Fan blade for wind turbine generator

Abstract

The utility model relates to the field of wind turbine generator blades, and provides a fan blade for a wind turbine generator, which is characterized in that a rotating hub is mounted on a case, the case is mounted on a vertical tower, a base is arranged at the bottom of the vertical tower, and the base is mounted on the ground; the fan blades comprise the first fan blade, the second fan blade and the third fan blade, and the first fan blade, the second fan blade and the third fan blade are installed on the rotating hub in a central symmetry mode. Two of the fan blades are improved, so that the fan blades are stored, and meanwhile, the first rotating mechanism and the second rotating mechanism are used for achieving rotating storage of the first fan blade and the second fan blade; the first fan blade and the second fan blade can be parallel to the third fan blade after being stored and are both vertically downward, and the typhoon resisting capacity of the fan blades is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of wind turbine blades, in particular to a fan blade for a wind turbine. Background Art

[0002] Wind power generation has become an important energy structure in my country. With the rapid update of wind power generation technology, the diameter of wind rotors has increased rapidly. Wind turbine generator sets include wind rotors and generators. The wind rotors are composed of blades, hubs, reinforcements, etc. The blades rotate to generate electricity under wind force, and the generator head rotates.

[0003] In extremely severe weather such as typhoons, wind turbines need to be shut down to prevent blade damage, but wind turbine blades still face a high risk of damage. Under the action of strong winds, they may break, and in severe cases, they may collapse, causing huge economic losses. Utility Model Content

[0004] The utility model proposes a fan blade for a wind turbine generator set. By improving two of the fan blades, the fan blades can be stored. At the same time, a first rotating mechanism and a second rotating mechanism are used to realize the rotational storage of the first fan blade and the second fan blade. After storage, the first fan blade and the second fan blade can be parallel to the third fan blade and face vertically downward, thereby effectively improving the ability of the fan blade to resist typhoons.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A fan blade for a wind turbine, wherein the fan blade is mounted on a rotating hub, the rotating hub is mounted on a chassis, the chassis is mounted on a tower, a base is provided at the bottom of the tower, and the base is mounted on the ground;

[0007] The fan blades include a first fan blade, a second fan blade, and a third fan blade, and the first fan blade, the second fan blade, and the third fan blade are mounted on the rotating hub in a centrosymmetrical manner;

[0008] The first fan blade and the second fan blade are both retractable blades, and the third fan blade is a fixed blade;

[0009] After being stored, the first fan blade and the second fan blade are both parallel to the third fan blade.

[0010] Furthermore, the first fan blade includes a first base and a first extension portion, the first base is mounted on the rotating hub, and the first extension portion is rotatably mounted on the first base via a first rotating mechanism;

[0011] The second fan blade includes a second base and a second extension portion. The second base is mounted on the rotating hub. The second extension portion is rotatably mounted on the second base via a second rotating mechanism.

[0012] Furthermore, the first rotating mechanism includes a first hemispherical seat, a first rotating motor, a first output shaft and a second hemispherical seat;

[0013] The first hemispherical seat is rotatably connected to the second hemispherical seat;

[0014] The first hemispherical seat is arranged at the connection end of the first base;

[0015] The second hemispherical seat is provided at the connecting end of the first extension portion;

[0016] A first stepped mounting hole is provided in the first hemispherical seat, a first connecting flange is installed on the first rotating motor, and the first connecting flange is installed in the first stepped mounting hole by bolts;

[0017] The first output shaft is connected to the first rotating motor;

[0018] A first through hole is provided in the second hemispherical seat, and the first output shaft is sleeved in the first through hole;

[0019] The first output shaft is mounted in the second hemispherical seat by means of bolts;

[0020] The second rotating mechanism has the same structure as the first rotating mechanism.

[0021] Furthermore, a first limiting flange is installed at the outer end of the first stepped mounting hole, and the first limiting flange is installed on the connecting end of the first hemispherical seat through bolts.

[0022] Furthermore, the end of the first through hole is connected with a plug through a thread.

[0023] Furthermore, the end portion of the first output shaft is cylindrical.

[0024] Furthermore, the angle between the docking surface of the first hemispherical seat and the second hemispherical seat and the axis of the first extension portion is 30°.

[0025] Furthermore, the ends of the third fan blades face vertically downward when the rotating hub stops urgently.

