Wind resistance reducing device of cylinder with round bottom and outdoor device applying wind resistance reducing device

Abstract

The utility model discloses a wind resistance reducing device of a round-bottom cylinder, which comprises the round-bottom cylinder, a plurality of sections of streamline guide plates which can rotate freely relative to the round-bottom cylinder and have water-drop-shaped cross sections are sleeved outside the round-bottom cylinder, the cross sections of the streamline guide plates are water-drop-shaped, and each streamline guide plate is formed by combining a part A and a part B which are detachably connected, after the part A and the part B are combined, a cavity which is coaxial with the round-bottom cylinder and is the same as the round-bottom cylinder in shape is formed in the part A and the part B, and the hole diameter of the cavity is larger than the outer diameter of the round-bottom cylinder. The multi-section detachable streamline guide plate capable of freely rotating around the round bottom cylinder is arranged, the section of the streamline guide plate is arranged to be in a water drop shape with the wind resistance coefficient being only 0.04, the direction can be adjusted in real time along with the wind direction so as to keep the minimum wind resistance, and the device has the advantages of being simple in structure, convenient to transport and install and wide in application range. The utility model further discloses an outdoor device using the device, and the outdoor device has the advantages of being high in overall wind resistance, low in structural strength requirement, low in manufacturing and transportation cost and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluid drag reduction, and particularly relates to a round-bottomed cylindrical wind resistance reduction device and an outdoor device using the wind resistance reduction device. The outdoor device includes a wind turbine, a cable-stayed bridge, a high-altitude power generation device, and the like. Background Art

[0002] The round-bottomed cylinder has the advantages of easy processing, easy assembly, and low wind resistance coefficient. It is a commonly used shape in various fields, especially in outdoor devices. Setting the pole body as a round-bottomed cylinder can effectively reduce the wind resistance caused by uncertain wind direction. For example, the main pole of a wind turbine, flagpole, columns and cables of a cable-stayed bridge, high-voltage cables, and mooring ropes in high-altitude power generation technology are mostly cylindrical or have a cylindrical appearance.

[0003] However, although the round-bottomed cylinder can reduce wind resistance, its wind resistance coefficient is still 0.47, and it will still be subject to large wind resistance in actual outdoor applications. For the sake of safety and durability, it is necessary to overcome this resistance. The commonly used treatment methods are: using materials with greater rigidity, using solid column structures, increasing wall thickness, or setting reinforcing ribs in the round-bottomed cylinder to increase the structural strength of the design, but these usually increase the cost of making the round-bottomed cylinder, increase its own weight, and further increase the transportation, installation costs and difficulty, which is very inconvenient. Based on this, although the main pole of the wind turbine is set as a truncated cone-shaped column, it is still necessary to use materials with better strength to make a thick main pole, and strengthen the main pole with reinforcing ribs and other strengthening structures. The overall weight is large, the material consumption is high, and the transportation and installation difficulty and cost are high; for example, the cable-stayed bridge uses more steel cables, and most of the bridge bodies are on the sea or in mid-air, with a large windward surface, large accumulated wind resistance, and easy shaking of the bridge body. In addition, if a high-altitude power generation device tows a high-altitude aircraft through a tethered rope, the tethered rope moves with the aircraft. The faster the speed, the greater the resistance the tethered rope encounters and the more energy is consumed. Therefore, how to reduce the resistance of the rope has become one of the important research topics in high-altitude power generation technology. Utility Model Content

[0004] The purpose of the utility model is to provide a wind resistance reducing device for a round bottom cylinder, which has the characteristics of greatly reducing the wind resistance of the round bottom cylinder, being able to cope with the wind resistance in uncertain directions caused by uncertain wind directions, and having a wide range of uses;

[0005] The utility model also aims to propose an outdoor device using the wind resistance reducing device, which can be a wind turbine, a cable-stayed bridge and a high-altitude power generation device, and has the characteristics of strong wind resistance resistance, material saving, low dead weight, and low rigid structure strength requirements.

