EP3433498A1 - Aube de ventilateur et ventilateur - Google Patents

Aube de ventilateur et ventilateur

Info

Publication number
EP3433498A1
EP3433498A1 EP17777247.2A EP17777247A EP3433498A1 EP 3433498 A1 EP3433498 A1 EP 3433498A1 EP 17777247 A EP17777247 A EP 17777247A EP 3433498 A1 EP3433498 A1 EP 3433498A1
Authority
EP
European Patent Office
Prior art keywords
blade
longitudinal direction
fan
fan blade
edge
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.)
Withdrawn
Application number
EP17777247.2A
Other languages
German (de)
English (en)
Inventor
Michael Eccarius
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 EP3433498A1 publication Critical patent/EP3433498A1/fr
Withdrawn legal-status Critical Current

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
    • F04D29/30—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
    • 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 an improved with respect to their rigidity
  • the invention is therefore based on the object to provide a fan blade with increased rigidity and a corresponding fan.
  • a fan blade with a blade body which has a leading edge and a trailing edge, which, viewed in a blade longitudinal direction, lie opposite one another.
  • the blade body forms at least one shaft whose wave crest at least in sections in the blade longitudinal direction between the leading edge and the
  • Outflow edge extends.
  • the shaft is characterized by a course of the flow body perpendicular to the blade longitudinal direction with at least one positive slope, the adjoining wave crest and a subsequent to the wave crest negative slope.
  • the at least one wave has a sinusoidal cross-section.
  • the at least one shaft forms a wave crest with a wave crest, which together have a triangular cross-section.
  • a wave shaped wave crest extends transversely over a predetermined length of the blade body.
  • the slopes of the wave crest can be symmetrical or asymmetrical in a cross-sectional view, depending on where in the fan blade which stiffness is preferred.
  • the wave crest may extend over a partial width or the entire width of the fan blade, depending on the area in which the stiffening is to be realized.
  • the at least one shaft extends over the entire length of the fan blade in the blade longitudinal direction between the leading edge and the trailing edge and has a geometrically constant course over a plurality of mutually spaced apart in the blade longitudinal direction to the blade longitudinal direction cross sections. This means that the shaft has the same shape over its extension from the leading edge to the trailing edge.
  • a design is favorable in which in the transverse direction perpendicular to the blade longitudinal direction a plurality of geometrically identical waves is formed, the wave crests are parallel in the blade longitudinal direction.
  • the wave crests can be rounded sinusoidal, triangular serrated or polygonal with a wave crest plateau.
  • the stiffness of the fan blade is further increased by the blade body is formed in the blade longitudinal direction and / or in the transverse direction braced in itself.
  • the strain is formed in a variant by a local or area massive and / or cold deformation of the blade body, whereby a strength-increasing voltage gradient is induced in the material of the blade body.
  • this is achieved by a local thermal stress, in one embodiment, for example, by guided cooling processes with varying cooling rates in different areas of the fan blade.
  • the blade body is formed in the blade longitudinal direction and / or in the transverse direction by locally different wall thicknesses of the blade body in the blade longitudinal direction and / or in the transverse direction braced in itself.
  • a corresponding voltage notch is realized in embodiments as a through hole in the thickness direction of the Lüfterradschaufel or as a local recess.
  • the local recess preferably has a triangular, quadrangular or polygonal shape in a plan view of a surface (pressure side / suction side) of the blade body.
  • the at least one stress notch raises the local stress concentration to below the respective material-specific plastic yield point or provides a partially plastic material deformation so that micro material deformations locally reduce stress gradients above the yield stress and thus leave local maximum stress inductions preferably at the top Limit of elastic material properties lie.
  • the at least one stress notch is formed on at least one transverse edge and / or at least one of the leading edge and the trailing edge of the blade body.
  • the size of the respective longitudinal edge region in the blade longitudinal direction is preferably determined over a length which is 2 - 550 times the
  • Blade thickness in the thickness direction of the fan blade corresponds.
  • the respective edge region extends over a maximum length of 20% of a total length of the fan blade in blade longitudinal direction. direction.
  • the invention further comprises the fan wheel with at least one, preferably a plurality of fan blades with one of the embodiments described above.
  • the at least one fan blade resiliently biased attached to the fan, for example, welded to a deck and / or bottom plate of a radial fan or pressed.
  • Fig. 1 is a schematic view of a section of a
  • FIG. 2 is a schematic view of a detail of a
  • Fig. 3 is a schematic view of a detail of a
  • FIG. 4 is a schematic view of a detail of a

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 aube de ventilateur comprenant un corps d'aube présentant un bord d'attaque et un bord de fuite qui, considérés dans une direction longitudinale de l'aube, s'étendent de manière opposée, le corps de l'aube formant, dans une section transversale perpendiculaire à la direction longitudinale de l'aube, au moins une vague dont la crête s'étend au moins par endroits dans la direction longitudinale de l'aube entre le bord d'attaque et le bord de fuite.
EP17777247.2A 2016-10-06 2017-09-28 Aube de ventilateur et ventilateur Withdrawn EP3433498A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016118963.4A DE102016118963B4 (de) 2016-10-06 2016-10-06 Lüfterradschaufel und Lüfterrad
PCT/EP2017/074586 WO2018065283A1 (fr) 2016-10-06 2017-09-28 Aube de ventilateur et ventilateur

Publications (1)

Publication Number Publication Date
EP3433498A1 true EP3433498A1 (fr) 2019-01-30

Family

ID=59039949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17777247.2A Withdrawn EP3433498A1 (fr) 2016-10-06 2017-09-28 Aube de ventilateur et ventilateur

Country Status (4)

Country Link
EP (1) EP3433498A1 (fr)
CN (1) CN206268129U (fr)
DE (1) DE102016118963B4 (fr)
WO (1) WO2018065283A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20250347291A1 (en) * 2024-05-09 2025-11-13 John Cyrus Mohyi Noise reducing impeller vane
US12473926B1 (en) 2024-08-14 2025-11-18 Morrison Products, Inc. Impellers and manufacturing methods thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130055337A (ko) * 2011-11-18 2013-05-28 표수호 유체저항 저감형 구조를 갖는 고효율 회전 블레이드 및 에어포일

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1059161A (en) 1910-09-07 1913-04-15 Albert Huguenin Blade for the wheels of rotary fluid-compressors.
GB191314103A (en) 1913-06-18 1914-04-09 Alldays & Onions Pneumatic Eng Improvements in Centrifugal Fans.
US1352848A (en) * 1917-10-30 1920-09-14 Stanyo Desider Fan-wheel
JP2005120877A (ja) 2003-10-15 2005-05-12 Haruo Yoshida 横断流送風機用羽根車および横断流送風機
JP5457621B2 (ja) 2006-10-12 2014-04-02 株式会社日立産機システム 多翼形羽根車
PL2846046T3 (pl) 2013-09-10 2018-04-30 Punker Gmbh Wirnik wentylatora
DE102014207903A1 (de) 2014-04-28 2015-11-12 Ebm-Papst Mulfingen Gmbh & Co. Kg Schaufelkante
KR102227374B1 (ko) 2014-05-28 2021-03-11 엘지전자 주식회사 원심팬
DE102014216266A1 (de) 2014-07-23 2016-01-28 Ebm-Papst Mulfingen Gmbh & Co. Kg Schaufel für ein Laufrad

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130055337A (ko) * 2011-11-18 2013-05-28 표수호 유체저항 저감형 구조를 갖는 고효율 회전 블레이드 및 에어포일

Also Published As

Publication number Publication date
DE102016118963A1 (de) 2018-04-12
DE102016118963B4 (de) 2023-04-27
WO2018065283A1 (fr) 2018-04-12
CN206268129U (zh) 2017-06-20

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