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Title:
DUCT DEVICE AND SHIP USING THE SAME
Document Type and Number:
Japanese Patent JP2014156202
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a duct device capable of improving furthermore propulsion efficiency, in a technology in which a duct is provided in front of a propeller.SOLUTION: A duct device 5 is arranged in front of a propeller 3 on the stern part 2 of a ship. The duct device includes a duct body. The duct body has a rear edge 7 which is positioned on the rear side of the ship, and draws such an arc that a revolving shaft C1 of the propeller is positioned inside; and a front edge 6 which is positioned on the front side of the ship, and draws such an arc that the revolving shaft is positioned inside, and whose contour shape in the vertical direction to the revolving shaft is larger than that of the rear edge. A cross section by a plane including the revolving shaft of the duct body has a blade shape, and the angle formed between a blade chord line of the cross section and the extension direction of the revolving shaft is larger on such a position that the angle in the circumferential direction centering the revolving shaft is nearer to a vertical line.

Inventors:
YAMADA TAKAYOSHI
OSHIMA AKIRA
KAWAKITA CHIHARU
Application Number:
JP2013028288A
Publication Date:
August 28, 2014
Filing Date:
February 15, 2013
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
B63H5/16
Domestic Patent References:
JPS56138094A1981-10-28
JP2002220089A2002-08-06
JPS62292592A1987-12-19
JPH0450238Y21992-11-26
JP2011178222A2011-09-15
JP2008024072A2008-02-07
JP2008308023A2008-12-25
Foreign References:
KR20120136072A2012-12-18
Attorney, Agent or Firm:
Minoru Kudo
Keisaku Nakao