CN215256572U - Steel beam cap of wind driven generator blade - Google Patents
Steel beam cap of wind driven generator blade Download PDFInfo
- Publication number
- CN215256572U CN215256572U CN202120077963.7U CN202120077963U CN215256572U CN 215256572 U CN215256572 U CN 215256572U CN 202120077963 U CN202120077963 U CN 202120077963U CN 215256572 U CN215256572 U CN 215256572U
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- Prior art keywords
- steel
- beam cap
- blade
- steel beam
- glass fiber
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 132
- 239000010959 steel Substances 0.000 title claims abstract description 132
- 239000003822 epoxy resin Substances 0.000 claims abstract description 10
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 10
- 239000011152 fibreglass Substances 0.000 claims description 21
- 239000003365 glass fiber Substances 0.000 claims description 19
- 240000007182 Ochroma pyramidale Species 0.000 claims description 16
- 239000011521 glass Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 239000004576 sand Substances 0.000 abstract 3
- 239000002023 wood Substances 0.000 abstract 3
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 239000004744 fabric Substances 0.000 description 20
- 239000000463 material Substances 0.000 description 13
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 239000011162 core material Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009755 vacuum infusion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Wind Motors (AREA)
Abstract
The utility model discloses a aerogenerator blade steel beam cap, steel beam cap includes steel part, bas sand wood part, glass steel part, and wherein the steel part is located the left and right sides of steel beam cap, and bas sand wood part is located the centre of both sides steel part, and glass steel part is located the surface of steel beam cap to wrap up and connect steel part, bas sand wood part for whole. The steel part is overlapped by a plurality of layers of thin steel plates and poured by epoxy resin, so that the difficulties of high cost and complex process of forming the curved surface of the steel are solved. For traditional glass steel beam cap, the utility model provides a steel beam cap, mechanical properties is high, weight is low, with low costs, simple process to after the blade retires, steel in the steel beam cap can be retrieved and recycled, reduces wasting of resources and environmental pollution.
Description
Technical Field
The utility model relates to a wind-powered electricity generation blade's beam cap structure, concretely relates to steel beam cap of aerogenerator blade.
Background
The blade is a main part of the wind driven generator for absorbing wind energy and bears a very large operation load in the operation process, so that the main structural material of the blade needs to have higher strength and rigidity, the structural safety of the blade is guaranteed on one hand, the deformation of the blade is reduced on the other hand, and the collision of the blade and a tower barrel is avoided. In addition, since the outer shape of the blade is generally a curved shape, a convenient molding process is required for a structural material of the blade. The glass fiber reinforced plastic has high mechanical property and simple forming process, so the glass fiber reinforced plastic is a main structural material of the current large-scale wind driven generator blade.
However, the glass fiber reinforced plastic is composed of glass fiber and resin, belongs to chemical materials, and causes high cost, high energy consumption and large pollution of the glass fiber reinforced plastic, and more importantly, after the blades of the wind driven generator are eliminated, a large amount of glass fiber reinforced plastic materials cannot be treated, so that secondary pollution and secondary waste are caused. The fan blades installed in large quantities in the early period of China are close to the service life limit, and how to recycle the fan blades faces a serious challenge at present.
In addition, as the length of the blade is longer and longer, the performance of the glass fiber reinforced plastic cannot meet the structural design requirement of the blade, and the carbon fiber has excellent performance, but is very expensive and cannot be used in large quantities, and moreover, the carbon fiber also has the problem that the carbon fiber cannot be recycled. The strength and rigidity of the steel are superior to those of glass fiber reinforced plastics, the steel is low in cost and can be recycled, but the steel is complex in processing technology and high in cost when curved surface parts, particularly large curved surface parts, are manufactured.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a steel beam cap and the manufacturing step of aerogenerator blade in order to solve the difficult problem of the glass steel material mechanical properties is not enough, with high costs and material recovery among the current blade.
The utility model provides a steel beam cap of aerogenerator blade, including steel part, basha wooden part, glass steel part, the steel part is located the left and right sides of steel beam cap, basha wooden part is located the centre of both sides steel, the glass steel part is located the surface of beam cap will the steel part basha wooden part wraps up and connects for whole.
The steel part in the steel beam cap is formed by overlapping a plurality of layers of steel plates with the thickness of 0.5-1 mm and the width of 80-120 mm along the thickness direction of the beam cap, and glass fiber continuous felts with the same width as the steel plates are arranged between the adjacent steel plates, wherein the strength grade of the steel plates is not lower than 10.9.
The steel part, the balsa part and the glass fiber reinforced plastic part in the steel beam cap are in vacuum infusion by epoxy resin, so that the steel beam cap is of an integral structure; the manufacturing steps of the steel beam cap comprise:
(1) according to the shape and the operation load of the fan blade, performing mechanical analysis, determining the position and the thickness of a beam cap in the blade, and manufacturing a beam cap mold according to the bottom surface and the side surface of the steel beam cap;
(2) sequentially laying a flow guide net, an isolating film and demoulding cloth on the bottom surface and the side surface of the beam cap mould;
(3) laying glass fiber cloth, wherein the cloth width is 50-100 mm larger than the perimeter of the cross section of the beam cap, and the glass fiber cloth which exceeds the side surface of the beam cap mold is laid on a mold flange;
(4) laying steel plates with designed layers and positions along the left side and the right side of the mould, and laying a layer of glass fiber continuous felt with the same width as the steel plates when laying a layer of steel plates so as to form a steel part of the steel beam cap;
(5) paving balsa wood in the middle of the beam cap mould to form a balsa wood part of the steel beam cap;
(6) covering the steel plate part and the balsa part by using glass fiber cloth on a flange of the mould;
(7) laying a layer of demolding cloth on the surface of the glass fiber cloth, laying a spiral pipe with the same length as the beam cap on one side of the beam cap mold, laying an adhesive injection pipe with the same length as the beam cap on the other side of the beam cap mold, and sealing the beam cap, the spiral pipe and the adhesive injection pipe by using a vacuum bag;
(8) the mold is vacuumized through the spiral pipe, epoxy resin is introduced into the beam cap mold through the glue injection pipe, after the epoxy resin is soaked in all materials, the resin is heated and cured, the beam cap is molded, and then the mold is demolded, so that the steel beam cap is obtained.
The steel part in the steel beam cap is consistent with the chord-wise position of the blade web plate on the section of the blade, so that the steel beam cap and the web plate form a mouth-shaped structure which is used as a main bearing structure of the blade. The steel beam cap is installed in the blade in the following steps:
(1) glass fiber cloth is laid in a PS surface shell mould and an SS surface shell mould of the blade, and then a PS surface steel beam cap and an SS surface steel beam cap are respectively hoisted into the corresponding blade shell moulds;
(2) PVC core materials are paved on two sides of the steel beam cap;
(3) laying glass fiber cloth, demoulding cloth, an isolating film and a flow guide net in sequence, laying a vacuum bag, and sealing the vacuum bag by using a sealing rubber strip;
(4) vacuumizing, introducing epoxy resin into the blade shell mold, and heating and curing after the resin is completely soaked to obtain a PS surface shell and an SS surface shell of the blade;
(5) hoisting the front edge web plate and the rear edge web plate to the SS surface blade shell, coating structural adhesive on the SS surface edge strips of the front edge web plate and the rear edge web plate, and bonding the structural adhesive with the steel part of the steel beam cap in the SS surface shell;
(6) structural glue is coated on PS surface edge strips of the front edge web plate and the rear edge web plate and on the front edge and the rear edge of the SS surface blade shell, and the PS surface blade shell, the web plates and the SS surface blade shell are bonded to form a whole blade.
Drawings
All of the above features will be better understood from the following description taken in conjunction with the accompanying drawings, in which:
fig. 1 is a cross-sectional view of a steel beam cap 1 of the present invention, wherein 11 is a steel portion on both sides of the steel beam cap, 12 is a balsa portion, and 13 is a glass fiber reinforced plastic portion;
fig. 2 is a cross-sectional profile view of a blade of a medium wind power generator of the present invention, wherein a1 is a leading edge of the blade, a2 is a trailing edge of the blade, B1 is a pressure surface of the blade, and B2 is a suction surface of the blade, wherein a direction of a1 pointing to a2 is a chordwise direction of the cross-section of the blade;
fig. 3 is the installation schematic diagram of steel beam cap in the blade of the medium wind power generator of the present invention, wherein 1 is the steel beam cap, 2 is the PVC core material, 31 is the outside glass fiber reinforced plastic of the blade shell, 32 is the inside glass fiber reinforced plastic of the blade shell, 41 is the leading edge web, and 42 is the trailing edge web.
Detailed Description
In order to clearly understand the technical features of the present invention, the present invention will be described below with reference to the accompanying drawings.
As shown in fig. 1, a steel beam cap 1 of a wind turbine blade comprises a steel part 11, a balsa part 12 and a glass fiber reinforced plastic part 13, wherein the steel part 11 is located on the left side and the right side of the beam cap 1, the balsa part 12 is located in the middle of the steel part 11 on the left side and the right side, and the glass fiber reinforced plastic part 13 is located on the outer surface of the beam cap 1 to wrap the steel part 11 and the balsa part 12. The steel part 11, the balsa part 12 and the glass fiber reinforced plastic part 13 are connected into an integral steel beam cap 1 by means of epoxy resin vacuum infusion and high-temperature curing.
As shown in fig. 3, the mounting position of the steel beam cap 1 in the blade, and the positions of the steel sections 11 on both sides in the steel beam cap 1 are respectively consistent with the chordwise positions of the leading edge web 41 and the trailing edge web 42 in the blade, so that the steel beam cap 1 in the blade shell, the leading edge web 41 and the trailing edge web 42 form a "mouth" structure as the main bearing structure of the blade;
the strength grade of a steel part 11 in the steel beam cap 1 is not lower than 10.9, the steel beam cap is formed by overlapping a plurality of layers of steel plates with the thickness of 0.5-1 mm and the width of 80-120 mm along the thickness direction of the steel beam cap 1, and a glass fiber continuous felt with the same width as the steel plates is placed between the adjacent steel plates, so that resin is conveniently injected.
At present, the modulus of the unidirectional glass fiber reinforced plastic used in the glass fiber reinforced plastic beam cap of the blade is 40GPa, the tensile strength is 800MPa, the density is 2000kg/m for carrying out the cultivation, and the price is usually 30-40 yuan/kg, while the modulus of the 10.9-grade steel is 210GPa, the tensile strength is 940MPa, the density is 7850kg/m for carrying out the cultivation, and the price is 10-20 yuan/kg. With the longer and longer blade length, the modulus of the material used for blade design becomes the limiting factor, so the performance of the unidirectional glass fiber reinforced plastic can not meet the requirement. The modulus provided by the same weight of steel is 1.34 times that of the unidirectional glass fiber reinforced plastic, so that the steel is suitable for being used as a structural material of the blade in view of the mechanical property of the material.
The beam cap is a main bearing structure in the wind driven generator blade, the weight of the beam cap accounts for about 30% of the total weight of the blade, the curvature of the curved surface of the position of the beam cap in the blade is small, therefore, a plurality of layers of thin steel plates can be stacked, the thin steel plates are isolated by a glass fiber continuous felt, the plurality of layers of thin steel plates are connected after resin soaking and curing, and then the steel with the curved surface shape is formed, so that the difficulty of curved surface forming of the steel is solved, and the steel is applied to the beam cap of the wind driven generator blade.
Taking a certain 1.5MW FRP blade as an example, the total weight of the blade is about 6 tons, the weight of the FRP cap is 1.8 tons, and if the FRP cap is replaced by a steel beam cap, the weight of the steel beam cap is only 1.2 tons, so the total weight of the blade can be reduced by 10 percent, and the material cost of the blade can be reduced by 15 to 25 percent. The manufacturing steps of the steel structure beam cap comprise:
(1) according to the shape and the operation load of the fan blade, performing mechanical analysis, determining the position and the thickness of a beam cap in the blade, and manufacturing a beam cap mold according to the bottom surface and the side surface of the steel beam cap;
(2) sequentially laying a flow guide net, an isolating film and demoulding cloth on the bottom surface and the side surface of the beam cap mould;
(3) laying glass fiber cloth, wherein the cloth width is 50-100 mm larger than the perimeter of the cross section of the beam cap, and the glass fiber cloth which exceeds the side surface of the beam cap mold is laid on a mold flange;
(4) laying steel plates with designed layers and positions along the left side and the right side of the mould, and laying a layer of glass fiber continuous felt with the same width as the steel plates when laying a layer of steel plates so as to form a steel part of the steel beam cap;
(5) paving balsa wood in the middle of the beam cap mould to form a balsa wood part of the steel beam cap;
(6) covering the steel plate part and the balsa part by using glass fiber cloth on a flange of the mould;
(7) laying a layer of demolding cloth on the surface of the glass fiber cloth, laying a spiral pipe with the same length as the beam cap on one side of the beam cap mold, laying an adhesive injection pipe with the same length as the beam cap on the other side of the beam cap mold, and sealing the beam cap, the spiral pipe and the adhesive injection pipe by using a vacuum bag;
(8) the mold is vacuumized through the spiral pipe, epoxy resin is introduced into the beam cap mold through the glue injection pipe, after the epoxy resin is soaked in all materials, the resin is heated and cured, the beam cap is molded, and then the mold is demolded, so that the steel beam cap is obtained.
The position of the steel part in the beam cap structure is consistent with the position of the web plate in the wind driven generator blade, so that the steel beam cap and the web plate form a mouth-shaped structure which is used as a main bearing structure of the blade. The steel beam cap is installed in the blade in the following steps:
(1) glass fiber cloth is laid in a PS surface shell mould and an SS surface shell mould of the blade, and then a PS surface steel beam cap and an SS surface steel beam cap are respectively hoisted into the corresponding blade shell moulds;
(2) PVC core materials are paved on two sides of the steel beam cap;
(3) laying glass fiber cloth, demoulding cloth, an isolating film and a flow guide net in sequence, laying a vacuum bag, and sealing the vacuum bag by using a sealing rubber strip;
(4) vacuumizing, introducing epoxy resin into the blade shell mold, and heating and curing after the resin is completely soaked to obtain a PS surface shell and an SS surface shell of the blade;
(5) hoisting the front edge web plate and the rear edge web plate to the SS surface blade shell, coating structural adhesive on the SS surface edge strips of the front edge web plate and the rear edge web plate, and bonding the structural adhesive with the steel part of the steel beam cap in the SS surface shell;
(6) structural glue is coated on PS surface edge strips of the front edge web plate and the rear edge web plate and on the front edge and the rear edge of the SS surface blade shell, and the PS surface blade shell, the web plates and the SS surface blade shell are bonded to form a whole blade.
Claims (4)
1. The steel beam cap of the wind driven generator blade is characterized by comprising a steel part, a balsa wood part and a glass fiber reinforced plastic part, wherein the steel part is positioned on the left side and the right side of the steel beam cap, the balsa wood part is positioned in the middle of the steel parts on the two sides, the glass fiber reinforced plastic part is positioned on the outer surface of the steel beam cap, and the steel part and the balsa wood part are wrapped and connected into a whole.
2. The steel beam cap as defined in claim 1, wherein the steel section is formed by overlapping a plurality of layers of steel plates with a thickness of 0.5-1 mm and a width of 80-120 mm in the thickness direction of the steel beam cap, and a glass fiber continuous felt with the same width as the steel plates is placed between the adjacent steel plates.
3. The steel beam cap of claim 1, wherein the steel portion, the balsa portion, and the glass fiber reinforced plastic portion are vacuum-infused with epoxy resin to form an integral structure.
4. The steel beam cap of claim 1, wherein the steel portion of the steel beam cap coincides with the chordwise position of the blade web on the blade section, and the steel beam cap and the web form a "mouth" structure which is the main load-bearing structure of the blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120077963.7U CN215256572U (en) | 2021-01-13 | 2021-01-13 | Steel beam cap of wind driven generator blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120077963.7U CN215256572U (en) | 2021-01-13 | 2021-01-13 | Steel beam cap of wind driven generator blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215256572U true CN215256572U (en) | 2021-12-21 |
Family
ID=79498273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120077963.7U Expired - Fee Related CN215256572U (en) | 2021-01-13 | 2021-01-13 | Steel beam cap of wind driven generator blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215256572U (en) |
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2021
- 2021-01-13 CN CN202120077963.7U patent/CN215256572U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211221 |
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| CF01 | Termination of patent right due to non-payment of annual fee |