Ship rotating cylinder wind sail device with anti-rolling function and application method

Abstract

The application belongs to the technical field of ships, and proposes a ship rotating cylinder wind sail device with a stabilizing function and an application method. The device comprises a vent hole, a high-position vent valve, a middle-position water passage valve, a low-position water passage valve, a high-position water storage cabin, a middle-position water storage cabin, a low-position water storage cabin, a bearing, a high liquid level sensor, a middle liquid level sensor, a low liquid level sensor, a drain pipe, a three-way valve, a water pump, a central shaft, a rotating cylinder, a water delivery pipe and a water inlet pipe. The application is based on the problem of affecting the stability of the ship in the application process of the rotating cylinder wind sail, uses the hollow feature of the rotating cylinder wind sail, increases the mass of the whole rotating cylinder wind sail, and further improves the rotational inertia of the rotating cylinder wind sail, thereby improving the stability of the ship sailing. The ship rotating cylinder wind sail device with a stabilizing function and the application method can promote the mature application of the rotating cylinder wind sail, and have great practical application value.

Description

Technical Field

[0001] This invention belongs to the field of marine technology, specifically relating to a ship rotary sail device with anti-roll function and its application method. Background Technology

[0002] With increasingly stringent emission standards set by the International Maritime Organization, more and more merchant ships are adopting clean and renewable energy sources such as wind and solar power. Among these, rotary sails are a common form of wind energy utilization on merchant ships, generating thrust based on the Magnus effect to aid navigation. However, rotary sails can also negatively impact ship stability during navigation. This is primarily because installing rotary sails adds weight to the deck, raising the ship's center of gravity and lowering its center of gravity, which negatively affects the ship's initial stability.

[0003] The diameter of a typical merchant ship's rotary sail is approximately 5 meters, and its height is about 30 meters. During navigation, the rotary sail's rotational speed is set according to external wind conditions, but it generally reaches several hundred revolutions per minute or more. The linear velocity of the outermost part of the rotary can reach 40 to 50 m / s, resulting in a high linear velocity during navigation. Based on this characteristic, the rotary sail can be considered a gyroscope. As is well known, the roll-damping ability of a gyroscope is determined by the product of the rotor's angular momentum and angular velocity. The rotational angular velocity of the rotary sail is related to external wind conditions and cannot be arbitrarily changed. According to the definition of angular momentum and the hollow nature of the rotary sail, to increase its roll-damping ability, the hollow space within the sail can be used to increase its overall mass, thereby increasing the moment of inertia and enhancing its roll-damping capability.

[0004] Based on the problems existing in the application of rotary sails and their characteristics, this invention proposes a rotary sail device and application method with anti-roll function. This invention cleverly utilizes the increased internal space of existing rotary sail devices to increase the overall mass of the rotary sail, thereby increasing its moment of inertia. This increases the ship's stability and solves the problem of poor initial stability of ships equipped with rotary sails. Simultaneously, this rotary sail device and application method with anti-roll function proposed in this invention can improve the safety of ship navigation, making rotary sails a more mature application technology, promoting their widespread use, and possessing significant practical application value. Summary of the Invention

[0005] This invention addresses the issue of ship stability being affected during the application of rotary sails, proposing a ship rotary sail device and application method with anti-roll function. The device includes: a vent, a high-level water valve, a mid-level water valve, a low-level water valve, a high-level water tank, a mid-level water tank, a low-level water tank, bearings, a high-level liquid level sensor, a mid-level liquid level sensor, a low-level liquid level sensor, a drain pipe, a three-way valve, a water pump, a central shaft, a rotary sail, a water supply pipe, and a water inlet pipe.

[0006] The rotating cylinder is the outermost sleeve of the rotating cylinder sail. The rotating cylinder is driven to rotate by a drive device installed on the ship. During the ship's navigation, the rotating cylinder will have a high rotational speed. The linear velocity of the outermost part of the rotating cylinder can reach 40m / s to 50m / s. Therefore, increasing the overall mass of the rotating cylinder can greatly increase the rotational inertia of the entire rotating cylinder.

[0007] The central shaft is mounted and fixed on the ship's deck to support the rotation of the rotary drum.

[0008] There are two bearings, which are respectively installed and fixed at the upper and lower ends of the central shaft, so that the rotating cylinder and the central shaft can be rotated together.

[0009] The low-level water storage tank, the middle-level water storage tank, and the high-level water storage tank are all located inside the vortex. The low-level water storage tank is located at the bottom of the vortex, the middle-level water storage tank is located in the middle of the vortex, and the high-level water storage tank is located at the top of the vortex. This divides the internal space of the vortex into three independent water storage tanks, which can ensure that water is injected into each tank individually and avoid the water moving with the inner wall of the vortex when the vortex rotates, thus preventing the water from having an excessive impact on the stability of the ship.

[0010] The high-level sensor is installed at the top of the high-level water storage tank to monitor the liquid level inside the high-level water storage tank; the medium-level sensor is installed at the top of the medium-level water storage tank to monitor the liquid level inside the medium-level water storage tank; and the low-level sensor is installed at the top of the low-level water storage tank to monitor the liquid level inside the low-level water storage tank.

[0011] The inlet pipe has two sections. One end of the first section extends into the sea, and the other end is connected to the water pump to transport seawater to the water pump. One end of the second section of the inlet pipe is connected to the water pump, and the other end is connected to the three-way valve to transport seawater from the water pump to the three-way valve.

[0012] One end of the drain pipe is connected to a three-way valve, and the other end extends overboard to discharge seawater into the sea.

[0013] One end of the water pipe is connected to a three-way valve and the other end is connected to a low-level water storage tank. It is used to transport seawater from the three-way valve to the interior of the low-level water storage tank or from the low-level water storage tank to the three-way valve.

[0014] The three-way valve has three ports. One end is connected to the water pump through the second section of the inlet pipe, and the other end is connected to the low-level water storage tank through the water delivery pipe. The three-way valve is used to control the water pump to inject water into the low-level water storage tank, the middle-level water storage tank, and the high-level water storage tank, and also to control the water discharge from the low-level water storage tank, the middle-level water storage tank, and the high-level water storage tank to the outside. The third port of the three-way valve is connected to the drain pipe for draining water to the outside.

[0015] One end of the water pump is connected to the sea through the inlet pipe, and the other end is connected to the second section of the inlet pipe. The water pump delivers seawater to the three-way valve through the inlet pipe.

[0016] The vent is a through hole on the rotary drum. When the low-level water valve, the middle-level water valve, and the high-level water valve are opened simultaneously, the low-level water tank, the middle-level water tank, and the high-level water tank can be connected to the atmosphere, ensuring the air pressure balance inside the low-level water tank, the middle-level water tank, and the high-level water tank during water injection.

[0017] The central shaft is fixed to the ship's deck, and the rotating cylinder is rotatably connected to the central shaft via bearings. The low-level, mid-level, and high-level water tanks are all compartments inside the rotating cylinder. The high-level, mid-level, and low-level sensors are respectively installed at the top of the high-level, mid-level, and low-level water tanks. The vent is located at the top of the rotating cylinder. The high-level water valve is installed inside the vent, the mid-level water valve is installed between the high-level and mid-level water tanks, and the low-level water valve is installed between the low-level and mid-level water tanks.

[0018] The first section of the inlet pipe is connected to the sea at one end and to a water pump at the other end. The other section is connected to the water pump at one end and to a three-way valve at the other end. The water delivery pipe is connected to the three-way valve at one end and to a low-level water storage tank at the other end. The drain pipe is connected to the three-way valve at one end and extends to the outside of the ship at the other end.

[0019] When only the lower water tank needs to be filled with water:

[0020] Simultaneously open the high-level water valve, the middle-level water valve, and the low-level water valve, start the water pump to draw seawater from the sea and transport it through the inlet pipe to the three-way valve. The three-way valve opens the passage to the low-level water storage tank and closes the drainage passage to the outside of the ship, that is, water begins to be injected into the low-level water storage tank. When the low liquid level sensor detects that the low-level water storage tank is full of seawater, the low-level water valve is closed and the water pump stops working.

