Segmented unpowered hydrofoil

Abstract

The utility model discloses a segmented type unpowered hydrofoil belongs to unpowered hydrofoil technical field, this segmented type unpowered hydrofoil, including center section, the both sides symmetry of center section are provided with wing section, one wing section is divided into two sub wing sections, when one wing section is divided into two sub wing sections, another unsegmented wing section, the sub wing section of segmentation after close center section and center section three integrally formed casting. The utility model discloses a wing section is divided into multiple sub wing sections, and the space compression rate of hydrofoil is optimized with transportation adaptability, and only one side wing section is divided into two sub wing sections can adapt small hydrofoil, and under the condition of one side wing section segmentation, just satisfy transportation demand, and two wing sections are all divided into two sub wing sections and can adapt large hydrofoil, and the length of hydrofoil is greatly reduced, satisfies transportation demand, solves the problem that traditional integral type hydrofoil is difficult to pack into conventional vehicle or air shipment box because of length limitation.

Description

Technical Field

[0001] This utility model belongs to the field of unpowered hydrofoil technology, specifically relating to a segmented unpowered hydrofoil. Background Technology

[0002] A hydrofoil is an airfoil structure that moves in water. Its core principle is based on Bernoulli's theorem and the lift generation mechanism in fluid mechanics. When a hydrofoil moves in water at a certain angle of attack, the water flow passes through its specially designed airfoil profile, creating a low-pressure area above the airfoil and a high-pressure area below, thereby generating upward lift. This lift can lift the hull or sports equipment off the water surface, significantly reducing water resistance (wave drag, friction drag, etc.), and enabling high-speed gliding or "flight".

[0003] The current mainstream hydrofoil system adopts a single continuous wingplate integral structure, consisting of the wingplate body and the bottom wing section. The wingplate and wing section are mostly made of high-strength aluminum alloy or titanium alloy, and the continuity of airfoil parameters is ensured through precision machining.

[0004] Existing hydrofoil panels are typically longer than 1.2 meters and are mostly one-piece molded structures that cannot be disassembled or folded, resulting in a large space occupation by the hydrofoil and making transportation and carrying difficult. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a segmented unpowered hydrofoil.

[0006] The technical solution adopted to solve the above technical problems is: to provide a segmented unpowered hydrofoil, including a center section, characterized in that wing sections are symmetrically arranged on both sides of the center section, when one wing section is divided into two sub-wing sections, the other undivided wing section, the sub-wing section closer to the center section after division, and the center section are integrally cast, and the two sub-wing sections are connected by a quick-release connection mechanism.

[0007] By using the above technical solution, one of the wing sections is divided into two sub-wing sections of equal length, which significantly optimizes the space compression ratio and transport adaptability of the hydrofoil. Traditional one-piece hydrofoils are difficult to fit into conventional vehicles or air cargo containers due to length limitations (usually ≥1.5 meters), while the sub-wing section design can reduce the length of a single section to 0.5 to 0.75 meters, reducing space occupation, and is especially suitable for backpack carrying or long-distance transportation in outdoor sports scenarios.

[0008] Furthermore, the maximum thickness of the sub-wing segment is located at 30%-45% of the chord length, with a leading edge radius ≤1.5mm and a trailing edge thickness ≤0.8mm.

[0009] By using the above technical solutions, the maximum thickness of the wing section is limited to 30%-45% of the chord length, the leading edge radius is ≤1.5mm, and the trailing edge thickness is ≤0.8mm. This directly optimizes the lift-to-drag ratio and stall characteristics. The maximum thickness is located in the 30%-45% chord length range, which shifts the pressure distribution peak backward, delays water flow separation, and increases the lift coefficient.

[0010] Furthermore, the quick-release connection mechanism includes a plug-in seat fixed to the end of the wing section, plug-in slots are provided at both ends of the central section, the plug-in seat is slidably inserted into the plug-in slots, and countersunk holes are provided on the top and bottom surfaces of the outer wall of the wing section, fastening bolts are inserted into the countersunk holes, and the fastening bolts are threadedly connected to the plug-in seat.

[0011] The above technical solution, by setting a sliding fit between the plug and the plug slot and double-sided fastening bolts, balances assembly efficiency and shear strength.

[0012] Furthermore, the top of the central section is provided with a mounting plate, which has mounting holes for fixing the pedal and waist-shaped holes for adjusting the mounting position.

[0013] The above technical solution allows for the installation of various models of pedals through the waist-shaped holes in the mounting plate.

[0014] Furthermore, a rubber strip is provided at the end of the wing section.

[0015] The above technical solution reduces the vibration transmission to the connecting mechanism during hydrofoil use by radially compressing and filling the gap of the connecting mechanism with rubber strips, thereby increasing the reliability of the connecting structure.

[0016] The beneficial effects of this utility model are as follows:

[0017] By dividing the wing section into multiple sub-wing sections, the space compression ratio and transport adaptability of the hydrofoil are significantly optimized. Traditional one-piece hydrofoils are difficult to fit into conventional vehicles or air cargo containers due to length limitations (usually ≥1.5 meters), while the sub-wing section design can reduce the length of a single section to 0.5 to 0.75 meters, reducing space occupation, and is especially suitable for backpack carrying or long-distance transportation in outdoor sports scenarios.

[0018] By dividing a single wing segment into two sub-wing segments, it can accommodate small hydrofoils (length ≤ 1.5m), meeting transportation requirements even with a single wing segment, and reducing subsequent assembly time. By dividing both wing segments into two sub-wing segments, it can accommodate large hydrofoils (length ≥ 1.5m), further reducing the hydrofoil length and meeting transportation requirements.

[0019] By limiting the maximum thickness of the sub-wing section to 30%–45% of the chord length, the leading edge radius to ≤1.5mm, and the trailing edge thickness to ≤0.8mm, the lift-to-drag ratio and stall characteristics are directly optimized. The maximum thickness is located in the 30%–45% chord length range (the high-efficiency range of NACA airfoils), which shifts the pressure distribution peak backward, delays water flow separation, and improves the lift coefficient. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the segmented unpowered hydrofoil of this utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of a single-side section of the segmented unpowered hydrofoil of this utility model;

[0022] Figure 3 for Figure 2 A magnified schematic diagram of the partial three-dimensional structure of A in the middle;

[0023] Figure 4 This is a three-dimensional structural diagram of the segmented unpowered hydrofoil of this utility model, showing the two-sided wing segments.

[0024] Figure 5 for Figure 4 A magnified schematic diagram of the partial three-dimensional structure of B.

[0025] Reference numerals: 1. Center section; 2. Wing section; 201. Subwing section; 3. Quick-release connection mechanism; 301. Plug-in socket; 302. Plug-in groove; 303. Fastening bolt; 4. Mounting plate; 401. Mounting hole; 402. Waist-shaped hole; 5. Rubber strip. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] Example 1, such as Figure 1-3As shown, the segmented unpowered hydrofoil of this embodiment includes a central section 1, with wing sections 2 symmetrically arranged on both sides of the central section 1. When one of the wing sections 2 is divided into two sub-wing sections 201, the other undivided wing section 2, the sub-wing section 201 closer to the central section 1 after division, and the central section 1 are integrally cast to ensure the overall strength of the hydrofoil. The two sub-wing sections 201 are connected by a quick-release connecting mechanism 3, which facilitates quick assembly and disassembly of the sub-wing sections 201. When one side of the wing section 2 is divided into two sub-wing sections 201, it can accommodate small hydrofoils with a length ≤1.5m. When one side of the wing section 2 is divided into two sub-wing sections 201, the length of the hydrofoil meets the transportation requirements. At the same time, in the subsequent assembly process, only one sub-wing section 201 needs to be assembled to quickly put the hydrofoil into use.

[0028] Example 2, as follows Figure 4-5 As shown, the difference between this embodiment and embodiment 1 is that both wing segments 2 in this embodiment can be divided into two sub-wing segments 201. At this time, the two undivided wing segments 2 and the center segment 1 are integrally cast. The two adjacent sub-wing segments 201 are connected by the same quick-release connection mechanism 3. When both sides of the wing segment 2 are divided into two sub-wing segments 201, it can be adapted to large hydrofoils with a length ≥1.5m. When both sides of the wing segment 2 are divided, the overall length of the hydrofoil can be reduced, which can fully meet the transportation requirements.

[0029] Example 3, such as Figure 1-5As shown, the quick-release connection mechanism 3 includes a connector 301 fixed to the end of the wing segment 201. Connecting slots 302 are provided at both ends of the central segment 1. The connector 301 is slidably inserted into the connecting slots 302. Countersunk holes are provided on the top and bottom surfaces of the outer wall of the wing segment 201. Fastening bolts 303 are inserted into the countersunk holes and threadedly connected to the connector 301. By abutting the two wing segments 201, the connector of the connector 301 enters the connecting slot 302, and then the bolts are tightened, the assembly of the two wing segments 201 can be quickly completed, balancing assembly efficiency and shear strength. A rubber strip 5 is provided at the end of the wing segment 201. The rubber strip 5 can radially compress and fill the gap of the connection mechanism 3, reducing... The reduced vibration transmission to the connecting mechanism 3 during hydrofoil use increases the reliability of the connecting structure. The top of the central section 1 is equipped with a mounting plate 4, which has mounting holes 401 for fixing the pedal and waist-shaped holes 402 for adjusting the installation position. The waist-shaped holes 402 of the mounting plate 4 can accommodate the installation of various types of pedals. The maximum thickness of the sub-wing section 201 is located at 30% to 45% of the chord length, with a leading edge radius ≤1.5mm and a trailing edge thickness ≤0.8mm. By limiting the maximum thickness position, leading edge radius, and trailing edge thickness of the sub-wing section 201, the lift-to-drag ratio and stall characteristics are directly optimized. The maximum thickness position is in the 30% to 45% chord length range, which shifts the pressure distribution peak backward, delays water flow separation, and increases the lift coefficient.

[0030] The working principle of this embodiment is as follows: when only one side wing segment 2 is divided into two sub-wing segments 201, the other side wing segment remains intact, and the center segment 1 and the near-terminal wing segment 201 are integrally formed, reducing steps, shortening assembly time, and meeting transportation requirements at the same time.

[0031] Both side wing sections 2 are divided into two sub-wing sections 201. The central section 1 is integrally formed with the two near-terminal wing sections 201 on both sides, with a maximum compressed length of 0.75m / section, which meets transportation requirements.

[0032] During assembly, the connector 301 at the end of the sub-wing section 201 is aligned with the connector groove 302 of the adjacent sub-wing section 201 and inserted to achieve pre-positioning and avoid angular deviation. The fastening bolt 303 is inserted through the countersunk hole on the outer wall of the sub-wing section and screwed into the threaded hole of the connector 301. It is symmetrically locked on both sides to ensure shear strength. At this time, the rubber strip 5 is embedded in the gap at the connection, filling the gap, reducing vibration transmission, and enhancing the reliability of the connection structure. Then, the pedal base is aligned with the waist-shaped hole 402 of the mounting plate 4 and fixed with bolts. The hydrofoil can then be used.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A segmented unpowered hydrofoil, comprising a central section (1), characterized in that, The central section (1) is symmetrically provided with wing sections (2) on both sides. One of the wing sections (2) is divided into two sub-wing sections (201). When one of the wing sections (2) is divided into two sub-wing sections (201), the other undivided wing section (2), the sub-wing section (201) closer to the central section (1) after division and the central section (1) are integrally cast. The two sub-wing sections (201) are connected by a quick-release connection mechanism (3).

2. The segmented unpowered hydrofoil according to claim 1, characterized in that, The maximum thickness of the sub-wing section (201) is located at 30% to 45% of the chord length, with a leading edge radius ≤ 1.5 mm and a trailing edge thickness ≤ 0.8 mm.

3. The segmented unpowered hydrofoil according to claim 2, characterized in that, The quick-release connection mechanism (3) includes a plug seat (301) fixed to the end of the wing section (201). The two ends of the center section (1) are provided with plug grooves (302). The plug seat (301) and the plug groove (302) are slidably inserted into each other. The top and bottom surfaces of the outer wall of the wing section (201) are provided with countersunk holes. Fastening bolts (303) are inserted into the countersunk holes. The fastening bolts (303) are threadedly connected to the plug seat (301).

4. The segmented unpowered hydrofoil according to claim 3, characterized in that, The top of the central section (1) is provided with a mounting plate (4), and the mounting plate (4) is provided with mounting holes (401) for fixing the pedal and waist-shaped holes (402) for adjusting the mounting position.

5. The segmented unpowered hydrofoil according to claim 4, characterized in that, A rubber strip (5) is provided at the end of the sub-wing section (201).

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