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通过空间矩阵单元法建立采煤机连接架空间刚体力学模型和静力平衡方程;通过在连接架与摇臂铰接耳板处布置传感器,提出一套基于无线传输的载荷实时监测系统;通过测试实验,获得采煤机连接架在斜切进刀与直线截割阶段的工况载荷数据,并结合测试实验数据对模型静力平衡方程进行求解,获得连接架与机身铰接处载荷;结合直线截割部分测试载荷数据,通过ncode-designlife对铰接耳板模型进行疲劳寿命分析,并获得铰接耳板疲劳断裂损伤平面;分析论表明:截割过程中连接架的最大应力集中发生在煤壁侧上部铰接耳板根部;连接架失效形式主要为直线截割条件下的疲劳断裂,直线截割工况下连接架铰接耳板工作寿命约为268.64天。
The space rigid body mechanics model and the static balance equation of the shearer connecting frame are established by the space matrix element method. A real-time load monitoring system based on wireless transmission is proposed by arranging the sensors at the hinge plate of the connecting frame and the rocker arm. , The working load data of the shearer connecting frame in the process of bevel cutting and linear cutting are obtained, and the static equilibrium equation of the model is solved by combining the experimental data with the experimental data to obtain the load at the joint of the connecting frame and the fuselage; Cutting part of the test load data, through ncode-designlife fatigue model analysis of the hinge plate, and get hinged ear plate fatigue fracture damage plane; analysis shows that: the maximum stress during the cutting frame connection occurred in the upper part of the coal wall side Hinged ear plate root; connector failure form is mainly under the condition of linear cutting fatigue fracture, straight-line cutting articulated operating conditions of the ear plate is about 268.64 days.