[0021] When only the low-level and middle-level water storage tanks need to be filled with water:

[0022] Simultaneously open the high-level water valve, the middle-level water valve, and the low-level water valve, start the water pump to draw seawater from the sea and transport it through the water inlet pipe to the three-way valve. The three-way valve opens the passage to the low-level water storage tank and closes the drainage passage to the outside of the ship, that is, water begins to be injected into the low-level water storage tank and the middle-level water storage tank. When the liquid level sensor detects that the middle-level water storage tank is full of water, the middle-level water valve is closed and the water pump stops working.

[0023] When it is necessary to fill the low-level water storage tank, the middle-level water storage tank, and the high-level water storage tank:

[0024] Simultaneously open the high-level water valve, the middle-level water valve, and the low-level water valve, start the water pump to draw seawater from the sea and transport it through the inlet pipe to the three-way valve. The three-way valve opens the passage to the low-level water tank and closes the drainage passage to the outside of the ship, thus starting to fill the low-level water tank, the middle-level water tank, and the high-level water tank with water. When the high-level sensor detects that the high-level water tank is full of water, close the high-level water valve and stop the water pump.

[0025] When a water release operation is required: simultaneously open the high-level water valve, the mid-level water valve, and the low-level water valve. Open the three-way valve to allow water to drain overboard, and close the flow path from the water pump to the low-level water tank. This will complete the water release. First, drain the seawater from the high-level water tank, then the mid-level water tank, and finally the low-level water tank. After draining, close the three-way valve, the high-level water valve, the mid-level water valve, and the low-level water valve.

[0026] Filling the low-level, mid-level, and high-level water tanks with water will cause the ship's center of gravity to rise and its center of gravity to fall. In order to avoid the negative impact on the ship's stability caused by the rise and fall of the center of gravity after the rotary sail is filled with water, it is necessary to control the amount of water in the low-level, mid-level, and high-level water tanks to ensure that the rise and fall of the ship's center of gravity are within the allowable range.

[0027] The amount of water added to the low-level, middle-level, and high-level water tanks, and the timing of its discharge, depend on the wind and wave conditions during navigation and the impact of water addition on the ship's center of gravity and center of gravity. When the low-level, middle-level, and high-level water tanks are empty, the ship's center of gravity is at position G, and the ship will heel at a certain angle due to wind and waves. At point M, the ship's center of gravity is located at point G. Since the points of application of gravity W at the center of gravity G and buoyancy Δ are not on the same vertical line, the resulting restoring moment is:

[0028] After the low-level, middle-level, and high-level water tanks are filled with water, the ship's center of gravity changes. When the ship is subjected to wind and waves, it will heel at the same angle. At this time, the gravity W′ rests at point G′, the ship's center of gravity is M′, and the resulting restoring torque is... The additional gyroscopic torque generated after the rotary sail is filled with water is M. H Gyroscopic torque refers to the resistance torque exhibited by a rotor rotating at high speed around its axis of symmetry when the axis of rotation changes its orientation in space. It is mainly related to the angular velocity and moment of inertia of the rotor. During ship navigation, the outermost linear velocity of a rotary sail can reach 40m / s to 50m / s. Therefore, filling the low-level, mid-level, and high-level water tanks with water greatly increases the moment of inertia of the rotary sail, resulting in a significant gyroscopic torque.

[0029] Water injection method: The specific water injection volume for the low-level, middle-level, and high-level water storage tanks should meet the following formula. If the low-level, middle-level, and high-level water tanks are all filled with seawater, the ship's center of gravity position G′ and its metacenter position M′ satisfy the formula... Then fill each water tank with water; if filling all three water tanks does not satisfy the formula... Then only the lower and middle water tanks are filled with water, and the ship's center of gravity position G′ and the metacenter position M′ are judged to satisfy the formula. If the conditions are still not met, then only fill the lower water tank with water, and determine whether the ship's center of gravity position G′ and the metacenter position M′ satisfy the formula. If the requirements are still not met, then there is no need to add water.

