Title:
船舶の船尾構造
Document Type and Number:
Japanese Patent JP4781350
Kind Code:
B2
Abstract:
In a ship including a single screw vessel type stem equipped with overlapping propellers, a waterline shape of a stem S in an area of at least 0.4R (R denotes a propeller radius) in a vertical direction from shaft centers of propellers 1 and 2 is formed such that an inclination angle ± of an aft end portion of the waterline is 15 degrees or smaller with respect to a hull centerline, and a virtual width at an aft end position is 600 mm or smaller when the waterline shape is extended to an aft end. Further, a bracket fin 8 may be provided in a space between each of stem tubes 3a and 4a into which propeller shafts 3 and 4 are respectively inserted and the stern S. Moreover, a wake improved fin 13 for improving a wake distribution which is accelerated by the rotation of the fore propeller 2 and flows into the aft propeller 1 is provided above the propeller shafts 3 and 4 and at the stern S.
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Inventors:
Yasunori Iwasaki
Quiver Kazuyuki
Okumura Hideaki
Quiver Kazuyuki
Okumura Hideaki
Application Number:
JP2007507151A
Publication Date:
September 28, 2011
Filing Date:
March 08, 2006
Export Citation:
Assignee:
Kawasaki Heavy Industries, Ltd.
International Classes:
B63H5/08; B63B1/08; B63H5/16
Domestic Patent References:
| JPH0526796U | 1993-04-06 | |||
| JPH08150983A | 1996-06-11 | |||
| JPS5958700U | 1984-04-17 | |||
| JP2004114743A | 2004-04-15 | |||
| JPH04123899U | 1992-11-10 |
Attorney, Agent or Firm:
Patent business corporation Yuko patent office