CN220101427U - Wind power blade and wind generating set - Google Patents

Abstract

The utility model relates to the technical field of wind power generation devices, and discloses a wind power blade and a wind power generator set. The wind power blade comprises a first shell, a second shell and a filling piece, wherein the end part of the front edge of the first shell is arranged at the end part of the front edge of the second shell; the filling piece is connected between the rear edge of the first shell and the rear edge of the second shell, and a cavity is formed in the middle of the filling piece; the filler is disposed along an axial direction of the first housing. The wind power blade with the structure is characterized in that a cavity is formed in the middle of a filling piece connected between the rear edge of the first shell and the rear edge of the second shell, so that the weight of the filling piece is reduced, and the weight of the wind power blade is further reduced.

Description

Wind power blade and wind generating set

Technical Field

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

Background

The wind power blade is a core component for converting natural wind energy into wind power generation set electric energy in the wind power generation set, and is also a main basis for measuring the design and technical level of the wind power generation set. At present, the pitch circle of the wind power blade with the blunt tail edge is bigger and bigger, and the cavity between the windward side and the leeward side of the wind power blade is bigger and bigger, so that the cavity in the rear edge area of the wind power blade is bigger and bigger, and the stability of the rear edge area of the wind power blade is poor, and the rear edge area is easy to damage. The prior art has a supporting effect on the trailing edge of a wind power blade by filling a cushion block in the trailing edge area. However, the cavity in the trailing edge area is large, so that the size of the trailing edge cushion block is increased, the existing trailing edge cushion block is of a solid structure, the cushion block penetrates through the axial direction of the wind power blade, and the weight of the trailing edge cushion block is heavy, so that the weight of the wind power blade is heavy.

Disclosure of Invention

In view of the above, the utility model provides a wind power blade and a wind generating set, which are used for solving the problem that the existing blunt trailing edge wind power blade is heavy.

In a first aspect, the present utility model provides a wind power blade comprising a first shell, a second shell and a filler, wherein an end of a leading edge of the first shell is mounted at an end of a leading edge of the second shell; the filling piece is connected between the rear edge of the first shell and the rear edge of the second shell, and a cavity is formed in the middle of the filling piece; the filler is disposed along an axial direction of the first housing.

The beneficial effects are that: the wind power blade with the structure is characterized in that a filling piece connected between the rear edge of the first shell and the rear edge of the second shell is made of a composite material with lighter weight, and the filling piece is light in weight; and the middle part of the filling piece is provided with a cavity so as to reduce the weight of the filling piece and further reduce the weight of the wind power blade.

In an alternative embodiment, along the chord section direction of the wind power blade, the length of the filling piece is L1, the width of the filling piece is W1, the length of the cavity is L2, and the width of the cavity is W2,0.333L1 is less than or equal to L2 and less than or equal to 0.667L1; 0.333W1W 2 is less than or equal to 0.667W1.

The beneficial effects are that: the size of the cavity is proper, so that the strength of the filling piece can be ensured, and the size of the cavity can be ensured to reduce the weight of the filling piece.

In an alternative embodiment, the packing member is provided in plurality, and the plurality of packing members are disposed at intervals along the axial direction of the first housing.

The beneficial effects are that: the plurality of filling pieces are paved along the axial direction of the wind power blade at intervals, and compared with the filling pieces which are paved along the axial direction of the wind power blade continuously, the overall weight of the filling pieces can be further reduced, so that the total weight of the wind power blade is further reduced, meanwhile, the cost of the filling pieces can be reduced, and the total manufacturing cost of the wind power blade is reduced. In addition, as the adhesive layer between the filling piece and the first shell is thicker, the filling piece is paved at intervals, so that the weight of the structural adhesive can be reduced, and the total weight of the wind power blade is reduced; in addition, the structural adhesive layers are arranged at intervals, so that the consumption of the structural adhesive can be reduced, the raw material cost of the wind power blade is reduced, and the total cost of manufacturing the wind power blade is further reduced.

In an alternative embodiment, each filler has a length L3 along the axial direction of the first housing, and the adjacent fillers have a spacing d,0.5 m.ltoreq.L3.ltoreq.1 m,0.06 m.ltoreq.d.ltoreq.1 m.

The beneficial effects are that: the length of the filling piece along the axial direction of the first shell is moderate, the axial interval between adjacent filling pieces is moderate, and the filling pieces are ensured to have enough strength to support the rear edge of the wind power blade so as to ensure the stability of the structure of the rear edge area; meanwhile, the consumption of filling pieces and structural adhesive can be reduced, and the manufacturing cost of the wind power blade is reduced.

