采煤机液压拉杠力学检测系统研究

Research on mechanical detecting system of hydraulic rod on shearer

为了研究复杂工况下采煤机液压拉杠的力学特性,采用液压拉杠固定垫片处设置压力环传感器的方法,对不同截煤工况下采煤机液压拉杠的拉力变化进行实时在线检测,采用无线信号收发模块实现检测数据的实时传输。实验表明:液压拉杠所受拉力的大小及波动与其位置和采煤机截煤工况均有关,其中位于煤壁侧上处的拉力最大,采空侧下处的载荷波动最剧烈;斜切进刀过程中,采空侧下、采空侧上、煤壁侧下和煤壁侧上等4处液压拉杠的最大拉力分别为495.345,379.85,493.294,539.33kN。研究结果为液压拉杠的设计优化提供重要依据。

To study the mechanical property of hydraulic rods on shearer under complex workingconditions,an experimental platform used to analyse the mechanical properties of the isometric shearer was built.By the method of pressure ring sensors replacing shims,the real-time online detection of pull tension change of hydraulic rods on shearer under the different cutting condition was carried out,and the signal was transmitted online by wireless signal launcher.The results of the experiment indicated that the force was relevant to both hydraulic rod＇s location and shearer＇s working conditions,with the maximum tensile in the upper coal wall side and the most severe load fluctuation in the low goaf side,and that four groups of average traction force under the condition of oblique cutting,which provided important basis for the design optimization of hydraulic rods,were as follows：in the low and upper goaf side were 495.345 kN and 379.85 kN,and in the low and upper coal wall side were 493.294 kN and 539.33 kN.The research results provide an important basis for the optimization design of hydraulic pull rod.