EP1211426A2 - Boítier d'un ventilateur, en particulier pour ventilateur axial - Google Patents

Boítier d'un ventilateur, en particulier pour ventilateur axial Download PDF

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Publication number
EP1211426A2
EP1211426A2 EP01127602A EP01127602A EP1211426A2 EP 1211426 A2 EP1211426 A2 EP 1211426A2 EP 01127602 A EP01127602 A EP 01127602A EP 01127602 A EP01127602 A EP 01127602A EP 1211426 A2 EP1211426 A2 EP 1211426A2
Authority
EP
European Patent Office
Prior art keywords
fan housing
contour
housing according
blow
fan
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.)
Granted
Application number
EP01127602A
Other languages
German (de)
English (en)
Other versions
EP1211426B1 (fr
EP1211426A3 (fr
Inventor
Walter Georg Dr. Angelis
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.)
Ebm Papst St Georgen GmbH and Co KG
Original Assignee
Papst Motoren GmbH and Co KG
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 Papst Motoren GmbH and Co KG filed Critical Papst Motoren GmbH and Co KG
Publication of EP1211426A2 publication Critical patent/EP1211426A2/fr
Publication of EP1211426A3 publication Critical patent/EP1211426A3/fr
Application granted granted Critical
Publication of EP1211426B1 publication Critical patent/EP1211426B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts
    • 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
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/914—Device to control boundary layer

