A boat propeller (10) includes a gear box (20), an impeller (30), a stream-guiding ring (50), and a stream-shaping nozzle (60). The gear box (20) has a casing (21) and a transmission shaft (27) partially received in the casing (21). The impeller (30) has an impeller shaft (31) and vanes (38). The impeller shaft (31) has a hollow columnar outer shaft housing (32) and a hollow columnar inner shaft housing (33). The inner and outer shaft housings (32) are connected using a plurality of rib portions (37). The inner shaft housing (33) is further connected to the transmission shaft (27) of the gear box (20). The vanes (38) are integrated formed on an outer peripheral surface of the outer shaft. The stream-guiding ring (50) is assembled to the casing (21) of the gear box (20) to house the impeller (30). The stream-shaping nozzle (60) is connected to a rear end of the stream-guiding ring (50) for providing stream-shaping effects. Thereby, the boat propeller (10) has its water inlet diameter maximized, which helps to improve propulsive efficiency.
BOAT PROPELLER
BOOTSPROPELLER
HÉLICE DE BATEAU
2020-10-21
Patent
Electronic Resource
English
IPC: | B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING |