CN113533011B - Sample piece for testing wind power blade connecting structure and manufacturing process thereof - Google Patents
Sample piece for testing wind power blade connecting structure and manufacturing process thereof Download PDFInfo
- Publication number
- CN113533011B CN113533011B CN202111095099.4A CN202111095099A CN113533011B CN 113533011 B CN113533011 B CN 113533011B CN 202111095099 A CN202111095099 A CN 202111095099A CN 113533011 B CN113533011 B CN 113533011B
- Authority
- CN
- China
- Prior art keywords
- laying
- test piece
- layer
- mold
- testing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/082—Blades, e.g. for helicopters
- B29L2031/085—Wind turbine blades
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to the technical field of wind power generation, in particular to a sample piece for testing a wind power blade connecting structure and a manufacturing process thereof, wherein the sample piece comprises a first scale test piece and a second scale test piece; first profile and the second profile of matching are equipped with relatively on first scale test piece and the second scale test piece, all be equipped with perpendicular connecting portion and buckle connecting portion on first profile and the second profile, the clamp splice has been placed to perpendicular connecting portion, one side that is located first scale test piece and second scale test piece and keeps away from perpendicular connecting portion is equipped with first cushion and the second cushion that is on a parallel with perpendicular connecting portion, first cushion and second cushion pass through the fastener and press from both sides tight first scale test piece and the second scale test piece. According to the invention, the first scaling test piece and the second scaling test piece are adopted, so that the reliability of the connection mode is conveniently verified in the frequent test of the connection mode in the initial verification stage, and the manufacturing material cost and the time cost of a sample used for testing are reduced.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a sample piece for testing a wind power blade connecting structure and a manufacturing process thereof.
Background
The wind power blade is one of important components for converting wind energy into mechanical energy, the blade accounts for 20-25% of the total equipment cost of the wind generating set, and the cost (including manufacturing cost, transportation cost, installation cost and maintenance cost) of the wind generating set is greatly increased along with the continuous increase of the power of the wind generating set in recent years, so that the development prospect of a large wind generating set is restricted.
In order to solve the problems, fan blades are manufactured in a segmented mode in the prior art, the segmented blades are assembled into complete blades in a bolt connection mode, a structural adhesive connection mode or a combined connection mode, however, the connection mode involves frequent tests in an initial verification stage, and a large number of manufacturing molds and models are high in cost.
In view of the above problems, the inventor of the present invention actively makes research and innovation based on the practical experience and professional knowledge that are abundant for many years in the engineering application of such products, in order to create a sample for testing the wind turbine blade connection structure and a manufacturing process thereof, so that the sample has higher practicability.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the sample piece for testing the wind power blade connecting structure and the manufacturing process thereof are provided, so that the reliability of the connecting mode is conveniently verified in the frequent test of the connecting mode in the initial verification stage, and the manufacturing material cost and the time cost of the sample piece for testing are reduced.
In order to achieve the purpose, the invention adopts the technical scheme that: a sample piece for testing a wind power blade connecting structure comprises a first scale test piece and a second scale test piece;
first scale test piece with be equipped with the first profile and the second profile of matching relatively on the second scale test piece, first profile with all be equipped with perpendicular connecting portion and buckle connecting portion on the second profile, the clamp splice has been placed to perpendicular connecting portion, is located first scale test piece and second scale test piece are kept away from one side of perpendicular connecting portion is equipped with and is on a parallel with the first cushion and the second cushion of perpendicular connecting portion, first cushion with the second cushion passes through the fastener and presss from both sides tightly first scale test piece with the second scale test piece.
Further, the first profile is located on the right side of the first scale test piece, the second profile is located on the left side of the second scale test piece, and the bending connecting portion of the first profile is embedded into the bending connecting portion of the second profile.
Furthermore, an arc-shaped bulge is arranged at the right corner of the second scaling test piece close to the bending connecting part.
Furthermore, the vertical connecting part and the bending connecting part adopt arc transition, and the bending connecting part adopts a connecting form of structural adhesive bonding/adhesive-free bonding/adhesive-lacking bonding/reinforcing mode.
The invention also provides a manufacturing process of the sample piece for testing the wind power blade connecting structure, which is used for manufacturing the sample piece for testing the wind power blade connecting structure, and the manufacturing process comprises the following steps:
the method comprises the following steps: laying and pouring system arrangement is carried out on the prefabricated mould based on the appearance structures of the first scale test piece and the second scale test piece;
step two: after the arrangement of the layering and filling systems is finished, vacuumizing and maintaining pressure;
step three: after checking that the vacuum pump and the pipeline are normal, starting to fill;
step four: closing the valve after the completion of the pouring, opening the mold and heating for curing after checking that no air leakage exists;
step five: after the solidification is finished, removing the heating device, and demolding after the cooling to the room temperature is finished;
step six: deburring the demolded product, and sampling to test the Tg value;
step seven: when the Tg value meets the requirement, cutting the product, and calibrating and punching on a first scaling test piece and a second scaling test piece which are cut;
step eight: assembling a plurality of groups of manufactured first scale test pieces and second scale test pieces by adopting bolts and different bonding configurations;
step nine: and heating and curing the assembled sample piece to finish the final test of the sample piece.
Further, the using process of the prefabricated mold in the first step comprises the following steps:
fixing a second die on the die platform in a bonding or welding manner;
laying a layer below the mold of the first scale test piece on the left side of the second mold, and connecting the first mold with the second mold after the material is laid.
Further, in the step one, the laying and pouring system arrangement process of the first scaling test piece comprises the following steps:
1) uniformly coating a release agent on one surface of the mold;
2) laying a layer of demoulding cloth 30mm above the edges of the two moulds;
3) laying a bottom paving layer along the edge of the second mold, and fixing the bottom paving layer by using spray glue after positioning;
4) laying a right-side laying layer along the edge of the second mold, and laying the right-side laying layer on a mold platform;
5) laying 1 layer of VAP film on the right side of the paving layer, wherein the white side faces downwards, and then laying a layer of flow guide net on the VAP film;
6) pressing the first die on the VAP film exhaust bag, and fixing the first die on the second die by using bolts;
7) turning up the right side paving layer and the VAP film along the corner of the first mould, paving the right side paving layer and the VAP film on the vertical surface of the first mould, and using spray glue for auxiliary fixation;
8) laying a proper amount of yarns at the corner between the right-side ply and the bottom ply;
9) sequentially laying a middle layer, a facade layer and a top layer;
10) paving demoulding cloth and a flow guide net after all layers are laid;
11) and an adhesive injection pipe and an adhesive injection port are arranged on the flow guide net on the bottom surface part, and an exhaust pipe is arranged at the air exhaust port of the VAP film exhaust bag.
Further, in the step one, the laying and pouring system arrangement process of the second scaling test piece is carried out;
1) uniformly coating a release agent on the surfaces of the two molds;
2) laying a layer of demoulding cloth 100mm beyond the edges of the two moulds;
3) laying a bottom layer along the top edge of the second vertical surface of the mould, smoothing the layer, compacting the corners, and fixing by spraying glue;
4) laying corner laying layers along the corner vertical face of the edge of the bottom of the second mold, wherein each staggered layer is 10mm, and fixing the staggered layers by using spray glue after positioning;
5) laying a middle layer according to the mode of the step 3;
6) paving a vertical face paving layer along the two vertical faces of the mould on the middle paving layer, wherein the paving layer is to be adhered to the corner;
7) laying a top layer according to the mode of the step 3;
8) after all layers are laid, laying demolding cloth and a flow guide net, wherein the demolding cloth covers the surfaces of all the layers in the product area;
9) and a glue injection pipe, a glue injection port and a demoulding cloth air exhaust system are arranged on the flow guide net on the bottom surface part.
