Marine vessel

Patent metadata

Field	Value
Publication number	US-11591056-B2
Application number	US-202017137604-A
Country	US
Kind code	B2
Filing date	Dec 30, 2020
Priority date	Jan 17, 2020
Publication date	Feb 28, 2023
Grant date	Feb 28, 2023

Abstract

A marine vessel capable of improving propulsion efficiency for the entire operation of the marine vessel. In the marine vessel, which includes a hull and a propeller provided on a stern side of the hull, n2D/√(Bd) is 4 or more and 35 or less, in a case where n is the number of the propeller, D is a diameter of the propeller, B is a water line breadth of the hull, and d is a draft of the hull.

First claim

The invention claimed is:

1. A marine vessel comprising:
a hull; and
a propeller provided on a stern side of the hull,
wherein
n 2 D/√(Bd) is 4 or more and 35 or less, in a case where
n is the number of the propeller,
D is a diameter of the propeller,
B is a water line breadth of the hull, and
d is a draft of the hull.

2. The marine vessel according to claim 1 , wherein the n 2 D/√(Bd) is 5 or more and 15 or less.

3. The marine vessel according to claim 2 , wherein the n 2 D/√(Bd) is 7 or more and 10 or less.

4. A marine vessel comprising:
a hull; and
a propeller provided on a stern side of the hull,
wherein
n×Σ(D/√(Bd)) is 4 or more and 35 or less, in a case where
n is the number of the propeller,
D is a diameter of the propeller,
B is a water line breadth of the hull, and
d is a draft of the hull.

5. The marine vessel according to claim 4 , wherein the n×Σ(D/√(Bd)) is 5 or more and 15 or less.

6. The marine vessel according to claim 5 , wherein the n×Σ(D/√(Bd)) is 7 or more and 10 or less.

7. The marine vessel according to claim 1 , wherein an extension line of a rotation central axis of the propeller is located within a range of the hull located on a bow side from a position of the propeller, by a length of 12.5% of a length between perpendiculars Lpp of the hull.

8. The marine vessel according to claim 1 , wherein the propeller includes a plurality of the propellers, and a position of one of the propellers is shifted from a position of another of the propellers in a front-back direction of the hull.

9. The marine vessel according to claim 1 , wherein the propeller includes a plurality of the propellers, and a position of one of the propellers and a position of another of the propellers partially overlap each other in at least one of a molded breadth direction and a vertical direction of the hull.

10. The marine vessel according to claim 1 , wherein the propeller includes a plurality of the propellers that include a shaft-driven propeller and a propeller constituting a POD type thruster.

11. The marine vessel according to claim 1 , wherein the propeller constitutes a POD type thruster including an azimuth mechanism.

12. The marine vessel according to claim 1 , wherein the propeller is provided so as to be inclined such that a rotation central axis of the propeller is positioned on an upper side toward a stern side.

13. The marine vessel according to claim 1 , wherein the propeller includes a plurality of the propellers, and the number of the plurality of propellers to be driven is changed in accordance with an operation mode.

14. The marine vessel according to claim 4 , wherein an extension line of a rotation central axis of the propeller is located within a range of the hull located on a bow side from a position of the propeller, by a length of 12.5% of a length between perpendiculars Lpp of the hull.

15. The marine vessel according to claim 4 , wherein the propeller includes a plurality of the propellers, and a position of one of the propellers is shifted from a position of another of the propellers in a front-back direction of the hull.

16. The marine vessel according to claim 4 , wherein the propeller includes a plurality of the propellers, and a position of one of the propellers and a position of another of the propellers partially overlap each other in at least one of a molded breadth direction and a vertical direction of the hull.

17. The marine vessel according to claim 4 , wherein the propeller includes a plurality of the propellers that include a shaft-driven propeller and a propeller constituting a POD type thruster.

18. The marine vessel according to claim 4 , wherein the propeller constitutes a POD type thruster including an azimuth mechanism.

19. The marine vessel according to claim 4 , wherein the propeller is provided so as to be inclined such that a rotation central axis of the propeller is positioned on an upper side toward a stern side.

20. The marine vessel according to claim 4 , wherein the propeller includes a plurality of the propellers, and the number of the plurality of propellers to be driven is changed in accordance with an operation mode.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Hosono Kazuki
• Kawabuchi Makoto
• Yamada Takuyoshi

Classifications

• B63H2005/1258

  with electric power transmission to propellers, i.e. with integrated electric propeller motors · CPC title

• B63H5/125 Primary

  movably mounted with respect to hull, e.g. adjustable in direction {, e.g. podded azimuthing thrusters}({outboard units or Z-drives B63H20/00; } movably mounted for steering purposes only, {rudders carrying propellers} B63H25/42) · CPC title

• B63H5/08 Primary

  of more than one propeller · CPC title

• B63H2005/1254

  Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis · CPC title

• B63H21/17

  by electric motor · CPC title