EP4283135A1 - Dispositif de guidage et ventilateur doté d'un dispositif de guidage - Google Patents

Dispositif de guidage et ventilateur doté d'un dispositif de guidage Download PDF

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Publication number
EP4283135A1
EP4283135A1 EP23174570.4A EP23174570A EP4283135A1 EP 4283135 A1 EP4283135 A1 EP 4283135A1 EP 23174570 A EP23174570 A EP 23174570A EP 4283135 A1 EP4283135 A1 EP 4283135A1
Authority
EP
European Patent Office
Prior art keywords
leading edge
air guide
fan
guide device
wave
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.)
Pending
Application number
EP23174570.4A
Other languages
German (de)
English (en)
Inventor
Oliver Haaf
Thorsten Pissarczyk
Daniel Gebert
Patrick HEINECKE
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 Mulfingen GmbH and Co KG
Original Assignee
Ebm Papst Mulfingen 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
Priority claimed from DE102022113141.6A external-priority patent/DE102022113141A1/de
Priority claimed from DE102022113142.4A external-priority patent/DE102022113142A1/de
Application filed by Ebm Papst Mulfingen GmbH and Co KG filed Critical Ebm Papst Mulfingen GmbH and Co KG
Publication of EP4283135A1 publication Critical patent/EP4283135A1/fr
Pending 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
    • F04D29/32—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
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • F04D29/542—Bladed diffusers
    • F04D29/544—Blade shapes
    • 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
    • F05D2240/10—Stators
    • F05D2240/12—Fluid guiding means, e.g. vanes
    • F05D2240/121—Fluid guiding means, e.g. vanes related to the leading edge of a stator vane
    • 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
    • F05D2250/00—Geometry
    • F05D2250/10—Two-dimensional
    • F05D2250/18—Two-dimensional patterned
    • F05D2250/184—Two-dimensional patterned sinusoidal

Definitions

  • the present invention relates to a guide device and a fan with a guide device, in particular a radial fan, an axial fan or diagonal fan with such a guide device.
  • Fans are used in many areas. There are many applications in which the air flow is highly turbulent. The turbulent flow from the fan leads to a significant increase in sound radiation, which means annoying noise development. With current fans or fan wheels, fan blades that are shaped in a fluid-mechanically favorable manner enable high performance, particularly with regard to the flow volume achieved or the pressure build-up. Basically, there is a need for low-noise fans with good aerodynamics at the same time, despite turbulent flow. However, strong noise development during operation of a fan, particularly that caused by rotor-stator interaction, often remains problematic.
  • the DE 10326637 B3 describes another solution, namely a fan with alternating direction of rotation, which has S-shaped sickle blades with a leading edge that recedes sharply towards the outside. Jagged or wavy trailing edges are used to reduce trailing edge noise (e.g GB2497739 or EP 1801422 A2 ).
  • the DE 102009044824 A1 uses porosities in the form of holes in the area of the trailing edge to reduce the generation of sound at the trailing edge. Wavy or jagged leading edges are also known as a means of reducing noise in turbulent flow.
  • the invention deals with the problem of providing a fan that operates particularly quietly.
  • the invention solves this problem with a fan according to the independent claims.
  • the dependent claims contain advantageous refinements.
  • the invention relates to a solution consisting of an axial fan, diagonal fan or radial fan and a follow-up device modified according to the invention.
  • Guide devices in the sense of the present invention are bladed guide grilles which are arranged on the downstream side after the fan to guide air.
  • fan blades arranged in a star shape on a central hub for the fluidic suction and/or pressure of the air surrounding the fan or a gas to be conveyed by the fan.
  • the fan blades can be connected to one another by a circumferential ring (slinger ring) on the radially outermost profile surface.
  • each fan blade has a front leading edge, which leads in the intended direction of rotation during operation, and a rear trailing edge, which lags behind in the intended direction of rotation during operation of the fan.
  • there is a suction side and a pressure side with the suction side typically being on the convex side and the pressure side typically being on the concave side of the fan blade.
  • the leading and trailing edges are usually only optimally shaped for one direction of rotation.
  • the fan blade has a suction side, which sucks in the incoming air during operation, and a pressure side opposite the suction side, on which the pressure to expel the air builds up. The tracking device follows on this page.
  • the leading edge of the respective air guide blade of the guide device therefore faces the fan, while the trailing edge of the air guide blade of the guide device facing away from the fan.
  • leading edge of the air guide blades of the guide device has, at least in sections, a specific three-dimensional (or two-dimensional) wave-shaped shape or is correspondingly designed to be three- or two-dimensional wave-shaped.
  • a guide device for a fan, the guide device having a plurality of air guide vanes arranged (preferably in a star shape at a central position, for example around a central axis), each with a leading edge and a trailing edge, the wing profile of which is curved and / or twisted is, wherein the respective air guide vane has, at least in a partial area, a jagged or wavy leading edge with a preferably periodically repeating wave shape.
  • a non-periodic waveform can also be selected.
  • the wave course of the wave crests and wave troughs which is formed by the wave shape, extends essentially or completely in the plane formed by the respective air guide vane in the area of the leading edge and/or extends substantially along the wave crests a tangent extends along the surface of the air deflector in the area of the respective wave crest.
  • the wing profile in the surface course on the leading edge is not modified by the wave shape according to the invention, but rather the leading edge itself.
  • the corrugated leading edge of the air guide blades has several or a large number of periodically repeating wave sections or wave shapes.
  • the wave trough is advantageously rounded or rounded off.
  • leading edge of the air guide blades has a wavy or jagged edge shape essentially over the entire course of the blade, but at least over a contiguous partial area of more than 20%, preferably more than 50% of the length of the air guide blades in the radial direction or Span direction considered.
  • leading edge of the air guide blades has areas with non-corrugated edge profiles between or next to the corrugated profiles, but at least over a contiguous partial area a profile as described above.
  • the profile of the air guide blades viewed at least in a profile section in the area of a wave crest, each has a dent protruding from the top and a dent extending into the underside or vice versa.
  • the present invention relates in particular to an axial or diagonal fan, as well as a radial fan, which each has a guide device as described above or one or more air guide vanes downstream of the fan in the flow direction.
  • the following advantages and features are associated with the invention.
  • the special design of the front edge of the guide device with the modification described is fundamentally aimed at different sound generation mechanisms than modifications to the trailing edge or trailing edge.
  • the advantage of the invention, in contrast to the trailing edge modification, is that it explicitly reduces the noise generated by the interaction of the impeller and stator.
  • the front edge modification described is also designed for axial or diagonal fans with a centrifugal ring.
  • the front edge modification described is also designed for centrifugal or diagonal fans with a cover plate.
  • the invention can also be used to reduce noise in typical flow situations (no head gap vortex, increased tangential components due to the closed ring, backflow in the outside area and wake effects of the gap flow) and in addition to the points mentioned below by reducing the resulting interaction mechanisms.
  • FIGS. 1 to 4 show alternative embodiments of a guide device 1 with air guide vanes L, each with a corrugated leading edge 2, 4.
  • the guide devices 1 shown are designed for a fan, the respective guide device 1 having several air guide vanes L arranged in a star shape at a central position P, each with a leading edge 2, 4 (leading edge) and a trailing edge 3 (trailing edge), the air guide vane L being at least in a partial area each has a jagged or wavy leading edge 4 with a wave shape.
  • the air guide vanes L are fastened on the inside to the central ring 10 (or a mounting body 10 as shown in the figures) and run radially outwards to a circumferential ring 11.
  • a mounting flange 12 can also be provided on the circumferential ring 11, as shown in the figures be.
  • the corrugated leading edge 4 of an air guide vane L has a detailed view of the Figure 5 clearly visible, several or a large number of periodically repeating waveforms and in this exemplary embodiment runs along the entire length of the air guide blade L.
  • the Figure 6 shows a section of an alternative air guide blade L in which the leading edge 2, 4 has a wavy course only in the partial area with the reference number 4 (thus partially).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP23174570.4A 2022-05-24 2023-05-22 Dispositif de guidage et ventilateur doté d'un dispositif de guidage Pending EP4283135A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022113141.6A DE102022113141A1 (de) 2022-05-24 2022-05-24 Nachleiteinrichtung sowie Ventilator mit Nachleiteinrichtung
DE102022113142.4A DE102022113142A1 (de) 2022-05-24 2022-05-24 Nachleiteinrichtung sowie Ventilator mit Nachleiteinrichtung

