Power generation blade group with force unloading function

Abstract

The utility model belongs to the technical field of wind power generation, and discloses a power generation blade group with a force unloading function, which comprises a support frame, a central shaft is rotatably mounted at the center of the support frame, at least one blade combination is axially arranged on the central shaft, and the blade combination comprises a support rod and a first blade. A plurality of pairs of supporting rods are rotationally installed on the circumferential side of the center shaft, sleeves are fixedly installed on the sides, close to each other, of each pair of supporting rods, and a base is installed between each pair of sleeves through a reset assembly; a first blade is installed on the side wall of the base in an offset mode, a through groove is formed in the first blade, and a second blade is hinged to the interior of the through groove through a two-way torsion hinge. According to the utility model, through the arrangement of the reset assembly, the swing of the first blade is softer and the structure is more tough while the adaptive swing of the first blade and the limiting capability are ensured; and the second blade installed through the bidirectional torsion hinge can unload force when wind power is too large, and damage to parts caused by too large rotating speed is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of wind power generation, and specifically relates to a power generation blade assembly with a force unloading function. Background Art

[0002] Vertical axis wind turbines have the advantages of high wind energy utilization and low starting wind speed and have broad application prospects. However, since there is no restriction on the swing of the fan blades, the working surface cannot be maximized after the fan blades are blown by the wind, resulting in low rotation speed and low power generation efficiency.

[0003] In the prior art, for example, a vertical axis wind power generation device with a publication number of "CN218991779U" realizes swing limit by connecting limit ropes to the fan blades and the bracket. Although it can increase the effective action surface of the fan blades, increase the rotation speed and power generation efficiency, the limit ropes will be frequently straightened, which may easily lead to the separation and breakage of the two ends of the limit ropes, and generate a lot of noise during operation; in addition, when the wind force suddenly increases, the rotation speed will be greatly increased, which may easily lead to damage to the fan blades and other structures, which is not conducive to stable installation and operation.

[0004] Therefore, a power generation blade group with a force unloading function is proposed. Utility Model Content

[0005] The purpose of the utility model is to propose a power generation blade group with a force unloading function in order to improve the operation effect and operation safety in view of the above-mentioned existing problems.

[0006] A power generation blade group with a force unloading function comprises a support frame, a central axis is rotatably mounted at the center of the support frame, at least one blade combination is axially arranged on the central axis, the blade combination comprises a support rod and a first blade, a plurality of pairs of support rods are rotatably mounted on the circumferential side of the central axis, a sleeve is fixedly mounted on the side close to each other of each pair of the support rods, a base is mounted between each pair of the sleeves via a reset assembly; a first blade is offsetly mounted on the side wall of the base, a large-area first blade located on one side of the base forms a main action blade, and a small-area first blade located on the other side of the base forms a side effect blade, the first blade is provided with a through slot, a second blade is hinged in the through slot via a bidirectional torsion hinge.

[0007] Specifically, the supporting rods in each blade assembly are 2 to 6 pairs distributed in a circumference.

[0008] Specifically, the number of the through grooves is 1 to 3 and is opened on the first blade along the horizontal direction.

[0009] Furthermore, the bidirectional torsion hinges are all located on a side of the through slot close to the base.

[0010] Specifically, the reset assembly includes a guide rod and an externally threaded barrel, the sleeves are provided with plug-in grooves, each pair of plug-in grooves in the sleeves is plugged with the same guide rod, the guide rod is slidably mounted with an externally threaded barrel, the guide rod sleeve is provided with a spring, the two ends of the spring are respectively fixedly assembled with the sleeve and the externally threaded barrel, and the externally threaded barrel is threadedly assembled with the base.

[0011] Furthermore, the cross section of the guide rod is rectangular, and the external threaded barrel is axially provided with a guide hole matching the shape of the guide rod.

[0012] Specifically, the interior of the sleeve is clamped with a limiting ring, the spring is located in the limiting ring, and the inner diameter of the limiting ring is smaller than the outer diameter of the external threaded tube.

[0013] Specifically, when the first blade is not subjected to external force, the first blade is perpendicular to the support rod; when the first blade is subjected to force and swings to be parallel to the support rod, the external threaded tube abuts against the limit ring.

[0014] The utility model has the following advantages:

[0015] By setting up the reset component, while ensuring that the first blade can swing adaptively and has limiting ability, the swing of the first blade is made softer, the structure is more resilient and not easy to be damaged, and the internal setting is not in contact with the external environment, which can reduce noise during operation and increase service life.