[0006] The utility model is realized by the following technical solutions:

[0007] The utility model proposes a wind resistance reduction device of a round-bottom cylinder, the structure of which includes a round-bottom cylinder, a streamlined deflector is arranged on the outer shell of the round-bottom cylinder, the streamlined deflector can rotate freely relative to the round-bottom cylinder, the cross section of the streamlined deflector is in the shape of a water drop, the streamlined deflector is composed of a part A and a part B, and a cavity coaxial with the round-bottom cylinder and having the same shape as the round-bottom cylinder is formed inside the part A and the part B after being combined, and the aperture of the cavity is larger than the outer diameter of the round-bottom cylinder;

[0008] Based on the above technical features, by arranging a freely rotatable streamlined guide plate outside the round-bottom cylinder, the wind resistance resistance of the round-bottom cylinder can be greatly improved, which is beneficial to improving the stability of the round-bottom cylinder outdoors and reducing the structural strength requirements of the outdoor round-bottom cylinder.

[0009] Furthermore, bearing bushes are provided at both ends of the cavity, and the bearing bushes connect the streamlined guide plate and the round bottom cylinder to reduce the friction force when the two rotate relative to each other, and the bearing bushes are split bearing bushes for easy installation;

[0010] Further, the A part is a semi-cylinder coaxial with the round-bottom cylinder, and the B part is a mirror-symmetrical arc-shaped plate, and the arc-shaped plates intersect on a side away from the A part to facilitate the processing of each part;

[0011] Furthermore, the A part and the B part are detachably connected to facilitate the installation of the streamlined deflector and its application to an installed outdoor round-bottomed cylinder, the detachable connection is a bolt locking structure, and at least one group of mounting holes are relatively opened on the A part and the B part, and the mounting holes are used to embed mounting bolts;

[0012] Preferably, a cover is provided at the opening of the mounting hole, and after the cover closes the mounting hole, it is flush with the surface of the streamlined deflector to reduce the additional wind resistance caused by opening the mounting hole;

[0013] Furthermore, the streamlined deflector is made of a lightweight material, which is a lightweight metal alloy, a carbon fiber composite material or a polymer foam material, so as to realize a lightweight design of the streamlined deflector;

[0014] Furthermore, the streamlined guide plate is composed of several sections, and several limiting structures are arranged at intervals on the round bottom cylinder, and the streamlined guide plate is arranged between two adjacent limiting structures; the design of the multi-section streamlined guide plate can make the streamlined guide plate easy to process, transport and install, and is also more conducive to fitting the round bottom cylinder, especially the truncated cone cylinder, and has a wider applicability. The design of the limiting structure can make it difficult for adjacent streamlined guide plates to interfere with each other when rotating;

[0015] Preferably, the limiting structure is a limiting block protruding from the round-bottom cylinder, and the protruding height of the limiting block is greater than the gap width between the outer diameter of the round-bottom cylinder and the cavity;

[0016] Preferably, the limiting structure is a limiting ring tightly fastened on the round-bottom cylinder, and the ring width of the limiting ring is larger than the gap width between the outer diameter of the round-bottom cylinder and the cavity.

[0017] The utility model also proposes an outdoor device, wherein a round-bottom cylinder of the outdoor device is provided with a wind resistance reducing device of the round-bottom cylinder as described in any one of the above;

[0018] Preferably, the outdoor device is a wind turbine, and a wind resistance reducing device of a round-bottom cylinder described in any one of the above is provided on the main pole of the wind turbine.

[0019] Preferably, the outdoor device is a cable-stayed bridge, and the steel cables and cylindrical columns of the cable-stayed bridge are provided with any of the aforementioned round-bottom cylinder wind resistance reducing devices.

[0020] Preferably, the outdoor device is a high-altitude power generation device, which includes a mooring rope and an aircraft disposed at the end thereof, and the mooring rope is provided with any of the aforementioned round-bottomed cylindrical wind resistance reducing devices.

[0021] Beneficial Effects

[0022] One of the above technical solutions has the following advantages or beneficial effects:

[0023] 1) By providing a streamlined deflector that can rotate freely around the round-bottomed cylinder, and the streamlined deflector is a water drop-shaped cross-section, the wind resistance coefficient is reduced from 0.47 to 0.04. Although the windward cross-section of the installed streamlined deflector is slightly larger than that of the cylinder, the wind resistance of the round-bottomed cylinder can still be greatly reduced (about one-tenth of the original), and the direction can be adjusted in real time according to the wind direction to maintain the minimum wind resistance. The round-bottomed cylinder using the drag reduction device has the characteristics of strong wind resistance resistance, low structural strength requirements, material saving, low deadweight, low cost, and easy transportation. 2) By setting the streamlined deflector as a multi-stage and detachable structure, it can be split into small sections for transportation and installation, and can be applied to the round-bottomed cylinder that has been used in outdoor installations, it has the characteristics of easy manufacturing, convenient transportation, simple installation, and wide applicability.

