EP1892421B1 - Ventilateur axial doté d'un actionnement électrique - Google Patents

Ventilateur axial doté d'un actionnement électrique Download PDF

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Publication number
EP1892421B1
EP1892421B1 EP07013962A EP07013962A EP1892421B1 EP 1892421 B1 EP1892421 B1 EP 1892421B1 EP 07013962 A EP07013962 A EP 07013962A EP 07013962 A EP07013962 A EP 07013962A EP 1892421 B1 EP1892421 B1 EP 1892421B1
Authority
EP
European Patent Office
Prior art keywords
hub
fan
axial blower
axial
front region
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.)
Expired - Fee Related
Application number
EP07013962A
Other languages
German (de)
English (en)
Other versions
EP1892421A3 (fr
EP1892421A2 (fr
Inventor
Ulrich Vollert
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.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr 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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1892421A2 publication Critical patent/EP1892421A2/fr
Publication of EP1892421A3 publication Critical patent/EP1892421A3/fr
Application granted granted Critical
Publication of EP1892421B1 publication Critical patent/EP1892421B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • 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
    • 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
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations

Definitions

  • the invention relates to an axial fan with electric drive according to the preamble of claim 1, known by the WO 03/040570 A1 ,
  • the one by the WO 03/040570 A1 has become known axial fan is used in particular as a cooling fan for engine cooling in motor vehicles.
  • the cooling fan consisting of the axial fan and a driving electric motor, is arranged within a fan frame, which is located in the air flow direction behind a coolant radiator or a multi-heat exchanger existing cooling module. Due to the electromotive drive occur in the drive shaft of the motor torsional vibrations, so-called pendulum moments, which are transmitted to the fan and emitted as sound. Such a fan noise is perceived as unpleasant and is therefore undesirable.
  • the known fan has an approximately cup-shaped hub, which consists of a substantially flat end face and a substantially cylindrical peripheral surface, are attached to which axial blades.
  • the fan is rotatably connected via the end face of the hub with the drive shaft of the motor, wherein the compound is formed bendable soft in the hub area. This should allow a tilting movement between the axis of inertia of the fan and the axis of rotation. Due to the flexurally soft connection of the axial fan to the rotor of the electric drive, the axial fan should align with increasing speed in the direction of the axis of rotation. This is intended to reduce an unbalance moment.
  • the known Axiallspecter torsionally rigidly connected to the motor shaft so that emanating from the engine excitation frequencies are transmitted to the fan, resulting in the unwanted sound radiation.
  • GB 2 265 420 A By the GB 2 265 420 A was an electric blower, consisting of an axial fan and an electric motor, known, wherein the fan is connected via a vibration-damping hub with the motor shaft.
  • the hub is preferably made of an elastomeric, torsional vibration absorbing plastic material which prevents the transmission of torsional vibrations to the fan.
  • a disadvantage of the known fan arrangement is that the hub area is traversed by air - this affects the efficiency and performance of the fan.
  • an axial fan was known with electric drive, wherein between the drive shaft of the motor and fan hub a multi-arm driving element is arranged.
  • the fan hub is attached to the outer ends of the radially arranged radially arranged arms by screw connections.
  • the entrainment element is intended to reduce the moment of inertia of the fan and to prevent tumbling movements of the fan wheel. Torsional vibrations are not damped, but transmitted via the driving element on the fan.
  • the decoupling of torsional vibrations, which emanate from the electric motor with respect to a fan is also known in heating and / or air conditioning systems for motor vehicles
  • Such fan wheels are designed as radial fan wheels, which suck in the air axially and on the periphery arranged radial vanes (blade ring) in the radial outward direction in a blower spiral promote.
  • the radial impeller has a hub, which is connected on the one hand with the motor shaft of an electric motor and on the other hand via spokes, struts or a perforated support disc with the blade ring.
  • the WO 20041097226 A1 discloses a fan having an inner and an outer hub portion with a vibration damping member therebetween.
  • the JP 2002 242882 discloses a fan with hub and bearings.
  • connection between the axial fan and the electric motor is formed torsionally soft, d. H.
  • the torque transmitting area between the motor shaft and Axialbeschaufelung is formed in the circumferential direction elastic or yielding.
  • the essentially planar and closed end face can be formed so as to be torsionally soft, specifically by means of a reduced wall thickness.
  • the reduced wall thickness may be formed annular or sector-like, wherein for stiffening the hub, in particular for achieving a sufficient bending stiffness radially extending ribs are provided on the hub, which can also be molded. These ribs on the inside of the hub simultaneously fulfill a cooling function for the electric drive motor.
  • the hub region can also be designed as an open spoked wheel, wherein the spaces between the individual spokes are sealed airtight by a film, in particular an adhesive film.
  • a film in particular an adhesive film.
  • the fan hub can be mounted directly on the motor shaft, z. B. pressed or via an injection-connected with the fan hub metal bush, which is pushed onto the motor shaft.
  • the fan hub relative to the motor shaft via a driving element, which has radially projecting arms for screwing with the Lüfternabe be secured.
  • a driving element which has radially projecting arms for screwing with the Lüfternabe be secured.
  • the screw vibration-absorbing damping elements in particular bushes are arranged made of an elastomeric material, so that a decoupling in the tangential direction is achieved.
  • the radially extending arms in turn yielding in the circumferential direction, d. H. are elastically formed. Also, the decoupling between the motor shaft and fan can be achieved in the circumferential direction.
  • Fig. 1 shows a view of an axial fan 1, as seen in the air flow direction, and a fan frame 2 with a Zargenring 2a, in which the axial fan 1 rotates.
