WO2019186220A1 - Système de protection d'un bord d'attaque sur une pale de rotor d'éolienne, feuille sous vide destinée à être utilisée dans le système et procédé de protection in situ d'une partie d'un bord d'attaque d'une pale de rotor d'éolienne - Google Patents

Système de protection d'un bord d'attaque sur une pale de rotor d'éolienne, feuille sous vide destinée à être utilisée dans le système et procédé de protection in situ d'une partie d'un bord d'attaque d'une pale de rotor d'éolienne Download PDF

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Publication number
WO2019186220A1
WO2019186220A1 PCT/IB2018/000309 IB2018000309W WO2019186220A1 WO 2019186220 A1 WO2019186220 A1 WO 2019186220A1 IB 2018000309 W IB2018000309 W IB 2018000309W WO 2019186220 A1 WO2019186220 A1 WO 2019186220A1
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WO
WIPO (PCT)
Prior art keywords
vacuum
sheet
protective cover
rotor blade
cover sheet
Prior art date
Application number
PCT/IB2018/000309
Other languages
English (en)
Inventor
Kristian BØRSTING
Original Assignee
Polytech A/S
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Polytech A/S filed Critical Polytech A/S
Priority to PCT/IB2018/000309 priority Critical patent/WO2019186220A1/fr
Publication of WO2019186220A1 publication Critical patent/WO2019186220A1/fr

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Classifications

    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/001—Joining in special atmospheres
    • B29C66/0012—Joining in special atmospheres characterised by the type of environment
    • B29C66/0014—Gaseous environments
    • B29C66/00145—Vacuum, e.g. partial vacuum
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81455—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being a fluid inflatable bag or bladder, a diaphragm or a vacuum bag for applying isostatic pressure
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • 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
    • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
    • B29C73/04—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D using preformed elements
    • B29C73/10—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D using preformed elements using patches sealing on the surface of the article
    • B29C73/12—Apparatus therefor, e.g. for applying
    • 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
    • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
    • B29C73/24—Apparatus or accessories not otherwise provided for
    • B29C73/30—Apparatus or accessories not otherwise provided for for local pressing or local heating
    • B29C73/32—Apparatus or accessories not otherwise provided for for local pressing or local heating using an elastic element, e.g. inflatable bag
    • 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
    • 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
    • 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
    • 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

