大型反共振振动筛的设计与研究

发布时间：2018-05-03 14:24

本文选题：反共振 + 振动筛　；参考：《东北大学》2011年硕士论文

【摘要】：振动机械在国民经济的许多领域如采矿、冶金等部门得到了广泛的应用,随着我国经济发展方向朝向节能低碳方向的发展,一些传统的高耗能的振动机械急需得到改进。反共振振动机械由于其自身存在寿命高、低耗能、噪声小等优点,越来越受到人们的重视。本文利用反共振振动理论设计一种大型的反共振振动筛分机械用于生产实践。反共振振动机分为原点反共振和跨点反共振,其中跨点反共振有两种结构形式,本文选用原点反共振振动机结构形式进行振动筛的设计。对隔振系统的板弹簧和圆柱螺旋弹簧分别设计并校核。根据传统振动筛的结构特征,利用PRO/E软件对反共振振动筛进行三维设计,设计振动筛的筛箱结构方案,并同时设计两种反共振体结构方案,对反共振体方案一和反共振体方案二进行比较分析。对激振器进行装配设计,同时对方案一和方案二整体结构进行装配设计,计算各个部分的质量,检查模型是否存在干涉。三维设计完成之后,利用有限元方法对振动筛进行分析仿真,分别对筛箱进行模态分析得到刚度情况和静力分析得到结构的强度情况,检验实际强度和刚度是否满足工作要求,对筛箱结构进行改进加强。然后分别对反共振体方案一和反共振体方案二进行模态分析和静力分析,从强度和刚度情况考虑选择合适的反共振体结构方案,并对不合理结构进行改进。最终确定整个结构方案,对整体结构方案进行静力分析。对振动筛整体结构进行谐响应分析,从而预测反共振状态下的反共振点位置；设计振动筛的瞬态动力学分析方法,进行简谐力作用下的振动筛的瞬态分析,得到振动筛在动态情况下节点的应力情况。对所设计振动筛进行工作性能预测,利用MATLAB软件对振动筛的影响进行仿真分析,包括物料变化对反共振点稳定性的影响和激振力不通过质心对振动筛工作的影响,得出振动筛在设计过程中对振动筛工作性能影响的因素及其影响规律。
[Abstract]:Vibration machinery has been widely used in many fields of the national economy, such as mining, metallurgy and so on. With the development of economy in our country towards the direction of energy saving and low carbon, some traditional vibration machinery with high energy consumption are in urgent need of improvement. Antiresonance vibration machinery has been paid more and more attention because of its long life, low energy consumption and low noise. In this paper, a large anti-resonance vibrating screen separation machine is designed by using anti-resonance vibration theory. Anti-resonance vibration machine is divided into origin antiresonance and cross-point antiresonance. There are two structural forms of cross-point antiresonance. In this paper, the structural form of origin antiresonance vibration machine is selected to design the vibrating screen. The plate spring and cylindrical helical spring of vibration isolation system are designed and checked separately. According to the structural characteristics of the traditional vibrating screen, the three-dimensional design of the anti-resonance vibrating screen is carried out by using PRO/E software, and the structural scheme of the screen box is designed, and two kinds of anti-resonance structure schemes are designed at the same time. The antiresonance scheme 1 and 2 are compared and analyzed. At the same time, the whole structure of scheme 1 and scheme 2 are designed, the quality of each part is calculated, and the interference of the model is checked. After the 3D design is finished, the vibration screen is analyzed and simulated by the finite element method. The stiffness of the screen box is obtained by modal analysis and the strength of the structure is obtained by static analysis, and the actual strength and stiffness are checked whether the actual strength and stiffness meet the working requirements. The structure of the screen box is improved and strengthened. Then the modal analysis and static analysis of antiresonance scheme 1 and antiresonance scheme 2 are carried out respectively. The appropriate antiresonance structure scheme is selected according to the strength and stiffness and the unreasonable structure is improved. Finally, the whole structure scheme is determined, and the static analysis of the whole structure scheme is carried out. The harmonic response of the whole structure of the vibrating screen is analyzed to predict the position of the antiresonance point, the transient dynamic analysis method of the vibrating screen is designed, and the transient analysis of the vibrating screen under the simple harmonic force is carried out. The stress of the joint of the vibrating screen under the dynamic condition is obtained. The working performance of the designed vibrating screen is predicted, and the influence of the material change on the stability of the anti-resonance point is simulated by using MATLAB software, and the effect of the exciting force on the work of the vibrating screen is not through the centroid of mass. The factors that affect the working performance of vibrating screen in the design process and its influence law are obtained.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH237.6

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