[0030] When the ship rolls at an excessive angle or other circumstances cause excessive water accumulation in the low-level, mid-level, and high-level water tanks, the ship's center of gravity becomes too high and its center of gravity drops, negatively impacting the ship's stability. This results in the following: At this time, a levitation operation is required to discharge seawater overboard. The drainage method is as follows: Seawater in the high-level plenum tanks is emptied first to ensure the ship's center of gravity and center of gravity are in the correct positions. If simply emptying the water in the high-level water storage tank is insufficient to satisfy the formula... Then, simultaneously drain the seawater from the high-level and mid-level water tanks, and determine whether the ship's center of gravity and metacenter position satisfy the formula. If all seawater is drained from both the high-level and mid-level water tanks simultaneously, and the ship's center of gravity position G′ and metacenter position M′ still do not meet the requirements of the formula... Then all the seawater in the high-level water storage tank, the middle-level water storage tank, and the low-level water storage tank will be discharged.

[0031] The water injection method proposed in this invention ensures that raising the ship's center of gravity and lowering its metacenter do not negatively impact the ship's stability. The changed positions of the ship's center of gravity G′ and metacenter M′ should always satisfy the formula... In this situation, when the ship rolls, it always generates a greater restoring moment than before the water was injected; when the ship encounters severe conditions during its journey and experiences significant rolling, it will... In this situation, the ship's rolling will generate a smaller restoring moment than before water was injected. At this moment, the increase in the ship's center of gravity and decrease in the metacenter caused by water injection into the sail may have a negative impact on the ship's stability. It is necessary to perform water release operations until the ship's center of gravity and metacenter positions satisfy the formula. Stop releasing water. This method will ensure that it always has a positive impact on the stability of the ship.

[0032] The beneficial effects of this invention are:

[0033] 1. This invention is based on the original rotary sail device. While ensuring the original propulsion function of the rotary sail, it cleverly utilizes the original space inside the rotary sail to increase the mass of the entire rotary sail, thereby increasing the rotational inertia of the rotary sail and improving the stability of the ship.

[0034] 2. The ship rotary sail device and application method with anti-roll function proposed in this invention adopts a more scientific water injection method to avoid the negative impact of the rotary sail on the stability of the ship, and ensures that the method of this invention can always increase the stability of the ship.

[0035] 3. This invention utilizes the internal space of the existing rotary sail device. The device has a simple structure, is relatively easy to implement, has low manufacturing cost, and has great practical application value. Attached Figure Description

[0036] Figure 1 Schematic diagram of this device;

[0037] Figure 2 Cross-sectional view of this device;

[0038] Figure 3 Force analysis diagram of the ship before water injection;

[0039] Figure 4 Force analysis diagram of the ship after water injection into this device;

[0040] In the attached diagram: 1. Vent; 2. High-level water valve; 3. Mid-level water valve; 4. Low-level water valve; 5. High-level water tank; 6. Mid-level water tank; 7. Low-level water tank; 8. Bearing; 9. High-level sensor; 10. Mid-level sensor; 11. Low-level sensor; 12. Drain pipe; 13. Three-way valve; 14. Water pump; 15. Central shaft; 16. Rotary drum; 17. Water delivery pipe; 18. Inlet pipe. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0042] like Figure 1The diagram shows a schematic of the device. This invention addresses the issue of ship stability during the application of rotary sails. Utilizing the hollow structure of rotary sails, it proposes a ship rotary sail device and application method with anti-roll function. This invention cleverly utilizes the internal space of the rotary sail, increasing its overall mass and thus its moment of inertia, thereby improving ship stability. The proposed anti-roll ship rotary sail and application method are simple in structure and have a low manufacturing cost, which can promote the mature application of rotary sails and has significant practical application value.

[0043] like Figure 2 The cross-sectional view of the device shown is shown below. The device includes: vent 1, high-level water valve 2, medium-level water valve 3, low-level water valve 4, high-level water tank 5, medium-level water tank 6, low-level water tank 7, bearing 8, high-level liquid level sensor 9, medium-level liquid level sensor 10, low-level liquid level sensor 11, drain pipe 12, three-way valve 13, water pump 14, central shaft 15, rotary drum 16, water delivery pipe 17, and water inlet pipe 18.

[0044] The rotating cylinder 16 is the outermost sleeve of the rotating cylinder sail. The rotating cylinder 16 is driven to rotate by a drive device installed on the ship. During the ship's navigation, the rotating cylinder 16 will have a large linear velocity. The linear velocity of the outermost part of the rotating cylinder can reach 40m / s to 50m / s. Therefore, increasing the overall mass of the rotating cylinder 16 can greatly increase the rotational inertia of the entire rotating cylinder 16.

[0045] The central shaft 15 is mounted and fixed on the ship's deck to support the rotation of the rotating cylinder 16.

[0046] There are two bearings 8, which are installed at the upper and lower ends of the central shaft 15 respectively, so that the rotating cylinder 16 and the central shaft 15 can be rotated together.

[0047] The low-level water storage tank 7, the middle-level water storage tank 6, and the high-level water storage tank 5 are all located inside the rotary cylinder 16. The low-level water storage tank 7 is located at the bottom of the rotary cylinder 16, the middle-level water storage tank 6 is located in the middle of the rotary cylinder 16, and the high-level water storage tank 5 is located at the top of the rotary cylinder 16.

[0048] The high-level sensor 9 is installed at the top of the high-level water storage tank 5 to monitor the liquid level inside the high-level water storage tank 5; the medium-level sensor 10 is installed at the top of the medium-level water storage tank 6 to monitor the liquid level inside the medium-level water storage tank 6; and the low-level sensor 11 is installed at the top of the low-level water storage tank 7 to monitor the liquid level inside the low-level water storage tank 7.

[0049] The water inlet pipe 18 includes two ends. One end of the first section extends to the sea, and the other end is connected to the water pump 14 for transporting seawater from the sea to the water pump 14. The second section has one end connected to the water pump 14 and the other end connected to the three-way valve 13 for transporting seawater from the water pump 14 to the three-way valve 13.

[0050] One end of the water supply pipe 17 is connected to the three-way valve 13 and the other end is connected to the low-level water storage tank 7. It is used to transport seawater from the three-way valve 13 to the interior of the low-level water storage tank 7, or to transport seawater from the low-level water storage tank 7 to the three-way valve 13.

[0051] One end of the drain pipe 12 is connected to the three-way valve 13, and the other end extends overboard to discharge seawater into the sea.

[0052] The three-way valve 13 has three ports. One end is connected to the water pump 14 through the second section of the inlet pipe 18, and the other end is connected to the low-level water storage tank 7 through the water delivery pipe 17. The three-way valve 13 is used to control the water pump 14 to inject water into the low-level water storage tank 7, the middle-level water storage tank 6, and the high-level water storage tank 5. The three-way valve 13 also has a third port connected to the drain pipe 12. On the other hand, it is also used to control the low-level water storage tank 7, the middle-level water storage tank 6, and the high-level water storage tank 5 to drain water out of the ship.

[0053] One end of the water pump 14 is connected to the sea through the first section of the inlet pipe 18, and the other end is connected to the second section of the water delivery pipe 17. The water pump 14 delivers seawater to the three-way valve 13 through the inlet pipe 18.

[0054] The vent 1 is a through hole on the rotary cylinder 16. When the low-level water valve 4, the middle-level water valve 3, and the high-level water valve 2 are opened at the same time, it can ensure that the low-level water storage tank 7, the middle-level water storage tank 6, and the high-level water storage tank 5 are connected to the atmosphere, thereby ensuring the air pressure balance inside the low-level water storage tank 7, the middle-level water storage tank 6, and the high-level water storage tank 5 during water injection.

[0055] The central shaft 15 is fixed to the ship's deck, and the rotating cylinder 16 is rotatably connected to the central shaft 15 via bearing 8. The low-level water tank 7, the middle-level water tank 6, and the high-level water tank 5 are all compartments inside the rotating cylinder 16. The high-level sensor 9, the middle-level sensor 10, and the low-level sensor 11 are respectively installed at the top of the high-level water tank 5, the middle-level water tank 6, and the low-level water tank 7. The vent 1 is located at the top of the rotating cylinder 16, the high-level water valve 2 is installed inside the vent 1, the middle-level water valve 3 is installed between the high-level water tank 5 and the middle-level water tank 6, and the low-level water valve 2 is installed between the low-level water tank 7 and the middle-level water tank 6. One end of the first section of the water inlet pipe 18 is connected to the sea, and the other end is connected to the water pump 14. One end of the second section is connected to the water pump 14, and the other end is connected to the three-way valve 13. One end of the water supply pipe 17 is connected to the three-way valve 13 and the other end is connected to the low-level water storage tank 7. One end of the drain pipe 12 is connected to the three-way valve 13 and the other end extends to the outside of the ship.

[0056] When only the lower water tank 7 needs to be filled with water:

[0057] At the same time, the high-level water valve 2, the middle-level water valve 3, and the low-level water valve 4 are opened to start the water pump 14 to draw seawater from the sea and transport it through the water inlet pipe 18 to the three-way valve 13. The three-way valve 13 opens the passage to the low-level water storage tank 7 and closes the drainage passage to the outside of the ship, that is, water is started to be injected into the low-level water storage tank 7. When the low liquid level sensor 11 detects that the low-level water storage tank 7 is full of water, the low-level water valve 4 is closed and the water pump 14 stops working.

[0058] When only the low-level water tank 7 and the middle-level water tank 6 need to be filled with water:

[0059] At the same time, open the high-level water valve 2, the middle-level water valve 3, and the low-level water valve 4, start the water pump 14 to draw seawater from the sea and transport it to the three-way valve 13 through the water inlet pipe 18. The three-way valve 13 opens the passage to the low-level water storage tank 7 and closes the drainage passage to the outside of the ship, that is, it begins to fill the low-level water storage tank 7 and the middle-level water storage tank 6 with water. When the liquid level sensor 10 detects that the middle-level water storage tank 6 is full of water, close the middle-level water valve 3 and the water pump 14 stops working.

[0060] When it is necessary to fill the low-level water storage tank 7, the middle-level water storage tank 6, and the high-level water storage tank 5 with water at the same time:

[0061] Simultaneously, the high-level water valve 2, the middle-level water valve 3, and the low-level water valve 4 are opened to start the water pump 14, which draws seawater from the sea and delivers it through the inlet pipe 18 to the three-way valve 13. The three-way valve 13 opens the passage to the low-level water storage tank 7 and closes the drainage passage to the outside of the ship, thus starting to fill the low-level water storage tank 7, the middle-level water storage tank 6, and the high-level water storage tank 5 with water. When the high-level sensor 9 detects that the high-level water storage tank 5 is full of water, the high-level water valve 2 is closed and the water pump 14 stops working.

[0062] When a water discharge operation is required, simultaneously open the high-level water valve 2, the mid-level water valve 3, and the low-level water valve 4. Open the three-way valve 13 to allow water to drain overboard, and close the flow path from the water pump 14 to the low-level water tank 7. The water discharge will then proceed as follows: first, drain the seawater from the high-level water tank 5, then the mid-level water tank 6, and finally the low-level water tank 7. After drainage is complete, close the three-way valve 13, the high-level water valve 2, the mid-level water valve 3, and the low-level water valve 4.

[0063] The amount of water injected into the low-level water tank 7, the middle-level water tank 6, and the high-level water tank 5, and when to drain the water, depend on the wind and wave conditions during the ship's navigation and the impact of water injection on the ship's center of gravity and center of gravity.

[0064] like Figure 3 As shown, when the low-level water tank 7, the middle-level water tank 6, and the high-level water tank 5 are not filled with water, the ship's center of gravity is at position G. At this time, the ship is heeling at a certain angle due to the wind and waves. At this point, the ship's center of buoyancy moves from point B to point B1. The line of action of the buoyancy force is perpendicular to NN1, and the ship's center of gravity is at point M. At this time, the point of application of gravity W (G) and the point of application of buoyancy Δ are not on the same vertical line. Therefore, the resulting restoring moment is:

[0065] like Figure 4 As shown, after the low-level water tank 7, the middle-level water tank 6, and the high-level water tank 5 are filled with water, the position of the ship's center of gravity and its center of gravity change. When the ship is subjected to wind and waves, it will heel by the same angle. At this time, the gravity W′ rests at point G′, the ship's center of gravity is at point M′, and the resulting restoring torque is... The additional gyroscopic torque generated after the rotary sail is filled with water is M. H The gyroscopic torque refers to the resistance torque exhibited by a rotor rotating at high speed around its axis of symmetry when the axis of rotation changes its orientation in space. It is usually called the gyroscopic torque. The gyroscopic torque is mainly related to its own angular velocity and moment of inertia. During the navigation of a ship, the outermost linear velocity of the rotary sail can reach 40m / s to 50m / s. Therefore, after water is injected into the low-level water tank 7, the middle-level water tank 6, and the high-level water tank 5, the moment of inertia of the rotary sail itself will be greatly increased, thereby generating a large gyroscopic torque.

[0066] Filling the low-level water tank 7, the middle-level water tank 6, and the high-level water tank 5 with water will cause the ship's center of gravity to rise and its center of gravity to fall. In order to avoid the negative impact on the ship's stability caused by the rise and fall of the center of gravity after filling the sail with water, it is necessary to control the amount of water filled into the low-level water tank 7, the middle-level water tank 6, and the high-level water tank 5 to ensure that the rise and fall of the ship's center of gravity are within the allowable range.

[0067] Water filling method: If the low-level water tank 7, the middle-level water tank 6, and the high-level water tank 5 are all filled with seawater, the ship's center of gravity position G′ and the metacenter position M′ will satisfy the formula Then fill the low-level water tank 7, the middle-level water tank 6, and the high-level water tank 5 with water; if the low-level water tank 7, the middle-level water tank 6, and the high-level water tank 5 are all filled with seawater, the formula will not be satisfied. Then only fill the lower water tank 7 and the middle water tank 6 with water, and determine whether the ship's center of gravity position G′ and the metacenter position M′ satisfy the formula. If the conditions are still not met, then only fill the lower-level water tank 7 with water, and determine whether the ship's center of gravity position G′ and the gimbal position M′ satisfy the formula. If the requirements are still not met, then water injection is unnecessary. Injecting water into the rotary sail will inevitably cause changes in the position of the ship's center of gravity and metacenter, but this method, by controlling the amount of water injected, ensures that the negative impact of the changes in the ship's center of gravity and metacenter caused by water injection on the ship's stability is less than the positive impact of the gyroscopic torque generated by the rotary sail on the ship's stability.

[0068] Discharge method: When the ship's roll angle is too large (roll angle is...) This can lead to excessive water accumulation in the low-level water tank 7, the middle-level water tank 6, and the high-level water tank 5, causing the ship's center of gravity to rise too high and its center of gravity to drop, negatively impacting the ship's stability. Specifically, this can result in: At this time, water needs to be released, and a water release operation is carried out. Priority is given to emptying the seawater in the high-level water storage tank 5 so that the ship's center of gravity and center of gravity satisfy the formula. If simply emptying the water in the high-level water storage tank 5 is insufficient to satisfy the formula... Simultaneously drain the seawater from the high-level water tank 5 and the mid-level water tank 6, and determine whether the ship's center of gravity G′ and the position of its center of gravity M′ satisfy the formula. If all seawater is drained from both the high-level water tank 5 and the mid-level water tank 6, and the ship's center of gravity position G′ and metacenter position M′ still do not meet the requirements of the formula... Then all the seawater in the high-level water storage tank 5, the middle-level water storage tank 6, and the low-level water storage tank 7 will be discharged.

[0069] The water injection method proposed in this invention ensures that raising the ship's center of gravity and lowering its metacenter do not negatively impact the ship's stability. After water injection, the ship's center of gravity and metacenter positions should always satisfy the formula... In this situation, when the ship rolls, it always generates a greater restoring moment than before the water was injected; when the ship encounters severe conditions during its journey and experiences significant rolling, it will... In this situation, the ship's rolling will generate a smaller restoring moment than before water was injected. At this moment, the increase in the ship's center of gravity and decrease in the metacenter caused by water injection into the sail may have a negative impact on the ship's stability. It is necessary to perform water release operations until the ship's center of gravity and metacenter positions satisfy the formula. Stop releasing water. This method, by controlling the amount of water injected, ensures that the increase in the ship's center of gravity and decrease in its center of gravity caused by water injection will not negatively affect the ship's stability, thus promoting safe navigation and having significant practical application value.

