Abstract: Aiming at the problems of incomplete cleaning, low classification accuracy, high damage rate, and slow efficiency of Ruditapes philippinarum after capture ashore, an integrated cleaning and classification machine for Ruditapes philippinarum is designed in this paper. Combined with the morphological characteristics of Ruditapes philippinarum, by analyzing the movement of Ruditapes philippinarum in the screen barrel and between the brush roller, the classification mode of brush roller combined with high spray and drum screening is determined, and the design of drum screen, high-pressure spray, and brush roller is completed. The simulation analysis of the operation parameters of the integrated cleaning and classification machine is carried out by using EDEM discrete element simulation. The simulation results show that when the speed of the brush roller is 3 r/min, the speed of the drum screen is 15 r/min and the inclination angle of the drum screen is 3 °, the classification accuracy is 91%, and the prototype manufacturing and power device matching are completed. Under the above parameters, the classification accuracy can reach 91%, the damage rate of the Ruditapes philippinarum is about 1%-2%, and the sediment attached to the shell is cleanly washed. The integrated operation of the cleaning and grading machine for Ruditapes philippinarum with high efficiency and low loss is realized.

Key words: Ruditapes philippinarum, roller screen, high pressure spray, cleaning classification, discrete element method

摘要： 针对捕捞后菲律宾蛤仔清洗不彻底、分级精度低、破损率高、效率缓慢等难题，本研究设计了一种菲律宾蛤仔清洗分级一体机以实现菲律宾蛤仔清洗与分级作业。确定了毛刷辊配合高压喷淋的清洗方法、滚筒式筛分的分级方式，完成了滚筒筛筛分机构、高压水喷淋结构等关键部件设计、选型。开展了清洗分级一体机作业参数的EDEM离散元仿真分析。仿真结果显示：当毛刷辊转速3 r/min、滚筒筛转速15 r/min、滚筒筛倾角3°时，分级精度为91%。经过样机作业测试，在此参数下分级精度达到91%，蛤仔破损率在1%~2%之间，其壳体附着泥沙冲洗干净。研究表明，该清洗分级一体机实现了对菲律宾蛤仔的高效率、高品质的清洗分级。

关键词: 菲律宾蛤仔, 滚筒筛, 高压喷淋, 清洗分级, 离散元