Study On The Self-adaptive Mechanism And Application Of Horizontal Deflection Angle In Agricultural Products Automatic Orientation

Eggs are rich in nutritional value and high in sales.The classification of eggs according to the direction of end can make the eggs be packaged with blunted end upturned,which is helpful to prolong the storage period of eggs,increase the aesthetics of packaging and the marketing value of eggs.Split-and-turn directional device can realize egg automatic orientation.The movement of eggs on the device can be divided into axial motion and turnover motion.The essence of axial motion is crossed friction wheel drive.However,the mechanism of crossed friction wheel drive,horizontal deflection in the transmission and the automatic directional movement of the goose egg have not been reported in the literature.Therefore,in this paper,the mechanism of the crossed friction wheel drive and horizontal deflection angle were studied,and the regularity of the large-sized eggs(goose egg)automatic directional movement was discussed.The results were as follows.The principle of crossed friction wheel drive was analyzed specifically.A kind of friction transmission mechanism widely used in engineering with a certain angle between two transmission axes was analyzed by using the theory of mechanics,and the specification of the classification system conforming to the mechanism and the mechanical transmission was proposed,that was crossed friction wheel drive device.With the mechanism kinematics and dynamics theory,the transmission relationship and force relationship between two crossed friction axis were analyzed,the mechanism of the driven parts spiral movement along the axial(axial movement and rotational movement)was expounded.Two schematic diagrams of the crossed friction wheel drive were constructed.Theoretical calculation method for the axial movement displacement of the driven transmission and method for judging the axial movement direction of the driven transmission were established.The characteristics of adjustable driving force,adjustable displacement,adjustable structure and adjustable speed were summed,the consistency and structure speciality of crossed friction wheel drive and the axial movement in the automatic orientation device were clarified.The mechanism of the horizontal deflection angle in the automatic directional movement was studied.The stable stage of the egg axial movement was analyzed by using dynamic principles.Hypothesis that one of two conveying rollers was used to drive the side of the eggs to drive and the other side was followed was put forward.The velocity relationship of the contact point between the eggs and the driving side was clarified with dynamic hypothesis theoretically and the relationship between conveying roller and the eggs was non-pure rolling transmission.It was showed that the theoretical analysis of eggs,duck eggs and simulated eggs was in agreement with the experimental results and the hypothesis was correct.The forces equilibrium relationship between supporting forces from the conveying roller and gravity of the two contact points during the stable movement was clarified.The geometrical analysis was used to analyze the geometric relationship between the eggs and the two conveying rollers during the stability stage of axial movement,and an approximate calculation method for the horizontal deflection angle theory was established.The experimental verification showed that the theoretical calculation value of the horizontal deflection angle of the eggs was consistent with the test value,the relative error between the theoretical value of the horizontal deflection angle and the test value was less than 5%.The calculation method of deflection angle was also applicable to goose eggs,there was no significant difference in the variance test.Therefore,the theoretical calculation method of the horizontal deflection angle constructed by the geometric analysis method was feasible.The automatic directional movement of goose egg was studied.The conveyor roller parameters of the diameter,the distance between two conveying roller and the horizontal deflection angle were negatively correlated,and they were negatively correlated with the axial movement speed.The turnover speed and the axial movement speed of the conveyor roller were positive.The influence of the diameter of the conveying roller on the turnover movement was not obvious.The distance between the conveyor roller and the distance between the guide and the roller had a negative correlation.The roll distance and the goose egg turnover distance almost did not change when the turnover speed of the conveyor roller changed.The guide rod's working distance increased linearly with the increase of the guide rod's angle,but the variation was small,and the roll distance didn't change as the guide rod's angle increased.The theoretical calculation method for the axial movement and turnover movement of the goose egg was constructed,which was in agreement with other poultry eggs.The best parameters of the device for goose orientation were: conveying roller diameter 40 mm,conveying roller spacing 40 mm,conveying roller rotation speed 70 mm/s and guide r angle 15°.