Design And Experiment Study On Dual-purpose Rape-wheat Precision Metering Device

Rape and wheat which are planting superpower in our country, its cultivation areas are widely distributed. Improve the utilization of planting machines, acording to rpeseeda and wheat physical properties for the difference, developed a dual-purpose rape-wheat precision metering device, its has important significance for real production.According to the differences physical properties of rape and wheat. Puts forward a scheme of dual-purpose rape-wheat precision metering device, designed a dual-purpose rape-wheat precision metering device both suitable for the sowing rape, and wheat planting. In order to improve the utilization of machine, reduce the production cost and improve the rape, wheat mechanization planting degree. Thesis mainly to complete the following job:1) Systematic analysis the status and the development of rapeseed and wheat metering device status of different types at home.. On this basis, the either type of rape-wheat precision metering device and structural components was determined. The metering device working principle and process of the device were introduced.2) Have analysed that is pressing the operation principle of arranging the planting device of either type of rape-wheat precision metering device, have analysed and determined the key structural parameters of metering device, have determined3) Analysis the based theoretical air chamber of dual-purpose rape-wheat precision metering device, and then to determine effect the air chamber stability of factors.Simulation analysis was conducted on air current in air chamber under positive pressure with orthogonal method and ANSYS/FLUENT tools, test factors of air inlet diameter, air outlet diameter and air balanced outlet diameter. Therefore this paper provided a theoretical basis for the design of air chamber of pneumatic precision Seed-metering Device.4) Study on the main factors that impact the fragmentation rate. And carried out single factor experiments and orthogonal experiments. The results of the experiment sent out the best operating parameters. Then the fragmentation patterns of the metering device were analyzed and improvements were proposed. And the metering device had been improved.