1. A manufacturing method of a wind power blade is characterized in that: the method comprises the following steps:

s1, laying the fiber reinforced material on the mould;

s2, laying a stripping layer on the fiber reinforced material, wherein the stripping layer is a piece of demoulding cloth;

s3, laying a high-permeability medium on the peeling layer, wherein the high-permeability medium is a flow guide net;

s4, arranging a flow guide pipe above the flow guide net;

s5, coating and sealing by using a vacuum film;

s6, pumping air in the vacuum film to a negative pressure state by using a vacuum pump;

s7, feeding the resin into a flow guide pipe through a rubber inlet pipe, and uniformly distributing the resin into the die through the flow guide pipe;

s8, demolding and checking;

and S9, post-processing.

2. The method for manufacturing the wind power blade according to claim 1, wherein the method comprises the following steps: the resin in S7 is one of epoxy resin, polycarbonate and ABS resin.

3. The method for manufacturing the wind power blade according to claim 1, wherein the method comprises the following steps: the coating sprayed by the S9 is a polyurethane coating.

4. The method for manufacturing the wind power blade according to claim 1, wherein the method comprises the following steps: the fiber reinforcement material in the S1 is one of glass fiber, carbon fiber and aramid fiber.

5. The method for manufacturing the wind power blade according to claim 1, wherein the method comprises the following steps: and in the step S6, when the vacuum film is pumped to a negative pressure state by using a vacuum pump, controlling the vacuum degree to be less than 0.06 MPa.

6. The method for manufacturing the wind power blade according to claim 1, wherein the method comprises the following steps: the demolding cloth in the S2 is made of Teflon glass fiber cloth, the Teflon glass fiber cloth is woven into net-shaped base cloth by taking glass fiber and Kevlar as base materials, then Teflon resin is coated on the net-shaped base cloth, and the Teflon glass fiber cloth is manufactured after drying.

7. The method for manufacturing the wind power blade according to claim 1, wherein the method comprises the following steps: when the demoulding is inspected in the step S8, an ultrasonic flaw detector is used for inspecting whether the surface of the blade has cracks or defects; and performing fatigue testing, strength testing, mass distribution measurement, natural frequency and damping determination.

8. The method for manufacturing the wind power blade according to claim 1, wherein the method comprises the following steps: the S9 post-processing includes the steps of: firstly, cleaning by using a cleaning solution of 30-50MPA, wherein the cleaning solution is saline water with the mass fraction of 1%, and then, after the surface of the cleaning solution is dried, coating an antifouling coating on the surface of the cleaning solution.

9. The method for manufacturing the wind power blade according to claim 8, wherein: the antifouling coating comprises the following components in parts by mass: 80-85% of alkyd resin, 5-8% of benzoyl peroxide, 5-8% of corrosion inhibitor and the balance of dispersing agent.

Background

The wind power generator blade is a thin shell structure made of composite materials. The structure is divided into three parts. (1) Root part: the material is generally a metal structure; (2) a housing: typically glass reinforced plastic; (3) keel (stiffener or reinforcement frame): typically a glass fibre reinforced composite or a carbon fibre reinforced composite. The existing fan production process is more, but the general production efficiency is low.

The prior Chinese patent with publication number CN101186116A discloses a production process of a wind driven generator blade. The production process of the fan blade comprises a step of manufacturing the root of the blade, a step of preparing a mould, a step of vacuum impregnation, a step of curing, a step of reinforcing, a step of demoulding, a step of separating the blade and the mould.

The above-mentioned fishplate processing technique has some disadvantages, such as: the fan blade has the defects of easy occurrence of pinholes and the like and low strength due to the existence of gas during injection molding, and the process needs to be improved.

Disclosure of Invention

In view of the problems mentioned in the background art, the present invention is directed to a method for manufacturing a wind turbine blade, so as to solve the problems mentioned in the background art.

The technical purpose of the invention is realized by the following technical scheme:

a manufacturing method of a wind power blade comprises the following steps:

s1, laying the fiber reinforced material on the mould;

s2, laying a stripping layer on the fiber reinforced material, wherein the stripping layer is a piece of demoulding cloth;

s3, laying a high-permeability medium on the peeling layer, wherein the high-permeability medium is a flow guide net;

s4, arranging a flow guide pipe above the flow guide net;

s5, coating and sealing by using a vacuum film;

s6, pumping air in the vacuum film to a negative pressure state by using a vacuum pump;

s7, feeding the resin into a flow guide pipe through a rubber inlet pipe, and uniformly distributing the resin into the die through the flow guide pipe;

s8, demolding and checking;

and S9, post-processing.

Preferably, the resin in S7 is one of epoxy resin, polycarbonate and ABS resin.

Preferably, the coating sprayed by the S9 is a polyurethane coating.

Preferably, the fiber reinforcement material in S1 is one of glass fiber, carbon fiber and aramid fiber.

Preferably, in S6, when the vacuum pump is used to pump the vacuum film to a negative pressure state, the vacuum degree is controlled to be less than 0.06 MPa.

Preferably, the release fabric in S2 is teflon glass fiber fabric, the teflon glass fiber fabric is woven into a mesh-shaped base fabric by using glass fiber and kevlar as base materials, and then coated with teflon resin, and dried to obtain the teflon glass fiber fabric.

Preferably, in the step S8, when the mold release inspection is performed, an ultrasonic flaw detector is used to inspect whether cracks or defects exist on the surface of the blade; and performing fatigue testing, strength testing, mass distribution measurement, natural frequency and damping determination.

Preferably, the S9 post-processing includes the following steps: firstly, cleaning by using a cleaning solution of 30-50MPA, wherein the cleaning solution is saline water with the mass fraction of 1%, and then, after the surface of the cleaning solution is dried, coating an antifouling coating on the surface of the cleaning solution. .

Preferably, the antifouling coating comprises the following components in percentage by mass: 80-85% of alkyd resin, 5-8% of benzoyl peroxide, 5-8% of corrosion inhibitor and the balance of dispersing agent.

In summary, the invention mainly has the following beneficial effects:

the manufacturing method of the wind power blade uses the fiber reinforced material as an external reinforcement, uses the demolding cloth to facilitate demolding, uses the guide pipe to ensure the uniform distribution of injection molding, adopts the vacuum pump and the vacuum film during injection molding, can avoid microcracks generated by injection molding, greatly improves the service life of the wind power blade, and has more reasonable working procedures; in addition, the manufacturing method of the wind power blade is short and reasonable in process and low in production and arrangement cost.

Drawings

FIG. 1 is a schematic diagram of the process of the present invention;

fig. 2 is a view of the blade structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1 and 2, a method of manufacturing a wind turbine blade includes the steps of:

s1, laying the fiber reinforced material on the mould;

s2, laying a stripping layer on the fiber reinforced material, wherein the stripping layer is a piece of demoulding cloth;

s3, laying a high-permeability medium on the peeling layer, wherein the high-permeability medium is a flow guide net;

s4, arranging a flow guide pipe above the flow guide net;

s5, coating and sealing by using a vacuum film;

s6, pumping air in the vacuum film to a negative pressure state by using a vacuum pump;

s7, feeding the resin into a flow guide pipe through a rubber inlet pipe, and uniformly distributing the resin into the die through the flow guide pipe;

s8, demolding and checking;

and S9, post-processing.

Wherein the resin in S7 is an epoxy resin.

Wherein the coating sprayed by the S9 is a polyurethane coating.

Wherein the fiber reinforcement in S1 is glass fiber.

In S6, when the vacuum film is pumped to negative pressure by the vacuum pump, the vacuum degree is controlled to be less than 0.06 MPa.

The release cloth in the S2 is Teflon glass fiber cloth which is woven into a net-shaped base cloth by taking glass fiber and Kevlar as base materials, then Teflon resin is coated on the base cloth, and the Teflon glass fiber cloth is manufactured after drying.

When the demoulding is inspected in S8, an ultrasonic flaw detector is used for inspecting whether the surface of the blade has cracks or defects; and performing fatigue testing, strength testing, mass distribution measurement, natural frequency and damping determination.

Wherein, the post-processing of S9 includes the following steps: firstly, cleaning with a cleaning solution of 30MPA, wherein the cleaning solution is saline water with the mass fraction of 1%, and then, after the surface of the cleaning solution is dried, coating an antifouling coating on the surface of the cleaning solution. .

Wherein the antifouling coating comprises the following components in parts by mass: 80% of alkyd resin, 5% of benzoyl peroxide, 5% of corrosion inhibitor and the balance of dispersant.

The manufacturing method of the wind power blade uses the fiber reinforced material as an external reinforcement, uses the demolding cloth to facilitate demolding, uses the guide pipe to ensure the uniform injection molding performance, adopts the vacuum pump and the vacuum film during injection molding, can avoid microcracks generated by injection molding, greatly improves the service life of the wind power blade, and has reasonable working procedures; in addition, the manufacturing method of the wind power blade is short and reasonable in process and low in production and arrangement cost.

Example 2

Referring to fig. 1 and 2, a method of manufacturing a wind turbine blade includes the steps of:

s1, laying the fiber reinforced material on the mould;

s2, laying a stripping layer on the fiber reinforced material, wherein the stripping layer is a piece of demoulding cloth;

s3, laying a high-permeability medium on the peeling layer, wherein the high-permeability medium is a flow guide net;

s4, arranging a flow guide pipe above the flow guide net;

s5, coating and sealing by using a vacuum film;

s6, pumping air in the vacuum film to a negative pressure state by using a vacuum pump;

s7, feeding the resin into a flow guide pipe through a rubber inlet pipe, and uniformly distributing the resin into the die through the flow guide pipe;

s8, demolding and checking;

and S9, post-processing.

Wherein the resin in S7 is polycarbonate.

Wherein the coating sprayed by the S9 is a polyurethane coating.

Wherein the fiber reinforcement in S1 is carbon fiber.

In S6, when the vacuum film is pumped to negative pressure by the vacuum pump, the vacuum degree is controlled to be less than 0.06 MPa.

The release cloth in the S2 is Teflon glass fiber cloth which is woven into a net-shaped base cloth by taking glass fiber and Kevlar as base materials, then Teflon resin is coated on the base cloth, and the Teflon glass fiber cloth is manufactured after drying.

When the demoulding is inspected in S8, an ultrasonic flaw detector is used for inspecting whether the surface of the blade has cracks or defects; and performing fatigue testing, strength testing, mass distribution measurement, natural frequency and damping determination.

Wherein, the post-processing of S9 includes the following steps: firstly, cleaning with 50MPA cleaning solution, wherein the cleaning solution is 1% by mass of saline water, and then drying the surface of the cleaning solution and coating an antifouling coating on the surface of the cleaning solution. .

Wherein the antifouling coating comprises the following components in parts by mass: 85% of alkyd resin, 5% of benzoyl peroxide, 6% of corrosion inhibitor and the balance of dispersing agent.

Example 3

Referring to fig. 1 and 2, a method of manufacturing a wind turbine blade includes the steps of:

s1, laying the fiber reinforced material on the mould;

s2, laying a stripping layer on the fiber reinforced material, wherein the stripping layer is a piece of demoulding cloth;

s3, laying a high-permeability medium on the peeling layer, wherein the high-permeability medium is a flow guide net;

s4, arranging a flow guide pipe above the flow guide net;

s5, coating and sealing by using a vacuum film;

s6, pumping air in the vacuum film to a negative pressure state by using a vacuum pump;

s7, feeding the resin into a flow guide pipe through a rubber inlet pipe, and uniformly distributing the resin into the die through the flow guide pipe;

s8, demolding and checking;

and S9, post-processing.

Wherein the resin in S7 is an ABS resin.

Wherein the coating sprayed by the S9 is a polyurethane coating.

Wherein, the fiber reinforced material in S1 is aramid fiber.

In S6, when the vacuum film is pumped to negative pressure by the vacuum pump, the vacuum degree is controlled to be less than 0.06 MPa.

The release cloth in the S2 is Teflon glass fiber cloth which is woven into a net-shaped base cloth by taking glass fiber and Kevlar as base materials, then Teflon resin is coated on the base cloth, and the Teflon glass fiber cloth is manufactured after drying.

When the demoulding is inspected in S8, an ultrasonic flaw detector is used for inspecting whether the surface of the blade has cracks or defects; and performing fatigue testing, strength testing, mass distribution measurement, natural frequency and damping determination.

Wherein, the post-processing of S9 includes the following steps: firstly, cleaning with 50MPA cleaning solution, wherein the cleaning solution is 1% by mass of saline water, and then drying the surface of the cleaning solution and coating an antifouling coating on the surface of the cleaning solution. .

Wherein the antifouling coating comprises the following components in parts by mass: 85% of alkyd resin, 5% of benzoyl peroxide, 5% of corrosion inhibitor and the balance of dispersant.

Example 4

Referring to fig. 1 and 2, a method of manufacturing a wind turbine blade includes the steps of:

s1, laying the fiber reinforced material on the mould;

s2, laying a stripping layer on the fiber reinforced material, wherein the stripping layer is a piece of demoulding cloth;

s3, laying a high-permeability medium on the peeling layer, wherein the high-permeability medium is a flow guide net;

s4, arranging a flow guide pipe above the flow guide net;

s5, coating and sealing by using a vacuum film;

s6, pumping air in the vacuum film to a negative pressure state by using a vacuum pump;

s7, feeding the resin into a flow guide pipe through a rubber inlet pipe, and uniformly distributing the resin into the die through the flow guide pipe;

s8, demolding and checking;

and S9, post-processing.

Wherein the resin in S7 is an epoxy resin.

Wherein the coating sprayed by the S9 is a polyurethane coating.

Wherein the fiber reinforcement in S1 is glass fiber.

In S6, when the vacuum film is pumped to negative pressure by the vacuum pump, the vacuum degree is controlled to be less than 0.06 MPa.

The release cloth in the S2 is Teflon glass fiber cloth which is woven into a net-shaped base cloth by taking glass fiber and Kevlar as base materials, then Teflon resin is coated on the base cloth, and the Teflon glass fiber cloth is manufactured after drying.

When the demoulding is inspected in S8, an ultrasonic flaw detector is used for inspecting whether the surface of the blade has cracks or defects; and performing fatigue testing, strength testing, mass distribution measurement, natural frequency and damping determination.

Wherein, the post-processing of S9 includes the following steps: firstly, cleaning with a cleaning solution of 40MPA, wherein the cleaning solution is saline water with the mass fraction of 1%, and then, after the surface of the cleaning solution is dried, coating an antifouling coating on the surface of the cleaning solution. .

Wherein the antifouling coating comprises the following components in parts by mass: 83% of alkyd resin, 7% of benzoyl peroxide, 7% of corrosion inhibitor and the balance of dispersant.

In order to verify the performance of the blade processed by the manufacturing method of the wind power blade, the following experiment is carried out, wherein the blade of a comparison group and the blades produced in the embodiment 1, the embodiment 2, the embodiment 3 and the embodiment 4 are selected for carrying out the experiment, and the numerical value of the comparison group is used as a reference for comparison.

The experimental contents and results are given in the following table:

	strength of	Anti-rust ability	Wear resistance	Degree of deformation
					Control group	1	1	1	1
Example 1	2	2	3	6％
					Example 2	3	2.3	2.5	4％
Example 3	5	2.7	2.4	8％
					Example 4	1.7	1.8	2.1	2％

Through experiments, the results of the blades produced by the processes of the embodiment 1, the embodiment 2, the embodiment 3 and the embodiment 4 are better than those of the blades produced by the conventional process, and the embodiment 3 is the best embodiment.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.