Fin stabilizer
By using hollow cavity fins made of flexible materials and fluid control technology, the problems of large weight, large space occupation, and high energy consumption of existing anti-roll fins have been solved, achieving lightweighting and space saving, and reducing manufacturing costs.
Patent Information
- Application Number
- CN202511966154.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-24
- Publication Date
- 2026-02-27
AI Technical Summary
Existing anti-roll fins are heavy, occupy a large space, consume a lot of energy, are expensive, and have complex manufacturing processes. Existing improvement methods cannot comprehensively solve these problems.
The hollow cavity fins, made of flexible materials, unfold and fold by fluid filling and discharging, reducing weight and volume. Combined with a retrieval rope and rotating fin arm device, the fins can be stored and extended.
The overall weight and volume of the anti-roll fins are reduced, saving internal space in the ship, reducing propulsion power consumption, and minimizing damage to the hull structure. The process is simple and economical.
Smart Images
Figure CN121573115A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of ship roll reduction devices, and in particular to a refillable roll reduction fin. Background Technology
[0002] When ships sail on the sea, they are affected by wind, waves, and swells, causing them to roll. This type of rolling, which is detrimental to navigation, can cause seasickness and severe discomfort for passengers on passenger ships, affect the accuracy and safety of construction on engineering vessels, affect the direction of shell firing on warships, and affect the security of cargo lashing on cargo ships. In short, it can greatly affect the safety of navigation, operation, and the transportation of passengers and cargo. Therefore, anti-roll fins are widely installed and used as an important ship anti-roll device.
[0003] Currently, almost all anti-roll fins on the market are streamlined, enclosed structures welded from metal, using hydraulic mechanisms to rotate and extend the fins. The weight of a complete anti-roll fin system ranges from several tons to tens of tons, significantly increasing the ship's weight, occupying considerable storage space, and raising construction costs. Because the fins are welded from steel plates, their shape is fixed and cannot be reduced in size. Even when the fins are not needed, the ship must carry these large fins, greatly consuming its power.
[0004] In summary, most anti-roll fins on the market currently suffer from problems such as heavy weight, large space occupation in ship storage, high energy consumption, high cost, and complex manufacturing process.
[0005] Furthermore, to address the aforementioned problems, current methods mostly involve improving the fin shape and increasing the lift coefficient to reduce the fin area, thereby reducing weight. However, this method can only reduce weight to a limited extent, addressing only one aspect of the fin's roll reduction problem locally, and cannot comprehensively solve the aforementioned issues. Summary of the Invention In view of the above-mentioned problems existing in the prior art, the present invention provides an inflatable anti-roll fin. The fin blades are made of flexible material and the interior of the fin blades is a hollow cavity. It can be a single cavity or composed of several cavities, thereby achieving the effect of reducing weight and reducing the large amount of space occupied by the ship's storage space.
[0006] This invention provides a roll-damping fin, comprising: The fin is made of a flexible material and has at least one hollow cavity inside. When the fin is in use, fluid is filled into the hollow cavity of the fin through a fluid filling device, causing the fin to unfold. When the fins are not in use, the fluid in the hollow cavity is drained through the fluid discharge device. After the fluid is drained, the fins can be folded and retracted into the hull. The fin arm, driven by the fin power unit, extends or retracts the fins that are not in use into the hull.
[0007] In some embodiments of the present invention, the outer shell material of the fin is a flexible and foldable material, which enables the fin in use to maintain a fixed shape each time the hollow cavity is filled with at least one of fluid or non-fluid.
[0008] In some embodiments of the present invention, the fluid is at least one of seawater, fresh water, oil, gel, or gas.
[0009] In some embodiments of the present invention, the non-fluid is at least one of sand, powder or foam particles.
[0010] In some embodiments of the present invention, the outer shell thickness of the hollow cavity of the fin is determined based on the magnitude of the load, and the outer shell thickness ranges from 0.1 mm to 500 mm.
[0011] In some embodiments of the present invention, the outer shell of the hollow cavity is made of an impact-resistant, corrosion-resistant, and non-toxic material. Preferably, the outer shell is a polymer material such as nylon, polyethylene, or polypropylene.
[0012] In some embodiments of the present invention, longitudinal and transverse reinforcing ribs are formed in the hollow cavity of the fin to enhance the structural strength of the hollow cavity.
[0013] In some embodiments of the present invention, the anti-roll fin further includes: Multiple retrieval ropes are respectively provided on the transverse and longitudinal reinforcing ribs in the hollow cavity, for retrieving and folding the fins into the hull when the fins are not in use. One end of the retrieval rope is fixed to the reinforcing rib inside the hollow cavity, and the other end is fixed to the fluid filling device or fluid discharging device of the fin.
