Influence of Centrifugal Disc of Centrifugal Feeder on Breaking Rate

doi:10.13304/j.nykjdb.2021.0961

Abstract

Abstract:

In order to research the influence of research materials plate of centrifugal feeder on broken rate， through the motion analysis of feed particles in extractor plate， this paper determined the factors affected the broken rate. Feed particles cohere model was established using EDEM software， and the single factor experiment was conducted to get the influence of various factors on the breakage rate. According to the results of single factor three factors， three levels orthogonal experiment was designed， the secondary and parses the multivariate regression model was constructed and explained between floor breakage and feed throw materials plate number centrifugal plate angle floor， and then the structure parameters of centrifugal plate was optimized. The results showed that the impact rank on the breaking rate of feed was： curvature radius > floor number > floor tilt plate. The interaction between the number of floor and the radius of floor curvature had a significant effect on the coefficient of variation of distribution. The regression analysis and optimization showed that when the number of floor was 6， the inclination angle was 12.8°， the radius of floor curvature was 71.5 mm， the minimum value of breakage rate reached to 2.13%. The results of the verification test showed that the measured values were basically consistent with the theoretical values of the model. The research results provided a reference for the parameter optimization of the feeding plate of centrifugal feeding machine.

Key words: automatic feeders, centrifugal disc, factors, breaking rate, EDEM

摘要：

为研究离心式投饲机中抛料盘对饲料破碎率的影响，通过分析饲料颗粒在抛料盘上的运动，确定影响破碎率的因素。利用EDEM软件建立饲料颗粒黏结模型进行单因素试验，得到各个因素对破碎率的影响情况。根据单因素结果设计并进行三因素三水平正交试验，建立饲料破碎率与抛料盘肋板个数、抛料盘倾角、肋板曲率半径等因素之间的二次多元回归模型并解析，后对离心盘的结构参数进行优化。结果表明，各因素对饲料破碎率影响的大小顺序依次为：肋板曲率半径>肋板个数>抛料盘倾角。肋板个数与肋板曲率半径交互作用对破碎率的影响较为明显。经回归分析和优化可知，当肋板个数为6个、抛料盘倾角为12.8°、肋板曲率半径为71.5 mm时，破碎率达到最小值2.13%；验证结果表明，优化后的抛料盘使饲料破碎率平均降低38.8%。研究结果可以为离心式投饲机抛料盘的性能优化提供参考。

关键词: 投饲机, 抛料盘, 因素, 破碎率, EDEM

CLC Number:

S969.31

Lizhen ZHANG, Tan ZHU. Influence of Centrifugal Disc of Centrifugal Feeder on Breaking Rate[J]. Journal of Agricultural Science and Technology, 2023, 25(6): 107-116.

张丽珍, 朱倓. 离心式投饲机抛料盘对饲料破碎率的影响[J]. 中国农业科技导报, 2023, 25(6): 107-116.

Figures/Tables 15

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参数名称Parameter	数值Value
饲料密度Feed density/（kg·m^-3）	700
泊松比Poisson’s ratio	0.3
剪切模量Shear modulus/Pa	3.5×10⁷
饲料-饲料碰撞恢复系数 Feed-feed collision recovery coefficient	0.340
饲料-饲料静摩擦系数 Feed-feed static friction coefficient	0.163
饲料-饲料动摩擦系数 Feed-feed dynamic friction coefficient	0.035
饲料-抛料盘碰撞恢复系数 Feed-disc collision recovery coefficient	0.175
饲料-抛料盘静摩擦系数 Feed-disc static friction coefficient	0.353
饲料-抛料盘动摩擦系数 Feed-disc dynamic friction coefficient	0.125

参数名称Parameter	数值Value
饲料密度Feed density/（kg·m^-3）	700
泊松比Poisson’s ratio	0.3
剪切模量Shear modulus/Pa	3.5×10⁷
饲料-饲料碰撞恢复系数 Feed-feed collision recovery coefficient	0.340
饲料-饲料静摩擦系数 Feed-feed static friction coefficient	0.163
饲料-饲料动摩擦系数 Feed-feed dynamic friction coefficient	0.035
饲料-抛料盘碰撞恢复系数 Feed-disc collision recovery coefficient	0.175
饲料-抛料盘静摩擦系数 Feed-disc static friction coefficient	0.353
饲料-抛料盘动摩擦系数 Feed-disc dynamic friction coefficient	0.125

水平 Level	因素Factor
水平 Level	A：盘倾角 Tilt angle of disc/（°）	B：肋板个数 Number of ribs	C：曲率半径 Radius of curvature/mm
-1	10	4	60
0	15	5	70
1	20	6	80

水平 Level	因素Factor
水平 Level	A：盘倾角 Tilt angle of disc/（°）	B：肋板个数 Number of ribs	C：曲率半径 Radius of curvature/mm
-1	10	4	60
0	15	5	70
1	20	6	80

序号 Number	因素Factor			破碎率 Breakage rate/%
序号 Number	盘倾角 Tilt angle of disc/（°）	肋板个数 Number of ribs	曲率半径 Radius of curvature/mm	破碎率 Breakage rate/%
1	20	4	70	2.76
2	15	6	70	2.24
3	15	6	70	2.25
4	15	6	70	2.29
5	10	6	60	3.73