Wind power blade bolt sleeve

Abstract

The utility model provides a wind power blade bolt sleeve which comprises a nut sleeve body of a long tubular structure, and the nut sleeve body is used for being embedded in the inner end portion of a wind power blade. An internal thread section is arranged in the middle of the inner side of the nut sleeve body; a cavity for resin for manufacturing the wind power blade to flow in is formed in the inner side of the right end of the nut sleeve body, the inner end of the cavity is connected with one end of the internal thread section, an embedding area for embedding a sealing plug is formed at the inner end of the cavity, and the sealing plug is used for preventing the resin for manufacturing the wind power blade from flowing into the internal thread section; a plurality of annular grooves which are distributed at intervals in the axial direction of the nut sleeve body are formed in the outer wall of the nut sleeve body, and the annular grooves are used for being embedded with resin for manufacturing the wind power blade so as to improve the anti-disengaging effect of the nut sleeve body and the wind power blade; after being pre-embedded in the inner end part of the wind power blade, the anti-falling device has the advantage of high connection strength with the wind power blade, namely the anti-falling device has the advantage of good anti-falling effect with the wind power blade.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power blade accessories, and particularly relates to a wind power blade bolt sleeve. Background Art

[0002] The wind power blade bolt sleeve is a connecting piece used for being embedded in the inner end of the wind power blade. An internal thread section is arranged in the middle of the inner side of the wind power blade bolt sleeve, and the internal thread section is used for being in threaded connection with the outer end of a bolt radially fixed on the rotating shaft of the wind turbine generator to radially fix the nut sleeve body to the rotating shaft of the wind turbine generator; however, in the existing structure of the wind power blade bolt sleeve at present, the outer surface of the wind power blade bolt sleeve is a smooth annular surface. Therefore, after the wind power blade bolt sleeve is embedded in the wind power blade, there is a situation that the connection strength between the wind power blade bolt sleeve and the wind power blade is not high, that is, it is easy to cause the wind power blade bolt sleeve to break away from the wind power blade, that is, there is a defect that the embedding reliability of the wind power blade bolt sleeve and the wind power blade is poor. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a wind power blade bolt sleeve which has the advantages of high connection strength with the wind power blade after being embedded in the inner end of the wind power blade, that is, has the advantage of good anti - detachment effect with the wind power blade.

[0004] The utility model provides a wind power blade bolt sleeve, which comprises a nut sleeve body of a long - shaped tubular structure for being embedded in the inner end of the wind power blade; an internal thread section is arranged in the middle of the inner side of the nut sleeve body for being in threaded connection with the outer end of a bolt radially fixed on the rotating shaft of the wind turbine generator to radially fix the nut sleeve body to the rotating shaft of the wind turbine generator; a cavity for allowing the resin for manufacturing the wind power blade to flow in is formed inside the right end of the nut sleeve body, the inner end of the cavity is connected with one end of the internal thread section, an embedding area for embedding a sealing plug is formed at the inner end of the cavity, and the sealing plug is used for blocking the resin for manufacturing the wind power blade from flowing into the internal thread section; a plurality of annular grooves are arranged at intervals along the axial direction of the nut sleeve body on the outer wall of the nut sleeve body, and the annular grooves are used for being embedded with the resin for manufacturing the wind power blade to improve the anti - detachment effect between the nut sleeve body and the wind power blade.

[0005] After the utility model adopts the above structure, because a plurality of annular grooves are arranged at intervals along the axial direction of the nut sleeve body on the outer wall of the nut sleeve body, after the nut sleeve body is embedded in the inner end of the wind power blade, under the embedding action of the annular grooves and the resin for manufacturing the wind power blade, the anti - detachment effect between the nut sleeve body and the wind power blade can be improved, that is, the reliability after the wind power blade bolt sleeve is embedded in the wind power blade can be improved.

[0006] In a possible implementation, a circular step is formed at the connection between the inner end of the embedding area and one end of the internal thread section. The circular step is used to abut against the sealing plug and support the sealing plug. After setting the circular step at the connection between the inner end of the embedding area and one end of the internal thread section, after the sealing plug is loaded into the embedding area, the sealing plug can finally abut against the circular step, so as to realize the limiting and supporting effects on the sealing plug, that is, the reliable assembly of the sealing plug with the nut sleeve body can be realized.

[0007] In a possible implementation, the inner peripheral wall of the cavity gradually expands radially outward towards the nut sleeve body. After adopting this structure, since the inner peripheral wall of the cavity gradually expands radially outward towards the nut sleeve body, it is convenient for the resin used to manufacture the wind turbine blade to flow into the cavity. After the resin is cured, it can be embedded and fixed with the cavity. And because the nut sleeve body is embedded in the inner end of the wind turbine blade, after the resin is cured, the nut sleeve body can be reliably embedded and fixed with the wind turbine blade.

