DE2850358A1 - Axial-flow or centrifugal fan - has auxiliary aerofoil slats at leading blade edges to reduce flow breakaway at low speed - Google Patents

Axial-flow or centrifugal fan - has auxiliary aerofoil slats at leading blade edges to reduce flow breakaway at low speed

Info

Publication number
DE2850358A1
DE2850358A1 DE19782850358 DE2850358A DE2850358A1 DE 2850358 A1 DE2850358 A1 DE 2850358A1 DE 19782850358 DE19782850358 DE 19782850358 DE 2850358 A DE2850358 A DE 2850358A DE 2850358 A1 DE2850358 A1 DE 2850358A1
Authority
DE
Germany
Prior art keywords
flow
axial
slats
centrifugal fan
low speed
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Withdrawn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
DE19782850358
Other languages
German (de)
Inventor
Wolfgang Ing Grad Kurzer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19782850358 priority Critical patent/DE2850358A1/en
Publication of DE2850358A1 publication Critical patent/DE2850358A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • F01D5/146—Shape, i.e. outer, aerodynamic form of blades with tandem configuration, split blades or slotted blades
    • 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
    • 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
    • F04D29/384—Blades characterised by form
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers 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
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/303—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the leading edge of a rotor blade
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Abstract

The arrangement is intended for an axial-flow or a centrifugal fan with bladed impeller. To reduce break-away of the air flow from the blade surface at low circumferential speed, the blades are provided with auxiliary slats at their leading edges to form slotted aerofoils.

Description

'2''2'

Wolfgang Kurzer
in Fa.:Wolfgang Kurzer
in company:

W. KURZER ■ Postfach 706 ■ 2940 WilhelmshavenW. KURZER ■ P.O. Box 706 ■ 2940 Wilhelmshaven

An das Deutsche Patentamt
Patent- bzw. Gebrauchsmusterstelle
Zweibrückenstr. 12To the German Patent Office
Patent or utility model office
Zweibrückenstrasse 12th

aODD München 2aODD Munich 2

Ihre Nachricht vomYour message from Mein ZeichenMy sign Alter Banter Weg 65Old Banter Weg 65 Ihr ZeichenYour sign 6.11.7811/6/78 H/klH / kl 2940 WILHELMSHAVEN2940 WILHELMSHAVEN 27G5/78 (K)27G5 / 78 (K) 16.11.197811/16/1978

nachir ",glich.1 geändertnachir ", resembled. 1 changed

Patentanmeldung mit gleichzeitiger Gebrauchsmuster-Patent application with simultaneous utility model

HilfsanmeldungHelp registration

V-a-han•4-Ayial- und Hadial-Ventilator-Laufrad,wobei riifi pHiigeT h7,w, .Sfihaiif^Tn mit VorflügelnVa-han • 4-Ayial and Hadial fan impellers, where riifi pHiigeT h7, w, .Sfihaiif ^ Tn with slats

aasgerüstet sindare armed

Im Flugzeugbau sind Vorflügel oder Spaltflügel für Langsamflug-Eigenschaften und als Hilfsmittel gegen den "überzogenen Flugzustand" bekannt.In aircraft construction, slats or slotted wings are used for slow flight properties and known as a remedy against the "excessive flight condition".

Im Ventilatarenbau (Radial- und Axialventilataren) müssen aftmals zur Erzielung eines möglichst geräuscharmen Laufes niedrige Umfangsgeschwindigkeiten des Läufers und niedrige Luftgeschuindigkeiten angestrebt werden. Bei herkömmlich bekannten Ausführungen scheitert das daran, daß die Luftströmung am Flügel des Axialventilators oder an der Schaufel des Radialventilators abreißt.In fan construction (radial and axial fans), aftmal low circumferential speeds to achieve the quietest possible running of the runner and low air velocities to be striven for. In conventionally known designs this fails because the air flow on the blade of the axial fan or tears off at the blade of the centrifugal fan.

Das gleiche betrifft auch Ventilatoren und Gebläse, die Luft oder Gase gegen hohe Drücke fördern müssen.The same applies to fans and blowers that have to convey air or gases against high pressures.

