Attack angle adjustable hydrofoil ship

Abstract

The embodiment of the invention provides an attack-angle-adjustable hydrofoil ship which comprises a ship body, the ship body comprises a cabin and a supporting frame, a cavity is formed in the cabin, the supporting frame is fixedly connected with the cabin, and at least part of the supporting frame is arranged outside the cavity; the connecting rod is rotationally connected to the supporting frame and rotates around the axial direction of the connecting rod, and the axial direction of the connecting rod is perpendicular to the advancing direction of the ship body; the rotating rear wing is detachably and fixedly connected to the connecting rod; and the driving device is used for driving the connecting rod to rotate so as to adjust the attack angle of the rotating rear wing. The attack angle adjustable hydrofoil ship can better adapt to different navigation environments.

Description

Technical Field

[0001] This application relates to the technical field of ships, and particularly to a hydrofoil boat with adjustable angle of attack. Background Art

[0002] In the prior art, the hydrofoil technology is a fundamental method to reduce the resistance suffered by waterborne ships. Compared with ordinary non-hydrofoil boats, this technology can reduce the overall resistance of the ship by up to 80%. This is almost impossible to achieve with any other technology used to reduce the resistance of planing boats. Hydrofoil boats use the buoyancy provided by hydrofoils to plane on the water surface. Planing on the water surface will result in a reduction in the wetted surface area of the ship, thereby reducing hydrodynamic resistance and enabling the ship to sail at a higher speed. Compared with traditional boats, it has higher sailing efficiency. This means that maritime transportation can be carried out more quickly, improving the transportation efficiency of goods and personnel. There are two common types of hydrofoils for hydrofoil boats: semi-submerged hydrofoils and fully submerged hydrofoils. Early hydrofoil boats generally adopted a hydrofoil system with a fixed angle of attack. The core design features included a rigid connection structure: the hydrofoil was rigidly fixed to the support frame by welding or bolts, and the airfoil angle was set once during installation and the angle of attack of the hydrofoil could not be dynamically adjusted. The static hydrodynamics design optimized the airfoil parameters based on a specific cruising speed, and the preset angle of attack matched the ideal working conditions. However, in the actual use environment, with external factors such as the hydrological environment, a fixed and single hydrofoil cannot better adapt to different environments. Therefore, a hydrofoil boat with an adjustable angle of attack is needed to better adapt to different sailing environments. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a hydrofoil boat with an adjustable angle of attack, which can better adapt to different sailing environments.

[0004] A hydrofoil boat with an adjustable angle of attack according to an embodiment of the present invention includes: a hull, the hull includes a cabin and a support frame, a chamber is provided in the cabin, the support frame is fixedly connected to the cabin, and at least a part of the support frame is disposed outside the chamber; a connecting rod, the connecting rod is rotatably connected to the part of the support frame outside the chamber and rotates around the axial direction of the connecting rod, and the axial direction of the connecting rod is perpendicular to the advancing direction of the hull; a rotating rear hydrofoil, the rotating rear hydrofoil is detachably fixedly connected to the connecting rod; a driving device, the driving device is used to drive the connecting rod to rotate so as to adjust the angle of attack of the rotating rear hydrofoil.

[0005] An angle-of-attack adjustable hydrofoil boat according to an embodiment of the present invention has at least the following beneficial effects: By providing a connecting rod, the rotation of the connecting rod can drive the rotation of the rotating rear wing, so that the angle of attack of the rotating rear wing can be adjusted by the rotation of the connecting rod. Thus, not only can the rotating rear wing better adapt to the navigation environment, but also the navigation attitude of the hull can be adjusted by changing the angle of attack of the rotating rear wing. In addition, after providing the connecting rod, the rotating rear wing can be conveniently disassembled and replaced on the connecting rod, so that the angle-of-attack adjustable hydrofoil boat can better adapt to different navigation environments by replacing different rotating rear wings.

[0006] According to some embodiments of the present invention, the connecting rod includes a first rod and a second rod, the rotating rear wing includes a left rear wing and a right rear wing, the first rod and the second rod are respectively arranged on both sides of the support frame, one end of the first rod is rotatably connected to the support frame, the left rear wing is arranged at the other end of the first rod, one end of the second rod is rotatably connected to the support frame, and the right rear wing is arranged at the other end of the second rod.

[0007] According to some embodiments of the present invention, the angle-of-attack adjustable hydrofoil boat further includes a power device for driving the movement of the hull, and the power device is fixedly arranged on the support frame.

[0008] According to some embodiments of the present invention, the angle-of-attack adjustable hydrofoil boat further includes a front wing, and the extending direction of the front wing is parallel to the axial direction of the connecting rod.

[0009] According to some embodiments of the present invention, a connecting block is arranged on the support frame, and the front wing is rotatably arranged on the connecting block.

[0010] According to some embodiments of the present invention, a chute is arranged on the support frame, the chute extends along the height direction of the hull, and the connecting block is slidably arranged in the chute.

[0011] According to some embodiments of the present invention, the angle-of-attack adjustable hydrofoil boat further includes a torsion spring, one end of the torsion spring is fixed on the connecting block, the other end of the torsion spring is fixed on the front wing, and the torsion spring is used to reset the angle of attack of the front wing.

[0012] According to some embodiments of the present invention, at least two limiting blocks are further arranged on the connecting block to limit the rotation angle of the front wing, and the front wing is arranged between the two limiting blocks.

[0013] According to some embodiments of the present invention, the support frame is arranged on the lower side of the cabin, the support frame includes a keel and side plates, the keel is arranged along the advancing direction of the hull, and the side plates are fixedly arranged on the keel and fit on the lower side of the cabin.

[0014] According to some embodiments of the present invention, the rotatable rear wing is spaced apart from the hull.

[0015] According to some embodiments of the present invention, the rotatable rear wing is disposed on the lower side of the hull.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural view of the exterior of a hydrofoil boat with adjustable angle of attack according to the present invention; Figure 2 is a schematic structural view of the support frame of a hydrofoil boat with adjustable angle of attack according to the present invention; Figure 3 is an exploded structural view of a hydrofoil boat with adjustable angle of attack according to the present invention.

[0018] Reference Numerals in the Drawings: 1, hull; 11, cabin; 12, support frame; 13, keel; 14, side plate; 2, connecting rod; 21, first rod; 22, second rod; 3, power device; 4, rotatable rear wing; 41, left rear wing; 42, right rear wing; 5, front wing; 6, connecting block; 7, servo motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for facilitating the description of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0021] In the description of the present invention, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0023] By utilizing the principles of hydrodynamics, hydrofoils liberate ships from the bondage of the water surface, endowing them with unprecedented speed and stability. When a ship is driven by a propeller and travels through the water surface at high speed, the hydrofoils are immersed in the water. Their unique airfoil design causes the water flow to form a speed difference on the upper and lower surfaces of the hydrofoils. According to Bernoulli's law, the side with a faster speed has a lower pressure, and the side with a slower speed has a higher pressure, thus generating an upward lift force on the hydrofoils. As the ship speed continues to increase, this lift force is sufficient to lift the hull out of the water surface, enabling the ship to "fly" on the water surface, greatly reducing the resistance of the water to the hull. Therefore, the ship can move forward at an astonishing speed, and at the same time, the impact of waves on the hull is significantly reduced, making the navigation smoother. The shape of the hydrofoil is the key to its performance. Different airfoils, such as U-shaped, T-shaped, L-shaped, V-shaped, S-shaped, C-shaped, Y-shaped, O-shaped, E-shaped, etc., each have unique lift and drag characteristics. Parameters such as the size, thickness, and airfoil of the hydrofoil will all affect its performance in water. For example, in a well-designed hydrofoil, the curve of its upper surface and the curve shape of its side can ensure that the water flow can flow smoothly when sailing at high speed, thereby generating the maximum lift and the minimum drag. However, an inappropriate airfoil design may cause the water flow to separate and generate turbulence, thereby reducing the lift and increasing the drag. The angle of attack, that is, the angle between the hydrofoil and the water flow direction, is another important factor affecting the performance of the hydrofoil. During navigation, appropriately adjusting the angle of attack can optimize the performance of the ship. Under normal navigation conditions, moderately increasing the angle of attack can increase the lift, but at the same time, it will also bring more drag. However, if the angle of attack is too large, the hydrofoil may enter a stall state, at which time the lift will drop sharply while the drag will increase sharply, resulting in a serious impact on the maneuverability and speed of the ship. Therefore, the design and adjustment of the hydrofoil need to be very precise to ensure the best performance under various navigation conditions. In practical applications, ship engineers will carefully design the shape and angle of attack of the hydrofoil according to factors such as the use of the ship, the expected navigation speed, stability requirements, and drag limitations. For example, high-speed yachts or racing boats may adopt a more radical hydrofoil design to pursue extreme speed and performance; while cargo ships or yachts may pay more attention to stability and comfort, so they will choose a more conservative hydrofoil design. Through this meticulous design, the ship can maintain high speed while ensuring safety and efficiency, bringing a brand-new experience to navigation.

[0024] Refer to Figure 1 、 Figure 2 and Figure 3, a waterwing boat with adjustable angle of attack according to an embodiment of the first aspect of the present invention includes: a hull 1, a connecting rod 2, a driving device, and a rotating rear wing 4. The hull 1 includes a cabin 11 and a support frame 12. A chamber is provided inside the cabin 11. The support frame 12 is fixedly connected to the cabin 11, and at least a part of the support frame 12 is arranged outside the chamber. The connecting rod 2 is rotatably connected to the part of the support frame 12 located outside the chamber and rotates around the axis of the connecting rod 2. The axis of the connecting rod 2 is perpendicular to the advancing direction of the hull 1. The rotating rear wing 4 is detachably and fixedly connected to the connecting rod 2. The driving device is used to drive the connecting rod 2 to rotate so as to adjust the angle of attack of the rotating rear wing 4. A chamber is provided in the cabin 11 of the hull 1, so that the hull 1 can provide buoyancy. The support frame 12 arranged outside the cabin 11 can provide strong support for the cabin 11, so that the hull 1 has strong structural strength. In addition, by arranging a part of the support frame 12 outside the chamber of the cabin 11, the airtightness of the cabin 11 is not damaged when the connecting rod 2 is arranged, so that the cabin 11 can be prevented from leaking. Especially, the connecting rod 2 needs to rotate to adjust the angle of attack of the rotating rear wing 4. If the connecting rod 2 passes through the chamber of the cabin 11, the airtightness of the cabin 11 is very likely to be affected when the connecting rod 2 rotates. After the support frame 12 is arranged and the connecting rod 2 is rotatably arranged on the part of the support frame 12 located outside the chamber, the angle of attack of the rotating rear wing 4 can be changed by rotating the connecting rod 2 without affecting the airtightness of the cabin 11. The driving device provided to drive the connecting rod 2 to rotate can use various motors such as a stepper motor or a servo motor to accurately adjust the angle of attack of the rotating rear wing 4.

[0025] In order to adapt to more hydrological environments, the rotating rear wing 4 is detachably arranged on the connecting rod 2, which is convenient for the ship to replace a more suitable rotating rear wing 4 in different hydrological environments. The specific detachable connection method between the rotating rear wing 4 and the connecting rod 2 can be threaded connection, snap connection, flange connection, expansion sleeve connection, key and pin connection, etc. Specifically, for threaded connection, external threads can be machined at the end of the connecting rod 2, connection holes can be opened on the rotating rear wing 4 and internal threads can be provided, and it can be fixed by rotating and tightening. At the same time, gaskets can be arranged on the rotating rear wing 4 to prevent loosening. For snap connection, hooks can be arranged on the connecting rod 2, and rings or grooves can be arranged on the rotating rear wing 4. The detachable fixed connection can also be realized by tightening the hook on the ring or groove.

[0026] Furthermore, a steering gear 7 needs to be provided on the hull 1. The function of the steering gear 7 on a ship is to control the ship's course, that is, to maintain or dynamically change the ship's sailing direction according to the intentions of the crew or a pre-designed route map, so that the ship can safely reach its destination. The function of the steering gear 7 on a ship is equivalent to that of an automobile steering wheel and its connected steering mechanism. Specifically, the steering gear 7 changes the direction of the hull by controlling the deflection angle of the rudder blade at the stern and utilizing the reaction force generated by the rudder blade on the water flow, so as to achieve the purpose of changing the course. The stability and maneuverability of the ship's course are the two main functions of the steering gear 7 system. The ship should sail in a straight line so as to reach the destination quickly and reduce energy consumption. However, the ship will inevitably deviate from its original course due to external forces (such as waves, sea winds, ocean currents) during straight-line sailing. When the interference is eliminated, the ability to maintain the ship's predetermined course is the stability of the course; maneuverability refers to the ability to control the ship's course and speed in a timely manner in case of emergencies or when sailing in a restricted waterway (such as inland rivers or entering and leaving ports, etc.). More specifically, the steering gear 7 is arranged on the lower side of the rotating rear wing 4. During the sailing of the ship, the rotating rear wing 4 will provide a large lift force in the water. Arranging the steering gear 7 on the lower side of the rotating rear wing 4 can better ensure that the steering gear 7 is immersed in the water, and thus can better control the traveling direction of the ship.

[0027] According to some embodiments of the present invention, the connecting rod 2 includes a first rod 21 and a second rod 22, the rotatable rear wing 4 includes a left rear wing 41 and a right rear wing 42, the first rod 21 and the second rod 22 are respectively arranged on both sides of the support frame 12, one end of the first rod 21 is rotatably connected to the support frame 12, the left rear wing 41 is arranged at the other end of the first rod 21, one end of the second rod 22 is rotatably connected to the support frame 12, and the right rear wing 42 is arranged at the other end of the second rod 22. The rotatable rear wing 4 is divided into a left rear wing 41 and a right rear wing 42 and arranged on the left and right sides of the hull 1. By respectively driving the left rear wing 41 and the right rear wing 42 to rotate independently through the first rod 21 and the second rod 22, the angle of attack of the left rear wing 41 and the angle of attack of the right rear wing 42 can be independently adjusted, so that the left rear wing 41 and the right rear wing 42 can provide different lift forces, which can not only better adjust the attitude of the hull 1, but also greatly reduce the turning radius of the ship. When the hull is in an inclined state, its structure may be deformed or even damaged due to uneven loads. Especially under the action of alternating cyclic loads, the hull structure may be at risk of being torn due to lateral skew. Such structural damage not only affects the navigation safety of the ship, but may also cause serious economic losses. The inclination of the hull directly affects the stability of the ship. Stability is an important ability of the ship to resist external forces and maintain a balanced state. When the hull is inclined, the stability will decrease, and the ship is more likely to have a situation where the inclination angle exceeds the critical value and cannot be restored under the action of external forces such as wind and waves, thus triggering a capsizing accident. A capsizing accident will not only cause losses to the ship and the cargo, but may also pose a serious threat to the lives of the crew. The inclination of the hull may also affect the navigation performance of the ship, such as the speed, course stability, etc. The inclined hull may cause a decrease in the rudder effect, making it difficult for the ship to maintain a stable course during navigation. In addition, the inclined hull may also increase the risk of collision between the ship and other objects (such as bridges, docks, etc.), further exacerbating the hidden dangers of navigation safety. Specifically, when the hull 1 inclines to the left, by increasing the angle of attack of the left rear wing 41 to increase the lift of the left rear wing 41, and at the same time adjusting the angle of attack of the right rear wing 42 to reduce the lift of the right rear wing 42, the inclination of the hull 1 can be corrected.

[0028] According to some embodiments of the present invention, the angle-of-attack adjustable hydrofoil ship further includes a power device 3, and the power device 3 is used to drive the hull 1 to move. The power device 3 is fixedly arranged on the support frame 12. After the power device 3 provides thrust to the hull 1, the hull 1 moves along the navigation direction. During the movement of the hull 1, rotation will provide a large lift force. Therefore, the components above the rotatable rear wing 4 may be lifted above the water surface by the rotatable rear wing 4. Some of the power devices 3 provide power by being arranged in the water. By arranging the power device 3 under the rotatable rear wing 4, it can better ensure that the power device 3 is immersed in the water, so as to provide more stable power for the hull 1.

[0029] According to some embodiments of the present invention, the angle-of-attack adjustable hydrofoil ship further includes a front wing 5, and the extending direction of the front wing 5 is parallel to the axial direction of the connecting rod 2. By providing the front wing 5, not only can a greater lift be provided for the hull 1, but also the attitude of the hull 1 can be better adjusted. When only the rotatable rear wing 4 is provided, the hull 1 is prone to tilt in the front-rear direction, while after the front wing 5 is provided, the hull 1 is more likely to reach balance.

[0030] According to some embodiments of the present invention, a connecting block 6 is provided on the support frame 12, and the front wing 5 is rotatably provided on the connecting block 6. After the front wing 5 is provided to be rotatably connected, the front wing 5 can rotate along with the direction of the water flow, so as to automatically adjust the angle of attack of the front wing 5 according to the direction of the water flow, thereby better adapting to the change of the water flow.

[0031] According to some embodiments of the present invention, a chute is provided on the support frame 12, the chute extends along the height direction of the hull 1, and the connecting block 6 is slidably provided in the chute. By driving the connecting block 6 to slide along the chute, not only can the force-bearing position of the hull 1 be adjusted to change the attitude of the hull 1, but also the distance between the front wing 5 and the rotatable rear wing 4 in the height direction of the hull 1 can be adjusted, so as to change the cooperation between the front wing 5 and the rotatable rear wing 4, thereby not only making the hull 1 more stable during navigation, but also better providing lift for the hull 1.

[0032] According to some embodiments of the present invention, the angle-of-attack adjustable hydrofoil ship further includes a torsion spring, one end of the torsion spring is fixed on the connecting block 6, and the other end of the torsion spring is fixed on the front wing 5, and the torsion spring is used to reset the angle of attack of the front wing 5. Under the action of the water flow, the angle of attack of the front wing 5 will change. In order to prevent the front wing 5 from rotating too much under the action of the water flow or gravity, a torsion spring is provided. When the rotation angle of the front wing 5 is too large, the angle of attack of the front wing 5 is adjusted to the direction of the forward movement of the hull 1.

[0033] According to some embodiments of the present invention, at least two limiting blocks are further provided on the connecting block 6 to limit the rotation angle of the front wing 5, and the front wing 5 is provided between the two limiting blocks. By providing the limiting blocks to limit the rotation angle of the front wing 5, the rotation angle of the front wing 5 is prevented from being too large.

[0034] According to some embodiments of the present invention, the support frame 12 is disposed on the lower side of the cabin 11. The support frame 12 includes a keel 13 and side plates 14. The keel 13 is disposed along the advancing direction of the hull 1, and the side plates 14 are fixedly disposed on the keel 13 and attached to the lower side of the cabin 11. After the keel 13 and the side plates 14 are provided, the support of the support frame 12 for the cabin 11 is more uniform, avoiding uneven local stress on the cabin 11. Especially when the rotating rear wing 4 and the front wing 5 provide a large lift force, the rotating rear wing 4 and the front wing 5 can be both disposed on the keel 13. First, the lift force is transmitted to the keel 13, and then evenly transmitted to each part of the cabin 11 through a plurality of side plates 14.

[0035] According to some embodiments of the present invention, the rotating rear wing 4 is spaced from the hull 1. This avoids interference and damage caused by the rotation of the hull 1 and the rotating rear wing 4 when the angle of attack of the rotating rear wing 4 is changed.

[0036] According to some embodiments of the present invention, the rotating rear wing 4 is disposed on the lower side of the hull 1. Disposing the rotating rear wing 4 on the lower side can make the depth of the rotating rear wing 4 in the water deeper, so that more lift force can be provided to reduce the draft of the hull 1.

[0037] In the description of the present invention, the description of reference terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A hydrofoil boat with adjustable angle of attack, characterized in that, Comprising: A hull, the hull including a cabin and a support frame, a chamber being provided in the cabin, the support frame being fixedly connected to the cabin, and at least a part of the support frame being provided outside the chamber; A connecting rod, the connecting rod being rotatably connected to the part of the support frame located outside the chamber and rotating about the axial direction of the connecting rod, the axial direction of the connecting rod being perpendicular to the advancing direction of the hull; A rotatable rear wing, the rotatable rear wing being detachably and fixedly connected to the connecting rod; A driving device, the driving device being used to drive the connecting rod to rotate so as to adjust the angle of attack of the rotatable rear wing.

2. The angle-of-attack adjustable hydrofoil boat according to claim 1, characterized in that The connecting rod includes a first rod and a second rod, the rotatable rear wing includes a left rear wing and a right rear wing, the first rod and the second rod are respectively arranged on two sides of the support frame, one end of the first rod is rotatably connected to the support frame, the left rear wing is arranged at the other end of the first rod, one end of the second rod is rotatably connected to the support frame, and the right rear wing is arranged at the other end of the second rod.

3. The angle-of-attack adjustable hydrofoil boat according to claim 1, characterized in that, The angle-of-attack adjustable hydrofoil boat further includes a power device, the power device being used to drive the hull to move, and the power device being fixedly arranged on the support frame.

4. The adjustable angle of attack hydrofoil boat according to claim 1, characterized in that, The angle-of-attack adjustable hydrofoil boat further includes a front wing, and the extending direction of the front wing is parallel to the axial direction of the connecting rod.

5. The angle-of-attack adjustable hydrofoil boat according to claim 4, characterized in that A connecting block is arranged on the support frame, and the front wing is rotatably arranged on the connecting block.

6. The angle-of-attack adjustable hydrofoil boat according to claim 5, characterized in that, A chute is arranged on the support frame, the chute extending along the height direction of the hull, and the connecting block is slidably arranged in the chute.

7. The adjustable angle-of-attack hydrofoil boat according to claim 5, characterized in that, The angle-of-attack adjustable hydrofoil boat further includes a torsion spring, one end of the torsion spring being fixed on the connecting block, the other end of the torsion spring being fixed on the front wing, and the torsion spring being used to reset the angle of attack of the front wing.

8. The adjustable angle of attack hydrofoil boat according to claim 5, characterized in that, At least two limiting blocks are further arranged on the connecting block to limit the rotation angle of the front wing, and the front wing is arranged between the two limiting blocks.

9. The angle-of-attack adjustable hydrofoil boat according to claim 1, characterized in that, The support frame is arranged on the lower side of the cabin, the support frame including a keel and side plates, the keel being arranged along the advancing direction of the hull, and the side plates being fixedly arranged on the keel and fitting on the lower side of the cabin.

10. The angle-of-attack adjustable hydrofoil ship according to claim 1, characterized in that, The rotatable rear wing is arranged at an interval from the hull.

11. The angle-of-attack adjustable hydrofoil ship according to claim 10, characterized in that, The rotatable rear wing is arranged on the lower side of the hull.

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