Angle adjusting device for blades of wind driven generator

Abstract

The utility model belongs to the technical field of wind power generation auxiliary devices, and discloses an angle adjusting device for blades of a wind driven generator, which comprises a blade angle adjusting mechanism, the blade angle adjusting mechanism comprises a mounting column, the outer wall of the mounting column is rotatably connected with a connecting column through a sleeve I, and the outer wall of the connecting column is fixedly sleeved with a worm gear and meshed with a worm. One end of the worm is connected with the stepping motor, the outer wall of the connecting column is fixedly sleeved with a limiting ring block, the side face, away from the worm gear, of the limiting ring block is in lap joint with a limiting ring plate, the connecting column movably penetrates through the limiting ring plate to be fixedly connected with blades of the wind driven generator, and the limiting ring plate is fixedly connected to the mounting column through a fixing column; by arranging the worm gear and the worm, the angle of the paddle is convenient to adjust, meanwhile, the paddle is well limited, the deflection of the paddle is reduced, by arranging the sleeve I, the limiting ring block and the limiting ring plate, the paddle is convenient to limit, the angle of the paddle is convenient to stably adjust, and by arranging the ball, the friction force is convenient to reduce, and the energy consumption is convenient to reduce.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of angle adjusting devices of wind turbine blade, belong to wind power auxiliary device technical field. BACKGROUND

[0002] Wind energy is a kind of clean renewable energy, with huge application potential, and has developed rapidly in recent years. Propeller wind turbine is a commonly used device for converting wind energy into electrical energy. Its basic structure includes tower, blade, rotor, generator and control system. The blade of wind turbine is responsible for capturing wind energy and converting it into mechanical energy, playing a key role in the energy conversion process. Most existing blades have fixed wind-incident area, which is inconvenient to adjust. The blade with fixed wind-incident area cannot fully utilize wind energy at low wind speed, and may not adapt to high wind speed changes at high wind speed, resulting in reduced energy conversion efficiency.

[0003] In order to adapt the blade of wind turbine to current wind speed, the wind-incident angle of blade is generally adjusted by variable pitch mechanism to adapt to wind speed changes, so that wind energy can be more effectively converted into electrical energy. The variable pitch mechanism in the prior art can meet general use requirements. For example, CN 222363092U discloses a wind turbine variable pitch device, which includes a housing and a head. The head is fixedly connected to the housing. The housing has a support fixedly connected to the inner wall of the housing. The support has vertically spaced plates fixedly connected thereto. The vertically spaced plates have adjustment grooves formed therein. The support has a drive mechanism. The drive mechanism drives the lifting plate to move. The movement of the lifting plate drives the bending rod to move. The bending rod drives the connecting rod to move, thereby realizing variable pitch operation of the blade. However, it involves a linkage mechanism, forms multi-stage transmission, increases intermediate links in transmission, reduces transmission efficiency, increases useless work loss, and increases energy consumption of the variable pitch mechanism. Therefore, a wind turbine blade angle adjusting device with fewer transmission stages and high transmission efficiency is needed. SUMMARY

[0004] The utility model aims to provide a kind of angle adjusting devices of wind turbine blade.

[0005] In order to achieve the above object, the utility model discloses the following technical scheme: a kind of angle adjusting device of wind turbine blade, including the blade angle adjusting mechanism being connected with the paddle of wind power generation device, the blade angle adjusting mechanism includes mounting post, one end of the mounting post is rotatably connected with bearing seat, the bearing seat is fixedly installed in the cabin of wind turbine, sleeve I is fixedly connected on the outer wall of the one end of mounting post away from cabin, connecting post is rotatably connected in the sleeve I, the one end of the connecting post away from mounting post extends to the outside of sleeve I, and outer wall is fixedly sleeved with worm gear, the worm gear is meshed with worm on, one end of the worm is fixedly connected with the output shaft of step motor, the step motor is fixedly installed on the outer wall of mounting post by motor support, the outer wall of the one end of connecting post away from sleeve I is fixedly sleeved with limit ring block, the side of limit ring block away from worm gear is slidably overlapped with limit ring plate, the one end of connecting post away from sleeve I is movably penetrated limit ring plate and is fixedly connected with the paddle of wind turbine, the outside of limit ring plate is fixedly connected with fixed column, the one end of fixed column away from limit ring plate is fixedly connected on the outer wall of mounting post.