[0026] The utility model realizes the storage of the fan blades by improving two of the fan blades, and uses the first rotating mechanism and the second rotating mechanism to realize the rotational storage of the first fan blade and the second fan blade, so that the first fan blade and the second fan blade can be parallel to the third fan blade and face vertically downward after being stored, thereby effectively improving the ability of the fan blades to resist typhoons. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 This is a schematic diagram of the overall structure of a wind turbine blade for a wind turbine generator set in a specific embodiment of the present utility model;

[0029] Figure 2 for Figure 1 An enlarged structural diagram of position A of a wind turbine blade for a wind turbine generator system is shown;

[0030] Figure 3 For the picture Figure 2 Exploded view of the structure shown;

[0031] Figure 4 for Figure 1 A structural schematic diagram of a wind turbine blade for a wind turbine generator set in a stowed state is shown;

[0032] Explanation of the accompanying drawings: first fan blade 1; second fan blade 2; third fan blade 3; rotating hub 4; first rotating mechanism 5; first hemispherical seat 51; first stepped mounting hole 511; second hemispherical seat 52; first through hole 521; first rotating motor 53; first output shaft 54; first limiting flange 55; plug 56. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In the specific embodiment of the present invention, see Figure 1-Figure 4, a wind turbine blade for a wind turbine, the wind turbine blade is mounted on a rotating hub 4, the rotating hub is mounted on a chassis, the chassis is mounted on a tower, a base is provided at the bottom of the tower, and the base is mounted on the ground;

[0035] The fan blades include a first fan blade 1, a second fan blade 2 and a third fan blade 3, and the first fan blade 1, the second fan blade 2 and the third fan blade 3 are mounted on the rotating hub 4 in a centrosymmetrical manner;

[0036] In order to improve the ability of the fan blades to resist typhoons, the first fan blade 1, the second fan blade 2 and the third fan blade 3 are improved. Therefore, the first fan blade 1 and the second fan blade 2 are both set as storage blades, and the third fan blade 3 is a fixed blade;

[0037] Since the resistance is strongest when the fan blades are arranged downward and the three fan blades are arranged in the same direction, the first fan blade 1 and the second fan blade 2 are arranged to be parallel to the third fan blade 3 after being stored.

[0038] In the specific embodiment of the present invention, see Figure 1-Figure 4 The first fan blade 1 includes a first base 11 and a first extension 12, the first base 11 is mounted on the rotating hub 4, and the first extension 12 is rotatably mounted on the first base 11 through a first rotating mechanism 5;

[0039] The second fan blade 2 includes a second base 21 and a second extension portion 22 . The second base 21 is mounted on the rotating hub 4 . The second extension portion 22 is rotatably mounted on the second base 21 via a second rotating mechanism.

[0040] In the specific embodiment of the present invention, see Figure 1-Figure 4 , the first rotating mechanism 5 includes a first hemispherical seat 51, a first rotating motor 53, a first output shaft 54 ​​and a second hemispherical seat 52;

[0041] The first hemispherical seat 51 and the second hemispherical seat 52 are rotatably connected to realize the direction change of the first extension portion 12, thereby realizing the folding of the first fan blade 1;

[0042] The first hemispherical seat 51 is provided at the connection end of the first base 11;

[0043] The second hemispherical seat 52 is provided at the connection end of the first extension portion 12;

[0044] A first stepped mounting hole 511 is provided in the first hemispherical seat 51. The first stepped mounting hole 511 provides a mounting space for the first rotary motor 53. A first connecting flange 531 is mounted on the first rotary motor 53. The first connecting flange 531 is mounted in the first stepped mounting hole 511 by bolts.

[0045] The first output shaft 54 ​​is connected to the first rotating motor 53;

[0046] A first through hole 521 is provided in the second hemispherical seat 52 , and the first output shaft 54 ​​is sleeved in the first through hole 521 ;

[0047] The first output shaft 54 ​​is mounted in the second hemispherical seat by means of bolts;

[0048] The second rotating mechanism has the same structure as the first rotating mechanism 5 .

[0049] In the specific embodiment of the present invention, see Figure 1-Figure 4 , a first limiting flange 55 is installed at the outer end of the first stepped mounting hole 511, and the first limiting flange 55 is mounted on the connecting end of the first hemispherical seat 51 by bolts;

[0050] The first limiting flange 55 limits the first rotating motor 53 to improve the stability of the first rotating motor 53 during operation.

[0051] In the specific embodiment of the present invention, see Figure 1-Figure 4 The end of the first through hole 521 is connected to a plug 56 through a thread, and a sealing structure needs to be provided at the end of the plug 56.

[0052] In the specific embodiment of the present invention, see Figure 1-Figure 4 In order to realize the connection between the first output shaft 53 and the second hemispherical seat 52 , the end of the first output shaft 53 is set to be cylindrical to provide space for the connection between the first output shaft 53 and the second hemispherical seat 52 .

