掘进机电控箱减振系统建模及参数匹配分析
Research on Buffer System Modeling and Its Parameters Matching Analysis for Electric Control Box of Roadheader

掘进机作业工况恶劣，机体振动易导致机载振动敏感部件电控箱内电气元件失灵,进而影响电控箱的可靠性。为研究电控箱的振动特性，建立了掘进机电控箱阻尼缓冲模型，以电控箱的垂向加速度和俯仰角加速度作为评价指标，对电控箱减振器的刚度系数和阻尼系数进行了参数匹配分析，综合考虑参数间的相互影响，确定了电控箱减振器的最佳匹配参数。匹配后的电控箱垂向振动加速度均方根和俯仰角加速度均方根与原减振器相比分别减小了16.05%,9.45%。该研究对掘进机电控箱减振器结构改进以及动态特性分析具有参考价值。
The electric control box of the roadheader suffers severe load such as vibration and shock at work，as a result，failing to work normally since large vibration causes electrical components malfunction, shedding,welding point fatigue damage.In order to investigate vibration characteristics of the electric control box, the dynamic model of the damping buffer system of the electronic control box is set up. Taking the vertical acceleration and pitching angular acceleration of electric control box as the evaluation index, the matching of stiffness and damping coefficient of the absorber is analyzed. The results show that the stiffness and damping of the electric control box absorber plays a good vibration buffer effect. Considering coupling effect of the front and rear absorber stiffness and damping coefficient on the vertical acceleration and pitching angular acceleration, the best matching value are determined. Comparing with the original absorber, the new one with reasonable parameters produce better results, as the vertical acceleration RMS and pitching angular acceleration RMS decreases by 16.05% and 9.45% respectively. At the same time, it can also provide references for the improvements of vibration isolation system and dynamic characteristics analysis for electric control box.