Further, in the fourth step, the heating of the mold is divided into two stages:
the first stage is as follows: heating at 45 ℃ for 3 hours, and observing the exothermic peak time of the resin;
and a second stage: after the exothermic peak is over, the heating temperature is adjusted to 75 ℃, and the temperature is kept for 8 hours.
Further, the different bonding configurations in the step eight are structural adhesive bonding/adhesive-free bonding/adhesive-lacking bonding/reinforcing modes.
The invention has the beneficial effects that: according to the invention, the first scaling test piece and the second scaling test piece are adopted, so that the reliability of the connection mode is conveniently verified in the frequent test of the connection mode in the initial verification stage, and the manufacturing material cost and the time cost of a sample used for testing are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a sample used for testing a wind turbine blade connection structure in an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a first scaling test piece according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a second scaling test piece according to an embodiment of the present invention;
FIG. 4 is a flow chart of a manufacturing process of a sample used for testing a wind turbine blade connection structure in the embodiment of the present invention;
FIG. 5 is a diagram illustrating the relationship between the first mold and the second mold in an embodiment of the present invention;
FIG. 6 is a schematic illustration of a layup of a first scaled test piece in an embodiment of the present disclosure;
FIG. 7 is a schematic illustration of a layup of a second scaled test piece in an embodiment of the present invention;
FIG. 8 is a schematic view of the placement of the perfusion system in an embodiment of the present invention;
FIG. 9 is a schematic view of a connection relationship between the bending connection portions according to the third embodiment of the present invention;
FIG. 10 is a schematic view illustrating a connection relationship between the bending connection portions according to the fourth embodiment of the present invention;
fig. 11 is a schematic view of a connection relationship of the bending connection portion in the fifth embodiment of the present invention.
Reference numerals: 1. a first scaling test piece; a. a vertical connecting portion; b. bending the connecting part; 1A, laying layers at the bottom; 2A, laying layers on the right side; 3A, laying layers in the middle; 4A, vertical surface layering; 5A, top layering; 2. a second scaling test piece; c. an arc-shaped bulge; 1B, laying layers at the bottom; 2B, corner layering; 3B, laying layers in the middle; 4B, vertical surface layering; 5B, top layering; 3. a clamping block; 4. a first cushion block; 5. a second cushion block; 6. a fastener; 7. a first mould; 8. a second die; 9. a VAP film exhaust bag; 10. a flow guide net; 11. a glue injection port; 12. a mold platform; 13. drawing of patterns cloth air exhaust system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example one
As shown in fig. 1 to 3, the sample piece for testing the wind turbine blade connection structure comprises a first scale test piece 1 and a second scale test piece 2;
first profile and the second profile that is equipped with the matching on first scale test piece 1 and the second scale test piece 2 relatively, all be equipped with perpendicular connecting portion a and buckle connecting portion b on first profile and the second profile, clamp splice 3 has been placed to perpendicular connecting portion a, one side that is located first scale test piece 1 and the second scale test piece 2 and keeps away from perpendicular connecting portion a is equipped with first cushion 4 and the second cushion 5 that is on a parallel with perpendicular connecting portion a, first cushion 4 and second cushion 5 press from both sides tight first scale test piece 1 and the second scale test piece 2 through fastener 6.
In the preferred embodiment of the invention, the first scaling test piece 1 and the second scaling test piece 2 are adopted, so that the reliability of the connection mode is conveniently verified in the frequent test of the connection mode in the initial verification stage, and the manufacturing material cost and the time cost of a sample piece used for testing are reduced.
In the preferred embodiment of the invention, the first molded surface is positioned on the right side of the first scaling test piece 1, the second molded surface is positioned on the left side of the second scaling test piece 2, the bending connecting part b of the first molded surface is embedded into the bending connecting part b of the second molded surface, and the reliability of the connection of the first scaling test piece 1 and the second scaling test piece 2 is ensured and the load bearing capacity of the sample piece during testing is improved through the L-shaped connecting structure formed by the vertical connecting part a and the bending connecting part b of the first molded surface and the second molded surface.
As the optimization of above-mentioned embodiment, be close to the second scaling test piece 2 right side corner of bending connecting portion b and be equipped with the protruding c of arc, the setting of the protruding c of arc has guaranteed the uniformity of second scaling test piece 2 in the thickness of corner to the self intensity of second scaling test piece 2 has been guaranteed.
On the basis of the above embodiment, the vertical connecting part a and the bending connecting part b adopt arc transition, and the bending connecting part b adopts a connecting form of structural adhesive bonding.
The implementation process of structural adhesive bonding comprises the following steps: the method comprises the steps of scraping and coating structural adhesive on the right side bonding surface of a first shrinkage test piece 1, locking parts in a sample piece by using a torque wrench bolt according to the torque of 87 Nm, extruding the bonding surface along each gap by using the structural adhesive in the bolt locking process, collecting the extruded structural adhesive by using a blade, winding the outer surface of a bonding area by using textured paper or an adhesive tape, and finally putting the bonding area into an oven for heating and curing, wherein the curing temperature is set to 65 ℃, and the heating time is 4 hours.
Example two
As shown in fig. 4 to 8, the invention also provides a manufacturing process of a sample piece for testing the wind power blade connection structure, which is used for manufacturing the sample piece for testing the wind power blade connection structure, and the manufacturing process comprises the following steps:
the method comprises the following steps: laying and pouring system arrangement is carried out on the prefabricated mould based on the appearance structures of the first scale test piece 1 and the second scale test piece 2; the prefabricated mould is used for restricting the forming of the first molded surface and the second molded surface, thereby ensuring the assembling precision of the first molded surface and the second molded surface.
Step two: after the laying and filling system is arranged, the first scaling test piece 1 and the second scaling test piece 2 are coated in a double-layer vacuum mode, and the vacuum pumping and pressure maintaining are carried out, wherein the pressure loss is less than 1KPa/15 min;
step three: after checking that a vacuum pump and a pipeline are normal, respectively filling 3kg and 4kg of filling resin into a first scaling test piece 1 and a second scaling test piece 2;
step four: closing the valve after the completion of the pouring, opening the mold and heating for curing after checking that no air leakage exists;
step five: after the solidification is finished, removing the heating device, and demolding after the cooling to the room temperature is finished;
step six: deburring the demolded product, and sampling to test the Tg value;
step seven: when the Tg value meets the requirement, namely the Tg of the glass fiber reinforced plastic is more than or equal to 65, cutting the product, and calibrating and punching the cut first and second shrinkage test pieces 1 and 2;
step eight: assembling a plurality of groups of manufactured first scaling test pieces 1 and second scaling test pieces 2 by adopting bolts and different bonding configurations;
step nine: and heating and curing the assembled sample piece to finish the final test of the sample piece.
In a preferred embodiment of the present invention, the using process of the prefabricated mold in the first step includes:
fixing the second die 8 on the die platform 12 in an adhesion or welding manner;
paving a layer below the first mold 7 of the first shrinkage test piece 1 on the left side of the second mold 8, and connecting the first mold 7 with the second mold 8 after the material is paved.
Three principles should be followed for the manufacture of the first and second dies 7 and 8: the cost is low, the period is low, and the requirements on the precision of materials and the precision of a processed surface are not high; the molded surface attached to the test piece is required to meet the product tolerance, and the positioning and assembly among the dies are good; the length of the die is 1m, and the die height is 1cm redundancy.
On the basis of the above embodiment, specifically, in the first step, the laying and pouring system arrangement process of the first scaled test piece 1:
1) uniformly coating a release agent on the surface of the first mold 7 for 3 times, and paying attention to avoiding the position of a sticky sealing rubber strip when the release agent is applied;
2) laying a layer of demoulding cloth 30mm beyond the edge of the second mould 8 (the demoulding cloth is folded on the upper surface of the second mould 8 by about 20 mm), wherein the length of the demoulding cloth is 300mm, and the width of the demoulding cloth is 50mm beyond the edge of the mould;
3) laying a bottom paving layer 1A along the edge of the second mold 8, wherein staggered layers are as follows: 17mm and 25mm, and fixing by spraying glue after positioning;
4) laying a right-side laying layer 2A along the edge of the second mold 8, and laying the right-side laying layer on the mold platform 12;
5) laying 1 layer of VAP film on the right side laying layer 2A, enabling the white surface to face downwards, then laying a layer of flow guide net 10 on the VAP film, and finally arranging other parts such as a vacuum bag film exhaust opening and the like according to the form of a VAP film exhaust bag, wherein the structure is smooth without folds when the exhaust bag is arranged, and the length and width of the exhaust bag exceed the laying layers by 30-50 mm;
6) pressing the first die 7 on the VAP film exhaust bag, and fixing the first die 8 on the second die by using bolts;
7) turning up the right side laying layer 2A together with the VAP film along the corner of the first mould 7, laying the right side laying layer and the VAP film on the vertical surface of the first mould 7, and using spray glue for auxiliary fixation;
8) a proper amount of yarns are laid at a corner between the right-side layer 2A and the bottom layer 1A, so that a fillet filling gap is manufactured at the corner, the subsequent layer laying is facilitated, and the wrinkle defect at the corner is prevented;
9) then, a middle layer 3A, a facade layer 4A and a top layer 5A are laid in sequence;
10) after all layers are laid, laying demolding cloth and a flow guide net 10, wherein the demolding cloth covers the surfaces of all the layers in the product area, the flow guide net 10 is 10mm away from the edge of the vertical surface, 50mm away from the bottom surface layer, and the width in the width direction is 30-50mm away from the edge of the layer;
11) according to the schematic position in fig. 8, a glue injection pipe and a glue injection port 11 are arranged on the flow guide net 10 on the bottom surface part, and an air exhaust pipe is arranged at the air exhaust port of the VAP film air exhaust bag 9.
On the basis of the above embodiment, specifically, in the first step, the laying and pouring system arrangement process of the second scaling test piece 2;
1) uniformly coating a release agent on the surface of the second mold 8 for 3 times, and paying attention to avoiding the position of the adhesive sealing rubber strip when the release agent is applied;
2) laying a layer of demoulding cloth 100mm beyond the edge of the second mould 8, wherein the length of the demoulding cloth is 500mm, and the width of the demoulding cloth is 50mm beyond the edge of the second mould 8;
3) laying a bottom laying layer 1B along the top edge of the vertical surface of the second mold 8, smoothing the laying layer, compacting the corners, and fixing by using spray glue;
4) laying corner laying layers 2B along the corner vertical faces of the bottom edge of the second mold 8, staggering each layer by 10mm, and fixing by using glue after positioning;
5) paving a middle paving layer 3B according to the mode of the step 3;
6) paving a vertical surface paving layer 4B on the middle paving layer 3B along the vertical surface of the second mold 8, wherein the paving layer is to be applied to the corner, and filling a proper amount of yarns in gaps;
7) laying a top layer 5B according to the mode of the step 3;
8) after all layers are laid, laying demolding cloth and a flow guide net 10, wherein the demolding cloth covers the surfaces of all the layers in the product area, the flow guide net 10 is 10mm away from the edge of the vertical surface, 50mm away from the bottom surface layer, and the width in the width direction is 30-50mm away from the edge of the layer;
9) according to the schematic position in fig. 8, a glue injection pipe and a glue injection port 11 and a demoulding cloth air exhaust system 13 are arranged on the guide net 10 on the bottom surface part.
As a preference of the above embodiment, specifically, in the fourth step, the mold heating is divided into two stages:
the first stage is as follows: heating at 45 ℃ for 3 hours, and observing the exothermic peak time of the resin;
and a second stage: after the exothermic peak is over, the heating temperature is adjusted to 75 ℃, and the temperature is kept for 8 hours.
In the preferred embodiment of the present invention, the different bonding configurations in step eight are structural adhesive bonding/adhesive-free bonding/adhesive-lacking bonding/reinforcing modes.
