CN114635833A

CN114635833A - Prevent and remove icing-wind power paddle and aerogenerator

Info

Publication number: CN114635833A
Application number: CN202210264014.9A
Authority: CN
Inventors: 魏晓娜; 邱双; 秦冉; 宁玲玲; 刘延霞
Original assignee: Shandong Engineering Vocational and Technical University
Current assignee: Shandong Engineering Vocational and Technical University
Priority date: 2022-03-17
Filing date: 2022-03-17
Publication date: 2022-06-17

Abstract

The invention relates to an anti-icing and deicing wind power blade and a wind driven generator, which comprise a blade body, wherein a groove is formed in the windward outer curved surface of the blade body, a heat insulation layer, a heating layer and a deicing layer made of a shape memory material are sequentially arranged in the groove from inside to outside, a plurality of first heat transfer laminated structures are arranged in the deicing layer, and the first heat transfer laminated structures are arranged perpendicular to the outer curved surface.

Description

Anti-icing and deicing wind power blade and wind driven generator

Technical Field

The invention relates to the technical field of deicing of wind power blades, in particular to an anti-icing and deicing wind power blade and a wind driven generator.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The icing of the wind power blades directly influences the normal operation of wind power generation equipment and the operation safety of personnel. Because the wind power blade needs to have enough structural strength and guarantee the requirements of light weight and fluid appearance, the wind power blade is mainly prepared by adopting glass fiber and carbon fiber composite materials at present. Most of wind power blades in service do not have anti-icing and deicing capabilities, and icing on the surfaces of the blades under extreme conditions directly affects the wind power generation efficiency and seriously causes shutdown.

At present, the shape memory epoxy resin material arranged in an easily-frozen area of the wind power blade needs to be heated to deform so as to realize deicing of the wind power blade, but the inventor finds that the mode of deicing by means of deformation of the shape wing epoxy resin material has low heat utilization rate, high heat loss and poor deicing effect.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the anti-icing wind power blade which is high in heat utilization rate, small in heat loss and good in deicing effect.

In order to realize the purpose, the invention adopts the following technical scheme:

in a first aspect, the embodiment of the invention provides an anti-icing and deicing wind power blade, which comprises a blade body, wherein a groove is formed in the windward outer curved surface of the blade body, a heat insulation layer, a heating layer and a deicing layer made of a shape memory material are sequentially arranged in the groove from inside to outside, a plurality of first heat transfer sheet layer structures are doped in the deicing layer, and the first heat transfer sheet layer structures are arranged perpendicular to the outer curved surface.

Optionally, the deicing layer is made of an epoxy resin material with shape memory property.

Optionally, the heat insulation layer is made of resin-based glass fiber materials.

Optionally, the first heat transfer lamellar structure adopts a graphene oxide lamellar structure.

Optionally, the distribution density of the first heat transfer sheet structure is gradually increased along the span direction of the blade body.

Optionally, along the chord direction of the blade body, the distribution density of the first heat transfer sheet layer structures in the direction from the center of the blade body to the two sides is gradually reduced.

Optionally, the heating layer is a polyimide heating film.

Optionally, a heat insulating layer is laid on the groove surface of the groove, the end part of the deicing layer along the chord direction of the blade body is connected with one end of each of the elastic pieces, and the other end of each of the elastic pieces is connected with the heat insulating layer laid in the groove surface at the bottom of the groove perpendicular to the outer curved surface;

furthermore, the space between the end part of the deicing layer, the heat insulation layer and the heating layer along the chord direction and the heat insulation layer of the bottom groove surface is filled with heat conduction materials, and a plurality of second heat transfer sheet structures arranged in parallel with the outer curved surface are doped in the heat insulation layer.

Optionally, the second heat transfer lamellar structure adopts a graphene oxide lamellar structure.

In a second aspect, an embodiment of the present invention provides a wind power generator provided with the anti-icing wind power blade of the first aspect.

The beneficial effects of the invention are as follows:

1. the anti-icing and deicing wind power blade is provided with the first heat transfer laminated structure, so that heat of the heating layer can be transferred to the outside, the ice layer attached to the surface of the blade is heated to be heated and deiced, meanwhile, the heating layer heats the deicing layer, the deicing layer can be deformed to perform mechanical deicing, the combination of mechanical deicing and heating deicing is realized, the deicing effect is good, the heat utilization rate is improved, and the heat loss is reduced.

2. The anti-icing wind power blade is provided with the heat insulation layer, so that the heat transferred from the heating layer to the interior of the wind power blade is reduced, the heat damage of the heat of the anti-icing heating layer to the interior of the wind power blade is effectively reduced, and the anti-icing efficiency is improved.

