Virtual Simulation Analysis of Rigid-Flexible Coupling Dynamics of Shearer with Clearance
Virtual Simulation Analysis of Rigid-Flexible Coupling Dynamics of Shearer with Clearance
复制标题
带间隙采煤机刚柔耦合动力学虚拟仿真分析
DOI：
10.1155/2018/6179054
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发表时间：
2018-01-01
影响因子：
1.6
通讯作者：
Song, Qiushuang
中科院分区：
文献类型：
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作者：
Chen, Hongyue;Zhang, Kun;Song, Qiushuang
针对刮板输送机销排及其支撑机构存在的寿命不匹配、可靠性低等问题，建立了采煤机刚柔耦合的虚拟仿真分析模型。以实验滚子载荷为刺激进行了仿真。分析结果表明，在采煤机剪切过程中，托辊上的垂直剪切力起到了减小平面支承板载荷的作用，且在采煤机运动方向上，右侧平面支承板上的受力明显小于左侧平面支承板上的受力。由于滚轮牵引载荷的作用，作用在两个导向支承板上的载荷沿采煤机运动方向明显增大。通过实验确定了支撑机构的力学特性，验证了虚拟仿真模型的准确性。同时，对采煤机支承机构在不同俯仰角和横摇角下的力学特性进行了研究。该研究为分析采煤机的力学特性和优化结构设计提供了依据。通过对支撑板的疲劳寿命分析和后续支撑板结构的优化，发现导轨支撑板的寿命延长了约1.5倍。
A model for virtual simulation analysis of the rigid-flexible coupling of a shearer has been developed with the objective of addressing problems associated with lifetime mismatch and low reliability of pin rows of a scraper conveyor and the corresponding support mechanism of a shearer. Simulations were performed using the experimental roller load as stimulus. Results of the analysis demonstrate that the vertical cutting force on the roller serves to reduce the load on the plane support plates during shearer cutting, and the force on the right plane support plate is considerably smaller compared to that on the left plane support plate along the direction of motion of the shearer. Owing to action of the roller-traction load, loads acting on the two guiding support plates increase significantly along the direction of shearer motion. Mechanical characteristics of the support mechanism were determined through experiments, and the accuracy of the virtual simulation model was verified. Simultaneously, mechanical characteristics of the shearer support mechanism were studied under varying pitch and roll angles. This study was performed to provide a base for analyzing the mechanical characteristics as well as optimizing the structural design of the shearer. Through fatigue-life analysis of the support plate and subsequent optimization of the support plate structure, the life of the guide support plate was found to have been extended by approximately 1.5 times.