| 发明名称 | Propulsion device and ship using the same | ||
| 摘要 | A propulsion device of the ship includes a port side screw propeller; and a starboard side screw propeller provided in a forward or backward direction in a longitudinal direction of the ship from the port side screw propeller, such that a part of propeller wings of the starboard side screw propeller overlaps with propeller wings of the port side screw propeller. One of the port side screw propeller and the starboard side screw propeller, which is on a forward side in a longitudinal direction of the ship, is the forward screw propeller, and the other is the backward screw propeller. The forward screw propeller has a wing shape by which tip vortex cavitation is more difficult to be generated by the forward screw propeller than the backward screw propeller. | ||
| 申请公布号 | US9021970(B2) | 申请公布日期 | 2015.05.05 |
| 申请号 | US201113805736 | 申请日期 | 2011.10.07 |
| 申请人 | Mitsubishi Heavy Industries, Ltd. | 发明人 | Kawakita Chiharu |
| 分类号 | B63B1/08;B63H5/08;B63H1/18;B63H1/26 | 主分类号 | B63B1/08 |
| 代理机构 | Wenderoth, Lind & Ponack, L.L.P. | 代理人 | Wenderoth, Lind & Ponack, L.L.P. |
| 主权项 | 1. A propulsion device of a ship, the propulsion device comprising: a port side screw propeller; and a starboard side screw propeller provided in a forward or backward direction in a longitudinal direction of the ship from said port side screw propeller, such that a part of propeller wings of said starboard side screw propeller overlaps with propeller wings of said port side screw propeller, wherein one of said port side screw propeller and said starboard side screw propeller, which is on a forward side in a longitudinal direction of the ship, is a forward screw propeller, and the other is a backward screw propeller, and wherein the number of propeller wings of said forward screw propeller is more than the number of propeller wings of said backward screw propeller. | ||
| 地址 | Tokyo JP | ||