Continuous felt precursor impregnating compound and impregnating device for wind power blade

Abstract

The invention relates to the technical field of glass fiber infiltration, in particular to a continuous felt precursor impregnating compound for a wind power blade and an infiltration device. The impregnating compound comprises the following components: 10%-20% of a silane coupling agent, 10%-20% of a pH regulator, 10%-15% of a lubricant, 15%-25% of a PVAC film-forming agent, 20%-25% of a polyurethane film-forming agent and 6%-10% of an antistatic agent. The infiltrating device comprises an infiltrating pipe, and a spiral first infiltrating channel is arranged outside the infiltrating pipe; an infiltration frame is arranged outside the infiltration pipe, the infiltration frame can move in the diameter direction of the infiltration pipe, a drying channel is formed in the axis direction of the infiltration pipe, and glass fibers enter a second infiltration channel after being cleaned and infiltrated through the first infiltration channel and enter the drying channel to be dried after being infiltrated and sprayed through the second infiltration channel. By adopting multiple resin systems, the effects of balancing the filling rate and achieving uniform filling are achieved, uniform infiltration of the impregnating compound can be effectively promoted, and the foaming risk in the dehumidification process of the wind-driven fan blade main beam is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of glass fiber impregnation, in particular to a continuous felt raw fiber impregnation agent and an impregnation device for wind turbine blades. Background Art

[0002] Continuous felt, as a new type of glass fiber non-woven reinforced substrate for composite materials, plays an important role in the molding of wind turbine blades. The continuous felt raw fiber impregnating agent is a key material in the continuous felt production process, which directly affects the performance of the continuous felt and the quality of the wind turbine blades. The impregnating agent usually contains a variety of effective components, such as silane coupling agents, film-forming agents, lubricants, etc. These components are formed into an impregnating agent with excellent performance through specific proportions and preparation processes. The impregnating agent in the prior art is generally a single type of silane coupling agent, which makes it easy for bubbles to appear during the impregnation of the impregnating agent, affecting the uniform coating of the impregnating agent, and also affecting the durability of the wind turbine blades.

[0003] The continuous felt yarn needs to be cleaned before impregnation to remove surface burrs, dust, etc. After cleaning, it needs to be dried to remove surface moisture to avoid affecting the coating of the impregnating agent. The process is relatively complicated.

[0004] In view of the above problems, the present application provides a continuous felt yarn impregnation agent and an impregnation device for wind turbine blades, which solve the problems of the shortcomings of the impregnation agent in the prior art and the relatively complicated impregnation process. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a continuous felt yarn impregnation agent and an impregnation device for wind turbine blades.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a continuous felt raw fiber impregnating agent for wind turbine blades, which includes the following components by weight: 10-20% of silane coupling agent, 10-20% of pH regulator, 10%-15% of lubricant, 15%-25% of PVAC film-forming agent, 20%-25% of polyurethane film-forming agent and 6%-10% of antistatic agent.

[0007] As an optimization, the silane coupling agent includes 5%-10% of an epoxy silane coupling agent and 5%-10% of an acyloxy silane coupling agent.

[0008] The infiltration device comprises an infiltration tube, the outer portion of the infiltration tube is provided with a spiral first infiltration channel, and the bottom of the first infiltration channel is evenly provided with a plurality of infiltration agent outlets; An infiltration rack is arranged outside the infiltration tube, and the infiltration rack can move along the diameter direction of the infiltration tube, and the infiltration rack includes a first infiltration part and a second infiltration part which are arranged opposite to each other, and an infiltration interval is arranged between the first infiltration part and the second infiltration part, and the first infiltration part and the second infiltration part form a discontinuous second infiltration channel, and an infiltration nozzle is arranged in the infiltration interval; A drying channel is arranged in the axial direction of the impregnation tube. The glass fiber is cleaned and impregnated in the first impregnation channel and then enters the second impregnation channel. After being impregnated and sprayed in the second impregnation channel, the glass fiber enters the drying channel for drying.

[0009] As an optimization, the infiltration tube is connected to a liquid supply tube, which is used to supply liquid to the infiltration agent outlet and the infiltration nozzle. An infiltration box is provided at the lower side of the infiltration tube, which is used to recover the infiltration agent flowing down the infiltration tube. A baffle is provided on the upper part of the infiltration box, and the baffle is located on both sides of the infiltration tube.

[0010] As an optimization, the second infiltration channel is a discontinuous spiral, and the second infiltration channel and the first infiltration channel are coaxially arranged; A telescopic rod is arranged outside the infiltration tube, the extended end of the telescopic rod is connected to the infiltration frame, and the axis of the telescopic rod is perpendicular to the tangent of the connection of the infiltration tube.

[0011] As an optimization, a first guide wheel is arranged outside the outlet end of the first infiltration channel, and the glass fiber passing through the first infiltration channel enters the second infiltration channel after being guided by the first guide wheel; A second guide wheel is disposed at the outlet end of the second infiltration channel, and the glass fiber enters the drying channel after being guided by the second guide wheel. The drying channel runs through the infiltration pipe.

[0012] As an optimization, the inner wall of the drying channel is provided with a heat insulation layer and a heating layer in sequence from the outside to the inside, and the drying channel is provided coaxially with the infiltration tube.

[0013] As an optimization, when the glass fiber is being infiltrated, the infiltration rack moves toward the infiltration tube, the glass fiber in the second infiltration channel relaxes instantly, the infiltration nozzle is used to flush the infiltration agent on the glass fiber at the infiltration interval, and the infiltration rack moves outward and resets synchronously to vibrate the glass fiber to remove excess infiltration agent.

[0014] As an optimization, the wetting agent includes 5%-10% of epoxy silane coupling agent, 5%-10% of acyloxy silane coupling agent, 10-20% of pH adjuster, 10%-15% of lubricant, 15%-25% of PVAC film former, 20%-25% of polyurethane film former and 6%-10% of antistatic agent.

[0015] The present invention provides a continuous felt yarn impregnation agent and impregnation device for wind turbine blades, which has the following advantages: The impregnating agent of the present application adopts a variety of resin systems, which has the effect of balancing the infusion rate and making the infusion uniform, and can effectively promote the uniform infiltration of the impregnating agent and effectively reduce the risk of foaming during the dehumidification process of the main beam of the wind turbine blade; The impregnation device of the present application can efficiently clean, flush and impregnate the continuous felt raw yarn, effectively remove dust and other impurities on the surface of the raw yarn, promote the efficient coating of the impregnation agent, and ensure the performance of the raw yarn; During use, the impregnation device performs preliminary impregnation and flushing of the raw silk through the first impregnation channel, further impregnation of the raw silk through the second impregnation channel, and high-pressure flushing of impurities on the surface of the raw silk through the impregnation nozzle. The raw silk is then vibrated through the impregnation frame to remove excess impregnation agent. At the same time, the efficient coating of the impregnation agent can be effectively promoted during the contact and movement of the raw silk with the first impregnation channel and the second impregnation channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the infiltration device of the present invention.

[0017] Figure 2 It is a schematic axial view of the infiltration device of the present invention.

[0018] Figure 3 It is a schematic diagram of the infiltration process path of the continuous felt raw yarn of the present invention.

[0019] Figure 4 This is an axial schematic diagram of the infiltration device of the present invention in use.

[0020] Figure 5 It is a left side schematic diagram of the infiltration device of the present invention in use state.

[0021] Figure 6 For the present invention Figure 5 Schematic diagram of the AA section structure.

[0022] Figure 7 This is a schematic front view of the infiltration device of the present invention in use.

[0023] Figure 8 This is a bottom axial schematic diagram of the infiltration device of the present invention in use.

[0024] Among them, 1. infiltration tube, 2. first infiltration channel, 3. infiltration agent outlet, 4. first infiltration part, 5. second infiltration part, 6. infiltration interval, 7. infiltration nozzle, 8. drying channel, 9. liquid supply pipe, 10. infiltration box, 11. baffle, 12. telescopic rod, 13. first guide wheel, 14. second guide wheel, 15. thermal insulation layer, 16. heating layer. DETAILED DESCRIPTION

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. Example 1

[0026] A continuous felt yarn impregnating agent for wind turbine blades comprises the following components by weight: 10% of an epoxy silane coupling agent, 8% of an acyloxy silane coupling agent, 12% of a pH value regulator, 10% of a lubricant, 25% of a PVAC film-forming agent, 25% of a polyurethane film-forming agent and 10% of an antistatic agent. Example 2

[0027] A continuous felt yarn impregnating agent for wind turbine blades comprises the following components by weight: 5% of an epoxy silane coupling agent, 10% of an acyloxy silane coupling agent, 20% of a pH value regulator, 15% of a lubricant, 20% of a PVAC film-forming agent, 20% of a polyurethane film-forming agent and 10% of an antistatic agent. Example 3

[0028] A continuous felt yarn impregnating agent for wind turbine blades comprises the following components by weight: 8% of epoxy silane coupling agent, 5% of acyloxy silane coupling agent, 25% of pH value regulator, 12% of lubricant, 15% of PVAC film-forming agent, 25% of polyurethane film-forming agent and 10% of antistatic agent.

[0029] Comparative Example 1: A continuous felt filament impregnation agent for wind turbine blades comprises the following components by weight: 18% of an acyloxysilane coupling agent, 12% of a pH value regulator, 10% of a lubricant, 25% of a PVAC film former, 25% of a polyurethane film former and 10% of an antistatic agent.

[0030] Comparative Example 2: A continuous felt yarn impregnating agent for wind turbine blades comprises the following components by weight: 20% of an epoxy silane coupling agent, 2% of an acyloxy silane coupling agent, 15% of a pH value regulator, 15% of a lubricant, 20% of a PVAC film-forming agent, 18% of a polyurethane film-forming agent and 10% of an antistatic agent.

[0031] Comparative Example 3: A continuous felt yarn impregnating agent for wind turbine blades comprises the following components by weight: 10% of an epoxy silane coupling agent, 8% of an acyloxy silane coupling agent, 12% of a pH value regulator, 10% of a lubricant, 25% of a PVAC film-forming agent, 25% of a polyurethane film-forming agent and 10% of an antistatic agent.

[0032] The continuous felt precursor obtained in Examples 1-3 and Comparative Examples 1-2 was impregnated with the impregnation device of the present application, and the continuous felt precursor obtained in Comparative Example 3 was cleaned, impregnated and dried with the existing impregnation device to obtain the impregnated continuous felt precursor. The single filament diameter of the obtained continuous felt precursor was 13-14 μm, the number of precursor bundles was 100, and the thickness of the obtained continuous felt was about 2 mm. The continuous felt was tested, and the test results are as follows: project Longitudinal breaking force (N / 75mm) Transverse breaking force (N / 75mm) Mass per unit area / (g / m2) Corrosion resistance% (3% H2O2, 3% H2SO4) High temperature resistance ℃ Example 1 132 51 332 19.7 630 Example 2 133 55 327 19.5 625 Example 3 130 50 332 19.6 630 Comparative Example 1 117 36 273 17.9 550 Comparative Example 2 122 41 282 18.2 560 Comparative Example 3 127 46 297 19.2 610 According to the above table, the continuous felt made from the continuous raw yarn of the present application has good mechanical strength and chemical properties. The performance of the continuous felt made from the continuous raw yarn of the present application is significantly lower than that of the continuous felt made from the continuous raw yarn of the present application. The continuous raw yarn made from the continuous raw yarn without the continuous raw yarn of the present application has a significantly lower performance. The continuous raw yarn made from the continuous raw yarn without the continuous raw yarn of the present application has a slightly lower performance even if the continuous raw yarn is made from the continuous raw yarn without the continuous raw yarn of the present application. The continuous raw yarn made from the continuous raw yarn without the continuous raw yarn of the present application has a slightly lower performance even if the continuous raw yarn is made from the continuous raw yarn without the continuous raw yarn of the present application.

[0033] like Figure 1-Figure 8 As shown, the infiltration device includes an infiltration tube 1, the outside of the infiltration tube 1 is provided with a spiral first infiltration channel 2, and the bottom of the first infiltration channel 2 is evenly provided with a plurality of infiltration agent outlets 3; An infiltration rack is disposed outside the infiltration tube 1, and the infiltration rack can move along the diameter direction of the infiltration tube 1. The infiltration rack includes a first infiltration portion 4 and a second infiltration portion 5 that are arranged opposite to each other. An infiltration interval 6 is disposed between the first infiltration portion 4 and the second infiltration portion 5. The first infiltration portion 4 and the second infiltration portion 5 form a discontinuous second infiltration channel. An infiltration nozzle 7 is disposed in the infiltration interval 6. A drying channel 8 is provided in the axial direction of the impregnation tube 1. The glass fiber enters the second impregnation channel after being cleaned and impregnated in the first impregnation channel 2, and enters the drying channel 8 for drying after being impregnated and sprayed in the second impregnation channel.

[0034] The first impregnation channel 2 is a continuous and smooth wire-moving channel, and the glass fiber can smoothly move along the inside of the first impregnation channel 2. The impregnation agent can be introduced into the first impregnation channel 2 through the impregnation agent outlet 3, so that the impregnation agent is evenly filled and fully wrapped around the outside of the raw silk. The continuous felt raw silk is preliminarily impregnated and cleaned inside the first impregnation channel 2, and the excess impregnation agent can take away dust and other impurities on the surface of the continuous felt raw silk, and then enter the second impregnation channel after being guided. In the second impregnation channel, the raw silk can be sprayed, squeezed and vibrated, which can effectively remove the adhered dust and excess impregnation agent and ensure the impregnation effect. After the raw silk is impregnated, it leaves the impregnation device of the present application through the drying channel 8.

[0035] like Figure 1 and Figure 2 As shown, the infiltration tube 1 is connected to a liquid supply tube 9, and the liquid supply tube 9 is used to supply liquid to the infiltration agent outlet 3 and the infiltration nozzle 7. An infiltration box 10 is arranged at the lower side of the infiltration tube 1, and the infiltration box 10 is used to recover the infiltration agent flowing down the infiltration tube 1. A baffle 11 is arranged on the upper part of the infiltration box 10, and the baffle 11 is located on both sides of the infiltration tube 1.

[0036] A liquid supply cavity is provided inside the infiltration tube 1, a liquid supply tube 9 is connected to the inside of the liquid supply cavity, the liquid supply cavity is connected to the infiltration agent outlet 3, and a plurality of infiltration agent outlets 3 are evenly distributed along the first infiltration channel 2. The infiltration agent sprayed outward by the infiltration nozzle 7 flows back to the infiltration box 10 along the baffle 11.

[0037] like Figure 1 and Figure 2 As shown, the second infiltration channel is a discontinuous spiral, and the second infiltration channel and the first infiltration channel 2 are coaxially arranged; A telescopic rod 12 is disposed outside the infiltration tube 1 , the extended end of the telescopic rod 12 is connected to the infiltration frame, and the axis of the telescopic rod 12 is perpendicular to the tangent of the connection of the infiltration tube 1 .

[0038] The telescopic rod 12 is electrically controlled, and the telescopic rod 12 repeatedly extends and retracts to drive the infiltration frame to repeatedly move along the diameter direction of the infiltration tube 1, and repeatedly relaxes and tightens the continuous felt yarn. The telescopic rods 12 of the first infiltration part 4 and the second infiltration part 5 are synchronously extended or shortened.

[0039] like Figure 6 As shown, a first guide wheel 13 is disposed outside the outlet end of the first infiltration channel 2, and the glass fiber passing through the first infiltration channel 2 is guided by the first guide wheel 13 and then enters the second infiltration channel; A second guide wheel 14 is disposed at the outlet end of the second infiltration channel. The glass fiber enters the drying channel 8 after being guided by the second guide wheel 14 . The drying channel 8 runs through the infiltration pipe 1 .

[0040] The first guide wheel 13 and the second guide wheel 14 can be unpowered wheels or powered wheels. The continuous felt yarn enters the second impregnation channel after being guided by the first guide wheel 13, and enters the drying channel 8 after being guided by the second guide wheel 14. The drying channel 8 is coaxially arranged with the impregnation tube 1, and the continuous felt yarn can also be coaxially arranged with the impregnation tube 1. A ventilation device can also be configured inside the drying channel 8 to promote the drying of the continuous felt yarn.

[0041] like Figure 6 As shown, the inner wall of the drying channel 8 is provided with a heat insulation layer 15 and a heating layer 16 in sequence from the outside to the inside, and the drying channel 8 is provided coaxially with the infiltration tube 1 .

[0042] like Figure 7 As shown, when the glass fiber is impregnated, the impregnation rack moves toward the impregnation tube 1, the glass fiber in the second impregnation channel relaxes instantly, the impregnation nozzle 7 flushes the impregnation agent to the glass fiber at the impregnation interval 6, and the impregnation rack moves outward and resets synchronously to vibrate the glass fiber to remove excess impregnation agent.

[0043] When the telescopic rod 12 is shortened, the spiral diameter of the second infiltration channel can be reduced, the continuous felt yarn in the second infiltration channel can be relaxed, and the relaxed part can be flushed through the infiltration nozzle 7; when the telescopic rod 12 is extended, the spiral diameter of the second infiltration channel can be increased, the continuous felt yarn can be tensioned, and the continuous felt yarn can be vibrated.

[0044] The wetting agent includes 5%-10% of epoxy silane coupling agent, 5%-10% of acyloxy silane coupling agent, 10-20% of pH regulator, 10%-15% of lubricant, 15%-25% of PVAC film-forming agent, 20%-25% of polyurethane film-forming agent and 6%-10% of antistatic agent.

[0045] The method of using the infiltration device is as follows: The continuous felt yarn moves spirally along the first infiltration channel 2, and the impregnating agent of the present application is introduced into the infiltration tube 1 through the liquid supply pipe 9, and is evenly distributed in the first infiltration channel 2 through the impregnating agent outlet 3, so as to efficiently impregnate the continuous felt yarn in the first infiltration channel 2 and realize preliminary cleaning; After the initial cleaning and infiltration, the continuous felt raw yarn enters the second infiltration channel after being guided by the first guide wheel 13, and moves spirally along the second infiltration channel. The moving direction of the first infiltration channel 2 is opposite to that of the second infiltration channel. Figure 3 As shown; The continuous felt yarn moves inside the second infiltration channel, and the telescopic rod 12 is repeatedly extended and retracted, driving the infiltration frame to repeatedly tighten and open, so as to achieve flushing, squeezing and shaking of the continuous felt yarn. The specific process is as follows: The telescopic rod 12 is extended, and the continuous felt yarn is kept in a tensioned state and moves forward, and the continuous felt yarn in the impregnation interval 6 is sprayed and washed by the impregnation nozzle 7 to remove impurities and dust; The telescopic rod 12 is shortened to loosen the continuous felt yarn, and the continuous felt yarn is sprayed and washed by the impregnation nozzle 7. After the continuous felt yarn is impacted, it is released and spread inside the impregnation interval 6, so that the impregnation agent is fully wrapped around the outside of the continuous felt yarn. The telescopic rod 12 is extended to open the infiltration frame quickly, and the continuous felt yarn on the infiltration frame is quickly tightened and vibrated to remove excess infiltration agent. The continuous felt yarn is continuously squeezed with the inner wall of the second infiltration channel to ensure sufficient infiltration.

[0046] After the impregnation is completed, the continuous felt yarn is guided by the second guide wheel 14 and enters the drying channel 8. The second guide wheel 14 is located at the lower part of the impregnation tube 1. After the continuous felt yarn is squeezed by the second guide wheel 14, the excess impregnation agent is further removed. The continuous felt yarn is dried in the drying channel 8, and after the drying is completed, the continuous felt yarn can enter the next process.

[0047] The above-mentioned specific embodiments are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific embodiments. Any continuous felt raw material impregnation agent and impregnation device for wind turbine blades that conform to the claims of the present invention and any appropriate changes or modifications made thereto by ordinary technicians in the corresponding technical field shall fall within the patent protection scope of the present invention.

Claims

1. A continuous felt yarn impregnating agent for wind turbine blades, characterized in that: The composition comprises the following components by weight: 10-20% of silane coupling agent, 10-20% of pH adjusting agent, 10%-15% of lubricant, 15%-25% of PVAC film-forming agent, 20%-25% of polyurethane film-forming agent and 6%-10% of antistatic agent.

2. The continuous felt yarn sizing agent for wind turbine blades according to claim 1, characterized in that: The silane coupling agent comprises 5%-10% of an epoxy silane coupling agent and 5%-10% of an acyloxy silane coupling agent.

3. An infiltration device, comprising the infiltration agent according to any one of claims 1 to 2, characterized in that: It comprises an infiltration tube (1), the outside of which is provided with a spiral first infiltration channel (2), and the bottom of the first infiltration channel (2) is evenly provided with a plurality of infiltration liquid outlets (3); An infiltration frame is arranged outside the infiltration tube (1), and the infiltration frame can move along the diameter direction of the infiltration tube (1). The infiltration frame comprises a first infiltration portion (4) and a second infiltration portion (5) arranged opposite to each other. A infiltration interval (6) is arranged between the first infiltration portion (4) and the second infiltration portion (5). The first infiltration portion (4) and the second infiltration portion (5) form a discontinuous second infiltration channel. A infiltration nozzle (7) is arranged in the infiltration interval (6); A drying channel (8) is provided in the axial direction of the impregnation tube (1); the glass fiber is cleaned and impregnated in the first impregnation channel (2) and then enters the second impregnation channel; after being impregnated and sprayed in the second impregnation channel, the glass fiber enters the drying channel (8) and is dried.

4. The infiltration device according to claim 3, characterized in that: The infiltration pipe (1) is connected to a liquid supply pipe (9), and the liquid supply pipe (9) is used to supply liquid to the infiltration liquid outlet (3) and the infiltration nozzle (7). An infiltration box (10) is arranged at the lower side of the infiltration pipe (1), and the infiltration box (10) is used to recover the infiltration liquid flowing down the infiltration pipe (1). A baffle (11) is arranged at the upper part of the infiltration box (10), and the baffle (11) is located on both sides of the infiltration pipe (1).

5. The infiltration device according to claim 3, characterized in that: The second infiltration channel is in a discontinuous spiral shape, and the second infiltration channel and the first infiltration channel (2) are coaxially arranged; A telescopic rod (12) is arranged outside the infiltration tube (1), the extended end of the telescopic rod (12) is connected to the infiltration frame, and the axis of the telescopic rod (12) is perpendicular to the tangent of the connection point of the infiltration tube (1).

6. The infiltration device according to claim 3, characterized in that: A first guide wheel (13) is arranged outside the outlet end of the first infiltration channel (2), and the glass fiber passing through the first infiltration channel (2) is guided by the first guide wheel (13) and then enters the second infiltration channel; A second guide wheel (14) is provided at the outlet end of the second impregnation channel, and the glass fiber enters the drying channel (8) after being guided by the second guide wheel (14), and the drying channel (8) runs through the impregnation pipe (1).

7. The infiltration device according to claim 3, characterized in that: The inner wall of the drying channel (8) is provided with a heat insulation layer (15) and a heating layer (16) in sequence from the outside to the inside, and the drying channel (8) is coaxially arranged with the infiltration tube (1).

8. The infiltration device according to claim 3, characterized in that: When the glass fiber is being infiltrated, the infiltration rack moves toward the infiltration tube (1), the glass fiber in the second infiltration channel relaxes instantly, the infiltration liquid is flushed on the glass fiber at the infiltration interval (6) through the infiltration nozzle (7), and the infiltration rack moves outward and resets synchronously, vibrating the glass fiber to remove excess infiltration liquid.

9. The infiltration device according to claim 3, characterized in that: The impregnation liquid includes 5%-10% of epoxy silane coupling agent, 5%-10% of acyloxy silane coupling agent, 10-20% of pH regulator, 10%-15% of lubricant, 15%-25% of PVAC film-forming agent, 20%-25% of polyurethane film-forming agent and 6%-10% of antistatic agent.

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