[0024] 3) By arranging a wind resistance reduction device of a round bottom cylinder on the main pole of the wind turbine, the structural strength requirement of the main pole of the wind turbine can be reduced, and the thickness required for the main pole and the material stiffness can be reduced, thereby having the advantages of saving material costs, transportation costs and reducing installation difficulty;

[0025] 4) By arranging a round-bottomed cylinder-shaped wind resistance reduction device on the steel cables and cylindrical columns of the cable-stayed bridge, in addition to the effect described in (3), the air resistance on the steel cables can be effectively reduced, the swing amplitude of the cables can be reduced, and the overall stability of the bridge can be improved;

[0026] 5) By installing a column-shaped wind resistance reducing device on the mooring rope of the high-altitude power generation device, the air resistance of the mooring rope when it moves with the aircraft can be effectively reduced, thereby increasing the flight speed and altitude of the aircraft and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0029] Figure 2 It is a cross-sectional schematic diagram of a single set of streamlined guide plates of the utility model;

[0030] Figure 3 For the utility model Figure 2 Schematic diagram of the AA section structure;

[0031] In the figure: a round-bottom cylinder 1; a streamlined guide plate 2; a portion A 21; a portion B 22; a cavity 23; a bolt locking structure 24; a mounting hole 241; a bolt 242; a cover 243; a bearing bush 3; and a limit ring 4. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the embodiments, but the implementation manner of the present invention is not limited thereto.

[0033] Embodiment 1

[0034] The present embodiment discloses a wind resistance reduction device of a round-bottom cylinder, the structure of which includes a round-bottom cylinder 1, wherein the round-bottom cylinder 1 refers to a cylinder with a round bottom surface, including a round cylinder and a truncated cone-shaped cylinder; a streamlined deflector 2 is provided on the outer shell of the round-bottom cylinder 1, preferably, the streamlined deflector 2 is made of a lightweight material to achieve a lightweight design of the streamlined deflector 2, and the lightweight material can be a lightweight metal alloy, such as a magnesium alloy, an aluminum alloy, or a carbon fiber composite material, or a polymer foam material; the streamlined deflector 2 can rotate freely relative to the round-bottom cylinder 1, such as Figure 3As shown, the streamlined guide plate 2 has a teardrop-shaped cross-section, and the streamlined guide plate 2 is composed of a part A 21 and a part B 22. Preferably, the part A 21 is a semi-cylinder coaxial with the round-bottom cylinder 1, and the part B 22 is a mirror-symmetrical arc plate, which intersects on the side away from the part A 21; after the part A 21 and the part B 22 are combined, a cavity 23 coaxial with the round-bottom cylinder 1 and having the same shape as that of the round-bottom cylinder 1 is formed inside, and the aperture of the cavity 23 is larger than the outer diameter of the round-bottom cylinder 1, and the round-bottom cylinder 1 is arranged to pass through the cavity 23.

[0035] Among them, the A part 21 and the B part 22 of the streamlined deflector 2 are detachably connected to facilitate the installation of the streamlined deflector and its application to the installed outdoor round-bottom cylinder. The detachable connection method can be a common detachable connection method such as a snap connection, a threaded connection, and a bolt locking. In this embodiment, the detachable connection method of the A part 21 and the B part 22 is a bolt locking structure 24, specifically: at least one group of mounting holes 241 are relatively opened on the A part 21 and the B part 22, and the mounting holes 241 are embedded with mounting bolts 242. The bolts 242 are locked and fastened to realize a pair of semi-streamlined deflectors 2- 1, of course, the position and number of the mounting holes 241 are adaptively designed to achieve a tight fit of the streamlined deflector 2; preferably, a cover 243 is provided at the opening of the mounting hole 241, and the cover 243 is flush with the outer surface of the streamlined deflector 2 after closing the mounting hole 241, that is, the cover 243 exposed on the outer surface has the same curvature as the outer surface of the streamlined deflector 2 at the location of the mounting hole 241, so as to reduce the additional wind resistance generated by the installation hole 241 and delay the rusting of the bolt 242, wherein, in order to facilitate removal or opening, the cover 243 can be designed as a push-type switch or an additional push-to-reset structure can be set in the mounting hole 241.

