Dynamic Simulation Of The Broken-belt Catch Process For The Belt Conveyor

Belt conveyor is used widely in the coal industry with the leverage of low transport costs,running smoothly and the adaptations for the complex routes. But the most conveyor trouble is the belt broken which affected by the own and extraneous interference. Event of accident may cause coal abnormal production and casualties. The safety device to protect the security of the machine, to a large extent, can protect against financial losses resulting from the accident.This article analyzed the research status and latest progress about belt-broken catcher, and also compared their advantages and disadvantages for different types. Based on this, this paper took the wedge belt-broken catcher as research object and the capture force of the wedge belt-broken catcher can be predicted by means of mathematical models. By analyzing the model, the self-locking values range of wedge angle was pointed out. The dynamic characteristics of the conveyor belt were investigated, and then we can deduce the equivalent elastic modulus of the belt. Given the dynamical equation which based on the Voigt to reflect the broken belt capture process, besides, the design should consider three terms, which include the reason why belt broken, the position where belt broken and the operation condition after belt broken. We also had to consider calculating the correct installation distance of conveyor.Lastly, dynamics simulation program in capturing stage was written by MATLAB to achieve the experimental results of the broken belt capture process. The thesis uses MATLAB as the simulation platform to analyze the theory mentioned above. A conclusion from the examination and the analysis of examination result is drawled. Finally, according to the results,we found that the terms, including the different installing, the wedge angle and the operation condition, all have an influence on the result of the broken belt capture. This laid the foundations for later belt-broken catcher designs.The results in this paper showed that: The capture effect of belt-broken catcher which installed in accordance with different spacing was much better than the one with uniformly-spaced. Under the self-locking condition, the breaking time and breaking distancedecreased with increasing the wedge angle. The breaking time increased and the breaking distance decreased with increasing the volumes of conveyor. The speed of conveyor was not in evidence with the breaking distance. The breaking time and breaking distance increase rapidly when the angle of conveyor increasing.