An adjustable blade structure for a wind turbine

Abstract

The utility model discloses an adjustable fan blade structure of wind turbine unit, including the blade main part and blade root of integral structure of connection, still include the locking assembly for the blade root and wind turbine wheel hub fixed, including wheel hub mounting seat, split type connection's locking assembly and outer flange plate, this locking assembly includes the flange block and apron of welded connection, the bolt post of vertical apron, this includes the fixed steel seat of installation in the blade root inside, and the surface of this fixed steel seat is vertical and has the limited stake column of circumferential distribution, still include the adjustable angle of adjustable connection assembly, including the guide ring and the limited rotary ring of rotation connection, through the installation flange plate and the limited rotary ring and the pre -buried bolt sleeve of collaborative effect of design, manually regulated the angle position of limited rotary ring to change the position of pre -buried bolt sleeve, reach the purpose of auxiliary installation fixed, the blade root of the fan blade of this application has the design of installation limit and flange adjustment.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine technology, specifically relating to an adjustable fan blade structure for a wind turbine. Background Technology

[0002] Wind turbines are devices that convert the kinetic energy of wind into electrical energy. The blades of a wind turbine are fixed to the hub with flanges and bolts. During installation, lifting equipment lifts the blades, and with manual assistance, the root of the blade is aligned with the hub and finally fixed with flanges and bolts. During the installation of the blades, the blades need to be hoisted, which requires frequent manual changes to the blade angle and position. The blades need to be adjusted frequently to ensure that the blades and hub are aligned. The blade installation process is quite complicated. The blade installation does not have an auxiliary limiting function, so it cannot limit the position of the blades and achieve alignment by adjusting the flange angle. Improvements are needed. When the blade root is installed on the hub, the existing design lacks installation limitations and flange adjustment for the blade root position. To address this, this application proposes an adjustable blade structure for wind turbine units. Utility Model Content

[0003] The purpose of this invention is to provide an adjustable blade structure for wind turbine units, in order to solve the problem mentioned in the background art that the wind turbine blades do not have installation limitations and flange adjustment at the root.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an adjustable blade structure for a wind turbine, comprising a blade body and a blade root connected as an integral structure; further comprising a locking assembly for fixing the blade root and the wind turbine hub, including a hub mounting seat, a separately connected locking assembly and an outer flange, the locking assembly including a welded flange block and a cover plate, and a pin for the vertical cover plate; a fixed steel seat installed inside the blade root, the surface of which has circumferentially distributed limiting posts; and an adjustable connection assembly with adjustable angle, including a rotatably connected guide ring and a limiting rotation ring, a mounting flange for the vertically limiting rotation ring, and a pre-embedded bolt sleeve fitted on the outside of the mounting flange.

[0005] Preferably, both the flange block and the cover plate are arc-shaped fan-shaped.

[0006] Preferably, a limiting insertion hole is formed on the surface of the limiting pile, and the pin and the limiting insertion hole cooperate with each other.

[0007] Preferably, the limiting post is tangent to the outer surface of the hub mounting seat, and there are several limiting posts on the fixed steel seat.

[0008] Preferably, the blade root, flange block, and outer flange have the same outer diameter, and the blade root, flange block, and outer flange are fixed together by bolts.

[0009] Preferably, the guide ring has an inverted "T" shaped cross-section, and the limiting rotating ring has a sliding ring cavity that cooperates with the guide ring. The circular limiting rotating ring is rotatably sleeved on the outside of the guide ring, and the limiting rotating ring matches the surface opposite to the fixed steel seat.

[0010] Preferably, the mounting flange has a insertion hole that mates with the pre-embedded bolt sleeve, and the inner and outer diameters of the mounting flange are the same as the inner and outer diameters of the limiting rotating ring, respectively.

[0011] Compared with the prior art, the beneficial effects of this utility model are: By designing a limiting pile and hub mounting seat, the blade position is prevented from deviating under the synergistic effect of the limiting pile and hub mounting seat; by designing a synergistic mounting flange, limiting rotating ring and pre-embedded bolt sleeve, the angle position of the limiting rotating ring can be manually adjusted, thereby changing the position of the pre-embedded bolt sleeve, to achieve the purpose of assisting installation and fixing. The blade root of the fan blade in this application has a design for installation limitation and flange adjustment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 For the present utility model Figure 1 Enlarged structural diagram of section A in the middle; Figure 3 For the present utility model Figure 2 Main view structural schematic diagram of the middle flange block; Figure 4 This is a schematic diagram of the main structure of the fixed steel base of this utility model; Figure 5 This is a cross-sectional view of the limiting rotating ring of this utility model.

