气力式油菜精量排种检测系统的设计

Pneumatic metering device for rapeseed has been used extensively due to its perfect performance on metering recently. To study the metering system of the seeder and the coupling machanism of penumatic device, a test rig of pneumatic metering system for rapeseed was designed. The test rig could be used for the performance assessment of various models of seeder, which were assembed different penumatic metering system and worked with different situation, including the number of seed metering, the rotating speed, the flow rate of fan , the overflow of positive pressure and the parameter of penumatic device, hence this investigation could be carried out to study the optimum parameters of metering device and pneumatic device, and the structure parameter of metering device and pneumatic device of the seeder would be optimized .