Abstract: In order to solve the problem of high impurity content in the sieve of Seabuckthorn berries, a threelayer structure roller screen device was designed, and the parameters of key components such as vibration motor and damping spring were determined. The vibration force of roller screen was 7 644 N. The power of roller screen was 3.24 kW. The stiffness of damping spring was 8 047.3 N/m. EDEM discrete element software was used for simulating the rotating speed and inclination angle of the roller screen analysis. The simulation results showed that the screening efficiency and impurity content were 84.2% and 6.98% when the rotary speed and inclination Angle of the roller screen were 38 r/min and 8°. The variance analysis was carried out with two factors and three levels of the rotating speed and inclination angle as independent variables, and screening efficiency and impurity rate as indexes. The test showed that the rotating speed was 38 r/min and the angle was 8°, the screening efficiency and impurity rate were 82% and 87%, respectively. Screening efficiency difference between measured and simulation test was 2.2%, the impurity rate difference was 1.72%.

Key words: Seabuckthorn, roller screen, EDEM, variance analysis

摘要： 为解决沙棘浆果中含有杂质,导致浆果筛分含杂较高的问题,设计三层结构滚筒筛装置,并确定振动电机、减震弹簧等关键部件参数。其激振力为7 644 N,功率为3.24 kW,减震弹簧刚度8 047.3 N/m。使用EDEM离散元软件对滚筒筛的转速、倾角进行模拟分析。模拟结果表明:当滚筒筛转速、倾角为38 r/min、8°时,其筛分效率、含杂率为84.2%、6.98%。以转速、倾角两个因素为自变量,筛分效率、含杂率为指标进行方差分析,当滚筒筛转速为38 r/min、倾角为8°时是最优参数组合解,且筛分效率、含杂率分别为82%、8.7%。实测值与仿真试验的筛分效率相差2.2%,含杂率的相差1.72%。

关键词: 沙棘, 滚筒筛, EDEM仿真, 方差分析