阅读说明：本技术 风机叶片和风力发电机 (Fan blade and wind driven generator ) 是由 路绪恒 王国军 于 2021-08-31 设计创作，主要内容包括：本申请提供一种风机叶片和风力发电机。风机叶片包括叶尖段、叶根段及连接件。在叶尖段的第一连接端与叶根段的第二连接端对接后,采用由热塑性材料制成的连接件并通过加热、加压的方式与第一连接端和第二连接端粘接固定。本申请提供一种风力发电机。如此设置,使叶尖段与叶根段的连接处的质量轻,连接更加可靠,从而对整机载荷影响较小,且结构简单,便于工厂生产以及风场现场操作。(The application provides a fan blade and a wind driven generator. The fan blade comprises a blade tip section, a blade root section and a connecting piece. After the first connecting end of the blade tip section is in butt joint with the second connecting end of the blade root section, a connecting piece made of thermoplastic materials is adopted and is fixedly bonded with the first connecting end and the second connecting end in a heating and pressurizing mode. The present application provides a wind power generator. So set up, make the quality of the junction of leaf tip section and leaf root section light, connect more reliably to it is less to carry the load influence to the whole machine, and simple structure, the factory production and the field operation of wind field of being convenient for.)

1. A fan blade is characterized by comprising a blade tip section, a blade root section and a connecting piece; the blade tip section comprises a first connecting end, the blade root section comprises a second connecting end, the connecting piece is made of thermoplastic materials, and after the connecting piece is heated and softened, the connecting piece is fixedly bonded with the first connecting end and the second connecting end through pressure, so that the blade tip section is connected with the blade root section.

2. The fan blade of claim 1 wherein the surface of the first connection end is lower than the surface of the remainder of the tip section to form a first recessed space at the periphery of the first connection end; the connecting piece is accommodated in the first concave space; the surface of the second connection end is lower than the surface of the rest part of the blade root section so as to form a second concave space at the periphery of the second connection end; the connecting member is accommodated in the first recessed space and the second recessed space.

3. The fan blade of claim 2 wherein the depth of the first recessed space and the depth of the second recessed space are the same as the thickness of the connector.

4. The fan blade of claim 1 wherein the connector comprises a first connector and a second connector connected end to end; the first connecting piece is connected with the second connecting piece, and the first connecting end and the second connecting end are wrapped together.

5. The fan blade of claim 4, wherein the tip section comprises a first end and a second end disposed perpendicular to the length direction, the first connector and the second connector meeting to form a first seam and a second seam, the first seam located at the first end and the second seam located at the second end.

6. The fan blade of claim 1, wherein the tip section comprises a tip section spar, a width of the tip section spar increases along a length of the tip section, and a width of a large end of the tip section spar is equal to a width of the first connection end.

7. The fan blade of claim 1, wherein the root section comprises a root section spar having a width that gradually increases along a length of the root section, and a width of a large end of the root section spar is equal to a width of the second connection end.

8. The fan blade of claim 1, wherein the connector outer profile surface matches the outer profile surface of the root segment and the outer profile surface of the tip segment.

9. The fan blade of claim 1 wherein the first connection end and/or the second connection end are made of a thermoset material.

10. A wind power generator, comprising:

a tower;

a nacelle disposed atop the tower;

a wind rotor arranged at the front end of the nacelle, the wind rotor comprising a fan blade according to any of the claims 1 to 9.

Technical Field

The application relates to the technical field of wind power, in particular to a fan blade and a wind driven generator.

Background

The segmented blade is a new technology developed for dividing a conventional fan blade into two or more segments so as to facilitate transportation of a longer fan blade in a mountain area. In the related art, the weight of the joint of the tip section and the root section divided into two sections is significantly increased, resulting in a large increase in the weight and cost of the fan blade itself, and inconvenience in factory machining and wind field implementation.

Disclosure of Invention

The application provides a fan blade and a wind driven generator aiming at reducing the mass of the joint of a blade tip section and a blade root section.

