黑龙江科技大学学报2016，Vol.26Issue(6)：669-674,686,7.DOI:10.3969/j.issn.2095-7262.2016.06.017
变节距下采煤机行走机构的动力学特性
Research on dynamic characteristics of walking mechanism behind shearers with varying pitch
摘要
Abstract
This paper is devoted to overcoming the walking wheel vulnerability to frequent broken teeth resulting from the complex meshing characteristics behind coal shearer walking wheel and pin gear;and eliminating the failure due to abnormal wear.The research using relative motion theory and Newton's second law consists of investigating the mechanics model for elastic connection between the walking wheel and pin gear,rack and rack;providing pin tooth meshing force expression and establishing the dynamics equation of coal running gear;developing the varying curve of the wheel angular velocity,pin tooth meshing force,and the pitch using dynamic simulation method.The research demonstrates that pitch changes have a significant impact on gear meshing force and speed fluctuation and;a walking wheel has a smallest speed fluctuation value,only 2％,such as occurs when the teeth meshing force has a maximum peak occurring near the connection between the two teeth track where a walking wheel experiences a most frequent speed fluctuation,combined with the minimum rack pitch;in this case,pin pitch ranges from the minimum value of 143 mm to the maximum value of 158.5 mm.The results may serve as certain reference for studying the dynamic characteristics of the walking mechanism behind shearers,improving the way walking wheels and racks are subjected to loads,and improving the service life of the walking wheel racks.关键词
行走机构/动力学特性/变节距/弹性模型Key words
walking mechanism/dynamics/varying pitch/elasticity model分类
矿业与冶金引用本文复制引用
张丹,王爱芳,陈国晶..变节距下采煤机行走机构的动力学特性[J].黑龙江科技大学学报,2016,26(6):669-674,686,7.基金项目
黑龙江省自然科学基金项目(QC2015053) （QC2015053）
哈尔滨市科技局创新人才项目(2015RAQXJ017) （2015RAQXJ017）