EXAMPLE III
As shown in fig. 9, the vertical connecting part a and the bent connecting part b adopt arc transition, and the bent connecting part b adopts a connection form without adhesive bonding. The implementation process of the glue-free bonding comprises the following steps: and directly locking the parts by using a torque wrench bolt according to the torque of 87 Nm.
Example four
In the first embodiment, as shown in fig. 10, the vertical connecting portion a and the bent connecting portion b are in arc transition, and the bent connecting portion b is in a connection form of adhesive bonding.
The implementation process of the adhesive-lacking bonding comprises the following steps: compared with structural adhesive bonding, an additional structural adhesive area is needed to be adhered with a layer of pattern beautifying paper.
EXAMPLE five
In the first embodiment, as shown in fig. 11, the vertical connecting portion a and the bent connecting portion b are in arc transition, and the bent connecting portion b is in a connection form of a reinforcement mode.
And on the basis of structural adhesive bonding, hand pasting reinforcement of two layers of biaxial cloth is carried out at the outer side seam of the first shrinkage test piece 1.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A sample piece for testing a wind power blade connecting structure is characterized by comprising a first scale testing piece (1) and a second scale testing piece (2);
the first scale test piece (1) and the second scale test piece (2) are provided with a first profile and a second profile which are matched with each other, the first profile and the second profile are provided with a vertical connecting part (a) and a bending connecting part (b), a clamping block (3) is placed on the vertical connecting part (a), a first cushion block (4) and a second cushion block (5) which are parallel to the vertical connecting part (a) are arranged on one sides, far away from the vertical connecting part (a), of the first scale test piece (1) and the second scale test piece (2), and the first cushion block (4) and the second cushion block (5) clamp the first scale test piece (1) and the second scale test piece (2) through fasteners (6);
the first profile is located on the right side of the first scale test piece (1), the second profile is located on the left side of the second scale test piece (2), and the bending connecting part (b) of the first profile is embedded into the bending connecting part (b) of the second profile.
2. The sample piece for testing the connection structure of the wind power blade as claimed in claim 1, wherein an arc-shaped protrusion (c) is provided at the right corner of the second scaling test piece (2) close to the bent connection part (b).
3. The sample piece for testing the wind power blade connection structure according to claim 2, wherein the vertical connection portion (a) and the bending connection portion (b) adopt arc transition, and the bending connection portion (b) adopts a connection form of structural adhesive bonding/adhesive-free bonding/adhesive-lacking bonding/reinforcement mode.
4. A manufacturing process of a sample piece for testing a wind power blade connecting structure, which is used for manufacturing the sample piece for testing the wind power blade connecting structure according to any one of claims 1 to 3, and is characterized in that the manufacturing process of the sample piece comprises the following steps:
the method comprises the following steps: based on the appearance structures of the first scaling test piece (1) and the second scaling test piece (2), laying and pouring system arrangement is carried out on the prefabricated mould;
step two: after the arrangement of the layering and filling systems is finished, vacuumizing and maintaining pressure;
step three: after checking that the vacuum pump and the pipeline are normal, starting to fill;
step four: closing the valve after the completion of the pouring, opening the mold and heating for curing after checking that no air leakage exists;
step five: after the solidification is finished, removing the heating device, and demolding after the cooling to the room temperature is finished;
step six: deburring the demolded product, and sampling to test the Tg value;
step seven: when the Tg value meets the requirement, cutting the product, and calibrating and punching on a first scaling test piece (1) and a second scaling test piece (2) which are cut;
step eight: assembling a plurality of groups of manufactured first scaling test pieces (1) and second scaling test pieces (2) by adopting bolts and different bonding configurations;
step nine: and heating and curing the assembled sample piece to finish the final test of the sample piece.
