EP3230595B1 - Anordnung eines laufrads auf einem rotierenden teil und verfahren zur herstellung der anordnung - Google Patents

Anordnung eines laufrads auf einem rotierenden teil und verfahren zur herstellung der anordnung Download PDF

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Publication number
EP3230595B1
EP3230595B1 EP15831133.2A EP15831133A EP3230595B1 EP 3230595 B1 EP3230595 B1 EP 3230595B1 EP 15831133 A EP15831133 A EP 15831133A EP 3230595 B1 EP3230595 B1 EP 3230595B1
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EP
European Patent Office
Prior art keywords
impeller
rotor
round plate
hub
arrangement according
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
EP15831133.2A
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German (de)
English (en)
French (fr)
Other versions
EP3230595A1 (de
Inventor
Stefan Roessler
Michael RUEDENAUER
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.)
Ziehl Abegg SE
Original Assignee
Ziehl Abegg SE
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Publication date
Application filed by Ziehl Abegg SE filed Critical Ziehl Abegg SE
Priority to SI201531641T priority Critical patent/SI3230595T1/sl
Publication of EP3230595A1 publication Critical patent/EP3230595A1/de
Application granted granted Critical
Publication of EP3230595B1 publication Critical patent/EP3230595B1/de
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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
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • 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
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of fans