[0070] The above description is only a preferred embodiment of the present invention, but the implementation is not limited to the above embodiments. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for applying a ship's rotary sail with roll reduction function, applied to a ship's rotary sail device with roll reduction function, the device comprising: Vent hole (1), high-level water valve (2), medium-level water valve (3), low-level water valve (4), high-level water tank (5), medium-level water tank (6), low-level water tank (7), bearing (8), high-level sensor (9), medium-level sensor (10), low-level sensor (11), drain pipe (12), three-way valve (13), water pump (14), central shaft (15), swivel cylinder (16), water supply pipe (17), water inlet pipe (18); The specific calculation steps of a method for applying a ship swivel cylinder sail with anti-roll function are as follows: When the low-level water tank (7), the middle-level water tank (6), and the high-level water tank (5) are not filled with water, the center of gravity of the ship is at point G. When the ship is heeled by a certain angle φ due to wind and waves, the ship's center of gravity is at point M. Filling the sail with water will cause a change in the ship's center of gravity. The position of the ship's center of gravity during the filling process is as follows: and stable position Should always satisfy ; If the low-level water tank (7), the middle-level water tank (6), and the high-level water tank (5) are all filled with seawater, the ship's center of gravity will be at a certain position. and stable position Satisfy the formula Then fill the low-level water tank (7), the middle-level water tank (6), and the high-level water tank (5) with water; If the low-level water tank (7), the middle-level water tank (6), and the high-level water tank (5) are filled, the formula is not satisfied. Then only fill the low-level water tank (7) and the middle-level water tank (6) with water to determine the position of the ship's center of gravity. and stable position Does it satisfy the formula? ; If the formula is still not satisfied Then only fill the lower water tank (7) with water to determine the position of the ship's center of gravity. and stable position Satisfy the formula ; If the formula is still not satisfied Then no water needs to be added; When performing a water release operation, the seawater in the high-level water storage tank (5) should be drained first to lower the ship's center of gravity. and stable position Satisfy the formula ; If only the water in the high-level water storage tank (5) is drained, it cannot satisfy the formula Then, the seawater in the high-level water tank (5) and the middle-level water tank (6) needs to be emptied simultaneously to determine whether the ship's center of gravity and center of gravity satisfy the formula. ; If all the seawater in the high-level water tank (5) and the middle-level water tank (6) is discharged at the same time, the ship's center of gravity will be at a certain position. and stable position Still does not satisfy the formula Then all the seawater in the high-level water storage tank (5), the middle-level water storage tank (6), and the low-level water storage tank (7) will be discharged.

2. The application method based on claim 1, characterized in that: When only the low-level water tank (7) needs to be filled with water: simultaneously open the high-level water valve (2), the middle-level water valve (3), and the low-level water valve (4), start the water pump (14), open the passage to the low-level water tank (7) with the three-way valve (13), close the drainage passage to the outside of the ship, and close the low-level water valve (4) when the low-level water sensor (11) detects that the low-level water tank (7) is full of water, and the water pump (14) stops working; When it is necessary to fill the low-level water tank (7) and the middle-level water tank (6) with water: simultaneously open the high-level water valve (2), the middle-level water valve (3), and the low-level water valve (4), start the water pump (14), open the three-way valve (13) to the passage to the low-level water tank (7), and close the drainage passage to the outside of the ship, that is, start filling the low-level water tank (7) and the middle-level water tank (6) with water. When the liquid level sensor (10) detects that the middle-level water tank (6) is full of water, close the middle-level water valve (3) and the water pump (14) stops working. When it is necessary to fill the low-level water tank (7), the middle-level water tank (6), and the high-level water tank (5) with water at the same time: open the high-level water valve (2), the middle-level water valve (3), and the low-level water valve (4) at the same time, start the water pump (14), open the three-way valve (13) to the passage to the low-level water tank (7), and close the drainage passage to the outside of the ship, that is, start filling the low-level water tank (7), the middle-level water tank (6), and the high-level water tank (5) with water. When the high liquid level sensor (9) detects that the high-level water tank (5) is full of water, close the high-level water valve (2) and the water pump (14) stops working. When it is necessary to perform a water discharge operation, the high-level water valve (2), the middle-level water valve (3), and the low-level water valve (4) are opened at the same time. The three-way valve (13) opens the passage for water discharge to the outside of the ship and closes the passage for water pump (14) to inject water into the low-level water storage tank (7).

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