Design And Test Of The Air Separator For Hickory Shell And Kernel

The research on the material air separation mechanism and the relevant parameters obtained are the important basis for the design of the air separation machine.In this paper,the "dry shell and wet kernel" material of hickory after breaking is taken as the research object.Through mechanical analysis and coupling simulation of material,the parameters of material recovery coefficient,static friction coefficient,rolling friction system,particle free suspension velocity and instantaneous acceleration during collision are clarified.On this basis,it designs an air separation test platform for the aerodynamic characteristics of hickory for experimental research.According to EDEM and FLUENT coupling simulation,high-speed camera and professional measuring instruments,the required wind speed range,design parameters,motion trajectory and mechanical parameters are determined.The simulation model is verified to be applicable to the design and simulation test of virtual prototype by comparing simulation and test-bed test results.The suspension velocity range of each material of Carya cathayensis obtained by the experimental typhoon selection test is: 1 dew kernel 6.8-10.3m/s,2 dew kernels 7.5-10.1 m/s,broken kernels6.9-9.8m/s,2 dew shells 5.3-7.9 m/s,broken shells 4.8-7.6m/s,and shell-kernel chimes5.9-9.4 m/s respectively.The mixed material test confirmed that the overall cleaning rate is99.2% and the false selection rate is 0.8% when the wind speed is 8.21m/s,the water content of kernel is 23.6%,the water content of shell is 5% and the windward face ratio is about 50%.The maximum impact force of the remaining materials is 0.0031 N when the water content is 23.6%,the wind speed is 11.7m/s,and the cleaning rate is 100%,the false selection rate is 2.3%,and the water content is 23.6%.This research provides reference for the research and development of pecan air separation technology and equipment.