[0008] In a possible implementation, an annular chamfered surface is provided at the other end of the internal thread section. The annular chamfered surface is used to cooperate with and guide the outer end of the bolt radially fixed on the rotating shaft of the wind turbine generator so as to facilitate the outer end of the bolt to be screwed into the internal thread section. After setting the annular chamfered surface at the other end of the internal thread section, when the nut sleeve body is threadedly connected with the outer end of the bolt radially fixed on the rotating shaft of the wind turbine generator, the annular chamfered surface can cooperate with and guide the outer end of the bolt radially fixed on the rotating shaft of the wind turbine generator so as to facilitate the outer end of the bolt to be screwed into the internal thread section, that is, it can make the threaded connection between the nut sleeve body and the bolt convenient, and also make the assembly of the wind turbine blade and the rotating shaft of the wind turbine generator convenient.

[0009] In a possible implementation, the inner side wall of each annular groove forms an arc surface. After adopting this structure, the resin used to manufacture the wind turbine blade can flow into the annular groove more smoothly, so as to facilitate the resin to fill the annular groove and adhere to the inner wall of the annular groove. And after the resin is cured, the fixing firmness between the nut sleeve body and the wind turbine blade made of resin can be improved.

[0010] In a possible implementation, the outer peripheral wall of the nut sleeve body between every two adjacent annular grooves forms an arc transition surface. After adopting this structure, the resin used to manufacture the wind turbine blade can be more reliably bonded and fixed to the outer peripheral wall of the nut sleeve body between every two adjacent annular grooves, that is, after the resin is cured, the fixing firmness between the nut sleeve body and the wind turbine blade made of resin can be improved. Description of the Drawings

[0011] Figure 1This is the front view structural schematic diagram of the present utility model;

[0012] Figure 2 This is the sectional view structural schematic diagram of the present utility model. Specific embodiments

[0013] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adjust them as needed to adapt to specific application scenarios.

[0014] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0015] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature.

[0016] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] See Figure 1-2As shown in the figure, an embodiment of the present application discloses a bolt sleeve for a wind turbine blade, which includes a nut sleeve body 1 with a long tubular structure. The nut sleeve body 1 is used to be embedded in the inner end of the wind turbine blade. In the middle of the inner side of the nut sleeve body 1, there is an internal thread section 11, which is used to be threadedly connected with the outer end of a bolt radially fixed on the rotating shaft of the wind turbine generator to radially fix the nut sleeve body 1 to the rotating shaft of the wind turbine generator. On the inner side of the right end of the nut sleeve body 1, there is a cavity 12 for the resin used to manufacture the wind turbine blade to flow in. The inner end of the cavity 12 is connected to one end of the internal thread section 11. At the inner end of the cavity 12, there is an installation area 13 for embedding a sealing plug. The sealing plug is used to block the resin for manufacturing the wind turbine blade from flowing into the internal thread section 11. On the outer wall of the nut sleeve body 1, there are several annular grooves 14 spaced along the axial direction of the nut sleeve body 1. The annular grooves 14 are used to be embedded with the resin for manufacturing the wind turbine blade to improve the anti - detachment effect between the nut sleeve body 1 and the wind turbine blade.

[0018] After the present utility model adopts the above - mentioned structure, since there are several annular grooves spaced along the axial direction of the nut sleeve body on the outer wall of the nut sleeve body, after the nut sleeve body is embedded in the inner end of the wind turbine blade, under the embedding action of the annular grooves and the resin for manufacturing the wind turbine blade (the uncured resin can enter into each annular groove, and after the resin cures, it can be embedded with the annular groove, so that the nut sleeve body is embedded in the wind turbine blade), the anti - detachment effect between the nut sleeve body and the wind turbine blade can be improved, that is, the reliability of the bolt sleeve for the wind turbine blade after being embedded in the wind turbine blade can be improved.

[0019] At the connection between the inner end of the installation area 13 and one end of the internal thread section 11, there is an annular step 15, which is used to abut against the sealing plug and support the sealing plug. By setting the annular step at the connection between the inner end of the installation area and one end of the internal thread section, after the sealing plug is installed in the installation area, the sealing plug can finally abut against the annular step, so as to realize the limiting and supporting functions of the sealing plug, that is, the reliable assembly of the sealing plug with the nut sleeve body can be realized.