In an alternative embodiment, the spacing between adjacent fillers decreases gradually from the root to the tip of the wind blade.

The beneficial effects are that: the wind power blade of this structure is big at the axial clearance of the filler of blade root region, and is little at the axial clearance of blade tip region to rationally set up the filler according to wind power blade self intensity distribution, guarantee wind power blade bulk strength and reduce the material cost of filler and structural adhesive simultaneously.

In an alternative embodiment, the filling member comprises a reinforcing member and a wrapping member, the cavity is arranged on the reinforcing member, and the wrapping member wraps the reinforcing member; the reinforcing piece and the wrapping piece are made of composite materials.

The beneficial effects are that: the wrapping member wraps the reinforcing member for ensuring the integrity and strength of the reinforcing member.

In an alternative embodiment, the material of the reinforcement comprises one or more of PVC foam, PET foam, HPE foam or PMI foam.

The beneficial effects are that: the foam is light in weight and can absorb impact load, the foam is supported at the rear edge of the wind power blade, the blade quality is reduced while the stability of the blade can be ensured, the wind catching area of the discharge blade is increased while the rigidity is met, and the anti-load capacity of the whole wind power blade is improved. The wrapping piece wraps the foam to enable the foam to restrain the foam and prevent the foam from being deformed under force.

In an alternative embodiment, the wrapper comprises a fibrous cloth.

The beneficial effects are that: the fiber cloth has high strength, good durability, good resistance to various chemicals, good acid and alkali resistance, mildew resistance or worm damage resistance and long service life, so that the strength and the service life of the wind power blade are ensured.

In an alternative embodiment, the device further comprises a web disposed between the first housing and the second housing.

In a second aspect, the utility model also provides a wind generating set, comprising any one of the wind power blades.

The beneficial effects are that: according to the wind turbine generator system with the structure, the wind turbine blade filling piece is made of the composite material with lighter weight, and the cavity is formed in the middle of the filling piece, so that the weight of the filling piece is reduced, and the weight of the wind turbine blade is further reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a chord section of a wind power blade according to an embodiment of the present utility model;

FIG. 2 is a spanwise cross-sectional view of a wind turbine blade in accordance with an embodiment of the present utility model.

Reference numerals illustrate:

1. a first housing; 2. a second housing; 3. a filler; 301. a cavity; 302. a reinforcement; 303. a wrapper; 4. a web.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Wind energy is the most commercially valuable energy source in the world clean energy utilization, and is an important member in the future renewable energy source field. Wind power generation sets are important devices for converting wind energy into electric energy, and wind power blades are important components of wind power generation sets. In order to meet the requirements of high-efficiency power generation under complex working conditions, the wind power blade is required to have the advantages of exterior design, light density, high strength and strong toughness, and the mechanical property requirements except the exterior design are directly related to the structure and the materials of the wind power blade. Wind-powered electricity generation blade structure includes girder system, upper and lower covering, blade root enhancement layer etc.: the girder system comprises girders and webs 4, the girders are responsible for main bearing and provide rigidity, namely bending resistance and torsion resistance, to the blades. The web 4 is responsible for supporting the cross-section structure and is bonded on the main girder after being prefabricated; the upper and lower skins are bonded with the girder structure through the front and rear edges to form the blade; the blade root reinforcing layer transmits the load on the main beam to the host machine.

The current blunt trailing edge wind power blade has a supporting function on the trailing edge of the wind power blade by filling cushion blocks in the trailing edge area. However, the cavity 301 in the trailing edge area is large, so that the volume of the trailing edge cushion block is increased, the existing trailing edge cushion block is of a solid structure, the cushion block penetrates through the axial direction of the wind power blade, the weight of the trailing edge cushion block is heavy, the weight of the wind power blade is increased, and the difficulty in reducing the weight of the wind power blade is increased.

An embodiment of the present utility model is described below with reference to fig. 1 to 2.

According to an embodiment of the present utility model, in one aspect, there is provided a wind power blade including a first casing 1, a second casing 2, and a filler 3, wherein an end of a leading edge of the first casing 1 is mounted at an end of a leading edge of the second casing 2; the filling piece 3 is connected between the rear edge of the first shell 1 and the rear edge of the second shell 2, and a cavity 301 is formed in the middle of the filling piece 3; the packing 3 is arranged in the axial direction of the first casing 1.

The wind power blade with the structure is characterized in that a cavity 301 is formed in the middle of a filling piece 3 connected between the rear edge of the first shell 1 and the rear edge of the second shell 2, so that the weight of the filling piece 3 is reduced, and the weight of the wind power blade is further reduced.

As shown in fig. 1, in one embodiment, along the chord section direction of the wind turbine blade, the length of the filler 3 (the length in the left-right direction of the filler 3 in fig. 1) is L1, the width of the filler 3 (the length in the up-down direction of the filler 3 in fig. 1) is W1, the length of the cavity 301 is L2, the width of the cavity 301 is W2,0.333L1 is L2 is 0.667L1; 0.333W1W 2 is less than or equal to 0.667W1, and the size of the cavity 301 is proper, so that the strength of the filling member 3 can be ensured, and the size of the cavity 301 can be ensured to reduce the weight of the filling member 3.

The size and shape of the packing 3 are determined according to the size and shape of the space surrounded by the rear edges of the first and second cases 1 and 2.

When the wind power blade is manufactured, the first shell 1 and the second shell 2 are manufactured and molded firstly, the filling piece 3 is placed on the second shell 2 and poured together with the second shell 2, the second shell 2 and the first shell 1 are assembled, and the filling piece 3 is adhered to the first shell 1 through structural adhesive. In order to prevent the filler 3 from being hard-connected with the first housing 1, a gap of about 6mm may be left between the first housing 1 and the filler 3 to fill the structural adhesive through the gap and form a structural adhesive layer with a certain thickness, so that the filler 3 is prevented from being hard-connected with the first housing 1, and the wind power blade and the wind resistance, the earthquake resistance and the impact resistance are improved.

In the cost structure of the wind power blade, the raw material cost of the wind power blade accounts for 75% of the total production cost, and the raw material cost of the wind power blade accounts for a relatively large amount of reinforcing fibers, resin matrixes, core materials and structural adhesive.

As shown in fig. 2, in one embodiment, the packing 3 is provided in plural, and the plural packing 3 are disposed at intervals in the axial direction of the first casing 1. The plurality of filling pieces 3 are paved at intervals along the axial direction of the wind power blade, and compared with the filling pieces which are paved continuously along the axial direction of the wind power blade, the overall weight of the filling pieces 3 can be further reduced, so that the total weight of the wind power blade is further reduced, meanwhile, the cost of the filling pieces 3 can be reduced, and the total manufacturing cost of the wind power blade is reduced. In addition, as the adhesive layer between the filling piece 3 and the first shell 1 is thicker, the filling piece 3 is paved at intervals, so that the weight of the structural adhesive can be reduced, and the total weight of the wind power blade is reduced; in addition, the structural adhesive layers are arranged at intervals, so that the consumption of the structural adhesive can be reduced, the raw material cost of the wind power blade is reduced, and the total cost of manufacturing the wind power blade is further reduced.

In other embodiments, the filler 3 may also be a unitary structure, which is arranged continuously in the axial direction of the wind blade, as long as a cavity 301 is provided inside thereof to reduce the weight of the filler 3.

As shown in FIG. 2, in one embodiment, the length of each filling piece 3 along the axial direction of the first shell 1 is L3, the distance between every two adjacent filling pieces 3 is d, L3 is more than or equal to 0.5m and less than or equal to 1m, d is more than or equal to 0.06m and less than or equal to 1m, the length of each filling piece 3 along the axial direction of the first shell 1 is moderate, the axial interval between every two adjacent filling pieces 3 is moderate, and the filling pieces are ensured to have enough strength to support the rear edge of the wind power blade so as to ensure the structural stability of the rear edge area; meanwhile, the consumption of the filling piece 3 and the structural adhesive can be reduced, and the manufacturing cost of the wind power blade is reduced.

Specifically, in one embodiment, the spacing between adjacent fillers 3 is progressively reduced from the root to the tip of the wind blade. Because the intensity of wind-powered electricity generation blade root region is high, and apex region intensity is low, the axial clearance of the packing piece 3 of wind-powered electricity generation blade of this structure in blade root region is big, and the axial clearance in apex region is little to rationally set up packing piece 3 according to wind-powered electricity generation blade self intensity distribution, guarantee wind-powered electricity generation blade bulk strength and reduce packing piece 3 and structural adhesive's material cost simultaneously.

For example, in one embodiment, the axial spacing of the adjacent fillers 3 in the blade root region is 200mm to 300mm and the axial spacing of the adjacent fillers 3 in the blade tip region is 60mm to 90mm.

As shown in fig. 1, in one embodiment, the filling member 3 includes a reinforcing member 302 and a wrapping member 303, the cavity 301 is disposed on the reinforcing member 302, the wrapping member 303 is wrapped outside the reinforcing member 302, the reinforcing member 302 and the wrapping member 303 are made of composite materials, and the wrapping member 303 is wrapped outside the reinforcing member 302 to ensure the integrity and strength of the reinforcing member 302; the reinforcing member 302 and the wrapping member 303 are made of composite materials, and the composite materials are light in weight so as to reduce the weight of the wind power blade.

Optionally, in one embodiment, the material of the stiffener 302 includes one or more of PVC foam, PET foam, HPE foam, or PMI foam. The foam is light in weight and can absorb impact load, the foam is supported at the rear edge of the wind power blade, the blade quality is reduced while the stability of the blade can be ensured, the wind catching area of the discharge blade is increased while the rigidity is met, and the anti-load capacity of the whole wind power blade is improved. The wrapping 303 wraps the foam to restrain the foam and prevent the foam from being deformed by force.

The wrapping 303 comprises a fibrous cloth wrapped around the foam. The fiber cloth has high strength, good durability, good resistance to various chemicals, good acid and alkali resistance, mildew resistance or worm damage resistance and long service life, so that the strength and the service life of the wind power blade are ensured.

As shown in fig. 1, the wind power blade further comprises a web 4, wherein the web 4 is arranged between the first shell 1 and the second shell 2.

The manufacturing process of the wind power blade comprises the following steps:

preparing a first housing 1 and a second housing 2;

forming a reinforcing piece 302, and wrapping fiber cloth outside the reinforcing piece 302;

placing the filling member 3 on the second housing 2, and pouring the second housing 2 together with the filling member 3, so that the filling member 3 is fixed on the second housing 2;

the first housing 1 and the second housing 2 are clamped, and the filling member 3 is adhered to the first housing 1 through structural adhesive.

Alternatively, the first housing 1 is an upper housing, and the second housing 2 is a lower housing.

According to an embodiment of the utility model, on the other hand, a wind generating set is also provided, and the wind generating set comprises the wind power blade.

According to the wind turbine generator system with the structure, the wind turbine blade filling piece 3 is made of a composite material with lighter weight, and the cavity 301 is formed in the middle of the filling piece 3, so that the weight of the filling piece 3 is reduced, and the wind turbine blade weight is further reduced.

The wind generating set further comprises a tower and a cabin, the wind power blades are arranged on the cabin, and the cabin is arranged on the tower.

Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.

Claims (9)

1. A wind power blade, comprising:

a first housing (1);

a second housing (2), wherein the end of the front edge of the first housing (1) is mounted at the end of the front edge of the second housing (2);

the filling piece (3) is connected between the rear edge of the first shell (1) and the rear edge of the second shell (2), and a cavity (301) is formed in the middle of the filling piece (3); the filler (3) is arranged in the axial direction of the first housing (1).

2. Wind power blade according to claim 1, characterized in that the length of the filler (3) in the chord section direction of the wind power blade is L1, the width of the filler (3) is W1, the length of the cavity (301) is L2, the width of the cavity (301) is W2, 0.333L1L 2 0.667L1; 0.333W1W 2 is less than or equal to 0.667W1.

3. Wind power blade according to claim 1 or 2, characterized in that the filler piece (3) is provided in a plurality, a plurality of the filler pieces (3) being arranged at intervals in the axial direction of the first housing (1).

4. A wind power blade according to claim 3, wherein each filler piece (3) has a length L3 along the axial direction of the first housing (1), and the distance between adjacent filler pieces (3) is d, L3 is 0.5 m.ltoreq.l3.ltoreq.1 m, and d is 0.06 m.ltoreq.1 m.

5. Wind blade according to claim 4, characterized in that the spacing between adjacent fillers (3) decreases gradually from the root to the tip of the wind blade.

6. Wind blade according to claim 1 or 2, wherein the filler (3) comprises a reinforcement (302) and a wrapper (303), the cavity (301) being provided on the reinforcement (302), the wrapper (303) being wrapped outside the reinforcement (302); the reinforcing piece (302) and the wrapping piece (303) are made of composite materials.

7. Wind blade according to claim 6, characterized in that the wrap (303) comprises a fibre cloth.

8. Wind blade according to claim 1 or 2, further comprising a web (4), said web (4) being arranged between the first shell (1) and the second shell (2).

9. A wind power generator set comprising a wind power blade according to any one of claims 1 to 8.