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Title:
SUCTION CASING OF WATER-JET PROPULSION UNIT
Document Type and Number:
Japanese Patent JP2014031059
Kind Code:
A
Abstract:

To provide a suction casing of a water-jet propulsion unit, in which fatigue strength of components can be improved by distributing stress to a flow passage of the suction casing or a plate for mounting the suction casing on a boat.

In a water-jet propulsion unit where a main shaft of an impeller passes through an inclined flow passage 11 and is pivotally supported by a bearing box provided on a suction casing, a bearing flange 12 connecting the bearing box is fixed to the inclined flow passage 11, and a horizontal rib 14 and a vertical rib 15 are extended to the inclined flow passage 11 so that stress acting on the bearing flange 12 is distributed to the inclined flow passage 11. In addition, in order to reduce torsion stress and bending stress acting on joint surfaces between the inclined flow passage 11 and a bottom part mounting plate 18 and between the inclined flow passage 11 and a transom mounting plate 20, a bow side rib 16 and a stern side rib 17 are continuously erected so as to connect the joint surfaces or components.


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Inventors:
Katayama, Junichi
Application Number:
JP2012000171571
Publication Date:
February 20, 2014
Filing Date:
August 02, 2012
Export Citation:
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Assignee:
ISHIGAKI CO LTD
International Classes:
B63H11/08
Domestic Patent References:
JP2001122191A2001-05-08
JPH0455192A1992-02-21
JPH0462296U1992-05-28
Foreign References:
WO2007111590A12007-10-04



 
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