3. According to the anti-icing and anti-icing wind power blade, the distribution density of the first heat transfer laminated structures is gradually increased along the span direction of the blade body, the distribution density of the first heat transfer laminated structures in the direction from the center of the blade body to two sides is gradually reduced along the chord direction of the blade body, the first heat transfer laminated structures are arranged according to the icing thicknesses of different positions of the blade body, the anti-icing and anti-icing effects are ensured, the arrangement number of the first heat transfer laminated structures is reduced to the greatest extent, and the processing cost of the wind power blade is reduced.

4. The anti-icing and deicing wind power blade is provided with the spring, and can apply elasticity to the deicing layer to prevent the deicing layer from generating large deformation to influence the wing-shaped curve of the blade body.

5. The anti-icing and deicing wind power blade is provided with the heat conducting material, the heat conducting layer is internally provided with the second heat conducting laminated structure parallel to the outer curved surface, the heat transferred to the heat conducting layer from the heating layer can be transferred to the heat conducting material through the second heat conducting laminated structure, and then is transferred to the deicing layer through the heat conducting material, so that the utilization rate of the heat is improved, and the heat loss is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;

FIG. 2 is a schematic view showing the distribution of an ice-removing layer, a heating layer and a thermal insulation layer in example 1 of the present invention;

the blade comprises a blade body, a spring, a first heat transfer sheet layer structure, a heat conduction material and a heat insulation layer, wherein the blade body comprises a deicing layer 1, a heating layer 2, a heat insulation layer 3, a blade body 4, the spring 5, the first heat transfer sheet layer structure 6, the heat conduction material 7 and the heat insulation layer 8.

Detailed Description

Example 1

The embodiment provides an anti-icing and deicing wind power blade, which comprises a blade body 4, wherein the blade body 4 is of an existing wind power blade structure and is provided with a windward side and a leeward side, the windward side is an outward convex outer curved surface, and an anti-icing and deicing assembly is arranged on the windward side due to the fact that the windward side is easy to freeze.

In this embodiment, set up the recess at the outer curved surface that the paddle body is met with wind, prevent that the deicing subassembly embedding sets up in the recess, prevents that the lateral surface of deicing subassembly and the lateral surface of the other part of paddle body are the same level mutually.

The anti-icing and deicing component comprises a heat insulation layer 3, a heating layer 2 and an deicing layer 1 which are sequentially arranged inside the groove from inside to outside.

The deicing layer 1 is made of shape memory materials, and can generate micro-amplitude shape deformation under the excitation action of heating conditions of the heating layer, so that the adhesion of accumulated ice is damaged, and mechanical deicing is realized.

The deicing layer 1 in this embodiment is made of an epoxy resin material having a shape memory function.

A plurality of first heat transfer sheet layer structures 6 are doped in the deicing layer 1, and the first heat transfer sheet layer structures 6 are perpendicular to the outer curved surface.

The first heat transfer laminated structure 6 can transfer heat generated by the heating layer to the ice layer attached to the surface of the paddle body 4, the ice layer is heated, heating deicing is achieved, combination of mechanical deicing and heating deicing is achieved, the deicing effect is good, the heat utilization rate is improved, and heat loss is reduced.

The first heat transfer lamellar structure 6 in the embodiment adopts a graphene oxide lamellar structure, the graphene oxide two-dimensional material has the characteristic of anisotropy, the graphene oxide layers are distributed along the direction perpendicular to the outer curved surface and are consistent with a heat transfer path to serve as a reinforced heat transfer enhancing phase, and the aim of preventing and removing ice of the low-energy-consumption wind power blade is fulfilled by combining two ice preventing and removing principles of heat transfer and shape memory.

When the paddle body 4 freezes, along the span direction of the paddle body 4, namely along the installation end to the most advanced direction of the paddle body, the thickness that freezes gradually increases, and therefore, along the span direction of the paddle body, the distribution density of the first heat transfer sheet layer structure 6 gradually increases.

Specifically, along the span direction of the blade body, the region of the blade body to be deiced is divided into four regions A1, A2, A3 and A4, the doping amount of graphite oxide in the region A4 is higher than that in the region A3, the doping amount of graphene oxide in the region A3 is higher than that in the region A2, and the doping amount of graphene oxide in the region A2 is higher than that in the region A1.

When the paddle body freezes, along the chordwise direction of paddle body 4, by the freezing thickness of the direction of paddle body 4 center to both sides reduce gradually, consequently along the chordwise direction of paddle body, the distribution density of paddle body center to the first heat transfer lamellar structure of both sides direction reduces gradually.

Specifically, along the chord direction of the blade body 4, the center region of the blade body is a B3 region, two sides of a B3 region are a B2 region and a B1 region in sequence, the doping amount of graphene oxide in the B3 region is higher than that in the B2 region, and the doping amount of graphene oxide in the B2 region is higher than that in the B1 region.

By adopting the arrangement mode, the icing prevention and deicing effects are ensured, the arrangement quantity of the first heat transfer sheet layer structures 6 is reduced to the greatest extent, and the processing cost of the wind power blade is reduced.

The heating layer 2 is an existing polyimide heating film which is connected with a resistance wire, and the resistance wire is electrified for heating.

The heat insulating layer 3 is made of resin-based glass fiber materials, has lower heat transfer capacity, reduces the heat transferred from the heating layer to the inside of the wind power paddle, effectively reduces the heat damage of the heat of the ice prevention and removal heating layer 2 to the inside of the wind power paddle industry, and improves the ice prevention and removal efficiency.

In this embodiment, it is equipped with heat insulation layer 8 to lay on the groove face of recess, heat insulation layer 8 adopts current heat insulation material to make, the insulating layer is in contact with the heat insulation layer, deicing layer all is connected with the one end of a plurality of elastic components along chordwise two tip, in this embodiment, the elastic component adopts spring 5, it is specific, deicing layer is equipped with the push pedal along chordwise tip, the push pedal adopts high heat conduction material such as a section of thick bamboo or silver to make, be equipped with fixing bolt between the heat insulation layer of laying on the bottom groove face of push pedal and recess perpendicular to outer curved surface, fixing bolt overlaps there is the spring, spring one end and push pedal contact, the other end is in contact with the heat insulation layer, through setting up the spring, can prevent that deicing layer from producing the large deformation, influence the airfoil curve of paddle.

Meanwhile, a heat conduction material 7 is filled in a space between the end part of the anti-icing and deicing assembly along the chord direction of the blade body and the heat insulation layer of the bottom groove surface, and the heat conduction material 7 is a high heat conduction material such as copper or silver. The heat insulation layer is internally provided with a plurality of second heat transfer sheet structures which are parallel to the outer curved surface.

The second heat transfer lamellar structure in this embodiment adopts a graphene oxide lamellar structure.

The working principle of the anti-icing wind power blade of the embodiment is as follows:

the heating layer 2 is heated to generate heat, the heat is transmitted outwards through the first heat transfer laminated structure 6, the purpose of dissolving ice accumulated on the surface of the blade body 4 is achieved, and meanwhile, the deicing layer 1 is heated to deform under the action of the heating layer 2, and mechanical deicing is achieved.

The second heat transfer lamellar structure in the thermal-insulation layer 3 transfers heat to the heat conduction material 7, and the heat conduction material transfers the heat and acts as the end part of the thermal excitation action and the deicing layer 1 again, so that the deicing layer is deformed, and the heat utilization rate and the deicing effect are improved.

Example 2

The present embodiment provides a wind turbine provided with the anti-icing wind turbine blade according to embodiment 1, and other structures of the wind turbine may be the existing structures, which will not be described in detail herein.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.

Claims

1. The utility model provides a prevent and remove off ice wind-powered electricity generation paddle, includes the paddle body, its characterized in that, the outer curved surface that the paddle body is met the wind is seted up flutedly, has set gradually insulating layer, zone of heating and the deicing layer of being made by shape memory material from inside to outside in the recess, and deicing layer inside is provided with a plurality of first heat transfer lamellar structures, and first heat transfer lamellar structure sets up with the outer curved surface perpendicularly.

2. The anti-icing wind power blade according to claim 1, wherein the deicing layer is made of an epoxy resin material with shape memory property.

3. The anti-icing wind turbine blade according to claim 1, wherein the heat insulation layer is made of a resin-based glass fiber material.

4. The anti-icing wind power blade according to claim 1, wherein the first heat transfer sheet structure is a graphene oxide sheet structure.

5. The wind turbine blade according to claim 1, wherein the distribution density of the first heat transfer sheet structure is gradually increased in the span direction of the blade body.

6. The anti-icing wind power blade according to claim 1, wherein the distribution density of the first heat transfer sheet layer structures in the direction from the center of the blade body to both sides is gradually reduced along the chord direction of the blade body.

7. The anti-icing wind power blade according to claim 1, wherein the heating layer is a polyimide heating film.

8. The anti-icing and deicing wind power blade according to claim 1, wherein the groove surface of the groove is paved with a heat insulating layer, the end part of the deicing layer along the chord direction of the blade body is connected with one ends of a plurality of elastic pieces, and the other ends of the elastic pieces are connected with the heat insulating layer paved in the groove surface at the bottom of the groove, which is vertical to the outer curved surface;

furthermore, the space between the end part of the deicing layer, the heat insulation layer and the end part of the heating layer along the chord direction and the heat insulation layer of the bottom groove surface is filled with heat conduction materials, and a plurality of second heat transfer laminated structures which are parallel to the outer curved surface are arranged in the heat insulation layer.

9. The anti-icing wind power blade according to claim 1, wherein the second heat transfer sheet structure is a graphene oxide sheet structure.

10. A wind power generator characterized by being provided with the anti-icing wind power blade according to any one of claims 1 to 9.