[0016] In addition, the second blade installed through the two-way torsion hinge can unload the force when the wind is too strong, avoiding damage to components due to excessive rotation speed, stabilizing the rotation speed and improving operational safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic three-dimensional diagram of the structure of a blade assembly is provided for the utility model;

[0019] Figure 2 This is a schematic front view of the structure of the first blade of the utility model;

[0020] Figure 3 It is a schematic cross-sectional view of the structure inside the casing of the utility model;

[0021] Figure 4It is a schematic diagram of the posture of a first blade in the utility model being affected by wind and rotating one circle;

[0022] Figure 5 This is a front view schematically showing a structure in which a plurality of blade assemblies are arranged in the utility model.

[0023] In the figure: 1. first blade, 2. spring, 3. external threaded tube, 4. base, 5. guide rod, 6. sleeve, 7. central axis, 8. support frame, 9. support rod, 10. two-way torsion hinge, 11. second blade, 12. limit ring. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. However, the embodiments do not limit the protection scope of the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on the embodiments are all within the protection scope of the present invention.

[0025] The utility model discloses a power generation blade with a force unloading function. Figure 1-Figure 3 As shown, it includes a support frame 8, a central axis 7 is rotatably installed at the center of the support frame 8 through a bearing, and at least one blade combination is arranged on the central axis 7 along the axial direction; the blade combination includes a support rod 9 and a first blade 1, and a plurality of pairs of support rods 9 are rotatably installed on the circumferential side of the central axis 7, the support rods 9 are arranged horizontally, and a sleeve 6 is fixedly installed on the side of each pair of support rods 9 close to each other, the central axis 7 and the sleeve 6 are both arranged vertically, and a base 4 is installed between each pair of sleeves 6 through a reset component, and the reset component enables the base 4 to have a reset force.

[0026] A first blade 1 is offsetly installed on the side wall of the base 4. The large-area first blade 1 located on one side of the base 4 forms a main action blade, and the small-area first blade 1 located on the other side of the base 4 forms a side effect blade. The main action blade and the side effect blade with different areas will cause uneven force on both sides when there is wind, thereby swinging; the first blade 1 is provided with a through groove, and the second blade 11 is hinged in the through groove through a two-way torsion hinge 10. The two-way torsion hinge 10 is an existing component. When the first blade 1 is subjected to a large wind force, the second blade 11 will adaptively swing open with the two-way torsion hinge 10 as the center, so as to achieve the effect of unloading force and protecting the blade.

[0027] Specifically, the support rods 9 in each blade combination are 2 to 6 pairs distributed in a circle, and correspondingly, the reset assembly, the first blade 1 and other structures arranged thereon are also installed and arranged in a corresponding number, which can be increased or decreased according to actual needs.

[0028] Specifically, 1 to 3 through slots are opened on the first blade 1 along the horizontal direction, and correspondingly, the number of the second blade 11 and the two-way torsion hinge 10 are also matched and installed, and can be matched and designed according to the on-site wind volume to ensure the ability of unloading protection.

[0029] Furthermore, the bidirectional torsion hinges 10 are all located on the side of the through slot close to the base 4, so that the center of gravity of the first blade 1 is closer to the base 4, which is more conducive to the force swing of the first blade 1 without affecting the unloading function.

[0030] Specifically, the reset assembly includes a guide rod 5 and an externally threaded tube 3, and a plug-in groove is provided in the sleeve 6. The plug-in groove in each pair of sleeves 6 is plugged with the same guide rod 5, and the externally threaded tube 3 is slidably installed on the guide rod 5. The guide rod 5 is sleeved with a spring 2, and the two ends of the spring 2 are respectively fixedly assembled with the sleeve 6 and the externally threaded tube 3, and the externally threaded tube 3 is screwed and assembled with the base 4; when the first blade 1 is subjected to force and swings, the base 4 can be rotated, and the externally threaded tube 3 can be raised and lowered along the guide rod 5 through the screw connection, while the spring 2 on one side is stretched and the spring 2 on the other side is compressed. When the first blade 1 is not subjected to force, the spring 2 will gradually restore the externally threaded tube 3 to the center position.

[0031] Furthermore, the cross-section of the guide rod 5 is rectangular, and a guide hole matching the shape of the guide rod 5 is opened axially in the external threaded tube 3. Such a guide rod 5 and guide hole enable the external threaded tube 3 to only move up and down but not rotate circumferentially, thereby preventing the external threaded tube 3 from rotating with the rotating base 4.

