刮板输送机扭转振动力学模型构建与过弯曲段工况分析

CONSTRUCTION OF TORSIONAL VIBRATION MECHANICS MODEL OF SCRAPER CONVEYOR AND ANALYSIS OF WORKING CONDITIONS THROUGH BENDING SECTION

对刮板机受扭状态下的物理性质的研究,首先对刮板输送机经过输送机弯曲段时的过程进行分析,并在此基础上依据动力学模型借助计算机分析弯曲段弯矩以及其附加阻力大小。引入Voigt弹粘性模型作为处理方法,建立模型,再利用Matlab编程实现分析的前处理。最后通过数据仿真得到刮板机过弯曲段的不同位置、不同物料载荷工况下的系统(扭转、振动、速度等)特征数据。分析结果显示:刮板机通过弯曲段时,系统会产生一定的扭摆振动情况;对于有无物料而言,刮板机可看作分别处于有载和空载阶段。空载工况下扭摆振强度况较前后方均有载时更为显著;对于整个刮板机而言,其通过弯曲段过程中,越靠近机尾处的刮板链条系统其(摆动、振动、速度等)特征变化越显著。

This article is a study on the physical properties of the scraper under torsion. At first, the process of the scraper conveyor passing through the curved section of the conveyor is analyzed, and then on this basis, the bending moment and the additional resistance of the curved section are analyzed with the aid of a computer based on the dynamic model. Introduce the Voigt elastic viscosity model as a processing method, establish the model, and then use MATLAB programming to realize the pre-processing of the analysis. Finally, through data simulation, the characteristic data of the system(torsion, vibration, speed, etc.) under different material loading conditions at different positions of the scraper through the bending section are obtained. The analysis results show that when the scraper passes through the bending section, the system will produce a certain torsional vibration;for the presence or absence of materials, the scraper can be regarded as being in the load and no-load stages. The torsional vibration intensity is more pronounced under no-load conditions than when the front and rear are loaded;for the entire scraper, when it passes through the bending section, the closer the scraper chain system(swing, vibration, Speed, etc.) the more significant the feature changes.