5. The manufacturing process of the sample piece for testing the wind power blade connecting structure according to claim 4, wherein the first step of prefabricating the mold comprises a first mold (7) and a second mold (8), and the using process of the first mold (7) and the second mold (8) comprises the following steps:
fixing the second die (8) on the die platform (12) in a bonding or welding manner;
paving a layer below the first mold (7) of the first shrinkage test piece (1) on the left side of the second mold (8), and connecting the first mold (7) with the second mold (8) after the material is paved.
6. The manufacturing process of the sample piece for testing the wind power blade connecting structure according to claim 4, wherein in the step one, the laying and pouring system arrangement process of the first scaling test piece comprises the following steps:
1) uniformly coating a release agent on one surface of the mold;
2) laying a layer of demoulding cloth 30mm above the edges of the two moulds;
3) laying a bottom paving layer along the edge of the second mold, and fixing the bottom paving layer by using spray glue after positioning;
4) laying a right-side laying layer along the edge of the second mold, and laying the right-side laying layer on a mold platform;
5) laying 1 layer of VAP film on the right side of the paving layer, wherein the white side faces downwards, and then laying a layer of flow guide net on the VAP film;
6) pressing the first die on the VAP film exhaust bag, and fixing the first die on the second die by using bolts;
7) turning up the right side paving layer and the VAP film along the corner of the first mould, paving the right side paving layer and the VAP film on the vertical surface of the first mould, and using spray glue for auxiliary fixation;
8) laying a proper amount of yarns at the corner between the right-side ply and the bottom ply;
9) sequentially laying a middle layer, a facade layer and a top layer;
10) paving demoulding cloth and a flow guide net after all layers are laid;
11) and an adhesive injection pipe and an adhesive injection port are arranged on the flow guide net on the bottom surface part, and an exhaust pipe is arranged at the air exhaust port of the VAP film exhaust bag.
7. The manufacturing process of the sample piece for testing the wind power blade connecting structure according to claim 4, wherein in the first step, the laying and pouring system arrangement process of the second scaling test piece is carried out;
1) uniformly coating a release agent on the surfaces of the two molds;
2) laying a layer of demoulding cloth 100mm beyond the edges of the two moulds;
3) laying a bottom layer along the top edge of the second vertical surface of the mould, smoothing the layer, compacting the corners, and fixing by spraying glue;
4) laying corner laying layers along the corner vertical face of the edge of the bottom of the second mold, wherein each staggered layer is 10mm, and fixing the staggered layers by using spray glue after positioning;
5) laying a middle layer according to the mode of the step 3;
6) paving a vertical face paving layer along the two vertical faces of the mould on the middle paving layer, wherein the paving layer is to be adhered to the corner;
7) laying a top layer according to the mode of the step 3;
8) after all layers are laid, laying demolding cloth and a flow guide net, wherein the demolding cloth covers the surfaces of all the layers in the product area;
9) and a glue injection pipe, a glue injection port and a demoulding cloth air exhaust system are arranged on the flow guide net on the bottom surface part.
8. The manufacturing process of the sample piece for testing the wind power blade connecting structure according to claim 4, wherein in the fourth step, the mold heating is divided into two stages:
the first stage is as follows: heating at 45 ℃ for 3 hours, and observing the exothermic peak time of the resin;
and a second stage: after the exothermic peak is over, the heating temperature is adjusted to 75 ℃, and the temperature is kept for 8 hours.