  • the fan frame 2 is rectangular in shape and adapted to a heat exchanger, not shown, in particular a coolant radiator and attached thereto, preferably via laterally arranged fastening elements 2b.
  • the coolant radiator, not shown may also be part of a cooling module, consisting of further heat exchangers such as intercooler, refrigerant condenser and oil cooler, which are arranged in the front engine compartment of a motor vehicle.
  • the axial fan 1 is driven by a not visible here electric motor, which is connected via fastening elements, in particular struts 3 with the fan frame 2.
  • the axial fan 1 thus sucks through the coolant radiator or the cooling module, not shown, ambient air and thus cools the coolant of a coolant circuit, the charge air for an internal combustion engine and / or the refrigerant of a refrigerant circuit of an air conditioner.
  • the axial fan 1 is, as will be explained in more detail below, decoupled in the direction of rotation relative to the driving electric motor, whereby a noise emission by the fan 1 is avoided.
  • Fig. 2 shows the fan 1 off Fig. 1 as a single item.
  • the fan is designed as an axial fan 1, as a so-called sickle fan, and has crescent-shaped, ie in the direction of rotation curved fan blades 4 (hereinafter also called axial blades), a hub 5 and a shell 6.
  • the fan blades may also be formed straight (in the radial direction) or with opposite curvature.
  • the axial fan 1 with hub 5, axial blades 4 and sheath 6 is preferably formed integrally as a plastic injection molded part.
  • the hub 5 is approximately cup-shaped and has a substantially planar end face 5 a, in which sector-shaped openings 7, evenly distributed over the circumference, are arranged.
  • the hub portion 5a is formed rotatable or torsionally soft, ie, the end portion is resilient in the direction of rotation.
  • the recesses 7, what in Fig. 2 Not is represented covered by a film, in particular an adhesive film - the film transmits no torque.
  • Fig. 3 shows a partial section along the line III-III in Fig. 2 through the hub 5.
  • the fan hub 5 is - as clearly visible in the sectional view - pot-shaped, ie at the substantially planar formed end portion 5a is followed by a slight rounding a substantially cylindrically shaped peripheral surface 5b, to which the fan blades 4 are sprayed.
  • the fan hub 5 is pressed onto an only partially shown motor shaft 9 of an electric motor, not shown.
  • the hub 5 is flowed in the direction of an arrow L from the air, and the drive motor, not shown, is located in the downstream region of the fan hub 5 - as well as from the above cited , generic document is known.
  • the recesses 7 are covered airtight by an adhesive film 10, so that they can not be traversed by air This prevents a backflow (recirculation) of the air in the hub area.
  • the stiffening ribs 11 fulfill a cooling function by conveying cooling air in the direction of the electric motor, not shown.
  • the illustrated hub 5 is thus closed in its stimulus area 5a and forms a smooth aerodynamic surface.
  • the hub 5 is rotationally soft due to the recesses 7, so that the fan blades 4 are decoupled and can not be excited to noise-causing vibrations in the tangential direction. Nevertheless, due to the ribbing by the ribs 11, a sufficient bending stiffness of the hub 5 is ensured.
  • Fig. 4 shows as a further embodiment of the invention, an axial fan 12, in which only the hub 13 deviating from the embodiment according to FIGS. 2 and 3 is formed: it has an annular region 14 with reduced wall thickness.
  • Fig. 5 shows a section through the hub 13 corresponding to the sectional plane VV in Fig. 4 , It can be seen from the sectional view of the cup-shaped design of the hub 13 with a substantially planar end portion 13a and a substantially cylindrical peripheral portion 13b, however, can also - for fluidic reasons - slightly tapered.
  • the end region 13a has the annular surface 14, in which the wall thickness of the hub 13, in particular the wall thickness of the stimulus region 13a, is reduced to the thickness of a membrane or skin.
  • the reduced wall thickness in the annular region 14 results for the hub 13 a compliance in the circumferential direction with the consequence of a decoupling of exciter frequencies, which emanate from the motor shaft.
  • the fan hub 13 remains closed in the end region 13a, so that no air can pass through.
  • ribs 15 are arranged, which extend in the radial and axial directions and thus ensure a sufficient flexural rigidity of the hub 13.
  • Fig. 5a shows the fan hub 13 accordingly Fig. 5 in a further enlarged view, rotatably connected to a motor shaft 16 which drives the hub 13.
  • a metal disc 17 is arranged, which on the one hand connected by injection molding with the hub portion 13 a and on the other hand rotatably mounted on the motor shaft 16.
  • the hub 13 has, in particular in the end region 13a, a wall thickness s, which is significantly reduced in the annular region 14, so that a rotationally soft connection between the motor shaft 16 and the peripheral region 13b results with the fan blades. Measurements made by the Applicant have shown that this rotationally soft connection results in a significant reduction in fan noise compared with the prior art.
  • Fig. 6 shows a further embodiment of the invention, in which the axial fan, not shown here, is attached via a driving element 18 to the motor shaft 19 of an electric motor 20.
  • the front view of the motor 20 shows three arranged on the circumference of the motor 20 mounting tabs 21, via which the motor 20 and with it the fan, not shown, is attached to a fan frame, not shown here.
  • the entrainment member 18 has three star-shaped arms 18a, 18b, 18c, at the outer ends are not shown holes for receiving bolts.
  • the fan is connected via decoupling elements, designed as elastic bushes 22 and recognizable in the left-hand sectional view, by means of the bolts with the driving element 18.
  • decoupling elements designed as elastic bushes 22 and recognizable in the left-hand sectional view, by means of the bolts with the driving element 18.
  • Fig. 7 shows a further embodiment of the invention, similar to the embodiment according to Fig. 6 , wherein like reference numerals are used for the same parts.
  • a driving element 23 is rotatably disposed, which has three extending in the radial direction, circumferentially elastic arms 23a, 23b, 23c, at the ends of which are bores for receiving bolts.
  • the fan, not shown, is connected by means of bolts, not shown, that is connected by a screw with the driving element 23.
  • the decoupling takes place here by the resilience of the radial arms 23a, 23b, 23c in the circumferential direction - therefore, the elastic decoupling elements in the form of rubber bushings 22 according to Fig. 6 omitted in this embodiment.

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

Claims (7)

  1. Ventilateur axial (1, 12) comprenant un moyeu (5, 13) permettant de raccorder le ventilateur axial à un moteur d'entraînement électrique (20), où le moyeu (5, 13) est configuré sensiblement en forme de pot et présente une zone frontale (5a, 13a) ainsi qu'une zone circonférentielle (5b, 13b) sensiblement cylindrique, caractérisé en ce que la zone frontale (13a) présente une zone (14) à peu près en forme d'anneau de cercle, à épaisseur de paroi réduite, et l'épaisseur de paroi réduite est configurée comme une membrane (14).
  2. Ventilateur axial selon la revendication 1, caractérisé en ce que des évidements (7) sont disposés dans la zone frontale (5a), évidements qui sont recouverts par une feuille (10), de préférence une feuille adhésive.
  3. Ventilateur axial selon l'une des revendications 1 ou 2, caractérisé en ce que la zone frontale (5a, 13a) présente, sur côté tourné vers le moteur d'entraînement, des renforts ou des nervures (11, 15) s'étendant sensiblement dans le sens radial.
  4. Ventilateur axial selon l'une quelconque des revendications précédentes, caractérisé en ce que le ventilateur axial (1, 12) est configuré en formant une seule et même pièce avec le moyeu (5, 13), de préférence comme une pièce en matière plastique moulée par injection.
  5. Ventilateur axial selon l'une quelconque des revendications précédentes, caractérisé en ce que le moteur d'entraînement électrique (20) présente un arbre de moteur (19) sur lequel est fixé un élément d'entraînement (18, 23) présentant plusieurs bras radiaux (18a, 18b, 18c ; 23a ; 23b ; 23c), élément d'entraînement qui est relié à la face frontale du moyeu, par les bras radiaux à rotation douce.
  6. Ventilateur axial selon la revendication 5, caractérisé en ce que des éléments de découplage, en particulier des douilles (22) élastiques et / ou amortissant le bruit, réalisés dans un matériau élastomère, sont disposés entre les bras radiaux (18a, 18b, 18c) et la zone frontale.
  7. Ventilateur axial selon la revendication 5 ou 6, caractérisé en ce que les bras radiaux (23a ; 23b ; 23c) sont disposés en étant élastiques et souples dans la direction circonférentielle.
EP07013962A 2006-08-18 2007-07-17 Ventilateur axial doté d'un actionnement électrique Expired - Fee Related EP1892421B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006038655A DE102006038655A1 (de) 2006-08-18 2006-08-18 Axiallüfter mit elektrischem Antrieb

Publications (3)

Publication Number Publication Date
EP1892421A2 EP1892421A2 (fr) 2008-02-27
EP1892421A3 EP1892421A3 (fr) 2008-03-26
EP1892421B1 true EP1892421B1 (fr) 2011-05-18

Family

ID=38616645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07013962A Expired - Fee Related EP1892421B1 (fr) 2006-08-18 2007-07-17 Ventilateur axial doté d'un actionnement électrique

Country Status (2)

Country Link
EP (1) EP1892421B1 (fr)
DE (1) DE102006038655A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009050369A1 (de) 2009-10-22 2011-04-28 Magna Electronics Europe Gmbh & Co.Kg Axiallüfter
DE102010028099A1 (de) * 2010-04-22 2011-10-27 Behr Gmbh & Co. Kg Axiallüfter
DE102010063147A1 (de) * 2010-12-15 2012-06-21 Robert Bosch Gmbh Gebläsemodul
ITUB20152894A1 (it) * 2015-08-05 2017-02-05 Spal Automotive Srl Ventilatore assiale
DE102016012801A1 (de) 2016-10-26 2018-04-26 Man Truck & Bus Ag Axiallüfterrad
CN108087332B (zh) * 2018-01-22 2024-06-11 杭州老板电器股份有限公司 风机叶轮总成及吸油烟机

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4639193A (en) * 1984-11-09 1987-01-27 Siemens Aktiengesellschaft Fan wheel for radial fan
EP0181549A1 (fr) * 1984-11-09 1986-05-21 Siemens Aktiengesellschaft Roue pour ventilateur
DE4102161A1 (de) * 1991-01-25 1992-07-30 Bosch Gmbh Robert Luefterrad mit einer topffoermigen nabe
DE4204531A1 (de) * 1992-02-15 1993-08-19 Pvs Kunststofftechnik Gmbh & C Luefterradvorrichtung
DE19635179A1 (de) * 1996-08-30 1998-03-05 Bosch Gmbh Robert Lüfter
FR2756021B1 (fr) * 1996-11-19 2001-11-23 Valeo Systemes Dessuyage Motoventilateur a montage d'helice simplifie
DE19651735A1 (de) * 1996-12-12 1998-06-18 Behr Gmbh & Co Halterung für einen Motor, insbesondere einen Gebläserad-Elektromotor
FR2757907B1 (fr) * 1996-12-26 1999-03-19 Valeo Climatisation Roue de turbine centrifuge, notamment pour un systeme de chauffage/ventilation et/ou de climatisation de vehicule automobile
DE19905075C2 (de) * 1999-02-08 2003-05-15 Valeo Klimasysteme Gmbh Lüfterrad, insbesondere zum Einsatz für Heiz- oder Klimaanlagen von Fahrzeugen
DE19907910C2 (de) * 1999-02-24 2003-08-07 Valeo Klimasysteme Gmbh Lüfterrad
JP2002242882A (ja) * 2001-02-19 2002-08-28 Japan Servo Co Ltd 軸流ファン
DE10153412A1 (de) * 2001-10-30 2003-05-15 Bosch Gmbh Robert Lüfterbefestigung mit dynamischem Unwuchtausgleich
US7585159B2 (en) * 2003-04-28 2009-09-08 Robert Bosch Gmbh Automotive engine-cooling fan assembly
ATE468491T1 (de) * 2003-07-15 2010-06-15 Ebm Papst St Georgen Gmbh & Co Lüfteranordnung, und verfahren zur herstellung einer solchen

Also Published As

Publication number Publication date
EP1892421A3 (fr) 2008-03-26
EP1892421A2 (fr) 2008-02-27
DE102006038655A1 (de) 2008-02-21

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