EP2771581B1 - Roue de ventilateur axial - Google Patents

Roue de ventilateur axial Download PDF

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Publication number
EP2771581B1
EP2771581B1 EP11773290.9A EP11773290A EP2771581B1 EP 2771581 B1 EP2771581 B1 EP 2771581B1 EP 11773290 A EP11773290 A EP 11773290A EP 2771581 B1 EP2771581 B1 EP 2771581B1
Authority
EP
European Patent Office
Prior art keywords
hub
ventilator
axial
wheel
blade
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
EP11773290.9A
Other languages
German (de)
English (en)
Other versions
EP2771581A1 (fr
Inventor
Oliver Haaf
Erhard Gruber
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 EP2771581A1 publication Critical patent/EP2771581A1/fr
Application granted granted Critical
Publication of EP2771581B1 publication Critical patent/EP2771581B1/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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329—Details of the hub
    • 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
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

Definitions

  • the present invention relates to an axial fan wheel having a wheel body consisting of a tubular, hollow cylindrical hub and a plurality of circumferentially spaced fan blades connected to the outer peripheral surface of the hub, each fan blade being in the region of one with the hub connected blade root extends axially and circumferentially obliquely between an inflow side and an outflow side of the hub.
  • Such an axial fan impeller is in the document EP 1 609 996 A1 / B1 described.
  • This impeller can be pressed with its hub for attachment to a rotating part, in particular to a rotor of an electric motor.
  • a substantially cylindrical or annular Ronde is arranged within the hub.
  • the present invention is therefore based on the object to improve a Axialventilatorrad of the described generic type with respect to its main flow and its air performance.
  • the hub is shortened on its inflow side in the circumferential direction in each case between the blade roots of the adjacent fan blades via peripheral recesses with respect to their axial hub length.
  • Concentrically curved hub rim sections with continuous, edge-free transitions to the circumferentially adjacent edge sections are preferably formed by the recesses of the hub between the blade roots.
  • the recesses formed on the inflow side edge of the hub according to the invention are suitably designed so that during operation, upon rotation of the Axialventilatorrades by eliminating or minimizing disturbing edge portions of the conveyed air carrying a fan and rotating driving electric motor and the hub itself with minimal interference Vortex and the like can flow around in the area between the fan blades.
  • the recesses according to the invention it is possible to achieve a fan wheel throughflow optimized in particular with regard to the air flow.
  • An inventive Axialventilatorrad 1 consists of a wheel body 2, which in turn consists of a tubular, hollow cylindrical hub 4 and a plurality of circumferentially arranged, connected to the outer peripheral surface of the hub 4 and starting from the hub 4 radially or obliquely inclined outwardly extending fan blades. 6 consists.
  • the term "obliquely inclined” also includes a blade curvature as exemplified in the drawings.
  • the Blades 6 are inclined or curved in particular in the direction of rotation, but may also be inclined backwards or curved. In the illustrated embodiment, the fan wheel 1 on seven fan blades 6.
  • the fan blades 6 may be uniformly spaced at equal angular intervals or for purposes of "natural balance" - unevenly spaced at unequal angular intervals.
  • Each fan blade 6 extends axially and circumferentially obliquely in the region of a blade root 8 connected to the hub 4, in particular with a specific curvature, between an inflow side 10 and an outflow side 12 of the hub 4 or the fan wheel 1.
  • the term "oblique” therefore closes here also a certain curvature, see, for. B. Fig. 3 ,
  • inclination or curvature of the fan blades 6 is in rotation in Fig. 2 and 5 each illustrated by arrows 14 air flow as the main flow from the inflow side 10 to the outflow 12 causes.
  • the inflow side 10 is also referred to as the suction side and the outflow side 12 as the pressure side.
  • edge edge portions 18 are formed between the respective adjacent blade roots, which preferably extend concavely curved.
  • the concavely curved hub rim sections 18 merge with continuous, edge-and-corner-free transitions into the edge sections of the hub 4 bordering each in the circumferential direction.
  • an improvement in the flow characteristics is achieved by the recesses 16 formed on the inflow-side edge of the hub to the effect that during operation of the Axialventilatorrades 1, by Eliminating or at least minimizing disturbing hub edge regions located in the flow region of the main flow, the conveyed air can flow around the hub 4 in the region between the fan blades 6 with minimal interference from eddies and the like.
  • an optimized ventilator wheel flow can consequently be achieved. This has a positive influence on the air performance.
  • the Axialventilatorrad 1 is mounted on a rotating part.
  • an annular disc 20 is fixed, with the wheel body 2 on the rotating part, according to 4 to 6
  • an external rotor rotor 22 of an electric motor 24 is frictionally aufpressbar.
  • the hub 4 is spaced coaxially with the rotor 22 in the radial direction over the Ronde 20.
  • the circular blank 20 is seated in the circumferential annular gap formed thereby between the rotor 22 and the hub 4.
  • the circular blank 20 is arranged in its ring cross section distributed over the circumference, in particular in the axial or axially parallel direction for a flow of cooling air.
  • the openings 26 form cooling channels which connect two annular gap regions formed axially on both sides of the round plate 20 and radially between the hub 4 and the rotor 22 in such a way that the rotor 22 rotates from the pressure side, that is the outflow side 12 Suction side, which is the inflow side 10, flows around the cooling air and thereby the motor 24 is cooled effectively.
  • the openings 26 also allow drainage of condensables that may form in certain applications and under certain operating conditions.
  • the wheel body 2 is formed with the hub 4 and the fan blades 6 in particular made of plastic as a one-piece molding.
  • the blank 20 is at least partially made of metal, for example of a metal-coated with plastic sheet metal.
  • the circular blank 20 on its inner circumference in the circumferential direction alternately arranged first and second surface portions, wherein the first surface portions define a first, larger inner diameter and the second surface portions define a second, smaller inner diameter.
  • the smaller inner diameter of the second surface portions is designed such that in this area when pressing the frictional mounting on the rotor 22 is effected. Accordingly, it is a segmented Ronde, wherein the inner peripheral surface is divided into said sections with different inner diameters.
  • the smaller diameter portions are widened during the pressing operation, while the larger diameter portions do not or only insignificantly change their radial position during the pressing operation, but advantageously bring about a reduction in the mean level of the mechanical tension values.
  • the blank 20 can be molded directly into the material during the injection process of the wheel body 2 cohesively and optionally additionally encapsulated in plastic.

Landscapes

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

Claims (4)

  1. Roue de ventilateur hélicoïde (1) avec un corps de roue (2) qui se compose d'un moyeu cylindrique creux (4) et de plusieurs pales de ventilateur (6) disposées de manière répartie à la périphérie, connectées au moyeu (4), dans laquelle chaque pale de ventilateur (6) s'étend dans la région d'un pied de pale (8) connecté au moyeu (4), de manière inclinée axialement et dans le sens périphérique entre un côté d'afflux (10) et un côté d'éjection (12) du moyeu (4), dans laquelle un flanc circulaire annulaire (20) avec lequel le corps de roue (2) peut être engagé par pression sur une partie rotative, notamment un rotor à induit extérieur (22) d'un moteur électrique (24) est fixé à l'intérieur du moyeu (4), et dans laquelle le flanc circulaire (20) présente dans sa section transversale annulaire des ouvertures (26) disposées de manière répartie à la périphérie, continues axialement, notamment pour une traversée avec de l'air de refroidissement,
    caractérisée en ce que le moyeu (4) est raccourci par rapport à sa longueur de moyeu axiale sur son côté d'afflux (10) dans le sens périphérique à chaque fois entre les pieds de pale (8) des pales de ventilateur voisines (6) par le biais d'évidements de bord (16).
  2. Roue de ventilateur hélicoïde selon la revendication 1,
    caractérisée en ce
    que des sections de bord de moyeu courbées de manière concave (18) sont formées par les évidements (16) du moyeu (4) entre les pieds de pale (8).
  3. Roue de ventilateur hélicoïde selon une des revendications 1 à 2,
    caractérisée en ce
    que le corps de roue (2) est réalisé en tant que pièce moulée d'une pièce avec le moyeu (4) et les pales de ventilateur (6), notamment en plastique.
  4. Roue de ventilateur hélicoïde selon une des revendications,
    caractérisée en ce
    que le flanc circulaire (20) se compose au moins proportionnellement de métal.
EP11773290.9A 2011-10-25 2011-10-25 Roue de ventilateur axial Active EP2771581B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/068630 WO2013060358A1 (fr) 2011-10-25 2011-10-25 Roue de ventilateur axial

Publications (2)

Publication Number Publication Date
EP2771581A1 EP2771581A1 (fr) 2014-09-03
EP2771581B1 true EP2771581B1 (fr) 2018-12-26

Family

ID=45688098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11773290.9A Active EP2771581B1 (fr) 2011-10-25 2011-10-25 Roue de ventilateur axial

Country Status (2)

Country Link
EP (1) EP2771581B1 (fr)
WO (1) WO2013060358A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018017167A (ja) * 2016-07-27 2018-02-01 日本電産株式会社 インペラおよびモータ
US11859634B2 (en) 2019-12-10 2024-01-02 Regal Beloit America, Inc. Fan hub configuration for an electric motor assembly
USD938009S1 (en) 2019-12-10 2021-12-07 Regal Beloit America, Inc. Fan hub
US11555508B2 (en) 2019-12-10 2023-01-17 Regal Beloit America, Inc. Fan shroud for an electric motor assembly
USD938010S1 (en) 2019-12-10 2021-12-07 Regal Beloit America, Inc. Fan hub
USD952830S1 (en) 2019-12-10 2022-05-24 Regal Beloit America, Inc. Fan shroud
US11371517B2 (en) 2019-12-10 2022-06-28 Regal Beloit America, Inc. Hub inlet surface for an electric motor assembly
USD938011S1 (en) 2019-12-10 2021-12-07 Regal Beloit America, Inc. Fan blade

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2269274T3 (es) * 2001-01-02 2007-04-01 BEHR GMBH & CO. KG Ventilador con palas axiales.
ITBO20010485A1 (it) * 2001-07-27 2003-01-27 Spal Srl Unita' di ventilazione
US20030138324A1 (en) * 2002-01-24 2003-07-24 Hsieh Hsin-Mao Cooling fan
DE202004005548U1 (de) * 2003-04-19 2004-06-17 Ebm-Papst St. Georgen Gmbh & Co. Kg Lüfter
DE202004010088U1 (de) 2004-06-25 2004-09-09 Ebm-Papst Mulfingen Gmbh & Co. Kg Laufrad, insbesondere für einen Axialventilator
TWI370876B (en) * 2006-01-23 2012-08-21 Delta Electronics Inc Fan and impeller thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2013060358A1 (fr) 2013-05-02
EP2771581A1 (fr) 2014-09-03

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