[0036] Furthermore, the cavity 23 through which the round bottom cylinder 1 passes is provided with a structure or component that is conducive to reducing the relative rotation friction between the two, such as lubricating oil, rolling bearings, etc. The structure adopted in this embodiment is: bearings 3 are provided at both ends of the cavity 23, and the bearings 3 connect the streamlined guide plate 2 and the round bottom cylinder 1 to reduce the friction when the two rotate relative to each other. The bearings 3 are split bearings for easy assembly, wherein the bearings 3 can be polymer bearings, and the polymer can be phenolic resin, nylon, polytetrafluoroethylene (PTFE) and other lightweight and wear-resistant materials, or graphite bearings with good self-lubricating effect and low friction coefficient can be selected to further achieve lightweighting of the device. It should be understood that in addition to the two ends of the cavity 23, the bearings 3 can also be arranged in the middle of the cavity 23.

[0037] Furthermore, the streamlined guide plate 2 is divided into several sections, so that the streamlined guide plate 2 is easy to process, transport and install, and is also more conducive to fitting the round-bottom cylinder 1, especially the truncated cone-shaped cylinder, and has a wider applicability. Several limiting structures are arranged at intervals on the round-bottom cylinder 1, and the streamlined guide plate 2 is arranged between two adjacent limiting structures, so that the adjacent streamlined guide plates 2 can rotate relatively independently and are not prone to mutual interference; the limiting structure can be a limiting block protruding from the round-bottom cylinder 1, and the protruding height of the limiting block is greater than the gap width between the outer diameter of the round-bottom cylinder 1 and the cavity 23. This limiting method is suitable for round-bottom cylinders that have not yet been installed; or as Figure 1 As shown, the limiting structure is a limiting ring 4 tightly fastened on the round-bottom cylinder 1, and the ring width of the limiting ring 4 is larger than the gap width between the outer diameter of the round-bottom cylinder 1 and the cavity 23. This limiting method is suitable for a wider range of usage scenarios. Preferably, the upper and lower bottom surfaces of the limiting ring 4 are provided with convex rings along the inner ring, and the convex rings are inserted into the cavity 23 or directly conflict with the streamlined guide plate 2.

[0038] In actual use, the wind resistance reducing device can be installed on any round-bottomed cylinder to realize the overall wind resistance resistance of the application device and correspondingly have the advantages of reducing the structural strength and material consumption of the application part, as shown in Example 2.

[0039] It should be understood that this embodiment is only a preferred solution of the present application, not the only solution, and this description is only for the sake of clarity. Those skilled in the art should consider the specification as a whole;

[0040] Embodiment 2

[0041] This embodiment provides an outdoor device, wherein a round-bottom cylinder of the outdoor device is provided with a wind resistance reducing device of the round-bottom cylinder as described in any one of the above-mentioned ones.

[0042] Preferably, the outdoor device is a wind turbine, and a round-bottomed cylindrical wind resistance reducing device as described in Example 1 is provided on the main pole of the wind turbine, wherein there are several wind resistance reducing devices, and the height of each wind resistance reducing device is set according to the main pole height, transportation cost, etc. The wind turbine using the wind resistance reducing device has the advantages of strong wind resistance resistance and low material consumption, relatively low main structure strength, reduced manufacturing and transportation costs, and reduced overall installation difficulty coefficient.

[0043] Preferably, the outdoor device is a cable-stayed bridge, and the steel cables and cylindrical columns of the cable-stayed bridge are provided with a wind resistance reducing device of a round-bottom cylinder as described in Example 1, so as to effectively reduce the air resistance on the steel cables, reduce the swing amplitude of the cables, improve the overall stability of the bridge body, and ultimately achieve a stronger wind resistance capability of the bridge body as a whole.

[0044] Preferably, the outdoor device is a high-altitude power generation device, which includes a mooring rope and an aircraft at the end thereof, and the mooring rope is provided with a wind resistance reduction device having a round bottom cylinder as described in the first embodiment, wherein the wind resistance reduction device is made of a lightweight material, and the height of the wind resistance reduction device is set to facilitate the storage and release of the mooring rope. The use of a mooring rope with a wind resistance reduction device can effectively reduce the air resistance of the mooring rope when it moves with the aircraft, thereby increasing the flight speed and altitude of the aircraft, reducing the energy consumption of the rope body, and even providing a larger layout space for other transmission lines.