Definitions

  • a SYSTEM FOR PROTECTING A LEADING EDGE ON A WIND TURBINE ROTOR BLADE A VACUUM SHEET FOR USE IN THE SYSTEM AND A METHOD FOR, IN SITU, PROTECTING A PART OF A LEADING EDGE OF A WIND TURBINE ROTOR BLADE
  • the present invention relates to a system for protecting a leading edge on a wind turbine rotor blade, a vacuum sheet for use in the system and a method for, in situ, protecting a part of a leading edge of a wind turbine rotor blade.
  • a wind turbine includes a wind turbine foundation, a tower erected on the foundation, a nacelle and a rotor hub mounted on top of the tower.
  • the rotor hub comprises a number of rotor blades.
  • the nacelle comprises a generator being connected via a gearbox to the rotor hub.
  • the rotor blades transform wind energy into a mechanical rotational torque of the rotor hub being coupled to the gearbox.
  • the gearbox increases the low rotational speed of the rotor hub for the generator to enable the rotational me chanical energy to be efficiently converted to electrical energy which is supplied to a utility grid.
  • Wind turbines are often operated in extreme environmental conditions where the wind turbine blades are vulnerable to erosion, lightning strike and icing.
  • Erosion to the edge has the possibility of causing physical damage to the blade and may cause the wind turbine to shut down for extended periods of time.
  • leading edges of the rotating blades are particularly subject to erosion and subsequent wear.
  • newer long wind turbine blades have been found to cause problems, since the relative speed between the air and the blade surface is high.
  • Wind turbine blades located in severe environments may also be subject to leading edge wear or erosion, further resulting in frac tures from high velocity impact with objects such as rain, hail, seawater, sand, animals or other particulates. Such damage may increase operational maintenance and replace ment costs, decrease electric power generation during associated maintenance out ages, and decrease the expected life spans of the blades.
  • Much effort has been made by wind turbine manufacturers to enhance the robustness of wind turbine blades so that they are able to operate effectively in the environment in order to avoid damage to the blade and the cost associated with turbine down-time during blade repair or replacement.
  • coatings are applied on the leading edges of the rotor blades to inhibit erosion. Such coatings, however, provide only limited protection, and over time, the leading edges may still erode. Therefore, there is an increasing need for a coating that can be retrofitted on older wind turbine blade having beginning corro- sion.
  • the applicant company has been producing and developing protective covers for wind turbine blades and has been involved in improving protective covers, disclosed in among others EP3218597, which is incorporated in the present disclosure by refer ence, and relating to an improved pre-formed protective cover made of a polyurethane material prepared from a polyol, butanediol, and an isocyanate, the preformed protec- tive cover being adapted to be attached along at least a part of a longitudinal edge of the wind turbine blade by adhesion of an inside of the preformed protective cover to a surface of the longitudinal edge of the wind turbine blade.
  • a known process for repairing a corroded surface on a rotor blade is raising a basket with personnel up to the rotor blade or lowering the personal via a rope and then after a preparation of the blade directly applying an adhesive onto the rotor blade surface. After applying the adhesive, a protective cover is arranged over the corroded surface area and manually by the personal and with the hands applying a pressure onto the cover for binding of the cover onto the rotor blade surface.
  • a system for, in situ, protecting a part of a leading edge of a wind turbine rotor blade comprising: a protective cover sheet adapted to be placed and affixed by adhesion on the part of the leading edge,
  • the protective cover sheet having a top cover surface, a bottom cover sur- face for facing the part of the leading edge, and a number of peripheral side edges, preferably four side edges, a pressure-sensitive adhesive material, adapted for adhesively fixing the cover bottom surface of the protective cover sheet to the part of the leading edge, a vacuum sheet adapted for being affixed on top of the protective cover sheet in a full covering and overlapping manner,
  • the vacuum sheet having a top surface and a bottom surface for facing the protective cover sheet, the bottom surface having a textured surface pattern, a number of peripheral side edges, preferably four side edges, and a sealing element arranged at a peripheral circumference of the bottom surface and adapted for overlapping the protective cover sheet and engaging the rotor blade surface in a sealingly manner, hereby adapted for arranging the protective cover sheet in a sealed chamber between the surface of the rotor blade and the vacuum sheet, the vacuum sheet at the top surface having an opening for connecting a vacuum system, and a vacuum system adapted for being connected to the opening for creating a negative pressure inside the sealed chamber for activating the pressure-sensi- tive adhesive material.
  • the system for protecting a part of a leading edge of a wind turbine rotor blade is de- scribed in relation to a traditional horizontal axis wind turbine having three rotor blades.
  • the protective cover sheet could also be attached to the leading edge on a rotor of another type of wind turbine, e.g. a vertical axis wind turbine such as a“Dar- rieus” or a“Helix”, and to both wind turbines onshore or offshore.
