采煤机液压浮动调姿牵引机构的设计与仿真研究

发布时间：2018-02-26 05:25

本文关键词： 采煤机液压浮动调姿牵引机构结构设计仿真研究　出处：《黑龙江科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着我国易采煤区的大幅较少,大功率采煤机在复杂地质条件下中厚煤层采区的应用越来越多,如何保证大功率采煤机在厚煤层采区仍具有高可靠性,从而实现综采工作面的高产高效是当前煤炭行业亟待解决的问题之一。课题研究大功率、大采高采煤机不同工况下的整机受力状态,并结合滑靴的受力变化规律对传统采煤机牵引机构进行了改进,重新设计为包含机身姿态调整系统的采煤机牵引机构——液压浮动调姿牵引机构,并通过ADAMS软件仿真完成了该机构的可行性和实用性研究。首先,建立大功率、大采高滚筒式采煤机整机受力的数学模型,根据模型的特征确定了有效的解算方法,并分析采煤机牵引机构前、后支撑和导向滑靴的负载特点和变化规律;其次,结合采煤机滑靴的受力情况设计采煤机液压调姿牵引机构,给出主要结构尺寸的设计依据和计算方法,并验证该结构设计的实际应用性;最后,应用UGNX建模软件建立调姿牵引机构的三维实体模型,并转入仿真软件ADAMS中,建立液压浮动调姿牵引机构行走轮与齿轨啮合的动力学模型,并将仿真结果与常规牵引机构的仿真结果进行对比分析,同时,为分析该机构对复杂地质条件的适应性,采用不同频率的牵引阻力进行仿真,对比分析外负载变化频率对整个系统运动特性的影响,并通过调整液压缸阻尼系数的方式调整采煤机的运动状态。结果表明,液压浮动调姿牵引机构的添加不仅可以有效改善整机的受力状态,同时满足机身姿态调整需求,证明了带有液压浮动调姿牵引机构采煤机在工作过程中的可行性,通过调整液压缸伸缩运动可以实现支撑点的浮动,达到适应底板起伏不平、均匀载荷的效果,该结构设计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.
【学位授予单位】：黑龙江科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD421.6

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