Definitions

  • the invention relates to an arrangement of an impeller on a rotating part, preferably on an external rotor motor.
  • the rotating part can be, for example, an implemented shaft of an internal rotor motor or a hub or disk, for example in the case of a belt drive.
  • the term "rotating part" is to be understood in the broadest sense. For the sake of simplicity, the following will speak of the arrangement of an impeller on an electric motor, in particular on an external rotor motor.
  • the torque of the motor is transmitted to the impeller through a non-rotatable connection between the rotor of the motor and the impeller or its impeller hub.
  • the connection is realized via an interference fit (interference fit) between the impeller hub and the rotor, with the integration of a circular blank that is permanently assigned to the impeller hub and absorbs mechanical stresses.
  • the impeller or the impeller hub and the circular blank can be two parts that are independent of one another, whereby a connection that is to be defined in whatever way is created during the pressing on / assembly.
  • the invention also relates to a method for producing such an arrangement.
  • the impeller can be the impeller (axial impeller) of a fan, the impeller being connected to the rotor in a rotationally fixed manner (cf. DE 10 2011 015 784 A1 ).
  • the impeller can also be designed as a radial impeller and / or a diagonal impeller.
  • Impellers made of aluminum can be manufactured or cast together with a rotor made of aluminum.
  • the disadvantage here is that aluminum parts are fundamentally expensive.
  • they require a relatively high amount of plastering and are inflexible in use, especially with regard to impellers. Namely, it is not possible to implement different air conveying directions with identical components, namely due to the fixed assignment of the components. According to the desired / required air flow direction, two differently combined aluminum parts are to be kept available.
  • the impeller pressed onto the rotor is known, with the same flexibility as the screwed-on impeller, since both conveying directions can be implemented with the same components.
  • assembly is simple and therefore inexpensive.
  • a round blank made of steel is used for a secure connection between the impeller or the hub and the rotor, which is usually produced in a progressive tool and placed in the impeller tool before the injection molding process.
  • Condensation water can form between the rotor and the impeller (for example an impeller), which due to the given geometry is difficult to remove. This is particularly true when there are no passages between the rotor and the pressed-on hub of the impeller. This The problem has already been recognized in the prior art and notches have been made in the surface of the hub, which, however, weaken the mechanical properties of the hub and also cause high stresses when the hub is pressed on.
  • a rotor with a deep-drawn sheet steel housing is used, the surface of which is not machined.
  • the surface is regularly powder coated.
  • the deep drawing and the applied powder coating create a large tolerance field that needs to be bridged.
  • the circular sheet metal used in the impeller must have a smaller inner diameter than the rotor so that the connection also holds securely in the worst case. In any case, you should plan for a certain amount of security.
  • the difference in diameter to be bridged can be, for example, 0.6 to 0.8 mm.
  • FEM finite element method
  • EP 1 609 996 B1 proposed to propose a segmented metallic round blank, wherein the different segments of the round blank, each to be understood as a cylindrical part of the round blank, have different inside diameters.
  • the round blank proposed in the prior art has curved surface segments with a smaller inner diameter, evenly distributed along the circumference of the round blank, so that the round blank comes to full contact with the surface of the rotor only with those segments that have the smaller inner diameter .
  • the pamphlet DE 20 2010 011 378 U1 discloses a further round blank with a peripheral edge web acting as an insertion bevel in order to be able to more easily press the round blank onto a rotor.
  • the present invention is based on the object of designing and developing the generic arrangement of an impeller on an electric motor in such a way that the problems occurring in the prior art are at least largely eliminated.
  • a secure hold of the impeller on the rotor should be ensured, and it should be possible to press the impeller onto the rotor easily and quickly.
  • the impeller is pressed on, sufficient cool air should be able to slide past the rotor and condensation water drainage should be guaranteed.
  • it must be ensured that the impeller sits securely on the rotor under all loads that occur during operation.
  • a method for producing a corresponding arrangement is to be specified.
  • the generic arrangement is characterized in that the round blank is polygonal or polygonal with flat surfaces between the corners, whereby when the round blank is pressed onto the rotor, the surfaces extending between the corners at least form axial contact surfaces with the surface of the rotor deform slightly.
  • the round blank can consist of any material, provided that it ensures sufficient mechanical strength in or on the hub of the impeller. It is also conceivable that the round blank is produced in situ during the manufacture of the impeller or the impeller hub, for example defined by an area made of more solid material.
  • the round blank is designed as a metal round blank, it being possible in particular for it to consist of sheet metal, preferably sheet steel. This ensures that the round blank is made sufficiently stable.
  • the round blank is a polygonal or polygonal component.
  • the term “round blank” is retained, although according to the teaching claimed here it is not an ideally round component. Rather, it is a polygonal / polygonal component, for example a round blank with eight corners, which results in eight surfaces with correspondingly eight contact lines or widened axial contact surfaces between the eight corners.
  • the number of preferred or even required corners essentially depends on the diameter of the rotor and the required gap between the rotor and the round blank.
  • the octagonal design of the Round blank is mentioned as an example for a diameter in the range from 70 to 110 mm. With smaller diameters, the round blank can be equipped with three corners, with larger diameters with 16 corners.
  • the round sheet metal can be injected into the hub material on the inside of the hub, in the hub passage.
  • the round blank would have to be inserted into the injection molding tool.
  • the hub is at least partially encapsulated and firmly connected to the impeller by the encapsulation.
