Abstract:In order to satisfy the performance requirements of spatial cam mechanism in rotary converter of liquid fertilizer applicator, such as stable working and precise liquid fertilization, a mathematical model of spatial cam was established. The software for optimizing the spatial cam was developed by using Visual Basic 6.0. The average radius of cylinder was got as 37mm and curve profile of spatial cam was obtained. Threedimensional model and kinematics simulation of spatial cam mechanism were established by using Pro/E software, which verified the design reasonability of spatial cam mechanism. Finally, the mechanism was tested on the testbed. The result showed that when the pump pressure is 0.4MPa and the output shaft speed is 69.75r/min, the fertilizer consumptions are almost the same at different measurement time, and the picking hole mechanism only sprays liquid fertilizer on the rise to fall travel process of converters spatial cam. The results show that the proposed spatial cam mechanism could work smoothly that meets the design requirements of spatial cam.