The application provides a fan blade, wherein includes:

a leaf tip section, a leaf root section and a connecting piece; the blade tip section comprises a first connecting end, the blade root section comprises a second connecting end, the connecting piece is made of thermoplastic materials, and after the connecting piece is heated and softened, the connecting piece is fixedly bonded with the first connecting end and the second connecting end through pressure, so that the blade tip section is connected with the blade root section.

Optionally, the surface of the first connection end is lower than the surface of the rest part of the blade tip section, so as to form a first concave space at the periphery of the first connection end; the surface of the second connection end is lower than the surface of the rest part of the blade root section so as to form a second concave space at the periphery of the second connection end; the connecting member is accommodated in the first recessed space and the second recessed space.

Optionally, the depth of the first concave space and the depth of the second concave space are the same as the thickness of the connecting piece.

Optionally, the connecting piece comprises a first connecting piece and a second connecting piece which are connected end to end; the first connecting piece and the second connecting piece jointly wrap the first connecting end and the second connecting end.

Optionally, the blade tip section includes a first end and a second end that are perpendicular to the length direction, the first connecting piece and the second connecting piece are connected to form a first seam and a second seam, the first seam is located at the first end, and the second seam is located at the second end.

Optionally, the blade tip section includes a blade tip section main beam, the width of the blade tip section main beam gradually increases along the length direction of the blade tip section, and the width of the large end of the blade tip section main beam is equal to the width of the first connection end.

Optionally, the blade root section includes a blade root section main beam, the width of the blade root section main beam gradually increases along the length direction of the blade root section, and the width of the large end of the blade root section main beam is equal to the width of the second connection end.

Optionally, the outer contour surface of the connecting piece is matched with the outer contour surface of the blade root section and the outer contour surface of the blade tip section.

Optionally, the first connection end and the second connection end are made of a thermosetting material.

The present application further provides a wind power generator, comprising:

a tower;

the engine room is arranged at the top end of the tower;

the wind wheel is arranged at the front end of the cabin and comprises the fan blade.

The application provides a fan blade, including tip section, blade root section and connecting piece. After the first connecting end of the blade tip section is in butt joint with the second connecting end of the blade root section, a connecting piece made of thermoplastic materials is adopted and is adhered and fixed with the surfaces of the first connecting end and the second connecting end in a heating and pressurizing mode. So set up, make the quality of the junction of leaf tip section and leaf root section light, connect more reliably to it is less to carry the load influence to the whole machine, and simple structure, the factory production and the field operation of wind field of being convenient for.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic view of a portion of a wind turbine provided herein;

FIG. 2 illustrates an exploded front view of a tip section and a root section of a wind turbine blade provided herein;

FIG. 3 is an exploded block diagram illustrating a tip section, a root section, and a connection piece of an embodiment of a wind turbine blade provided herein;

FIG. 4 illustrates a connection diagram of a tip section, a root section, and a connector of an embodiment of a wind turbine blade provided herein.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The application provides a fan blade, including blade tip section, blade root section and connecting piece. The tip section includes a first link end. The root section includes a second connection end. The connecting piece is made of thermoplastic material. And after the connecting piece is heated and softened, the connecting piece is adhered and fixed with the first connecting end and the second connecting end through pressure, so that the blade tip section is connected with the blade root section.

The application provides a wind driven generator, including the pylon, set up in the cabin of pylon top, set up in the wind wheel of cabin front end. The wind wheel includes fan blades.

The application provides a fan blade, including blade tip section, blade root section and connecting piece. After the first connecting end of the blade tip section is in butt joint with the second connecting end of the blade root section, a connecting piece made of thermoplastic materials is adopted and is fixedly bonded with the surfaces of the first connecting end and the second connecting end in a heating and pressurizing mode. So set up, make the quality of the junction of leaf tip section and leaf root section light, connect more reliably to it is less to carry the load influence to the whole machine, and simple structure, the factory production and the wind field operation of being convenient for.

Fig. 1 is a partial schematic structural view of a wind turbine 11 provided in the present application. As shown in fig. 1, the wind turbine 11 includes a tower 12, a nacelle 13 disposed at a top end of the tower 12, and a wind turbine 14 disposed at a front end of the nacelle 13. The wind wheel 14 comprises fan blades 1. The number of fan blades 1 is not limited, including but not limited to three.

