Shipborne variable aspect fin stabilizer

Abstract

The invention discloses a shipborne variable aspect fin stabilizer, which comprises a fin surface, a fin rotating shaft, a rotating shaft of the fin surface, a hydraulic cylinder, a hydraulic cylinder bracket, a fixed shaft and a protective baffle. The shipborne variable aspect fin stabilizer is characterized in that the fin rotating shaft is slidingly connected with a shaft bracket of a ship body; the fin surface is connected with the fin rotating shaft through the rotating shaft of the fin surface; the hydraulic cylinder bracket is fixedly connected to the fin rotating shaft; the hydraulic cylinder is connected with hydraulic cylinder bracket through the fixed shaft; the hydraulic cylinder is connected with the fin surface through the fixed shaft; the protective baffle is fixedly connected to a shell plate of the ship body. Taking into account not only a low aspect ratio fin required for stabilization at low / zero speed, but also a high aspect ratio fin required for stabilization at high speed so as to improve the flexibility and economy of the fin stabilizer.

Description

technical field [0001] The invention relates to ship outfitting, in particular to variable-spread chord stabilizer fins for ships. Background technique [0002] At present, in order to improve the ship's hull attitude control ability in high sea conditions, one or two sets of fin stabilizers are usually installed in the underwater middle of the main hull, such as figure 1 shown. The fin stabilizer drives the fin surface through the fin shaft, so that the fin surface forms a certain angle of attack with the direction of the water flow, thereby generating a certain lift force on the fin surface. The lift force of the fin surface is multiplied by the distance from the fin surface to the center of gravity of the hull to obtain the hull By adjusting the angle of attack of the fin surface, different anti-rolling moments can be generated to achieve the ability to control the attitude of the hull in the sailing state. In the case of the same fin surface area, the larger the aspect...

AI Technical Summary

Problems solved by technology

Due to the relatively small aspect ratio of the fin surface of the low / zero speed stabilizer fin, the lift coefficient of the fin surface is low. In the case of high speed anti-rolling, in order to generate sufficient anti-rolling moment, it is often only possible to use a large-scale fin surface. When the angle of attack is rotated, the disturbance of the fins against the water flow will be more severe, which will generate additional fluid resistance, which is not conducive to improving the economy of anti-rolling navigation

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