[0032] Specifically, the interior of the sleeve 6 is clamped with a limit ring 12, the spring 2 is located in the limit ring 12, and the inner diameter of the limit ring 12 is smaller than the outer diameter of the external threaded tube 3; when the external threaded tube 3 is raised or lowered to the extreme position, it will resist the limit ring 12, thereby protecting the spring 2 and preventing the spring 2 from being over-compressed and reducing its elastic performance.

[0033] When the first blade 1 is not subjected to external force, the first blade 1 and the support rod 9 are perpendicular to each other to ensure that the force can be promptly applied when there is wind; when the first blade 1 is swung by force to be parallel to the support rod 9, the external threaded tube 3 and the limit ring 12 are offset to ensure that the force-bearing surface is maximized and the wind energy is maximized.

[0034] The working principle of this embodiment:

[0035] like Figure 5 As shown, a mode with multiple blade combinations can be used according to the setting requirements, and the central shaft 7 is connected to the generator input shaft.

[0036] like Figure 4As shown, for example, when wind comes from the front, the first blade 1 that is subjected to uneven force will swing adaptively through the reset assembly. The first blade 1 on the right side will swing to a position parallel to the support rod 9 after being limited by the reset assembly to obtain the maximum wind energy, thereby applying a counterclockwise torque on the central axis 7; while the first blade 1 on the left side does not reach the limited position of the reset assembly, and will only tend to swing to a position parallel to the wind direction to reduce wind resistance and ensure rotation efficiency.

[0037] When the wind force is too strong, the second blade 11 on the two-way torsion hinge 10 will be blown away to relieve the force, thereby preventing the blade assembly from rotating too fast and playing a safety protection role.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0039] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A power generation blade assembly with a force unloading function, comprising a support frame (8), wherein a central shaft (7) is rotatably mounted at the center of the support frame (8), characterized in that: At least one blade assembly is arranged along the axial direction on the central shaft (7), the blade assembly comprising a support rod (9) and a first blade (1), a plurality of pairs of support rods (9) are rotatably mounted on the circumferential side of the central shaft (7), a sleeve (6) is fixedly mounted on a side of each pair of the support rods (9) close to each other, and a base (4) is mounted between each pair of the sleeves (6) via a reset assembly; A first blade (1) is offsetly mounted on the side wall of the base (4); the large-area first blade (1) located on one side of the base (4) forms a main action blade, and the small-area first blade (1) located on the other side of the base (4) forms a side effect blade; the first blade (1) is provided with a through slot, and a second blade (11) is hingedly connected to the through slot via a bidirectional torsion hinge (10).

2. The power generation blade assembly with force unloading function according to claim 1, characterized in that: The number of support rods (9) in each blade assembly is 2 to 6 pairs distributed in a circumference.

3. The power generation blade assembly with force unloading function according to claim 1, characterized in that: The number of the through grooves is 1 to 3 and is opened on the first blade (1) along the horizontal direction.

4. The power generation blade assembly with force unloading function according to claim 1, characterized in that: The bidirectional torsion hinges (10) are all located on a side of the through slot close to the base (4).

5. The power generation blade assembly with force unloading function according to claim 1, characterized in that: The reset assembly comprises a guide rod (5) and an externally threaded barrel (3), the sleeves (6) are provided with plug-in grooves, and the same guide rod (5) is plugged into the plug-in grooves in each pair of the sleeves (6). The guide rod (5) is slidably mounted with an externally threaded barrel (3), and the guide rod (5) is sleeved with a spring (2), and the two ends of the spring (2) are respectively fixedly assembled with the sleeve (6) and the externally threaded barrel (3), and the externally threaded barrel (3) is screwed and assembled with the base (4).

6. The power generation blade assembly with force unloading function according to claim 5, characterized in that: The cross section of the guide rod (5) is rectangular, and the external threaded barrel (3) is provided with a guide hole in an axial direction that matches the shape of the guide rod (5).

7. The power generation blade assembly with force unloading function according to claim 5, characterized in that: The interior of the sleeve (6) is clamped with a limiting ring (12), the spring (2) is located inside the limiting ring (12), and the inner diameter of the limiting ring (12) is smaller than the outer diameter of the external threaded cylinder (3).

8. The power generation blade assembly with force unloading function according to claim 7, characterized in that: When the first blade (1) is not subjected to external force, the first blade (1) and the support rod (9) are perpendicular to each other; when the first blade (1) is subjected to force and swings to be parallel to the support rod (9), the external threaded cylinder (3) and the limiting ring (12) abut against each other.

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