Design And Experimental Analysis Of Chain Bar Type Peanut Harvester Laying Device

As an important economic crop,peanuts are very important in our country.In the process of peanut production,there are three main types of harvest: the harvest,the two harvest and the combined harvest.Among them,the two section of the harvest is more common.The excavation,soil removal and laying of peanut plants can be done directly through the two stage peanut harvesting machine,which saves the manpower and material resources,so it is very widely used.According to the working principle,it can be divided into chain link type collector and clamping type collector.The link rod type peanut harvester is widely used in our country because of its simple structure,reliable work and good adaptability.The defect is that it is difficult to achieve regular and orderly placement when collecting vertical peanut(main varieties).Laying is the agricultural link laid out in a field in some way after harvesting,and good laying and laying quality can greatly reduce the loss of peanuts during the field drying process and improve the productivity.Therefore,the study of a kind of chain bar type harvester’s placement device can greatly improve the operation quality of the chain rod peanut harvester.In view of the planting situation in China,especially in Northeast China,three peanut varieties were selected to study the physical and mechanical characteristics of different peanut plants.The friction coefficient of different material conveyer belt is measured: when the water content is the same,the friction coefficient of three varieties of peanut plants and rubber material is the greatest,the second is PU material,and the last is the plastic material;the drying effect test of different laying methods: the drying effect of the two layers of peanut shell and fruit handle is found,and the most form of the fruit seedling is in the form of laying.Well,the next is on the side of the fruit,and finally it is not needed to be laid.The centroid measurement of peanut plant: through the two point centroid formula,it is found that the distance between the bottom of the root of the root of three varieties of peanut plants is greater than the root length,indicating that the center of the peanut plant center of mass is all in the stem.The scheme of laying device for chain rod type peanut harvester is determined.In order to study the working principle of the laying device of the peanut harvester,based on the study of the chain rod type peanut harvesting machine and the characteristics of the erect type peanut plant and harvest time,a chain rod type peanut crane laying test device is designed,which is mainly composed of the frame,motor,transmission system,seedling fruit conveying device and seedling paving.Set up and so on.According to the size of the lift chain,the width of the belt and the length of the protruding shaft are determined.The approximate power of the conveyor belt is calculated.The shaft diameter of the belt is 25 mm.The width of the active roll and the driven roller and the length of the protruding shaft end are determined according to the size of the baffle.The approximate power of the conveyor belt is calculated.The axial diameter of the rod is 15 mm,and the angle of the peanut seedling delivery device can be adjusted by the design of the supporting rod and slider.The angle of the peanut paving device can be adjusted by the design of the positioning ring and the positioning of the inner teeth.Check the gear ring,key and transmission shaft of the placing device,and the result is qualified.Taking the speed of the motor,the angle of the laying device and the height of the end of the laying device as the test factors,the single factor optimization test was carried out with the rate of release as the evaluation index.Finally,the optimal factor conditions are obtained through the analysis of response surface data processing.The best success rate can be obtained when the speed of machine forward has little effect on the success rate of the placement,the speed of the motor is 277.86r/min,the angle of the laying device is 1.38 degrees and the end of the placement device is 0.22 m.Under this optimal factor condition,three parallel experiments were carried out,and the success rate of laying was 96%,which was higher than that of any group before optimization.