EP3256732B1 - Roue pour un ventilateur et ventilateur - Google Patents

Roue pour un ventilateur et ventilateur Download PDF

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Publication number
EP3256732B1
EP3256732B1 EP15830788.4A EP15830788A EP3256732B1 EP 3256732 B1 EP3256732 B1 EP 3256732B1 EP 15830788 A EP15830788 A EP 15830788A EP 3256732 B1 EP3256732 B1 EP 3256732B1
Authority
EP
European Patent Office
Prior art keywords
fan wheel
fan
axial
radial
bottom plate
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
EP15830788.4A
Other languages
German (de)
English (en)
Other versions
EP3256732A1 (fr
Inventor
Daniel Gebert
Jens Mueller
Alexander Konzal
Michael Strehle
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 EP3256732A1 publication Critical patent/EP3256732A1/fr
Application granted granted Critical
Publication of EP3256732B1 publication Critical patent/EP3256732B1/fr
Active 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
    • F04D29/28—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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • 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
    • F04D29/288—Part of the wheel having an ejecting effect, e.g. being bladeless diffuser
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • 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
    • F05D2250/14—Two-dimensional elliptical

Definitions

  • the invention relates to a fan wheel designed as a radial fan or Diagonalventilatorrad and a fan in which a corresponding fan wheel is installed.
  • Such radial fan wheels are preferably in volume flow-conducting elements (eg Air Handling Units) in the ventilation and Air conditioning used. Normally, the characteristics of the radial fan wheels are measured in Kammerprüfclassn in which the extracted air can flow freely radially outward. The air flow is then applied in such an installation situation to the extending in the extension of the radial direction of the fan wheel chamber wall.
  • volume flow-conducting elements eg Air Handling Units
  • the invention is therefore based on the object to provide a fan wheel and a fan that have improved efficiency in the real installation situation.
  • a fan wheel which is designed as a radial fan or Diagonalventilatorrad and has a bottom disc on which is distributed around an axial axis of rotation a plurality of fan blades is arranged, whose axial height extent between the suction side and the bottom disc.
  • the bottom disk has a circumferential radial outer edge portion which, viewed in cross-section, extends in an arc-shaped manner at least in sections and thereby forms a circumferential elliptical transition of the bottom disk from a radial extent into an axial extent.
  • the axial extent runs parallel to the axis of rotation of the fan wheel on one side of the bottom disk, which is opposite the fan blades.
  • the elliptical arc shape of the radially outer edge portion causes a reduction up to the elimination of the losses caused by the installation in a volume flow conducting element.
  • the efficiency is improved by at least 0.1 compared to the known from the prior art radial fan wheels. This has been confirmed in several measurements, as described in more detail below.
  • the cross-sectionally elliptical transition of the circumferential radial outer edge portion is determined by a longer and a shorter half-axis length.
  • the half-axis length ratio a / b lies in a range of 1-10, preferably 2-5, where "a" is a semiaxis length in the radial direction and "b" is a Half-axis length in the axial direction of the fan wheel corresponds.
  • the fan blades arranged or formed on the bottom disk each have a radial outer edge which in each case forms a transition point on one side with the bottom disk.
  • An imaginary ring circumferentially connecting the transition points forms a boundary line to which the elliptical transition of the bottom disc in the radial direction adjoins directly or at a distance, i. the bottom disc extends radially beyond the fan blades, forming the elliptical transition.
  • the flow can thus flow unaffected by the fan blades along the bottom disk, and then be guided in the radial outer region of the elliptical transition with respect to the further flow direction.
  • the bottom disc is formed in one embodiment with an axial extension that abuts then integrally extending the elliptical transition in the axial direction and provides a further guidance for the air flow.
  • the bottom disk has an axial circumferential step in the center region extending radially outside the axis of rotation.
  • This step is formed as a kind of bending of the bottom disk and places the parts of the bottom disk lying in the center area on a parallel axial plane.
  • the step or fold increases the rigidity of the bottom plate and thus the fan wheel. In combination with the elliptical transition, the effect is enhanced.
  • it is additionally achieved by the step or bending in an axial direction away from the fan blades that the rotor of an electric motor to be fixed in the center region of the bottom disk projects less far in the direction of the fan blades.
  • a hub is formed on the bottom plate for this purpose, which adjoins the step in the direction of the axis of rotation in the center.
  • the axial step or bevel of the bottom disk is substantially Z-shaped when viewed in cross-section, with a partially extending in the radial and axial direction, i. formed obliquely to the axis of rotation extending ridge.
  • the oblique circumferential web of the bottom disk connecting the straight upper and lower legs of the "Z" extends at an angle ⁇ of 20-60 DEG from the radial direction of the fan wheel.
  • the step or fold has, in a favorable embodiment, an axial height Z which corresponds to ⁇ 20% of the semiaxis length b of the elliptical transition in the axial direction. This causes the elliptical
  • Transition with the step particularly effective to promote the rigidity of the bottom disc and the fan wheel together.
  • the fan wheel has a cover disk which lies opposite the bottom disk and which at least partially covers the fan blades on the suction side, which forms an inlet opening around the axis of rotation in the center.