[0014] In some embodiments of the present invention, the recovery rope specifically enters the hollow cavity of the fin through a filling pipe and is fixed to the reinforcing ribs inside the hollow cavity.
[0015] In some embodiments of the present invention, the filling tube is nested within the rotating fin arm.
[0016] In some embodiments of the present invention, the fin blades and the rotating fin arms are sealed and fixedly connected by a connection port; The fluid filling device, the fluid discharging device, and the fin-rotating power unit are all installed inside the ship.
[0017] Compared with the prior art, the beneficial effects of the anti-roll fin provided in this embodiment of the invention are as follows: When not in use, the anti-roll fin reduces its weight by discharging the filled fluid, making the overall weight of the anti-roll fin lighter. At the same time, after discharging the filled fluid, the overall volume of the anti-roll fin is also greatly reduced. With the help of the retrieval rope, the fin blades can be folded and retracted, which greatly reduces the space occupied inside the ship and saves storage space inside the ship. Furthermore, due to the reduction in overall weight, the consumption of ship propulsion power is also reduced. In addition, since the anti-roll fin is in a retracted and folded state when it is retracted into the ship and when it is extended outside the ship, the hull opening required for its fin blades is smaller, which reduces the strength loss caused to the ship's outer plate and thus reduces the loss to the structural strength of the ship.
[0018] In summary, the overall manufacturing process of the anti-roll fin is simple. Its fin blades are made of flexible materials, and the forming process is relatively simple. There are no large-scale steel welding, bending plate and other process steps. It is also economical, easy to manufacture, and can be mass-produced to reduce costs. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the anti-roll fin provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the cross-section of the anti-shake fin filling tube provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the anti-slip fin after fluid discharge, provided in an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the usage of anti-roll fins on a ship according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the anti-roll fins after they have discharged fluid on a ship, as provided in an embodiment of the present invention. Figure 6 This is a schematic diagram of the anti-roll fins provided in an embodiment of the present invention after they have been stored on a ship.
[0020] Figure Labels 1. Fins; 2. Filling tube; 3. Reinforcing ribs; 4. Retraction rope; 5. Connection port; 6. Fluid filling device; 7. Rotating fin arm; 8. Rotating fin power unit; 9. Ship. Detailed Implementation
[0021] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0022] Various embodiments and features of this application are described herein with reference to the accompanying drawings.
[0023] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.
[0024] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application, which have the features described in the claims and are therefore all within the scope of protection defined herein.
[0025] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.
[0026] Specific embodiments of this application are described below with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to ascertain the true intent based on the user's historical operations, and to avoid unnecessary or redundant details that would obscure this application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in various ways with substantially any suitable detailed structure.
[0027] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.
[0028] This invention provides a roll-damping fin, such as... Figures 1 to 6 As shown, it includes: The fin 1 is made of a flexible material and has at least one hollow cavity inside. That is, there can be one hollow cavity inside the fin 1 or there can be several hollow cavities. When the fin 1 is in use, fluid is filled into the hollow cavity of the fin 1 through the fluid filling device 6, so that the fin 1 unfolds. When the fin 1 is not in use, the fluid in the hollow cavity is discharged through the fluid discharge device. After the fluid is discharged, the fin 1 can be folded and shrunk and stored inside the hull. The fluid filling device 6 and the fluid discharge device can be the same device. After the fluid in the fin 1 is discharged, the volume of the fin 1 is greatly reduced. It can be folded and shrunk using the recovery rope 4, making it easy to store inside the hull. The rotating fin arm 7, driven by the rotating fin power unit 8, extends or retracts the fin blade 1, which is not in use, into the hull.
[0029] Due to the streamlined shape requirement of the anti-roll fin, the shape of its fin blade 1 is fixed and cannot be arbitrary. Furthermore, the material used for the fin blade 1 is not an elastic material. Therefore, in this embodiment, the outer shell material of the fin blade 1 is made of a flexible and foldable material, which ensures that the shape of the fin blade 1 in use is fixed after each time the hollow cavity is filled with fluid, thereby meeting the streamlined shape requirement of the anti-roll fin.
[0030] When filling with fluid, seawater is preferred, but fresh water, oil, gel, or other flowable fluids are also acceptable. Of course, gas is also acceptable. In this embodiment, seawater is preferred because it can be obtained from the sea at any time, does not need to be carried and stored by the ship 9, and can be directly discharged into the sea when not in use.
[0031] In this embodiment, the outer shell thickness of the hollow cavity of the fin 1 is determined based on the magnitude of the load, and the outer shell thickness ranges from 0.1mm to 500mm.
[0032] The outer shell of the hollow cavity is made of impact-resistant, corrosion-resistant and non-toxic materials.
