A protective structure for a blade joint of a wind turbine generator system

Abstract

The utility model discloses a kind of protective structures of wind turbine blade connecting place, including cover one, and the both ends are formed with connector;Cover two, both ends are in the connector, and with cover one constitute complete annular hoop structure;Sealing assembly is provided in the inboard of cover one, cover two, and the sealing assembly includes abutting piece and sealing piece;Among them, the sealing piece is set in the top position of cover one, cover two;In the utility model, by adding sealing assembly in the connecting position and end position of rain cover, double sealing effect is realized, rainproof performance is significantly improved, this design not only enhances the reliability of sealing, but also effectively prevents the occurrence of rainwater leakage phenomenon, simultaneously, the sealing assembly structure is simple, easy to install, can easily integrate into existing rain cover structure, perfectly make up the deficiency of previous design in use, provide powerful guarantee for long-term stable operation of wind turbine.

Description

Technical Field

[0001] This utility model belongs to the field of protective structure technology, specifically relating to a protective structure at the blade connection of a wind turbine generator set. Background Technology

[0002] The protective structure at the joint of wind turbine blades generally refers to the rain cover of the wind turbine blades. This protective cover is a key protective structure installed at the root of the blade or the hub joint. It is mainly used to prevent rainwater from entering the joint and avoid corrosion, short circuit or mechanical failure. It may also have functions such as dust protection and impact resistance.

[0003] In actual wind turbine operation, the rain covers currently widely used are typically installed at the blade tips, a critical location, using bolts. The sealing function of the rain cover mainly relies on the pressure generated when the bolts are tightened to ensure a tight seal between the cover and the blade tip, thus preventing rainwater intrusion. However, this bolt-based sealing method is relatively simple, and rainwater leakage may occur over long-term use. This could not only damage the precision components inside the blade but also affect the normal operation and service life of the entire wind turbine. Utility Model Content

[0004] The purpose of this utility model is to provide a protective structure for the connection of wind turbine blades, so as to solve the problem of the limited sealing effect of existing rain covers in use as mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a protective structure for the connection of wind turbine blades, comprising... One of the cover bodies has connectors at both ends; The second cover has both ends inside the connector and together with the first cover, it forms a complete circular clamp structure. A sealing assembly is provided on the inner side of the first and second covers, the sealing assembly including a clamping member and a sealing member; The sealing element is located at the top of the first and second covers, while the abutting element is located on the inner bottom of the first and second covers, with the bottom end of the abutting element protruding to the outer side of the first cover.

[0006] Preferably, a sealing hole is formed on the inner side of the corner between the first cover and the connector, while semi-circular holes with the same diameter as the sealing hole are formed at both ends of the second cover. The sealing element includes a rubber column that fits into the sealing hole and the semi-circular hole, wherein the rubber column is not shown in the figure, and also includes a rubber sheet, the top of which is bent and overlapped on the cover body one and the cover body two.

[0007] Preferably, two rubber sheets are provided, which are respectively attached to the inner walls of the first cover and the second cover. The bent position of the top of the rubber sheet covers the joint position of the first cover and the second cover, thereby achieving a seal. At the same time, the first cover and the second cover are no longer directly connected to the blade. The rubber sheet is deformed by locking, which can improve the sealing performance and enhance the installation stability.

[0008] Preferably, the clamping component includes a rubber ring, a bearing, an inner ring, a support ring, and a spring; The rubber ring is placed at the bottom opening of the first and second covers, and the bearing is sleeved on the outside of the rubber ring, with the inner wall of the bearing fixedly connected to the rubber ring. The inner ring is fitted onto the inner wall of cover body one and cover body two. The inner ring is sleeved on the outside of the rubber ring and fixed to the outer wall of the bearing. The support ring is fixed to the inner wall of the first and second covers. The two ends of the spring are fixed to the top of the inner ring and the bottom of the support ring, respectively. During installation, the connection between the blade and the generator set is covered by the bottom of the first and second covers, and the rubber ring is fitted to the hub of the generator set to achieve a complete seal, preventing external rainwater from entering the generator set. The spring's rebound ensures that the rubber ring is always in a fitted state. When the first and second covers rotate with the blade, due to the presence of the bearing, the outer ring of the bearing, the inner ring, the support ring, and the spring rotate synchronously, while the rubber ring does not rotate, avoiding wear of the rubber ring.

