液压泥炮连杆机构断裂问题的分析与研究

发布时间：2018-04-19 10:16

本文选题：液压泥炮 + 连杆机构　；参考：《华北理工大学》2017年硕士论文

【摘要】：泥炮是高炉必备的重要设备之一,其主要作用是在高炉出铁结束后迅速准确堵塞出铁口,保证高炉能够顺利进入到下一个冶炼循环。泥炮一旦出现故障,不能正常堵口,必将导致高炉停产,甚至造成重大安全事故。所以泥炮的工作质量和使用寿命直接关系到企业的安全生产和经济利益。运用机械原理连杆机构运动分析的相关理论,对液压泥炮连杆机构进行运动学分析,获得液压泥炮工作过程中关键点的速度曲线及加速度曲线,通过运动曲线的相关数据分析与使用经验选择0米、0.7米、1.2米三个位置作为连杆机构有限元分析的参考位置;运用Solidworks软件建立液压泥炮构件模型并完成装配,将模型导入ANSYS Workbench后进行前期的接触关系与材质设置;在三个典型位置分别运用软件的瞬态结构分析模块(transient structural)对液压泥炮关键部件进行运动仿真,获得冲击过程中应力分布云图。结果显示在液压缸杆的冲击载荷作用下,三连杆在1.2米位置时的最大应力远远超出材料的屈服强度,存在断裂危险,二连杆在常规位置时最大应力接近材料的屈服强度,存在安全隐患。为了提高机构的可靠性,从材料和结构方面对二连杆和三连杆提出了改进建议。对改进后的连杆机构重新建模并使用软件进行验证,改进后的连杆机构可以满足冲击过程中的强度要求。
[Abstract]:Mud gun is one of the most important equipment in blast furnace. Its main function is to block the iron outlet quickly and accurately after the blast furnace is finished, so as to ensure that the blast furnace can enter the next smelting cycle smoothly.Once the mud gun fails, it will lead to the shutdown of the blast furnace and even the serious safety accident.Therefore, the working quality and service life of clay gun are directly related to the safety of production and economic interests of enterprises.In this paper, the kinematics analysis of the linkage mechanism of hydraulic mud gun is carried out by using the relevant theory of kinematic analysis of the linkage mechanism of the mechanical principle, and the velocity and acceleration curves of the key points in the working process of the hydraulic mud gun are obtained.Through the analysis of the relevant data of the motion curve and the experience in use, three positions of 0 m 0. 7 m and 1. 2 m are selected as the reference position for the finite element analysis of the connecting rod mechanism, and the component model of the hydraulic mud gun is established by using Solidworks software and the assembly is completed.After the model is imported into ANSYS Workbench, the initial contact relation and material setting are carried out, and the transient structural analysis module of the software is used to simulate the motion of the key parts of the hydraulic mud gun in three typical locations, and the stress distribution cloud diagram during the impact process is obtained.The results show that under the impact load of the hydraulic cylinder rod, the maximum stress of the three-bar at the position of 1.2 meters far exceeds the yield strength of the material, and there is a risk of fracture. The maximum stress of the two-bar in the conventional position is close to the yield strength of the material.There are hidden dangers to safety.In order to improve the reliability of the mechanism, suggestions for improving the material and structure of the two and three linkages are put forward.The improved linkage mechanism is remodeled and verified by software. The improved linkage mechanism can meet the strength requirements during the impact process.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TF321;TH112

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