  • the blank it is not absolutely necessary for the blank to be overmolded as a whole. In the absence of a complete overmolding, gaps arise between the round blank and the impeller hub. These gaps lead to the fact that even after the pressing and deformation of the round blank there is no continuous contact between the round blank and the hub and thus no or only slight stresses are introduced into the hub or the impeller.
  • the round blank is advantageously overmolded only at those points where it experiences no or only very little deformation.
  • the inner diameter of the round blank or of the circle inscribed in the polygonal round blank is smaller than the outer diameter of the rotor.
  • the inner diameter of the round blank can be selected in such a way that when the round blank is pushed on, an initial axial line contact expands to form an axial surface segment or surface contact. It is essential that a sufficient passage remains in the corner areas to ensure on the one hand ventilation along the surface of the rotor and on the other hand drainage of condensation water. After the round blank has been pressed on and deformed, non-contact areas remain with respect to the surface of the rotor.
  • the round blank can have structural measures that favor the pushing or pressing of the impeller onto the rotor.
  • the round blank has a circumferential widening in the edge area, at least on one side, in order to facilitate pushing and pressing onto the rotor. If a corresponding edge area is formed on both sides of the round blank, this favors the fact that the same impeller or impeller can be used for both air conveying directions, with the convenience of easier pushing or pressing on from both sides.
  • the method according to the invention achieves the object mentioned at the beginning by the features of claim 10.
  • the method relates to the production of an arrangement according to the invention in accordance with the above statements.
  • a motor which is an electric motor, in particular an external rotor motor. This is preferably held vertically by a tool carrier, so that the impeller or impeller is mounted with the motor in a fixed position.
  • an impeller or impeller is provided for assembly, this impeller comprising a polygonal round blank corresponding to the arrangement according to the invention.
  • the round blank is integrated into the passage of the impeller so that it is used for fastening on the rotor.
  • the impeller is positioned opposite the motor in accordance with the desired direction of conveyance of the fluid, so that the same impeller can be used for both directions of conveyance. Then the impeller is pushed onto the rotor and pressed on, while deforming the polygonal or polygonal round blank with flat surfaces extending between the corners, in such a way that, opposite the surface of the rotor, axial, segment-like surface contacts with free passage areas in between for flow with Fluids - air and / or water - arise, whereby when the round blank is pressed onto the rotor, the surfaces extending between the corners are at least slightly deformed to form axial contact surfaces with the surface of the rotor.
  • Fig. 1 shows in a schematic view an arrangement according to the invention, comprising an electric motor 1 with rotor 2, an impeller, hereinafter referred to as impeller 3, being pressed onto rotor 2.
  • impeller 3 an impeller, hereinafter referred to as impeller 3
  • a non-rotatable connection between the hub 4 of the impeller 3 and the rotor 2 or its surface is produced by a press fit.
  • the wings 5 are equipped with aerodynamic features that play no role in relation to the teaching according to the invention.
  • the impeller 3 is pressed onto the rotor 2 in order to generate a specific flow direction. To reverse the direction of flow, it is possible to press the impeller 3 onto the rotor 2 the other way around without changing the type and equipment of the impeller 3.
  • Fig. 2 shows the item Fig. 1 in a plan view, where there, between the hub 4 of the impeller 3 and the rotor 2, the angular round blank 6 can be seen in a schematic view, the surfaces of which have a contact with the surface of the rotor 2 that can be referred to as widened line contact. Ultimately, these are axially extending, segment-like contact surfaces that are more or less pronounced depending on the deformation of the round 6.
  • Fig. 3 shows the object from the Fig. 1 and 2 in a schematic side view, partly in section.
  • Fig. 3 It can be clearly seen that the round 6, designed as a sheet metal round in the exemplary embodiment selected here, is incorporated into the material of the hub 4 of the impeller 3.
  • the circular blank 6 is overmolded with the same material as the impeller, for example plastic.
  • Fig. 3 further shows that the circular blank 6 has an enlarged area 7 on one side.
  • the impeller 3 with the cast-in circular blank 6 is designed in such a way that the impeller 3 can be automatically pressed onto the rotor 2 for both conveying directions. A single impeller must be kept for both conveying directions, which considerably reduces storage costs. Maximum flexibility is given.
  • Fig. 4 shows the impeller 3 of the arrangement from FIG Figs. 1 to 3 , without rotor.
  • the hub 4 of the impeller 3 is equipped on the inside with the round 6, which is octagonal.
  • the flat surfaces 9 extending between the corners 8 of the circular blank 6 have a common smallest radius, formed by the respective central point of contact of these surfaces 9 with an inscribed circle. In relation to the area of the rotor 2, this radius must be smaller than the outer diameter of the rotor 2 so that the hub 4 with the integrated circular blank 6 can be pressed onto the rotor, with deformation of the circular blank 6, more precisely the one between the corners 8 extending, originally flat surfaces 9.
  • Fig. 5 shows the item Fig. 4 in a representation accordingly Fig. 3 , but without motor 1 / rotor 2.
  • the integrated circular blank 6 with its corners 8 and surfaces 9 can also be seen here.
  • FIG. 6 the round 6 in isolated form, in this embodiment as an octagon with surfaces 9 in between, which are used to rest on the rotor 2 and, when the hub 4 or the impeller 3 is pressed onto the rotor 2, for deformation, whereby the mechanical hold is achieved corresponding voltage results.
  • Fig. 6 Furthermore, shows a circumferentially expanded area 7, which makes it easier to slide and press onto the rotor 2 in one direction.
  • discrete widenings 7 are provided in a segmented configuration, which facilitate the pushing on or pressing on in the other direction.
  • Each of the two edge regions can optionally have a circumferential widening 7 or individual, discrete widenings 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP15831133.2A 2014-12-12 2015-12-01 Anordnung eines laufrads auf einem rotierenden teil und verfahren zur herstellung der anordnung Active EP3230595B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201531641T SI3230595T1 (sl) 2014-12-12 2015-12-01 Sestav impelerja na vrtečem se delu in postopek za proizvodnjo sestava