[0009] Preferably, the inner ring has a horizontal portion and a vertical portion, and the spring is located in the horizontal portion of the inner ring.

[0010] Preferably, the abutting member is provided in two sets, and the two sets of abutting members are respectively adapted to the first cover and the second cover.

[0011] Preferably, studs with through connectors are fixed at both ends of the second cover, and nuts are screwed onto the studs to fix the first cover and the second cover.

[0012] Compared with the prior art, the beneficial effects of this utility model are: In this invention, by adding sealing components at the connection and end positions of the rain cover, a double sealing effect is achieved, significantly improving the rainproof performance. This design not only enhances the reliability of the seal but also effectively prevents rainwater leakage. At the same time, the sealing component has a simple structure, is easy to install, and can be easily integrated into the existing rain cover structure, perfectly making up for the shortcomings of previous designs in use. This improved solution provides a strong guarantee for the long-term stable operation of wind turbine generator sets. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram showing the connection between the cover body 2 of this utility model and the rubber sheet and rubber ring; Figure 3 This utility model Figure 2 Enlarged view of region A in the middle; Figure 4 This is a schematic diagram showing the connection between cover body one and cover body two of this utility model; Figure 5 This utility model Figure 4 Enlarged schematic diagram of region B in the middle.

[0014] In the picture: 100. Cover body one; 101. Connector; 102. Sealing hole; 200. Cover body two; 201. Stud; 300. Rubber sheet; 400. Rubber ring; 401. Bearing; 402. Inner ring; 403. Support ring; 404. Spring. Detailed Implementation

[0015] 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.

[0016] Please see Figures 1 to 5 This utility model provides a technical solution: a protective structure for the connection of wind turbine blades, including... The cover body 100 has connectors 101 formed at both ends; The second cover 200 has both ends inside the connector 101 and forms a complete circular clamp structure with the first cover 100. A sealing assembly is provided on the inner side of cover 100 and cover 200, the sealing assembly including a clamping member and a sealing member; The sealing element is located at the top of the first cover 100 and the second cover 200, while the abutting element is located at the bottom inner side of the first cover 100 and the second cover 200, with the bottom end of the abutting element protruding to the outside of the first cover 100.

[0017] In this embodiment, preferably, a sealing hole 102 is formed on the inner side of the corner between the cover 100 and the connector 101, while the two ends of the cover 200 are formed with semi-circular holes of the same diameter as the sealing hole 102. The sealing element includes a rubber column that fits into the sealing hole 102 and the semi-circular hole, wherein the rubber column is not shown in the figure, and also includes a rubber sheet 300, the top end of which is bent and overlapped on the cover body 100 and the cover body 200.

[0018] In this embodiment, preferably, two rubber sheets 300 are provided. The two rubber sheets 300 are respectively attached to the inner walls of the first cover 100 and the second cover 200. The bent position of the top of the rubber sheet 300 covers the joint position of the first cover 100 and the second cover 200, thereby achieving a seal. At the same time, the first cover 100 and the second cover 200 are no longer directly connected to the blade. By locking, the rubber sheet 300 is compressed and deformed, which can improve the sealing performance and enhance the installation stability.

[0019] In this embodiment, preferably, the clamping component includes a rubber ring 400, a bearing 401, an inner ring 402, a support ring 403, and a spring 404; The rubber ring 400 is placed at the bottom opening of the cover body 100 and the cover body 200, while the bearing 401 is sleeved on the outside of the rubber ring 400, and the inner wall of the bearing 401 is fixedly connected to the rubber ring 400. The inner ring 402 is fitted to the inner wall of the cover body 100 and the cover body 200. The inner ring 402 is sleeved on the outside of the rubber ring 400 and fixed to the outer wall of the bearing 401. The support ring 403 is fixed to the inner wall of the first cover 100 and the second cover 200. The two ends of the spring 404 are fixed to the top of the inner ring 402 and the bottom of the support ring 403, respectively. During installation, the connection end of the blade and the generator set is covered by the bottom of the first cover 100 and the second cover 200, and the rubber ring 400 is fitted to the hub part of the generator set to achieve a complete seal and prevent external rainwater from entering the generator set. The rebound of the spring 404 ensures that the rubber ring 400 is always in a fitted state. When the first cover 100 and the second cover 200 rotate with the blade, due to the presence of the bearing 401, the outer ring of the bearing 401, the inner ring 402, the support ring 403 and the spring 404 rotate synchronously, while the rubber ring 400 does not rotate, thus avoiding wear of the rubber ring 400.

