Propeller stirrer for crude oil agitation

摘要

Propeller stirring device comprises a propeller (52) having a hub (54) and several propeller blades (56) adjustably fixed to the hub. Preferred Features: The device further comprises an adjusting motor for adjusting the propeller blades. A control device acting on the adjusting motor controls the blades. The rotating axis of the propeller pivots about a vertical axis.