Definitions

  • the present invention relates to a fan housing with a flow passage a suction opening on one side and a discharge opening on the other side.
  • Fans are often used for applications in which there is a very evenly, in particular over the entire flow cross-section if possible laminar airflow arrives.
  • axial fans are used in printing machines used especially in a row next to each other to make large sheets of paper to apply an air flow from above after the printing process, so that these sheets can be placed on a pile of paper faster.
  • the highest possible fluid-mechanical surface pressure is to be created that acts on the bow, thereby the gravitational force when depositing the Supports arches and therefore those on the underside of the arch and when storing it pushes out obstructive air between the sheet to be deposited and the sheet last deposited.
  • the placement speed and placement quality have a direct influence on the Economy of a printing press, since it reduces the throughput speed of the Determine the printing press significantly. An improvement in storage and one For this reason, increasing the filing speed would have a direct increase the machine economy.
  • the present invention has for its object to provide a fan housing described, generic type with respect to the flow properties to improve the conveyed air flow, in particular in such a way that a the fan housing according to the invention is particularly suitable for the Use in printing machines described above is suitable.
  • Outflow contour means enclosing the flow cross section are designed in such a way that in an actual air flow that surrounds the fan operation, between the air flow and the surrounding, mostly still air shear layer forming a (large-scale, low-frequency) vortex formation at least is reduced.
  • the invention is based on the knowledge that there is naturally behind each fan Free jet that only forms after a certain distance with the ambient air and / or mixed with the free jet of neighboring fans.
  • This Open jets have the property that they have a relatively low degree of turbulence in the center exhibit. The blown out, moving mixes to the sides Air with the attracted, still air in a shear layer (entrainment effect). in this shear layer exists almost exclusively in large-scale, low-frequency vortex forms. These are long-lasting due to their high energy content.
  • the printed sheet is excited to vibrate at its natural frequency. Under certain circumstances, the natural frequency of the arch correlates with the vertebral detachment frequency. This mechanism prevents the filing speed from increasing and can also lead to intermittent disruptions in the filing process to lead.
  • the drawing figures show an axial fan housing 1 with an axial one Flow passage 2 with a suction opening 4 on one side and an opposite one Blow-out opening 6.
  • the suction opening 4 and the blow-out opening 6 have each have a circular outer contour. This essentially results in one annular configuration of the axial fan housing 1 (so-called wall ring).
  • Within the flow passage 2 are central holding means 8 for one Motor / fan wheel unit shown arranged, the holding means 8 via spoke-like Connecting elements 10 are connected to the outer housing ring.
  • Within the fan housing 1 is thus an annular or circular disk-shaped Flow cross section formed.
  • outflow contour means 12 enclosing its flow cross section are formed in the region of the blow-out opening 6.
  • These outflow contour means 12 consist of individual contour elements 14 which are distributed over the circumference of the blow-out opening 6 and which, starting from the edge area of the blow-out opening 6, at least partially protrude into the area of a flow shear layer which arises during operation and surrounds the actual air flow.
  • the contour elements 14 are designed in the manner of crown teeth, each with an approximately triangular contour. However, other polygonal and / or rounded contours can also be provided.
  • the contour elements 14 are fixed with a base (in the illustrated case a triangular base) at the opening edge of the blow-out opening 6 or in the region of the housing end face which surrounds it, while with their opposite tip or edge (as shown in their triangular shape) Tip) protrude axially in the direction of flow on the one hand and radially inwards or outwards on the other hand.
  • all contour elements 14 are oriented obliquely axially and radially inwards, namely at an angle ⁇ 1 to the radial plane (plane of the blow-out opening 6 or the housing end face) starting from the peripheral region of the blow-out opening 6.
  • part of the contour elements 14 are oriented obliquely axially and radially outwards at an angle ⁇ 2 .
  • contour elements 14, which protrude radially inwards at an angle ⁇ 1 and radially outwards at an angle ⁇ 2 are preferably provided in the circumferential direction.
  • angles ⁇ 1 and ⁇ 2 can be the same or different.
  • the respective angle ⁇ 1 or ⁇ 2 is in the range between 0 ° and 90 ° and - like the number, size and contour shape of the contour elements 14 - can be adapted and matched to the respective application, a combination of contour elements also being provided can differ from one another in shape and / or size and / or angular orientation.
  • FIG. 5 and 6 contain an example of a comparison of the mode of operation of a non-inventive embodiment (FIG. 5) without outflow contour means 12 and the inventive embodiment according to FIGS. 1 and 2 (FIG. 6).
  • FIG. 5 illustrates that in the case of a conventional “normal” axial fan, an outer shear layer 16a is created, which encloses an inner, undisturbed flow 18.
  • This outer shear layer 16a has a relatively large radially measured thickness d 1 and contains large-scale vortices and a large proportion of low-frequency excitation components. This leads to a relatively unstabilized air jet.
  • FIG. 5 illustrates that in the case of a conventional “normal” axial fan, an outer shear layer 16a is created, which encloses an inner, undisturbed flow 18.
  • This outer shear layer 16a has a relatively large radially measured thickness d 1 and contains large-scale vortices and a large proportion of low-frequency excitation components. This leads to a relatively
  • the invention results in a shear layer 16b with a smaller thickness d 2 and therein in a significant reduction in large-scale eddies, in a reduction in the low-frequency excitation components and thus in total in a stabilized air-free jet because the portion the undisturbed flow 18 is enlarged in relation to the entire flow cross section.
  • the invention is not based on the illustrated and described exemplary embodiments limited, but also includes all those having the same effect within the meaning of the invention Versions. Furthermore, the invention is not yet based on the claims 1 defined combination of features limited, but can also by any different combination of certain features of all of the total disclosed Individual characteristics must be defined. This means that basically everything Individual feature of claim 1 omitted or by at least one other Instead of the disclosed individual feature can be replaced. insofar is claim 1 merely as a first attempt at formulation for an invention to understand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP01127602A 2000-12-01 2001-11-20 Boîtier d'un ventilateur, en particulier pour ventilateur axial Expired - Lifetime EP1211426B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20020512 2000-12-01
DE20020512U 2000-12-01

Publications (3)

Publication Number Publication Date
EP1211426A2 true EP1211426A2 (fr) 2002-06-05
EP1211426A3 EP1211426A3 (fr) 2003-07-23
EP1211426B1 EP1211426B1 (fr) 2006-06-07

Family

ID=7949615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01127602A Expired - Lifetime EP1211426B1 (fr) 2000-12-01 2001-11-20 Boîtier d'un ventilateur, en particulier pour ventilateur axial

Country Status (4)