[0006] Preferably, the mounting post, connecting post are hollow structure, the number of sleeve I corresponds to the number of the paddle of wind turbine, the one end of the mounting post away from bearing seat is fixedly connected with fairing, the one end of the connecting post away from mounting post is rotatably penetrated fairing, and is fixedly connected with the paddle of wind turbine, the outer wall of the one end of mounting post close to bearing seat is rotatably connected with electric slip ring, the electric slip ring is electrically connected with single-chip microcomputer controller and step motor respectively.

[0007] Preferably, the inner wall of sleeve I, the outer wall of connecting post, the relative surface between limit ring block and limit ring plate, the inner wall of limit ring plate are smooth surface or lubricated surface.

[0008] Preferably, the inner wall of sleeve I, the inner wall of limit ring plate are rotatably embedded with ball I, the outer wall of connecting post is rotatably overlapped with ball I, the side of limit ring plate close to limit ring block is rotatably embedded with ball II, the side of limit ring block close to limit ring plate is rotatably overlapped with ball II.

[0009] Preferably, the side of worm gear away from sleeve I is slidably overlapped with limit ring plate.

[0010] Preferably, the outer wall of the one end of worm close to step motor is fixedly sleeved with worm stabilizing mechanism, the worm stabilizing mechanism includes limit round plate fixedly sleeved on the outer wall of worm, limit shell is rotatably sleeved on the outer wall of limit round plate, the worm is rotatably penetrated limit shell, the limit shell is fixedly connected on the outer wall of mounting post through fixed support, the outer wall of limit round plate, the inner wall of limit shell are smooth surface or lubricated surface.

[0011] Preferably, the inner wall of the limiting shell is embedded with rolling balls III, which rollingly engages with the outer wall of the limiting disc.

[0012] Preferably, the two ends of the limiting shell are fixedly connected with sleeves II, which are rotationally sleeved on the outer wall of the worm, and the inner wall of the sleeve II and the outer wall of the worm located in the sleeve II are smooth or lubricated surfaces.

[0013] Preferably, the inner wall of the sleeve II is embedded with rolling balls IV, which rollingly engages with the outer wall of the worm.

[0014] Preferably, the connecting column is rotationally connected to the outer wall of the mounting column through a rotary support.

[0015] Beneficial effects

[0016] 1. The angle adjusting device for the wind turbine blade has less transmission stages and high transmission efficiency, the worm gear and the worm are arranged, the angle of the paddle of the wind turbine is conveniently adjusted, the paddle of the wind turbine has a good limiting effect, the paddle deflection is reduced, the sleeve I, the limiting ring block and the limiting disc are arranged, the paddle is conveniently limited, the angle of the paddle is conveniently and stably adjusted, the rolling balls are arranged, the friction is conveniently reduced, and the energy consumption is conveniently reduced.

[0017] 2. The angle adjusting device for the wind turbine blade has the worm stabilizing mechanism, the worm is stably arranged in the axial and radial directions, the limiting effect of the worm gear and the worm on the paddle is improved, and the angle of the paddle is conveniently and stably adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a connection state schematic view of the blade angle adjusting mechanism and the paddle in the utility model;

[0019] Figure 2 It is a sectional structure schematic view of A in the utility model; Figure 1

[0020] Figure 3 It is a structure schematic view of the blade angle adjusting mechanism in the utility model;

[0021] Figure 4 It is a side sectional structure schematic view of the limiting disc in the utility model;

[0022] Figure 5 It is a structure schematic view of the second embodiment in the utility model;

[0023] Figure 6 It is a side sectional structure schematic view of the limiting disc in the second embodiment;

[0024] Figure 7 ​This is a side sectional view of the worm gear stabilizing mechanism in Embodiment 3 of this utility model.

[0025] In the diagram: 1. Mounting post; 2. Sleeve I; 3. Connecting post; 4. Worm gear; 5. Worm; 6. Stepper motor; 7. Limiting ring block; 8. Limiting ring plate; 9. Blade; 10. Fixing post; 11. Fairing; 12. Ball I; 13. Ball II; 14. Limiting circular plate; 15. Limiting shell; 16. Ball III; 17. Sleeve II; 18. Ball IV. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1:

