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液压支架的工作情况首先取决于它与围岩、工作面支护速度的相互关系,其特征主要是由液压设备保证的工作阻力、初撑力、移动力和移动速度。 研究确定,支架在难冒落顶板煤层中工作时,必须拥有150千牛/米~2的工作阻力。靠相应地提高泵站压力来提高初撑力在技术上有困难,而增加液压支柱的直径和数量又受到支架重量和外形尺寸的限制。现有的手动控制和远距离控制的增压器(压力转换器)增压比低,能力有限。自动控制连续动作的增压器仅仅应用在固定的装置上,因为重量和外形尺寸都大。目前液压系统的控制方法仅仅依靠所采用的压力表。
The working condition of the hydraulic support firstly depends on its interrelationship with the supporting speed of the surrounding rock and working face and its characteristics are mainly the working resistance, initial support force, moving force and moving speed ensured by the hydraulic equipment. The study determined that the support must have an operating resistance of 150 kN / m ~ 2 when working in a coal seam that is difficult to fall off the roof. It is technically difficult to increase the initial propping force by correspondingly increasing the pumping station pressure, and increasing the diameter and number of the hydraulic props is limited by the weight and the size of the bracket. Existing manual control and remote control of the supercharger (pressure converter) booster than low, limited capacity. Automatic control of continuous operation of the supercharger is only applied to the fixed device, because the weight and dimensions are large. The current hydraulic system control methods rely solely on the pressure gauge used.