Simulation optimization on sucking up dust particle by suction mouth in sanitation sweepers under the negative pressure

摘要

A suction mouth model is established to research the negative pressure sucking up work process of medium dry brush type sanitation sweeper pneumatic conveying system. The flow field distribution and the dust particle motion residence trajectory are analyzed by numerical simulation, and then some optimization policies are proposed and verified. The result shows that the original suction mouth model have three problems which were solved by optimization policies. In addition, the sucking up velocity is increased by the optimization, but because of the special structure, the longest dust particle residence time is delayed 0.08s compared with the original suction mouth model.