复杂煤层采煤机滚筒载荷的数值模拟

为解决复杂煤层下工作的采煤机截齿磨损严重、缺失以及滚筒寿命低等问题,通过分析截齿与煤岩的接触位姿以及单齿的力学模型,建立了复杂煤层条件下采煤机滚筒的力学模型。为便于工程分析与应用,适当简化了截齿与煤岩的截割状态,以离散随机过程判断每一时刻截割过程中的受力状态,给出了复杂煤层下采煤机滚筒载荷的模拟算法。该模拟算法可实现任意旋转周期内滚筒三向载荷和负载扭矩的模拟,为采煤机滚筒的数字化设计提供条件。

Numerical simulation of shearer drum loads on complex coal seam

Directed at overcoming severe wear and break of shearer picks operating in a more complicated coal seams,and lower service life of drum,this paper describes the development of mechanical model of the shearer drum designed for a more complex coal seam by investigating the contact postures between picks and coal and mechanical model of single pick.The paper features a simulation algorithm of shearer drum loads tailored to complex coal seams to facilitate engineering analysis and application by properly simplifying cutting state of picks and coal and determining the force state occurring between them by way of discrete stochastic process.The algorithm allows the simulation of three directional loads and torque of shearer drum on some rotating period,thus contributing to digital design of shearer drum.