  • the fan blades are not completely covered by the cover disk along their upper edges pointing toward the suction side; rather, in one exemplary embodiment, they each have an edge section facing the suction side, which runs separately from the cover disk in order to improve the guided flow.
  • the cover disc and the bottom disc have substantially the same outer diameter. It is provided as a possible variant of the invention that an imaginary around the fan blades in the circumferential direction envelope with respect to a radial extent of the bottom disc at an oblique angle ( ⁇ ) of 60 - 80 runs, i. in a lateral section, the fan blades extend obliquely with respect to an axial plane of the fan wheel and pointing in the direction of the axis of rotation of the bottom disc.
  • a size ratio of the bottom disk has been found to be effective, in which the ratio d / h, ie the outer diameter d of the bottom disk and the overall axial height h, is set in a range of 20-25.
  • the ratio d / a of the outer diameter d of the bottom disc to the half-axis length a of the elliptical transition is in a range of 10-15, preferably 11-12, and the ratio d / b of the outer diameter d of the bottom disc to the half-axis length b of the elliptical transition in a range of 28 - 38, preferably 30 - 34.
  • the from the cover disc certain inlet opening has a diameter sd which, in relation to the semiaxis length b of the elliptical transition, has a value sd / b in a range of 15-25, in particular 18-21, and a value relative to the semiaxis length a of the elliptical transition sd / a is set in a range of 5-8, in particular 6-7.
  • the invention further comprises a fan with a fan wheel described above, which is arranged in a volume flow-conducting component having a preferably square flow cross-section with an edge length G.
  • the ratio of the edge length G to the outer diameter D of the fan wheel is in a range of 1.1-3.0, preferably 1.5 - 2.5 set.
  • FIG. 1 shows a side sectional view of a radial fan wheel 1 with a bottom plate 2 and provided on the suction side 4 and an air inlet opening 14 forming cover plate 13, between which a plurality of distributed around the axial axis of rotation fan blades 3 are provided.
  • the fan blades 3 extend radially and partially diagonally outward on the bottom disk 2 from a central region 10 'and form a radial air outlet region on their radial outer edge 8.
  • the fan blades 3 are each curved in a curved manner, so that they arc-shaped in a plan view and in a region facing the axial center have a free from the cover plate 13 upper edge portion 15.
  • the radially outer edges 8 of the fan blades 3 terminate on the bottom plate 2 each at a transition point 9.
  • the axial oblique extension of the outer edges 8 of the fan blades 3 from the bottom plate 2 to the cover plate 13 is carried out in the embodiment shown with an angle ⁇ of about 70 degrees, wherein the fan blades 3 with the cover plate 13 form a substantially flush radially outer edge termination.
  • an imaginary boundary line forms, to which the elliptical transition 6 of the bottom disk 2 adjoins in the radial direction directly or as closely spaced as in the embodiment shown.
  • the starting point of the elliptical transition 6 in the radial direction is defined as the beginning of the curvature of the bottom disk 2 in the axial direction.
  • the bottom plate 2 has a circumferential radial outer edge portion 5, which, viewed in the lateral cross-section shown extends arcuately and forms the elliptical transition 6 of the bottom plate 2 from its radial extent outward in an axial extension to the fan blades 3 opposite side.
  • the elliptical Transition 6 is determined by the half-axis lengths a and b, whose ratio a / b assumes a value of about 3.0 in the embodiment shown.
  • a central opening 19 is provided in a center 10 about the axis of rotation, at the radially outer edge of the hub 17 is formed.
  • the bottom disk 2 has an axial, essentially Z-shaped step 11, the oblique circumferential web 12 of the "Z" extending radially and partially in the axial direction being opposite the radial one Direction of the fan wheel 1, ie a plane parallel to the bottom plate 2, at an angle ⁇ of about 40 degrees.
  • the stage 11 has, in the embodiment shown, an axial height Z which is approximately 15% greater than the half-axis length b of the elliptical transition 6 in the axial direction.
  • the ratio d / h between the outer diameter d of the bottom disk 2 and its axial total height h is set to a value of approximately 23 in the illustrated embodiment.
  • FIG. 2 shows a schematic representation of a fan 20 with the fan wheel 1 in a centrally mounted to the axis of a volume flow-conducting element 21 state.
  • the volume-flow-conducting element 21 has in the embodiment shown a square cross section with an edge length G, which is greater by a factor of 1.3 than the outer diameter D of the fan wheel first
  • FIG. 2 The in FIG. 2 The structure shown corresponds to a real installation situation of the fan 20 and the fan wheel 1. This is a flow 16 generated with a course, as in FIG. 3 is shown. After being sucked through the suction opening 14, the air is initially blown radially out of the fan wheel 1. Subsequently, the essential part of the flow 16 settles in the axial direction on the inner wall of the volume-flow-conducting element 21 and has thereby completed a change in direction from radially to axially. The flow 26 reached in chamber test stands is applied to a wall 31, which continues in the radial direction of the fan wheel 1, as exemplified in FIG FIG. 4 shown. A diversion does not take place.
  • the invention is not limited in its execution to the above-mentioned preferred embodiments. Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different types of use.
  • the axial extension 7 may also be formed obliquely or arcuately.
  • a change in the material thickness of the bottom plate, for example with a taper in the direction of the axial extension, are provided. The scope of the invention is defined solely by the claims.

