【摘要】：振動給料機是利用振動原理進行給料的設(shè)備,在采礦、冶金、機械制造、煤炭、化工、建材、糧食以及輕工等部門獲得了廣泛的應(yīng)用,目前正朝著大型化、高效化和節(jié)能化方向發(fā)展。給料機傾角越大,給料量就越大,所以為了提高振動給料機的給料量,通常采用向下傾斜安裝,但傾角一般在0°～10°范圍內(nèi)變化。目前對傾角大于10°的物料的運動尚無精確的描述。 對振動給料機上物料的運動理論進行了研究,建立了直線運動的運動學模型,通過分析滑行運動和拋擲運動狀態(tài)下的特點,得到了物料理論輸送速度的計算公式。 為了研究大傾角振動給料機上物料的運動學特點,本文根據(jù)自同步的原理專門設(shè)計了一套振動給料機。這套設(shè)備給料量大,角度調(diào)節(jié)方便,而且結(jié)構(gòu)簡單。 在大傾角振動給料機中,理論速度和實測速度差值很大,因此必須對大傾角振動時物料的速度公式進行修正。通過分析物料在大傾角振動給料機上的運動過程,選擇了三種不同粒度的物料,設(shè)計了薄料層和厚料層兩種料層,測試不同傾角時物料的輸送速度,在大量實驗的基礎(chǔ)上擬合出了物料的速度影響系數(shù)曲線,使計算公式精確而簡單。 大傾角振動時,采用小的激振力同樣可以實現(xiàn)大的給料量。激振力減小,能耗降低,能夠?qū)崿F(xiàn)節(jié)能的目標。但是大傾角振動時增加了對襯板的磨損,應(yīng)該合理選擇襯板材料。 對中碳低合金鋼、A3鋼、高鉻鑄鐵和2Cr13鋼進行了低應(yīng)力磨料磨損的試驗,得到高鉻鑄鐵耐磨性最好,其磨損主要是微觀切削機理作用的結(jié)果；2Crl3鋼的耐磨性沒有高鉻鑄鐵好,其磨損主要是微觀切削和多次塑變機理作用的結(jié)果：中碳低合金鋼的耐磨性僅次于2Crl3鋼,主要是微觀切削機理作用的結(jié)果；A3鋼磨損特別嚴重,已無法抵抗大傾角振動時物料的低應(yīng)力磨料磨損,是多次塑變機理和疲勞磨損機理共同作用的結(jié)果。
[Abstract]:Vibration feeder is a kind of equipment which uses vibration principle to feed material. It has been widely used in mining, metallurgy, machinery manufacture, coal, chemical industry, building materials, grain and light industry. Efficient and energy-efficient development. The larger the inclination angle of the feeder is, the larger the feed quantity is. Therefore, in order to improve the feed quantity of the vibrating feeder, the downward tilt installation is usually adopted, but the inclination angle generally varies from 0 擄to 10 擄. At present, there is no accurate description of the motion of the material with inclination greater than 10 擄. The motion theory of material on vibrating feeder is studied, and the kinematic model of linear motion is established. By analyzing the characteristics of sliding motion and throwing motion, the formula for calculating the theoretical conveying speed of material is obtained. In order to study the kinematic characteristics of the material on the large angle vibrating feeder, a set of vibrating feeder is specially designed according to the principle of self-synchronization. This set of equipment feed volume is large, angle adjustment is convenient, and the structure is simple. There is a great difference between the theoretical velocity and the measured velocity in the large inclination vibration feeder, so it is necessary to revise the velocity formula of the material during the large inclination vibration. By analyzing the moving process of material on the vibrating feeder with large inclination angle, three kinds of materials with different particle sizes were selected, and two kinds of material layers, thin layer and thick layer, were designed to test the conveying speed of the material at different inclination angles. On the basis of a large number of experiments, the curve of velocity influence coefficient of material is fitted, which makes the calculation formula accurate and simple. When vibration with large inclination angle, small excitation force can also be used to achieve a large amount of feed. With the reduction of excitation force and energy consumption, the goal of energy saving can be achieved. However, when vibration with large inclination angle increases the wear of lining plate, the liner material should be selected reasonably. The low stress abrasive wear tests of medium carbon low alloy steel, A3 steel, high chromium cast iron and 2Cr13 steel have been carried out. The results show that the wear resistance of high chromium cast iron is the best, and the wear is mainly the result of micro cutting mechanism. The wear resistance of 2Crl3 steel is not as good as that of high chromium cast iron, and its wear is mainly caused by micro-cutting and multi-plastic mechanism. The wear resistance of medium carbon low alloy steel is second only to that of 2Crl3 steel, which is mainly the result of micro-cutting mechanism. The wear of A3 steel is very serious and can not resist the low stress abrasive wear when the material is subjected to large inclination vibration. It is the result of multiple plastic deformation mechanism and fatigue wear mechanism.
【學位授予單位】：鄭州大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH237.1

【引證文獻】

相關(guān)碩士學位論文 前1條

1 高華;錘柄堆焊對雙金屬復合錘頭界面結(jié)合和耐磨性的影響[D];鄭州大學;2012年

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本文編號：2446586