Design And Experimental Study Of Squeezing And Rubbing Castor Shelling And Cleaning Device

Castor is an important oil crop,and the quality of castor shelling has a direct impact on the subsequent processing of castor.The castor capsule contained 3 chambers.Its unique structure is different from that of conventional agriculture materials.In this paper,a kind of squeezing and rubbing castor shelling cleaning device is designed and manufactured,according to the physical and mechanical properties of castor capsule,combined with Adams simulation and response surface methodology analysis.The main contents are as follows:(1)The physical and mechanical characteristics properties of castor capsule were studied,the three axes dimensions were measured,their size distributions were analyzed and the sphericity have been calculated.The mechanical properties of castor capsule under linear loading quasi-static pressure were studied.Static friction coefficient of castor capsule was tested;the critical suspended velocity of castor seed and its fragmental products were tested.These experimental studies provide a theoretical basis for the research of an squeezing and rubbing castor shelling and cleaning device.(2)In view of the particular structure of castor capsule,a shelling method of scrubbing and rolling was determined,and a shelling mechanism of asymmetric double circular structure was designed,according to the different mechanism of shell of castor capsule.The cleaning mechanism of vibration screening and gas suction was designed.The transmission system of the squeezing and rubbing castor shelling and cleaning device was designed.The overall structure of the squeezing and rubbing castor shelling and cleaning device was determined.(3)The structure parameter of the asymmetric double circular structure of the inner and outer shelling drum were designed and optimized,by using analytical method.The mathematical models for the castor location and clearance of shelling drum at different stages was established,which provided the theoretical basis of dynamic simulation of shelling device.The structure parameter and motion eigenvalue were determined.(4)The displacement,velocity and force of the material at the stage of cracking and hulling,and the influence of the two stages of the different rotational speed and the clearance of the outlet were analyzed,using Adams dynamic simulation.The correctness of mathematical models were verified,and the rationality of design of hulling mechanism and its operating parameters range were verified.(5)The reasonable operating parameters range of the squeezing and rubbing castor shelling and cleaning device were selected,according to the simulation results of Adams.An experimental research was carried out by the response surface methodology,with the rotation speed of the shelling drum,the clearance of the discharging outlet of the upper and lower shelling drum as the factor,and the deactivation rate and the breakage rate as the index.After the double objective optimization,the rotation speed of the shelling drum was 270r/min,the clearance of the outlet of the upper shelling drum was 13.5mm,and the clearance of the outlet of the lower shelling drum was 5mm.The experiment showed that the shelling device has the best operating performance under these operating parameters,the deactivation rate was 92.03%,and the breakage rate was 3.10%.