[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO1997039243A1 - Vane element - Google Patents

Vane element Download PDF

Info

Publication number
WO1997039243A1
WO1997039243A1 PCT/SE1997/000591 SE9700591W WO9739243A1 WO 1997039243 A1 WO1997039243 A1 WO 1997039243A1 SE 9700591 W SE9700591 W SE 9700591W WO 9739243 A1 WO9739243 A1 WO 9739243A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor blade
ring
opening
fibres
base
Prior art date
Application number
PCT/SE1997/000591
Other languages
French (fr)
Inventor
Karl-Otto Strömberg
Original Assignee
ABB Fläkt AB
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 ABB Fläkt AB filed Critical ABB Fläkt AB
Priority to AT97919846T priority Critical patent/ATE229621T1/en
Priority to SK1421-98A priority patent/SK142198A3/en
Priority to DE69717802T priority patent/DE69717802D1/en
Priority to AU24185/97A priority patent/AU2418597A/en
Priority to EP97919846A priority patent/EP0894197B1/en
Priority to HU9901657A priority patent/HU221148B1/en
Priority to PL97329393A priority patent/PL182614B1/en
Priority to EE9800332A priority patent/EE9800332A/en
Publication of WO1997039243A1 publication Critical patent/WO1997039243A1/en
Priority to BG102834A priority patent/BG62899B1/en
Priority to NO984857A priority patent/NO984857L/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/02Selection of particular materials
    • F04D29/023Selection of particular materials especially adapted for elastic fluid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/32Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38Blades
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00Materials; Properties thereof
    • F05D2300/40Organic materials
    • F05D2300/43Synthetic polymers, e.g. plastics; Rubber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00Materials; Properties thereof
    • F05D2300/60Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/603Composites; e.g. fibre-reinforced
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00Materials; Properties thereof
    • F05D2300/60Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/603Composites; e.g. fibre-reinforced
    • F05D2300/6034Orientation of fibres, weaving, ply angle

