EP3368774A1 - Roue de ventilateur et ventilateur - Google Patents

Roue de ventilateur et ventilateur

Info

Publication number
EP3368774A1
EP3368774A1 EP16781434.2A EP16781434A EP3368774A1 EP 3368774 A1 EP3368774 A1 EP 3368774A1 EP 16781434 A EP16781434 A EP 16781434A EP 3368774 A1 EP3368774 A1 EP 3368774A1
Authority
EP
European Patent Office
Prior art keywords
fan wheel
air guide
radial
fan
guide element
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
EP16781434.2A
Other languages
German (de)
English (en)
Other versions
EP3368774B1 (fr
Inventor
Jens Müller
Daniel Gebert
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 EP3368774A1 publication Critical patent/EP3368774A1/fr
Application granted granted Critical
Publication of EP3368774B1 publication Critical patent/EP3368774B1/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
    • F04D29/26—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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/162—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of a centrifugal flow wheel
    • 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
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis

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 mounted.
  • Generic centrifugal fan wheels are known from the prior art, for example from DE 10 2010 009 566 A1 or DE 20 2009 018 770 IM.
  • centrifugal fan wheels are preferably used in volume-flow-conducting elements (eg air handling units) in the field of ventilation and air conditioning technology.
  • volume-flow-conducting elements eg air handling units
  • the air flow is applied to the channel wall extending in the extension of the radial direction of the fan wheel.
  • the invention is therefore based on the object to provide a fan and a fan fan, which ensure improved overall efficiency.
  • Radial Ventilatorrad or Diagonalventilatorrad is executed, with a plurality of distributed around an axial axis of rotation fan blades, a radially arcuate cover disc which rests with its underside at least partially on the axial end faces of the fan blades and has an inlet opening around the axis of rotation.
  • the at least partially curved in the radial section cover plate has a radial inner portion in which a tangent angle to a radial plane of the fan wheel is greater than 45 °, and in the radial direction of the inner portion adjoining the outer portion, wherein in the radial inner portion on the underside opposite the upper side the cover disc is arranged at least one of the upper side of the cover plate radially and axially projecting air guide with a circumferentially facing guide surface.
  • the invention already works with an air guide.
  • air guide elements Preferably, however, three or five air guide elements distributed in the circumferential direction are provided on the cover plate. As far as is referred to below by air guide elements, this always includes the use of only one air guide element.
  • the upper side of the cover plate which is at least partially curved in cross-section, lays the radial air flow generated by the fan wheel earlier against the radially following channel wall, as a result of which increased pressure recovery can be achieved.
  • the dynamic losses are reduced and the overall efficiency increased.
  • the air guide elements have an axial end face and a ratio of a radial extent of the axial end face against a cover plate diameter in a range of 0.005 and 0.15, preferably in a range of 0.01 and 0.05.
  • the radial size of the air guide elements influences the flow generated by the fan wheel, with the overall efficiency being greatest in said area.
  • the air guide elements are flush with the inlet-side axial edge of the cover plate or have a small axial distance which is less than or equal to 4% of the cover plate diameter.
  • the axial end faces of the air guide elements extend in a likewise favorable effect execution over its entire radial length parallel to the axial plane of the fan wheel, the radial end sides over their entire axial length parallel to the axis of rotation or to a radial plane of the fan wheel.
  • the fan wheel is formed in one embodiment so that the angle of attack ⁇ of the air guide with respect to a radial plane of the air guide elements through the axis of rotation of the fan wheel in a range of ⁇ 30 °.
  • An angle of attack of 0 ° is preferred, so that the air guiding elements extend in a straight line radially outward.
  • the angle of inclination ⁇ of the air guiding elements with respect to the rotatio onsachse of the fan advantageously in a range of ⁇ 60 °.
  • An inclination angle of 0 ° is preferred so that the air guiding elements extend parallel to the axis of rotation.
  • the positive effect of the spoiler elements is greatest at the correspondingly preferred values.
  • the air guiding elements are convex or concave shaped, i. they extend in an arc-shaped section.
  • the orientation of the air guide elements can be done depending on the direction of rotation.
  • the air guide elements are formed integrally with the cover disk.
  • the air guide elements are punched for this, sprayed in one embodiment of plastic. This reduces the number of parts and the assembly costs.
  • the air guide elements are detachably fastened to the cover plate, for example by screwing or
  • corresponding receptacles can be provided on the cover disk into which the air-guiding elements are inserted. This allows the retrofitting or replacement of air guide elements.
  • the air guide elements can also be firmly connected to the cover plate, for example by welding, gluing or riveting.
  • the position or distribution of the air guide elements in the circumferential direction is variable.
