CN113459537A - Laying method of wind power blade trailing edge auxiliary beam - Google Patents

Laying method of wind power blade trailing edge auxiliary beam Download PDF

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Publication number
CN113459537A
CN113459537A CN202110908335.3A CN202110908335A CN113459537A CN 113459537 A CN113459537 A CN 113459537A CN 202110908335 A CN202110908335 A CN 202110908335A CN 113459537 A CN113459537 A CN 113459537A
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China
Prior art keywords
glass fiber
fiber cloth
width
blade
layer group
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CN202110908335.3A
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Chinese (zh)
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CN113459537B (en
Inventor
方明明
王国军
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Shanghai Electric Wind Power Group Co Ltd
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Shanghai Electric Wind Power Group Co Ltd
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    • 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
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • 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
    • 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

Abstract

The invention relates to a method for laying a wind power blade trailing edge auxiliary beam, which comprises the steps of laying high-modulus unidirectional glass fiber cloth on a blade to form the auxiliary beam, selecting the high-modulus unidirectional glass fiber cloth with proper width according to the width of a blade tip, sequentially laying a plurality of layers of first high-modulus unidirectional glass fiber cloth in a staggered manner on the blade along the width direction of the high-modulus unidirectional glass fiber cloth, and sequentially laying a plurality of layers of second high-modulus unidirectional glass fiber cloth in a staggered manner along the width direction of the high-modulus unidirectional glass fiber cloth to cover the first glass fiber cloth layer, wherein the first width is smaller than the second width. On the premise of not influencing the mechanical property, the invention reduces the using amount of the high-modulus unidirectional glass fiber cloth at the blade tip part, reduces the weight, can reduce the fatigue load of the blade and the whole machine, and reduces the material cost of the blade.

Description

Laying method of wind power blade trailing edge auxiliary beam
Technical Field
The invention relates to the field of wind power blade manufacturing, in particular to a method for paving auxiliary beams at the rear edge of a wind power blade.
Background
As shown in FIG. 1, in the field of wind power blades, the main bearing structure of the blade comprises a main beam 20 and a rear edge auxiliary beam 10, the inward and outward directions perpendicular to the paper surface are collectively called the blade flapping direction, and the directions from the front edge 2 to the rear edge 1 and from the rear edge 1 to the front edge 2 are collectively called the blade flapping directionThe blade shimmy direction is called span direction in the length direction of the blade, and the width direction is called chord direction. The main beam 20 is made of high-modulus unidirectional fiberglass cloth (hereinafter referred to as unidirectional cloth) or a pultruded plate as a main material and is used for bearing the load in the blade flapping direction. The trailing edge auxiliary beam 10 is made of unidirectional cloth as a main material and is used for bearing the load of the blade in the shimmy direction. The conventional trailing edge auxiliary beam 10 is formed by overlapping and laying a plurality of layers of unidirectional cloth with the same width, wherein the laying mode is generally that an initial position is determined firstly, a first layer of unidirectional cloth is laid, and a second layer is staggered by a certain distance s towards the leading edge direction on the basis of the first layer0And (5) paving, and completing by analogy. Two adjacent layers of unidirectional cloth are staggered by a certain distance s in the width direction0Referred to as a split layer. As shown in FIG. 2, for example, five layers of unidirectional cloth are laid, and a cloth with width of w is used0The unidirectional cloth of (2) specifies the starting and stopping positions in the span direction and the staggered layer distance in the chord direction according to the design requirements, and is laid layer by layer along the blade root 101 to the blade tip direction 102 according to the sequence of the serial numbers 1, 2, 3, 4 and 5.
When the method for laying the auxiliary rear edge beam shown in fig. 2 is used, the problem of excessive material consumption of the unidirectional cloth at the blade tip 102 part occurs, and the manual cutting of the unidirectional cloth in the blade tip direction is time-consuming and labor-consuming in a construction site.
It is therefore desirable to provide a more optimal paving method that addresses the above-mentioned problems.
Disclosure of Invention
In order to solve the problems, the invention provides a method for paving an auxiliary beam at the rear edge of a wind power blade, which specifically comprises the following steps:
selecting a first width w according to the tip width of the blade1The high-modulus unidirectional glass fiber cloth is paved with a first layer number n along the spanwise direction of the blade1First width w of1The high-modulus unidirectional glass fiber cloth forms a first glass fiber cloth layer group; laying a second layer number n above the first glass fiber cloth layer group2Second width w2The high-modulus unidirectional glass fiber cloth forms a second glass fiber cloth layer group;
the first layer number n1First width w of1The high-modulus unidirectional glass fiber cloth is sequentially laid in a staggered manner along the width direction to form the first glass fiber cloth layer group, wherein the first glass fiber cloth layer group is formed by laying the first glass fiber cloth layer group in a staggered mannerThe layer arrangement group starts to be laid from a first position in the chord direction of the blade;
the second layer number n2Second width w2The high-modulus unidirectional glass fiber cloth is sequentially laid in a staggered manner along the chord direction of the blade in a manner of covering the first glass fiber cloth layer group in the chord direction of the blade to form a second glass fiber cloth layer group, and the second glass fiber cloth layer group is laid from the first position;
the breadth direction of each high-modulus unidirectional glass fiber cloth is along the chord direction of the blade, the length direction of each high-modulus unidirectional glass fiber cloth is along the span direction of the blade, and the first breadth w1Is less than the second width w2。
Further, the second glass fiber cloth layer group completely covers the first glass fiber cloth layer group in the chord direction of the blade.
Furthermore, in the first glass fiber cloth layer group, the first width w of two adjacent layers1The staggered layer distance of the width of the high-modulus unidirectional glass fiber cloth along the chord direction is a first width s1；
In the second glass fiber cloth layer group, the second width w of two adjacent layers2The width of the high-modulus unidirectional glass fiber cloth is a second width s along the chord direction staggered layer distance2；
Preferably, the first width s1And a second width s2The relationship of (1) is: s1≤s2＜10s1；
Preferably, the first width s1And a second width s2The relationship of (1) is: s2＝2s1；
Preferably, the first width s1And a second width s2The relationship of (1) is: s2＝s1。
Preferably, the first width w1And a second width w2The relationship is: s1·n1+w1≤w2≤s2·n2+w1。
Furthermore, in the first glass fiber cloth layer group, the lengths of all layers of high-modulus unidirectional glass fiber cloth which are sequentially laid in staggered layers are sequentially decreased; in the second glass fiber cloth layer group, the lengths of all layers of high-modulus unidirectional glass fiber cloth sequentially laid in staggered layers are sequentially decreased; the length of the high-modulus unidirectional glass fiber cloth paved at the bottom layer of the second glass fiber cloth layer group is smaller than that of the high-modulus unidirectional glass fiber cloth paved at the top layer of the first glass fiber cloth layer group.
Further, the first layer number n1And a second number of layers n2The value of (d) is set according to the auxiliary beam strength.
Further, the length of the high-modulus unidirectional glass fiber cloth of each layer is shortened towards the position far away from the blade tip.
The invention has the following beneficial effects:
1. the consumption of the high-modulus unidirectional glass fiber cloth at the blade tip part is reduced, the weight is reduced, the fatigue load of the blade and the whole machine can be reduced, and the material cost of the blade is reduced;
2. the smooth transition of the unidirectional cloth from small width to large width of the leaf tip part is ensured, and the mechanical property is not influenced;
3. the design files are laid according to the design files, cutting is not needed, and labor cost is saved;
4. using a wider width of w2The unidirectional cloth covers the unidirectional cloth paved in the front in the width direction, and the unidirectional cloth consumption of the middle part of the blade is increased, so that the rigidity of the blade in the shimmy direction is increased, and the bearing capacity of the blade is improved.
Drawings
FIG. 1 is a schematic structural view of a wind turbine blade;
FIG. 2 is a schematic diagram of a conventional method for laying high-modulus unidirectional glass fiber cloth;
FIG. 3 is a schematic diagram of a method for laying high-modulus unidirectional glass fiber cloth according to the present invention;
fig. 4 is a schematic diagram of a method for laying high-modulus unidirectional glass fiber cloth according to an embodiment of the present invention.
Detailed Description
The following describes in detail a method for laying an auxiliary beam at the trailing edge of a wind turbine blade according to the present invention with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
As shown in fig. 3, in order to provide the method for laying the auxiliary beam at the trailing edge of the wind turbine blade, the auxiliary beam is formed by laying high-modulus unidirectional fiberglass cloth on the blade, and specifically includes the following steps:
selecting a first width w suitable for the blade tip width according to the blade tip width of the blade1The high-modulus unidirectional glass fiber cloth is paved with a first layer number n along the span direction of the blade1First width w of1The high-modulus unidirectional glass fiber cloth forms a first glass fiber cloth layer group; a second layer n is laid above the first glass fiber cloth layer group along the spanwise direction of the blade2Second width w2The high-modulus unidirectional glass fiber cloth forms a second glass fiber cloth layer group;
wherein the first layer number n1First width w of1The high-modulus unidirectional glass fiber cloth is sequentially laid in a staggered manner along the chord direction of the blade to form a first glass fiber cloth layer group, wherein the first glass fiber cloth layer group is laid from a first position of the chord direction of the blade;
wherein the second layer number n2Second width w2The high-modulus unidirectional glass fiber cloth is sequentially laid in a staggered manner along the chord direction of the blade in a manner of covering the first glass fiber cloth layer group in the chord direction of the blade to form the second glass fiber cloth layer group, and the second glass fiber cloth layer group is laid from the first position.
The width direction of each high-modulus unidirectional glass fiber cloth is along the chord direction of the blade, and the length direction is along the span direction of the blade, namely the direction between the blade root 101 and the blade tip 102 in fig. 3 and 4. Wherein the first layer number n1And a second number of layers n2Is set according to the strength of the auxiliary beam, and the first width w1Is less than the second width w2. First breadth w adopted by the invention1The width w of the high-modulus unidirectional glass fiber cloth1Width w less than traditional high-modulus unidirectional glass fiber cloth0。
Specifically, the second glass fiber cloth layer group completely covers the first glass fiber cloth layer group in the chord direction of the blade, and the remaining high-modulus unidirectional glass fiber cloth of the second glass fiber cloth layer group is sequentially laid in a staggered manner.
In the first glass fiber cloth layer group, the first width w of two adjacent layers1The staggered layer distance of the high-modulus unidirectional glass fiber cloth along the width direction is a first width s1；
In the second glass fiber cloth layer group, the second width w of two adjacent layers2The staggered layer distance of the high-modulus unidirectional glass fiber cloth along the width direction is a second width s2；
The first width s1And a second width s2The relationship of (1) is: s1≤s2＜10s1。
Preferably, the first width w1And a secondWidth w of the cloth2The relationship of (1) is: s1·n1+w1≤w2≤s2·n2+w1。
Further, in the first glass fiber cloth layer group, the lengths of the high-modulus unidirectional glass fiber cloth layers laid in staggered layers in sequence are sequentially decreased progressively, namely the longer the length of the high-modulus unidirectional glass fiber cloth laid at the bottom layer of the first glass fiber cloth layer group is, the shorter the length of the high-modulus unidirectional glass fiber cloth at the top layer is. In the second glass fiber cloth layer group, the lengths of all layers of high-modulus unidirectional glass fiber cloth which are sequentially laid in a staggered mode are sequentially decreased progressively, namely the longer the length of the high-modulus unidirectional glass fiber cloth laid at the bottom layer of the second glass fiber cloth layer group is, the shorter the length of the high-modulus unidirectional glass fiber cloth at the top layer is. The length of the high-modulus unidirectional glass fiber cloth paved on the bottom layer of the second glass fiber cloth layer group is smaller than that of the high-modulus unidirectional glass fiber cloth paved on the top layer of the first glass fiber cloth layer group.
Further, the length of each layer of high modulus unidirectional glass fiber cloth is shortened towards the position far away from the blade tip 102, so that less high modulus unidirectional glass fiber cloth is used in the direction of the blade tip.
Preferably, the first width s1And a second width s2The relationship of (1) is: s2＝s1. With reference to fig. 4, the number of high modulus unidirectional glass fiber fabrics (hereinafter referred to as unidirectional fabrics) is 5, wherein the laying range of the 1 st layer of unidirectional fabrics is as follows: the length direction is from the blade root to the blade tip, and the breadth is 200 mm; laying range of the 2 nd layer of unidirectional cloth: the length direction is reduced relative to the 1 st layer according to the design requirement, the width direction is 20mm with the 1 st staggered layer, and the breadth is 200 mm; laying range of the 3 rd layer of unidirectional cloth: the length direction is reduced relative to the layer 2 according to the design requirement, the width direction is 20mm with the staggered layer of the layer 2, and the breadth is 200 mm; the 1 st to 3 rd layers of unidirectional cloth are laid to form a first glass fiber cloth layer group.
Laying range of the 4 th layer of unidirectional cloth: the length direction is reduced relative to the 3 rd layer according to the design requirement, the width direction starts from the top edge of the 1 st layer (completely covers the 1 st layer), and the breadth is 260 mm; laying range of the 5 th layer of unidirectional cloth: the length direction is reduced relative to the 4 th layer according to the design requirement, the width direction starts from the top edge of the 2 nd layer (completely covers the 2 nd layer), the width is 20mm with the 4 th staggered layer, and the breadth is 260 mm.
In conclusion, on the premise of not influencing the mechanical property, the invention reduces the using amount of the high-modulus unidirectional glass fiber cloth at the blade tip part, reduces the weight, can reduce the fatigue load of the blade and the whole machine, and reduces the material cost of the blade; the design files are laid according to the design files, cutting is not needed, and labor cost is saved; the unidirectional cloth with wider width is used, the unidirectional cloth paved in the front is covered in the width direction, and the using amount of the unidirectional cloth in the middle part of the blade is increased, so that the rigidity of the blade in the shimmy direction is increased, and the bearing capacity of the blade is improved.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.

Claims (7)

1. A method for paving an auxiliary beam at the rear edge of a wind power blade is characterized in that high-modulus unidirectional glass fiber cloth is paved on the blade to form the auxiliary beam, and the method comprises the following steps:
selecting a first width w according to the tip width of the blade1The high-modulus unidirectional glass fiber cloth is paved with a first layer number n along the spanwise direction of the blade1First width w of1The high-modulus unidirectional glass fiber cloth forms a first glass fiber cloth layer group; laying a second layer number n above the first glass fiber cloth layer group2Second width w2The high-modulus unidirectional glass fiber cloth forms a second glass fiber cloth layer group;
the first layer number n1First width w of1The high-modulus unidirectional glass fiber cloth is sequentially laid in a staggered manner along the chord direction of the blade to form a first glass fiber cloth layer group, wherein the first glass fiber cloth layer group is laid from a first position of the chord direction of the blade;
the second layer number n2Second width w2The high-modulus unidirectional glass fiber cloth is sequentially laid in a staggered way along the chord direction of the blade in a way of covering the first glass fiber cloth layer group in the chord direction of the blade to form the second glass fiber cloth layer group,the second glass fiber cloth layer group starts to be laid from the first position;
the breadth direction of each high-modulus unidirectional glass fiber cloth is along the chord direction of the blade, the length direction of each high-modulus unidirectional glass fiber cloth is along the span direction of the blade, and the first breadth w1Is less than the second width w2。
2. The method of claim 1, wherein the second glass cloth layer group completely covers the first glass cloth layer group in the chord direction of the blade.
3. The method of claim 1,
in the first glass fiber cloth layer group, the first width w of two adjacent layers1The staggered layer distance of the width of the high-modulus unidirectional glass fiber cloth along the chord direction is a first width s1；
In the second glass fiber cloth layer group, the second width w of two adjacent layers2The staggered layer distance of the width of the high-modulus unidirectional glass fiber cloth along the chord direction is a second width s2；
The first width s1And a second width s2The relationship of (1) is: s1≤s2＜10s1。
4. The method of claim 3, wherein the first width w1And a second width w2The relationship is: s1·n1+w1≤w2≤s2·n2+w1。
5. The method according to any one of claims 1 to 4,
in the first glass fiber cloth layer group, the lengths of all layers of high-modulus unidirectional glass fiber cloth sequentially laid in staggered layers are sequentially decreased;
in the second glass fiber cloth layer group, the lengths of all layers of high-modulus unidirectional glass fiber cloth sequentially laid in staggered layers are sequentially decreased;
the length of the high-modulus unidirectional glass fiber cloth paved at the bottom layer of the second glass fiber cloth layer group is smaller than that of the high-modulus unidirectional glass fiber cloth paved at the top layer of the first glass fiber cloth layer group.
6. The method according to any one of claims 1 to 4, wherein the first number of layers n1And a second number of layers n2The value of (d) is set according to the auxiliary beam strength.
7. A method according to any one of claims 1 to 4, wherein the length of the high modulus unidirectional fiberglass cloth of each layer is reduced away from the blade tip.
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CN103600498A (en) * 2013-11-07 2014-02-26 重庆通用工业(集团)有限责任公司 Methods for manufacturing and assembling sectional type wind power blade
CN103847108A (en) * 2013-09-26 2014-06-11 黑龙江天华风电设备制造有限公司 Maintaining method of dry fibers at roots of glass fiber reinforced plastic blades
CN105508131A (en) * 2016-01-18 2016-04-20 广东明阳风电产业集团有限公司 Segmented and combined type wind turbine generator blade and manufacturing method thereof
CN107618192A (en) * 2017-09-28 2018-01-23 国电联合动力技术有限公司 A kind of wind power generation unit blade bonding angle and preparation method thereof
CN107672201A (en) * 2017-11-10 2018-02-09 国电联合动力技术(连云港)有限公司 A kind of restorative procedure for wind power generating set damaged blade girder
CN107813509A (en) * 2017-09-21 2018-03-20 株洲时代新材料科技股份有限公司 Wind electricity blade crossbeam spreads cloth method
CN110500242A (en) * 2019-08-26 2019-11-26 上海电气风电集团有限公司 The girder and its core material of wind electricity blade and the laying method of plate
CN111136939A (en) * 2020-01-17 2020-05-12 无锡太湖学院 Prefabricated tail edge beam structure of large wind turbine blade and manufacturing method
CN111469443A (en) * 2020-04-20 2020-07-31 三一重能有限公司 Blade laying auxiliary device and laying method
CN113021951A (en) * 2021-02-07 2021-06-25 江阴市科诚技术有限公司 Method for laying main beam of wind power blade

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103847108A (en) * 2013-09-26 2014-06-11 黑龙江天华风电设备制造有限公司 Maintaining method of dry fibers at roots of glass fiber reinforced plastic blades
CN103600498A (en) * 2013-11-07 2014-02-26 重庆通用工业(集团)有限责任公司 Methods for manufacturing and assembling sectional type wind power blade
CN105508131A (en) * 2016-01-18 2016-04-20 广东明阳风电产业集团有限公司 Segmented and combined type wind turbine generator blade and manufacturing method thereof
CN107813509A (en) * 2017-09-21 2018-03-20 株洲时代新材料科技股份有限公司 Wind electricity blade crossbeam spreads cloth method
CN107618192A (en) * 2017-09-28 2018-01-23 国电联合动力技术有限公司 A kind of wind power generation unit blade bonding angle and preparation method thereof
CN107672201A (en) * 2017-11-10 2018-02-09 国电联合动力技术(连云港)有限公司 A kind of restorative procedure for wind power generating set damaged blade girder
CN110500242A (en) * 2019-08-26 2019-11-26 上海电气风电集团有限公司 The girder and its core material of wind electricity blade and the laying method of plate
CN111136939A (en) * 2020-01-17 2020-05-12 无锡太湖学院 Prefabricated tail edge beam structure of large wind turbine blade and manufacturing method
CN111469443A (en) * 2020-04-20 2020-07-31 三一重能有限公司 Blade laying auxiliary device and laying method
CN113021951A (en) * 2021-02-07 2021-06-25 江阴市科诚技术有限公司 Method for laying main beam of wind power blade

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