国家特色蔬菜产业技术体系专项（CARS -24）; 湖北省自然科学基金项目(2018CFB343)
针对荸荠（Eleocharis dulcis (Burm. f.) Trin. ）外形不规则以及去皮损失大、去不净的问题，采用平刀去顶芽、斜刀去底部、圆弧刀去侧皮的组合切削方式，设计1种荸荠去皮机。通过对荸荠外形参数的测量与建模，拟合得到荸荠外轮廓曲线，确定刀具的结构参数范围。基于3D打印技术，采用单因素试验，确定了切削速度、底面斜刀倾角与长度、侧面圆弧刀弦长对去皮损失率与去净率的影响，优化得到了适宜的结构参数与运动参数，在转速为40 r/min、底面斜刀倾角为82°、底面斜刀长度为14 mm、侧面圆弧刀弦长为22 mm（直径42.75 mm）的条件下，去净率达到93%，损失率为24.4%，显著高于人工去皮与机械摩擦去皮。
A kind of water chestnut （Eleocharis dulcis (Burm. f.) Trin. ） peeler using the combined cutting method of flat blade to remove top bud,inclined blade to remove bottom,and arc blade to remove lateral peel was designed to solve the problems of the irregular shape,large peeling loss and uncleanness of water chestnut. By measuring and modeling the shape parameters of water chestnut,the outer contour curve of water chestnut was fitted to determine the range of structural parameters of blades. Based on 3D printing technology,the single factor experiment was used to determine the effects of rotary speed,inclination angle and length of the inclined blade,and chord length of the arc blade on loss rate and removal rate of water chestnut. The structural parameters and motion parameters were optimized. The results showed that the removal rate and the loss rate of the peeler designed was 93% and 24.4% when the rotary speed was 40 r/min,the inclination angle and length of the inclined blade were 82° and 14 mm,and chord length of the arc blade was 22 mm(42.75 mm in diameter),significantly higher than that of manual peeling and mechanical friction peeling.