CN215633503U - Blade and wind generating set - Google Patents

Abstract

The utility model relates to a blade and a wind generating set. The blade includes: the blade body is provided with a blade root part, a main body part and a blade tip part which are distributed in sequence in the length direction of the blade body; the protective assembly is arranged on the front edge of the blade body and comprises a first protective assembly and a second protective assembly which are continuously arranged in the length direction, the first protective assembly is arranged at the tip part of the blade, the second protective assembly is at least arranged on the main body part, and the corrosion resistance of the first protective assembly is greater than that of the second protective assembly. The blade and the wind generating set provided by the embodiment of the utility model can reduce the possibility that the front edge of the blade is corroded or polluted to cause the change of the surface appearance.

Description

Blade and wind generating set

Technical Field

The utility model relates to the technical field of wind power, in particular to a blade and a wind generating set.

Background

The wind generating set can convert wind energy in nature into electric energy which can be utilized, and the application is very wide. When the wind generating set normally works, the rotating speed of the blades per se is high, so that the blades can be eroded by rainwater, sand blown by wind or insects in the long-term operation process of the natural environment. However, after the leading edge area of the blade is corroded, the surface quality of the leading edge area of the blade is reduced, the surface appearance is changed, the aerodynamic performance is reduced, the output power is reduced, and the power generation loss is caused.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a blade and a wind generating set, which can reduce the possibility that the front edge of the blade is corroded or polluted to cause the change of the surface appearance.

In one aspect, according to an embodiment of the present invention, a blade for a wind turbine generator system is provided, including:

the blade body is provided with a blade root part, a main body part and a blade tip part which are distributed in sequence in the length direction of the blade body; the protective assembly is arranged on the front edge of the blade body and comprises a first protective assembly and a second protective assembly which are continuously arranged in the length direction, the first protective assembly is arranged at the tip part of the blade, the second protective assembly is at least arranged on the main body part, and the corrosion resistance of the first protective assembly is greater than that of the second protective assembly.

According to an embodiment of the utility model, the thickness of the first protective component tapers in a direction from the leading edge of the blade body to the trailing edge of the blade body.

According to one embodiment of the utility model, the blade body has a windward side and a leeward side, the first protection component comprises a first edge and a second edge, the second protection component comprises a third edge and a fourth edge, the first edge and the third edge are located at the windward side, the second edge and the fourth edge are located at the leeward side, and the first edge exceeds the third edge in the direction from the leading edge of the blade body to the trailing edge of the blade body; and/or the second edge exceeds the fourth edge.

According to one embodiment of the utility model, the extension from the first edge to the second edge is gradually smaller in the direction away from the second shield member, and the extension from the third edge to the fourth edge is constant in the length direction.

According to one embodiment of the utility model, the protective assembly further comprises a substrate layer, the surface of the first protective assembly facing the blade body is provided with the substrate layer, and the substrate layer is connected with the blade body in an adhesion mode.

According to one embodiment of the present invention, the first shield member and the second shield member are connected to each other in an overlapping manner along the length direction.

According to one embodiment of the utility model, the overlap of one end of the first shield component and one end of the second shield component is welded or sewn.

According to one embodiment of the utility model, the blade further comprises a covering layer, the covering layer covers the blade body and the protection component, and the outer surface of the covering layer, which faces away from the blade body, is a smooth curved surface; alternatively, the first and second electrodes may be,

the length of the first protection component is 1/10 which is equal to or less than the total length of the blade body along the length direction, and the length of the second protection component is 2/5 which is equal to or more than the total length of the blade body and 4/5 which is equal to or less than the total length of the blade body along the length direction.

According to one embodiment of the utility model, the first protection component is any one of a hydrogenated nitrile rubber protection component, an ethylene propylene rubber protection component and a special polyurethane rubber protection component; the second protection component is any one of a crosslinked polyethylene protection component, an ultrahigh molecular weight polyethylene protection component or a polyvinylidene fluoride protection component.

The blade provided by the embodiment of the utility model can be connected with a hub when being used for a wind generating set. When the blades rotate under the action of wind energy, kinetic energy can be transmitted through the hub, and finally the rotor and the stator of the generator are driven to rotate relatively, so that the conversion from the wind energy to the electric energy is realized. The protection assembly comprises a first protection assembly and a second protection assembly. The first protection component and the second protection component are arranged on the outer side of the blade body. First protection component sets up in the leaf point portion for form the protection to the leaf point portion, reduce the leaf point portion and receive material erosion such as rainwater, sand blown by the wind or salt fog and lead to the possibility that surface appearance changes. The second protection component is at least arranged on the main body part and used for protecting the main body part and reducing the possibility that the main body part is polluted by dust, insects and other substances to cause the change of the surface appearance. The corrosion resistance of first protective assembly is greater than the corrosion resistance of second protective assembly to make first protective assembly can improve the anti erosion capacity of leaf point portion, and the second protective assembly can improve the anti dirty ability of main part, thereby can divide the regional protection to the blade body through first protective assembly and second protective assembly, form effective protection to the blade body in coordination each other. Therefore, the surface quality of the blade can be kept in a good state for a long time, and the surface appearance is not easy to change, so that the pneumatic performance of the blade is stable, the output power is stable, and the condition of generating capacity loss is not easy to occur.

In another aspect, a wind park according to an embodiment of the utility model is provided, comprising a blade as in any of the embodiments described above.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic view of the overall structure of a wind turbine generator system according to an embodiment of the present invention;

FIG. 2 is a schematic view of the overall structure of a blade body according to an embodiment of the utility model;

FIG. 3 is a schematic view of the overall structure of a blade according to an embodiment of the present invention;

FIG. 4 is a schematic view of a connection structure of a first shield assembly and a second shield assembly according to an embodiment of the present invention;

FIG. 5 is a partial structural schematic view of a blade according to an embodiment of the present invention;

FIG. 6 is a partial schematic structural view of a blade according to another embodiment of the present invention;

FIG. 7 is a partial cross-sectional structural schematic view of a blade of an embodiment of the present invention;

FIG. 8 is a schematic view of a connection of a first shield assembly and a substrate layer according to one embodiment of the utility model;

FIG. 9 is a partial schematic structural view of a bucket according to another embodiment of the present invention;

FIG. 10 is an enlarged view at A of FIG. 9;

fig. 11 is a partial structural view of a blade according to still another embodiment of the present invention.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Description of the labeling:

1. a tower;

2. a nacelle;

3. a generator;

4. an impeller; 4a, a hub; 4b, a blade;

40. a blade body; 40a, leading edge; 40b, trailing edge; 40c, windward side; 40d, a leeward surface; 41. the root of the leaf; 42. a main body portion; 43. a tip portion;

50. a guard assembly;

51. a first guard assembly; 511. a first edge; 512. a second edge;

52. a second guard assembly; 521. a third edge; 522. a fourth edge;

53. a substrate layer;

60. a cover layer;

x, the longitudinal direction.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The following description is given with the directional terms shown in the drawings and is not intended to limit the specific structure of the blade and the wind turbine generator system of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

For a better understanding of the present invention, embodiments according to the present invention are described below with reference to fig. 1 to 11.

Referring to fig. 1, an embodiment of the present invention provides a wind turbine generator system, which includes a tower 1, a nacelle 2, a generator 3, a transmission system (not shown), and an impeller 4. The tower 1 is connected to a wind turbine foundation. The nacelle 2 is arranged on top of the tower 1. The nacelle 2 can be connected with the tower 1. The impeller 4 includes a hub 4a and a plurality of blades 4b connected to the hub 4 a. The generator 3 is provided to the nacelle 2. In some examples, the generator 3 may be located outside the nacelle 2. The generator 3 includes a rotor and a stator. The rotor may be connected to the hub 4a by a transmission system. The stator may be connected to the nacelle 2 via a transmission system. When wind acts on the blade 4b, the blade 4b drives the hub 4a to rotate. The hub 4a drives the rotor of the generator 3 to rotate relative to the stator through the transmission system, so that the power generation requirement of the wind generating set is met.

In the long-term operation process of the blade 4b of the embodiment of the utility model, the front edge of the blade 4b is easy to be corroded and polluted, and the aerodynamic performance of the blade 4b is influenced. Erosion factors include, but are not limited to, rain erosion, sand erosion, or salt spray erosion. Contamination factors include, but are not limited to, dust-adhering contamination or insect-adhering contamination. The leading edge of the blade 4b was analyzed for erosion and contamination factors, and it was found that erosion occurred more intensively at the tip portion and the degree of erosion decreased rapidly from the tip portion toward the root portion. The influence of pollution on the power generation of the wind generating set depends on the area of a pollution front edge area, and the larger the pollution area is, the larger the power generation loss is caused.

In view of the above technical problems, the present invention provides a blade 4b, which can be manufactured as a separate component, and can also be used in the wind turbine generator system provided in the above embodiments and be a component of the wind turbine generator system.

Referring to fig. 2 and 3, a blade 4b according to an embodiment of the present invention includes a blade body 40 and a protective assembly 50. The blade body 40 itself has a predetermined length. The blade body 40 includes a root portion 41, a main body portion 42, and a tip portion 43. The blade root portion 41, the main body portion 42 and the tip portion 43 are arranged in succession along the longitudinal direction X of the blade body 40 itself. The main body portion 42 of the blade body 40 is a region between the root portion 41 and the tip portion 43, and is large in area. The blade root 41 of the blade body 40 is intended to be connected to the hub 4 a. The blade body 40 includes opposite leading and trailing edges 40a, 40 b. The guard assembly 50 is disposed at the leading edge 40a of the blade body 40. The shield assembly 50 includes a first shield assembly 51 and a second shield assembly 52. The first shield member 51 and the second shield member 52 are continuously arranged along the length direction X. The first guard assembly 51 is disposed at the tip portion 43. The second shielding member 52 is disposed at least on the main body 42. The corrosion resistance of the first shield member 51 is greater than the corrosion resistance of the second shield member 52. The shield assembly 50 may form a shield to the leading edge 40a of the blade body 40.

The blade 4b of the embodiment of the utility model can be connected with the hub 4a when being used for a wind generating set. When the blades 4b rotate under the action of wind energy, kinetic energy can be transmitted through the hub 4a, and finally the rotor and the stator of the generator 3 are driven to rotate relatively, so that the conversion from the wind energy to the electric energy is realized. The shield assembly 50 of the present embodiment includes a first shield assembly 51 and a second shield assembly 52. The first and second shield members 51 and 52 are disposed outside the blade body 40. The first protection assembly 51 is arranged on the blade tip part 43 and used for protecting the blade tip part 43 and reducing the possibility that the blade tip part 43 is corroded by substances such as rainwater, sand wind or salt mist to cause the change of the surface appearance. The second protection component 52 is at least arranged on the main body 42 and is used for protecting the main body 42 and reducing the possibility that the main body 42 is polluted by dust, insects and other substances to change the surface appearance. The corrosion resistance of the first protection component 51 is greater than that of the second protection component 52, so that the first protection component 51 can improve the erosion resistance of the blade tip part 43, and the second protection component 52 can improve the dirt resistance of the main body part 42, so that the blade body 40 can be protected in a sub-region mode through the first protection component 51 and the second protection component 52, and the blade body 40 is effectively protected in cooperation with each other. Therefore, the surface quality of the blade 4b can be kept in a good state for a long time, and the surface appearance is not easy to change, so that the pneumatic performance of the blade 4b is stable, the output power is stable, and the condition of generating capacity loss is not easy to occur.

In some embodiments, the second guard assembly 52 may extend along the length direction X to the root portion 41, further increasing the guard area.

In some embodiments, as shown in fig. 3 and 4, the first and second shield members 51, 52 are flexible structures that can be optionally deformed to better conform to the outer surface of the blade body 40.

In some embodiments, referring to fig. 5, the thickness of the first guard assembly 51 is tapered in a direction from the leading edge 40a of the blade body 40 to the trailing edge 40b of the blade body 40, such that the thickness of the first guard assembly 51 is greatest in a middle region of the leading edge 40a and smallest in an edge region away from the leading edge 40 a. In this way, the edge of the first protection component 51 and the blade body 40 can be smoothly connected, and the transition between the first protection component 51 and the blade body 40 is smooth, so that the possibility that the first protection component 51 adversely affects the aerodynamic performance of the blade 4b is reduced. The thickness of the second protection component 52 is uniform along the direction from the leading edge 40a of the blade body 40 to the trailing edge 40b of the blade body 40, that is, the thickness of the second protection component 52 does not change, and the thicknesses of all the regions are consistent. Thus, on the premise that the second protection component 52 does not affect the aerodynamic performance of the blade 4b, the second protection component 52 with uniform thickness is low in processing and manufacturing difficulty, and processing cost is reduced. Illustratively, the thickness of the middle region of the first protective component 51 is greater than the thickness of the second protective component 52, while the thickness of the edge region of the first protective component 51 is less than the thickness of the second protective component 52. For example, the first protective component 51 may have a maximum thickness in the middle region of 6 mm and a minimum thickness in the side edge regions of 0.5 mm. The thickness of the second guard assembly 52 may be 1 millimeter.

In some embodiments, referring to fig. 5 and 6, the blade body 40 has opposing windward and leeward sides 40c, 40 d. The first guard assembly 51 includes a first edge 511 and a second edge 512. The second guard assembly 52 includes a third edge 521 and a fourth edge 522. The first edge 511 of the first guard component 51 and the third edge 521 of the second guard component 52 are located on the windward side 40 c. The second edge 512 of the first guard assembly 51 and the fourth edge 522 of the second guard assembly 52 are located on the leeward side 40 d. Along the direction from the front edge 40a to the rear edge 40b, the first edge 511 of the first protection component 51 exceeds the third edge 521 of the second protection component 52, so that along the direction from the front edge 40a to the rear edge 40b, the first protection component 51 extends for a length greater than the length of the second protection component 52, which is beneficial to improving the erosion resistance of the joint of the first protection component 51 and the second protection component 52, and reducing the possibility that the joint of the first protection component 51 and the second protection component 52 is eroded to cause the first protection component 51 and the second protection component 52 to be separated from the windward side 40c of the blade body 40. Alternatively, the second edge 512 of the first protection component 51 exceeds the fourth edge 522 of the second protection component 52, so as to reduce the possibility that the joint of the first protection component 51 and the second protection component 52 is corroded to cause the first protection component 51 and the second protection component 52 to be separated from the leeward side 40d of the blade body 40. Illustratively, the first edge 511 of the first protective component 51 exceeds the third edge 521 of the second protective component 52, and the second edge 512 of the first protective component 51 exceeds the fourth edge 522 of the second protective component 52.

In some embodiments, the extension W of the first protection component 51 from the first edge 511 to the second edge 512 of the first protection component 51 in the direction away from the second protection component 52 is gradually smaller, that is, the extension W of the first protection component 51 is smaller closer to the tip of the blade tip 43, so that the first protection component 51 can be matched with the shape of the blade tip 43, and the possibility that the aerodynamic performance of the blade 4b is affected due to the mismatch of the shapes of the first protection component 51 and the blade tip 43 is reduced. It should be noted that the extension W may be a dimension measured in a direction perpendicular to the longitudinal direction X when the first shield member 51 is flattened. Along the length direction X, the extension W of the second guard assembly 52 from the third edge 521 to the fourth edge 522 is constant. Thus, the second protection component 52 has low difficulty in manufacturing without affecting the aerodynamic performance of the blade 4b on the premise that the second protection component 52 does not affect the aerodynamic performance of the blade. It should be noted that the extension W may be a dimension measured in a direction perpendicular to the length direction X when the second shield assembly 52 is flattened. Illustratively, the extension W of the first guard assembly 51 from its first edge 511 to its second edge 512 may gradually vary from 150 mm to 60 mm. The extension W of the second guard assembly 52 from its third edge 521 to its fourth edge 522 may be 120 mm.

In some embodiments, referring to fig. 7, the first shield member 51 and the second shield member 52 are overlapped with each other along the length direction X to form an overlapped region T. In this way, the first protection component 51 and the second protection component 52 are continuous in the length direction X, and no gap is formed between the first protection component 51 and the second protection component 52, so that the possibility that the first protection component 51 and the second protection component 52 are separated from the front edge 40a of the blade body 40 due to corrosion or pollution at the joint of the first protection component 51 and the second protection component 52 is reduced. Illustratively, the first protection component 51 overlaps the second protection component 52 on a side thereof away from the blade body 40, so as to reduce the possibility of the second protection component 52 being damaged due to erosion at the overlapping region T.

In some embodiments, the overlapping portion of one end of the first protection component 51 and one end of the second protection component 52 is welded or sewn, so as to effectively improve the connection strength of the first protection component 51 and the second protection component 52 and reduce the possibility that the first protection component 51 and the second protection component 52 are separated from each other.

In some embodiments, the first and second shield members 51 and 52, respectively, are adhesively attached to the blade body 40. For example, the first and second protection members 51 and 52 are respectively bonded to the blade body 40 using a two-component epoxy structural adhesive.

In some embodiments, referring to fig. 8, the guard assembly 50 further includes a backing layer 53. A backing layer 53 is provided on the surface of the first guard member 51 facing the blade body 40. The backing layer 53 is adhesively attached to the blade body 40. The backing layer 53 is used for improving the connection reliability of the first protective component 51 and the blade body 40, and reducing the possibility that the first protective component 51 and the blade body 40 are separated in long-term use. Illustratively, the substrate layer 53 may be a fiberglass layer.

In some alternative embodiments, referring to fig. 9 and 10, the overlap of the first and second guard assemblies 51 and 52 does not overlap the substrate layer 53. The substrate layer 53 is located on one side of the overlapping portion of the first shield member 51 and the second shield member 52 in the length direction X. In this way, the second protection component 52 is not supported by the substrate layer 53 at the overlapping position, so that a gap occurs between the second protection component 52 and the first protection component 51 at the overlapping position, and the possibility that the joint strength of the overlapping position of the first protection component 51 and the second protection component 52 is reduced due to the gap is reduced.

In some embodiments, the length of the first guard assembly 51 along the length direction X is less than or equal to 1/10 of the total length of the blade body 40. The length of the second shielding component 52 along the length direction X is greater than or equal to 2/5 of the total length of the blade body 40 and less than or equal to 4/5 of the total length of the blade body 40. In this way, the first shielding member 51 can effectively shield the tip portion 43, and the second shielding member 52 can effectively shield the main body portion 42. For example, the overall length of the blade body 40 may be 80 meters, wherein a region of 5 meters from the tip of the blade on the leading edge 40a may be provided with the first protective component 51, while an immediately adjacent region of 45 meters may be provided with the second protective component 52.

In some embodiments, referring to fig. 11, blade 4b further comprises a cover layer 60. The overlay 60 covers the blade body 40 and the protective assembly 50. The outer surface of the covering layer 60 facing away from the blade body 40 is a smooth curved surface, so that the possibility that the first protective component 51 and the second protective component 52 have adverse effects on the aerodynamic performance of the blade 4b is effectively further reduced, and meanwhile, the covering layer 60 can also play a role in protecting the blade body 40. Illustratively, the outer surface shape of the overlay 60 matches the outer surface shape of the blade body 40.

In some embodiments, the material of the first protective component 51 may be hydrogenated nitrile rubber, ethylene propylene rubber, or special polyurethane rubber, etc. The material of the second protective component 52 may be cross-linked polyethylene, ultra-high molecular weight polyethylene, polyvinylidene fluoride, or the like.

While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the utility model not be limited to the particular embodiments disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. A blade for a wind turbine, comprising:

the blade body is provided with a blade root part, a main body part and a blade tip part which are distributed in sequence in the length direction of the blade body;

the protection component, set up in the leading edge of blade body, the protection component include length direction sets up in succession first protection component and second protection component, first protection component set up in the lobe portion, the second protection component set up at least in the main part, wherein, first protection component's corrosion resistance is greater than the corrosion resistance of second protection component.

2. The blade of claim 1, wherein a thickness of said first protective component tapers in a direction from said leading edge of said blade body to a trailing edge of said blade body.

3. The blade of claim 1, wherein the blade body has a windward side and a leeward side, the first protective component comprising a first edge and a second edge, the second protective component comprising a third edge and a fourth edge, the first edge and the third edge being located on the windward side, the second edge and the fourth edge being located on the leeward side, the first edge exceeding the third edge in a direction from the leading edge of the blade body to the trailing edge of the blade body; and/or, the second edge exceeds the fourth edge.

4. The blade of claim 3 wherein an extension from said first edge to said second edge tapers in a direction away from said second shield assembly and an extension from said third edge to said fourth edge does not change in said length direction.

5. The blade of claim 1, wherein said shield assembly further comprises a backing layer, said backing layer being disposed on a surface of said first shield assembly facing said blade body, said backing layer being adhesively attached to said blade body.

6. The blade according to any one of claims 1 to 5, wherein said first and second shield components are lap joined to each other along said length direction.

7. The blade of claim 6 wherein the overlap of the one end of the first shield component and the one end of the second shield component is welded or stitched.

8. The blade according to any one of claims 1 to 5, wherein:

the blade also comprises a covering layer, the covering layer covers the blade body and the protection assembly, and the outer surface of the covering layer, which faces away from the blade body, is a smooth curved surface; alternatively, the first and second electrodes may be,

the length of the first protection component along the length direction is 1/10 which is equal to or less than the total length of the blade body, and the length of the second protection component along the length direction is 2/5 which is equal to or more than the total length of the blade body and 4/5 which is equal to or less than the total length of the blade body.

9. The blade according to claim 1, wherein the first protective component is any one of a hydrogenated nitrile rubber protective component, an ethylene propylene rubber protective component, a special polyurethane rubber protective component; the second protection component is any one of a crosslinked polyethylene protection component, an ultrahigh molecular weight polyethylene protection component or a polyvinylidene fluoride protection component.

10. A wind park according to any of claims 1 to 9, comprising a blade according to any of claims 1 to 9.

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