Definitions

  • the present invention relates to a rotor blade to be attached to a hub in a rotor, such as a vane to be attached to a hub of a fan.
  • Fan blades are usually made of metal, for instance steel or aluminium. There is today a need of manufactur ⁇ ing fan blades of a material which is more chemically resistant than metal and consequently can resist a chemi ⁇ cally aggressive environment in a better manner than metal, for instance in the chemical process industry. There is also a need of making the fan blades lighter, which means that the fan on which the blades are mounted can be operated at higher speeds, and that in some cases the fan can be made smaller and thus less expensive. Attempts have therefore been made to manufacture fan blades of composite material of fibre-reinforced plastic. These fan blades are chemically resistant and light, but it has proved difficult to fasten them to a hub of a fan in a satisfactory manner.
  • connection between blade and hub usually is a bolt connection with bolts, which extend through the base of the blade and are screwed into the hub or a holder arranged thereon.
  • bolts which extend through the base of the blade and are screwed into the hub or a holder arranged thereon.
  • the fan blades made of composite material tend to be destroyed at high speeds of the fan and thus great stress since cracks arise in the base of the blade in the area of the bolt connection.
  • a specific object of the present invention therefore is to provide a fan blade, which has the desired proper ⁇ ties and besides can be attached to a hub of a fan in a satisfactory manner.
  • a more general object of the invention is to provide a rotor blade, which has the desired properties and can be attached to a hub in a rotor without breaking at high rotor speeds and when subjected to great stress.
  • a rotor blade which is characterised in that the rotor blade is made essentially of a composit-e material of fibre-reinforced plastic, that the base of the rotor blade comprises a metal ring with means for attaching the rotor blade to the hub, said ring having an opening, which has a cross-sectional area increasing in the direction away from the rotor blade, that a rigid reinforcing element is ar ⁇ ranged in the opening of the ring, and that the composite material extends into the ring, reinforcing fibres in the base of the rotor blade extending into the opening of the ring between the reinforcing element and the wall of the opening essentially in parallel therewith.
  • the opening of the ring has the form of a truncated cone.
  • the reinforcing element suitably contains carbon fibres and, in a preferred embodiment, is formed of a carbon-fibre strand, which is rolled into a disk-shaped roll and which during manufacture of the rotor blade in a mould is arranged in the opening of the ring to press the reinforcing fibres in the opening in the direction of the wall of the opening.
  • the composition of the composite material of fibres and plastic in the base of the rotor blade is preferably selected such that the composite material therein has a linear expansion characteristic adapted to the metal ring.
  • the composite material suitably is glass-fibre reinforced epoxy plastic.
  • the glass-fibre reinforcement in the base of the rotor blade is supple ⁇ mented with a carbon-fibre reinforcement with carbon fibres, which extend substantially transversely of the glass fibres in the glass-fibre reinforcement in the base.
  • Fig. 1 is a side view of a fan blade according to the present invention
  • Fig. 2 is a top plan view of the fan blade
  • Fig. 3 is a sectional view of the fan blade along the line III-III in Fig. 1, and Fig. 4 corresponds to Fig. 3, but. shows the base por ⁇ tion of the fan blade on a larger scale.
  • FIG. 1 illustrates a fan blade 1, which is to be attached to a hub (not shown) in a fan (not shown) by means of four fixing bolts (not shown) , which are to be screwed into the hub or a holder arranged thereon.
  • the blade 1 is made of a composite material of fibre- reinforced plastic.
  • the compos ⁇ ite material is a glass- and carbon-fibre reinforced epoxy plastic.
  • other fibres than glass fibres and carbon fibres e.g. aramide fibres, can be used as fibre reinforcement.
  • other polymers than epoxy plastic can be used as a matrix.
  • two mats, each consisting of several layers of oriented glass fibres, and an intermediate plastic core 2 (Fig. 4) are placed in a mould, whereupon a circular ring 3 of metal, e.g. steel, is arranged in the mould at one end thereof.
  • the ring 3 has an opening 4 which is conical in a truncated manner and is of a cross-sectional area increasing in the direc ⁇ tion away from the mould.
  • the glass fibres at the end of the mats closest to the ring 3 (this end constituting the base end of the completed blade 1) are introduced into the opening 4 of the ring 3 and are pressed against the wall of the opening 4.
  • a "bundle" of glass fibres is arranged in the pointed portion A, indicated by dashed lines in Fig. 4, between the mat glass fibres pressed against the wall of the opening 4.
  • a carbon-fibre strand which is rolled into a disk-shaped roll and which is to form a rigid reinforcing element 5 in the completed blade 1, is arranged in the opening 4 of the ring 3 on the outside of the bundle of glass fibres in order to retain the glass fibres in the position when pressed in the direction of the wall of the opening 4.
  • the mould is closed, whereupon epoxy plastic is injected so as to form the blade 1.
  • the completed blade 1 thus consists of a composite material 6 (including the area A) of glass-fibre rein ⁇ forced epoxy plastic and having a core 2 of plastic and a reinforcing element 5 in the form of a carbon-fibre/epoxy- plastic composite.
  • the base of the blade 1 consists of the metal ring 3, the reinforcing element 5 and that part of the composite material 6 which is located in the opening 4 of the ring 3 and in which the glass fibres extend conically along the wall of the opening 4 between the wall and the reinforcing element 5, which prevents the glass fibres in the ring 3 from being pressed towards the centre of the ring when the blade 1 is subjected to great stress, and the body of the blade from being pulled out of the ring 3.
  • the ring 3 has a bolt hole 7 for each fixing bolt.
  • the blade 1 is attached to a hub by means of the fixing bolts, which are inserted into the holes 7 in the ring 3 and screwed into the hub or a holder ar ⁇ ranged thereon.
  • the above-described fan blade 1 is light compared with previously used metal blades, and besides it has appeared to withstand high speeds of the fan without its base breaking adjacent to the bolt connection.
  • composition of fibres and plastic in the compos ⁇ ite material 6 in the blade base is selected such that the composite material therein has a linear expansion charac ⁇ teristic which is adapted to the metal ring 3, thereby reducing as much as possible the effects of the expansion and contraction of the ring under various temperature conditions, i.e. such that the composite material is able to follow the ring 3 in the temperature-dependent move ⁇ ments thereof.
  • the glass-fibre reinforcemei in the blade base is, in a preferred embodiment of the I -a blade 1, supplemented with a carbon-fibre reinforcement with carbon fibres, which in the manufacture of the blade in the mould are arranged among the glass fibres in the area of the ring 3 so as to extend in the completed blade 1 substantially transversely of these glass fibres in the composite material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
  • Supercharger (AREA)
  • Eye Examination Apparatus (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Thermistors And Varistors (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Surgical Instruments (AREA)
  • Glass Compositions (AREA)
  • Transplanting Machines (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

