The invention provides a propeller for a two-stage duct type boat and relates to a propeller for a boat. The propeller for the two-stage duct type boat is mainly composed of an inner boat shaft, an outer boat shaft, a propeller part I, a propeller part II, a propeller part III, double-headed stud parts and sealing plugs. When the propeller for the two-stage ducted boat is operated, the outer boat shaft drives the propeller part I and the propeller part II to rotate in the rotation direction of the outer boat shaft, the inner boat shaft drives the propeller part III to rotate in the rotation direction of the inner boat shaft, and thus the function of conveying water flow by a two-stage liquid pump is fulfilled. The water flow is ejected through the rear end of a duct II and pushes the boat to advance. Tips of blades of the propeller for the two-stage duct type boat are connected with the inner surfaces of the ducts, thus high structural strength and rigidity of the propeller for the two-stage duct type boat are guaranteed, and a composite material represented by carbon fiber reinforced plastic is suitable for the propeller.
Propeller for two-stage duct type boat
2015-08-26
Patent
Electronic Resource
English
IPC: | B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING |