CN115875188A

CN115875188A - Blade spar cap, manufacturing method of blade spar cap, blade and wind generating set

Info

Publication number: CN115875188A
Application number: CN202111144099.9A
Authority: CN
Inventors: 朱亚坤; 刘宝锋
Original assignee: Jiangsu Goldwind Science and Technology Co Ltd
Current assignee: Jiangsu Goldwind Science and Technology Co Ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2023-03-31

Abstract

The invention provides a blade spar cap, a manufacturing method of the blade spar cap, a blade and a wind generating set. The blade spar cap includes a plurality of reinforcement plates including a damping reinforcement plate including a reinforcement layer and a damping material. According to the invention, by introducing damping material into the blade spar cap, the damping performance can be better exerted while the blade load is carried.

Description

Blade spar cap, manufacturing method of blade spar cap, blade and wind generating set

Technical Field

The invention relates to the technical field of wind power generation, in particular to a blade beam cap, a manufacturing method of the blade beam cap, a blade and a wind generating set.

Background

With the development of large-scale and high-power wind generating sets, wind power blades are lengthened, expanded, softened and refined, so that the blades are influenced by complex external force in the operation process, and the harmful flutter problem is easy to occur.

The damping material can convert mechanical vibration energy into heat energy to be consumed, so that the damping material plays a role in vibration reduction and noise reduction. Accordingly, damping material may be applied to the fan blade to reduce vibration of the blade. In the prior art, damping material is bonded to the inside of the blade shell, which not only increases the weight of the blade to cause a reduction in power generation efficiency, but also has a limited vibration damping effect. In addition, the damping material has the risk of droing along with the continuous swing of blade, and the reliability is low.

Disclosure of Invention

It is an object of the present invention to provide a blade spar cap which is capable of better exerting damping properties in the blade.

Another object of the present invention is to provide a blade spar cap which can improve the power generation efficiency of a wind turbine and improve the operational reliability of the blade.

It is another object of the present invention to provide a blade spar cap that is capable of balancing damping performance and mechanical strength modulus.

According to an aspect of the present invention, there is provided a blade spar cap comprising a plurality of reinforcing plates including a damping reinforcing plate, the damping reinforcing plate comprising a reinforcing layer and a damping material.

Optionally, the damping material is impregnated in the reinforcement layer.

Optionally, the plurality of reinforcement plates further comprises a non-damped reinforcement plate comprising a reinforcement layer impregnated with a resin.

Optionally, the reinforcement layers in the damping reinforcement plates and the reinforcement layers in the non-damping reinforcement plates are glass fibers and/or carbon fibers.

Optionally, the damping reinforcing plates are spaced from the non-damping reinforcing plates in a width direction of the blade spar cap and/or in a thickness direction of the blade spar cap.

Optionally, the damping reinforcing plate further includes inorganic cloth adhered to both sides of the reinforcing layer of the damping reinforcing plate by a resin film.

Optionally, the damped and undamped reinforcement plates are pultruded plates.

Optionally, the blade spar cap further comprises inorganic cloth interposed between adjacent reinforcement plates.

Optionally, the damping material comprises a viscoelastic damping rubber and a vulcanizing agent.

Optionally, the damping material further comprises a reinforcing agent, a plasticizer, an antioxidant and a coupling agent. The damping material comprises 60-80 parts by weight of viscoelastic damping rubber, 10-20 parts by weight of reinforcing agent, 1-5 parts by weight of plasticizer, 5-10 parts by weight of antioxidant, 1-3 parts by weight of vulcanizing agent and 0.5-3 parts by weight of coupling agent.

Optionally, the reinforcing layer in the damping reinforcing plate is glass fiber, and the reinforcing layer in the non-damping reinforcing plate is carbon fiber.

According to another aspect of the present invention, there is provided a method of manufacturing a blade spar cap, the method comprising: preparing a damping solution; dipping the enhancement layer into a damping solution to prepare a damping enhancement plate; and paving a damping reinforcing plate.

Optionally, the step of preparing the damping material comprises: preparing raw materials, wherein the raw materials comprise 60-80 parts by weight of viscoelastic damping rubber, 10-20 parts by weight of reinforcing agent, 1-5 parts by weight of plasticizer, 5-10 parts by weight of antioxidant, 1-3 parts by weight of vulcanizing agent and 0.5-3 parts by weight of coupling agent; preparing the raw materials into slices by using an open mill; the flakes are dissolved in an organic solvent.

Optionally, the step of preparing the damping reinforcing plate further comprises: pre-forming the reinforcement layer into a sheet after dipping the reinforcement layer into the damping solution; drying the plate to remove the organic solvent; bonding inorganic cloth coated with thermosetting resin film on two sides of the dried board; and forming the board after the inorganic cloth is bonded to form the damping reinforcing board.

Optionally, the blade spar cap further comprises a non-damping reinforcing plate, the non-damping reinforcing plate comprises a reinforcing layer impregnated with resin, and in the step of laying the damping reinforcing plate, the damping reinforcing plate and the non-damping reinforcing plate are laid at intervals in the width direction and/or the thickness direction of the blade spar cap.

Optionally, the manufacturing method further comprises: inorganic cloth is interposed between adjacent reinforcing plates.

Optionally, the manufacturing method comprises: and pouring resin to form a prefabricated member of the blade beam cap.

According to another aspect of the present disclosure, there is provided a blade comprising a blade spar cap as described above.

According to another aspect of the present disclosure, there is provided a wind park comprising a blade as described above.

According to the invention, by introducing damping material into the blade spar cap, the damping performance can be better exerted while the blade load is carried.

According to the invention, the reinforcing layer is impregnated with the damping material, so that the total weight of the blade beam cap is reduced, the power generation efficiency of the fan is improved, the falling risk of the damping structure on the surface of the shell is effectively solved, and the operation reliability of the blade is improved.

According to the invention, the balance of the damping performance and the mechanical strength modulus of the blade beam cap can be realized by jointly comprising the damping reinforcing plate and the non-damping reinforcing plate. According to the invention, the balance of the damping performance and the mechanical strength modulus of the blade beam cap is realized through different mixed stacking modes of the damping pultruded plate and the common pultruded plate.

According to the invention, the damping reinforcing plate is manufactured by using the pultrusion process, so that continuous processing and forming can be realized, and the production efficiency and the stability of the product are improved.

According to the invention, the inorganic cloth is bonded to two sides of the reinforcing layer in the damping reinforcing plate through the resin film, on one hand, the inorganic cloth is favorable for resin infusion and conduction, and on the other hand, the resin component of the resin film can be chemically bonded with the viscoelastic damping rubber in the damping material by using the coupling agent, so that the problem of matching between the rubber and the thermosetting resin is solved.

According to the invention, the balance of the damping performance and the mechanical strength modulus of the blade beam cap is realized through different mixing modes of the damping pultruded plate and the common pultruded plate.

Drawings

The above and other objects and features of the present invention will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a chordwise cross-sectional view of a blade according to an embodiment of the invention;

2-5 schematically illustrate an arrangement of reinforcement plates in a blade spar cap according to an embodiment of the present invention;

FIG. 6 is a flow chart of the preparation of a damping enhancing plate according to an embodiment of the present invention;

fig. 7 is a schematic view of the recycling apparatus of fig. 6.

The reference numbers illustrate: 20 is a blade, 21 is an upper shell, 22 is a lower shell, 23 is a blade beam cap, 24 is a web plate, 23R is a reinforcing plate, 1 is a drawframe, 2 is a guide device, 3 is a dipping tank, 4 is a preforming mold, 5 is a drying chamber, 6 is an air blower, 7 is an air draft device, 8 is a recovery device, 81 is a reflux condenser, 82 is a condensation pipe, 83 is circulating cooling water, 83A is a water inlet, 83B is a water outlet, 84 is a solvent collector, 9 is a guide roller, 10 is inorganic cloth, 11 is a first pair of compression rollers, 12 is a second pair of compression rollers, 13 is a forming mold, 14 is a tractor, and 15 is a cutting device.

Detailed Description

Hereinafter, a blade spar cap, a manufacturing method of the blade spar cap, a blade, and a wind turbine generator set according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Blade spar cap

As shown in FIG. 1, blade 20 includes an upper shell 21, a lower shell 22, a blade spar cap 23 disposed within upper and

lower shells

21, 22, and a web 24 supporting blade spar cap 23. Next, the structure of the blade spar cap 23 will be described in detail.

According to embodiments of the invention, the blade spar cap 23 may comprise a plurality of reinforcement plates 23R, the plurality of reinforcement plates 23R may comprise damping reinforcement plates, and the damping reinforcement plates may comprise a reinforcement layer and a damping material.

The blade beam cap is used as a core component for bearing the force of the blade, and is required to have higher strength and modulus and bear the main load of the vibration of the blade. However, the main components of the blade spar cap are thermosetting resin and glass fiber or carbon fiber, the damping loss factors of the thermosetting resin and the glass fiber or the carbon fiber are very low, the rigidity is high, when the blade swings and twists under external force, the energy of vibration is difficult to be consumed or converted, and the blade spar cap has a large vibration amplitude, so that the improvement of the damping performance of the blade is not facilitated.

The invention can better exert damping performance while bearing the blade load by introducing damping material into the blade spar cap 23. The damping material can absorb and convert the energy of vibration to offset the load and vibration on the blade, thus greatly reducing the problem of blade flutter.

According to embodiments of the invention, the damping material may be impregnated in the reinforcement layer. In the prior art, the reinforcing layer is impregnated with resin, and in the invention, the reinforcing layer is impregnated with damping materials, so that the total weight of the blade beam cap is reduced, the power generation efficiency of the fan is improved, the falling risk of the damping structure on the surface of the shell is effectively solved, and the operation reliability of the blade is improved.

According to embodiments of the present invention, the damping material into which the reinforcement layer is impregnated may comprise a viscoelastic damping rubber and a vulcanizing agent. In addition, in order to enhance the mechanical property, the processing property, the aging property, the interface bonding property and the like of the viscoelastic damping rubber, the damping material can also comprise a reinforcing agent, a plasticizer, an antioxidant and a coupling agent.

Alternatively, the viscoelastic damping rubber material may be at least one of nitrile rubber, neoprene rubber, styrene butadiene rubber, butyl rubber, natural rubber, brominated butyl rubber, acrylate rubber. Alternatively, the reinforcing agent may be carbon black. Alternatively, the plasticizer may be at least one of stearic acid, paraffin oil, coal tar, and aromatic oil. Alternatively, the antioxidant may be at least one of hindered phenol type antioxidant 1010, antioxidant 1076, phosphorus type antioxidant 168, thioether type antioxidant 1520. Alternatively, the vulcanizing agent may be sulfur, and the coupling agent is at least one selected from a silane coupling agent, a titanate coupling agent, and an aluminate coupling agent.

According to the embodiment of the invention, the vulcanizing agent is added into the viscoelastic damping rubber, so that the rubber molecular chains are subjected to a crosslinking reaction through high temperature and high pressure in the subsequent processing process, the rubber molecules are changed into a net structure from a linear structure, and the strength and the toughness are greatly improved. The reinforcing agent is added into the viscoelastic damping rubber, so that the strength of the viscoelastic damping rubber can be increased, and the viscoelastic damping rubber has certain strength and toughness as a blade damping material. The processing performance of the rubber material can be improved by adding the plasticizer into the viscoelastic damping rubber. By adding the antioxidant into the viscoelastic damping rubber, the aging resistance and the processing performance of the rubber material can be improved. By adding the coupling agent into the viscoelastic damping rubber, the active functional groups on the surface of the rubber material can be increased, and preparation is provided for the subsequent chemical bonding of rubber and thermosetting resin and the improvement of the interface bonding strength and interaction.

According to the embodiment of the invention, the content of the viscoelastic damping rubber can be 60-80 parts by weight, the content of the vulcanizing agent can be 1-3 parts by weight, the content of the reinforcing agent can be 10-20 parts by weight, the content of the plasticizer can be 1-5 parts by weight, the content of the antioxidant can be 5-10 parts by weight, and the content of the coupling agent can be 0.5-3 parts by weight.

The viscoelastic damping rubber is used as a base material, and the content of the viscoelastic damping rubber determines the basic performance of the damping material and the matching and mixing effects of the viscoelastic damping rubber and other additives. When the content of the viscoelastic damping rubber is less than 60 parts by weight, the performance of the base material is insufficient, and when the content of the viscoelastic damping rubber is more than 80 parts by weight, the content of other additives is relatively low, and the performance improvement effect is reduced. The vulcanizing agent can make rubber molecular chains generate cross-linking reaction, and the rubber molecules are changed into a net structure from a linear structure, so that the rubber material with mature performance is obtained. When the content of the vulcanizing agent is less than 1 part by weight, insufficient crosslinking reaction is easily caused, the mechanical property of the rubber is poor, and when the content of the vulcanizing agent is more than 3 parts by weight, crosslinking reaction transition is easily caused, the strength of the rubber material is too high, and the processability is poor.

The reinforcing agent can increase the strength and toughness of the viscoelastic damping rubber, and when the content of the reinforcing agent is less than 10 parts by weight, the reinforcing performance is insufficient, and when the content of the reinforcing agent is more than 20 parts by weight, the processing and mixing effects are reduced. The plasticizer can improve the fluidity and the processability of the damping rubber material, when the content of the plasticizer is lower than 1 part by weight, the processability is poor, the rubber viscosity is high, the shear resistance is high, and when the content of the plasticizer is higher than 5 parts by weight, the fluidity is too high, so that the high mechanical strength of the material is not maintained. The antioxidant can improve the aging resistance of the rubber material, when the content of the antioxidant is less than 5 parts by weight, the aging resistance of the material is easily reduced, the service life is reduced, and when the content of the antioxidant is more than 10 parts by weight, the processing and mixing effects under the condition that the aging resistance meets requirements are easily reduced. The coupling agent can increase the surface activity of the rubber material, is beneficial to improving the subsequent interface bonding performance with other materials, easily causes insufficient surface activity and poor interface bonding performance when the content of the coupling agent is lower than 0.5 part by weight, easily causes material dosage transition when the content of the coupling agent is higher than 3 parts by weight, degrades and volatilizes in the processing process of the coupling agent, and influences the mechanical strength of the final material.

According to an embodiment of the present invention, the damping reinforcing plate may further include inorganic cloth, and the inorganic cloth may be adhered to both sides of the reinforcing layer by a resin film. Inorganic cloth is bonded on two sides of the reinforcing plate, so that resin infusion and conduction are facilitated. In addition, the coupling agent in the damping material can make the viscoelastic damping rubber surface and the active functional group on the surface of the thermosetting resin generate cross-linking reaction, so the interface joint of the two-phase material is effectively bonded through chemical bonds, and the strength is greatly improved.

According to the embodiment of the invention, the inorganic cloth can be glass fiber plain mesh cloth with gram weight of 30-100g/m ² . The resin film may be a thermosetting resin film. The thermosetting resin can be at least one of epoxy resin, polyurethane resin, acrylate resin, vinyl ester resin and the like.

According to an embodiment of the present invention, the plurality of reinforcement plates 23R may further include a non-damping reinforcement plate, and the non-damping reinforcement plate may include a reinforcement layer impregnated with a resin. The invention can realize the balance of the damping performance and the mechanical strength modulus of the blade beam cap 23 by jointly comprising the damping reinforcing plate and the non-damping reinforcing plate.

According to an embodiment of the invention, the damping enhancing plates and the non-damping enhancing plates may be arranged at a distance in the width direction of the blade spar cap 23. According to an embodiment of the invention, the damping enhancing plates and the non-damping enhancing plates may be arranged spaced apart in the thickness direction of the blade spar cap 23. However, the damping enhancing plates and the non-damping enhancing plates may be arranged at intervals only in one of the width direction and the thickness direction of the blade spar cap 23.

According to the invention, "spaced arrangement" may mean that the damping reinforcing plate and the non-damping reinforcing plate are spaced at regular intervals, or that the damping reinforcing plate and the non-damping reinforcing plate are not spaced at regular intervals. For example, the damped and undamped doublers may be spaced in a regular manner of ABAB, AABBAABB, abbabbabbab, etc., or in an irregular manner of ABBABA, etc.

In addition, according to an embodiment of the present invention, only one of the damping enhancing plate and the non-damping enhancing plate may be provided in the length direction of the blade spar cap 23, but is not limited thereto. For example, in the length direction of the blade spar cap 23, both damping and non-damping reinforcing plates may be provided.

According to an embodiment of the invention, the reinforcement layers in the damped reinforcement plates and the reinforcement layers in the non-damped reinforcement plates may be glass fibers and/or carbon fibers. The reinforcing layer in the damping reinforcing plate can be glass fiber or carbon fiber or a mixture of glass fiber and carbon fiber, and the reinforcing layer in the non-damping reinforcing plate can be glass fiber or carbon fiber or a mixture of glass fiber and carbon fiber.

When the blade spar cap 23 includes a plurality of damping reinforcing plates and a plurality of non-damping reinforcing plates, the reinforcing layers in the respective damping reinforcing plates may be the same or different, and the reinforcing layers in the respective non-damping reinforcing plates may be the same or different, without particular limitation.

Fig. 2 to 5 schematically show an arrangement of reinforcement plates in a blade spar cap 23 according to an embodiment of the invention. Fig. 2 to 5 are views of the blade 20 as viewed from the root toward the tip of the blade 20.

In fig. 2 to 5, DG denotes a damping reinforcing plate in which a reinforcing layer is made of glass fiber, DC denotes a damping reinforcing plate in which a reinforcing layer is made of carbon fiber, NG denotes a non-damping reinforcing plate in which a reinforcing layer is made of glass fiber, and NC denotes a non-damping reinforcing plate in which a reinforcing layer is made of carbon fiber. In fig. 2 to 5, the left-right direction indicates the width direction of the blade spar cap 23 (corresponding to the chord direction of the blade 20), and the up-down direction indicates the thickness direction of the blade spar cap 23 (corresponding to the thickness direction of the blade 20).

In fig. 2, DC and NC are alternately arranged in the width direction and the thickness direction of the blade spar cap 23. In fig. 3, DG and NG are alternately arranged in the width direction and the thickness direction of the blade spar cap 23. In fig. 4, only DG is provided in the width direction of the blade spar cap 23, and DG and NC are alternately arranged in the thickness direction of the blade spar cap 23. In fig. 5, DC and NG are alternately arranged in the width direction of the blade spar cap 23, and two layers of DC and two layers of NG are alternately arranged in the thickness direction of the blade spar cap 23.

In addition, in fig. 2 to 5, along the length direction of the blade spar cap 23 (corresponding to the span direction of the blade 20), only the corresponding reinforcing plate in fig. 2 to 5 may be provided, for example, the first row and the first column of fig. 2 indicate that only DC is provided in the length direction of the blade spar cap 23.

It should be understood that the arrangement of the damping enhancing plates and the non-damping enhancing plates described in fig. 2 to 5 is only an example. For example, in the width direction and thickness direction of the blade spar cap 23 in fig. 2 to 5, the number of the reinforcing plates may vary, and the arrangement form of the damping reinforcing plates and the non-damping reinforcing plates may vary. In addition, the number of reinforcing plates provided along the longitudinal direction of the blade spar cap 23 is not limited to one, and two or more kinds of reinforcing plates may be provided.

According to the embodiment of the invention, the non-damping reinforcing plate makes up the loss of the rigidity and modulus of the damping reinforcing plate and realizes the balance of the damping performance and the mechanical strength modulus of the blade beam cap by different mixing modes of the damping reinforcing plate and the non-damping reinforcing plate.

For example, for blades of up to now about 100 meters in length, the mechanical stiffness modulus (about 140 GPa) of common carbon fiber non-damped reinforced panels (e.g., pultruded panels) is much greater than the mechanical stiffness required by the design. Therefore, the mode of combining the glass fiber damping reinforcing plate (such as a pultrusion plate) with the common carbon fiber non-damping reinforcing plate can make up the defects of the rigidity and the modulus of the glass fiber damping reinforcing plate, the integral mechanical rigidity of the obtained blade beam cap can be higher than that of the blade beam cap prepared by the common glass fiber non-damping reinforcing plate (such as a pultrusion plate), the problems of excessive mechanical rigidity of the carbon fiber non-damping reinforcing plate (such as a pultrusion plate) and insufficient mechanical rigidity of the glass fiber damping reinforcing plate are solved, and meanwhile, the damping performance of the blade beam cap can be greatly improved.

According to embodiments of the present invention, the damped and undamped reinforcement panels may be pultruded panels manufactured using a pultrusion process. The invention realizes the continuous processing and molding of the damping reinforcing plate by using the pultrusion process, and improves the production efficiency and the stability of the product.

According to an embodiment of the present invention, the blade spar cap 23 may further comprise inorganic cloth interposed between adjacent reinforcement plates. Inorganic cloth is inserted between the adjacent reinforcing plates, so that resin infusion and conduction are facilitated. According to an embodiment of the present invention, the inorganic cloth between adjacent reinforcing plates may be a glass fiber scrim having a grammage of 100-300g/m ² 。

According to embodiments of the invention, after stacking the damping reinforcement plates and the non-damping reinforcement plates, a thermosetting resin may be vacuum infused to form a preform for the blade spar cap. Alternatively, the damping reinforcing plate and the non-damping reinforcing plate can be stacked on the blade shell forming mold, and then the damping reinforcing plate and the non-damping reinforcing plate are poured with resin together with the paving skin and integrally co-cured and formed.

Method for manufacturing blade spar cap

Hereinafter, a method of manufacturing the blade spar cap will be described in detail, and a description overlapping with the above description will be omitted for the sake of brevity and emphasis.

According to an embodiment of the invention, a method of manufacturing a blade spar cap may comprise: preparing a damping solution; dipping the enhancement layer into a damping solution to prepare a damping enhancement plate; and paving a damping reinforcing plate.

1. Preparation of damping solution

First, raw materials are prepared. The raw materials comprise 60-80 parts by weight of viscoelastic damping rubber, 10-20 parts by weight of reinforcing agent, 1-5 parts by weight of plasticizer, 5-10 parts by weight of antioxidant, 1-3 parts by weight of vulcanizing agent and 0.5-3 parts by weight of coupling agent.

Then, the above raw materials were prepared into flakes using an open mill. As an example, the roll spacing of the open mill can be adjusted to be 1mm-5mm, the temperature is 20 ℃ to 60 ℃, viscoelastic damping rubber is repeatedly plasticated through the open mill for 7-10 times, reinforcing agent, plasticizer and antioxidant are added, then plasticating through is continuously carried out for 7-10 times, then vulcanizing agent and coupling agent are added, plasticating through is continuously carried out for 7-10 times until the surface of the material is smooth and has no spots, and then the roll spacing of the open mill is adjusted to be about 1mm for sheet feeding.

Finally, the sheet is dissolved in an organic solvent to make a damping solution. For example, the composite viscoelastic damping rubber material which is plasticated uniformly can be cut into small pieces by scissors and added into an organic solvent for dissolving, the volume ratio of the damping material to the organic solvent is 1:2-1:5, and a damping solution is obtained after dissolving and is used as a sizing agent of a reinforcing layer in a subsequent pultrusion process. The organic solvent can be one of 120# gasoline, tetrahydrofuran and ethyl acetate.

2. Preparing damping reinforcing plate

The step of preparing the damping reinforcing plate comprises the following steps: dipping the reinforcement layer into a damping solution; preforming the reinforcement layer into a sheet; drying the plate to remove the organic solvent; adhering a mesh cloth coated with a thermosetting resin film on two sides of the dried board; and forming the plate after the grid cloth is bonded to form the damping reinforcing plate.

Fig. 6 is a flow chart of a preparation of a damping enhancing plate according to an embodiment of the present invention, and fig. 7 is a schematic view of a recycling apparatus of fig. 6.

As shown in fig. 6, a reinforcing layer (e.g. glass or carbon fibre) can be placed on the draw-off frame 1 and pulled out by the guide 2.

The drawn glass fiber or carbon fiber is immersed in the impregnation tank 3. The dipping tank 3 contains the damping solution prepared as described above as a sizing agent. The glass fibers or carbon fibers are impregnated with the sizing agent in the impregnation tank 3.

The glass fiber or carbon fiber impregnated with the damping solution is formed into the shape of a plate through a preforming mold 4.

The preformed sheet material passes through a drying chamber 5 to remove organic solvent contained in the damping solution, a plurality of blowers 6 are arranged below the drying chamber 5, and the temperature of air is controlled to be 80-100 ℃.

The content of the organic solvent is controlled to be less than 0.1 percent before the board is taken out of the drying chamber 5 by adjusting the blowing speed and the temperature of the blower 6. The whole drying chamber 5 is kept closed, and the organic solvent gas is prevented from leaking.

An air draft device 7 is arranged above the drying chamber 5 and used for recovering the volatilized organic solvent gas. FIG. 7 is a schematic diagram showing the recovery apparatus 8, wherein the suction opening is connected to a reflux condenser 81, the condenser 82 is spirally downward, the reflux condenser 81 is filled with circulating cooling water 83, the circulating cooling water 83 flows into the condenser 81 from a water inlet 83A and flows out of the condenser 81 from a water outlet 83B, so as to condense the organic solvent gas into liquid drops and flow back to the solvent collector 84.

Then, the pre-formed board after removing the solvent is discharged from the drying chamber 5, and the upper and lower guide rolls 9 respectively combine two inorganic cloths (e.g., glass fiber scrim) 10, which have the same width as the pre-formed board and have one surface facing the pre-formed board coated with an uncured thermosetting resin film, to the upper and lower surfaces of the pre-formed board. Alternatively, the thermosetting resin film has a thickness of 100 μm to 500 μm. The first pair of press rolls 11 preliminarily attaches the glass fiber plain weave mesh cloth to the preformed plate, and the mesh cloth is used as a base material to attach the thermosetting resin to the damping pultruded plate. Optionally, the gram weight of the glass fiber plain mesh fabric is 30-100g/m ² . The thermosetting resin can be one of epoxy resin, polyurethane resin, acrylate resin, vinyl ester resin and the like.

Then, the pre-formed board compounded with the inorganic cloth passes through the second pair of pressing rollers 12, the thermosetting resin is bonded on the upper and lower surfaces of the board by the pressure applied by the second pair of pressing rollers 12, so that the damping glue solution is more tightly combined with the thermosetting resin, and the air bubbles in the board can be removed.

Next, the preformed sheet passes through a forming die 13 to form the damping enhancing plate. In the forming process, the viscoelastic damping rubber in the damping material is vulcanized, and the coupling agent in the damping material enables the surface of the viscoelastic damping rubber and the active functional groups on the surface of the thermosetting resin to generate a cross-linking reaction, so that the interface joint of the two-phase material is effectively bonded through a chemical bond, and the strength is greatly improved. Optionally, the heating temperature of the forming mold 13 may be 150 to 190 ℃, and the forming time may be 2 to 10min.

Finally, the damping reinforcing plate provides traction force through the traction machine 14, and the damping reinforcing plate is pulled to the cutting device 15 to be cut according to actual length requirements.

3. Lay damping reinforcing plate

The blade spar cap may further comprise a non-damping reinforcing plate, which is manufactured in a similar way as the damping reinforcing plate described above, except that a thermosetting resin is used as a sizing agent when manufacturing the non-damping reinforcing plate, i.e. a thermosetting resin is contained in the impregnation tank 3 instead of the damping material. In addition, since the thermosetting resin does not contain an organic component, the drying chamber does not need to be sealed and the recovery device 8 is not needed.

When laying the damped and non-damped reinforcing plates, a hybrid arrangement of different ways may be made according to design requirements (e.g., as shown in fig. 2-5). In addition, inorganic cloth can be inserted between adjacent reinforcing plates to facilitate resin infusion and conduction. The inorganic cloth can be plain fiberglass mesh cloth with a gram weight of 100-300g/m ² 。

When it is desired to form a preform for a blade spar cap, vacuum infusion of a thermosetting resin may be performed. The thermosetting infusion resin can be one of epoxy resin, polyurethane resin, acrylate resin, vinyl ester resin and the like. Optionally, the vacuum infusion temperature is 20-80 ℃, and the infusion and curing time is 2-6 h.

However, instead of forming a preform for the blade spar cap, damping and non-damping reinforcing plates may be stacked on a blade shell forming mold, and then resin may be poured together with the laminate skin for integral co-curing forming.

Specific examples

72 parts by weight of nitrile rubber, 15 parts by weight of reinforcing carbon black, 3 parts by weight of stearic acid, 5 parts by weight of 1010 antioxidant, 3 parts by weight of sulfur and 2 parts by weight of silane coupling agent were prepared.

Adjusting the roll spacing of an open mill to be 3mm, keeping the temperature at 30 ℃, repeatedly plasticating the sticky nitrile-butadiene rubber through the open mill for 10 times, adding the reinforcing carbon black, the stearic acid and the antioxidant 1010, continuing to plasticate for 10 times, then adding the sulfur and the silane coupling agent, continuing to plasticate for 10 times until the surface of the material is smooth and has no spots, and then adjusting the roll spacing of the open mill to be about 1mm for feeding.

And finally, shearing the plasticated uniform composite viscoelastic damping material into small fragments by using scissors, and adding the small fragments into No. 120 gasoline for dissolving, wherein the volume ratio of the damping material to the gasoline solvent is 1:3. And obtaining damping solution after dissolution, and using the damping solution as a sizing agent of an enhancement layer in a subsequent pultrusion process.

The carbon fiber is placed on the creel 1 and pulled out by the guide device 2, and is put into the dipping tank 3 for dipping by the sizing agent which is the damping material manufactured above.

And the carbon fiber soaked with the damping solution passes through a preforming die 4 to form a preforming plate.

The preformed plate passes through a drying chamber 5, a blower 6 below the drying chamber 5 can remove the gasoline solvent contained in the preformed plate, and the temperature of the air is controlled at 100 ℃. The content of gasoline solvent is controlled to be less than 0.1 percent before the board is taken out of the drying chamber 5 by adjusting the blowing speed and the temperature of the blower.

The solvent-removed preformed sheet comes out of the drying chamber 5 and has a gram weight of 50g/m ² The two plain fiberglass mesh fabrics are compounded on the upper and lower surfaces of the preformed sheet by the guide roller 9. Width of glass fibre plain mesh cloth and width of preformed plateThe same is true. The side of the glass fiber plain mesh fabric facing the preformed sheet material is coated with a layer of uncured epoxy resin film in advance, and the thickness of the epoxy resin film is 200 mu m. First pair of compression roller 11 carries out preliminary laminating with glass fibre plain weave net cloth and damping panel, and the upper and lower surface of panel is bonded with epoxy to the pressure that second pair of compression roller 12 was exerted, makes damping solution and epoxy combine more closely, can get rid of the bubble that exists in the preforming panel simultaneously.

The preformed sheet passes through a forming die 13 to form the damping reinforcing plate. The heating temperature of the forming die 13 is 180 ℃, and the time of the plate in the forming die 13 is controlled to be about 5min.

The damping reinforcing plate is drawn to a cutting device 15 through a drawing machine 14 and is cut according to actual length requirements.

Arranging and stacking the cut damping reinforced plates and non-damping reinforced plates (epoxy resin is used as sizing agent) according to a certain mode according to design requirements, and inserting the reinforcing plates with the gram weight of 200g/m ² The glass fiber plain mesh cloth. Then, the epoxy resin is poured in vacuum, the temperature of the vacuum pouring is 70 ℃, and the pouring and curing time is 4 hours. And (5) completing the preparation of the prefabricated member of the blade beam cap by vacuum pouring epoxy resin and curing.

Blade

According to another embodiment of the invention, there may also be provided a blade 20 comprising the above-described blade spar cap 23. The structure of the blade 20 has already been described above with reference to fig. 1, and will not be redundantly described here.

Wind generating set

According to another embodiment of the invention, a wind power plant comprising the above-described blade may also be provided.

According to the invention, the inorganic cloth is bonded to two sides of the reinforcing layer in the damping reinforcing plate through the resin film, on one hand, the inorganic cloth is favorable for resin infusion and conduction, on the other hand, the resin component of the resin film can be chemically bonded with the viscoelastic damping rubber in the damping material by using the coupling agent, and the problem of matching between the rubber and the thermosetting resin is solved.

Although the embodiments of the present invention have been described in detail above, those skilled in the art may make various modifications and alterations to the embodiments of the present invention without departing from the spirit and scope of the present invention. It will be understood that modifications and variations may occur to those skilled in the art, which modifications and variations may be within the spirit and scope of the embodiments of the invention as defined by the appended claims. In addition, the various embodiments described above may be combined with each other without being contradictory to each other.

Claims

1. A blade spar cap wherein the blade spar cap (20) comprises a plurality of reinforcement plates (23R), said plurality of reinforcement plates (23R) comprising a damping reinforcement plate, said damping reinforcement plate comprising a reinforcement layer and a damping material.

2. The blade spar cap of claim 1, wherein the damping material is impregnated in the reinforcement layer.

3. The blade spar cap of claim 1, wherein the plurality of reinforcement plates (23R) further comprises a non-damped reinforcement plate comprising a reinforcement layer impregnated with a resin.

4. The blade spar cap of claim 3, wherein the reinforcement layers in the damped and non-damped reinforcement plates are fiberglass and/or carbon fibers.

5. The blade spar cap of claim 3, wherein the damped and non-damped reinforcement plates are arranged spaced apart in a width direction of the blade spar cap (23) and/or in a thickness direction of the blade spar cap (23).

6. The blade spar cap of any one of claims 1 to 5, wherein the damping reinforcing plate further comprises an inorganic cloth bonded to both sides of the reinforcing layer of the damping reinforcing plate through a resin film.

7. The blade spar cap of any one of claims 3 to 5, wherein the damped and undamped reinforcement plates are pultruded plates.

8. The blade spar cap of any of claims 1 to 5, wherein the blade spar cap (23) further comprises inorganic cloth interposed between adjacent reinforcement plates (23R).

9. The blade spar cap of any one of claims 1 to 5, wherein the damping material comprises a viscoelastic damping rubber and a vulcanizing agent.

10. The blade spar cap of claim 9 wherein the damping material further comprises a strengthening agent, a plasticizer, an antioxidant, and a coupling agent,

the damping material comprises 60-80 parts by weight of viscoelastic damping rubber, 10-20 parts by weight of reinforcing agent, 1-5 parts by weight of plasticizer, 5-10 parts by weight of antioxidant, 1-3 parts by weight of vulcanizing agent and 0.5-3 parts by weight of coupling agent.

11. The blade spar cap of claim 3, wherein the reinforcement layers in the damped reinforcement plates are fiberglass and the reinforcement layers in the non-damped reinforcement plates are carbon fibers.

12. A method of manufacturing a blade spar cap according to claim 1, comprising:

preparing a damping solution;

dipping the enhancement layer into a damping solution to prepare a damping enhancement plate;

and paving the damping reinforcing plate.

13. The method of manufacturing of claim 12, wherein the step of preparing the damping material comprises:

preparing raw materials, wherein the raw materials comprise 60-80 parts by weight of viscoelastic damping rubber, 10-20 parts by weight of reinforcing agent, 1-5 parts by weight of plasticizer, 5-10 parts by weight of antioxidant, 1-3 parts by weight of vulcanizing agent and 0.5-3 parts by weight of coupling agent;

preparing the raw materials into slices by using an open mill;

the flakes are dissolved in an organic solvent.

14. The manufacturing method according to claim 13, wherein the step of preparing the damping enhancing plate further comprises:

pre-forming the reinforcement layer into a sheet after dipping the reinforcement layer into the damping solution;

drying the plate to remove the organic solvent;

bonding inorganic cloth coated with thermosetting resin film on two sides of the dried board;

and forming the board after the inorganic cloth is bonded to form the damping reinforcing board.

15. The method of manufacturing according to any one of claims 12-14, wherein the blade spar cap further comprises a non-damped reinforcement plate comprising a reinforcement layer impregnated with a resin,

in the step of laying the damping reinforcing plates, the damping reinforcing plates and the non-damping reinforcing plates are laid at intervals in a width direction and/or a thickness direction of the blade spar cap.

16. The method of manufacturing according to claim 15, further comprising: inorganic cloth is interposed between adjacent reinforcing plates.

17. The manufacturing method according to claim 16, characterized by comprising: infusing resin to make a prefabricated member of the blade beam cap.

18. A blade, characterized in that the blade (20) comprises a blade spar cap (23) according to any of the claims 1-11.

19. A wind park according to claim 18, characterized in that the wind park comprises a blade (20).