WO1997045643A1 - Roue centrifuge de ventilateur - Google Patents

Roue centrifuge de ventilateur Download PDF

Info

Publication number
WO1997045643A1
WO1997045643A1 PCT/SE1997/000838 SE9700838W WO9745643A1 WO 1997045643 A1 WO1997045643 A1 WO 1997045643A1 SE 9700838 W SE9700838 W SE 9700838W WO 9745643 A1 WO9745643 A1 WO 9745643A1
Authority
WO
WIPO (PCT)
Prior art keywords
impeller
rotation axis
backplate
blades
revolution
Prior art date
Application number
PCT/SE1997/000838
Other languages
English (en)
Inventor
Claude Longet
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 AU29863/97A priority Critical patent/AU2986397A/en
Priority to EP97924445A priority patent/EP0900336A1/fr
Publication of WO1997045643A1 publication Critical patent/WO1997045643A1/fr

Links

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
    • 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
    • F04D29/30—Vanes

Definitions

  • the present invention relates to centrifugal impellers which can be included in centrifugal fans as well as in in-line fans.
  • Figs. 1A to IE Classic centrifugal impellers are represented in Figs. 1A to IE. They consist of blades 2 attached on the impeller backplate 3, these blades being classically covered by a profiled, conical or even flat shroud 1. They are fixed on a shaft extension through a hub 4 and rotate around the hub axis 8.
  • the impeller backplate 3 is flat and so perpendi ⁇ cular to the rotation axis 8 as shown in Figs. 1A to ID. Exceptionally it may be profiled as in Fig. IE but even in this case it is tangent along its terminal circle 19 to a plane 20 perpendicular to the rotation axis 8.
  • the blades are developable with generatrices parallel to the rotation axis, the blade trailing edge 6 being classically a generatrix. They can be hollow aero ⁇ foils as in Fig. 1A or flat as in Figs. IB and IC, or flat with a spoon 21 closed to the leading edge 5.
  • generatrices are not parallel with the rotation axis 8 the distance from one point of the trailing edge 6 to the rotation axis 8 remains substantially constant from the shroud 1 to the backplate 3.
  • the blade leading edge 5 presents different variants accor ⁇ ding to the blade type. It may be a generatrix parallel to the rotation axis 8 as in figures 1A and IB or a flat line as in figure IC or a curved line as in figure ID and IE, the distance from one point of the leading edge 5 to the rotation axis 8 being in these last cases not constant from the shroud 1 to the backplate 3.
  • the invention may be a generatrix parallel to the rotation axis 8 as in figures 1A and IB or a flat line as in figure IC or a curved line as in figure ID and IE, the distance from one point of the leading edge 5 to the rotation axis 8 being in these last cases not constant from the shroud 1 to the backplate 3.
  • the object of the invention is to provide a new centrifugal impeller design giving an increased flow with regard to a clas ⁇ sical centrifugal impeller, the impeller discharge section at every distance from the rotation axis remaining the same.
  • This object is attained by modifying the classical cen ⁇ trifugal impeller design through the introduction, as backplate, of a truncated revolution cone, which axis is the impeller rotation axis, and by using blades, for which the dis- tance from one point of the trailing edge to the rotation axis is substantially constant from the shroud to the backplate.
  • the section of the impeller according to the invention looks like the section of a classical centrifugal impeller which may have been sloped.
  • the fan centrifugal impeller according to the invention is defined by the characterizing features of claim 1. Preferred embodiments of the invention is defined in the subclaims.
  • FIG. 1 illustrates different variants of centrifugal impellers according to the prior art
  • FIG. 2 shows the preferred embodiment of the centrifu ⁇ gal impeller according to the invention
  • Fig. 3 shows one embodiment similar to that shown in Fig. 2 but with a further modified backplate
  • Fig. 4 shows one embodiment similar to that shown in Fig. 2 but with variants for the blade trailing edge
  • Fig. 5 shows one embodiment similar to that shown in
  • Fig. 2 shows a classic centrifugal fan including an impeller according to the invention
  • Fig. 7 shows an in-line fan including an impeller according to the invention.
  • the centrifugal impeller according to the inven ⁇ tion in the simplest design, is illustrated, having blades 2 arranged on the impeller backplate 3 and covered by a shroud 1.
  • the backplate 3 is a truncated revolution cone which belongs to a revolution cone 22 the axis of which is the impeller rotation axis 8, the vertex being 9, and which vertex angle is smaller or equal to 160°, the preferred range being from 130° to 110° for aeraulic characteristics reasons.
  • the blades 2 are developable blades with generatrices parallel to the rotation axis 8, the blade leading edge 5 and the blade trailing edge 6 being generatrices.
  • the shroud 1 is a surface of revolution.
  • centrifugal impellers are based on the hypothesis of a slight evolution of the discharge section area of the impeller from the blades leading edge 5 to the blades trailing edge 6. That involves that the mean shroud slope must be adapted to the slope of the backplate. That is why a section by a plane passing through the impeller rotation axis 8, the section of the impeller according to the invention looks like the section of a classical centrifugal impeller which may have been sloped.
  • Fig. 3 shows that more generally the backplate 3 may be convex or concave or any surface of revolution having as axis the impeller rotation axis 8, at the only one condition to be tangent along its external circle 19 to a revolution cone 22 the axis of which is the impeller rotation axis 8, the vertex being 9 and which vertex angle is smaller than or equal to 160°, the preferred range being from 130° to 110° for aeraulic reasons.
  • the blades trailing edge 6 may not be generatrices parallel to the impeller rotation axis at the only one condition that the distance to the rotation axis 8 along the trailing edge 6 may remain substantially con ⁇ stant inside a tolerance of ⁇ 5 % of its value R at the trail- ing edge extremity 19 on the backplate side.
  • Fig. 5 shows that more generally the blades leading edge 5 may not be generatrices parallel to the impeller rotation axis 8 and that the distance to the rotation axis 8 along the leading edge 5 may vary substantially.
  • the leading edge 5 may even be part of a spoon 21.
  • Fig. 6 shows a classical centrifugal fan including an impeller according to the invention.
  • This centrifugal fan con ⁇ sists of a casing 11, a support 14 attached to the casing 11 and supporting a driving electrical motor 13, an impeller 12 according to the invention and fixed on the shaft extension of the driving electrical motor 13 and an inlet cone 10 attached to the casing 11.
  • the casing backplate 15 is designed to move away adequately the impeller 12 of the casing 11 so that the gasflow leaving the impeller 12 could easily continue to turn inside the casing 11.
  • Fig. 7 shows an in-line fan including an impeller according to the invention.
  • This in-line fan consists of a casing 16, including a downstream guide vane 17, a support 14 attached to the downstream guide vane 17 and supporting a driving elec ⁇ trical motor 13, an impeller 12 according to the invention and fixed on the shaft extension of the driving electrical motor 13, and an inlet cone 10 attached to the casing 16.
  • a torus 18 attached to the downstream guide vane 17 allows the gasflow, at the outlet of the wheel 12 to easily turn into the downstream guide vane 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Roue centrifuge de ventilateur comprenant une plaque arrière (3), dont la forme est conçue en tant que surface de révolution possédant en tant qu'axe l'axe de rotation (8) de la roue, et qui est tangente le long de sa circonférence extérieure à un cône de révolution (22), dont l'angle de pointe (α) est inférieur ou égal à 160° et, de préférence, situé entre 130° et 110°; des pales (2) montées sur la plaque arrière et possédant un bord avant (5) et un bord arrière (6), la distance jusqu'à l'axe de rotation (8) le long du bord arrière restant sensiblement constante; une enveloppe protectrice (1), dont la forme est conçue en tant que surface de révolution et possède en tant qu'axe l'axe de rotation (8) de la roue.
PCT/SE1997/000838 1996-05-24 1997-05-23 Roue centrifuge de ventilateur WO1997045643A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU29863/97A AU2986397A (en) 1996-05-24 1997-05-23 A fan centrifugal impeller
EP97924445A EP0900336A1 (fr) 1996-05-24 1997-05-23 Roue centrifuge de ventilateur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9602002-9 1996-05-24
SE9602002A SE515523C2 (sv) 1996-05-24 1996-05-24 Fläkthjul för radialfläkt samt radialfläkt och kanalfläkt innefattande ett dylikt fläkthjul