[0013] In the figure: 1. Blade body; 2. Blade root; 3. Hub mounting seat; 4. Locking assembly; 5. Outer flange; 6. Limiting post; 7. Fixed steel seat; 8. Mounting flange; 9. Embedded bolt sleeve; 10. Guide ring; 11. Limiting rotation ring; 41. Flange block; 42. Cover plate; 43. Pin post. Detailed Implementation

[0014] 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.

[0015] Please see Figures 1 to 5 This utility model provides a technical solution: an adjustable blade structure for a wind turbine, including a blade body 1 and a blade root 2 connected as an integral structure. The structure and operating principle of the blade are known technologies and will not be described in detail in this application. It also includes a locking assembly for fixing the blade root 2 to the wind turbine hub, including a hub mounting seat 3, a separately connected locking assembly 4, and an outer flange 5. The hub mounting seat 3 is fixed to the wind turbine hub with bolts. The hub mounting seat 3 serves to limit the limiting post 6, preventing the limiting post 6 from tilting, thereby ensuring that the blade position during hoisting is aligned with the hub, facilitating blade installation. When the limiting post 6 is located outside the hub mounting seat 3, the locking assembly 4 is installed outside the hub mounting seat 3. Through the locking assembly 4, the outer flange 5, and the bolts, the blade root 2 is manually fixed. The locking assembly 4 includes a welded flange block 41 and a cover plate 42, and a pin 43 perpendicular to the cover plate 42. The pin 43 is inserted into the limiting post 6 to achieve locking. The fastening assembly 4 is fixed by four adjacent locking assemblies forming a complete flange to prevent them from scattering. It includes a fixed steel seat 7 installed inside the blade root 2, with circumferentially distributed limiting posts 6 perpendicularly distributed on its surface. The fixed steel seat 7 serves to fix and support the limiting posts 6 and the guide ring 10. It also includes an adjustable connecting assembly, comprising a rotatably connected guide ring 10 and limiting rotating ring 11, a mounting flange 8 perpendicular to the limiting rotating ring 11, and a pre-embedded bolt sleeve 9 fitted onto the outside of the mounting flange 8. During installation at the blade root 2, the mounting flange 8 is pre-installed on the hub. When the blade root 2 is opposite the hub, the installer can manually adjust the angle of the limiting rotating ring 11, thereby changing the position of the pre-embedded bolt sleeve 9 to align it with the mounting flange 8, facilitating accurate passage of the pre-embedded bolt sleeve 9 through the mounting flange 8. Finally, bolts are used to fix the fitted mounting flange 8 and the limiting rotating ring 11.

[0016] In this embodiment, both the flange block 41 and the cover plate 42 are fan-shaped arcs, which facilitates fitting the flange block 41 and the cover plate 42 onto the outside of the hub mounting seat 3.

[0017] In this embodiment, a limiting insertion hole is provided on the surface of the limiting pile 6, and the pin 43 cooperates with the limiting insertion hole. Through the limiting effect of the pin 43, the cover plate 42 and the limiting pile 6 can be kept stable.

[0018] In this embodiment, the limiting post 6 is tangent to the outer surface of the hub mounting seat 3. There are 4 limiting posts 6 on the fixed steel seat 7. The circumferentially distributed limiting posts 6 can limit the position of the fixed steel seat 7, so that the fixed steel seat 7 and the hub mounting seat 3 are aligned and the fixed steel seat 7 is not misaligned.

[0019] In this embodiment, the blade root 2, flange block 41, and outer flange 5 have the same outer diameter. The blade root 2, flange block 41, and outer flange 5 are fixed together by bolts. The overall stability of the blade root 2, flange block 41, and outer flange 5 is ensured by manual installation assistance.

[0020] In this embodiment, the cross-section of the guide ring 10 is an inverted "T" shape. The limiting rotating ring 11 has a sliding ring cavity that cooperates with the guide ring 10. The circular limiting rotating ring 11 is rotatably sleeved on the outside of the guide ring 10. Under manual adjustment, the angle of the limiting rotating ring 11 can be changed, so that the pre-embedded bolt sleeve 9 on the limiting rotating ring 11 can pass through the mounting flange 8. The limiting rotating ring 11 matches the surface opposite to the fixed steel seat 7.