A rotor blade to be attached to a hub in a rotor, such as a vane (1) to be attached to a hub of a fan, is made essentially of a composite material (6) of fibre-reinforced plastic. The base of the rotor blade comprises a metal ring (3) with means for attachment of the rotor blade to the hub. The ring (3) has an opening (4), which has a cross-sectional area increasing in the direction away from the rotor blade. A rigid reinforcing element (5) is arranged in the opening (4), and the composite material (6) extends into the ring (3) such that reinforcing fibres in the base of the rotor blade extend into the opening (4) between the reinforcing element (5) and the wall of the opening (4) essentially in parallel therewith.

Description

VANE ELEMENT
The present invention relates to a rotor blade to be attached to a hub in a rotor, such as a vane to be attached to a hub of a fan.
Fan blades are usually made of metal, for instance steel or aluminium. There is today a need of manufactur¬ ing fan blades of a material which is more chemically resistant than metal and consequently can resist a chemi¬ cally aggressive environment in a better manner than metal, for instance in the chemical process industry. There is also a need of making the fan blades lighter, which means that the fan on which the blades are mounted can be operated at higher speeds, and that in some cases the fan can be made smaller and thus less expensive. Attempts have therefore been made to manufacture fan blades of composite material of fibre-reinforced plastic. These fan blades are chemically resistant and light, but it has proved difficult to fasten them to a hub of a fan in a satisfactory manner. The connection between blade and hub usually is a bolt connection with bolts, which extend through the base of the blade and are screwed into the hub or a holder arranged thereon. Regrettably, it has been found that the fan blades made of composite material tend to be destroyed at high speeds of the fan and thus great stress since cracks arise in the base of the blade in the area of the bolt connection.
A specific object of the present invention therefore is to provide a fan blade, which has the desired proper¬ ties and besides can be attached to a hub of a fan in a satisfactory manner. A more general object of the invention is to provide a rotor blade, which has the desired properties and can be attached to a hub in a rotor without breaking at high rotor speeds and when subjected to great stress.
According to the invention, this object is achieved by a rotor blade, which is characterised in that the rotor blade is made essentially of a composit-e material of fibre-reinforced plastic, that the base of the rotor blade comprises a metal ring with means for attaching the rotor blade to the hub, said ring having an opening, which has a cross-sectional area increasing in the direction away from the rotor blade, that a rigid reinforcing element is ar¬ ranged in the opening of the ring, and that the composite material extends into the ring, reinforcing fibres in the base of the rotor blade extending into the opening of the ring between the reinforcing element and the wall of the opening essentially in parallel therewith.
In a preferred embodiment, the opening of the ring has the form of a truncated cone.
The reinforcing element suitably contains carbon fibres and, in a preferred embodiment, is formed of a carbon-fibre strand, which is rolled into a disk-shaped roll and which during manufacture of the rotor blade in a mould is arranged in the opening of the ring to press the reinforcing fibres in the opening in the direction of the wall of the opening.
The composition of the composite material of fibres and plastic in the base of the rotor blade is preferably selected such that the composite material therein has a linear expansion characteristic adapted to the metal ring. The composite material suitably is glass-fibre reinforced epoxy plastic. In a preferred embodiment, the glass-fibre reinforcement in the base of the rotor blade is supple¬ mented with a carbon-fibre reinforcement with carbon fibres, which extend substantially transversely of the glass fibres in the glass-fibre reinforcement in the base. The invention will now be described in more detail with reference to the accompanying drawings, in which
