本文選題：反共振 + 振動篩�。� 參考：《東北大學(xué)》2011年碩士論文

【摘要】：振動機械在國民經(jīng)濟的許多領(lǐng)域如采礦、冶金等部門得到了廣泛的應(yīng)用,隨著我國經(jīng)濟發(fā)展方向朝向節(jié)能低碳方向的發(fā)展,一些傳統(tǒng)的高耗能的振動機械急需得到改進。反共振振動機械由于其自身存在壽命高、低耗能、噪聲小等優(yōu)點,越來越受到人們的重視。本文利用反共振振動理論設(shè)計一種大型的反共振振動篩分機械用于生產(chǎn)實踐。 反共振振動機分為原點反共振和跨點反共振,其中跨點反共振有兩種結(jié)構(gòu)形式,本文選用原點反共振振動機結(jié)構(gòu)形式進行振動篩的設(shè)計。對隔振系統(tǒng)的板彈簧和圓柱螺旋彈簧分別設(shè)計并校核。 根據(jù)傳統(tǒng)振動篩的結(jié)構(gòu)特征,利用PRO/E軟件對反共振振動篩進行三維設(shè)計,設(shè)計振動篩的篩箱結(jié)構(gòu)方案,并同時設(shè)計兩種反共振體結(jié)構(gòu)方案,對反共振體方案一和反共振體方案二進行比較分析。對激振器進行裝配設(shè)計,同時對方案一和方案二整體結(jié)構(gòu)進行裝配設(shè)計,計算各個部分的質(zhì)量,檢查模型是否存在干涉。 三維設(shè)計完成之后,利用有限元方法對振動篩進行分析仿真,分別對篩箱進行模態(tài)分析得到剛度情況和靜力分析得到結(jié)構(gòu)的強度情況,檢驗實際強度和剛度是否滿足工作要求,對篩箱結(jié)構(gòu)進行改進加強。然后分別對反共振體方案一和反共振體方案二進行模態(tài)分析和靜力分析,從強度和剛度情況考慮選擇合適的反共振體結(jié)構(gòu)方案,并對不合理結(jié)構(gòu)進行改進。最終確定整個結(jié)構(gòu)方案,對整體結(jié)構(gòu)方案進行靜力分析。對振動篩整體結(jié)構(gòu)進行諧響應(yīng)分析,從而預(yù)測反共振狀態(tài)下的反共振點位置；設(shè)計振動篩的瞬態(tài)動力學(xué)分析方法,進行簡諧力作用下的振動篩的瞬態(tài)分析,得到振動篩在動態(tài)情況下節(jié)點的應(yīng)力情況。 對所設(shè)計振動篩進行工作性能預(yù)測,利用MATLAB軟件對振動篩的影響進行仿真分析,包括物料變化對反共振點穩(wěn)定性的影響和激振力不通過質(zhì)心對振動篩工作的影響,得出振動篩在設(shè)計過程中對振動篩工作性能影響的因素及其影響規(guī)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.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH237.6

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