胶带运输机的振动特性

On Vibration Features of Belt Conveyors

本文从推导胶带的运动微分方程和折算弹性模量开始入手,根据胶带发生振动时的运动特点和受力情况,列出了描述它的数学物理方程,并用拉氏变换法,求出了共振时胶带各点的位移表达式和共振频率表达式,进而提出了避免发生共振现象的合理拉紧速度,为设计自动拉紧装置的拉紧速度提供了依据。最后,通过对广东云浮硫铁矿2号胶带运输机进行现场测试,进一步验证了所推导的公式和结论。

A differential equation, as well as an equivalent elastic module, is first obtained concerning the belt motion. Then a mathematic-physical equation is established considering the belt motion features and stress distribution patterns during vibrations Further expressions are deduced,through Laplace Transformation, respectively as to displacement of a given particle during resonance andas to the resonance frequency,expressinos upon which a reasonable tightening speed is proposed to avoid resonance from happening and consequently basis is built for the desingning of an automatic tightener. Finally, field observations are conducted at the site of Belt Conveyor No.2 at Yuofu Iron Ore Mine of Gnangdong and all the equations and conclusions enumerated above are testified