發(fā)布時間：2018-11-15 11:41

【摘要】：采礦業(yè)是我國的經(jīng)濟(jì)領(lǐng)域中不可或缺的重要組成部分，而顎式破碎機(jī)在采礦業(yè)中發(fā)揮著至關(guān)重要的作用。但是，目前顎式破碎機(jī)存在著工作效率較低、耗能較高等問題。因此，為提高顎式破碎機(jī)的工作效率和降低能耗，顎式破碎機(jī)的設(shè)計研究非常有必要。 本文以復(fù)擺顎式破碎機(jī)為研究對象，對動顎板所受破碎力合力的變化規(guī)律進(jìn)行研究分析，求解出其解析方程，并將此應(yīng)用于破碎機(jī)破碎過程中的動力學(xué)分析；在對破碎機(jī)進(jìn)行動力學(xué)分析時，提出新的破碎機(jī)簡化模型，基于此模型對各構(gòu)件所受反力及平衡力矩進(jìn)行計算分析，將計算結(jié)果與基于傳統(tǒng)的四連桿簡化模型所求得的動力學(xué)參數(shù)進(jìn)行對比；最后，以整機(jī)中的機(jī)架為研究對象，運(yùn)用ABAQUS軟件，對機(jī)架進(jìn)行模態(tài)分析。 本論文研究的主要內(nèi)容如下： （1）根據(jù)顎式破碎機(jī)結(jié)構(gòu)及工作原理，對偏心裝置與動鄂之間的相互作用形式及破碎機(jī)工作狀態(tài)下動顎板所受破碎力合力周期性變化規(guī)律進(jìn)行研究，并基于此提出了破碎機(jī)計算分析模型。 （2）以顎式破碎機(jī)的各參數(shù)為基礎(chǔ)，對顎式破碎機(jī)進(jìn)行運(yùn)動學(xué)仿真及建模。運(yùn)用MATLAB仿真平臺對模型進(jìn)行求解，從而求出各構(gòu)件的角位移、角速度、角加速度及顎式破碎機(jī)任一點(diǎn)的位移、速度、加速度的運(yùn)動曲線，并對結(jié)果進(jìn)行分析。 （3）根據(jù)運(yùn)動學(xué)分析所得數(shù)據(jù)，基于破碎機(jī)新的簡化模型，對工作過程中的破碎機(jī)進(jìn)行動力學(xué)分析，求解出各構(gòu)件所受反力及平衡力矩，并與基于破碎機(jī)傳統(tǒng)四連桿簡化模型所求得的參數(shù)進(jìn)行對比分析；基于兩種簡化模型，對空載運(yùn)行狀態(tài)下的破碎機(jī)進(jìn)行動力學(xué)分析，求解出各構(gòu)件所受反力及平衡力矩，進(jìn)行對比分析。經(jīng)上述對比分析可知，傳統(tǒng)的四連桿簡化模型由于過多的簡化，，為破碎機(jī)動力學(xué)分析帶來較大的模型誤差。 （4）以機(jī)架為研究對象，借助ABAQUS有限元分析軟件的強(qiáng)大功能，對機(jī)架進(jìn)行模態(tài)分析，求出了各階固有頻率和相對振型。以此確定在顎式破碎機(jī)工作過程中，機(jī)架會產(chǎn)生共振。這為破碎機(jī)結(jié)構(gòu)優(yōu)化提供參考，也為選擇電動機(jī)參數(shù)提供了依據(jù)。
[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.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD451

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