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通过对某ZY型大采高液压支架四连杆机构进行分析,利用弦位法确定支架由高到低变化的过程中掩护梁的坐标变化,确定掩护梁上端轨迹的最小间距。建立数学模型,推导出液压支架梁端轨迹中一个关键点的计算方程式[1]。基于VC++6.0平台,用枚举法对液压支架在各个杆长变化的条件下进行优化选择,对四连杆机构的轨迹长度进行优化分析后从众多的可能条件中筛选较优的连杆尺寸,并用Matlab软件进行仿真计算,最终寻找到符合设计条件的在确定高度变化范围下的最优四连杆尺寸。
Through the analysis of a four-bar linkage with ZY large mining hydraulic support, the coordinate change of the shield beam during the change from high to low is determined by the chord method, and the minimum spacing of the upper end of the shield beam is determined. The mathematical model is established and the calculation equation of a key point in the beam end trajectory of hydraulic support is deduced [1]. Based on the VC ++ 6.0 platform, using the enumeration method to optimize and select the hydraulic support under the condition of various rod length changes, the optimal linkages are selected from many possible conditions after optimizing the trajectory length of the four- Size, and use Matlab software simulation, and ultimately find the design to meet the design conditions in the determination of the optimal range of the four-link size.