Fig. 1 is a side view of a fan blade according to the present invention, Fig. 2 is a top plan view of the fan blade,
Fig. 3 is a sectional view of the fan blade along the line III-III in Fig. 1, and Fig. 4 corresponds to Fig. 3, but. shows the base por¬ tion of the fan blade on a larger scale.
The drawings illustrate a fan blade 1, which is to be attached to a hub (not shown) in a fan (not shown) by means of four fixing bolts (not shown) , which are to be screwed into the hub or a holder arranged thereon.
The blade 1 is made of a composite material of fibre- reinforced plastic. In a preferred embodiment, the compos¬ ite material is a glass- and carbon-fibre reinforced epoxy plastic. However, it will be appreciated that other fibres than glass fibres and carbon fibres, e.g. aramide fibres, can be used as fibre reinforcement. It will also be appre¬ ciated that other polymers than epoxy plastic can be used as a matrix. In the manufacture of the blade 1, two mats, each consisting of several layers of oriented glass fibres, and an intermediate plastic core 2 (Fig. 4) are placed in a mould, whereupon a circular ring 3 of metal, e.g. steel, is arranged in the mould at one end thereof. The ring 3 has an opening 4 which is conical in a truncated manner and is of a cross-sectional area increasing in the direc¬ tion away from the mould. The glass fibres at the end of the mats closest to the ring 3 (this end constituting the base end of the completed blade 1) are introduced into the opening 4 of the ring 3 and are pressed against the wall of the opening 4. A "bundle" of glass fibres is arranged in the pointed portion A, indicated by dashed lines in Fig. 4, between the mat glass fibres pressed against the wall of the opening 4. A carbon-fibre strand, which is rolled into a disk-shaped roll and which is to form a rigid reinforcing element 5 in the completed blade 1, is arranged in the opening 4 of the ring 3 on the outside of the bundle of glass fibres in order to retain the glass fibres in the position when pressed in the direction of the wall of the opening 4. The mould is closed, whereupon epoxy plastic is injected so as to form the blade 1. The completed blade 1 thus consists of a composite material 6 (including the area A) of glass-fibre rein¬ forced epoxy plastic and having a core 2 of plastic and a reinforcing element 5 in the form of a carbon-fibre/epoxy- plastic composite.
The base of the blade 1 consists of the metal ring 3, the reinforcing element 5 and that part of the composite material 6 which is located in the opening 4 of the ring 3 and in which the glass fibres extend conically along the wall of the opening 4 between the wall and the reinforcing element 5, which prevents the glass fibres in the ring 3 from being pressed towards the centre of the ring when the blade 1 is subjected to great stress, and the body of the blade from being pulled out of the ring 3. The ring 3 has a bolt hole 7 for each fixing bolt. As mentioned above, the blade 1 is attached to a hub by means of the fixing bolts, which are inserted into the holes 7 in the ring 3 and screwed into the hub or a holder ar¬ ranged thereon. The above-described fan blade 1 is light compared with previously used metal blades, and besides it has appeared to withstand high speeds of the fan without its base breaking adjacent to the bolt connection.
The composition of fibres and plastic in the compos¬ ite material 6 in the blade base is selected such that the composite material therein has a linear expansion charac¬ teristic which is adapted to the metal ring 3, thereby reducing as much as possible the effects of the expansion and contraction of the ring under various temperature conditions, i.e. such that the composite material is able to follow the ring 3 in the temperature-dependent move¬ ments thereof. To this end, the glass-fibre reinforcemei in the blade base is, in a preferred embodiment of the I -a blade 1, supplemented with a carbon-fibre reinforcement with carbon fibres, which in the manufacture of the blade in the mould are arranged among the glass fibres in the area of the ring 3 so as to extend in the completed blade 1 substantially transversely of these glass fibres in the composite material.