Fig. 2 is an exploded front view of a blade tip section 2 and a blade root section 3 of a fan blade 1 according to the present application. Fig. 3 is an exploded structural view of a tip section 2, a root section 3 and a connecting member 4 of an embodiment of a fan blade 1 provided by the present application. Referring to fig. 2 and 3, a fan blade 1 includes a tip section 2, a root section 3, and a connector 4. The blade tip section 2 and the blade root section 3 are arranged in a split mode, and the connecting piece 4 is used for connecting the blade tip section 2 and the blade root section 3. In particular, the tip section 2 comprises a first connection end 5 at the end. The blade root section 3 comprises a second connection end 6 at the end. The connecting piece 4 is made of a thermoplastic material and can be softened when heated. And after being heated and softened, the connecting piece 4 is adhered and fixed with the first connecting end 5 and the second connecting end 6 through pressure, so that the blade tip section 2 is connected with the blade root section 3. So set up, make the quality of the junction of tip section 2 and blade root section 3 light, connect more reliably to it is less to carry the load influence to the whole machine, and simple structure, the factory production and the wind field operation of being convenient for.

The fan blade 1 adopts the blade tip section 2 and the blade root section 3 to set up in segments, can reduce the difficulty of transporting fan blade 1, for example, can carry out the segmentation transportation with blade tip section 2 and blade root section 3, transport to wind field after the rethread connecting piece 4 with blade tip section 2 and blade root section 3 link together.

The connecting piece 4 is made of a thermoplastic material. Thermoplastic material is a plastic having the property of softening when heated and hardening when cooled. The thermoplastic material is light in weight, the weight of the joint of the blade tip section 2 and the blade root section 3 cannot be greatly increased, and the overall load on the fan is small. Moreover, the thermoplastic material can be molded for many times, so that later maintenance is facilitated. In other embodiments, the connecting member 4 may be heated and pressurized simultaneously by using a device, which may reduce the operation time.

Referring to fig. 2, in some embodiments, the tip section 2 includes a tip section girder 19, the width of the tip section girder 19 gradually increases along the length direction of the tip section 2 (e.g., the direction of the left arrow in fig. 2), and the width of the large end of the tip section girder 19 (e.g., the connection between the tip section girder 19 and the first connection end 5 in fig. 2) is equal to the width of the first connection end 5. The width of the main beam 19 of the tip section gradually increases towards the direction of the root section 3 until the width of the large end of the main beam is equal to the width of the first connecting end 5, so that the main beam can be smoothly transited with the first connecting end 5 to avoid stress concentration on the tip section 2, and the load transfer of the whole machine is more uniform.

In some embodiments, the root segment 3 includes a root segment girder 20, the width of the root segment girder 20 gradually increases along the length direction of the root segment 3 (as indicated by the arrow on the right side in fig. 2), and the width of the large end of the root segment girder 20 (as indicated by the connection between the root segment girder 20 and the second connection end 6 in fig. 2) is equal to the width of the second connection end 6. The width of the main beam 20 of the blade root section gradually increases towards the direction of the blade tip section 2 until the width of the large end of the main beam is equal to that of the second connecting end 6, so that the main beam can smoothly transition with the second connecting end 6 to avoid stress concentration on the blade root section 3, and the load transmission of the whole machine is more uniform.

In some embodiments, the connector 4 comprises a first connector 9 and a second connector 10 connected end to end. The first connecting piece 9 and the second connecting piece 10 jointly wrap the first connecting end 5 and the second connecting end 6. That is to say, the connecting member 4 adopts a split structure and at least includes two parts, namely, the first connecting member 9 and the second connecting member 10, for example, the first connecting member 9 can wrap the upper side surfaces of the first connecting end 5 and the second connecting end 6, and the second connecting member 10 can wrap the lower side surfaces of the first connecting end 5 and the second connecting end 6, so as to achieve the common wrapping of the first connecting end 5 and the second connecting end 6. In this way, the first connection end 5 and the second connection end 6 can be connected in sections through the first connection piece 9 and the second connection piece 10, so that the connection difficulty is reduced. In addition, the first connecting piece 9 and the second connecting piece 10 are bonded on the surfaces of the first connecting end 5 and the second connecting end 6 and connected end to end, and are wrapped on the surfaces of the first connecting end 5 and the second connecting end 6 in an all-around manner by 360 degrees, so that the situation that the connecting piece 4 is not covered on some parts of the first connecting end 5 and/or the second connecting end 6, the connection reliability of the blade tip section 2 and the blade root section 3 is influenced, and the overall attractiveness of the fan blade 1 is influenced can be avoided. In some embodiments, the first connector 9 and the second connector 10 are each provided as a plate-like structure.

As shown in fig. 3, in some embodiments, the surface of the first connection end 5 is lower than the surface of the rest of the tip section 2 to form a first recessed space 7 at the periphery of the first connection end 5. The surface of the second connection end 6 is lower than the surface of the rest of the root section 3 to form a second recessed space 8 at the periphery of the second connection end 6. The connecting piece 4 is accommodated in the first recessed space 7 and the second recessed space 8. Specifically, the first connection end 5 is recessed into the blade tip section 2 by a certain thickness, so that the blade tip section 2 can form a certain size of accommodation space at the first connection end 5, and the accommodation space is a first recessed space 7. The second connection end 6 is recessed into the blade root section 3 by a certain thickness, so that the blade root section 3 can form a certain size of accommodation space at the second connection end 6, and the accommodation space is a second recessed space 8. The first concave space 7 and the second concave space 8 are communicated after being butted, the connecting piece 4 is accommodated in the first concave space 7 and the second concave space 8 and is fixedly bonded with the first connecting end 5 and the second connecting end 6. Therefore, the softened connecting piece 4 can be filled in the first sunken space 7 and the second sunken space 8, the connecting piece 4 is prevented from protruding out of the outer surfaces of the blade tip section 2 and the blade root section 3, the size of the connecting piece 4 can be set according to the sizes of the first sunken space 7 and the second sunken space 8, the appropriate using amount of the connecting piece 4 is ensured, and the weight of the whole machine cannot be greatly increased.

In some embodiments, the depth of the first recessed space 7 and the depth of the second recessed space 8 are the same as the thickness of the connecting member 4. Make connecting piece 4 bond to fix on first link 5 and second link 6, can with apex section 2 and the surperficial parallel and level of blade root section 3, prevent that the whole surface of fan blade 1 is unsmooth, influence the aesthetic property, and prevent to cause the airflow pressure on the surface of fan blade 1 different to influence the performance of fan blade 1.

In some embodiments, the outer contour surface of the attachment 4 matches the outer contour surface of the root section 3 and the outer contour surface of the tip section 2. Specifically, the surface shape of the first connecting member 9 facing the first connecting end 5 and the second connecting end 6 is the same as the surface shape of the first connecting end 5 and the second connecting end 6 connected correspondingly. The arrangement is that the first connecting piece 9 can be effectively attached to the same side surface of the first connecting end 5 and the second connecting end 6 before being heated and softened, and after the first connecting piece 9 is heated and softened, seamless bonding can be favorably realized between the first connecting piece 9 and the first connecting end 5 and the second connecting end 6, and the influence on the pneumatic performance of the whole machine is reduced. Similarly, the surface shapes of the second connecting piece 10 facing the first connecting end 5 and the second connecting end 6 are the same as the surface shapes of the first connecting end 5 and the second connecting end 6 which are correspondingly connected, so that the second connecting piece 10 can be effectively attached to the other side surfaces of the first connecting end 5 and the second connecting end 6 before being heated and softened, and after the second connecting piece 10 is heated and softened, seamless bonding between the second connecting piece 10 and the first connecting end 5 and the second connecting end 6 is facilitated, and the influence on the aerodynamic performance of the whole machine is reduced.

In some embodiments, the first connector 9 may be cut and laminated according to the shape of the first concave space 7, and the second connector 10 may be cut and laminated according to the shape of the second concave space 8, thereby transporting the first connector 9 and the second connector 10 to the wind farm.

Fig. 4 is a schematic connection diagram of a tip section 2, a root section 3 and a connector 4 of an embodiment of a fan blade 1 provided by the present application. Referring to fig. 3 and 4, in some embodiments, the tip section 2 includes a first end 15 and a second end 16 disposed perpendicular to the length direction. The first connecting element 9 and the second connecting element 10 are joined to form a first joint 17 and a second joint 18. A first seam 17 is located at the first end 15 and a second seam 18 is located at the second end 16. The blade tip section 2 and the blade root section 3 are in flat column shapes, and the corresponding first connecting end 5 and the second connecting end 6 are in flat column shapes, so that after the first connecting end 5 and the second connecting end 6 are wrapped by the first connecting piece 9 and the second connecting piece 10 together, a first seam 17 and a second seam 18 are correspondingly formed at the first end 15 and the second end 16 of the blade tip section 2 respectively, the inosculating effect of the first connecting piece 9 and the second connecting piece 10 is good, and the processing operation of the first connecting piece 9 and the second connecting piece 10 is simplified.

In some embodiments, the first connection end 5 and/or the second connection end 6 are made of a thermoset material. The thermosetting material has high melting temperature and high strength, is not easy to deform, and cannot cause the deformation of the first connecting end 5 and the second connecting end 6 when the connecting piece 4 is heated and pressurized, so that the integral performance of the fan blade 1 cannot be influenced. In this embodiment, the blade root section 3 and the blade tip section 2 are both formed by pressing a thermosetting material.

In the process of connecting the blade tip section 2 and the blade root section 3, the first connecting end 5 is aligned with the second connecting end 6 to prevent the connection reliability from being reduced due to deviation in the subsequent connecting process of the blade tip section 2 and the blade root section 3. Further, the connecting piece 4 made of thermoplastic material covers the surfaces of the first connecting end 5 and the second connecting end 6 in an all-directional 360-degree mode, the connecting piece 4 is further heated, the connecting piece 4 can be softened after being heated, then the connecting piece 4 is pressed to be fixedly bonded with the first connecting end 5 and the second connecting end 6, and finally the blade tip section 2 is connected with the blade root section 3. So set up, make the quality of the junction of tip section 2 and blade root section 3 light, connect more reliably to it is less to carry the load influence to the whole machine, and simple structure, the factory production and the wind field operation of being convenient for.

In some embodiments, the first connecting end 5 and the second connecting end 6 may be positioned and aligned by means of a positioning tool.

In some embodiments, the connecting member 4 may be heated and pressurized by a heating and pressurizing device. In some embodiments, the heating and pressurizing device comprises a heating wire. After the heating wire is electrified, the connecting piece 4 is heated in a heat radiation mode. In some embodiments, the heating and pressing device includes a pressing machine, and the connecting member 4 is pressed by the pressing machine, so that the connecting member 4 is fixedly bonded to the first connecting end 5 and the second connecting end 6, and the blade tip section 2 is connected to the blade root section 3. This presser pressurizes 4 full surface contact of connecting piece, makes 4 atress of connecting piece even, and pressurization is effectual, and avoids connecting piece 4's the surface phenomenon of unevenness to appear, and influences fan blade 1's whole aesthetic property.

In some embodiments, after heating and pressing the connecting member 4, after waiting for the cooling and solidification of the connecting member 4, the hardness of the connecting member 4 is increased, the strength of the connecting member 4 is increased, the connecting member 4 is prevented from being damaged by touch before solidification, and the connecting member 4 is ensured to be sufficiently combined with the first connecting end 5 and the second connecting end 6. The connecting member 4 may be cured at room temperature, but is not limited thereto.

In some embodiments, the temperature of the heater-connector 4 ranges from 100 ℃ to 300 ℃. Preferably, the temperature of the heating connection 4 is 200 ℃.

The technical solutions disclosed in the embodiments of the present application can complement each other without generating conflicts.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.