滚筒式采煤机调高机构机液联合仿真研究

Research of Co—simulation of Mechanical and Hydraulic System of Drum Shearer Height—regulating Mechanism

为精确验证滚筒式采煤机调高机构工作可靠性与稳定性,利用ADAMS/Hydraulics插件建立了调高机构液压系统模型,并将其与机械系统模型进行耦合,实现了调高机构的机液联合仿真。根据实际工况,用Matlab模拟了最恶劣工况下滚筒所受的瞬时负载,在ADAMS中以Akima拟合的spline函数的形式将其施加给滚筒。结合实际项目,对滚筒调高至工作面顶部并进行截割这一过程进行仿真,对仿真所得的滚筒所受台力和合力矩曲线、液压缸受力曲线、液压缸长度和速度曲线、无杆腔压力及流量曲线进行分析,结果表明此调高机构具有一定的稳定性和可靠性,此方法能够为今后采煤机调高机构的设计与优化提供借鉴。

To validate accurately working reliability and stability of drum shearer height--regulating mechanism, the model of height-- regulating mechanism hydraulic system was established by using the ADAMS/Hydraulics plugin, and the model of hydraulic system and the model of mechanical system were coupled, which achieved co--simulation of the mechanical and hydraulic system of drum shearer height-- regulating mechanism. According to the actual working condition, the instantaneous loads of drum in the worst working condition were sim- ulated by using Matlab, which was imposed on drum in the form of spline function by Akima fitting method in ADAMS. Combining with ac- tual project, the process of drum adjusted height to the top of working face then cutting coal was simulated, and analyzed the resultant force and torque curves of drum, the force curve of hydraulic cylinder, length and speed curves of hydraulic cylinder and pressure and the flow curves of rodless cavity. The simulation results show that the height--regulating mechanism has certain stability and reliability, and this method can provide lessons for the design and optimization of drum shearer height--regulating mechanism in the future.