EP3683451B1 - Dispositif de guidage de flux et agencement de ventilateur pourvu de dispositif de guidage de flux - Google Patents

Dispositif de guidage de flux et agencement de ventilateur pourvu de dispositif de guidage de flux

Info

Publication number
EP3683451B1
EP3683451B1 EP19216382.2A EP19216382A EP3683451B1 EP 3683451 B1 EP3683451 B1 EP 3683451B1 EP 19216382 A EP19216382 A EP 19216382A EP 3683451 B1 EP3683451 B1 EP 3683451B1
Authority
EP
European Patent Office
Prior art keywords
flow
guiding device
flow guiding
inner diffuser
outer housing
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.)
Active
Application number
EP19216382.2A
Other languages
German (de)
English (en)
Other versions
EP3683451A1 (fr
EP3683451C0 (fr
Inventor
Michael Strehle
Björn Sudler
Daniel Conrad
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
Application filed by Ebm Papst Mulfingen GmbH and Co KG filed Critical Ebm Papst Mulfingen GmbH and Co KG
Publication of EP3683451A1 publication Critical patent/EP3683451A1/fr
Application granted granted Critical
Publication of EP3683451B1 publication Critical patent/EP3683451B1/fr
Publication of EP3683451C0 publication Critical patent/EP3683451C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F04D29/66—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
    • F04D29/663—Sound attenuation
    • F04D29/665—Sound attenuation by means of resonance chambers or interference
    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/4253—Fan casings with axial entry and discharge
    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • 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
    • F04D29/547—Ducts having a special shape in order to influence fluid flow
    • 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
    • F05D2250/19—Two-dimensional machined; miscellaneous
    • F05D2250/191—Two-dimensional machined; miscellaneous perforated

