GB2062120A - Structural unit for flow- technical apparatuses or machines - Google Patents

Structural unit for flow- technical apparatuses or machines Download PDF

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Publication number
GB2062120A
GB2062120A GB8034111A GB8034111A GB2062120A GB 2062120 A GB2062120 A GB 2062120A GB 8034111 A GB8034111 A GB 8034111A GB 8034111 A GB8034111 A GB 8034111A GB 2062120 A GB2062120 A GB 2062120A
Authority
GB
United Kingdom
Prior art keywords
structural unit
elementary structures
elementary
flow
structures
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Withdrawn
Application number
GB8034111A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SZELLOEZOE MUEVEK
Original Assignee
SZELLOEZOE MUEVEK
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 SZELLOEZOE MUEVEK filed Critical SZELLOEZOE MUEVEK
Publication of GB2062120A publication Critical patent/GB2062120A/en
Withdrawn legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C3/00—Wings
    • B64C3/26—Construction, shape, or attachment of separate skins, e.g. panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/542—Bladed diffusers
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)

Abstract

The structural unit (1) according to the invention is made up from juxtaposed and interconnected elementary structures (2) having at least one surface (4) which from a flow-technical point of view is identical with a part of the final surface (3) of the structural unit (1). The elementary structures may be secured to each other by riveting, adhesives or welding and included internal reinforcing elements, stressed-skin construction, or a foamed synthetic material interior. <IMAGE>

Description

SPECIFICATION Structural unit for flow-technical apparatuses or machines The invention relates to a structural unit for flow-technical apparatuses and machines, having specific shape or profile from an aerodynamic or rheological point of view. Such structural unit may be, for instance, a fan or blower blade or wing. The possibility for application of the invention generally arises in the field of air flow machinery, e.g. pumps, turbines, fans, various flow-guiding devices, ventilating apparatus, aviation engineering and others.
It is known that the structural units of fixed cross-section and shape, as for instance the various fan wings or turbine blades are difficult to produce in large sizes. If the wing of a blower or fan used in cooling towers is taken as an example, evidently its production assuring the optimal shape of the wing from an aerodynamic point of view will be extremely difficult. In the case of smaller machines such structural units are machined from solid material, or a rough piece will be produced, for instance, by metal casting. In case of larger structural units a lattice frame is first made and is then provided with a surface coveriny sheet or plate.
This latter method is used particularly in the production of the wings of aeroplanes.
No matter which production method is taken as example, the correct shape can be attained only with complicated technology, low productivity high labour input, and consequently at high cost.
The invention is aimed at simplification, standardisation and application of the size series principle, in the production of structural units in flow-technical apparatuses or machines having specific shapes from a rheological point of view.
The aim of the invention is sought to be attained by the structural unit being itself built up from elementary structures (elements) provided with predetermined external surfaces, which in their juxtaposition form the final surface of the structural unit. Applying suitable "family" (size series) principles, structural units of varying shape and size can be assembled from a stock of sets of elementaty structures.
A connection of the elementary structures to each other can be realised either with releasable jointing elements, or with non-releasable (permanent) jointing elements. Generally, jointing by adhesive bonding or welding is preferred. Also riveting may be considered, or fixing with inter connecting pieces, such as grooves and matching counterpieces, engaging pins, or engaging strips.
The material of the elementary structures may be metal, synthetic materials e.g. semi-finished products of metal and synthetic materials of varying cross-section; wood; foamed plastics.
The elementary structures may be simple stressed-skin structures, or may be provided with internal reinforcement; elementary structures filled in, for instance, with foamed synthetic material may also be used. The elementary structures may be formed from extruded, drawn or pressed semi-finished products, e.g. by cutting.
Thus, a structural unit according to the invention comprises interconnected elementary structures each of which has at least one surface which from a flow-technical point of view is identical with a part of the final surface of the structural unit.
Each elementary structure according to the invention may be regarded as a part derived from cutting up the final structural unit. Accordingly, in the majority of cases each elementary structure has two surfaces which will form part of the final surface of the structural unit to be assembled.
Naturally, the surface of the prefabricated elementary structure will not be suitable in every case for the intended structural unit and the final surface will have to be provided with some kind of cover, e.g. by coating, painting, lacquering, etc.
From the flow-technical point of view however, at least one surface of the prefabricated elementary structures shall form part of the surface of the final structural unit.
The structural unit according to the invention is described, purely by way of example, with reference to the accompanying diagrammatic drawing, Illustrating a structural unit in the form of a fan wing, and wherein: Figure 1 illustrates the profile of the wing, Figure 2 illustrates the ventilator wing divided into elementary structures, Figure 3 is an embodiment of an elementary structure of the structural unit, shown in crosssection, Figure 4 is a cross-section of another embodiment of an elementary structure, and Figure 5 is a section of a further embodiment of the elementary structure.
The fan or ventilator wing 1 has an external contour defined by surface 3. The surface 3 determines the profile essential from an aerodynamic or flow-technical point of view. The ventilator wing 1 in Figure 2 is divided into five elementary structures 2. The elementary structures 2 may be prefabricated individually and when suitably interconnected will give the aerofoil or wing shape shown in Figure 1. At least one surface 4 of each elementary structure shall form part of the aerodynamically decisive or important whole surface of the wing 1 as the structural unit.
The elementary structures 2 may be formed from shell or stressed-skin structures, as shown in Figure 3. For jointing of the stressed-skin structures flanges 5 are used, along which the adjacent elementary structures 2 can be bonded or welded together, or possibly fastened by rivets. Surfaces 4 of the elementary structures 2 jointly determine the aerodynamically important surface of the wing 1, although the surfaces 4 - following the jointing of the elementary structures 2 - will be provided with some kind of covering layer.
Figure 4 shows an elementary structure in which reinforcing elements in the form of curved internal ribs and straight ribs 6 are used. These elementary structures 2 are also fitted together by way of flanges 5, along which the jointing of the elementary structures may be assured.
Figure 5 illustrates an elementary structure 2 the interior of which is of foamed synthetic material 7. In connection with this embodiment a method of fastening the elementary structures is different: a groove 8 is formed on one of the elementary structures, while the adjacent elementary structure is provided with a counterpiece (not shown) complementary in shape to that of the groove 8. Said counterpiece may consist of one or several projections.
Forming families or dimensionally related sets of elementary structures 2 is readily achievable with this invention, for the purpose of allowing the assembly of structural units of varying size and shape from the different elementary structures 2.
In this way, a large number of structural units can be produced, differing from each other both in respect of profile (shape) and size. By a suitable application of the mentioned family principle even embodiments twisted along one of the axes of the structural unit may be produced.

Claims (7)

1. Aerodynamic structural unit for flow machinery having a predetermined shape or profile e.g. a ventilator wing, said unit being made up of juxtaposed and interconnected elementary structures, at least one surface of each of which is flow-technically (aerodynamically) identical or coincident with a part of the final surface of the structural unit.
2. A structural unit as claimed in claim 1, wherein at least some of said elementary structures are provided with internal reinforcement.
3. A structural unit as claimed in claim 1 or 2, wherein the interior of said elementary structures is filled with a space-filling material, e.g. foamed synthetic material.
4. A structural unit as claimed in any preceding claim, wherein the elementary structures are fastened to each other by adhesive bonding or welding.
5. A structural unit as claimed in any preceding claim, wherein the elementary structures are provided with interengageable, complementary recess(es) and projection(s).
6. A structural unit according to claim 1, substantially as herein described with reference to Figures 1 and 2, in combination with Figure 3 or Figure 4 or Figure 5 of the accompanying drawing.
7. Sets of elementary structures of varying shapes and sizes interconnectable to form aerodynamic structural units according to any preceding claim.
GB8034111A 1979-10-25 1980-10-22 Structural unit for flow- technical apparatuses or machines Withdrawn GB2062120A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU79SE1961A HU178353B (en) 1979-10-25 1979-10-25 Wing or blade composed from parts for fans or fanlike machines

Publications (1)

Publication Number Publication Date
GB2062120A true GB2062120A (en) 1981-05-20

Family

ID=11001489

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8034111A Withdrawn GB2062120A (en) 1979-10-25 1980-10-22 Structural unit for flow- technical apparatuses or machines

Country Status (8)

Country Link
BE (1) BE885857A (en)
DE (1) DE3040170A1 (en)
FR (1) FR2468067A1 (en)
GB (1) GB2062120A (en)
HU (1) HU178353B (en)
LU (1) LU82849A1 (en)
NL (1) NL8005761A (en)
SE (1) SE8007449L (en)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061567A2 (en) * 1981-04-01 1982-10-06 Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung Aerodynamic propeller blade and manufacturing process
FR2527681A1 (en) * 1982-06-01 1983-12-02 Plastluefter & Anlagenbau Veb BLADE FOR MOBILE WHEELS OF ROTARY-OPERATING MACHINE
EP0095807A2 (en) * 1982-05-27 1983-12-07 Multinorm B.V. Windmill, rotor, rotor blade and mast for the same and method of manufacturing said rotor blade
FR2542645A1 (en) * 1983-03-15 1984-09-21 Cabrol Lucien Method for producing a support structure for an aircraft, and the structure obtained
EP0591194A4 (en) * 1990-07-27 1993-05-11 Marley Cooling Tower Co Fan blade having abrasion resistant leading edge.
FR2782306A1 (en) * 1998-08-13 2000-02-18 Deutsch Zentr Luft & Raumfahrt AERODYNAMIC COMPLEX WITH SUPPORTING SURFACE AND METHOD FOR THE PRODUCTION THEREOF
US6328261B1 (en) * 1997-06-20 2001-12-11 Bae Systems Plc Friction welding metal components
WO2004111392A1 (en) * 2003-06-18 2004-12-23 Siemens Aktiengesellschaft Blade and gas turbine
WO2008009270A2 (en) * 2006-07-20 2008-01-24 Mtu Aero Engines Gmbh Method for repairing a guide blade segment for a jet engine
WO2008071195A3 (en) * 2006-12-15 2008-11-20 Univ Denmark Tech Dtu Reinforced aerodynamic profile
WO2009101226A1 (en) * 2008-02-11 2009-08-20 Isidro Bocanegra Marquina Extruded modular blade
GB2463250A (en) * 2008-09-04 2010-03-10 Vestas Wind Sys As A wind turbine blade formed from welded thermoplastic sections
WO2011126568A1 (en) * 2010-04-05 2011-10-13 Moore Fans Llc Commercial air cooled apparatuses incorporating axial flow fans comprising super low noise fan blades
WO2012001147A1 (en) * 2010-07-01 2012-01-05 Lm Glasfiber A/S Wind turbine blade for a rotor of a wind turbine
WO2013083481A1 (en) * 2011-12-08 2013-06-13 Wobben Properties Gmbh Rear casing, rotor blade with rear casing, and a wind turbine that comprises such a rotor blade
US8485786B2 (en) 2007-01-16 2013-07-16 Bladena Aps Reinforced blade for wind turbine
US8632312B2 (en) 2007-01-25 2014-01-21 Bladena Aps Reinforced blade for wind turbine
US8807953B2 (en) 2008-06-24 2014-08-19 Bladena Aps Reinforced wind turbine blade
EP2801437A3 (en) * 2013-05-08 2014-12-17 AB Akron-Maskiner Blades for axial flow machines and a method to manufacture such blades
US9416768B2 (en) 2009-12-02 2016-08-16 Bladena Aps Reinforced airfoil shaped body
EP2637923B1 (en) * 2010-11-12 2019-01-02 Airbus Operations GmbH Structural element for an aircraft and/or spacecraft and method for producing such a structural element
CN110966047A (en) * 2018-09-28 2020-04-07 通用电气公司 Airfoil with leading edge guard