[0020] In this embodiment, preferably, the inner ring 402 has a horizontal portion and a vertical portion, and the spring 404 is located on the horizontal portion of the inner ring 402.

[0021] In this embodiment, preferably, two sets of abutting members are provided, and the two sets of abutting members are respectively adapted to cover body 100 and cover body 200.

[0022] In this embodiment, preferably, studs 201 through connectors 101 are fixed at both ends of the second cover 200, and nuts are screwed on the studs 201 to fix the first cover 100 and the second cover 200.

[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. A protective structure for the connection of wind turbine blades, comprising: The cover body (100) has connectors (101) at both ends; The second cover (200) has both ends inside the connector (101) and together with the first cover (100) forms a complete circular clamp structure; Its features are: A sealing assembly is provided on the inner side of the first cover (100) and the second cover (200), the sealing assembly including a clamping member and a sealing member; The sealing element is located at the top of the first cover (100) and the second cover (200), while the abutting element is located on the inner side of the bottom of the first cover (100) and the second cover (200), with the bottom end of the abutting element protruding to the outer side of the first cover (100).

2. The protective structure at the blade connection of a wind turbine generator set according to claim 1, characterized in that: A sealing hole (102) is formed on the inner side of the corner between the first cover (100) and the connector (101), while the two ends of the second cover (200) are formed with semi-circular holes of the same diameter as the sealing hole (102). The sealing element includes a rubber column that fits into the sealing hole (102) and the semi-circular hole, and also includes a rubber sheet (300). The top end of the rubber sheet (300) is bent and overlapped on the cover body one (100) and the cover body two (200).

3. The protective structure at the blade connection of a wind turbine generator set according to claim 2, characterized in that: Two rubber sheets (300) are provided, and the two rubber sheets (300) are respectively attached to the inner walls of the first cover (100) and the second cover (200). The bent position of the top of the rubber sheet (300) covers the joint position of the first cover (100) and the second cover (200).

4. The protective structure at the blade connection of a wind turbine generator set according to claim 1, characterized in that: The clamping component includes a rubber ring (400), a bearing (401), an inner ring (402), a support ring (403), and a spring (404). The rubber ring (400) is placed at the bottom opening of the cover body one (100) and the cover body two (200), and the bearing (401) is sleeved on the outside of the rubber ring (400), and the inner wall of the bearing (401) is fixedly connected to the rubber ring (400). The inner ring (402) is fitted to the inner wall of the first cover (100) and the second cover (200). The inner ring (402) is sleeved on the outside of the rubber ring (400) and fixed to the outer wall of the bearing (401). The support ring (403) is fixed to the inner wall of the first cover (100) and the second cover (200), and the two ends of the spring (404) are respectively fixed to the top end of the inner ring (402) and the bottom end of the support ring (403).

5. The protective structure at the blade connection of a wind turbine generator set according to claim 4, characterized in that: The inner ring (402) has a horizontal portion and a vertical portion, and the spring (404) is located on the horizontal portion of the inner ring (402).

6. The protective structure at the blade connection of a wind turbine generator set according to claim 4, characterized in that: The abutment is provided in two sets, and the two sets of abutment are respectively adapted to the first cover (100) and the second cover (200).

7. The protective structure at the blade connection of a wind turbine generator set according to claim 1, characterized in that: The two ends of the cover body 2 (200) are fixed with studs (201) that pass through the connector (101), and nuts are screwed on the studs (201).

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