[0033] A reinforcing rib 3 is formed in the hollow cavity of the fin 1 to strengthen the structural strength of the hollow cavity. The reinforcing rib 3 includes longitudinal reinforcing ribs and transverse reinforcing ribs.
[0034] In some embodiments of the present invention, the anti-roll fin further includes: a plurality of retraction ropes 4, which are respectively disposed on the transverse reinforcing ribs and longitudinal reinforcing ribs in the hollow cavity, for use in order to fold the hollow cavity of the fin 1 to a smaller volume by means of the ropes when the fin 1 is not in use, and then store it into the hull. One end of the recovery rope 4 is fixed to the reinforcing rib 3 inside the hollow cavity, and the other end is fixed to the fluid filling device 6 or the fluid discharge device of the fin 1.
[0035] The filling tube 2 is nested inside the rotating fin arm 7 to provide protection and prevent damage from external forces.
[0036] The fin blade 1 and the rotating fin arm 7 are connected and fixed by the connector 5 and sealed.
[0037] The fluid filling device 6, the fluid discharge device, and the fin-rotating power unit 8 are all installed inside the ship 9.
[0038] As can be seen from the above technical solution, the beneficial effects of the anti-roll fin provided by the above embodiments of the present invention are as follows: When the anti-roll fin is not in use, the weight is reduced by discharging the filled fluid, making the overall weight of the anti-roll fin lighter. At the same time, after discharging the filled fluid, the overall volume of the anti-roll fin is also greatly reduced. After the fin blade 1 is folded and retracted with the recovery rope 4, the space occupied inside the ship 9 is greatly reduced, saving storage space inside the ship 9. Furthermore, due to the reduction in overall weight, the consumption of propulsion power of the ship 9 is also reduced. In addition, since the anti-roll fin is in a retracted and folded state when it is retracted into the ship 9 and when it is extended outside the ship 9, the hull opening required for its fin blade 1 is smaller, reducing the strength loss caused to the outer plate of the ship 9, and thus reducing the loss to the structural strength of the ship 9.
[0039] In summary, the overall manufacturing process of the anti-roll fin is simple. Its fin blade 1 is made of flexible material, and the forming process is relatively simple. There are no large-scale steel welding, bending plate and other process steps. It is also economical, easy to manufacture, and can be mass-produced to reduce costs.
[0040] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.
Claims
1. A roll-damping fin, characterized in that, include: The fin is made of a flexible material and has at least one hollow cavity inside. When the fin is in use, fluid is filled into the hollow cavity of the fin through a fluid filling device, causing the fin to unfold. When the fins are not in use, the fluid in the hollow cavity is drained through the fluid discharge device. After the fluid is drained, the fins can be folded and retracted into the hull. The fin arm, driven by the fin power unit, extends or retracts the fins that are not in use into the hull.
2. The anti-roll fin according to claim 1, characterized in that, The outer shell material of the fin is a flexible and foldable material, which ensures that the shape of the fin in use is fixed after each time the hollow cavity is filled with at least one of fluid or non-fluid.
3. The anti-roll fin according to claim 2, characterized in that, The fluid is at least one of seawater, fresh water, oil, gel, or gas; or the non-fluid is at least one of sand, powder, or foam particles.
4. The anti-roll fin according to claim 3, characterized in that, The thickness of the hollow cavity shell of the fin is determined based on the load size, and the shell thickness ranges from 0.1mm to 500mm.
5. The anti-roll fin according to claim 4, characterized in that, The outer shell of the hollow cavity is made of impact-resistant, corrosion-resistant and non-toxic materials.
6. The anti-roll fin according to claim 5, characterized in that, The hollow cavity of the fin is formed with longitudinal and transverse reinforcing ribs to strengthen the structure of the hollow cavity.
7. The anti-roll fin according to claim 6, characterized in that, Also includes: Multiple retrieval ropes are respectively provided on the transverse and longitudinal reinforcing ribs in the hollow cavity, for retrieving and folding the fins into the hull when the fins are not in use. One end of the retrieval rope is fixed to the reinforcing rib inside the hollow cavity, and the other end is fixed to the fluid filling device or fluid discharging device of the fin.
8. The anti-roll fin according to claim 7, characterized in that, The recovery rope specifically enters the hollow cavity of the fin through the filling tube and is fixed to the reinforcing ribs inside the hollow cavity.
9. The anti-roll fin according to claim 5, characterized in that, The filling tube is nested inside the rotating fin arm.
10. The anti-roll fin according to claim 5, characterized in that, The fin blades and the rotating fin arms are sealed and fixedly connected via a connection port; The fluid filling device, the fluid discharging device, and the fin-rotating power unit are all installed inside the ship.