  • the protective cover may also be attached to a different part of the rotor blade than the leading edge, and may be attached to the rotor blade in situ or in an alternative embodiment be attached to the rotor blade on ground surface.
  • the pressure-sensitive adhesive material is in a preferred embodiment pre-mounted onto the bottom surface of the protective cover sheet; however, the protective cover sheet and the pressure-sensitive adhesive material may be separate elements suitable for being assembled on site.
  • the bottom surface of the vacuum sheet is in a preferred embodiment having a tex- tured surface pattern, for in an enhanced mounting process letting air escape from the sealed chamber between the vacuum sheet and the surface of the rotor blade by the use of a vacuum system.
  • the protective cover sheet and the vacuum sheet is in a preferred embodiment de- scribed as having a top surface, a bottom surface and four side edges.
  • the protective cover sheet and the vacuum sheet may be arranged having a number of edges, e.g. be found or having a different number of side edges e.g. 2, 3, 5, 6 or more.
  • the protective cover sheet is made of a polymer material, such as a polyether based polyurethane, is elongated in a longitudinal direction and has a central cover sheet section extending in the longitudinal direction and two peripheral cover sheet sections extending in the longitudinal di- rection at either side of the central cover sheet section, respectively, the central cover sheet section having a minimum thickness of at least 1 millimeter, and each peripheral cover sheet section having a thickness decreasing from a maximum thickness of at least 1 millimeter to a minimum thickness of less than 1/2 millimeter.
  • the particular form of the peripheral cover sections provides for a good transition from the central cover section of the preformed protective cover to the surface of the rotor blade.
  • a good transition without edges is of great importance in order to avoid that the wind will destroy the materials.
  • a sealing material may be applied in a possible groove between an edge of the peripheral cover sections and the surface of the rotor blade in order to even further improve the transition.
  • each peripheral cover section may correspond to the mini mum thickness of the central cover section.
  • the minimum thickness of the central cover section may be at least 2 millimetres, preferably at least 3 millimetres, more preferred at least 4 millimetres, and most preferred approximately 5 millimetres.
  • the thickness of the central cover section may be at least substantially constant from side to side of the central cover section.
  • the bottom surface of the vac uum sheet has a textured surface pattern defining a number of airflow channels in con nection with the opening.
  • the textured surface pattern has a plurality of projections being individually spaced.
  • the textured surface pattern of the bottom surface defines a plurality of air-flow chan nels between the vacuum sheet and the protective cover sheet when the vacuum sheet is mounted to the protective cover sheet, and a plurality of projections arranged between the air-flow channels for abutting the top surface of the protective cover sheet. Air which is trapped between the vacuum sheet and the protective cover sheet may thus easily escape out of the opening arranged in the vacuum sheet when the vacuum system is connected to the opening.
  • the vacuum sheet is in a preferred embodiment pre-mounted with the sealing element at the peripheral circumference; however, the sealing element and the vac uum sheet may be separate elements suitable for being bonded in site.
  • the protective cover sheet is arranged on the rotor blade and the vacuum sheet with the connected vacuum system is arranged to the rotor blade and the protective cover sheet, the protective cover sheet is sealed in a chamber defined by the space between the vacuum sheet and the rotor blade surface. The vacuum system escapes all or near all air from the sealed space and creates a vacuum inside the chamber.
  • the vacuum inside the sealed chamber creates an equal force acting in a direction to- wards the rotor blade and forces the plurality of abutting surfaces against the top surface of the protective cover sheet, activating the pressure-sensitive adhesive material.
  • the textured surface pattern is corrugated.
  • the textured surface of the vacuum sheet may have a variety of patterns.
  • the function of the textured surface pattern is to establish a plurality of air-flow channels between the vacuum sheet and the protective cover sheet when being mounted, and for arrang ing a plurality of projections at the bottom surface of the vacuum sheet for acting a force against the protective coversheet, hereby activating the pressure-sensitive adhesive material.
  • a person skilled in the art may thus advise a variety of surface patterns suitable for the above.
  • the sealing element has an ad hesive tape for adhesively connecting the vacuum sheet to the rotor blade.
  • the sealing element which is arranged at a peripheral cir- cumference on the bottom surface of the vacuum sheet, is an adhesive tape such as a double-sided self-adhesive tape.
  • the sealing may be a silicone or similar synthetic compound or in a further alternative a static cling tape.
  • the vacuum system has a vac- uum pump and a hose.
  • the vacuum system is preferable a vacuum pump being connected to the vacuum sheet via a hose.
  • a vacuum pump can be manufactured smaller than an air pressure pump and is hereby more easily transported. Further, having a vacuum pump instead of an air pressure pump requires a far smaller sealing element of the vacuum sheet, as the created vacuum“sucks” the vacuum sheet towards the rotor blade.