Claims

1. A rotor blade to be attached to a hub in a rotor, such as a vane (1) to be attached to a hub of a fan, c h a r a c t e r i s e d in that the rotor blade is made essentially of a composite material (6) of fibre- reinforced plastic, that the base of the rotor blade com¬ prises a metal ring (3) with means (7) for attaching the rotor blade to the hub, said ring having an opening (4), which has a cross-sectional area increasing in the direc¬ tion away from the rotor blade, that a rigid reinforcing element (5) is arranged in the opening (4) of the ring (3) , and that the composite material (6) extends into the ring, reinforcing fibres in the base of the rotor blade extending into the opening (4) of the ring (3) between the reinforcing element (5) and the wall of the opening
(4) essentially in parallel therewith.
2. A rotor blade as claimed in claim 1, c h a r - a c t e r i s e d in that the opening (4) of the ring (3) has the form of a truncated cone.
3. A rotor blade as claimed in claim 1 or 2, c h a r a c t e r i s e d in that the reinforcing element
(5) contains carbon fibres.
4. A rotor blade as claimed in claim 3, c h a r ¬ a c t e r i s e d in that the reinforcing element (5) is formed of a carbon-fibre strand, which is rolled into a disk-shaped roll and which during manufacture of the rotor blade in a mould is arranged in the opening (4) of the ring (3) to press the reinforcing fibres in the open¬ ing in the direction of the wall of the opening.
5. A rotor blade as claimed in any one of claims 1- 4, c h a r a c t e r i s e d in that the composition of the composite material (6) of fibres and plastic in the base of the rotor blade is selected such that the compos¬ ite material therein has a linear expansion characteris¬ tic adapted to the metal ring (3) .
6. A rotor blade as claimed in -any one of claims 1- 5, c h a r a c t e r i s e d in that the composite mate¬ rial (6) is a glass-fibre reinforced epoxy plastic.
7. A rotor blade as claimed in claims 5 and 6, c h a r a c t e r i s e d in that the glass-fibre rein¬ forcement in the base of the rotor blade is supplemented with a carbon-fibre reinforcement with carbon fibres, which extend substantially transversely of the glass fibres in the glass-fibre reinforcement in the base.
PCT/SE1997/000591 1996-04-17 1997-04-10 Vane element WO1997039243A1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
AT97919846T ATE229621T1 (en) 1996-04-17 1997-04-10 WING ELEMENT
SK1421-98A SK142198A3 (en) 1996-04-17 1997-04-10 Vane element
DE69717802T DE69717802D1 (en) 1996-04-17 1997-04-10 WING ELEMENT
AU24185/97A AU2418597A (en) 1996-04-17 1997-04-10 Vane element
EP97919846A EP0894197B1 (en) 1996-04-17 1997-04-10 Vane element
HU9901657A HU221148B1 (en) 1996-04-17 1997-04-10 Vane element
PL97329393A PL182614B1 (en) 1996-04-17 1997-04-10 Vane
EE9800332A EE9800332A (en) 1996-04-17 1997-04-10 Rotors good
BG102834A BG62899B1 (en) 1996-04-17 1998-10-12 Fan blade
NO984857A NO984857L (en) 1996-04-17 1998-10-16 Rotor blade

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9601452-7 1996-04-17
SE9601452A SE506358C2 (en) 1996-04-17 1996-04-17 Rotor blade for attaching to a hub of a rotor, such as a vane for attaching to a fan hub

Publications (1)

Publication Number Publication Date
WO1997039243A1 true WO1997039243A1 (en) 1997-10-23

Family

ID=20402223

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1997/000591 WO1997039243A1 (en) 1996-04-17 1997-04-10 Vane element

Country Status (15)

Country Link
EP (1) EP0894197B1 (en)
AT (1) ATE229621T1 (en)
AU (1) AU2418597A (en)
BG (1) BG62899B1 (en)
CZ (1) CZ287302B6 (en)
DE (1) DE69717802D1 (en)
EE (1) EE9800332A (en)
HU (1) HU221148B1 (en)
NO (1) NO984857L (en)
PL (1) PL182614B1 (en)
RU (1) RU2172434C2 (en)
SE (1) SE506358C2 (en)
SK (1) SK142198A3 (en)
TR (1) TR199802076T2 (en)
WO (1) WO1997039243A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170218969A1 (en) * 2014-07-31 2017-08-03 Ksb Aktiengesellschaft Flow-Conducting Component

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2869258B1 (en) * 2004-04-27 2006-07-21 Hurel Hispano Sa METHOD FOR MANUFACTURING ELEMENTS, SUCH AS FLANGES FOR CASCADES OF PUSHED INVERTER, BY MOLDING COMPOSITE MATERIAL
RU2382910C1 (en) * 2008-11-18 2010-02-27 Федеральное государственное унитарное предприятие "Центральный институт авиационного моторостроения имени П.И. Баранова" Compressor impeller
US9895840B2 (en) 2014-05-15 2018-02-20 The Boeing Company Thermoformed cascades for jet engine thrust reversers
RU2697001C1 (en) * 2015-10-16 2019-08-08 Р.Е.М. Холдинг С.Р.Л. Connecting element for connection of blade to hub of industrial axial fan and blade device containing said connecting element

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3565547A (en) * 1969-02-24 1971-02-23 Carrier Corp Turbomachine rotor construction
FR2427494A1 (en) * 1978-06-01 1979-12-28 Neu Sa Large dia. fan blade - has lengthwise member with plastics honeycomb cores forming leading and trailing edges
US5292231A (en) * 1991-12-31 1994-03-08 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "S.N.E.C.M.A." Turbomachine blade made of composite material
US5458465A (en) * 1993-02-02 1995-10-17 Balck-Durr Aktiengesellschaft Fan impeller