Definitions

  • the invention relates to a flow guide device for use on a blower arrangement with a motor-driven radial blower wheel and the blower arrangement with a corresponding flow guide device.
  • Influencing the flow generated by a radial fan after it exits the radial fan wheel via a flow guide device according to the invention enables an increase in static efficiency. This is particularly advantageous when the radial flow deflected into an axial flow and, for example, a subsequent component such as a heat exchanger is to be subjected to a homogeneous axial outflow field.
  • the invention is based on the objective of providing a flow guidance device with which the static efficiency of blower arrangements with a radial blower wheel, in which the radially blown flow is subsequently deflected axially, is to be increased.
  • a flow guide device for use on a blower assembly with a motor-driven radial fan wheel rotating about an axis of rotation.
  • the device comprises an outer housing and an inner diffuser, between which a flow channel extending along an axial flow direction is formed.
  • the outer housing forms a receiving space adjacent to the inner diffuser in the axial direction for the integral reception of the radial fan wheel, which, during operation, draws in a flow axially and blows it radially into the flow channel.
  • the flow channel is designed to redirect the flow from a radial to an axial direction.
  • the flow direction runs parallel to the axis of rotation of the radial fan wheel.
  • the inner diffuser and the outer housing are preferably cylindrical or substantially cylindrical and arranged coaxially to each other.
  • the flow channel formed downstream in the direction of flow via the outer casing and the inner diffuser, converts the dynamic pressure energy into static pressure energy in the flow, thus solving the problem.
  • the flow channel extends to its outlet.
  • the flow is guided over the entire length of the flow guide device.
  • the conversion of dynamic pressure energy into static pressure energy in the flow guide device is facilitated by the fact that the cross-sectional area of the flow channel increases diffuser-like towards the outlet. This is achieved, for example, by having the inner diffuser taper towards the outlet, i.e., its surface area extends along the axial path to the outlet, towards the axis of rotation of the radial fan wheel.
  • the flow guide device is further characterized in that the receiving space for the radial fan wheel adjoins an inlet of the flow guide device.
  • the flow guide device has a perforated outer surface.
  • an embodiment of the flow guide device is characterized in that the outer housing has a perforated inner wall surface.
  • the flow can pass through the perforations of the outer surface of the inner diffuser or through the inner wall surface of the outer housing.
  • the air can flow completely or partially, reducing acoustic sound radiation.
  • insulating materials can optionally be incorporated, for example, inside the inner diffuser or in parts of the perforations.
  • a further development of the flow guide device to further increase the static efficiency also provides for the arrangement of flow guide vanes spaced at circumferential intervals within the flow channel.
  • the flow guide vanes preferably extend from the area of the receiving chamber for the radial fan wheel to the outlet and provide guidance for the flow from the discharge of the radial fan wheel to the outlet of the flow guide device.
  • the increase in static efficiency is promoted by the reduction of swirl in the flow caused by the flow guide vanes.
  • the inner diffuser also has a diffuser chamber, separated from the flow channel by its outer surface, which is formed around the axis of rotation of the radial fan wheel.
  • Guide vanes are also provided in this diffuser chamber, extending towards the outlet.
  • Such guide vanes are advantageous if the outer surface of the inner diffuser is not closed, but perforated according to the invention, so that the flow passes not only through the flow channel but also partially through the diffuser chamber.
  • the guide vanes can simultaneously serve as stiffening ribs for the inner diffuser.
  • an advantageous design of the flow guide device is one in which the flow guide vanes are integrally formed in one piece with the inner diffuser.
  • a compact design is also advantageous, at which has an integrated motor mount in the inner diffuser.
  • the flow guide device also provides that the outer housing has an integral Venturi nozzle at the inlet.
  • the radial fan wheel can thus interact with the Venturi nozzle on the outer housing and, for example, extend its cover plate axially into the Venturi nozzle to provide axial overlap.
  • the inner diffuser is designed as a removable insert in the outer housing.
  • the flow channel or the receiving space for the radial fan wheel can be adapted as desired by replacing the inner diffuser.
  • a blower arrangement with a radial blower wheel and an associated electric motor is included, wherein the radial blower wheel is arranged in the receiving space of the flow guide device according to the preceding disclosure and its axially drawn-in flow is deflected into an axial flow via the flow channel.
  • Figure 1 shows a first embodiment of the flow guide device 1, which has a cylindrical outer housing 2 and a substantially cylindrical inner diffuser 3 arranged coaxially to the outer housing 2.
  • the inner diffuser extends axially along the axis of rotation RA over approximately half the axial length of the outer housing 2.
  • the outer housing 2 forms an inlet 8 for drawing in a flow via a radial fan wheel (not shown).
  • a Venturi nozzle 11 is formed at the inlet 8.
  • the outer housing 2 Adjoining the inlet 8 in the flow direction and axially adjacent to the inner diffuser 3, the outer housing 2 has a receiving chamber 5 for the integral reception of the radial fan wheel in such a way that it draws in the flow axially at the inlet 8 via the Venturi nozzle 11 and blows it out radially into the flow channel 4.
  • the flow channel 4 is formed by the inner wall of the outer housing 2 and by the surface of the inner diffuser 3 and deflects the flow exiting radially from the radial fan wheel in an axial direction.
  • the inner diffuser 3 is conical towards the axis of rotation RA.
  • the inner diffuser 3 is designed to be conically tapered, thus increasing the cross-sectional area of the flow channel 4 in the direction of flow.
  • the outer housing 2 can also widen to increase the cross-sectional area of the flow channel.
  • the inner diffuser 3 is not conically tapered towards the axis of rotation RA, but rather cylindrical, i.e., parallel to the axis of rotation. The inner diffuser 3 and the outer housing 2 terminate at the outlet 9 in the same axial plane.
  • a motor mount 15 for the secure attachment of an electric motor (not shown) for driving the radial fan wheel of the rotation axis is integrated into the inner diffuser 3 adjacent to the receiving chamber 5.
  • the inner diffuser is multi-walled and provides a chamber 24 between the walls for receiving insulating material, which is subdivided by circumferentially distributed webs 19.
  • connection plate 14 with circumferentially distributed stiffening struts 15 and the circumferentially distributed fastening tabs 12 can also be seen on the inlet 8 and the outlet 9.
  • the Figures 5 - 8 show an embodiment of the invention which, in addition to other features, has the same characteristics as the embodiment according to the Figures 1 - 4
  • the outer housing 2 has a perforated inner wall surface with a plurality of openings 32, as a further development of the first embodiment.
  • the outer surface of the inner diffuser 3 is also perforated with openings 31, so that a flow connection to the chamber 24 is formed.
  • the inner wall of the inner diffuser 3 is closed; however, it can alternatively also be provided with openings, so that a flow connection to the diffuser chamber 29 is established.
  • Guide vanes 13 are already provided in the diffuser chamber 29, extending towards the outlet 9.
  • the guide vanes 13 also serve as stiffening ribs for the inner diffuser.
  • flow guide vanes 7 are arranged circumferentially spaced in the flow channel 4, extending from the area of the receiving chamber 5 for the radial fan wheel to the outlet 9, as can be clearly seen in Fig. 6
  • the flow guide vanes 7 extend radially from the outer surface of the inner diffuser 3 to the inner wall surface of the outer housing 2.
  • a perforated outer surface of the inner diffuser 3 and a perforated inner wall surface of the outer housing 2 can be used, but without the use of flow guide vanes 7.
  • the flow guide vanes 7 can be designed according to the Figures 1-4 They can be integrated without this being explicitly shown separately.