Claims (11)

  1. Roue pour un ventilateur réalisée en tant que roue pour ventilateur radial ou roue pour ventilateur diagonal, avec un disque de fond (2) et une pluralité d'aubes de ventilateur (3) agencées sur le disque de fond (2) distribuées autour d'un axe de rotation axial, dont l'extension en hauteur axiale s'étend entre un côté aspiration (4) et le disque de fond (2), dans laquelle le disque de fond (2) présente une section de bord extérieur radiale périphérique (5), qui s'étend au moins par section en arc vu dans la section transversale et forme ce faisant une transition elliptique (6) du disque de fond (2) d'une extension radiale à une extension axiale, dans laquelle les aubes de ventilateur (3) présentent respectivement une arête extérieure radiale (8), qui forment respectivement un point de transition (9) sur un côté avec le disque de fond (2), et un anneau imaginaire reliant les points de transition (9) dans la direction périphérique forme une ligne limite à laquelle la transition elliptique (6) du disque de fond (2) se raccorde directement ou à distance dans la direction radiale, dans laquelle le disque de fond (2) présente dans une zone centrale (10') située radialement à l'extérieur de l'axe de rotation, un gradin axial (11) s'éloignant dans la direction axiale des aubes de ventilateur (3), qui est réalisé vu dans la section transversale sensiblement en forme de Z avec une branche (12) s'étendant en partie dans la direction radiale et axiale, qui s'étend selon un angle (α) de 20 - 60 degrés par rapport à la direction radiale de la roue pour ventilateur.
  2. Roue pour un ventilateur selon la revendication 1, caractérisée en ce que la transition elliptique (6) présente dans la section de bord extérieur radiale périphérique (5) du disque de fond (2), un rapport de longueur de demi-axe (a)/(b) dans une plage de 1 - 10, en particulier de 2 - 5, dans laquelle (a) correspond à une longueur de demi-axe dans la direction radiale et (b) à une longueur de demi-axe dans la direction axiale de la roue pour ventilateur (1).
  3. Roue pour un ventilateur selon la revendication 1 ou 2, caractérisée en ce qu'un prolongement axial (7) est réalisé d'un seul tenant au niveau de la transition elliptique (6) dans la direction radiale.
  4. Roue pour un ventilateur selon la revendication 1, caractérisée en ce qu'un moyeu (17), qui se raccorde au gradin (11) dans la direction radiale, est réalisé au niveau du disque de fond (2).
  5. Roue pour un ventilateur selon la revendication 1 ou 4, caractérisée en ce que l'étage (11) présente une hauteur axiale (Z), qui correspond à ± 20 % de la longueur de demi-axe (b) de la transition elliptique (6) dans la direction axiale.
  6. Roue pour un ventilateur selon au moins l'une quelconque des revendications précédentes, caractérisée en ce qu'elle présente un disque de recouvrement (13) opposé au disque de fond (2) et recouvrant au moins par section les aubes de ventilateur (3) sur le côté aspiration (4), qui forme une ouverture d'entrée (14) s'étendant autour de l'axe de rotation,
