新型正鏟挖掘機工作裝置的動態(tài)特性分析
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本文關(guān)鍵詞：新型正鏟挖掘機工作裝置的動態(tài)特性分析 出處：《燕山大學》2016年碩士論文 論文類型：學位論文
更多相關(guān)文章： 正鏟液壓挖掘機 動態(tài)特性 挖掘圖譜 Kane-Huston法 動力學分析 剛?cè)狁詈?/b>
【摘要】：正鏟液壓挖掘機以其承載能力大,作業(yè)效率高等優(yōu)點,廣泛應用于工業(yè)和民用建筑、交通建設(shè)、基礎(chǔ)設(shè)施建設(shè)。它的運動性能、挖掘力的發(fā)揮狀況、動力學性能、使用壽命都會影響作業(yè)進度和成本。挖掘機的工作裝置作為完成挖掘、提升和裝載任務的核心部件,它的結(jié)構(gòu)特點決定著挖掘機的工作性能,因此對挖掘機工作裝置進行動態(tài)特性研究十分重要。國內(nèi)對正鏟工作裝置構(gòu)型的研究較少,缺乏自主知識產(chǎn)權(quán)的構(gòu)型。因此,本文基于一種新型的正鏟液壓挖掘機工作裝置,對其進行了動態(tài)特性分析。本文首先基于D-H法進行了運動學求解,得到位置正反解,速度和加速度的正解,并對工作裝置的運動性能做了綜合的研究。進行了液壓缸理論挖掘力和整機理論挖掘力分析,運用圖譜疊加法繪制了挖掘圖譜。通過經(jīng)驗公式計算了挖掘阻力,并對其方向進行研究。然后運用Kane-Huston法對新型正鏟液壓挖掘機的工作裝置進行動力學分析,并繪制三組驅(qū)動缸完成一個典型挖掘、提升過程的驅(qū)動力變化曲線。通過虛擬樣機軟件ADAMS對工作裝置進行了動力學仿真,并與Kane-Huston法計算結(jié)果進行對比、驗證。最后采用ADAMS和ANSYS的聯(lián)合仿真技術(shù),建立新型正鏟液壓挖掘機工作裝置的剛?cè)狁詈夏Ｐ?并分析了在一個典型的挖掘、提升過程下工作裝置的動態(tài)強度和有沖擊載荷挖掘條件下工作裝置的動態(tài)強度。
[Abstract]:The hydraulic excavator is widely used in industrial and civil construction, traffic construction, infrastructure construction, its movement performance and the exertion of excavating force due to its advantages such as large bearing capacity and high working efficiency. Dynamic performance, service life will affect the progress and cost of the operation. Excavator working device as the core component to complete the excavation, lifting and loading tasks, its structural characteristics determine the working performance of the excavator. Therefore, it is very important to study the dynamic characteristics of excavator working device. In this paper, the dynamic characteristics of a new type of hydraulic excavator with forward shovel are analyzed. Firstly, the kinematics solution based on D-H method is carried out, and the forward solutions of position, velocity and acceleration are obtained. The movement performance of the working device is studied synthetically. The hydraulic cylinder theoretical excavating force and the whole machine theoretical excavating force are analyzed, the mining map is drawn by the method of map superposition, and the excavation resistance is calculated by empirical formula. Then the dynamic analysis of the working device of the new type forward shovel hydraulic excavator is carried out by using Kane-Huston method, and three groups of driving cylinders are drawn to complete a typical excavation. The driving force curve of the lifting process is simulated by the virtual prototyping software ADAMS, and the results are compared with those of the Kane-Huston method. Finally, the rigid-flexible coupling model of the new type forward shovel hydraulic excavator working device is established by using the joint simulation technology of ADAMS and ANSYS, and a typical excavating model is analyzed. The dynamic strength of the working device under the lifting process and the dynamic strength of the working device under the condition of impact load mining.
【學位授予單位】：燕山大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TU621
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