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Contra-rotating propeller propulsion-type ship

A technology for propellers and ships, applied in the direction of rotating propellers, rotary propellers, propulsion components, etc., can solve the problems of undisclosed double counter-rotating propellers, etc., and achieve the effect of suppressing the increase of resistance

Inactive Publication Date: 2015-04-22
MITSUBISHI SHIPBUILDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It should be noted that Patent Document 1 does not disclose the case where the propellers of the pod propeller and other propellers are used to form double counter-rotating propellers

Method used

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  • Contra-rotating propeller propulsion-type ship
  • Contra-rotating propeller propulsion-type ship
  • Contra-rotating propeller propulsion-type ship

Examples

Experimental program
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no. 1 approach

[0023] refer to figure 1 , The ship of the first embodiment of the present invention is equipped with a hull 10, a steering mechanism 11 disposed in the hull 10, a steering mechanism 12 disposed in the hull 10, a main screw 20, a pod thruster (POD thruster) 30, rudder plate 40. Steering mechanisms 11 and 12 are sometimes called steering gears. The pod propeller 30 includes a pod-shaped casing 31, a propeller driving mechanism 32 provided in the casing 31, a pod propeller 33 driven by the propeller driving mechanism 32, a strut 34 attached to the casing 31, and a propeller 34 attached to the casing. The fins 36 of the body 31. The fins 36 are arranged below the case 31 . The propeller drive mechanism 32 includes, for example, an electric motor. The strut 34 is arranged above the casing 31 and functions as a rudder. The main propeller 20 is driven by a main engine (not shown) provided in the hull 10 . The pod thruster 30 is steered by the steering mechanism 11 . The steer...

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Abstract

This ship is equipped with a main propeller (20), a pod propulsion device (30) steered by a steering mechanism (11), and a rudder (40) steered by a steering mechanism (12). The main propeller (20), the pod propulsion device (30) and the rudder (40) are arranged on the ship center line (C). The pod propulsion device (30) is provided with a casing (31), a pod propeller (33) and a strut (34). The pod propulsion device (30) is arranged aftward of the main propeller (20). The rudder (40) is arranged aftward of the strut (34). The main propeller (20) and the pod propeller (33) contra-rotate. When the rudder angle of both the pod propulsion device (30) and the rudder (40) is zero, at least a part of the front edge (41) of the rudder (40) is more forward than the back edge (31a) of the casing (31). By this means, during high-speed sailing and steering, the CRP (Contra Rotating Propeller) effect is maintained, and it is possible to suppress increased resistance due to a rudder provided in addition to the pod propulsion device.

Description

technical field [0001] The invention relates to a ship in which the main propeller and the propeller of the pod propeller constitute double counter-rotating propellers. Background technique [0002] Vessels with pod propulsion are known. The pod thruster includes a pod and a propeller driven by a propeller drive mechanism provided in the pod. The propeller is used to obtain the propulsion function. The steering function is obtained by changing the direction of the pod propeller through the steering mechanism arranged in the hull. [0003] Patent Document 1 discloses a ship provided with pod propulsion. The pod thruster is attached to the hull shell plate such as the rear part of the hull so as to be rotatable around a vertical axis via a strut. In addition to pod propellers, the vessel also has independent steering gear. The rudder plate of this steering gear is arrange|positioned at the rear of a pillar, and is attached to the ship body so that it can rotate about a ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63H5/10B63H5/07B63H5/125B63H25/38
CPCB63H5/10B63H25/38B63H5/125B63H25/42B63H2005/1258B63H2005/106B63H1/14B63H25/02
Inventor 松本大辅武田信玄云石隆司黑岩良太
Owner MITSUBISHI SHIPBUILDING CO LTD
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