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4315600C2 (en) * 1993-05-11 1996-07-25 Daimler Benz Aerospace Airbus Support structure for an aerodynamic surface
DE4437102A1 (en) * 1994-10-18 1996-04-25 Andreas Blakkolb Model helicopter with rotor and production tool

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH448130A (en) * 1966-05-16 1967-12-15 Escher Wyss Ag Blade for steam or gas turbine
DE1628278A1 (en) * 1966-06-16 1971-03-18 Helios Appbau Kg Mueller & Co Process for the production of fan blades
GB1141270A (en) * 1966-12-30 1969-01-29 Edgar Allen Aerex Ltd Improvements in or relating to air-moving fans, e.g. for cooling towers
GB1218021A (en) * 1967-05-11 1971-01-06 Rolls Royce Improvements in flow directing blades
DD100058A1 (en) * 1972-10-12 1980-10-01 Shovels for axial fans and method of making these blades
US3938962A (en) * 1974-04-04 1976-02-17 Weston H. Feilbach Laminated composite wear materials

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061567A2 (en) * 1981-04-01 1982-10-06 Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung Aerodynamic propeller blade and manufacturing process
EP0061567A3 (en) * 1981-04-01 1984-09-26 Messerschmitt-Bolkow-Blohm Gesellschaft Mit Beschrankter Haftung Aerodynamic propeller blade and manufacturing process
EP0095807A2 (en) * 1982-05-27 1983-12-07 Multinorm B.V. Windmill, rotor, rotor blade and mast for the same and method of manufacturing said rotor blade
EP0095807A3 (en) * 1982-05-27 1985-08-14 Multinorm B.V. Windmill, rotor, rotor blade and mast for the same and method of manufacturing said rotor blade
FR2527681A1 (en) * 1982-06-01 1983-12-02 Plastluefter & Anlagenbau Veb BLADE FOR MOBILE WHEELS OF ROTARY-OPERATING MACHINE
FR2542645A1 (en) * 1983-03-15 1984-09-21 Cabrol Lucien Method for producing a support structure for an aircraft, and the structure obtained
EP0591194A4 (en) * 1990-07-27 1993-05-11 Marley Cooling Tower Co Fan blade having abrasion resistant leading edge.
EP0591194A1 (en) * 1990-07-27 1994-04-13 The Marley Cooling Tower Company Fan blade having abrasion resistant leading edge
US6328261B1 (en) * 1997-06-20 2001-12-11 Bae Systems Plc Friction welding metal components
FR2782306A1 (en) * 1998-08-13 2000-02-18 Deutsch Zentr Luft & Raumfahrt AERODYNAMIC COMPLEX WITH SUPPORTING SURFACE AND METHOD FOR THE PRODUCTION THEREOF
WO2004111392A1 (en) * 2003-06-18 2004-12-23 Siemens Aktiengesellschaft Blade and gas turbine
WO2008009270A3 (en) * 2006-07-20 2008-03-06 Mtu Aero Engines Gmbh Method for repairing a guide blade segment for a jet engine
WO2008009270A2 (en) * 2006-07-20 2008-01-24 Mtu Aero Engines Gmbh Method for repairing a guide blade segment for a jet engine
WO2008071195A3 (en) * 2006-12-15 2008-11-20 Univ Denmark Tech Dtu Reinforced aerodynamic profile
CN101646865B (en) * 2006-12-15 2013-01-09 布拉德纳公司 Reinforced aerodynamic profile
US8454318B2 (en) 2006-12-15 2013-06-04 Bladena Aps Reinforced aerodynamic profile
US8485786B2 (en) 2007-01-16 2013-07-16 Bladena Aps Reinforced blade for wind turbine
US8632312B2 (en) 2007-01-25 2014-01-21 Bladena Aps Reinforced blade for wind turbine
WO2009101226A1 (en) * 2008-02-11 2009-08-20 Isidro Bocanegra Marquina Extruded modular blade
ES2332973A1 (en) * 2008-02-11 2010-02-15 Isidro Bocanegra Marquina Extruded modular blade
US9784240B2 (en) 2008-06-24 2017-10-10 Bladena Solutions Aps Reinforced wind turbine blade
US8807953B2 (en) 2008-06-24 2014-08-19 Bladena Aps Reinforced wind turbine blade
GB2463250A (en) * 2008-09-04 2010-03-10 Vestas Wind Sys As A wind turbine blade formed from welded thermoplastic sections
US9416768B2 (en) 2009-12-02 2016-08-16 Bladena Aps Reinforced airfoil shaped body
CN102947595A (en) * 2010-04-05 2013-02-27 穆尔风扇有限责任公司 Commercial air cooled apparatuses incorporating axial flow fans comprising super low noise fan blades
AU2011238913B2 (en) * 2010-04-05 2015-08-13 Moore Fans Llc Commercial air cooled apparatuses incorporating axial flow fans comprising Super Low Noise fan blades
JP2013524091A (en) * 2010-04-05 2013-06-17 ムーア ファンズ リミティド ライアビリティ カンパニー Commercial air cooling device with axial fan with ultra-low noise fan blades
WO2011126568A1 (en) * 2010-04-05 2011-10-13 Moore Fans Llc Commercial air cooled apparatuses incorporating axial flow fans comprising super low noise fan blades
US8851851B2 (en) 2010-04-05 2014-10-07 Moore Fans Llc Super low noise fan blades, axial flow fans incorporating the same, and commercial air cooled apparatuses incorporating such axial flow fans
CN102947595B (en) * 2010-04-05 2016-10-12 穆尔风扇有限责任公司 Commercial air chiller including the aerofoil fan comprising super low noise fan blade
US10107258B2 (en) 2010-07-01 2018-10-23 Lm Glasfiber A/S Wind turbine blade for a rotor of a wind turbine
WO2012001147A1 (en) * 2010-07-01 2012-01-05 Lm Glasfiber A/S Wind turbine blade for a rotor of a wind turbine
EP2637923B1 (en) * 2010-11-12 2019-01-02 Airbus Operations GmbH Structural element for an aircraft and/or spacecraft and method for producing such a structural element
AU2012348662B2 (en) * 2011-12-08 2016-05-19 Wobben Properties Gmbh Rear casing, rotor blade with rear casing, and a wind turbine that comprises such a rotor blade
KR101678752B1 (en) 2011-12-08 2016-11-23 보벤 프로퍼티즈 게엠베하 Rear casing, rotor blade with rear casing, and a wind turbine that comprises such a rotor blade
KR20140105533A (en) * 2011-12-08 2014-09-01 보벤 프로퍼티즈 게엠베하 Rear casing, rotor blade with rear casing, and a wind turbine that comprises such a rotor blade
US9897070B2 (en) 2011-12-08 2018-02-20 Wobben Properties Gmbh Rear casing, rotor blade with rear casing, and a wind turbine that comprises such a rotor blade
WO2013083481A1 (en) * 2011-12-08 2013-06-13 Wobben Properties Gmbh Rear casing, rotor blade with rear casing, and a wind turbine that comprises such a rotor blade
EP2801437A3 (en) * 2013-05-08 2014-12-17 AB Akron-Maskiner Blades for axial flow machines and a method to manufacture such blades
CN110966047A (en) * 2018-09-28 2020-04-07 通用电气公司 Airfoil with leading edge guard
US11454121B2 (en) 2018-09-28 2022-09-27 General Electric Company Airfoil with leading edge guard

Also Published As

Publication number Publication date
SE8007449L (en) 1981-04-26
BE885857A (en) 1981-02-16
HU178353B (en) 1982-04-28
NL8005761A (en) 1981-04-28
LU82849A1 (en) 1981-02-02
FR2468067A1 (en) 1981-04-30
DE3040170A1 (en) 1981-05-07

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)