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014225688.7A DE102014225688B3 (de) 2014-12-12 2014-12-12 Anordnung eines Laufrads auf einem rotierenden Teil und Verfahren zur Herstellung der Anordnung
PCT/DE2015/200523 WO2016091256A1 (de) 2014-12-12 2015-12-01 Anordnung eines laufrads auf einem rotierenden teil und verfahren zur herstellung der anordnung

Publications (2)

Publication Number Publication Date
EP3230595A1 EP3230595A1 (de) 2017-10-18
EP3230595B1 true EP3230595B1 (de) 2021-04-28

Family

ID=55299167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15831133.2A Active EP3230595B1 (de) 2014-12-12 2015-12-01 Anordnung eines laufrads auf einem rotierenden teil und verfahren zur herstellung der anordnung

Country Status (7)

Country Link
US (1) US10619641B2 (zh)
EP (1) EP3230595B1 (zh)
CN (1) CN107532602B (zh)
DE (1) DE102014225688B3 (zh)
ES (1) ES2879961T3 (zh)
SI (1) SI3230595T1 (zh)
WO (1) WO2016091256A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014215817A1 (de) * 2014-08-08 2016-02-11 Ziehl-Abegg Se Anordnung eines Laufrads auf einem Elektromotor und Verfahren zur Herstellung der Anordnung
ES2885103T3 (es) 2018-01-02 2021-12-13 Carrier Corp Montaje de ventilador
EP4037149A1 (en) * 2021-02-01 2022-08-03 BSH Hausgeräte GmbH Ec motor, fan with ec motor, and household appliance
DE102021214267A1 (de) 2021-12-13 2023-06-15 Ziehl-Abegg Se Axial-, Diagonal- oder Radialventilator

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US3084963A (en) * 1960-07-29 1963-04-09 Lau Blower Co Resilent fan hub assembly
US3302867A (en) * 1965-10-23 1967-02-07 Joseph T Roffy Fan assembly
FR2469610A1 (fr) * 1979-11-08 1981-05-22 Paris & Du Rhone Perfectionnements aux elements de machines associes a un arbre tournant, notamment roues de ventilateur
US5871335A (en) * 1995-10-31 1999-02-16 Siemens Electric Limited Twist-lock attachment system for a cooling fan and motor
US6073593A (en) * 1997-12-08 2000-06-13 Harvard Industries, Inc. Plastic fan and thermal clutch drive
AUPQ763500A0 (en) * 2000-05-19 2000-06-15 Davey Products Pty Ltd Impeller assembly
TWI220811B (en) 2003-07-16 2004-09-01 Delta Electronics Inc Motor rotor structure and manufacturing method thereof
DE202004010088U1 (de) * 2004-06-25 2004-09-09 Ebm-Papst Mulfingen Gmbh & Co. Kg Laufrad, insbesondere für einen Axialventilator
JP2008069672A (ja) * 2006-09-12 2008-03-27 Nippon Densan Corp ファン
CN101835684B (zh) * 2007-09-20 2013-06-05 罗韧泵有限公司 多边形转子连接装置
CN101494401B (zh) * 2008-01-25 2016-04-06 台达电子工业股份有限公司 具防尘和散热功能的马达和风扇
KR100944543B1 (ko) * 2008-07-31 2010-03-03 주식회사 중원 에스엠이티 마그네트 펌프용 커플러
CN101749280A (zh) * 2010-01-15 2010-06-23 汪祥 一种带吊装支架的风机
DE102011015784A1 (de) * 2010-08-12 2012-02-16 Ziehl-Abegg Ag Ventilator
DE202010011378U1 (de) * 2010-08-13 2011-11-14 Ebm-Papst Mulfingen Gmbh & Co. Kg Ventilator-Laufrad
CN102808801A (zh) * 2011-05-31 2012-12-05 富准精密工业(深圳)有限公司 散热风扇
JP5993602B2 (ja) * 2012-04-23 2016-09-14 ミネベア株式会社 送風機
DE102014219046A1 (de) * 2014-09-22 2016-03-24 Mahle International Gmbh Lüfterrad

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Also Published As

Publication number Publication date
SI3230595T1 (sl) 2021-08-31
US10619641B2 (en) 2020-04-14
ES2879961T3 (es) 2021-11-23
EP3230595A1 (de) 2017-10-18
CN107532602A (zh) 2018-01-02
WO2016091256A1 (de) 2016-06-16
US20170321706A1 (en) 2017-11-09
DE102014225688B3 (de) 2016-03-31
CN107532602B (zh) 2020-02-18

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