Country Link
US (1) US6659719B2 (fr)
EP (1) EP1211426B1 (fr)
AT (1) ATE329157T1 (fr)
DE (2) DE20118939U1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI290978B (en) * 2005-11-18 2007-12-11 Delta Electronics Inc Fan and fan housing with toothed-type connecting elements
US20080273961A1 (en) 2007-03-05 2008-11-06 Rosenkrans William E Flutter sensing and control system for a gas turbine engine
US20100316493A1 (en) * 2007-03-23 2010-12-16 Flodesign Wind Turbine Corporation Turbine with mixers and ejectors
US8657572B2 (en) 2007-03-23 2014-02-25 Flodesign Wind Turbine Corp. Nacelle configurations for a shrouded wind turbine
US8714923B2 (en) * 2007-03-23 2014-05-06 Ogin, Inc. Fluid turbine
US20110085901A1 (en) * 2007-03-23 2011-04-14 Presz Jr Walter M Shrouded wind turbine with scalloped lobes
US20110002781A1 (en) * 2007-03-23 2011-01-06 Flodesign Wind Turbine Corporation Wind turbine with pressure profile and method of making same
US8021100B2 (en) * 2007-03-23 2011-09-20 Flodesign Wind Turbine Corporation Wind turbine with mixers and ejectors
US20110027067A1 (en) * 2007-03-23 2011-02-03 Flodesign Wind Turbine Corporation Coated shrouded wind turbine
US20110135458A1 (en) * 2007-03-23 2011-06-09 Presz Jr Walter M Fluid turbine with shroud having segmented lobes
US20100270802A1 (en) * 2007-03-23 2010-10-28 Flodesign Wind Turbine Corporation Wind turbine
US20110008164A1 (en) * 2007-03-23 2011-01-13 Flodesign Wind Turbine Corporation Wind turbine
US20110014038A1 (en) * 2007-03-23 2011-01-20 Flodesign Wind Turbine Corporation Wind turbine with skeleton-and-skin structure
US8622688B2 (en) * 2007-03-23 2014-01-07 Flodesign Wind Turbine Corp. Fluid turbine
US20100314885A1 (en) * 2007-03-23 2010-12-16 Flodesign Wind Turbine Corporation Shrouded wind turbine with rim generator and halbach array
EP2371050A2 (fr) * 2008-12-02 2011-10-05 Flodesign Wind Turbine Corporation Interface à supercondensateur dans une génératrice annulaire d'éolienne
DE102009015104A1 (de) * 2009-03-31 2010-10-14 Behr Gmbh & Co. Kg Axiallüfter, insbesondere für ein Kraftfahrzeug
RU2012138698A (ru) * 2010-02-11 2014-03-20 Флоудизайн Винд Тербин Корп. Турбина для текучей среды
KR101921775B1 (ko) 2011-05-25 2018-11-23 로베르트 보쉬 게엠베하 소음 감소용 형상의 하류 에지를 구비한 팬 덕트
JP6551173B2 (ja) * 2015-11-09 2019-07-31 株式会社デンソー 遠心送風機
US20170211589A1 (en) * 2016-01-22 2017-07-27 Minebea Co., Ltd. Axial Fan

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1752427A (en) * 1923-06-09 1930-04-01 Elisha N Fales Device for improving the aerodynamic efficiency of an exhauster fan
US3531221A (en) * 1967-08-23 1970-09-29 Papst Motoren Kg Ventilator with axial propeller wheel
FR2358550A1 (fr) * 1976-07-16 1978-02-10 Milloux Maurice Dispositif pour elever le rendement d'une helice
US5393197A (en) * 1993-11-09 1995-02-28 Lemont Aircraft Corporation Propulsive thrust ring system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53115912A (en) * 1977-03-18 1978-10-09 Matsushita Electric Ind Co Ltd Electric blower
FR2736400B1 (fr) * 1995-07-05 1997-09-19 Gec Alsthom Transport Sa Motoventilateur de refroidissement
GB9925193D0 (en) * 1999-10-26 1999-12-22 Rolls Royce Plc Gas turbine engine exhaust nozzle
US6502383B1 (en) * 2000-08-31 2003-01-07 General Electric Company Stub airfoil exhaust nozzle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1752427A (en) * 1923-06-09 1930-04-01 Elisha N Fales Device for improving the aerodynamic efficiency of an exhauster fan
US3531221A (en) * 1967-08-23 1970-09-29 Papst Motoren Kg Ventilator with axial propeller wheel
FR2358550A1 (fr) * 1976-07-16 1978-02-10 Milloux Maurice Dispositif pour elever le rendement d'une helice
US5393197A (en) * 1993-11-09 1995-02-28 Lemont Aircraft Corporation Propulsive thrust ring system

Also Published As

Publication number Publication date
DE20118939U1 (de) 2002-04-25
ATE329157T1 (de) 2006-06-15
US20020067988A1 (en) 2002-06-06
EP1211426B1 (fr) 2006-06-07
US6659719B2 (en) 2003-12-09
EP1211426A3 (fr) 2003-07-23
DE50110023D1 (de) 2006-07-20

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