[0028] like Figures 1-4 As shown, this embodiment provides a technical solution: a wind turbine blade angle adjustment device, including a blade angle adjustment mechanism connected to the blade 9 of the wind turbine. The blade angle adjustment mechanism includes a mounting column 1, one end of which is rotatably connected to a bearing seat (not shown in the figure). The end of the mounting column 1 connected to the bearing seat is cylindrical. The bearing seat is fixedly installed inside the nacelle of the wind turbine. The nacelle is installed on the top of the tower. The structure of the tower, nacelle, etc., in this embodiment, except for the blade angle adjustment mechanism, is the same as that of existing wind turbines, and will not be described in detail here. One end of the mounting column 1 located inside the nacelle is coaxially fixedly connected to a drive shaft, and is connected to the gearbox and generator inside the nacelle. A sleeve I2 is fixedly connected to the outer wall of the end of the mounting column 1 away from the nacelle. A connecting column 3 is rotatably connected inside the sleeve I2. The connecting column 3 is located away from the mounting column 1. The end extends to the outside of the sleeve I2, and a worm gear 4 is fixedly sleeved on the outer wall. A worm 5 is meshed on the worm gear 4. One end of the worm 5 is coaxially fixedly connected to the output shaft of the stepper motor 6. The stepper motor 6 is fixedly mounted on the outer wall of the mounting column 1 through a motor bracket. A limiting ring block 7 is fixedly sleeved on the outer wall of the end of the connecting column 3 away from the sleeve I2. A limiting ring plate 8 is slidably overlapped on the side of the limiting ring block 7 away from the worm gear 4. The end of the connecting column 3 away from the sleeve I2 moves through the limiting ring plate 8 and is fixedly connected to the blade 9 of the wind turbine through a flange or bolt. A fixing column 10 is fixedly connected to the outside of the limiting ring plate 8. The fixing column 10 is located outside the limiting ring plate 8 and the worm gear 4. The end of the fixing column 10 away from the limiting ring plate 8 is fixedly connected to the outer wall of the mounting column 1. In this embodiment, the two ends of the fixing column 10 are respectively threadedly fixedly connected to the limiting ring plate 8 and the outer wall of the mounting column 1.

[0029] Specifically, the mounting column 1 and the connecting column 3 are hollow structures, which are convenient for reducing weight, saving energy consumption, and improving power generation efficiency, the number of the sleeve I 2 corresponds to the number of the blades 9 of the wind driven generator, in the embodiment, the number of the sleeve I 2 is three, the rectifier cover 11 is fixedly connected to the end of the mounting column 1 away from the bearing seat, the rectifier cover 11 is rotatably connected with the cabin or is rotatably connected with the cabin through a rotary support, the connecting column 3 rotatably penetrates through the rectifier cover 11 at the end away from the mounting column 1 and is fixedly connected with the blades 9 of the wind driven generator, and the electric slip ring (not shown in the figure) is rotatably connected to the outer wall of the end of the mounting column 1 close to the bearing seat, and the electric slip ring is electrically connected with the single-chip microcomputer controller and the stepping motor 6 respectively.

[0030] Specifically, the inner wall of the sleeve I 2, the outer wall of the connecting column 3, the relative surfaces between the limiting ring block 7 and the limiting ring plate 8, and the inner wall of the ring hole of the limiting ring plate 8 are smooth or lubricated surfaces, the ball bearings I 12 are rotatably embedded on the inner wall of the sleeve I 2 and the inner wall of the ring hole of the limiting ring plate 8, the ball bearings I 12 are rotatably connected with the outer wall of the connecting column 3, and the ball bearings II 13 are rotatably embedded on the side of the limiting ring plate 8 close to the limiting ring block 7, and the ball bearings II 13 are rotatably connected with the side of the limiting ring block 7 close to the limiting ring plate 8.

[0031] The working process of the utility model is that the anemograph matched with the wind driven generator transmits the wind speed information to the single-chip microcomputer controller, the single-chip microcomputer controller controls the stepping motor 6 to work, then drives the worm wheel 4 to rotate through the worm 5, then drives the connecting column 3 to rotate, and then adjusts the wind-attacking angle of the blades 9 of the wind driven generator, the angle adjusting device of the wind driven generator blade of the utility model is convenient for adjusting the angle of the blades of the wind driven generator through the setting of the worm wheel and the worm, has good limiting effect on the blades of the wind driven generator, reduces the deflection of the blades, is convenient for limiting the blades through the setting of the sleeve I, the limiting ring block and the limiting ring plate, is convenient for stably adjusting the angle of the blades, is convenient for reducing the friction force and reducing the energy consumption.

