Water jet propulsion apparatus

Details Water jet propulsion apparatus Water jet propulsion apparatus

B - Operations, Transporting

63

H

B63H 11/00 (2006.01) B63H 11/08 (2006.01) B63H 11/103 (2006.01)

Patent

CA 2395728

To sufficiently reduce a rotation component of a water stream very close to the external face of a cap 34 of a bearing, reduce the size of the cap 34, and make positioning between the cap 34 and another stationary vane 31c1 unnecessary. In a water jet propulsion apparatus having a duct 31 forming a channel, an impeller 32 disposed in the duct 31, a bearing 33 of the impeller 32 provided in the duct 31, and a cap 34 closing the rear end of the bearing 33, stream straightening grooves 34a are formed in the external face of the cap 34. In a portion facing the cap 34, in the internal face of the duct 31, a stationary vane 31c1 is formed toward the cap 34.

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