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1592521A1 (en) * 1988-04-26 1990-09-15 Vladislav T Tomashevskij Blade of composite polymeric material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3565547A (en) * 1969-02-24 1971-02-23 Carrier Corp Turbomachine rotor construction
FR2427494A1 (en) * 1978-06-01 1979-12-28 Neu Sa Large dia. fan blade - has lengthwise member with plastics honeycomb cores forming leading and trailing edges
US5292231A (en) * 1991-12-31 1994-03-08 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "S.N.E.C.M.A." Turbomachine blade made of composite material
US5458465A (en) * 1993-02-02 1995-10-17 Balck-Durr Aktiengesellschaft Fan impeller

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DERWENT'S ABSTRACT, No. D0626K/09, Week 8309; & SU,A,922 324, (VOROSHILOVGRADSKII), 23 April 1982. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170218969A1 (en) * 2014-07-31 2017-08-03 Ksb Aktiengesellschaft Flow-Conducting Component
US10393133B2 (en) * 2014-07-31 2019-08-27 Ksb Aktiengesellschaft Flow-conducting component

Also Published As

Publication number Publication date
SE9601452L (en) 1997-10-18
HU221148B1 (en) 2002-08-28
BG102834A (en) 1999-04-30
CZ287302B6 (en) 2000-10-11
EP0894197A1 (en) 1999-02-03
SK142198A3 (en) 1999-06-11
AU2418597A (en) 1997-11-07
PL182614B1 (en) 2002-02-28
NO984857L (en) 1998-12-11
DE69717802D1 (en) 2003-01-23
EE9800332A (en) 1999-04-15
BG62899B1 (en) 2000-10-31
TR199802076T2 (en) 1998-12-21
HUP9901657A2 (en) 1999-08-30
SE506358C2 (en) 1997-12-08
EP0894197B1 (en) 2002-12-11
RU2172434C2 (en) 2001-08-20
HUP9901657A3 (en) 2000-02-28
CZ330698A3 (en) 1999-11-17
SE9601452D0 (en) 1996-04-17
NO984857D0 (en) 1998-10-16
ATE229621T1 (en) 2002-12-15
PL329393A1 (en) 1999-03-29

Similar Documents

Publication Publication Date Title
CA1042350A (en) Transition reinforcement of composite blade dovetails
US3679324A (en) Filament reinforced gas turbine blade
US5211500A (en) Composite rope having molded-on fixing member at end portion thereof
JPH02501086A (en) Composite fastener and its manufacturing method
US5437342A (en) Drill string protection
JPH0322298B2 (en)
KR950013725B1 (en) Composite helicopter swashplate
WO1997039243A1 (en) Vane element
GB2356594A (en) Rotary die cutting cover
US20040065033A1 (en) Prefabricated construction element for buildings
EP0948718B1 (en) Rotor blade
US3713752A (en) Composite blade for a gas turbine engine
CA2346751C (en) Screen and method for manufacturing a reinforcement element for a screen plate
JPH11108027A (en) U bolt manufacturing method
US20040213976A1 (en) Non-metallic reinforcement member for the reinforcement of a structure and process of its manufacture
KR960004171B1 (en) Composite helicopter rotor hub
KR100211732B1 (en) Manufacturing method of fiber reinforced composite lattice structure
JPS6249171B2 (en)
JPH0473501B2 (en)
JPH06102925B2 (en) Fiber-reinforced synthetic resin prestressed concrete tension member anchoring structure
RU98120520A (en) BLADE
CA1317903C (en) Tram car wheel
Simler et al. Manufacturing technology program for improvement in productivity and cost in the manufacture of carbon-carbon rocket nozzles
DE9402776U1 (en) Vehicle rim
Groult et al. Antiabrasion Curved Section and Method of Manufacture

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH HU IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG US UZ VN YU AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 142198

Country of ref document: SK

WWE Wipo information: entry into national phase

Ref document number: PV1998-3306

Country of ref document: CZ

WWE Wipo information: entry into national phase

Ref document number: 1998/02076

Country of ref document: TR

WWE Wipo information: entry into national phase

Ref document number: 1997919846

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1997919846

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref document number: 97537012

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: CA

WWP Wipo information: published in national office

Ref document number: PV1998-3306

Country of ref document: CZ

WWG Wipo information: grant in national office

Ref document number: PV1998-3306

Country of ref document: CZ

WWG Wipo information: grant in national office

Ref document number: 1997919846

Country of ref document: EP