[0032] Embodiment two:

[0033] As Figures 5-6As shown, this embodiment provides a technical solution: a wind turbine blade angle adjustment device, including a blade angle adjustment mechanism connected to the blade 9 of the wind turbine. The blade angle adjustment mechanism includes a mounting column 1, one end of which is rotatably connected to a bearing seat, which is fixedly installed inside the nacelle of the wind turbine. A sleeve I2 is fixedly connected to the outer wall of the end of the mounting column 1 away from the nacelle. A connecting column 3 is rotatably connected inside the sleeve I2. The end of the connecting column 3 away from the mounting column 1 extends to the outside of the sleeve I2, and a worm gear 4 is fixedly sleeved on its outer wall. A worm 5 is meshed on the worm gear 4. One end of the worm 5 is coaxially fixedly connected to the output shaft of a stepper motor 6. The stepper motor 6 is fixedly installed on the outer wall of the mounting column 1 through a motor bracket. A limiting ring plate 8 is slidably overlapped on the side of the worm gear 4 away from the sleeve I2. The ball II 13 on the limiting ring plate 8 rolls and overlaps with the side of the worm gear 4 away from the sleeve I2. Other structures are the same as in Embodiment 1.

[0034] Example 3:

[0035] like Figure 7 As shown, this embodiment provides a technical solution: a wind turbine blade angle adjustment device, including a blade angle adjustment mechanism connected to the blade 9 of the wind turbine. The blade angle adjustment mechanism includes a mounting column 1, one end of which is rotatably connected to a bearing seat, which is fixedly installed inside the nacelle of the wind turbine. A sleeve I2 is fixedly connected to the outer wall of the end of the mounting column 1 away from the nacelle. A connecting column 3 is rotatably connected inside the sleeve I2. The end of the connecting column 3 away from the mounting column 1 extends to the outside of the sleeve I2, and a worm gear 4 is fixedly sleeved on its outer wall. A worm 5 is meshed on the worm gear 4. One end of the worm 5 is coaxially fixedly connected to the output shaft of a stepper motor 6. The stepper motor 6 is fixedly installed on the outer wall of the mounting column 1 via a motor bracket. A worm stabilizing mechanism is fixedly sleeved on the outer wall of the end of the worm 5 near the stepper motor 6. The worm stabilizing mechanism includes a limiting circular plate 14 fixedly sleeved on the outer wall of the worm 5. A limiting shell 15 is rotatably sleeved on the outer wall of the 4th plate. The worm gear 5 rotates through the limiting shell 15 in the thickness direction. The limiting shell 15 is fixedly connected to the outer wall of the mounting column 1 by a fixed bracket. The outer wall of the limiting circular plate 14 and the inner wall of the limiting shell 15 are smooth or lubricated surfaces. A ball bearing Ⅲ16 is rolled and embedded on the inner wall of the limiting shell 15. The ball bearing Ⅲ16 rolls and overlaps with the outer wall of the limiting circular plate 14. Sleeves Ⅱ17 are fixedly connected to both ends of the limiting shell 15. The sleeves Ⅱ17 rotate and sleeve... The inner wall of the sleeve II 17 and the outer wall of the part of the worm 5 located inside the sleeve II 17 are smooth or lubricated surfaces. The inner wall of the sleeve II 17 is inlaid with rolling balls IV 18, which roll and overlap with the outer wall of the worm 5. By setting the worm stabilizing mechanism, the worm 5 can be stabilized axially and radially, which can improve the limiting effect of the worm 5 and worm wheel 4 on the blade 9 and facilitate the stable adjustment of the blade 9 angle. Other structures are the same as in Embodiment 1 or 2.

[0036] Embodiment four;

[0037] The embodiment provides a technical scheme: an angle adjusting device of a wind turbine blade, which comprises a blade angle adjusting mechanism connected with a paddle 9 of a wind power device, the blade angle adjusting mechanism comprises a mounting column 1, one end of the mounting column 1 is rotationally connected with a bearing seat, the bearing seat is fixedly installed in a cabin of the wind turbine, and the outer wall of the other end of the mounting column 1 away from the cabin is rotationally connected with a connecting column 3, the connecting column 3 is rotationally connected to the outer wall of the mounting column 1 through a rotary support, and the other structures are the same as those in embodiment one or two or three.

[0038] As an alternative, the ball bearings I 12, ball bearings II 13 can be replaced by rollers.