  • the vacuum system may be an air pressure system, creating a positive air pressure in the sealed chamber between the rotor blade and a sealing sheet similar to the vacuum sheet. The skilled person will thus advise a suitable seal- ing element at the circumferential peripheral edge of the sealing sheet to establish a sealing suitable to withstand the positive air pressure.
  • a vacuum sheet having a top surface, a bottom surface and a number of periph eral side edges, preferably four side edges, and a sealing element arranged at a pe ripheral circumference of the bottom surface, the top surface having an opening for connecting a vacuum system, and the bottom surface having a textured surface pat tern defining a number of air-flow channels in connection with the opening.
  • the textured surface pattern has a plurality of projections being individually spaced.
  • the textured surface pattern is corrugated.
  • a method for, in situ, protecting a part of a leading edge of a wind turbine rotor blade comprising:
  • the protective cover sheet having:
  • top cover surface a top cover surface, a bottom cover surface opposite said top cover sur face for facing the part of the leading edge, and a number of peripheral side edges, preferably four side edges defining a first circumference, - providing a pressure-sensitive adhesive material for bonding the protective cover sheet to said part of the leading edge,
  • a vacuum sheet adapted for being affixed to the top surface of the protective cover sheet in a full covering and overlapping manner, the vacuum sheet having a top surface and a bottom surface for facing the protective cover sheet, a number of peripheral side edges, preferably four side edges defining a second circumference, the vacuum sheet further having an opening constituting an outlet for connecting a vacuum system,
  • the method further comprising:
  • the vacuum sheet being removed from the rotor blade surface, leaving the protective cover adhe sively fixed to the rotor blade surface.
  • the part of a leading edge of a wind turbine rotor blade to which the protective cover sheet is to be attached is typically prepared before mounting, e.g. by removing any corroded or damaged surface material with a grinder or other suitable tool. Also rotor blades intended for an aftermarket may be refurnished with a protective cover.
  • the protective cover sheet is preferable pre-mounted with the pressure-sensi- tive adhesive material, but may in an alternative embodiment be bonded in site.
  • This aspect also applies to the sealing element, which in a preferred embodiment is pre formed with the sealing element.
  • the pressure-sensitive material may in an alternative embodiment be applied to the protective cover sheet on-site before the protective cover sheet (including the pres sure-sensitive material) is arranged on the rotor blade, or the pressure-sensitive mate rial may first be arranged on the rotor blade and the protective cover sheet may sec ondly be arranged to the pressure-sensitive adhesive material.
  • the vacuum sheet is arranged to the protective cover sheet in an overlapping manner, hereby the peripheral edges of the vacuum sheet overlapping the peripheral edges of the protective cover sheet.
  • the sealing element of the vacuum sheet is attached to the rotor blade in a close prox imity to the peripheral edges of the protective cover sheet, and the vacuum system is connected to the opening of the vacuum sheet and activated.
  • a negative pressure is established inside the sealed chamber between the vacuum sheet and the rotor blade, preferably at a pre ferred negative pressure of approximately -1 bar. This results in a pressure of approximately 1 bar acting on the top surface of the protective cover sheet in a direction to wards the rotor blade, and activates the pressure-sensitive adhesive material.
  • Fig. 1 shows a perspective view of a wind turbine and a protective cover.
  • Fig. 2 shows a perspective view of the system for protecting a part of a leading edge of a wind turbine rotor blade.
  • Fig. 3 shows a perspective view of a part of a leading edge of a wind turbine rotor blade and the protective cover sheet having pressure-sensitive adhesive material.
  • Fig. 4 shows a perspective view of a part of a leading edge of a wind turbine rotor blade, the protective cover sheet, and the pressure-sensitive adhesive material.
  • Fig. 5 shows a perspective view of a part of a leading edge of a wind turbine rotor blade, the protective cover sheet, and the vacuum sheet.
  • Fig. 6 shows a perspective view of a part of a leading edge of a wind turbine rotor blade, the protective cover sheet, and the vacuum sheet being affixed to the rotor blade.
  • Fig. 7 shows a perspective view of a part of a leading edge of a wind turbine rotor blade, the protective cover sheet, and the vacuum sheet being affixed to the rotor blade and connected to a vacuum pump.
  • Fig. 8 shows a perspective view of a part of a leading edge of a wind turbine rotor blade, the protective cover sheet, and the vacuum sheet being affixed to the rotor blade and vacuum activated.
  • Fig. 9A shows a cross-sectional view of the rotor blade, the protective cover sheet, and the vacuum sheet exposed to vacuum pressure.
  • Fig. 9B shows a blow-up of the cross-section in fig. 9A.
  • Fig. 1 shows a perspective view of a wind turbine 28 and a protective cover 12.
  • the wind turbine is illustrated having a tower 36 erected on a tower foundation (not shown), a nacelle 34, and a rotor hub 32.
  • the rotor hub 32 is illustrated having three rotor blades 30, and the leading edge of one of the rotor 30 blades is illustrated with a protective cover sheet 12 being affixed in the direction of the arrows.
  • Fig. 2 shows a perspective view of the system 10, protecting a part of a leading edge of a wind turbine rotor blade 30.
  • the system 10 is illustrated having a protective cover sheet 12 having a top surface and a bottom surface for facing the rotor blade 30.
  • the bottom surface of the protective cover sheet 14 is illustrated having a layer of adhesive material which according to the invention is arranged as a pressure-sensitive adhesive material.
  • the system is further illustrated with a vacuum sheet 16 having a top surface and a bottom surface for facing the protective cover sheet 12 and an opening 22 for connect- ing a vacuum system, which is illustrated as a vacuum pump 24 having a hose 26.
  • the bottom surface of the vacuum sheet is illustrated having a textured surface pattern de fining a plurality of air-flow channels being in fluid connection with the opening 22.
  • the bottom surface of the vacuum sheet 16 is illustrated having a sealing element 18 for sealing against the surface of the rotor blade 30 in a proximity of the peripheral edges of the protective cover sheet 12.
  • Fig. 3 shows a perspective view of a part of a leading edge of a wind turbine rotor blade 30 and the protective cover sheet 12 having pressure-sensitive adhesive mate rial 14.
  • the protective cover sheet 12 is illustrated in a direction of arrangement as in dicated by the arrows and is illustrated being pre-formed with the pressure-sensitive adhesive material 14.
  • Fig. 4 shows a perspective view of a part of a leading edge of a wind turbine rotor blade 30, the protective cover sheet 12, and the pressure-sensitive adhesive material 14.
  • the wind turbine rotor blade 30 and the protective cover sheet 12 are illustrated similar to fig. 3.
  • the pressure-sensitive material 14 and the protective cover sheet 12 are illustrated as separate elements.
  • the pressure-sensitive material 14 and the protective cover sheet 12 are mounted in the direction of the arrows.
  • Fig. 5 shows a perspective view of a part of a leading edge of a wind turbine rotor blade 30, the protective cover sheet 12, and the vacuum sheet 16.
  • the cover sheet 12 having the pressure-sensitive adhesive material 14 is arranged on the surface of the wind turbine rotor blade 30, and the vacuum sheet 16 is illustrated in a mounting direc tion as indicated by the arrows.
  • the vacuum sheet is connected to a hose 26 of the vacuum system. From the figure, it is obvious that the textured surface pattern 20 of the vacuum sheet 16 will cover the protective cover sheet 12 when being mounted, and the sealing element 18 of the vacuum sheet 16 will engage the surface of the wind turbine rotor blade 30.
  • Fig. 6 shows a perspective view of a part of a leading edge of a wind turbine rotor blade 30, the protective cover sheet 12, and the vacuum sheet 16 being affixed to the wind turbine rotor blade 30.
  • the protective cover sheet 12 is arranged on the wind tur- bine rotor blade 30, and the vacuum sheet 16 is arranged on the protective cover sheet 12 with the sealing element 18 engaging the surface of the wind turbine rotor blade 30.
  • the hose 26 is connected to the opening 22 of the vacuum sheet 16 and may at the other end be attached to a vacuum system (not shown) Fig.
  • FIG. 7 shows a perspective view of a part of a leading edge of a wind turbine rotor blade 30, the protective cover sheet 12, and the vacuum sheet 16 being affixed to the rotor blade 30 and connected to a vacuum pump 24.
  • Figure 7 illustrates a perspective cross-section of the system 10 being arranged to the wind turbine rotor blade 30.
  • Fig. 8 shows a perspective view of a part of a leading edge of a wind turbine rotor blade 30, the protective cover sheet 12 and the vacuum sheet 16 being affixed to the rotor blade 30 and a vacuum activated.
  • the protective cover sheet 12 and the vacuum sheet 16 are arranged on the wind turbine rotor blade and via the hose 26 being connected to a vacuum system (not shown).
  • the vacuum sys- tern“sucks” air 26 out of the sealed chamber between the vacuum sheet 16 and the wind turbine rotor blade 30, creating a vacuum within the chamber which results in a vacuum pressure 38 acting on the protective cover sheet 12.
  • Fig. 9A shows a cross-sectional view of the rotor blade 30, where the protective cover sheet 12 and the vacuum sheet 16 are exposed to vacuum pressure 38. From figure 9A, the arrangement of the wind turbine rotor blade 30, the protective cover sheet 12, and the vacuum sheet 16 is apparent. The vacuum pressure 38, as a result of the vac uum inside the sealed chamber, is illustrated across the top surface of the vacuum sheet, hereby illustrating an evenly distributed vacuum pressure 38 acting towards the protective cover sheet. Figure 9A clearly illustrates the sealing element 18 of the vac- uum sheet 16 engaging the surface of the wind turbine rotor blade 30.
  • Fig. 9B shows a blow-up of the cross-section in fig. 9A. From figure 9B it is apparent that the vacuum sheet 16 is having air-flow channels 40 and projections between the channel, which projections are in abutment with the top surface of the protective cover sheet 12. Upon activation of the vacuum system, the vacuum pressure 38 will act on the protective cover sheet 12 in contact points where the projections of the vacuum sheet 16 abut the protective cover sheet 16. A large number of projections in the tex tures surface pattern 20 will result in an evenly distributed force applied to the top sur face of the protective cover sheet 12.
  • the protective cover sheet 12 and the vacuum sheet 16 are illus trated having a curved shape. This should not be interpreted limiting in any way. Both the protective cover sheet and the vacuum sheet may be arranged as plane sheets. Further, the vacuum sheet is preferably flexible and may be made from a polyolefin material such as polyethylene or other similar material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Wind Motors (AREA)

Abstract

L'invention concerne un système de protection d'un bord d'attaque sur une pale de rotor d'éolienne, une feuille sous vide destinée à être utilisée dans le système et un procédé de protection in situ d'une partie d'un bord d'attaque d'une pale de rotor d'éolienne. Le système comprend une feuille de revêtement de protection destinée à être disposée sur une partie d'un bord d'attaque d'une pale de rotor d'éolienne. La feuille de revêtement de protection a un matériau adhésif sensible à la pression pour lier de manière adhésive la feuille de couverture protectrice à la partie de pale de rotor. Le système comprend en outre une feuille sous vide ayant une surface inférieure texturée et un élément d'étanchéité disposé au niveau d'une circonférence périphérique et approprié pour être relié à une pompe à vide et pour être agencé sur la feuille de couverture protectrice d'une manière entièrement couvrante et chevauchante où l'élément d'étanchéité vient en prise avec la surface de la pale de rotor. La feuille de revêtement de protection est ainsi disposée dans une chambre étanche entre la pale de rotor et la feuille sous vide, et le système à vide crée un vide à l'intérieur de la chambre étanche qui force la surface inférieure texturée contre la feuille de revêtement de protection, qui active le matériau adhésif sensible à la pression.
PCT/IB2018/000309 2018-03-27 2018-03-27 Système de protection d'un bord d'attaque sur une pale de rotor d'éolienne, feuille sous vide destinée à être utilisée dans le système et procédé de protection in situ d'une partie d'un bord d'attaque d'une pale de rotor d'éolienne WO2019186220A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2018/000309 WO2019186220A1 (fr) 2018-03-27 2018-03-27 Système de protection d'un bord d'attaque sur une pale de rotor d'éolienne, feuille sous vide destinée à être utilisée dans le système et procédé de protection in situ d'une partie d'un bord d'attaque d'une pale de rotor d'éolienne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2018/000309 WO2019186220A1 (fr) 2018-03-27 2018-03-27 Système de protection d'un bord d'attaque sur une pale de rotor d'éolienne, feuille sous vide destinée à être utilisée dans le système et procédé de protection in situ d'une partie d'un bord d'attaque d'une pale de rotor d'éolienne

Publications (1)

Publication Number Publication Date
WO2019186220A1 true WO2019186220A1 (fr) 2019-10-03

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PCT/IB2018/000309 WO2019186220A1 (fr) 2018-03-27 2018-03-27 Système de protection d'un bord d'attaque sur une pale de rotor d'éolienne, feuille sous vide destinée à être utilisée dans le système et procédé de protection in situ d'une partie d'un bord d'attaque d'une pale de rotor d'éolienne

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112032006A (zh) * 2020-09-11 2020-12-04 连云港中复连众复合材料集团有限公司 防护装置、叶片和风电机组
CN114131945A (zh) * 2021-11-05 2022-03-04 湖南弘辉科技有限公司 一种高速风机叶片金属包边、包边方法及包边装置

Citations (6)

* Cited by examiner, † Cited by third party
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US5439635A (en) * 1993-02-18 1995-08-08 Scrimp Systems, Llc Unitary vacuum bag for forming fiber reinforced composite articles and process for making same
US20110169190A1 (en) * 2008-06-13 2011-07-14 Lockheed Martin Corporation Vacuum-Assisted Resin Transfer Molding Process with Reusable Resin Distribution Line
WO2014170232A1 (fr) * 2013-04-17 2014-10-23 Lm Wp Patent Holding A/S Procédé de réparation d'une pale de turbine éolienne
WO2015132700A1 (fr) * 2014-03-04 2015-09-11 Bombardier Inc. Procédé et appareillage pour former un empilement de stratifiés composites par utilisation d'un film sous vide en polyéthylène respirant
EP3098438A1 (fr) * 2015-05-28 2016-11-30 MHI Vestas Offshore Wind A/S Pale de turbine éolienne et appareil de génération d'énergie éolienne, procédé de fabrication ou de rattrapage d'une pale d'éolienne
EP3218597A1 (fr) 2014-11-10 2017-09-20 Polytech A/S Matériau de polyuréthane, procédé de préparation d'un tel matériau et couvercle de protection pour éolienne

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5439635A (en) * 1993-02-18 1995-08-08 Scrimp Systems, Llc Unitary vacuum bag for forming fiber reinforced composite articles and process for making same
US20110169190A1 (en) * 2008-06-13 2011-07-14 Lockheed Martin Corporation Vacuum-Assisted Resin Transfer Molding Process with Reusable Resin Distribution Line
WO2014170232A1 (fr) * 2013-04-17 2014-10-23 Lm Wp Patent Holding A/S Procédé de réparation d'une pale de turbine éolienne
WO2015132700A1 (fr) * 2014-03-04 2015-09-11 Bombardier Inc. Procédé et appareillage pour former un empilement de stratifiés composites par utilisation d'un film sous vide en polyéthylène respirant
EP3218597A1 (fr) 2014-11-10 2017-09-20 Polytech A/S Matériau de polyuréthane, procédé de préparation d'un tel matériau et couvercle de protection pour éolienne
EP3098438A1 (fr) * 2015-05-28 2016-11-30 MHI Vestas Offshore Wind A/S Pale de turbine éolienne et appareil de génération d'énergie éolienne, procédé de fabrication ou de rattrapage d'une pale d'éolienne

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112032006A (zh) * 2020-09-11 2020-12-04 连云港中复连众复合材料集团有限公司 防护装置、叶片和风电机组
CN114131945A (zh) * 2021-11-05 2022-03-04 湖南弘辉科技有限公司 一种高速风机叶片金属包边、包边方法及包边装置
CN114131945B (zh) * 2021-11-05 2023-07-25 湖南弘辉科技有限公司 一种高速风机叶片金属包边、包边方法及包边装置

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