  7. Roue pour un ventilateur selon la revendication précédente, caractérisée en ce que les aubes de ventilateur (3) présentent respectivement une section de bord (15) dirigée vers le côté aspiration (4), qui s'étend séparément du disque de recouvrement (13).
  8. Roue pour un ventilateur selon au moins l'une quelconque des revendications précédentes, caractérisée en ce qu'une courbe enveloppe imaginaire dans la direction périphérique autour des aubes de ventilateur (3) s'étend selon un angle oblique (β) de 60 - 80 degrés par rapport à une extension radiale du disque de fond (2).
  9. Roue pour un ventilateur selon au moins l'une quelconque des revendications précédentes, caractérisée en ce qu'un rapport (d)/(h) d'un diamètre extérieur (d) du disque de fond (2) par rapport à une hauteur totale axiale (h) du disque de fond (2) est fixé dans une plage de 20 - 25.
  10. Roue pour un ventilateur selon au moins l'une quelconque des revendications précédentes, caractérisée en ce qu'un rapport (d)/(a) du diamètre extérieur (d) du disque de fond (2) par rapport à la longueur de demi-axe (a) de la transition elliptique (6) est fixé dans une plage de 10-15, en particulier 11 - 12.
  11. Ventilateur avec une roue pour un ventilateur selon au moins l'une quelconque des revendications précédentes, dans lequel le ventilateur (20) est agencé dans un composant conducteur de débit volumique (21) avec une section transversale d'écoulement carré avec une longueur d'arête (G), et un rapport de la longueur d'arête (G) par rapport à un diamètre extérieur (D) de la roue pour ventilateur est fixé dans une plage de 1,1 - 3,0, en particulier de 1,5 - 2,5.
EP15830788.4A 2015-02-11 2015-12-30 Roue pour un ventilateur et ventilateur Active EP3256732B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015101938.8A DE102015101938A1 (de) 2015-02-11 2015-02-11 Ventilatorrad und Ventilator
PCT/EP2015/081392 WO2016128099A1 (fr) 2015-02-11 2015-12-30 Roue de ventilateur et ventilateur

Publications (2)

Publication Number Publication Date
EP3256732A1 EP3256732A1 (fr) 2017-12-20
EP3256732B1 true EP3256732B1 (fr) 2019-10-02

Family

ID=54523876

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15830788.4A Active EP3256732B1 (fr) 2015-02-11 2015-12-30 Roue pour un ventilateur et ventilateur

Country Status (6)

Country Link
US (1) US10590949B2 (fr)
EP (1) EP3256732B1 (fr)
CN (1) CN204783820U (fr)
DE (1) DE102015101938A1 (fr)
DK (1) DK3256732T3 (fr)
WO (1) WO2016128099A1 (fr)

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DE102021204491A1 (de) * 2021-05-04 2022-11-10 Ziehl-Abegg Se Ventilator, insbesondere Radial- oder Diagonalventilator

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Also Published As

Publication number Publication date
DE102015101938A1 (de) 2016-08-11
CN204783820U (zh) 2015-11-18
DK3256732T3 (da) 2019-12-16
EP3256732A1 (fr) 2017-12-20
WO2016128099A1 (fr) 2016-08-18
US20180030994A1 (en) 2018-02-01
US10590949B2 (en) 2020-03-17

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