Claims

1. An angle adjustment device for a wind turbine blade, comprising a blade angle adjustment mechanism connected to a blade (9) of a wind turbine, characterized in that: The blade angle adjusting mechanism comprises a mounting column (1), one end of which is rotatably connected with a bearing seat, the bearing seat is fixedly installed in the cabin of the wind driven generator, the outer wall of the end of the mounting column (1) away from the cabin is fixedly connected with a sleeve I (2), the sleeve I (2) is rotatably connected with a connecting column (3), the end of the connecting column (3) away from the mounting column (1) extends to the outside of the sleeve I (2), and the outer wall is fixedly sleeved with a worm wheel (4), the worm wheel (4) is meshingly connected with a worm (5), one end of the worm (5) is fixedly connected with the output shaft of a stepping motor (6), the stepping motor (6) is fixedly installed on the outer wall of the mounting column (1) through a motor support, the outer wall of the end of the connecting column (3) away from the sleeve I (2) is fixedly sleeved with a limiting ring block (7), the side of the limiting ring block (7) away from the worm wheel (4) is slidably overlapped with a limiting ring plate (8), the end of the connecting column (3) away from the sleeve I (2) is movably penetrated through the limiting ring plate (8) and is fixedly connected with the blade (9) of the wind driven generator, the outer side of the limiting ring plate (8) is fixedly connected with a fixing column (10), and the end of the fixing column (10) away from the limiting ring plate (8) is fixedly connected on the outer wall of the mounting column (1).

2. An angle adjustment device for a wind turbine blade according to claim 1, characterised in that: The mounting column (1) and the connecting column (3) are hollow structures, the number of the sleeve I (2) corresponds to the number of the blade (9) of the wind driven generator, the end of the mounting column (1) away from the bearing seat is fixedly connected with a fairing (11), the end of the connecting column (3) away from the mounting column (1) is rotatably penetrated through the fairing (11) and is fixedly connected with the blade (9) of the wind driven generator, the outer wall of the end of the mounting column (1) close to the bearing seat is rotatably connected with an electric slip ring, and the electric slip ring is electrically connected with the single-chip microcomputer controller and the stepping motor (6) respectively.

3. An angle adjustment device for a wind turbine blade according to claim 1, characterized in that: The inner wall of the sleeve I (2), the outer wall of the connecting column (3), the opposite surfaces between the limiting ring block (7) and the limiting ring plate (8) and the inner wall of the limiting ring plate (8) are smooth or lubricated surfaces.

4. An angle adjustment device for a wind turbine blade according to claim 1, characterized in that: Ball bearings I (12) are rollingly embedded on the inner wall of the sleeve I (2) and the inner wall of the limiting ring plate (8), the ball bearings I (12) are rollingly overlapped with the outer wall of the connecting column (3), ball bearings II (13) are rollingly embedded on the side of the limiting ring plate (8) close to the limiting ring block (7), and the ball bearings II (13) are rollingly overlapped with the side of the limiting ring block (7) close to the limiting ring plate (8).

5. An angle adjustment device for a wind turbine blade according to claim 1, characterized in that: The side of the worm wheel (4) away from the sleeve I (2) is slidably overlapped with the limiting ring plate (8).

6. An angle adjustment device for a wind turbine blade according to claim 1, characterized in that: The outer wall of the end of the worm (5) close to the stepping motor (6) is fixedly sleeved with a worm stabilizing mechanism, the worm stabilizing mechanism comprises a limiting circular plate (14) fixedly sleeved on the outer wall of the worm (5), the outer wall of the limiting circular plate (14) is rotatably sleeved with a limiting shell (15), the worm (5) is rotatably penetrated through the limiting shell (15), and the limiting shell (15) is fixedly connected on the outer wall of the mounting column (1) through a fixing support, the outer wall of the limiting circular plate (14) and the inner wall of the limiting shell (15) are smooth or lubricated surfaces.

7. An angle adjustment device for a wind turbine blade according to claim 6, characterised in that: The inner wall of the limiting shell (15) is embedded with rolling balls III (16), which are in rolling engagement with the outer wall of the limiting round plate (14).

8. An angle adjustment device for a wind turbine blade according to claim 6, characterised in that: The two ends of the limiting shell (15) are fixedly connected with sleeves II (17), which are in rotating sleeve connection on the outer wall of the worm (5), and the inner wall of the sleeve II (17) and the outer wall of the worm (5) located in the inner part of the sleeve II (17) are smooth or lubricated surfaces.

9. An angle adjustment device for a wind turbine blade according to claim 8, characterised in that: The inner wall of the sleeve II (17) is embedded with rolling balls IV (18), which are in rolling engagement with the outer wall of the worm (5).

10. An angle adjustment device for a wind turbine blade according to claim 1, characterized in that: The connecting column (3) is in rotating connection on the outer wall of the mounting column (1) through the rotary support.

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