[0053] In the specific embodiment of the present invention, see Figure 1-Figure 4 , as viewed from the main view direction, specifically see 1 and 2, the angle between the docking surface of the first hemispherical seat 51 and the second hemispherical seat 52 and the axis of the first extension portion 12 is 30°. At this time, when the second hemispherical seat rotates 180°, the first extension portion moves 120° in the main view, that is, the first extension portion is vertically downward.

[0054] In the specific embodiment of the present invention, see Figure 1-Figure 4 , the end of the third fan blade is vertically downward when the rotating hub stops urgently.

[0055] In the specific embodiment of the present invention, see Figure 1-Figure 4 When an emergency stop occurs due to typhoon or other weather conditions, the first rotating motor 53 of the first rotating mechanism 5 starts working, and the first output shaft 54 ​​of the first rotating motor 53 drives the second hemispherical seat 52 to rotate 180 degrees. The first extension portion is equivalent to rotating 120 degrees in the vertical plane. At this time, the first extension portion 12 is just vertically downward, so that the first extension portion 12 is arranged parallel to the third fan blade 3;

[0056] Similarly, the second rotating mechanism drives the second extension portion 22 vertically downward;

[0057] The first extension portion 12, the second extension portion 22, and the third fan blade 3 are all vertically downward, which effectively improves the ability to resist external forces, improves the ability of the fan blade to resist adverse weather, and effectively extends its service life;

[0058] Since the first fan blade 1 and the second fan blade 2 are both provided with a first rotating mechanism 5 and a second rotating mechanism that can be accommodated, it is necessary to provide a counterweight structure 31 on the third fan blade 3. At the same time, for the sake of aesthetics, the counterweight structure is set to a spherical shape, which is the same as the appearance of the first fan blade 1 and the second fan blade 2.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fan blade for a wind turbine, the fan blade being mounted on a rotating hub, the rotating hub being mounted on a chassis, the chassis being mounted on a tower, a base being provided at the bottom of the tower, and the base being mounted on the ground; Its characteristics are: The fan blades include a first fan blade, a second fan blade, and a third fan blade, and the first fan blade, the second fan blade, and the third fan blade are mounted on the rotating hub in a centrosymmetrical manner; The first fan blade and the second fan blade are both retractable blades, and the third fan blade is a fixed blade; After being stored, the first fan blade and the second fan blade are both parallel to the third fan blade.

2. A wind turbine blade for a wind turbine according to claim 1, characterized in that: The first fan blade includes a first base and a first extension portion, the first base is mounted on the rotating hub, and the first extension portion is rotatably mounted on the first base via a first rotating mechanism; The second fan blade includes a second base and a second extension portion. The second base is mounted on the rotating hub. The second extension portion is rotatably mounted on the second base via a second rotating mechanism.

3. A wind turbine blade for a wind turbine according to claim 2, characterized in that: The first rotating mechanism includes a first hemispherical seat, a first rotating motor, a first output shaft and a second hemispherical seat; The first hemispherical seat is rotatably connected to the second hemispherical seat; The first hemispherical seat is arranged at the connection end of the first base; The second hemispherical seat is provided at the connecting end of the first extension portion; A first stepped mounting hole is provided in the first hemispherical seat, a first connecting flange is installed on the first rotating motor, and the first connecting flange is installed in the first stepped mounting hole by bolts; The first output shaft is connected to the first rotating motor; A first through hole is provided in the second hemispherical seat, and the first output shaft is sleeved in the first through hole; The first output shaft is mounted in the second hemispherical seat by means of bolts; The second rotating mechanism has the same structure as the first rotating mechanism.

4. A wind turbine blade for a wind turbine according to claim 3, characterized in that: A first limiting flange is installed at the outer end of the first stepped mounting hole, and the first limiting flange is installed on the connecting end of the first hemispherical seat through bolts.

5. The wind turbine blade for a wind turbine according to claim 3, characterized in that: The end of the first through hole is connected with a plug through a thread.

6. A wind turbine blade for a wind turbine according to claim 3, characterized in that: The end portion of the first output shaft is cylindrical.

7. The wind turbine blade for a wind turbine according to claim 3, characterized in that: An included angle between the mating surfaces of the first hemispherical seat and the second hemispherical seat and the axis of the first extending portion is 30°.

8. The wind turbine blade for a wind turbine according to claim 1, characterized in that: The ends of the third fan blades face vertically downward when the rotating hub stops in an emergency.

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