Landscapes

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

Claims (13)

  1. Dispositif de guidage de flux (1) destiné à être utilisé sur un agencement de ventilateur avec une roue de ventilateur radiale motorisée tournant autour d'un axe de rotation (RA), comprenant un boîtier extérieur (2) et un diffuseur intérieur (3) entre lesquels est formé un canal de flux (4) s'étendant le long d'une direction de flux axiale, dans lequel le boîtier extérieur (2) forme un espace de réception adjacent au diffuseur intérieur (3) dans la direction axiale pour la réception intégrale de la roue de ventilateur radiale, qui, en fonctionnement, aspire un flux axialement et le souffle radialement dans le canal de flux (4), dans lequel le canal de flux (4) est conçu pour rediriger le flux d'une direction radiale vers une direction axiale, dans lequel le diffuseur intérieur (3) est à parois multiples et fournit une chambre (24) entre les parois pour recevoir un matériau isolant, subdivisée par des nervures (19) réparties circonférentiellement, caractérisé en ce que le diffuseur interne (3) présente une surface extérieure perforée, dans lequel le diffuseur interne (3) présente un espace de diffusion (29) délimité par rapport au canal d'écoulement (4) par sa surface extérieure, dans lequel des aubes directrices (13) s'étendent en direction d'une sortie (9) du dispositif de guidage d'écoulement (1).
  2. Dispositif de guidage de flux selon la revendication 1, caractérisé en ce que le canal de flux (4) s'étend en continu de l'espace de réception (5) jusqu'à la sortie (9) du dispositif de guidage de flux (1).
  3. Dispositif de guidage de flux selon la revendication 2, caractérisé en ce que la section transversale de flux du canal de flux (4) augmente de manière similaire à un diffuseur vers la sortie (9).
  4. Dispositif de guidage de flux selon l'une quelconque des revendications précédentes, caractérisé en ce que l'espace de réception (5) pour la roue de ventilateur radiale est adjacent à une entrée du dispositif de guidage de flux (1).
  5. Dispositif de guidage de flux selon l'une quelconque des revendications précédentes, caractérisé en ce que le boîtier extérieur (2) présente une surface de paroi intérieure perforée.
  6. Dispositif de guidage de flux selon l'une quelconque des revendications précédentes, caractérisé en ce que des aubes de guidage de flux (7) sont disposées de manière espacée dans la direction circonférentielle dans le canal de flux (4).
  7. Dispositif de guidage de flux selon la revendication précédente, caractérisé en ce que les aubes de guidage de flux (7) s'étendent de la zone de l'espace de réception (5) pour la roue de ventilateur radiale jusqu'à la sortie (9).
  8. Dispositif de guidage de flux selon l'une des revendications précédentes 6 ou 7, caractérisé en ce que les aubes de guidage de flux (7) sont formées d'une seule pièce avec le diffuseur intérieur (3).
  9. Dispositif de guidage de flux selon l'une des revendications précédentes, caractérisé en ce qu'un support moteur est intégré dans le diffuseur intérieur (3).
  10. Dispositif de guidage de flux selon l'une quelconque des revendications précédentes, caractérisé en ce que le boîtier extérieur (2) comporte une buse Venturi (11) intégrée à l'entrée.
  11. Dispositif de guidage de flux selon l'une quelconque des revendications précédentes, caractérisé en ce que le diffuseur intérieur (3) est conçu comme un insert amovible dans le boîtier extérieur (2).
  12. Dispositif de guidage de flux selon l'une quelconque des revendications précédentes, caractérisé en ce que le diffuseur intérieur (3) et le boîtier extérieur (2) sont essentiellement cylindriques.
  13. Agencement de ventilateur avec une roue de ventilateur radiale et un moteur électrique relié à celle-ci, dans lequel la roue de ventilateur radiale est disposée dans l'espace de réception du dispositif de guidage de flux (1) selon l'une quelconque des revendications précédentes.
EP19216382.2A 2019-01-16 2019-12-16 Dispositif de guidage de flux et agencement de ventilateur pourvu de dispositif de guidage de flux Active EP3683451B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019101096.9A DE102019101096A1 (de) 2019-01-16 2019-01-16 Strömungsleitvorrichtung und Gebläseanordnung mit Strömungsleitvorrichtung

Publications (3)

Publication Number Publication Date
EP3683451A1 EP3683451A1 (fr) 2020-07-22
EP3683451B1 true EP3683451B1 (fr) 2026-01-28
EP3683451C0 EP3683451C0 (fr) 2026-01-28

Family

ID=68917508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19216382.2A Active EP3683451B1 (fr) 2019-01-16 2019-12-16 Dispositif de guidage de flux et agencement de ventilateur pourvu de dispositif de guidage de flux

Country Status (4)

Country Link
US (1) US11976668B2 (fr)
EP (1) EP3683451B1 (fr)
CN (1) CN210122970U (fr)
DE (1) DE102019101096A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD972110S1 (en) * 2019-01-16 2022-12-06 Ebm-Papst Mulfingen Gmbh & Co. Kg Fan part

Citations (1)

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FR2922610A1 (fr) * 2007-10-18 2009-04-24 Technofan Sa Ventilateur a volume de traitement acoustique

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DE202010016820U1 (de) * 2010-12-21 2012-03-26 Ebm-Papst Mulfingen Gmbh & Co. Kg Diffusor für einen Ventilator sowie Ventilatoranordnung mit einem derartigen Diffusor
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Also Published As

Publication number Publication date
CN210122970U (zh) 2020-03-03
EP3683451A1 (fr) 2020-07-22
US11976668B2 (en) 2024-05-07
DE102019101096A1 (de) 2020-07-16
US20200224667A1 (en) 2020-07-16
EP3683451C0 (fr) 2026-01-28

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