Durch die Verwendung von Vorflügeln kann der Strömungsabriß in vielen Fällen ujeitestgehend verhindert werden.By using slats, the stall in in many cases can be prevented as far as possible.

030022/0363030022/0363

Claims (1)

w, //. W w, //. W. Schutzanspruch:Protection claim: Flügelräder-bziii. Laufräder van Axial- Dder Radialventilatoren dadurch gekennzeichnet, daß die Flügel bzuj. Schaufeln mit Vorflügeln ausgerüstet ader als Spaltflügel ausgeführt sind. Siehe dazu Abb. 1 + 2. + 3.Impellers-bziii. Impellers of axial and centrifugal fans thereby characterized in that the wings bzuj. Blades with slats equipped or designed as split sashes. See Fig. 1 + 2. + 3. FERNRUF: Wilhelmshaven (O 44 21) 2 35 60 BANKKONTO: Sparkasse Wllhelmshaven, Konto-Nr. 2134633 (BLZ 282 50110)TELEPHONE: Wilhelmshaven (O 44 21) 2 35 60 BANK ACCOUNT: Sparkasse Wllhelmshaven, account no. 2134633 (BLZ 282 50110) TELEX: 0253428 POSTSCHECKKONTO: Hannover. Nr. 160251-304 (BLZ 250100 30)TELEX: 0253428 POST CHECK ACCOUNT: Hanover. No. 160251-304 (sort code 250 100 30) 030022/0363030022/0363
DE19782850358 1978-11-21 1978-11-21 Axial-flow or centrifugal fan - has auxiliary aerofoil slats at leading blade edges to reduce flow breakaway at low speed Withdrawn DE2850358A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782850358 DE2850358A1 (en) 1978-11-21 1978-11-21 Axial-flow or centrifugal fan - has auxiliary aerofoil slats at leading blade edges to reduce flow breakaway at low speed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782850358 DE2850358A1 (en) 1978-11-21 1978-11-21 Axial-flow or centrifugal fan - has auxiliary aerofoil slats at leading blade edges to reduce flow breakaway at low speed

Publications (1)

Publication Number Publication Date
DE2850358A1 true DE2850358A1 (en) 1980-05-29

Family

ID=6055188

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782850358 Withdrawn DE2850358A1 (en) 1978-11-21 1978-11-21 Axial-flow or centrifugal fan - has auxiliary aerofoil slats at leading blade edges to reduce flow breakaway at low speed

Country Status (1)

Country Link
DE (1) DE2850358A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317729A1 (en) * 1987-11-27 1989-05-31 Günter Petz Impeller for fans
EP0807760A2 (en) * 1996-05-17 1997-11-19 Calsonic Corporation Centrifugal multiblade fan
JP2007255398A (en) * 2006-03-27 2007-10-04 Matsushita Electric Ind Co Ltd Propeller fan and ventilation fan for pipe
EP2031208A2 (en) 2007-08-21 2009-03-04 Same Deutz-Fahr S.P.A. Axial fan for cooling the underhood of a farm machine
IT202100020579A1 (en) * 2021-07-30 2023-01-30 Cofimco Srl INDUSTRIAL AXIAL FAN

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317729A1 (en) * 1987-11-27 1989-05-31 Günter Petz Impeller for fans
EP0807760A2 (en) * 1996-05-17 1997-11-19 Calsonic Corporation Centrifugal multiblade fan
EP0807760A3 (en) * 1996-05-17 1998-10-07 Calsonic Corporation Centrifugal multiblade fan
US6007300A (en) * 1996-05-17 1999-12-28 Calsonic Corporation Centrifugal multiblade fan
JP2007255398A (en) * 2006-03-27 2007-10-04 Matsushita Electric Ind Co Ltd Propeller fan and ventilation fan for pipe
EP2031208A2 (en) 2007-08-21 2009-03-04 Same Deutz-Fahr S.P.A. Axial fan for cooling the underhood of a farm machine
EP2031208A3 (en) * 2007-08-21 2012-11-14 Same Deutz-Fahr S.P.A. Axial fan for cooling the underhood of a farm machine
IT202100020579A1 (en) * 2021-07-30 2023-01-30 Cofimco Srl INDUSTRIAL AXIAL FAN

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Legal Events

Date Code Title Description
8139 Disposal/non-payment of the annual fee