Foldable bilge keel with groove-shaped base plate

Abstract

The invention discloses a foldable bilge keel with a groove-shaped base plate. The foldable bilge keel comprises the base plate and a rotary plate. The base plate is formed by connecting two structural styles, namely, base plate convex plates and base plate concave plates, in a staggered mode. A shaft sleeve is welded to the outer edge of the base plate, and a rotary shaft is arranged in the shaft sleeve. The rotary plate is composed of an inner plate and a cover plate, one end of the inner plate and one end of the cover plate are in rigid connection with the rotary shaft, the inner plate and the cover plate are arranged in a V shape, the inner plate is formed by connecting two structural styles, namely, inner plate convex plates and inner plate concave plates, in a staggered mode, the inner plate convex plates and the inner plate concave plates correspond to the base plate convex plates and the base plate concave plates in position, and therefore the inner plate can be attached to the base plate after rotating around the rotary shaft. The cover plate is a flat and straight plate, a front supporting box and a rear control box are fixed to the two ends of the rotary shaft through shaft sleeves in a welded mode, the shaft sleeves are rotatably connected with the rotary shaft, a rotary shaft driving device is arranged in the rear control box, and the rotary shaft is connected with the rotary shaft driving device. According to the structure, a folding state can be adopted in a limited channel or small wind waves, and damage such as grounding and collisions is avoided.

Description

technical field [0001] The invention relates to a marine equipment for preventing or reducing rolling, a bilge keel capable of changing shape according to changes in sea conditions, in particular to a foldable bilge keel with a grooved base plate used for low-speed ocean engineering ships. Background technique [0002] Marine structures such as ships and floating offshore platforms will sway under the action of waves. The bilge keel is widely used because of its simple structure, low cost, convenient maintenance and good performance. Almost every ship is equipped with a bilge keel. According to the characteristics of the ship type, the shape and size of the bilge keel are designed. The length is generally 1 / 4 to 1 / 2 of the ship's length, and the width is generally 0.3m to 1.2m. It is usually located below the waterline in the middle of the main hull, arranged along the streamline, and perpendicular to the bilge strake as much as possible. [0003] The principle of bilge kee...

AI Technical Summary

Problems solved by technology

[0008] Due to the same plate area, the width of the bilge keel is more effective than the length. However, the width of the bilge keel is limited to a certain extent, so that the bilge keel is set too long along the length of the ship.

[0009] The bilge keel structure is too simple, usually a simple straight line or a closed V shape, and the anti-rolling effect is generally around 10% to 20%, which is difficult to meet the demand

[0010] For a certain bilge keel, due to the fixed shape and size of the bilge keel, dynamic adjustments cannot be made in response to changes in sea conditions and the priority of roll angle and acceleration, which greatly affects its application range

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