EP1621775A2 - Gebläserotor aus Verbundwerkstoff für Tangentialgebläse - Google Patents

Gebläserotor aus Verbundwerkstoff für Tangentialgebläse Download PDF

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Publication number
EP1621775A2
EP1621775A2 EP05106204A EP05106204A EP1621775A2 EP 1621775 A2 EP1621775 A2 EP 1621775A2 EP 05106204 A EP05106204 A EP 05106204A EP 05106204 A EP05106204 A EP 05106204A EP 1621775 A2 EP1621775 A2 EP 1621775A2
Authority
EP
European Patent Office
Prior art keywords
fan
fan rotor
blades
transverse
rotor
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Withdrawn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
EP05106204A
Other languages
English (en)
French (fr)
Other versions
EP1621775A3 (de
Inventor
Nathaniel Mulcahy
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.)
Askoll P&C SRL
Original Assignee
Emerson Appliance Motors Europe SRL
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 Emerson Appliance Motors Europe SRL filed Critical Emerson Appliance Motors Europe SRL
Publication of EP1621775A2 publication Critical patent/EP1621775A2/de
Publication of EP1621775A3 publication Critical patent/EP1621775A3/de
Withdrawn legal-status Critical Current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
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/12—Light metals
    • F05D2300/121—Aluminium
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the present invention relates to a fan rotor, in particular for a tangential fan, comprising:
  • Tangential fans are used in particular in air conditioning systems and for ventilating ovens.
  • fan rotors for such fans have a cylindrical cage structure with at least two end discs and, frequently, intermediate discs too, with preferably arcuate blades extending longitudinally between them.
  • Such fan rotors are generally made of metal. More recently, fan rotors of plastics material have been available.
  • Fan rotors made completely of metal are typically made of pressed sheet metal, while plastics fan rotors are generally manufactured by injection moulding.
  • Fan rotors made of a metal offer good reliability even at high temperatures, but are limited as to the possible shape of the blades.
  • the thickness of blades produced from sheet metal is essentially constant, so it is not possible to make blades with a more aerodynamically effective cross section, for example blades which have a wing profile.
  • Plastics blades on the other hand, can be moulded into a variety of shapes and thicknesses and can, in particular, be given a wing profile which offers high performance and low noise levels of the fan.
  • thermoplastic material used is subject to high temperatures in operation, at which the rotor can become deformed, with its structure being at risk of undergoing physical, chemical and dimensional alterations which can reduce its reliability.
  • a second disadvantage lies in the fact that the process for moulding a cage-structure fan rotor is highly complicated, with regard to dimensions and to the design of the moulds and with regard to the ease with which a fan can be extracted from the mould, this last being the reason why blades are often manufactured so as to project radially beyond one of the terminal discs. These radially projecting blades make the fan noisier in operation.
  • a third disadvantage is related to the mounting of elastomeric hubs on the longitudinal ends of the fan rotor. These hubs are generally either co-moulded with the terminal portions of the fan rotor or inserted into the said terminal portions and such operations can give rise to problems.
  • One object of the invention is to overcome these disadvantages of the prior art and to provide a fan rotor of the type described above, which is reliable at high temperatures, has a structure which is both simple and compact and is characterised by low operating noise, is simple and economical to manufacture and offers a high operating efficiency.
  • the fan rotor provides enhanced reliability and improved performance.
  • a fan rotor of this type is easier to produce since only the blades are injection-moulded, thereby eliminating the need to form the entire cage structure in a single mould, with the blades then being fitted to the transverse portions using the same method and machinery used to assemble fan rotors made entirely of metal.
  • the blades do not need to project radially from the terminal support elements of the fan rotor, providing the considerable advantage of reducing fan noise.
  • a tangential fan of a type which is known per se is generally indicated 1, having a support structure or shroud 2 also for conveying air and made of sheet metal or a plastics material.
  • a fan rotor 10 is mounted for rotation in the structure 2, rotatable by means of an electric motor 3, preferably an alternating current electric motor, for example a screened pole asynchronous motor.
  • an electric motor 3 preferably an alternating current electric motor, for example a screened pole asynchronous motor.
  • the structure 2 includes two facing end walls 4, 5 and at least one side wall 9 extending about the axis of the fan rotor 10, between the said end walls.
  • Two supports, indicated 6, are provided for the rotation of the fan rotor 10, which in operation rotates about an axis indicated A.
  • the fan rotor 10 has a cage-like structure, generally cylindrical in shape, with two transverse elements or discs 12 and an intermediate transverse disc element 14 with a circumferential arrangement of blades 16 around it, all preferably arcuate in section.
  • a plurality of intermediate discs it is possible to use a plurality of intermediate discs.
  • FIG 2 shows a perspective view of the fan rotor 10 with the blades 16 fitted onto the transverse elements 12, 14. These latter are made of metal, have notches 18 in their perimeter (see Figure 3), and are usually produced by pressing.
  • the blades 16 are produced, for example, by injection moulding of a thermoplastic material and are coupled to the transverse elements 12, 14 at the notches 18. These latter are preferably of a complementary arcuate configuration able to house and retain corresponding portions of the blades 16, by means of interference fit coupling, for example.
  • plastic blades 16 it is advantageous for the plastic blades 16 to be made with an optimised fluid-dynamic section, of a wing profile, for example.
  • portions 22 of each blade 16 intended to be inserted into corresponding grooves 18 in the transverse terminal elements 12 (and in any intermediate transverse element or elements 14) can have a modified section, in particular thinner, with respect to the rest of the blade, in order to facilitate this insertion operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP05106204A 2004-07-30 2005-07-07 Gebläserotor aus Verbundwerkstoff für Tangentialgebläse Withdrawn EP1621775A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000542A ITTO20040542A1 (it) 2004-07-30 2004-07-30 Ventola composita per un ventilatore di tipo tangenziale

