Bilge keel

Abstract

The invention relates to a bilge keel. A body structure of the bilge keel comprises a fixed clamshell structure (2) and a rotary clamshell structure (1) which are in a flat shape after being combined; the head and tail ends are in a streamline shape; the fixed clamshell structure (2) is fixedly connected to a bilge strake (3); the rotary clamshell structure (1) is connected with the fixed clamshell structure (2) through a rotary shaft system; the rotary shaft system is used for opening and closing the rotary clamshell structure (1). The bilge keel can increase the rolling damping of a ship, effectively reduce rolling of the ship and enhance the rolling stability.

Description

technical field [0001] The invention relates to marine equipment for reducing rolling, in particular to a bilge keel used for anti-sinking, anti-rolling and anti-overturning of ships. Background technique [0002] The swaying motion of the ship is a harmful ship motion, which has adverse effects on the crew, hull structure, mechanical equipment, etc. Ship swaying motions include six types: roll, pitch, yaw, surge, sway and heave, among which roll has the greatest impact on ship performance, followed by pitch. In order to slow down or reduce the sway of the ship, an anti-rolling device can be added to the ship. [0003] According to the essential classification of the force constituting the stabilizing moment, the anti-rolling device can be divided into three types: gravity action type, fluid dynamic action type, and rotary force action type; according to the control form, it can be divided into passive type and active type. At present, the commonly used anti-rolling device...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a bilge keel that can enhance the rolling stability without significantly affecting the speed of the ship

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