32t上开式扇形闸门箕斗卸载曲轨的动力学研究

发布时间：2018-04-16 03:07

本文选题：大吨位箕斗 + 卸载曲轨　；参考：《河北工程大学》2015年硕士论文

【摘要】：曲轨自动卸载是矿井箕斗常用的一种卸载方式,当箕斗使用这种卸载方式时,提升系统的休止时间缩短,矿井的工作效率提高,同时系统的安装和运行维护的费用也比较低,在煤矿行业深受欢迎。当大吨位箕斗使用曲轨自动卸载的方式时,所需闸门的开启力增大,曲轨的受力也会成倍地增加,而且曲轨的受力很不均匀,导致卸载轮和曲轨过度的磨损,从而造成安全隐患,给企业带来不必要的损失。本文以32t上开式扇形闸门箕斗为研究对象,以优化曲轨曲线的形状为目标,对现有卸载曲轨的不足进行分析,研究对比4种卸载曲轨在工作时的受力情况,从而找到更加适合于32t箕斗的卸载曲轨的形状。本文的研究内容如下:(1)首先对上开式扇形闸门箕斗的结构特点和工作原理进行分析,提出箕斗在卸载过程中可能出现的问题;然后对曲轨的受力进行理论计算,找到曲轨受力的影响因素;最后创建箕斗的实体模型;(2)针对在箕斗卸载过程中出现的问题,运用理论知识对4种曲轨卸载曲线进行研究并创建其数学模型,经过计算获得箕斗在每一种曲轨中运行时闸门开启的角速度和角加速度曲线,通过对比分析找到理想的卸载曲线;(3)在三维建模软件中分别创建各个曲轨的实体模型,在装配模块中将各个曲轨分别与箕斗进行装配,然后将所建立的箕斗和曲轨实体模型保存成通用格式导入到仿真软件中,进行仿真得到箕斗在各个曲轨中运行时的曲轨受力图以及卸载轮的速度图和加速度图,验证理想卸载曲轨的正确性。(4)分析卸载曲轨的主要磨损形式,并对理想卸载曲轨的接触疲劳强度进行校核,验证曲轨是否满足材料的强度要求。使用Abaqus软件对卸载曲轨进行有限元分析,并与理论计算进行对比,说明理论计算的正确性。
[Abstract]:Automatic unloading of curved rail is a commonly used unloading mode of mine skip. When skip uses this unloading mode, the rest time of the lifting system is shortened, the working efficiency of mine is improved, and the cost of installation and operation and maintenance of the system is also relatively low.It is very popular in the coal industry.When the high-tonnage skip uses the mode of automatic unloading of the curved rail, the opening force of the required gate increases and the force on the curved rail increases exponentially, and the force on the curved rail is very uneven, which results in excessive wear and tear of the unloading wheel and the curved rail.Thus causes the security hidden danger, brings the unnecessary loss to the enterprise.In this paper, taking the skip of 32t open sector gate as the research object and optimizing the curve shape of the curved rail, the deficiency of the existing unloading curved rail is analyzed, and the stress situation of the four kinds of unloading curved rail is studied and compared.Thus, the shape of the unloading curved rail is found, which is more suitable for the 32 t skip.The main contents of this paper are as follows: (1) firstly, the structural characteristics and working principle of the upper open sector gate skip are analyzed, and the problems that may occur in the unloading process of the skip are put forward, and then the force acting on the curved rail is calculated theoretically.Finally, to find out the factors that affect the load of curved rail, and finally to create the solid model of skip, aiming at the problems in the process of skip unloading, the paper studies the unloading curves of four kinds of curved rails by using theoretical knowledge and establishes its mathematical model.Through calculation, the angular velocity and angular acceleration curves of the gate opening when the skip is running in each kind of curved rail are obtained, and the ideal unloading curve is found through comparative analysis. (3) the solid models of each curved rail are created in the 3D modeling software, respectively.In the assembly module, each curved rail is assembled with the skip separately, and then the established skip and curved rail entity model is saved into the common format and imported into the simulation software.The stress diagram and velocity diagram and acceleration diagram of the unloading wheel are obtained by simulation. The correctness of the ideal unloading curved rail is verified. (4) the main wear forms of the unloading curved rail are analyzed.The contact fatigue strength of ideal unloading curved rail is checked to verify whether the rail meets the material strength requirement.The finite element analysis of unloading curved rail is carried out by using Abaqus software, and compared with the theoretical calculation, the correctness of the theoretical calculation is proved.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD531.1

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