本文關(guān)鍵詞： 采煤機(jī) 液壓浮動調(diào)姿 牽引機(jī)構(gòu) 結(jié)構(gòu)設(shè)計(jì) 仿真研究　出處：《黑龍江科技大學(xué)》2015年碩士論文　論文類型：學(xué)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(jī)在復(fù)雜地質(zhì)條件下中厚煤層采區(qū)的應(yīng)用越來越多,如何保證大功率采煤機(jī)在厚煤層采區(qū)仍具有高可靠性,從而實(shí)現(xiàn)綜采工作面的高產(chǎn)高效是當(dāng)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(jī)不同工況下的整機(jī)受力狀態(tài),并結(jié)合滑靴的受力變化規(guī)律對傳統(tǒng)采煤機(jī)牽引機(jī)構(gòu)進(jìn)行了改進(jìn),重新設(shè)計(jì)為包含機(jī)身姿態(tài)調(diào)整系統(tǒng)的采煤機(jī)牽引機(jī)構(gòu)——液壓浮動調(diào)姿牽引機(jī)構(gòu),并通過ADAMS軟件仿真完成了該機(jī)構(gòu)的可行性和實(shí)用性研究。首先,建立大功率、大采高滾筒式采煤機(jī)整機(jī)受力的數(shù)學(xué)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(jī)牽引機(jī)構(gòu)前、后支撐和導(dǎo)向滑靴的負(fù)載特點(diǎn)和變化規(guī)律;其次,結(jié)合采煤機(jī)滑靴的受力情況設(shè)計(jì)采煤機(jī)液壓調(diào)姿牽引機(jī)構(gòu),給出主要結(jié)構(gòu)尺寸的設(shè)計(jì)依據(jù)和計(jì)算方法,并驗(yàn)證該結(jié)構(gòu)設(shè)計(jì)的實(shí)際應(yīng)用性;最后,應(yīng)用UGNX建模軟件建立調(diào)姿牽引機(jī)構(gòu)的三維實(shí)體模型,并轉(zhuǎn)入仿真軟件ADAMS中,建立液壓浮動調(diào)姿牽引機(jī)構(gòu)行走輪與齒軌嚙合的動力學(xué)模型,并將仿真結(jié)果與常規(guī)牽引機(jī)構(gòu)的仿真結(jié)果進(jìn)行對比分析,同時(shí),為分析該機(jī)構(gòu)對復(fù)雜地質(zhì)條件的適應(yīng)性,采用不同頻率的牽引阻力進(jìn)行仿真,對比分析外負(fù)載變化頻率對整個(gè)系統(tǒng)運(yùn)動特性的影響,并通過調(diào)整液壓缸阻尼系數(shù)的方式調(diào)整采煤機(jī)的運(yùn)動狀態(tài)。結(jié)果表明,液壓浮動調(diào)姿牽引機(jī)構(gòu)的添加不僅可以有效改善整機(jī)的受力狀態(tài),同時(shí)滿足機(jī)身姿態(tài)調(diào)整需求,證明了帶有液壓浮動調(diào)姿牽引機(jī)構(gòu)采煤機(jī)在工作過程中的可行性,通過調(diào)整液壓缸伸縮運(yùn)動可以實(shí)現(xiàn)支撐點(diǎn)的浮動,達(dá)到適應(yīng)底板起伏不平、均勻載荷的效果,該結(jié)構(gòu)設(shè)計(jì)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(xué)位授予單位】：黑龍江科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD421.6

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本文編號：1536699