滚筒结构参数对工作面噪声的影响

Effect of drum structure parameters to noise on coalface

为降低采煤工作面噪声、改善作业环境,建立了滚筒结构参数与工作面噪声关系的数学模型,通过计算机模拟,得到了螺旋滚筒直径和宽度与工作面噪声的关系曲线。结果表明:随着滚筒直径的增加,工作面噪声也逐渐增大,当滚筒直径大于1.4 m时,工作面噪声变化趋缓;随着滚筒宽度的增加,截割阻力增大,工作面噪声近似线性增加。正确设计滚筒直径和宽度,既可保证采煤机很好地完成落煤、装煤任务,又能有效缓解工作面的噪声。

This paper presents an attempt to reduce noise on a coal face and improve working environment. It gives both a mathematical model designed for relation of structure parameters of a drum and relative curves of the noise and diameter as well as width of a spiral drum of a shearer found by means of computer simulation. Results show that noise on a coalface increases along with the drum diameter; the noise tends to be slow when the diameter is larger than 1.4 m ; a cutting resistant rises as drum width enlarges and noise on a coalface increases directly. Reasonable designe of two these parameters allows a shearer to complete breaking down and loading of coal and thus permits an effective reduction of the noise on a coalface.