掩护式支架平衡千斤顶定位尺寸的模拟分析与优化设计

平衡千斤顶是二柱掩护式支架的关键部件，在实际工作过程中时常发生损坏。本文以二柱直接撑顶的掩护式支架为例，建立了支架承载能力区的理论；对平衡千斤顶的定位尺寸进行了计算机模拟分析、优化设计及模型试验的研究。研究结果表明，增大平衡千斤顶上耳座的定位尺寸或减小平衡千斤顶下耳座的定位尺寸，可增大顶梁与掩护梁间的夹角，提高支架的承载能力，改善支架对顶板的适应性，是防止平衡千斤顶及其连接耳座免遭损坏的有效措施之一。

SIMULATION AND OPTIMUM DESIGN OF LOCATING DIMENSIONS OF SHIELD SUPPORT BALANCE RAM

Balance ram is a key component of a two-leg shield support.It is usually damaged in operation.This paper builds up theory of load-carrying capability area of a shield support,using a 2-leg shield support as an example.Computer simulation,optimum design and model test for finding optimal locating dimensions of the balance ram are made.The results show that increased dimension of the upper joint or decreased dimension of the low joint of the balance ram can increase the included angle between the canopy and debris shield,and raise the load-carrying ability of the support,and also improve adaptability of the support.It is one of the effective measures for protecting the balance ram and joints from being damaged.