[0021] In this embodiment, the mounting flange 8 is provided with a plug hole that mates with the pre-embedded bolt sleeve 9. The inner diameter and outer diameter of the mounting flange 8 are the same as the inner diameter and outer diameter of the limiting rotating ring 11, respectively. The mounting flange 8 and the limiting rotating ring 11 are fixed by bolts, and finally the fixing steel seat 7 is fixed, thereby fixing the blade root 2.

[0022] Working principle and usage process of this utility model: The hub mounting seat 3 is fixed to the wind turbine hub with bolts. The hub mounting seat 3 serves to limit the limiting pile 6 and prevent the limiting pile 6 from tilting, thereby ensuring that the blade is aligned with the hub and facilitating the installation of the blade. Mounting flange 8 is pre-installed on the wheel hub; When the blade is hoisted and installed, and the blade root 2 is installed opposite the hub, the installer can manually adjust the angle position of the limiting rotating ring 11 to change the position of the pre-embedded bolt sleeve 9. Align the pre-embedded bolt sleeve 9 with the mounting flange 8 to facilitate the accurate passage of the pre-embedded bolt sleeve 9 through the mounting flange 8; The mounting flange 8 and the limiting rotating ring 11 are fixed with bolts, and finally the fixing steel seat 7 is fixed, thereby fixing the blade root 2. Finally, the pin 43 is inserted into the limiting post 6 to fix the locking component 4. The four adjacent locking components 4 form a complete flange to prevent the locking components 4 from being scattered. With the locking components 4, the outer flange 5 and the bolts fixed, the blade root 2 can be manually fixed. In summary, the blade root 2 of the fan blade in this application has an installation limitation and flange adjustment design. Under the synergistic action of the limiting post 6 and the hub mounting seat 3, the blade position is limited to prevent deviation. Under the synergistic action of the mounting flange 8, the limiting rotating ring 11 and the pre-embedded bolt sleeve 9, the angle position of the limiting rotating ring 11 can be manually adjusted, thereby changing the position of the pre-embedded bolt sleeve 9 to achieve the purpose of assisting in installation and fixing.

[0023] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable fan blade structure for a wind turbine generator, characterized in that: The system includes a blade body (1) and a blade root (2) connected as an integral structure; it also includes a locking assembly for fixing the blade root (2) and the wind turbine hub, including a hub mounting seat (3), a split-connection locking assembly (4) and an outer flange (5), the locking assembly (4) including a welded flange block (41) and a cover plate (42), and a pin (43) for the vertical cover plate (42); it also includes a fixed steel seat (7) installed inside the blade root (2), the fixed steel seat (7) having circumferentially distributed limiting columns (6) on its surface; and an adjustable connection assembly with adjustable angle, including a rotatably connected guide ring (10) and a limiting rotatable ring (11), a mounting flange (8) for the vertically limiting rotatable ring (11), and a pre-embedded bolt sleeve (9) fitted on the outside of the mounting flange (8).

2. The adjustable fan blade structure of a wind turbine according to claim 1, characterized in that: Both the flange block (41) and the cover plate (42) are arc-shaped fan-shaped.

3. The adjustable fan blade structure of a wind turbine generator according to claim 1, characterized in that: The surface of the limiting pile (6) is provided with a limiting insertion hole, and the pin (43) cooperates with the limiting insertion hole.

4. The adjustable fan blade structure of a wind turbine generator according to claim 1, characterized in that: The limiting post (6) is tangent to the outer surface of the hub mounting seat (3), and there are 4 limiting posts (6) on the fixed steel seat (7).

5. The adjustable fan blade structure of a wind turbine generator according to claim 1, characterized in that: The blade root (2), flange block (41), and outer flange (5) have the same outer diameter, and the blade root (2), flange block (41), and outer flange (5) are fixed together by bolts.

6. The adjustable fan blade structure of a wind turbine generator according to claim 1, characterized in that: The cross section of the guide ring (10) is an inverted "T" shape. The limiting rotating ring (11) has a sliding ring cavity that cooperates with the guide ring (10). The circular limiting rotating ring (11) is rotatably sleeved on the outside of the guide ring (10). The limiting rotating ring (11) matches the surface opposite to the fixed steel seat (7).

7. The adjustable fan blade structure of a wind turbine generator according to claim 1, characterized in that: The mounting flange (8) has a insertion hole that mates with the pre-embedded bolt sleeve (9). The inner and outer diameters of the mounting flange (8) are the same as the inner and outer diameters of the limiting rotating ring (11).

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