EP3227551A1 - Rotorblatt für windkraftanlagen - Google Patents
Rotorblatt für windkraftanlagenInfo
- Publication number
- EP3227551A1 EP3227551A1 EP15804150.9A EP15804150A EP3227551A1 EP 3227551 A1 EP3227551 A1 EP 3227551A1 EP 15804150 A EP15804150 A EP 15804150A EP 3227551 A1 EP3227551 A1 EP 3227551A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- spar
- rotor blade
- segment
- bush
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05B2240/302—Segmented or sectional blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/30—Retaining components in desired mutual position
- F05B2260/301—Retaining bolts or nuts
-
- 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
Definitions
- the invention relates to a segmented rotor blade for wind power plants with at least two blade segments.
- the invention also relates to a Windkraft- anläge with a multi-bladed rotor having such a segmented rotor blade.
- Segmented rotor blades require a connection technique at their joining Job.
- a segmented rotor blade which is composed at its spars.
- the spar section projects beyond the joint into the second segment, wherein the spars are fixed against one another with the aid of a screw connection.
- the spars are pressed against one another in a force-locking manner with the crossbar screw connection in order to achieve the highest possible stability and rigidity.
- the disadvantage here is in particular the fact that the necessary components for the screw must be made very accurately, otherwise it can lead to stresses within the components that can contribute to the failure of the screw.
- a degree of tolerance is not always given.
- a segmented rotor blade is known from EP 2 288 807 B1 in which, in one of the segments, the spar section likewise extends beyond the joint into the other segment.
- the two segments are bolted to the ends of the spars by means of the spars in order to achieve a frictional connection at the joint.
- a rotor blade for wind energy machines and clamping devices for assembly is disclosed, wherein two rotor blade segments are held together by means of an expansion screw.
- a rotor blade for wind turbines is known, which also consists of several segments, wherein the individual segments are joined together by means of a bond.
- a major problem in the connection of segmented rotor blades by means of a screw connection is the fact that the bushings of the two rail sections involved in the screw must be positioned with high accuracy so that they are aligned exactly axially. Only then is a play-free connection of the two rotor blade segments possible, which withstands the stresses of a wind turbine in continuous operation.
- the openings required in the spars are made in the assembled state in one step, which requires that the individual segments must be assembled at least once in the manufacture of the rotor blade in order to produce the bushing holes can.
- this has several disadvantages. On the one hand, a lot of space in the production hall is needed, which has a negative effect on the investment costs.
- a segmented rotor blade for wind turbines which has at least two blade segments, wherein the two or more blade segments in the assembled state form the later rotor blade for the wind turbine.
- the at least two blade segments have a joint from which they extend in the opposite direction.
- the two blade segments are assembled, wherein the outer surface of each blade segment in the region of the joint is coordinated so that results in the assembled state, a smooth and continuous surface.
- Each blade segment in this case has at least one spar element, which forms a structural element of the rotor blade so as to be able to absorb and remove the forces acting on the rotor blade in a corresponding manner.
- a spar connector extends in the direction of the second blade segment into a connecting portion of the spar member of the second blade segment, so as to connect the blade segments via the spar members together.
- the Holmverbinder also called bridge bridge, connecting the two beam elements of the two blade segments, so as to be able to connect the two blade segments safely and reliably together.
- the spar connector extends from the spar member of the first blade segment over the joint in the direction of the second blade segment, wherein the spar connector thereby extends into a connecting region of the spar member of the second blade segment.
- a positive and / or non-positive connection then takes place, for example by means of a screw connection, so that the spar connector is firmly connected to the spar member of the second blade segment. Since the spar connector is also firmly connected to the spar member of the first blade segment, thus resulting in a firm connection between the spar member of the first and the second blade segment.
- both the spar connector and the spar member of the second blade segment in the connection area in each case openings in which sockets are inserted for receiving at least one connecting pin, so that the connecting pin can be passed through the respective sockets for connection of the spar connector with spar member of the second blade segment.
- For each connecting pin preferably two connecting pins, in each case corresponding openings and bushings are provided in the spar connector and the spar member of the second blade segment.
- At least one of the bushings is designed as a sliding bush axially movable in the opening. This makes it possible to ensure a tolerance compensation, whereby the segmented rotor blade is less sensitive to manufacturing inaccuracies and also is much easier to assemble.
- the sliding bush is thus designed such that it is pressed against the axially following bushing in the direction of the acting connecting force and thus rests against it in a force-fitting manner.
- the beam elements can be formed, for example, in each case from two opposite web sections, which are connected to one another via two opposite belt sections, the belt section lying flat in the plane of rotation of the rotor blade.
- the web portions thus form the stability of the rotor blade out of the plane of rotation, while the belt portions cushion the forces acting on the rotor blade in the plane of rotation.
- the openings are provided in the web sections of the rail element, wherein the rail connection can of course also be formed from webs and belt sections.
- connection of the two blade segments can be firmly connected by means of a bar gland via their spars formed from web sections and belt sections.
- the ridges of a rotor blade mainly absorb the thrust forces acting on the rotor blades by the wind.
- the belts take the so-called impact bending moment, which is also caused by the wind flow.
- the spar member of the second blade segment at least in the connecting portion has a cavity into which the spar connector extends in the assembled state of the two blade segments, wherein at least one socket of the spar member of the second leaf segment is designed as a sliding bushing.
- the spar connector is thus inserted upon mating of the two blade segments in the cavity of the spar member of the second blade segment, wherein one of the bushings of the spar member of the second blade segment is then designed as a sliding bush, whereby the sliding bush is moved during fixed connection by means of the connecting pin axially in the direction of the cavity until they are connected to the socket of the spar connection it strikes and is connected with this force-fit.
- both bushes of the spar member of the second blade segment are designed as sliding bushing.
- the connecting bolt which may be formed as a connecting screw
- the beam connector is frictionally connected on both sides with the sliding bushes.
- the spar connector is part of the spar member of the first blade segment, so that the spar member of the first blade segment in the form of the spar connector extends into the connecting portion of the spar member of the second blade segment.
- the spar member of the first blade segment extends beyond the joint in the direction of the second blade segment.
- the spar connector is thus integrally connected to the spar member of the first leaf segment.
- the spar connector tapers in the direction of the connecting portion, in the direction of which the spar connector extends.
- the spar connector tapers so that the belt sections on the one hand flatten and beyond possibly also the web portions taper, which in particular an improved and simplified assembly made light. In other words, the belt thickness decreases toward the end of the spar connector.
- a clamping bush is introduced into at least one of the openings, which has a passage in which the respective bush, in particular the sliding bush, is introduced.
- the clamping bush is designed such that it can change the inner (and / or outer) diameter, whereby elements introduced into the opening of the clamping bush can be frictionally connected to the clamping bush and the clamping bush itself can be clamped in a bore.
- the sliding bushing is initially guided axially movable in the clamping bush, so that when connecting by means of the connecting bolt, the sliding bush can be pressed against the axially following bushing element frictionally, then subsequently the sliding bushing is frictionally connected to the clamping bush, so that the sliding bush is firmly connected via the clamping bush with the respective element, for example the spar connector or the spar element.
- the slide bushing is mounted axially movable in a flange bushing introduced in the respective opening, it being advantageous, for example, for the slide bushing to be moved by means of one of Secure externally screwed threaded ring.
- At least one of the bushes has a toothing, which engages in a toothing of an adjacent bushing for the positive connection.
- an outer bushing has an inwardly directed toothing, which engages in a toothing of an axially following bushing of the element to be connected, whereby the bushings are also positively connected in addition to the non-positive tension.
- the first leaf segment is the tip leaf segment (also called tip leaf segment), while the second leaf segment is the root leaf segment.
- the bushings or in particular the sliding bush is designed coaxially, so that a tolerance compensation in other directions and levels is possible by turning the sliding bushing in the respective opening.
- FIG. 1 shows schematically in a plan view the segmented rotor blade 10, which has a first blade segment 11 and a second blade segment 12. Both blade segments 1 1 and 12 each have a spar member 21 and 22, which together form a structural element of the rotor blade 10. At the end edge 13 of the rotor blade 10, an end edge belt 1 6 may be provided which stabilizes the rear portion of the rotor blade 10.
- the two blade segments 1 1 and 12 are thereby joined together at a joint 14, wherein the spar member 21 of the first blade segment 1 1 extends beyond the joint 14 also in the direction of the second blade segment 12.
- the spar member 22 of the second blade segment 12 in this case has a cavity 24 in which the spar member 21 of the first blade segment 1 1 extends into it.
- the spar member 21 of the first blade segment 1 1 extends into the connecting region 23 of the second blade segment 12, in which the spar member 21 of the first blade segment 1 1 is connected to the spar member 22 of the second blade segment 12 via a screw 30.
- FIGS. 2 to 4 now explain the screw connection 30 of FIG. 1 in cross-section AA.
- FIG. 2 shows in cross-section of the screw 30, the inner spar member 21 of the first blade segment 1 1, which is inserted into the cavity of the outer beam element 22 of the second blade segment 12.
- Both the inner spar member 21 and the outer spar member 22 is formed from opposite web sections, which are connected to each other via belt sections.
- the outer beam element 22 has an upper belt portion 40a and a lower belt portion 40b which connects the two web portions 41a and 41b with each other.
- the inner spar member 21 is formed.
- the web portion 41 a is facing the front edge 15, while the web portion 41 b of the rotor blade trailing edge 13 faces.
- the belt portions 40a and 40b lie flat in the plane of rotation of the rotor blade.
- openings are provided in the region of the screw, in which according to the invention sockets are introduced, of which at least one of the bushes is a sliding bushing.
- a flange bushing 50 is provided in the web portions 41 a, 41 b of the spar member 22 (outer spar member) initially in the openings, which is formed for receiving the slide bushing 51 in the respective flange bush 50.
- a through bushing 52 is provided in the openings of the web sections 43a, 43b, which axially aligns with the opening of the sliding bush 51 of the outer rail element 22.
- a connecting pin 53 can now be passed, which is designed for example in the form of a screw.
- the screw has a screw head 54, at the opposite end of which a thread is provided, onto which a nut 55 is attached. is screwed.
- FIG 3 shows an embodiment in which only the bushing of the web portion 41 a of the spar member 22, which faces the blade leading edge 15, is designed as a sliding bushing 51.
- a Flanschbuchse 57 is introduced with internal thread in the web portion 41 b, so that the screw head 54 of Figure 2 can be omitted.
- the screw 53 is thus screwed when connecting the two blade segments in the flange bushing 57, in which case by tightening the nut 55, a force acts in the direction of the flange bushing 57, whereby the sliding bushing 51 is pushed to the through bushing 52.
- the inner spar member 21 is pressed with a through bushing 52 to the flange bushing 57 with internal thread, so that ultimately results in a positive connection between the respective sockets.
- the rotor blade shell is no longer simply interrupted at the trailing edge.
- the Endkantengurt contained therein carries relatively high loads, which need not be transmitted multiple times.
- Figure 4 shows an embodiment in which the sliding bushing 51 and also the continuous bushing 52 of the inner spar member 21 in a clamping bush 60, 61 are guided.
- the sliding bushing 58 has an internal thread at the end edge 13, so that the connecting bolt or the connecting bolt 53 can be screwed into this sliding bush with internal thread 58.
- clamping bushes 60, 61 has the advantage that the sliding bushes 51 and the continuous bushing 52 become axially variable, so that in particular manufacturing inaccuracies can be compensated much better. Because with the help of the clamping bushes 60, 61 can be realized two states, namely on the one hand, the state in which the respective sockets in the clamping bushes are axially movable, and the second state in which the clamping bushes are clamped frictionally with the respective inboard bushes.
- the bushings have teeth 70 which engage in a respective corresponding toothing of the adjacent socket, so that the jacks are also positively connected in addition to the non-positive tension.
- the sliding bushing 51 of the web portion 41 a has a toothing 70 which engages in the toothing of the continuous sleeve 52, wherein the flange bushing 57 of the web portion 41 b also has a toothing 70 which in the toothing the continuous socket 52 engages on this side.
- the flange bushings 50 may be glued, for example, in the web portions 41 a, 41 b, so as to allow a firm connection.
- the continuous bushing 52 of the inner spar member 21 may also be glued in the respective web portions 43a, 43b beyond. In order to achieve as high a weight saving potential as possible, it is advantageous if both blade segments consist of a fiber composite material or at least have such. Reference number list
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014118004.6A DE102014118004B3 (de) | 2014-12-05 | 2014-12-05 | Rotorblatt für Windkraftanlagen |
PCT/EP2015/078545 WO2016087594A1 (de) | 2014-12-05 | 2015-12-03 | Rotorblatt für windkraftanlagen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3227551A1 true EP3227551A1 (de) | 2017-10-11 |
Family
ID=54771133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15804150.9A Withdrawn EP3227551A1 (de) | 2014-12-05 | 2015-12-03 | Rotorblatt für windkraftanlagen |
Country Status (4)
Country | Link |
---|---|
US (1) | US20170268482A1 (de) |
EP (1) | EP3227551A1 (de) |
DE (1) | DE102014118004B3 (de) |
WO (1) | WO2016087594A1 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016123346B3 (de) * | 2016-12-02 | 2017-12-28 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Faserverbundbauteil, Faserverbundstruktur und Herstellung derselben |
US10495058B2 (en) * | 2017-02-21 | 2019-12-03 | General Electric Company | Joint assembly for rotor blade segments of a wind turbine |
EP3376024A1 (de) | 2017-03-13 | 2018-09-19 | Nordex Energy GmbH | Teilbares windenergieanlagenrotorblatt mit bolzenverbindung |
US10570879B2 (en) | 2017-05-23 | 2020-02-25 | General Electric Company | Joint assembly for a wind turbine rotor blade with flanged bushings |
EP3425195A1 (de) | 2017-07-05 | 2019-01-09 | Nordex Energy GmbH | Teilbares windenergieanlagenrotorblatt mit einer buchsenbaugruppe |
US10563636B2 (en) | 2017-08-07 | 2020-02-18 | General Electric Company | Joint assembly for a wind turbine rotor blade |
US10920743B2 (en) | 2017-08-17 | 2021-02-16 | General Electric Company | Misaligned spar cap scarf joint connection |
US10961982B2 (en) | 2017-11-07 | 2021-03-30 | General Electric Company | Method of joining blade sections using thermoplastics |
EP3524412A1 (de) | 2018-02-12 | 2019-08-14 | Nordex Energy GmbH | Teilbares windenergieanlagenrotorblatt mit einer blitzschutzeinrichtung und verfahren zur herstellung eines solchen windenergieanlagenrotorblatts |
DE102018103344A1 (de) * | 2018-02-14 | 2019-08-14 | Wobben Properties Gmbh | Verfahren zur Herstellung eines geteilten Rotorblatts und Rotorblatt |
DK3874145T3 (da) * | 2018-11-01 | 2023-08-14 | Gen Electric | Rotorvinge til en vindmølle konstrueret af forskellige materialer |
AU2018447765A1 (en) * | 2018-11-01 | 2021-05-20 | General Electric Renovables España, S.L. | Method for installing and retaining a bushing in a bearing block of a rotor blade joint |
MX2021004920A (es) * | 2018-11-01 | 2021-05-27 | Gen Electric | Turbina eolica con aspa de rotor adjunta que posee una clavija de extension en forma de cuerda. |
US11353002B2 (en) | 2019-01-16 | 2022-06-07 | Roller Bearing Company Of America, Inc. | Multi segment wind turbine blade joint bushing |
GB202018692D0 (en) * | 2020-11-27 | 2021-01-13 | Lm Wp Patent Holding As | A mechanism for restraining movement of a locking pin |
CN115977867B (zh) * | 2023-03-20 | 2023-06-09 | 新创碳谷集团有限公司 | 一种分段式叶片模块结构及其成型方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3109566C2 (de) * | 1981-03-13 | 1983-04-07 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Rotorblatt für Windenergiemaschinen und Spannvorrichtung zu seiner Montage |
US8221085B2 (en) * | 2007-12-13 | 2012-07-17 | General Electric Company | Wind blade joint bonding grid |
CA2703641A1 (en) * | 2008-01-14 | 2009-07-23 | Clipper Windpower, Inc. | A modular rotor blade for a power-generating turbine and a method for assembling a power-generating turbine with modular rotor blades |
US9765756B2 (en) * | 2008-05-07 | 2017-09-19 | Vestas Wind Systems A/S | Sectional blade |
WO2010023299A2 (en) * | 2008-08-31 | 2010-03-04 | Vestas Wind Systems A/S | A sectional blade |
ES2536290T3 (es) * | 2009-12-02 | 2015-05-22 | Vestas Wind Systems A/S | Pala de turbina eólica en secciones |
-
2014
- 2014-12-05 DE DE102014118004.6A patent/DE102014118004B3/de active Active
-
2015
- 2015-12-03 EP EP15804150.9A patent/EP3227551A1/de not_active Withdrawn
- 2015-12-03 WO PCT/EP2015/078545 patent/WO2016087594A1/de active Application Filing
- 2015-12-03 US US15/532,177 patent/US20170268482A1/en not_active Abandoned
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2016087594A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2016087594A1 (de) | 2016-06-09 |
US20170268482A1 (en) | 2017-09-21 |
DE102014118004B3 (de) | 2016-03-31 |
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