Publications (2)

Publication Number Publication Date
EP1621775A2 true EP1621775A2 (de) 2006-02-01
EP1621775A3 EP1621775A3 (de) 2009-10-21

Family

ID=35266890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05106204A Withdrawn EP1621775A3 (de) 2004-07-30 2005-07-07 Gebläserotor aus Verbundwerkstoff für Tangentialgebläse

Country Status (3)

Country Link
EP (1) EP1621775A3 (de)
CN (1) CN1734100A (de)
IT (1) ITTO20040542A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103352869A (zh) * 2013-04-15 2013-10-16 温州市亨成电子有限公司 铝制一次成型横流式风轮、涡流式风轮及其加工工艺

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101832294B (zh) * 2010-05-21 2013-04-17 余姚天超通风设备有限公司 一种金属斜贯流风叶的制造方法
CN105240937A (zh) * 2015-10-12 2016-01-13 珠海格力电器股份有限公司 空调室内机和空调器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3536416A (en) * 1968-05-14 1970-10-27 Dov Z Glucksman Squirrel-cage rotor for fluid moving devices
JPS55148998A (en) * 1979-05-10 1980-11-19 Mineichi Akaishi Multiple blade fan
JPH0798000A (ja) * 1993-09-28 1995-04-11 Takao Kobayashi 多翼遠心送風機の羽根車の構造、及びその製法。

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103352869A (zh) * 2013-04-15 2013-10-16 温州市亨成电子有限公司 铝制一次成型横流式风轮、涡流式风轮及其加工工艺
CN103352869B (zh) * 2013-04-15 2015-11-25 温州市亨成电子有限公司 铝制一次成型横流式风轮、涡流式风轮及其加工工艺

Also Published As

Publication number Publication date
ITTO20040542A1 (it) 2004-10-30
EP1621775A3 (de) 2009-10-21
CN1734100A (zh) 2006-02-15

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