EP1061264A1 - Pale de rotor cambrée, composée de deux parties jointes ensemble - Google Patents

Pale de rotor cambrée, composée de deux parties jointes ensemble Download PDF

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Publication number
EP1061264A1
EP1061264A1 EP00202050A EP00202050A EP1061264A1 EP 1061264 A1 EP1061264 A1 EP 1061264A1 EP 00202050 A EP00202050 A EP 00202050A EP 00202050 A EP00202050 A EP 00202050A EP 1061264 A1 EP1061264 A1 EP 1061264A1
Authority
EP
European Patent Office
Prior art keywords
piece
rotor blade
tail piece
nose piece
tail
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Withdrawn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
EP00202050A
Other languages
German (de)
English (en)
Inventor
Riccardo Manisco
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.)
FBM Hudson Italiana SpA
Original Assignee
FBM Hudson Italiana SpA
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 FBM Hudson Italiana SpA filed Critical FBM Hudson Italiana SpA
Publication of EP1061264A1 publication Critical patent/EP1061264A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • F04D29/362—Blade mountings adjustable during rotation

Definitions

  • the present invention relates to the technological field of propellers, fans or more generally to twin-blade or multi-blade rotors which are used for aeronautical applications or for ventilation purposes since they produce with their movement an axial air flow parallel to their axis of rotation.
  • the invention relates to a blade suitable for being fixed to the hub of a rotor.
  • sections of a blade located at different radial distances from the axis of the hub, i.e. the axis of rotation, have different tangential translation speeds for the same angular speed of rotation of the rotor.
  • the net thrust area of a blade normally increases in the direction from the end of said blade towards the hub.
  • blades made of glass-fibre reinforced plastic are used, it being possible to produce said blades with parabolic or hyperbolic warping during manufacture thereof.
  • blades are made composed of a nose piece and a tail piece, said parts extending linearly along the whole longitudinal extension of the said blades and being joined together after undergoing varied twisting.
  • These two parts are formed from box-type extruded sections, i.e. having the outline of their profile closed perimetrically, with the tail profile having a cross section covering a small area compared to that of the nose profile.
  • a rotor blade which is obtained by means of two parts, i.e. a nose piece and a tail piece, joined together and in which the cross-sectional shape of the tail piece is such that it satisfies the requirements with regard to lift and static thrust, but has a limited torsional and flexural strength, thus being suitable for deformation with warping angles which are variable in accordance with a desired non-linear pattern in the direction of the longitudinal axis of the said blade, without its external edges assuming contours which cannot be matched with those of the end part of the nose piece onto which it is to be fixed.
  • the present invention in fact relates to a rotor blade as described in the preamble of the accompanying Claim 1, characterized by the characterizing part of the same claim.
  • a blade 1 according to the invention is composed of a nose piece 2 and a tail piece 3 which can be assembled together: the tail piece 3 is formed from a hollow extruded section in the form of an open "V" with a desired thickness of its walls.
  • the free ends 3m, 3n of the tail piece are shaped so that they have a profile matching two recesses 2p, 2q formed on the end part 2t of the nose piece 2 which is formed from an extruded section of the box type, i.e. with a closed contour.
  • the two parts 2, 3 forming the blade 1 may be joined together: the low torsional and flexural strength of the two sides of the open "V" forming the tail piece 3 facilitates the said warping and in particular, also during the assembly stage, allows warping thereof, if necessary, to be modified slightly in a suitable manner, section by section, so as to achieve perfect mating of the aligned edges of the two parts 2, 3 assembled together as shown in Figure 4.
  • the invention thus provides a blade 1 with non-linear warping (see progression of warping angle ⁇ in Figures 1 to 3) which can be achieved by means of simple operations and using extruded sections, preferably made of aluminium, having a low cost, thus achieving the predefined objects of the inventor.
  • the two parts 2, 3, after assembly, may be fixed using known techniques such as, for example, riveting, welding or gluing using special structural adhesives known to persons skilled in the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
EP00202050A 1999-06-14 2000-06-08 Pale de rotor cambrée, composée de deux parties jointes ensemble Withdrawn EP1061264A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999MI001321A ITMI991321A1 (it) 1999-06-14 1999-06-14 Pala svergolata per girante composta da due elementi congiunti
ITMI991321 1999-06-14

Publications (1)

Publication Number Publication Date
EP1061264A1 true EP1061264A1 (fr) 2000-12-20

Family

ID=11383163

Family Applications (2)

Application Number Title Priority Date Filing Date
EP00202051A Withdrawn EP1061263A1 (fr) 1999-06-14 2000-06-08 Rotor avec pâles attachées à un moyeu par des paliers montés dans un manchon
EP00202050A Withdrawn EP1061264A1 (fr) 1999-06-14 2000-06-08 Pale de rotor cambrée, composée de deux parties jointes ensemble

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP00202051A Withdrawn EP1061263A1 (fr) 1999-06-14 2000-06-08 Rotor avec pâles attachées à un moyeu par des paliers montés dans un manchon

Country Status (2)

Country Link
EP (2) EP1061263A1 (fr)
IT (1) ITMI991321A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1019437C2 (nl) * 2001-11-26 2003-05-27 Ventilatoren Sirocco Howden Bv Rotorbladprofiel.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3025748B1 (fr) * 2014-09-11 2016-11-18 Gea Batignolles Tech Thermiques Ventilateur pour aerorefrigerant.
US10137980B2 (en) 2015-07-13 2018-11-27 Ge Aviation Systems Llc Hub assembly and propeller assemblies

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB856668A (en) * 1958-07-10 1960-12-21 Air Control Installations Ltd Improvements in or relating to axial-flow rotary impellers
US4892460A (en) * 1989-01-30 1990-01-09 Volk Steve J Propeller breeze enhancing blades for conventional ceiling fans
US5328329A (en) * 1993-07-06 1994-07-12 Hudson Products Corporation Fan blade width extender
US5328330A (en) * 1993-08-02 1994-07-12 Hudson Products Corporation Extruded aluminum fan blade

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB254377A (en) * 1925-03-30 1926-06-30 Bramson Mogens Louis Improvements in or relating to variable pitch propellers
GB1023824A (en) * 1961-12-07 1966-03-23 Aerex Ltd Improvements in and relating to variable or adjustable pitch fans

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB856668A (en) * 1958-07-10 1960-12-21 Air Control Installations Ltd Improvements in or relating to axial-flow rotary impellers
US4892460A (en) * 1989-01-30 1990-01-09 Volk Steve J Propeller breeze enhancing blades for conventional ceiling fans
US5328329A (en) * 1993-07-06 1994-07-12 Hudson Products Corporation Fan blade width extender
US5328330A (en) * 1993-08-02 1994-07-12 Hudson Products Corporation Extruded aluminum fan blade

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1019437C2 (nl) * 2001-11-26 2003-05-27 Ventilatoren Sirocco Howden Bv Rotorbladprofiel.

Also Published As

Publication number Publication date
ITMI991321A1 (it) 2000-12-14
EP1061263A1 (fr) 2000-12-20
ITMI991321A0 (it) 1999-06-14

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