振動給料機偏心振動下物料顆粒運動分析與糾偏研究
發(fā)布時間：2018-08-05 13:49
【摘要】：在轉(zhuǎn)底爐直接還原工藝中,爐膛上含碳球團(tuán)的厚度和分布效果對海綿鐵的品質(zhì)和生產(chǎn)效率有直接的影響。國內(nèi)外學(xué)者通過研究,設(shè)計出了一類新型的振動給料機,可實現(xiàn)爐膛周向和徑向上的等厚度布料。但由于振動給料機存在偏心,爐膛上的料層會出現(xiàn)厚度不均勻現(xiàn)象,達(dá)不到工藝要求。有鑒于此,本文以振動給料機為研究對象,對偏心造成的布料不均勻問題進(jìn)行了系統(tǒng)的研究,從偏心狀態(tài)下振動給料機的振動及物料顆粒運動特性兩方面探究這一現(xiàn)象產(chǎn)生的機理,并尋找解決方案。 在深入分析振動給料機的結(jié)構(gòu)、原理及振動特性的基礎(chǔ)上,將質(zhì)心與激振力作用線不重合的現(xiàn)象定義為偏心,建立了振動給料機的五自由度振動模型,通過振型疊加法求解出了不同偏心狀態(tài)下的穩(wěn)態(tài)響應(yīng)；并利用MATLAB進(jìn)行數(shù)值計算,得到偏心與穩(wěn)態(tài)振動幅值的關(guān)系曲線,分析了偏心對振動給料機穩(wěn)態(tài)振動特性的影響。 推導(dǎo)了直線振動條件下振動給料機中物料顆粒的運動理論,以此為基礎(chǔ),建立了一種適合于球團(tuán)顆粒運動仿真的摩擦力模型；并通過FORTRAN77編寫用戶子程序?qū)⑵淝度氲紸DAMS中,對復(fù)雜振動條件下球團(tuán)顆粒的運動進(jìn)行了仿真,分析了偏心引起的振動變化對振動給料機中物料顆粒運動的影響。 結(jié)合振動給料機的偏心振動特性及球團(tuán)顆粒運動規(guī)律,分析了偏心對布料效果的影響,闡釋了偏心造成振動給料機布料不均勻現(xiàn)象的內(nèi)在機理；進(jìn)而對偏心狀態(tài)下的振動給料機進(jìn)行多球團(tuán)顆粒運動仿真,找到了偏心與振動臺面上球團(tuán)顆粒的分布狀況之間的聯(lián)系；以此為基礎(chǔ),提出了兩種糾偏方案,并通過布料試驗進(jìn)行了驗證。 結(jié)果表明,水平方向上的偏心是造成振動給料機布料不均勻現(xiàn)象的根本原因；糾偏后,振動給料機的布料效果得到明顯改善,證明了理論分析的正確性。
[Abstract]:In the direct reduction process of rotary bottom furnace, the thickness and distribution of carbon-bearing pellets on the furnace have a direct effect on the quality and production efficiency of sponge iron. A new type of vibrating feeder has been designed by scholars at home and abroad, which can realize the distribution of equal thickness in the circumference and radial direction of the furnace. However, due to the eccentricity of vibrating feeder, the thickness of the material layer on the furnace will be uneven, which can not meet the requirements of the process. In view of this, this paper takes the vibrating feeder as the research object, and makes a systematic study on the uneven distribution caused by eccentricity. In this paper, the mechanism of this phenomenon is explored from the vibration of the vibrating feeder under eccentric condition and the motion characteristics of the material particles, and the solution is found. Based on the deep analysis of the structure, principle and vibration characteristics of the vibrating feeder, the phenomenon that the action line between the center of mass and the exciting force does not coincide is defined as eccentricity, and the vibration model of the vibration feeder with five degrees of freedom is established. The steady state response in different eccentricity states is solved by mode superposition method, and the relation curve between eccentricity and steady vibration amplitude is obtained by using MATLAB, and the influence of eccentricity on steady state vibration characteristic of vibrating feeder is analyzed. In this paper, the motion theory of material particles in vibrating feeder under linear vibration is derived. Based on this theory, a friction force model suitable for pellet motion simulation is established, and embedded in ADAMS by user subprogram written by FORTRAN77. The movement of pellets under complex vibration conditions is simulated and the effect of eccentricity on the movement of particles in vibrating feeder is analyzed. Combined with the eccentric vibration characteristics of vibrating feeder and the movement law of pellets, the influence of eccentricity on the distribution effect is analyzed, and the internal mechanism of uneven distribution caused by eccentricity is explained. Then, the motion simulation of multi-pellet particles is carried out on the vibrating feeder in eccentric state, and the relation between eccentricity and the distribution of pellet particles on the vibrating table is found, and two kinds of rectifying schemes are put forward. It is verified by cloth test. The results show that the eccentricity in the horizontal direction is the fundamental cause of the uneven distribution of the vibrating feeder, and the distribution effect of the vibrating feeder is obviously improved after rectifying the deviation, which proves the correctness of the theoretical analysis.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TH237.1
本文編號：2165985
[Abstract]:In the direct reduction process of rotary bottom furnace, the thickness and distribution of carbon-bearing pellets on the furnace have a direct effect on the quality and production efficiency of sponge iron. A new type of vibrating feeder has been designed by scholars at home and abroad, which can realize the distribution of equal thickness in the circumference and radial direction of the furnace. However, due to the eccentricity of vibrating feeder, the thickness of the material layer on the furnace will be uneven, which can not meet the requirements of the process. In view of this, this paper takes the vibrating feeder as the research object, and makes a systematic study on the uneven distribution caused by eccentricity. In this paper, the mechanism of this phenomenon is explored from the vibration of the vibrating feeder under eccentric condition and the motion characteristics of the material particles, and the solution is found. Based on the deep analysis of the structure, principle and vibration characteristics of the vibrating feeder, the phenomenon that the action line between the center of mass and the exciting force does not coincide is defined as eccentricity, and the vibration model of the vibration feeder with five degrees of freedom is established. The steady state response in different eccentricity states is solved by mode superposition method, and the relation curve between eccentricity and steady vibration amplitude is obtained by using MATLAB, and the influence of eccentricity on steady state vibration characteristic of vibrating feeder is analyzed. In this paper, the motion theory of material particles in vibrating feeder under linear vibration is derived. Based on this theory, a friction force model suitable for pellet motion simulation is established, and embedded in ADAMS by user subprogram written by FORTRAN77. The movement of pellets under complex vibration conditions is simulated and the effect of eccentricity on the movement of particles in vibrating feeder is analyzed. Combined with the eccentric vibration characteristics of vibrating feeder and the movement law of pellets, the influence of eccentricity on the distribution effect is analyzed, and the internal mechanism of uneven distribution caused by eccentricity is explained. Then, the motion simulation of multi-pellet particles is carried out on the vibrating feeder in eccentric state, and the relation between eccentricity and the distribution of pellet particles on the vibrating table is found, and two kinds of rectifying schemes are put forward. It is verified by cloth test. The results show that the eccentricity in the horizontal direction is the fundamental cause of the uneven distribution of the vibrating feeder, and the distribution effect of the vibrating feeder is obviously improved after rectifying the deviation, which proves the correctness of the theoretical analysis.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TH237.1
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 安雪斌;潘尚峰;;多體系統(tǒng)動力學(xué)仿真中的接觸碰撞模型分析[J];計算機仿真;2008年10期
2 何筑生;盛振東;;低噪聲調(diào)速型電機振動給料機工作機理[J];礦山機械;1984年02期
3 夏圣伯,范朝陽;BZS1665棒條振動給料機的設(shè)計及與幾種機型的比較[J];礦山機械;2005年02期
4 孫欣;尹忠俊;;徑向等厚振動給料機動態(tài)性能分析與優(yōu)化[J];礦山機械;2008年03期
5 高文星;董凌燕;陳登福;溫良英;;煤基直接還原及轉(zhuǎn)底爐工藝的發(fā)展現(xiàn)狀[J];礦冶;2008年02期
6 彭世德;單電機振動給料機的動力學(xué)分析[J];遼寧建材;1994年04期
7 鐘文彬;;圓柱螺旋彈簧剛度特性的有限元分析[J];機械;2011年12期
8 閆磊朋;洪曉華;黃銀川;周洲;;慣性振動給料機空載實驗研究[J];煤礦機械;2008年01期
9 楊春范;xjG型慣性共振式振動給料機研制簡介[J];煤礦設(shè)計;1991年12期
10 吳豪永;張宏軍;于德杰;劉井旭;張玉欣;;JDG型甲帶給料機的應(yīng)用[J];煤礦現(xiàn)代化;2006年05期
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