复摆颚式破碎机动力学及有限元分析

发布时间：2018-11-15 11:41

【摘要】：采矿业是我国的经济领域中不可或缺的重要组成部分，而颚式破碎机在采矿业中发挥着至关重要的作用。但是，目前颚式破碎机存在着工作效率较低、耗能较高等问题。因此，为提高颚式破碎机的工作效率和降低能耗，颚式破碎机的设计研究非常有必要。本文以复摆颚式破碎机为研究对象，对动颚板所受破碎力合力的变化规律进行研究分析，求解出其解析方程，并将此应用于破碎机破碎过程中的动力学分析；在对破碎机进行动力学分析时，提出新的破碎机简化模型，基于此模型对各构件所受反力及平衡力矩进行计算分析，将计算结果与基于传统的四连杆简化模型所求得的动力学参数进行对比；最后，以整机中的机架为研究对象，运用ABAQUS软件，对机架进行模态分析。本论文研究的主要内容如下：（1）根据颚式破碎机结构及工作原理，对偏心装置与动鄂之间的相互作用形式及破碎机工作状态下动颚板所受破碎力合力周期性变化规律进行研究，并基于此提出了破碎机计算分析模型。（2）以颚式破碎机的各参数为基础，对颚式破碎机进行运动学仿真及建模。运用MATLAB仿真平台对模型进行求解，从而求出各构件的角位移、角速度、角加速度及颚式破碎机任一点的位移、速度、加速度的运动曲线，并对结果进行分析。（3）根据运动学分析所得数据，基于破碎机新的简化模型，对工作过程中的破碎机进行动力学分析，求解出各构件所受反力及平衡力矩，并与基于破碎机传统四连杆简化模型所求得的参数进行对比分析；基于两种简化模型，对空载运行状态下的破碎机进行动力学分析，求解出各构件所受反力及平衡力矩，进行对比分析。经上述对比分析可知，传统的四连杆简化模型由于过多的简化，，为破碎机动力学分析带来较大的模型误差。（4）以机架为研究对象，借助ABAQUS有限元分析软件的强大功能，对机架进行模态分析，求出了各阶固有频率和相对振型。以此确定在颚式破碎机工作过程中，机架会产生共振。这为破碎机结构优化提供参考，也为选择电动机参数提供了依据。
[Abstract]:Mining industry is an indispensable part in the economic field of our country, and jaw crusher plays an important role in mining industry. However, the jaw crusher has some problems, such as low efficiency and high energy consumption. Therefore, in order to improve the efficiency of jaw crusher and reduce energy consumption, the design of jaw crusher is very necessary. This paper takes the compound pendulum jaw crusher as the research object, studies and analyzes the changing law of the force of crushing force on the moving jaw plate, solves its analytic equation, and applies it to the dynamic analysis of the crushing process of the crusher. In the dynamic analysis of crusher, a new simplified model of crusher is put forward. Based on this model, the reaction force and balance moment of each member are calculated and analyzed. The results are compared with the dynamic parameters obtained from the simplified four-bar model. Finally, taking the frame of the whole machine as the research object, using ABAQUS software, the modal analysis of the frame is carried out. The main contents of this thesis are as follows: (1) according to the structure and working principle of jaw crusher, The form of interaction between eccentric device and moving Hubei and the periodical variation law of breaking force under the working condition of crusher are studied. Based on this, a calculating and analyzing model of crusher is put forward. (2) based on the parameters of jaw crusher, kinematics simulation and modeling of jaw crusher are carried out. The MATLAB simulation platform is used to solve the model, and the angular displacement, angular velocity, angular acceleration and the movement curves of any point of the jaw crusher are obtained, and the results are analyzed. (3) according to the data of kinematics analysis, based on the new simplified model of crusher, the dynamic analysis of crusher in the working process is carried out, and the reaction force and equilibrium moment of each component are solved. Compared with the traditional four-bar simplified model of crusher, the parameters obtained are compared and analyzed. Based on two simplified models, the dynamic analysis of the crusher under no-load operation is carried out, and the reaction force and the balance moment of each component are calculated and compared. Through the comparison and analysis above, it can be seen that the traditional four-bar simplified model brings a large model error for the dynamic analysis of the crusher because of too many simplifications. (4) taking the frame as the research object, the modal analysis of the frame is carried out with the help of the powerful function of ABAQUS finite element analysis software, and the natural frequencies and relative modes of each order are obtained. In this way, it is determined that in the working process of jaw crusher, the rack will produce resonance. This provides a reference for the structural optimization of the crusher, and also provides a basis for selecting the parameters of the motor.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD451

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