离心式豌豆胚皮分离机设计及分离机理分析

Design and separation mechanism on separator for pea embryo skin by centrifugation

设计一种离心式豌豆胚皮分离机,并分析其分离机理。胚皮混合物进入高速旋转的分离盘后,在摩擦力作用下随着分离盘做圆周运动,并克服摩擦力而向外抛出。由于豆胚和豆皮假密度的差异,假密度较大的豆胚抛出的距离较远落在外面的接皮筒内,而假密度较小的豆皮则落在里面的接皮筒内,因此改变接皮筒相对于分离盘的高度,即可改变豆胚中的含皮率和豆皮中的含胚率,以适应不同企业、不同豌豆品种对分离率的不同要求。对分离盘的分离机理进行详细分析与计算,建立绝对速度→v_a与分离盘角速度ω、分离盘出口半径r以及物料颗粒与分离盘间摩擦系数的数学模型,该模型可为离心式分离机的后续研发工作提供参考。

A centrifugal pea embryo skin separator was designed,and its separation mechanism was also analyzed.The embryo skin did the circular motion under the action of the friction force when it entered the high-speed rotating disk and was thrown out by overcoming the friction force.Due to the different apparent density between the bean embryo and skin,the larger apparent density of the bean embryo was throwninto the outside received barrel,and the smaller apparent density of the bean skin was fallen into the inside received barrel.So chang the height of the received barrel relative to the separation disc can alter the ratio of the bean embryo to the bean skin to adapt to the different enterprises requirements.This paper gave the detailed analysis and calculation of the seperator mechanism,and established the mathematical model of the absolute speed →v_a,angular velocityωand the exit radius r,.So it canprovide references for the subsequent development work.