Publications (1)

Publication Number Publication Date
WO1997045643A1 true WO1997045643A1 (fr) 1997-12-04

Family

ID=20402699

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1997/000838 WO1997045643A1 (fr) 1996-05-24 1997-05-23 Roue centrifuge de ventilateur

Country Status (4)

Country Link
EP (1) EP0900336A1 (fr)
AU (1) AU2986397A (fr)
SE (1) SE515523C2 (fr)
WO (1) WO1997045643A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150377026A1 (en) * 2013-02-21 2015-12-31 Thy Engineering Wheel of a Turbine, Compressor or Pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1314049A (en) * 1919-08-26 Centrifugal fan
DE338436C (de) * 1921-06-18 Alexander Varga Beiderseitig durch Kegelmaentel abgeschlossene Schaufeltrommel fuer Kreiselgeblaese
US3650633A (en) * 1970-11-30 1972-03-21 Remi A Benoit In-line centrifugal fan
US4274810A (en) * 1977-06-29 1981-06-23 Kawasaki Jukogyo Kabushiki Kaisha Diagonal-flow fan wheel with blades of developable surface shape
US4647271A (en) * 1984-06-08 1987-03-03 Hitachi, Ltd. Impeller of centrifugal blower

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1314049A (en) * 1919-08-26 Centrifugal fan
DE338436C (de) * 1921-06-18 Alexander Varga Beiderseitig durch Kegelmaentel abgeschlossene Schaufeltrommel fuer Kreiselgeblaese
US3650633A (en) * 1970-11-30 1972-03-21 Remi A Benoit In-line centrifugal fan
US4274810A (en) * 1977-06-29 1981-06-23 Kawasaki Jukogyo Kabushiki Kaisha Diagonal-flow fan wheel with blades of developable surface shape
US4647271A (en) * 1984-06-08 1987-03-03 Hitachi, Ltd. Impeller of centrifugal blower

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150377026A1 (en) * 2013-02-21 2015-12-31 Thy Engineering Wheel of a Turbine, Compressor or Pump

Also Published As

Publication number Publication date
SE9602002D0 (sv) 1996-05-24
SE9602002L (sv) 1997-11-25
SE515523C2 (sv) 2001-08-20
EP0900336A1 (fr) 1999-03-10
AU2986397A (en) 1998-01-05

Similar Documents

Publication Publication Date Title
US4531890A (en) Centrifugal fan impeller
US5437541A (en) Blade for axial fan
US4543041A (en) Impellor for centrifugal compressor
US9157449B2 (en) Multi-blade centrifugal fan and air conditioner using the same
US6027307A (en) Fan and shroud assembly adopting the fan
CA1219245A (fr) Soufflante centrifuge mono-etagee a sorties multiples
US6634855B1 (en) Impeller and fan incorporating same
EP0846868A2 (fr) Unité de soufflante centrifugale
US5743710A (en) Streamlined annular volute for centrifugal blower
CN103362868B (zh) 轴流风机
JPS61229989A (ja) 遠心ポンプ
GB2216605A (en) Fan stator
WO1990009524A1 (fr) Ventilateur centrifuge et diffuseur a volute d'accumulation
EP0900336A1 (fr) Roue centrifuge de ventilateur
JPH1122695A (ja) 遠心圧縮機のインペラ翼構造
JPH10153194A (ja) 遠心ファン
JP3411701B2 (ja) 遠心送風機
JP3311526B2 (ja) 軸流送風機
JP3492097B2 (ja) 遠心圧縮機用翼付ディフューザ
CN112855609A (zh) 风扇和电机
JPH1037894A (ja) 遠心ファン
JPH0474560B2 (fr)
KR100393563B1 (ko) 터보팬
JPH06299998A (ja) 斜流ファン
JPS6357635B2 (fr)

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 CZ DE DE DK DK EE ES FI 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

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: 1997924445

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 97542173

Format of ref document f/p: F

WWP Wipo information: published in national office

Ref document number: 1997924445

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 country code: CA

WWW Wipo information: withdrawn in national office

Ref document number: 1997924445

Country of ref document: EP