大倾角振动给料机及配套衬板的研究
发布时间：2019-03-24 18:50
【摘要】：振动给料机是利用振动原理进行给料的设备,在采矿、冶金、机械制造、煤炭、化工、建材、粮食以及轻工等部门获得了广泛的应用,目前正朝着大型化、高效化和节能化方向发展。给料机倾角越大,给料量就越大,所以为了提高振动给料机的给料量,通常采用向下倾斜安装,但倾角一般在0°～10°范围内变化。目前对倾角大于10°的物料的运动尚无精确的描述。 对振动给料机上物料的运动理论进行了研究,建立了直线运动的运动学模型,通过分析滑行运动和抛掷运动状态下的特点,得到了物料理论输送速度的计算公式。 为了研究大倾角振动给料机上物料的运动学特点,本文根据自同步的原理专门设计了一套振动给料机。这套设备给料量大,角度调节方便,而且结构简单。 在大倾角振动给料机中,理论速度和实测速度差值很大,因此必须对大倾角振动时物料的速度公式进行修正。通过分析物料在大倾角振动给料机上的运动过程,选择了三种不同粒度的物料,设计了薄料层和厚料层两种料层,测试不同倾角时物料的输送速度,在大量实验的基础上拟合出了物料的速度影响系数曲线,使计算公式精确而简单。 大倾角振动时,采用小的激振力同样可以实现大的给料量。激振力减小,能耗降低,能够实现节能的目标。但是大倾角振动时增加了对衬板的磨损,应该合理选择衬板材料。 对中碳低合金钢、A3钢、高铬铸铁和2Cr13钢进行了低应力磨料磨损的试验,得到高铬铸铁耐磨性最好,其磨损主要是微观切削机理作用的结果；2Crl3钢的耐磨性没有高铬铸铁好,其磨损主要是微观切削和多次塑变机理作用的结果：中碳低合金钢的耐磨性仅次于2Crl3钢,主要是微观切削机理作用的结果；A3钢磨损特别严重,已无法抵抗大倾角振动时物料的低应力磨料磨损,是多次塑变机理和疲劳磨损机理共同作用的结果。
[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 掳to 10 掳. At present, there is no accurate description of the motion of the material with inclination greater than 10 掳. 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.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH237.1
本文编号：2446586
[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 掳to 10 掳. At present, there is no accurate description of the motion of the material with inclination greater than 10 掳. 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.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH237.1
【引证文献】
相关硕士学位论文 前1条
1 高华;锤柄堆焊对双金属复合锤头界面结合和耐磨性的影响[D];郑州大学;2012年
，本文编号：2446586
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