時,機組發(fā)生側傾不能正常工作。同時,運用虛擬樣機技術對整機進行仿真與計算,為以后噴灌機組的研發(fā)與推廣使用提供了一種高效的試驗方法。(4)新型平移式噴灌機的噴頭在特定的安裝高度、安裝間距、工作壓力下進行水力性能試驗;對機組灌水量的影響因子進行單因素方差分析與最小二乘法非線性回歸分析,同時對影響其灌水量的主要因素之間進行定量分析。結果表明:在噴頭組合間距為3m,安裝高度為1m,工作壓力為0.07MPa與0.14MPa下,組合噴灌均勻系數均超過了85%,分布均勻性系數也達到了80%。機組運行距離與工作壓力對灌水量影響的顯著性概率分別為0.74和0.08,運行速度比對灌水量的顯著性概率為8.2e-7。
[Abstract]:With the contradiction between water resources shortage and social development prominent today, developing water saving irrigation is the fundamental way to solve water shortage in China. In view of the problems existing in the development of sprinkler irrigation units at home and abroad, such as poor adaptability, complex equipment and heavy structure, a new type of light and small translational sprinkler irrigation machine has been developed. Based on the theoretical analysis, strength calculation and dynamic modeling and simulation of its structure, this paper designs the structure of the self-made light and small translational sprinkler irrigation machine and discusses its stability in different ramps. The hydraulic performance of sprinkler irrigation unit was tested under certain test conditions. The main research contents include the following aspects: (1) the design of the key parts of the self-developed translation type sprinkler irrigation machine makes the sprinkler machine easy to disassemble and the installation height and spacing of the sprinkler head can be adjusted. Based on the analysis of the stress theory of the key parts of the sprinkler, the method of improving the structural strength of the member is put forward, and the requirement of automatic control of the sprinkler is put forward. (2) the theoretical analysis of the stability of the light and small sprinkler irrigation machine on the slope is carried out, and the factors affecting the climbing ability of the light and small translational irrigation machine are put forward, including the wheel spacing, the height of the center of mass and the adhesion coefficient. The results show that the ultimate slope angle of the unit without overturning is about 26 擄when the wheel distance is 3 m and the height of the center of mass is 3.37 m on the longitudinal ramp. The maximum slip angle t is 31 擄under the condition that the adhesion coefficient of wet soil road is 0.5 ~ 0.7. (3) Multi-body dynamics modeling and simulation of light and small translational sprinkler irrigation machine is carried out. The dynamic modeling of the unit is carried out by using the multi-body dynamics simulation software ADAMS, and the vehicle performance analysis is carried out on 2D horizontal road surface and different ramps, and the change of the height of the center of mass is detected by the sensor. The results show that when the maximum angle of climbing is less than or equal to 25 擄, the simulation can be completed successfully, and when the maximum angle of climbing is less than 25 擄, the unit can not work normally when it is larger than 25 擄. At the same time, the virtual prototyping technology is used to simulate and calculate the whole machine, which provides an efficient test method for the later research and development and popularization of the sprinkler group. (4) the nozzle of the new type of translational sprinkler irrigation machine is installed at the specific installation height and the installation distance. Hydraulic performance test was carried out under working pressure, single factor variance analysis and least square nonlinear regression analysis were carried out on the influencing factors of the water quantity of the unit, and quantitative analysis was carried out among the main factors affecting the irrigation quantity. The results show that when the combined nozzle spacing is 3 m, the installation height is 1 m, and the working pressure is 0.07MPa and 0.14MPa, the uniform coefficient of combined sprinkler irrigation exceeds 85 and the distribution uniformity coefficient reaches 80. The significant probability of the influence of the operating distance and the working pressure on the irrigation quantity is 0.74 and 0.08 respectively, and the significant probability of the ratio of running speed to the irrigation quantity is 8.2 e-7.
【學位授予單位】：江蘇大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：S277.94

【參考文獻】

相關期刊論文 前10條

1 萬景紅;朱興業(yè);田坤;鮑亞;;平移式噴灌機組行走速率對噴灌均勻性影響[J];節(jié)水灌溉;2016年09期

2 劉柯楠;吳普特;朱德蘭;陳軍;郭浩;;基于GPS的太陽能平移式噴灌機自主導航系統(tǒng)設計與試驗[J];農業(yè)工程學報;2016年16期

3 陳昕;朱德蘭;葛茂生;李丹;;太陽能平移式噴灌機行走驅動系統(tǒng)配置與性能研究[J];節(jié)水灌溉;2016年04期

4 趙進;湯躍;;高穩(wěn)定性卷盤噴灌機單噴頭噴灑車設計[J];排灌機械工程學報;2015年09期

5 顧哲;湯躍;湯玲迪;陳超;;卷盤式噴灌機卷盤驅動負載計算與分析[J];農機化研究;2015年08期

6 湯躍;趙進;邱志鵬;彭濤;;基于虛擬樣機的桁架式噴灑車穩(wěn)定性動力學仿真[J];農業(yè)機械學報;2015年07期

7 李紅;陳超;袁壽其;高志俊;;中國輕小型噴灌機組現狀及發(fā)展建議[J];排灌機械工程學報;2015年04期

8 袁壽其;李紅;王新坤;;中國節(jié)水灌溉裝備發(fā)展現狀、問題、趨勢與建議[J];排灌機械工程學報;2015年01期

9 佟哲;韓智雷;李偉;邱志鵬;彭濤;;卷盤式噴灌機液壓驅動系統(tǒng)設計[J];中國農機化學報;2014年04期

10 李保明;;中心支軸式噴灌機運行穩(wěn)定性分析[J];農業(yè)與技術;2013年09期

相關碩士學位論文 前3條

1 李振;卷盤式噴灌機盤卷軟管阻力損失研究[D];西北農林科技大學;2015年

2 王朝娜;基于Multigen Creator/Vega的大型平移式噴灌機虛擬試驗研究[D];山東農業(yè)大學;2010年

3 張會娟;絞盤卷管式噴灌機逆向聯(lián)動雙噴頭移動小車的研究與實現[D];西北農林科技大學;2007年

，

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