EP0440048A1 - Roue de ventilateur - Google Patents

Roue de ventilateur Download PDF

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Publication number
EP0440048A1
EP0440048A1 EP91100545A EP91100545A EP0440048A1 EP 0440048 A1 EP0440048 A1 EP 0440048A1 EP 91100545 A EP91100545 A EP 91100545A EP 91100545 A EP91100545 A EP 91100545A EP 0440048 A1 EP0440048 A1 EP 0440048A1
Authority
EP
European Patent Office
Prior art keywords
disk
disks
rolling
blade
slots
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Withdrawn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
EP91100545A
Other languages
German (de)
English (en)
Inventor
Giovanni Bianco
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.)
ELETTROVAGO SpA
Original Assignee
ELETTROVAGO 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 ELETTROVAGO SpA filed Critical ELETTROVAGO SpA
Publication of EP0440048A1 publication Critical patent/EP0440048A1/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Withdrawn legal-status Critical Current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
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers

Definitions

  • the present invention relates to impellers, for example for crossflow fans, to a disk for such impellers and the related method of assembly.
  • An impeller for fans or compressors comprises at least two radial disks and a plurality of peripheral axial fins or blades with curved contour.
  • the blades are mounted on the disks, by being inserted radially into corresponding slots cut on the disks and opening onto the periphery of the same, and then being suitably locked.
  • the blades are suitably shaped at the points of connection with the disks, for example being squashed so that they can be inserted into the slots and remain axially locked.
  • the radial locking of the blades takes place by folding, by a disk rolling process, a projection foreseen in correspondence with one side of the peripheral opening of each slot onto the other side of the opening itself.
  • One aim of the invention is to provide a fan impeller which can be simply and securely assembled and which has the possibility of varying the curve of the blades, and therefore the air flow of the same, during the disk rolling process.
  • the fan impeller according to the invention has a substantially circular contour, with a plurality of slots open on the outer contour, each being suitable for receiving a corresponding blade, at least one through hole being foreseen between each pair of consecutive slots near the peripheral edge of the disk, suitable for receiving the material overhanging during the rolling of the disk, which causes the occlusion of the slot openings.
  • each slot on one side of each slot a small tooth is foreseen, suitable for locking the blade radially before rolling, in order to prevent it coming out accidentally.
  • the blades used in the fan impeller in accordance with the invention, have simple notches in correspondence with the connection points with the disks, suitable for receiving the bottom of each respective slot, in order to ensure the axial locking of the blades themselves.
  • a fan impeller is illustrated, shown as a whole with reference number 1, consisting of three radial disks 2, two terminal and one intermediate, and of a plurality of axial blades 3, located at regular intervals and at the same inclination on the walls of the disks 2, near their outer edges.
  • the impeller 1 is set in rotation in the direction of the arrow F, by means of a shaft 4 projecting axially from one of the terminal disks 2.
  • Each disk as can be seen more clearly from the plan view in figure 2, has an exactly circular outer contour and a plurality of open slots 5 on the outer contour of the disk.
  • the slots 5 are equidistant and are all at the same inclination with respect to the radial direction. For the sake of simplicity the slots 5 will also be called radial.
  • a type of tooth 6 is formed, in which a hole 7 is made, situated near the outer contour of the disk and substantially elongated in the direction of the circumference of the disk itself.
  • Each hole 7 has two lengths 8 which are rectilinear or have a large bending radius and which are joined by two circular lengths 9, 10, of different diameters, in such a way as to determine a decreasing span of the hole 7 in the direction of the arrow F, that is in the direction of the rotation of the disk.
  • Each slot 5 has a substantially constant width, growing narrower in correspondence with its respective bottom 11.
  • each slot 5 On one of the two sides of each slot 5 (the front one, with reference to the direction of the rotation of the disk 2) a small tooth 12 is foreseen, suitable for radially locking the blade 3 before rolling.
  • the blade 3 has a curved contour and has notches 13 whose width is slightly superior to the thickness of the disks 2, in correspondence with the connecting points with the disks themselves, in such a way that they fit into the bottom 11 of the corresponding slot 5 and axially lock the blade.
  • each notch 13 on the blade 3 a corresponding undercutting 14 of greater width is foreseen, suitable for receiving the material from the edge of the disk which closes the opening of the slot 5 after the rolling process, as will be described more clearly below.
  • the rolling process of the disk 2, shown in diagrammatic form in figure 4, is carried out by means of a roller 15, illustrated with a broken line in various positions, which is pressed against the peripheral edge of the disk at a determined pressure.
  • Rolling produces a decrease in the original outer diameter of the disk, which increases with the increase in the pressure used.
  • each hole 7 foreseen on the teeth 6 is illustrated in the appended figures solely as an example, and therefore they can be of any other shape, on the understanding that their function of receiving excess material after rolling remains the same. Similarly, each hole 7 can be substituted by more than one hole of smaller dimensions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP91100545A 1990-02-02 1991-01-18 Roue de ventilateur Withdrawn EP0440048A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1925190 1990-02-02
IT19251A IT1238471B (it) 1990-02-02 1990-02-02 Girante per ventilatori

Publications (1)

Publication Number Publication Date
EP0440048A1 true EP0440048A1 (fr) 1991-08-07

Family

ID=11156133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91100545A Withdrawn EP0440048A1 (fr) 1990-02-02 1991-01-18 Roue de ventilateur

Country Status (2)

Country Link
EP (1) EP0440048A1 (fr)
IT (1) IT1238471B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0773605A2 (fr) 1995-11-10 1997-05-14 ARBO Medizin-Technologie GmbH Dispositif de fiches multiples avec plusieurs fiches individuelles
CN1311165C (zh) * 2003-10-23 2007-04-18 松下电器产业株式会社 横流风扇及横流风扇的制造方法
CN101463833B (zh) * 2008-12-18 2012-05-09 浙江兴昌风机有限公司 离心风轮及其制造方法
WO2016090417A1 (fr) * 2014-12-12 2016-06-16 Aireng Pty Ltd Ventilateur centrifuge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5698599A (en) * 1980-09-29 1981-08-08 Hitachi Ltd Manufacture of multivane fan
JPS5779297A (en) * 1980-11-04 1982-05-18 Akaishi Kinzoku Kogyo Kk Cylindrical multi-blade fan
JPS5949395A (ja) * 1982-09-14 1984-03-21 Japan Servo Co Ltd クロスフロ−フアン

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5698599A (en) * 1980-09-29 1981-08-08 Hitachi Ltd Manufacture of multivane fan
JPS5779297A (en) * 1980-11-04 1982-05-18 Akaishi Kinzoku Kogyo Kk Cylindrical multi-blade fan
JPS5949395A (ja) * 1982-09-14 1984-03-21 Japan Servo Co Ltd クロスフロ−フアン

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, unexamined applications, M field, Vol. 5, No. 172, October 31, 1981, The Patent Office Japanese Government, page 109 M 95; & JP-A-56 098 599 (HITACHI). *
PATENT ABSTRACTS OF JAPAN, unexamined applications, M field, Vol. 6, No. 163, August 26, 1982, The Patent Office Japanese Government, page 122 M 152; & JP-A-57 079 297 (AKAISHI). *
PATENT ABSTRACTS OF JAPAN, unexamined applications, M field, Vol. 8, No. 154, July 18, 1984, The Patent Office Japanese Government, page 9 M 310; & JP-A-59 049 395 (NIHON SAABO). *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0773605A2 (fr) 1995-11-10 1997-05-14 ARBO Medizin-Technologie GmbH Dispositif de fiches multiples avec plusieurs fiches individuelles
CN1311165C (zh) * 2003-10-23 2007-04-18 松下电器产业株式会社 横流风扇及横流风扇的制造方法
CN101463833B (zh) * 2008-12-18 2012-05-09 浙江兴昌风机有限公司 离心风轮及其制造方法
WO2016090417A1 (fr) * 2014-12-12 2016-06-16 Aireng Pty Ltd Ventilateur centrifuge

Also Published As

Publication number Publication date
IT1238471B (it) 1993-08-18
IT9019251A0 (it) 1990-02-02
IT9019251A1 (it) 1991-08-03

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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