Publications (1)

Publication Number Publication Date
EP4283135A1 true EP4283135A1 (fr) 2023-11-29

Family

ID=86497978

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23174570.4A Pending EP4283135A1 (fr) 2022-05-24 2023-05-22 Dispositif de guidage et ventilateur doté d'un dispositif de guidage

Country Status (2)

Country Link
US (1) US20230383763A1 (fr)
EP (1) EP4283135A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416725A (en) 1967-10-12 1968-12-17 Acme Engineering And Mfg Corp Dihedral bladed ventilating fan
DE19948075A1 (de) 1998-10-08 2000-05-25 Gate Spa Axial-Lüfterrad, insbesondere für Motorfahrzeuge
DE10326637B3 (de) 2003-06-11 2005-01-13 Bayerische Motoren Werke Ag Kühlvorrichtung für ein Kraftfahrzeug
DE102006020479A1 (de) * 2005-11-18 2007-05-24 Delta Electronics, Inc., Kuei San Lüfter und Lüftergehäuse mit zahnförmigen Verbindungselementen
EP1801422A2 (fr) 2005-12-22 2007-06-27 Ziehl-Abegg AG Ventilateur et aube de ventilateur
DE102009044824A1 (de) 2008-12-11 2010-06-17 Zhongshan Broad-Ocean Motor Co., Ltd. Lüfterflügel
GB2497739A (en) 2011-12-19 2013-06-26 Rolls Royce Plc Rotor blade with serrated trailing edge
US20130164488A1 (en) * 2011-12-22 2013-06-27 General Electric Company Airfoils for wake desensitization and method for fabricating same
CN105736474A (zh) * 2016-03-31 2016-07-06 广东美的制冷设备有限公司 轴流柜机的静叶、导流组件和轴流柜机
EP3255281A1 (fr) * 2016-06-08 2017-12-13 Ziehl-Abegg Se Ventilateur avec aubes de diffuseur tandem

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416725A (en) 1967-10-12 1968-12-17 Acme Engineering And Mfg Corp Dihedral bladed ventilating fan
DE19948075A1 (de) 1998-10-08 2000-05-25 Gate Spa Axial-Lüfterrad, insbesondere für Motorfahrzeuge
DE10326637B3 (de) 2003-06-11 2005-01-13 Bayerische Motoren Werke Ag Kühlvorrichtung für ein Kraftfahrzeug
DE102006020479A1 (de) * 2005-11-18 2007-05-24 Delta Electronics, Inc., Kuei San Lüfter und Lüftergehäuse mit zahnförmigen Verbindungselementen
EP1801422A2 (fr) 2005-12-22 2007-06-27 Ziehl-Abegg AG Ventilateur et aube de ventilateur
DE102009044824A1 (de) 2008-12-11 2010-06-17 Zhongshan Broad-Ocean Motor Co., Ltd. Lüfterflügel
GB2497739A (en) 2011-12-19 2013-06-26 Rolls Royce Plc Rotor blade with serrated trailing edge
US20130164488A1 (en) * 2011-12-22 2013-06-27 General Electric Company Airfoils for wake desensitization and method for fabricating same
CN105736474A (zh) * 2016-03-31 2016-07-06 广东美的制冷设备有限公司 轴流柜机的静叶、导流组件和轴流柜机
EP3255281A1 (fr) * 2016-06-08 2017-12-13 Ziehl-Abegg Se Ventilateur avec aubes de diffuseur tandem

Also Published As

Publication number Publication date
US20230383763A1 (en) 2023-11-30

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