Optimization And Experimental Study On Key Components Of Small Potato Harvester

Xinjiang puduces the high quality of the wheat, melon and fruit for the reason that there are the unique climates such as long-term light, and large temperature difference.Influenced by regional economic industry and agricultural product diversification strategy put forward by the corps,the local potato planting area in Xinjiang increased year by year. In order to resolve the problems about the poor efficiency of mechanical harvesting and satisfied the requirements of medium-sized farmers,optimization analysis concerning the harvest on one kind of an existing small potato was carried out in this topic to meet the harvest requirements in the region. This paper conducted the following several aspects works:.1.Through the field investigation on potato planting patterns and the characteristics of high ridge in Xin jiang, we analysis the advantages and disadvantages of the existing mechanical harvest in Xinjiang autonomous region.As a result, we provide the reference about optimizing the adaptation of a small potato harvester in Xinjiang.2.By designing and optimizing the key components of small potato harvester frame, and the digging,we confirmed the structure parameters.Through the application of three-dimensional entity modeling software Soildworks, we established a 3Dmodeling for frame and digging shovel, and by using the finite element analysis software ANSYS-Workbench,we conducted the finite element analysis on the key components of frame and digging shovel. By the way of optimizating the frame structure and material of the rear axle, the inherent frequency was improved,at the same time,it avoid the resonance phenomenon caused by the external vibration load,and improve the reliability of the harvester frame. Statics analysis was carried out on the digging shovel,and the maximum stress value was 6.07 e+007Pa, maximum strain was 1 mm, which proved that digging shovel has enough strength in work.3.By using the 3Dscanner(VTOP) data and point splicing software,we complete the entity modeling of potato, and through Hypermesh and ANSYS/LS-DYNA software,we establish the potato mechanical collision model, and by the finite element analysis and test research,we got the mechanical collision safety height of the potato harvester mechanical,which was proved to be 180 mm.Finally,we provided reliable basis for the design of the potato harvester motion parameters.4. According to requirements of the local potato such as harvesting model, dynamic matching requirements, we estimated the structural parameters of separation device. Through separation barrier dynamics analysis of the potato we got the biggest wheel speed and the elevator linear velocity,which were 210r/min and 2.18 m/s respectively. Using ADMAS software to conduct motion simulation of the jitter separation device simplified model, we found that the simulation results proved the rationality of the motion parameters. By calculating the limit collision height of potato under the maximum motion parameters homework, we got the limit collision height, which was 55 mm. This result was far less than the potato mechanical collision safety height, which proved that under the biggest motion parameters, the potato mechanical damage phenomenon will not occur.5. Through well optimized machine field experiment to test the rate of potato, and potato injury rate, and at the same time, using the range analysis method to analysis and calculate the test index, we finally got the optimal combination of the motion parameters.