轧辊-轧板式银杏脱壳机的优化设计与试验

Optimized design and experiment of roller-crush board ginkgo huller

为解决轧辊-轧板挤压式银杏脱壳机破壳率低、破壳混合物不易分离的问题,改进了轧板结构,设计了撞击缓冲板,并采用了筛分、风扬相结合进行仁、壳分离,对影响脱壳效果的参数组合进行了四因素两水平正交试验。当轧辊材料选45#钢,轧板-轧辊间隙10mm,轧辊转速1000r/min时,将分级后的银杏置于50℃红外干燥箱内干燥4h后进行脱壳分离试验,脱壳率较改进前提高了近9%,可达到70%;破碎率降低至小于12%,壳中含仁率和仁中含壳率分别为10%和8%,取得较好的脱壳效果。

To overcome shortcomings of gingko hulling process of roller-crush board huller, low hulled rate, difficulty of crushed mixture, etc, structure of the huller was redesigned. The crush board was improved, two shocking board were put into the crushing facility, and crushed mixture of gingko were separated with wind raising sieve. After 4-factor-2-level orthogonal experiments had been accomplished, key parameter of the hushing equipment had been studied with the quantitative analysis. The result shows that, the cracked nut rate T increases by 9% over before, and can reach 70%. The smashed nut rate S is less than 12%, the rate of remained core in shell dropped to 10% and the rate of remained shell in core go to 8%, while the four key parameters （roller material, rolling interstice, rotate velocity and pre-treating） were adjusted to 45# steel, 10 mm, 1000 r/min and 4 hour under 50℃ infrared drying oven, respectively. A second generation of improved prototype of gingko huller would be implemented based on the experiments.