本文關鍵詞： 采煤機 液壓浮動調姿 牽引機構 結構設計 仿真研究　出處：《黑龍江科技大學》2015年碩士論文　論文類型：學位論文

【摘要】：隨著我國易采煤區(qū)的大幅較少,大功率采煤機在復雜地質條件下中厚煤層采區(qū)的應用越來越多,如何保證大功率采煤機在厚煤層采區(qū)仍具有高可靠性,從而實現(xiàn)綜采工作面的高產高效是當前煤炭行業(yè)亟待解決的問題之一。課題研究大功率、大采高采煤機不同工況下的整機受力狀態(tài),并結合滑靴的受力變化規(guī)律對傳統(tǒng)采煤機牽引機構進行了改進,重新設計為包含機身姿態(tài)調整系統(tǒng)的采煤機牽引機構——液壓浮動調姿牽引機構,并通過ADAMS軟件仿真完成了該機構的可行性和實用性研究。首先,建立大功率、大采高滾筒式采煤機整機受力的數(shù)學模型,根據(jù)模型的特征確定了有效的解算方法,并分析采煤機牽引機構前、后支撐和導向滑靴的負載特點和變化規(guī)律;其次,結合采煤機滑靴的受力情況設計采煤機液壓調姿牽引機構,給出主要結構尺寸的設計依據(jù)和計算方法,并驗證該結構設計的實際應用性;最后,應用UGNX建模軟件建立調姿牽引機構的三維實體模型,并轉入仿真軟件ADAMS中,建立液壓浮動調姿牽引機構行走輪與齒軌嚙合的動力學模型,并將仿真結果與常規(guī)牽引機構的仿真結果進行對比分析,同時,為分析該機構對復雜地質條件的適應性,采用不同頻率的牽引阻力進行仿真,對比分析外負載變化頻率對整個系統(tǒng)運動特性的影響,并通過調整液壓缸阻尼系數(shù)的方式調整采煤機的運動狀態(tài)。結果表明,液壓浮動調姿牽引機構的添加不僅可以有效改善整機的受力狀態(tài),同時滿足機身姿態(tài)調整需求,證明了帶有液壓浮動調姿牽引機構采煤機在工作過程中的可行性,通過調整液壓缸伸縮運動可以實現(xiàn)支撐點的浮動,達到適應底板起伏不平、均勻載荷的效果,該結構設計起到了特殊平衡功能。
[Abstract]:With the large number of coal mining areas in China, the application of high-power shearer in the mining area of medium and thick coal seam under complex geological conditions is more and more, how to ensure that the high-power shearer still has high reliability in thick coal seam mining area. In order to realize the high yield and high efficiency of fully mechanized coal mining face, it is one of the problems to be solved urgently in the coal industry at present. The traditional traction mechanism of shearer is improved according to the changing law of sliding boots. It is redesigned as the traction mechanism of the shearer, which includes the fuselage attitude adjustment system-hydraulic floating attitude adjusting traction mechanism. The feasibility and practicability of the mechanism are studied by ADAMS software simulation. Firstly, the mathematical model of high power and large mining height drum shearer is established, and the effective calculation method is determined according to the characteristics of the model. It also analyzes the load characteristics and variation law of the front and rear support and guide sliding boots of shearer. Secondly, combined with the mechanical condition of shearer slipper, the paper designs the hydraulic posture adjusting traction mechanism of shearer. The design basis and calculation method of the main structural dimensions are given, and the practical application of the structure design is verified. Finally, the three-dimensional solid model of the orientation adjusting traction mechanism is established by using the UGNX modeling software, and transferred to the simulation software ADAMS. The dynamic model of the engagement between the walking wheel and the tooth rail of the hydraulic floating attitude adjusting traction mechanism is established, and the simulation results are compared with the results of the conventional traction mechanism. At the same time, the adaptability of the mechanism to the complex geological conditions is analyzed. The traction resistance of different frequencies is used to simulate, and the influence of the frequency of the external load on the motion characteristics of the whole system is compared and analyzed, and the motion state of the shearer is adjusted by adjusting the damping coefficient of the hydraulic cylinder. The results show that, The addition of hydraulic floating attitude adjusting traction mechanism can not only effectively improve the mechanical state of the whole machine, but also meet the needs of the fuselage posture adjustment, which proves the feasibility of the shearer with the hydraulic floating attitude adjusting traction mechanism in the working process. By adjusting the telescopic motion of the hydraulic cylinder, the floating of the supporting point can be realized, which can adapt to the effect of uneven bottom plate and uniform load. The structure design has a special balance function.
【學位授予單位】：黑龍江科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD421.6

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