挤压式杏核破壳机试验研究

针对当前杏核破壳生产率低、碎仁率高的问题,设计一种杏核破壳机,对其结构及杏核破壳受力情况进行介绍。以明星杏杏核为试验材料,选取喂料速度、破壳间隙、主动辊转速3个因素对杏核破壳进行正交试验分析。结果表明:破壳间隙对破壳效果的影响极显著,喂料速度、主动辊转速对破壳效果影响不显著;当喂料速度400kg/h、破壳间隙在9mm、主动辊转速400r/min时,破壳率为99.65%,整仁率为96.87%,破壳效果最好。相同喂料速度与主动辊转速条件下,其他品种杏核的破壳试验,验证表明当破壳间隙小于杏核厚度约2 mm时,破壳率在98%以上,整仁率在95%以上。

Experimental study on Apricot stone extrusion breaking machine

In this paper, a pricot stone breaking machine was designed to solve the current problem of low productivity and high rate of broken kernels in apricot stone breaking processing. The structure and stress situation of the machine had been analyzed. Various related factors were analyzed, and three primary factors including feeding speed, interspace of breaking device and rotating speed of active roll were focused on. Moreover, these three factors were selected for orthogonal experiments, using the Star apricot stone as material. The results showed that the clearance of breaking device had a significant effect on stone breaking efficiency, while the speeds of feeding and rotating of active roll were no obvious influance. The breaking rate and entire kernel rate of the material reached to 99.65% and 96.87%, respectively, when the feeding speed was 400 kg/h, and the rotating speed of active roll was 400 r/min, using the 9 mm interspace of breaking device. This breaking effect was better than those in the other cases. Furthermore, other kinds of apricot stones were tested using this mechain at the same feeding and rotating speeds, leaving the interspaces of breaking device at 2 mm less than the thickness apricot stone, and it was found that their breaking and kernel rates could be up to more than 98% and 95%, repectively.