[0020] The inner peripheral wall of the cavity 12 gradually expands radially outward from the inside towards the nut sleeve body 1. After adopting this structure, since the inner peripheral wall of the cavity gradually expands radially outward from the inside towards the nut sleeve body, it is convenient for the resin used to manufacture the wind turbine blade to flow into the cavity. After the resin cures, it can be fixedly embedded with the cavity. And because the nut sleeve body is embedded in the inner end of the wind turbine blade, after the resin cures, the nut sleeve body can be reliably fixedly embedded with the wind turbine blade.

[0021] At the other end of the internal thread section 11, there is provided an annular chamfered surface 16, and the annular chamfered surface 16 is used to cooperate and guide with the outer end portion of the bolt radially fixed on the rotating shaft of the wind turbine so as to facilitate the screwing of the outer end portion of the bolt into the internal thread section 11; after providing the annular chamfered surface at the other end of the internal thread section, when the nut sleeve body is threadedly connected with the outer end portion of the bolt radially fixed on the rotating shaft of the wind turbine, the annular chamfered surface can cooperate and guide with the outer end portion of the bolt radially fixed on the rotating shaft of the wind turbine so as to facilitate the screwing of the outer end portion of the bolt into the internal thread section, that is, it can make the threaded connection between the nut sleeve body and the bolt convenient, and also can bring convenience to the assembly of the wind turbine blade and the rotating shaft of the wind turbine.

[0022] The inner side wall of each annular groove 14 forms an arc surface; after adopting this structure, the resin used to manufacture the wind turbine blade can flow into the annular groove more smoothly, so as to facilitate the resin to fill the annular groove and adhere to the inner wall of the annular groove, and after the resin is cured, it can improve the fixing firmness between the nut sleeve body and the wind turbine blade made of resin.

[0023] The outer peripheral wall of the nut sleeve body 1 between every two adjacent annular grooves 14 forms an arc transition surface 17; after adopting this structure, it can make the resin used to manufacture the wind turbine blade more reliably bond and fix with the outer peripheral wall of the nut sleeve body between every two adjacent annular grooves, that is, after the resin is cured, it can improve the fixing firmness between the nut sleeve body and the wind turbine blade made of resin.

[0024] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wind turbine blade bolt sleeve, comprising a nut sleeve body (1) of an elongated tubular structure, wherein the nut sleeve body (1) is used to be embedded in the inner end of a wind turbine blade; characterized in that: An internal thread section (11) is provided at the middle of the inner side of the nut sleeve body (1), and the internal thread section (11) is used to be threadedly connected with the outer end of a bolt radially fixed on the rotating shaft of the wind turbine generator set so as to radially fix the nut sleeve body (1) to the rotating shaft of the wind turbine generator set; a cavity (12) is formed on the inner side of the right end of the nut sleeve body (1) for resin for manufacturing wind turbine blades to flow into, the inner end of the cavity (12) is connected to one end of the internal thread section (11), and an embedding area (13) for embedding a sealing plug is formed at the inner end of the cavity (12), and the sealing plug is used to prevent the resin for manufacturing wind turbine blades from flowing into the internal thread section (11); a plurality of annular grooves (14) are provided on the outer wall of the nut sleeve body (1) at intervals along the axial direction of the nut sleeve body (1), and the annular grooves (14) are used to be embedded with the resin for manufacturing wind turbine blades so as to improve the anti-slip effect of the nut sleeve body (1) and the wind turbine blades.

2. The wind turbine blade bolt sleeve according to claim 1, characterized in that: An annular step (15) is formed at the connection between the inner end of the embedding area (13) and one end of the internal thread section (11), and the annular step (15) is used to abut against the sealing plug and provide support for the sealing plug.

3. The wind turbine blade bolt sleeve according to claim 1 or 2, characterized in that: The inner peripheral wall of the cavity (12) gradually expands from the inside to the outside in the radial direction of the nut sleeve body (1).

4. The wind turbine blade bolt sleeve according to claim 1, characterized in that: An annular chamfered surface (16) is provided on the other end of the internal thread section (11), and the annular chamfered surface (16) is used to cooperate with and guide the outer end of a bolt radially fixed on the rotating shaft of the wind turbine generator set so as to facilitate the outer end of the bolt to be screwed into the internal thread section (11).

5. The wind turbine blade bolt sleeve according to claim 1, characterized in that: The inner side wall of each annular groove (14) forms an arc surface.

6. The wind turbine blade bolt sleeve according to claim 5, characterized in that: The outer peripheral wall of the nut sleeve body (1) between each two adjacent annular grooves (14) forms an arc transition surface (17).

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