[0045] It should be understood that the application products listed in this embodiment are not the only application scenarios of the wind resistance reduction device involved in this application. Any device involving a round-bottomed cylinder and having a need to resist wind resistance can be applied to the wind resistance reduction device.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A round-bottomed cylinder wind resistance reduction device, comprising a round-bottomed cylinder (1), characterized in that: The circular bottom cylinder (1) is provided with a streamlined guide plate (2) on its outer shell. The streamlined guide plate (2) can rotate freely relative to the circular bottom cylinder (1). The streamlined guide plate (2) has a teardrop-shaped cross section. The streamlined guide plate (2) is composed of a portion A (21) and a portion B (22). After the portion A (21) and the portion B (22) are combined, a cavity (23) coaxial with the circular bottom cylinder (1) and having the same shape as the cavity (23) is formed inside. The aperture of the cavity (23) is larger than the outer diameter of the circular bottom cylinder (1).

2. The wind resistance reducing device of a round-bottomed cylinder according to claim 1, characterized in that: Both ends of the cavity (23) are provided with bearing bushes (3), the bearing bushes (3) connect the streamlined guide plate (2) and the round-bottom cylinder (1), and the bearing bushes (3) are split bearing bushes.

3. The wind resistance reducing device of a round-bottomed cylinder according to claim 1, characterized in that: The A part (21) is a semi-cylinder coaxial with the circular bottom cylinder (1), and the B part (22) is a mirror-symmetrical arc-shaped plate, and the arc-shaped plates intersect at a side away from the A part.

4. The wind resistance reducing device of a round-bottomed cylinder according to claim 1, characterized in that: The A part (21) and the B part (22) are detachably connected, and the detachable connection is a bolt locking structure (24). At least one group of mounting holes (241) are relatively opened on the A part and the B part, and the mounting holes (241) are used to embed mounting bolts (242).

5. The wind resistance reducing device of a round-bottomed cylinder according to claim 4, characterized in that: A sealing cover (243) is provided at the opening of the mounting hole (241); after the sealing cover (243) seals the mounting hole (241), it is flush with the surface of the streamlined guide plate (2).

6. The wind resistance reducing device of a round-bottomed cylinder according to claim 1, characterized in that: The streamlined guide plate (2) is made of a lightweight material, which is a lightweight metal alloy, a carbon fiber composite material or a polymer foam material.

7. The wind resistance reducing device of a round-bottomed cylinder according to claim 1, characterized in that: The streamlined guide plate (2) is composed of a plurality of sections, a plurality of limiting structures are arranged at intervals on the round-bottom cylinder (1), and the streamlined guide plate (2) is arranged between two adjacent limiting structures.

8. The wind resistance reducing device of a round-bottomed cylinder according to claim 7, characterized in that: The limiting structure is a limiting block protruding from the round-bottomed cylinder (1), and the protruding height of the limiting block is greater than the gap width between the outer diameter of the round-bottomed cylinder (1) and the cavity (23).

9. The wind resistance reducing device of a round-bottomed cylinder according to claim 7, characterized in that: The limiting structure is a limiting ring (4) tightly fastened on the round-bottom cylinder (1), and the ring width of the limiting ring (4) is greater than the gap width between the outer diameter of the round-bottom cylinder (1) and the cavity (23).

10. An outdoor device, characterized in that: The round-bottomed cylinder of the outdoor device is provided with a round-bottomed cylinder wind resistance reducing device as described in any one of claims 1-9.

11. An outdoor device according to claim 10, characterized in that: The outdoor device is a wind generator, and the wind resistance reducing device is arranged on the main pole of the wind generator.

12. An outdoor device according to claim 10, characterized in that: The outdoor device is a cable-stayed bridge, and the wind resistance reducing device is arranged on the steel cables and cylindrical columns of the cable-stayed bridge.

13. An outdoor device according to claim 10, characterized in that: The outdoor device is a high-altitude power generation device, which includes a mooring rope and an aircraft arranged at the end thereof, and the wind resistance reducing device is arranged on the mooring rope.

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