Marine stabilization device suitable for full navigational speed

Abstract

The invention discloses a marine stabilization device suitable for full navigational speed. The marine stabilization device comprises a fin-shaped stabilization device, a cylindrical stabilization device, a cylindrical stabilization device transmission rod, a motor, a fin-shaped stabilization device transmission rod and a base. According to the invention, the fin head of a traditional fin stabilizer is improved through the cylindrical stabilization device, and on the basis that the streamline structure of the original fin head is reserved, the fluid acting force generation mode is fused. The marine stabilization device has the advantages that compared with a traditional fin stabilizer, an area-deformed parallelogram fin stabilizer and a Magnus stabilization device, the direction and size of the provided fluid acting force are constant, and the fluid acting force is not limited by the attack angle and does not change periodically. In addition, on the premise that excessive energy is not consumed, the stabilization capacity suitable for the full navigational speed is achieved, and the better use value is achieved.

Description

technical field [0001] The invention belongs to the field of ship motion control technology and special auxiliary equipment for ships, and relates to a high-end ocean engineering equipment based on the Magnus effect to improve traditional fin stabilizers, in particular to a ship anti-roll device suitable for full speed. Background technique [0002] Ships sailing on the sea are disturbed by the natural environment such as sea wind and waves, which will inevitably produce swaying motions, of which the rolling motion is the most obvious. Rolling motion will affect the posture of the hull and the safety of the crew. In order to reduce such effects, applying high-end ocean engineering equipment to ships is one of the most common and effective solutions. There are many types of such high-end marine engineering equipment, specifically involving bilge keels, anti-rolling tanks, anti-rolling gyroscopes, and external anti-rolling devices, among which external anti-rolling devices are...

AI Technical Summary

Problems solved by technology

[0004] (1) The magnitude of the fluid force generated by the traditional fin stabilizer is approximately proportional to the square of the incoming flow velocity, and its working mechanism depends on the relatively large relative velocity caused by the ship sailing, so when the ship is in a low / zero speed state, Traditional fin stabilizers will not be able to generate a large fluid force, which will lead to poor or even impossible stabilization of traditional fin stabilizers, and traditional fin stabilizers are limited by the rated angle of attack. The generated fluid force will have a limit value, and the generated fluid force is sometimes not enough to resist excessive rolling force;

[0005] (2) According to Song Jiguang's paper "Optimized Design of Fin Stabilizer Fins at Full Velocity", the fluid force of the parallelogram stabilizer fins with deformed area during the flapping process will periodically occur with the change of the fin angle The change of , not a steady increase or decrease, will make it difficult to achieve stable control, and the effective projected area of ​​the parallelogram fin with deformed area is obtained by expanding the fin surface, which will increase the work of the fin The resistance encountered by the ship will increase the energy consumption of the ship when sailing;

[0006] (3) The marine Magnus anti-rolling device described in Pangalila's patent "Fixed-angle stabilizing fin system" and Kollenberger's patent "Stabilizing device for ships" can cause a certain fluid effect on the surface of the device when the ship is at low / zero speed force, but its effective projected area is small when it works, and the fluid force generated is not large enough, so the use efficiency of the Magnus anti-rolling device is not high enough, the anti-roll effect is not good enough, and the direction of the fluid force provided by the swing will be different. Changes in real time with the swing period

[0007] To sum up: at present, it is difficult for the traditional fin stabilizer to guarantee the ideal anti-roll capability at full speed, and the fluid force provided will be limited by the angle of attack; the parallelogram stabilizer fin with area deformation is limited The generation mechanism of its own fluid force cannot produce aperiodic constant fluid force that is conducive to control, and the increase in resistance will increase the energy consumption of the ship during navigation; the Magnus anti-rolling device itself has inherent defects and is not efficient enough High, the anti-rolling effect is not good enough, and it cannot cancel the change in the direction of the fluid force at low / zero speed

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