| Modeling, Analysis, Optimization and Decision |
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| The analysis of the shearer dynamic feature in the coupling relation between the the motivation and the drum vibration |
| CHEN Hong-yue1, LIU Lie-bei1, MAO Jun1, SONG Qiu-shuang2, YUAN Zhi2 |
1. College of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, China;
2. China National Coal Mining Equipment Co., Ltd., Beijing 100011, China |
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Abstract In order to study the dynamic feature of shearer in the process of cutting and its influence on cutting load, the drum cutting loading was described by the sharp-pick cutting resistance model. The drive load of walking wheel was described by gear mesh model with clearance. The friction load of the smooth shoe was described by Coulomb friction model. The five degree freedom dynamics model of the shearer was established, which was solved by the method of ode45. The result showed that when the hardness of coal rock f=3 and the walking speed was 3 m/min, the vibration amplitude of the shearer's right arm was about 0.8×10-4 rad , the vibration amplitude of the left arm was about 0.4×10-5 rad; the vibration amplitude of the body was -1.4~+1.4 mm/s; the angular velocity of the right and left rocker arm was -1×10-3~+1×10-3 and -4.5×10-4~+4.5×10-4 rad/s. By comparing weather the drum vibration was considered, the result showed that the drum vibration was beneficial to the coal cutting. Through the experimental measurement of the right rocker arm vibration, it was found that the real value and the fluctuation range was basically the same. The result shows that the dynamic model of the shearer has certain accuracy.
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Received: 05 June 2015
Published: 28 June 2016
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激励与滚筒振动耦合下采煤机动力学特性分析
为了研究采煤机截割过程中的动力学特性及其对截割载荷的影响,采用含滚筒振动量的锋利截齿截割阻力模型描述滚筒截割载荷,采用含间隙齿轮啮合模型描述行走轮驱动载荷,采用库伦摩擦模型描述平滑靴摩擦载荷,建立了采煤机整机五自由度动力学模型,利用ode45对模型求解.结果表明:当煤岩硬度f=3,行走速度为3 m/min时,采煤机右摇臂振动幅值约为0.8×10-4rad,左摇臂振动幅值约为0.4×10-5rad;机身振动速度在-1.4~+1.4 mm/s间波动,右、左摇臂的振动角速度分别在-1×10-3~+1×10-3 rad/s和-4.5×10-4~+4.5×10-4 rad/s间波动;通过对比考虑滚筒振动和未考虑滚筒振动时的截割载荷,表明滚筒的振动有利于对煤岩的截割;对右侧摇臂的振动量进行了实验测量,其大小及波动范围与仿真值较为接近,说明采煤机的动力学模型具有一定的准确性.
关键词：
采煤机,
动态特性,
截割性能,
非线性,
实验研究
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