  • the air guide elements are arranged in the circumferential direction at a position of the cover disk, in which the fan blades protrude in an axial plan view in the radial direction in the inlet opening or radially projecting beyond the inlet opening.
  • air guide elements and fan blades interact fluidically.
  • the axial and radial end edges of the air guide elements are bevelled or rounded.
  • the transition of the axial and radial end edges of the air guide elements is provided with a rounding.
  • the fan wheel according to the invention also has a bottom disk on which the fan blades are arranged. Between bottom disk and cover disk is formed on the fan blades of the radial exhaust duct. Preferred for this purpose is an embodiment as a one-piece fan wheel.
  • the invention further comprises a fan with a fan wheel described above.
  • Fig. 1 is a perspective view of a fan wheel
  • Fig. 2 is a side view of the fan wheel of Fig. 1;
  • Fig. 3 is an enlarged detail view of the fan wheel of Fig. 2;
  • Fig. 4 is a plan view of the fan wheel of Fig. 1;
  • Fig. 5 is a plan view of a fan wheel according to an alternative
  • FIG. 6 is a side view of a fan wheel according to another alternative embodiment
  • Fig. 7a, b each a representation of the flow with and without air guide elements
  • Fig. 8 is a characteristic comparison of a fan wheel with and without
  • FIG. 1 shows a perspective view of a radial fan wheel 1 with a bottom disk 12, a cover disk 3 and curved fan blades 2 arranged therebetween.
  • an air inlet opening 4 is formed in the cover disk 3, the air is blown out via the radial exhaust duct 12
  • Five air guide elements 7 are arranged at equal intervals distributed in the circumferential direction on the upper side of the cover disk 3 adjacent to the inlet opening 4.
  • FIG. 2 shows a side view of the fan wheel from FIG. 1.
  • the partially arcuate shape of the cover disk 3 can be seen corresponding to a radial section.
  • the arcuate cover disk 3 is subdivided via the 45 ° tangent T with respect to a radial plane into a radial inner section 5 and a radially outer section 6 adjoining it directly in the radial direction.
  • the radial inner portion 5 of the cover plate 3 starts or ends when the tangent angle relative to the radial plane is greater than 45 °.
  • the radial outer portion 6 also includes a straight radially outwardly extending outer edge region.
  • the spoiler elements 7 are radially and axially projecting in the radially inner section 5 and each have a guide surface 8 pointing in the circumferential direction on both sides.
  • Each air guide element 7 has an axial end face 9 and a radial end face 10 which each extend parallel to a radial plane or axial plane of the fan wheel 1.
  • FIG. 3 shows an enlarged detail view of the fan wheel 1 from FIG. 2, from which the size ratios and extent of the air guiding elements 7 result.
  • all air guide elements 7 are identical in shape.
  • the radial extent H of the axial end face 9 of the air guide element 7 with respect to the cover disk diameter D provides in the embodiment shown a value of 0.05.
  • the length L of the respective air guide element 7 results from the radial extent H and its ratio to the cover disk diameter D, as far as the air guide elements 7 extend over their entire length along the upper side of the cover disk 3 as shown.
  • the air guide elements 7 are arranged at an axial distance A, which is 2 mm in the embodiment shown.
  • the transition between the axial end face 9 and the radial end face 10 has a rounding.
  • FIG. 4 shows the plan view of the fan wheel from FIGS. 1-3 and in particular the extension of the air guide elements 7 in each case in a straight line radially outward along a radial plane R1 through the axis of rotation of the fan wheel 1.
  • the air guide elements 7 are viewed in the circumferential direction, in each case in that peripheral section the cover disk 3 is arranged, in which the fan blades 2 protrude into the inlet opening 4 in the radial direction or protrude radially beyond the inlet opening 4.
  • Figure 5 shows a plan view of a fan wheel 1 according to an alternative embodiment of FIG. 4, wherein the air guide elements 7 are each arranged inclined in the circumferential direction on the cover plate 3.
  • the respective extension of the air guide elements 7 has axial and radial components, so that an angle ⁇ of the air guide elements 7 with respect to the radial plane R1 by a radially inner starting point of the air guide elements 7 and through the axis of rotation of the fan wheel 1 is 30 °.
  • the angle of attack can also be negative, ie clamped in the opposite circumferential direction. All other features are consistent with those from the Embodiment of FIG. 1 match.
  • FIG. 6 shows a side view of a fan wheel 1 of a further alternative embodiment.
  • the inclination angle ⁇ can also be negative. All other features are consistent with those of the embodiment of FIG. 1 or 5 match.
  • FIG. 7a shows a flow course of the fan wheel 1 from FIG. 1, 5 or 6 in a state mounted on a channel wall 71 extending in the radial direction
  • FIG. 7b shows the flow course of the same fan wheel but without air guide elements in the same mounting state.
  • the radially blown-out air flow settles in accordance with FIG. 7a immediately adjacent to the fan wheel 1 with air guide elements 7, whereas in conventional fan wheels according to FIG. 7b there is a clear radial distance.
  • the technical effect is shown in the characteristic comparison of the pressure and overall efficiency compared to the volume flow according to FIG. 8.
  • the values of the fan wheel 1 from FIG. 1 are each shown as a dashed line, the same fan wheel without air guide elements 7 in each case as a solid line.
  • the advantage lies in the maximum depending on the value (pressure, overall efficiency) between + 5% and + 20%.

Landscapes

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

Abstract

L'invention concerne une roue de ventilateur réalisée sous forme de roue de ventilateur radial ou de roue de ventilateur diagonal, comprenant une pluralité de pales de ventilateur réparties autour d'un axe de rotation axial, un disque de recouvrement arqué en coupe radiale, lequel repose, par son côté inférieur, au moins en partie sur des côtés d'extrémité axiaux des pales de ventilateur et comprend une ouverture d'admission autour de l'axe de rotation. Le disque de recouvrement arqué en coupe radiale comprend une partie intérieure radiale dans laquelle un angle tangent par rapport à un plan radial de la roue de ventilateur est supérieur à 45 ° et une partie extérieure se raccordant à la partie intérieure dans la direction radiale. La roue de ventilateur est caractérisée en ce qu'au moins un élément de guidage d'air faisant saillie radialement et axialement à partir du côté supérieur du disque de recouvrement et présentant une surface de guidage orientée dans la direction périphérique est disposé dans la partie intérieure sur le côté supérieur, opposé au côté inférieur, du disque de recouvrement.
EP16781434.2A 2015-10-28 2016-10-13 Roue de ventilateur et ventilateur Active EP3368774B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015118387.0A DE102015118387A1 (de) 2015-10-28 2015-10-28 Ventilatorrad und Ventilator
PCT/EP2016/074568 WO2017071963A1 (fr) 2015-10-28 2016-10-13 Roue de ventilateur et ventilateur

Publications (2)

Publication Number Publication Date
EP3368774A1 true EP3368774A1 (fr) 2018-09-05
EP3368774B1 EP3368774B1 (fr) 2023-11-29

Family

ID=56435067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16781434.2A Active EP3368774B1 (fr) 2015-10-28 2016-10-13 Roue de ventilateur et ventilateur

Country Status (4)

Country Link
EP (1) EP3368774B1 (fr)
CN (1) CN205298054U (fr)
DE (1) DE102015118387A1 (fr)
WO (1) WO2017071963A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018132092A1 (de) 2017-12-13 2019-06-13 Ebm-Papst Mulfingen Gmbh & Co. Kg Diagonalventilatorrad mit erhöhter Festigkeit
EP3724512B1 (fr) 2017-12-13 2024-10-23 ebm-papst Mulfingen GmbH & Co. KG Boîtier fabriqué en une seule opération
DE102021204491A1 (de) * 2021-05-04 2022-11-10 Ziehl-Abegg Se Ventilator, insbesondere Radial- oder Diagonalventilator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2622018A1 (de) * 1976-05-18 1977-12-08 Kramer Carl Radialventilator
JPH05240190A (ja) * 1992-03-03 1993-09-17 Hitachi Ltd 遠心ファン
JPH05332293A (ja) * 1992-06-03 1993-12-14 Nippondenso Co Ltd 多翼送風機
JP4859204B2 (ja) * 2006-01-27 2012-01-25 日立アプライアンス株式会社 遠心ファンとそれを備えた空気調和装置
DE202009018770U1 (de) 2009-02-12 2013-03-07 Ebm-Papst Mulfingen Gmbh & Co. Kg Radial- oder Diagonal-Ventilatorrad
DE202010018509U1 (de) 2010-02-26 2017-03-15 Ebm-Papst Mulfingen Gmbh & Co. Kg Radial- oder Diagonal-Ventilatorrad
WO2015111210A1 (fr) * 2014-01-27 2015-07-30 三菱電機株式会社 Ventilateur centrifuge et dispositif de climatisation

Also Published As

Publication number Publication date
DE102015118387A1 (de) 2017-05-04
CN205298054U (zh) 2016-06-08
WO2017071963A1 (fr) 2017-05-04
EP3368774B1 (fr) 2023-11-29

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