9. The manufacturing process of the sample piece for testing the wind power blade connecting structure according to claim 4, wherein the different bonding configurations in the step eight are structural adhesive bonding/adhesive-free bonding/adhesive-lacking bonding/reinforcing modes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111095099.4A CN113533011B (en) | 2021-09-17 | 2021-09-17 | Sample piece for testing wind power blade connecting structure and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111095099.4A CN113533011B (en) | 2021-09-17 | 2021-09-17 | Sample piece for testing wind power blade connecting structure and manufacturing process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113533011A CN113533011A (en) | 2021-10-22 |
| CN113533011B true CN113533011B (en) | 2021-11-26 |
Family
ID=78093407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111095099.4A Active CN113533011B (en) | 2021-09-17 | 2021-09-17 | Sample piece for testing wind power blade connecting structure and manufacturing process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113533011B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661252B (en) * | 2012-05-18 | 2014-01-29 | 连云港中复连众复合材料集团有限公司 | Segmented fan blade as well as preparation and assembly method of segmented fan blade |
| CN103240878B (en) * | 2013-05-17 | 2016-07-06 | 国电联合动力技术(连云港)有限公司 | Connecting method of sectional type blade mould |
| CN104110352B (en) * | 2014-06-19 | 2017-01-11 | 连云港中复连众复合材料集团有限公司 | Method for manufacturing root portion of fan blade with square embedded bolt sleeve |
| CN104653413B (en) * | 2015-03-19 | 2017-05-17 | 无锡风电设计研究院有限公司 | Segmented fan blade connecting structure of large wind machine |
| EP3468781B1 (en) * | 2016-06-14 | 2022-08-03 | Nordex Blade Technology Centre APS | A connection structure of a wind turbine blade and method for its manufacture |
| MA45494A (en) * | 2016-06-22 | 2019-05-01 | Lm Wind Power Int Tech Ii Aps | IMPROVED GLUE SEALED WIND TURBINE BLADE AND RELATED PROCESS |
| DK3708825T3 (en) * | 2019-03-12 | 2023-11-13 | Lm Wind Power As | WINDMILL BLADE AND PROCEDURE FOR MANUFACTURING A WINDMILL BLADE |
-
2021
- 2021-09-17 CN CN202111095099.4A patent/CN113533011B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113533011A (en) | 2021-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8980152B2 (en) | Method of manufacturing an integral profile monolithic wing structure | |
| CN108638541B (en) | Blade shell and web integrated forming method and blade forming method | |
| CN103921450B (en) | A kind of manufacture method of blended wing-body honeycomb sandwich composite eyelid covering | |
| US4822436A (en) | Apparatus for debulking and autoclaving laminates of complex shapes | |
| US7993479B2 (en) | Method for joining precured or cured stringers to at least one structural component of an aircraft or spacecraft | |
| CN109109341B (en) | Preparation method of wind power blade | |
| CN105082568A (en) | Liquid molding process of special-shaped composite structural part | |
| CN108688195B (en) | Trapezoidal skeleton structure of carbon fiber composite material and forming method thereof | |
| CN107791543B (en) | Method for preparing male die for bonding angle of blade trailing edge and method for preparing bonding angle of blade trailing edge | |
| CN111070724A (en) | Integral forming method and tool for composite material U-shaped stringer wallboard | |
| CN113997598A (en) | Composite material thin-wall reinforcing rib forming die and reinforcing rib integrated forming method | |
| CN216636802U (en) | Hat type stringer wallboard, preforming frock structure and co-curing packaging structure | |
| CN113533011B (en) | Sample piece for testing wind power blade connecting structure and manufacturing process thereof | |
| CN110901103B (en) | Manufacturing method of low-cost modular composite material forming tool | |
| CN105140326B (en) | A kind of structural member with photovoltaic module and preparation method thereof | |
| CN113334650B (en) | Connecting structure and splicing method for gaps between segmented flanges of wind power blade mould | |
| CN214726637U (en) | Root splicing type wind power blade | |
| CN115027076A (en) | Manufacturing method of wind power blade bonding angle die | |
| CN109849351B (en) | Composite material wing wall plate and metal wing rib sealing method based on co-bonding process | |
| CN112848349A (en) | Root spliced wind power blade and manufacturing method thereof | |
| CN114536785B (en) | Forming process of cap-shaped stringer reinforced wallboard without twisting strips | |
| CN112208120B (en) | Preform transfer and composite material part layering and method | |
| CN113370555A (en) | Preparation method for integrally forming wind power blade | |
| CN113910637B (en) | Forming method of composite material complex special-shaped air inlet channel | |
| CN112440491A (en) | Method of manufacturing composite structures using a co-curing process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |