A novel prototype of a modified centrifugal sheller was evaluated in terms of undamaged kernels, damaged kernels, fragments of kernels and unbroken nuts. Trials were carried out with walnut varieties ‘Elit’, ‘Franquette’ and ‘G-139’. First, morphological characteristics (fruit height, width, thickness), relative moisture content and walnut shell strength was measured on randomly selected samples. The maximum force was measured at constant weight of dried nuts perpendicular to the longitudinal axis in ‘Elit’ (287.38 ±107.09 N) followed by ‘Franquette’ (223.36 ±101.00 N) and ‘G-139’ (98.08 ±30.76 N). Shelling walnuts with the centrifugal sheller resulted best output in ‘Franquette’ with 78.05% of whole undamaged kernels, 8.76% of damaged kernels and 7.15% of fragments, while 6.05% remains unbroken; ‘Elit’ only 76.42% of whole kernels, 10.02% of damaged kernels, 9.48% of fragments and 4.08% unbroken nuts. ‘G-139’ gave significantly poorer quality with 60.05% of whole kernels, 21.43% of damaged kernels and 13.63% of fragments and 4.89% unbroken nuts. The output of whole kernels yielded by modified centrifugal sheller is in significant correlation with the walnut thickness of particular variety.

中文翻译：

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改良离心剥壳机对核桃种仁品质的比较

根据未损坏的果仁，损坏的果仁，果仁碎片和未破坏的坚果，对改良型离心脱壳机的新型原型进行了评估。对核桃品种“ Elit”，“ Franquette”和“ G-139”进行了试验。首先，在随机选择的样品上测量形态特征（果实高度，宽度，厚度），相对水分含量和核桃壳强度。在“ Elit”（287.38±107.09 N）中垂直于纵轴的恒定重量的干螺母下测量最大力，然后是“ Franquette”（223.36±101.00 N）和“ G-139”（98.08±30.76 N）。用离心脱壳机对核桃进行脱壳处理在“弗兰克特”中的产量最高，占未损坏的全仁的78.05％，受损的仁占8.76％，碎片的7.15％，而未破碎的占6.05％。'Elit'仅占整个内核的76.42％，10。02％的受损颗粒，9.48％的碎片和4.08％完整的坚果。'G-139'的质量明显较差，完整仁的占60.05％，受损仁的占21.43％，碎片的13.63％和未破碎的坚果为4.89％。改良的离心脱壳机产生的全谷粒产量与特定品种的核桃厚度显着相关。