【作者】 李强；

【导师】 毛君；

【作者基本信息】 辽宁工程技术大学 ， 机械电子工程， 2015， 硕士

【摘要】 为探究采煤机在斜切进刀工况下事故频发的原因,对采煤机斜切进刀工况下的力学特性进行了研究。通过对采煤机进刀工艺原理进行分析,建立了采煤机斜切进刀三维模型；基于斜切进刀三维模型和实际多种开采工况,建立了采煤机斜切进刀工况下整机空间力学模型及其数学模型。推导了斜切进刀工况下滚筒截齿的最大切削厚度及瞬时切削厚度的计算方法；从截齿切削厚度及其变化特征入手,研究了截齿及滚筒的截割阻力特性。从挤煤面积角度结合煤岩破裂理论,推导了斜切进刀工况下滚筒轴向力的计算方法。在明确滚筒截割阻力和轴向力后,得到了斜切进刀工况下的滚筒负载,并利用计算机对其变化特征进行了模拟。将滚筒负载代入到所建立的采煤机斜切进刀整机空间力学模型中进行求解,编程解算出了斜切进刀工况下采煤机滑靴受力情况；依据斜切进刀工况下滑靴受力计算结果,分别对导向滑靴和平滑靴进行了应力分析、疲劳寿命分析,提出了导向滑靴、平滑靴的结构改进措施。在对采煤机斜切进刀工况下力学特性进行理论分析后,提出了测定采煤机斜切进刀工况下滚筒力学特性的可行测试系统,并对测试系统的整体方案及测量截齿、传感器、数据处理软件等关键子系统进行了设计与研究。更多还原

【Abstract】 To explore the reasons why the shearer in oblique cut feeding condition is of frequent accidents, have did some research of mechanical properties on it. Based on the principle of the shearer in oblique cut feeding condition, established the three-dimensional spatial model of shearer in oblique cut feeding condition; established the spatial mechanics model and its mathematical model based on the three-dimensional spatial model. Deduced the calculation method of the maximum cutting thickness and the instantaneous cutting thickness when the shearer in oblique cut feeding condition; Started from the properties and changement of cutting thickness,researched the cutting resistance characteristics of the cutter and the drum.From the angle of crowded coal-petrography area,combined with the coal-petrography failure theory deduced the calculation method of the drum axial force when the shearer in oblique cut feeding condition.After the cutting resistance and axial force was definited, gained the drum load and its change characteristics, and then simulated the load and its change characteristics by computer.Took drum load into the spatial model of shearer in oblique cut feeding condition,and then calculated the stress of the sliding boot stress by programming. Based on the results of sliding boot stress calculation, did analysis of fatigue life and stress on guide sliding boot and smooth sliding boot; after that proposed structure improvement measures on guide sliding boot and smooth sliding boot. After the theoretical analysis, researched the test scheme of drum load and then put forward a feasible test scheme to determine the three-aixs force of cutting tooth and the drum load, designed and researched the test scheme and the key subsystems like cutting measurement tooth sensors, data processing software and so on.更多还原