橡胶输送带压陷阻力实验台动力学特性分析

Analysis of Rubber Conveyor Belt Sag Resistance Experiment Table Dynamics

为研究橡胶输送带压陷阻力实验台工作过程中的动力学特性,以液压缸压力、压辊偏心误差和st 2000型输送带厚度误差作为系统激励,建立了3自由度压陷阻力试验台动力学模型,利用simulink对模型进行求解。结果表明:当液压缸提供的压陷力为10 000 N时,在时域上,压辊和托辊的振动偏大,需提高连接刚度;在频域上,系统激励频率与固有频率相差较大,系统不存在共振情况;从poincare映射可发现系统存在混沌行为;通过试验,验证了理论模型具有一定的准确性。

To study the dynamic characteristics of rubber conveyor belt sag resistance bench working process, by hydraulic cylinder pressure, roll eccentricity error and st2000 conveyor belt thickness error as system incentive, a 3-DOF dynamics sag resistance test bench dynamic model was established The model was solved by using Simulink. The results show that： as provided by the hydraulic cylinder pressure force of I0, 000 N, in the time domain, the vibration of the idler roller and pass roller slants big, which need to improve the connection stiffness. In the frequency domain, the excitation frequency and the natural frequency have larger difference and the system does not exist resonance condition. The poincare mapping shows that the system does exist chaos behavior. Theoretical model was verified by experiment, which has a certain accuracy.