Title:
CONTROLLABLE PITCH PROPELLER CONTROL SHIP AND CONTROLLABLE PITCH PROPELLER CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2012/014989
Kind Code:
A1
Abstract:
[Problem] To improve propeller efficiency as high as possible and thereby enable energy-efficient operation [Solution] A controllable pitch propeller control ship is provided with a controllable pitch propeller; a hydraulic unit (13) disposed inside a boss of the controllable pitch propeller and provided for each vane (14) of the controllable pitch propeller to independently vary the vane angle of each vane (14); a vane angle command section (11) for determining a vane angle near the limit of occurrence of a cavitation, depending on the water depth at which the vane (14) is present, to output the resulting vane angle as a vane angle target value (α0) of the vane (14); and a hydraulic unit control section (12) for receiving the vane angle target value (α0) from the vane angle command section (11) to control the hydraulic unit (13) so that the vane angle of the vane (14) takes on the vane angle target value (α0).
Inventors:
ITO MASANORI (JP)
SATO HIROSHI (JP)
SATO HIROSHI (JP)
Application Number:
PCT/JP2011/067300
Publication Date:
February 02, 2012
Filing Date:
July 28, 2011
Export Citation:
Assignee:
DAI ICHI ELECTRIC CO LTD (JP)
ITO MASANORI (JP)
SATO HIROSHI (JP)
ITO MASANORI (JP)
SATO HIROSHI (JP)
International Classes:
B63H3/08; B63H5/07
Foreign References:
| JPS59149890A | 1984-08-27 | |||
| JPS6243390A | 1987-02-25 | |||
| JP2001114195A | 2001-04-24 | |||
| JPS59137290A | 1984-08-07 |
Attorney, Agent or Firm:
KATSUNUMA Hirohito et al. (JP)
Katsunuma Hirohito (JP)
Katsunuma Hirohito (JP)
Download PDF:
Claims: