EP3030792B1 - Laufrad für axiallüfter - Google Patents

Laufrad für axiallüfter Download PDF

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Publication number
EP3030792B1
EP3030792B1 EP15730394.2A EP15730394A EP3030792B1 EP 3030792 B1 EP3030792 B1 EP 3030792B1 EP 15730394 A EP15730394 A EP 15730394A EP 3030792 B1 EP3030792 B1 EP 3030792B1
Authority
EP
European Patent Office
Prior art keywords
impeller
case
carrier disc
blade root
sleeves
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
EP15730394.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3030792A1 (de
Inventor
Frank Kinzer
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.)
TLT Turbo GmbH
Original Assignee
TLT Turbo GmbH
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 TLT Turbo GmbH filed Critical TLT Turbo GmbH
Publication of EP3030792A1 publication Critical patent/EP3030792A1/de
Application granted granted Critical
Publication of EP3030792B1 publication Critical patent/EP3030792B1/de
Active 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
    • 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
    • F04D29/34—Blade mountings
    • 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
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • 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
    • 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
    • F04D29/60—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors

Definitions

  • the invention relates to an impeller for an axial fan with an impeller body having an outer impeller shell and a support disc having a hub for rotationally fixed connection to a drive shaft, wherein on the support disc a plurality of radially outwardly directed blades are arranged, each having a Have blade root and an airfoil.
  • An impeller for an axial fan often consists of an impeller body, a plurality of radially outwardly directed blades and elements for attachment of the blades on the impeller body.
  • Anströmhaube is provided to reduce vortex.
  • the impeller body includes, inter alia, an outer impeller shell for flow guidance, a support disk and a hub for the rotationally fixed coupling of a drive shaft.
  • the impeller body may be integrally formed and in this case z. B. be made by welding, casting or forging.
  • the impeller body and multi-part, z. B. be constructed with screwed individual components.
  • the blades as primarily aerodynamically active components generally comprise an airfoil and a blade root for attachment to the Schaufelrad emotions. Also for the blades come a variety of manufacturing processes, such. For example, forging, casting, pressing or milling into consideration.
  • the impeller of the axial fan comprises a cylindrical support disc and a plurality of blades, each having a blade root and an airfoil.
  • a jaw pair is provided in each case.
  • the jaws of each jaw pair are arranged for this purpose on both sides of the support plate and bolted to it. All jaws are identical in terms of their shape insofar as they are arbitrarily interchangeable.
  • Each jaw merges in its radially outwardly directed area into a radially outwardly facing skirt.
  • the partially overlapping aprons together on each side of the impeller form a circumferential hub ring for optimizing the flow guidance.
  • this known impeller When assembling this known impeller can also rotate the blades before clamping in a defined by the jaws picking test by tightening through bolts and nuts about their own longitudinal axis, so that the angle of attack of each blade can be set freely. Furthermore, two spacers and a clamping sleeve are added to each through-bolt.
  • a disadvantage of this embodiment is that the jaws are designed as pressed parts, castings or forgings with a comparatively complex three-dimensional geometry.
  • the object of the invention is therefore to provide an impeller for an axial fan, which can be manufactured inexpensively using primarily simple-shaped standard components.
  • an impeller for an axial fan with an impeller body having an outer impeller shell and a support disc having a hub for rotationally fixed connection to a drive shaft, wherein on the support disc a plurality of radially outwardly directed blades are arranged, each having a blade root and have an airfoil.
  • each blade root has a fastening portion which is positively received between two trapezoidal, triangular, or rectangular fastening segments arranged on both sides opposite one another on the support disk, and the respective two opposite fastening segments and the support disk each have at least two through holes for receiving a short sleeve and a long sleeve and the attachment portion is firmly clamped by means of each plugged through the sleeves bolts and nuts between two opposite fastening segments, each blade root is guided in each case a recess of the support disc, wherein the sleeves each have a collar on one side and further comprise a shaft and the shaft is at least partially positively received in each one of the through holes in the fastening segments.
  • the impeller can be made using comparatively simple and therefore in the production of cost-effective items.
  • the invention also allows the reduction of the variety of parts by the extensive use of identical parts, even with different impeller sizes.
  • the sleeves are used inter alia to initiate the high radial forces in the support plate, which is not mandatory as a disc, but z. B. may also be designed as a spoke construction or the like.
  • the recesses each have a rectangular shape. Accordingly, the support disc between each two adjacent blade roots on a radially outwardly directed, trapezoidal material region or a gear-like peripheral contour.
  • the sleeves are in each case a short sleeve and a sleeve of longer design, each having a collar on one end face.
  • the short and long sleeves are positively inserted in the fasteners and the support disk, the collar of the short and the long sleeve in its centering, however, not.
  • an at least one-sided axial position limitation of the sleeve in the through holes is given.
  • only two additional parts are to be mounted for each through hole or bolt with nut.
  • each blade root is guided in a bore of the impeller shell.
  • the positional fixation of the blades is improved on the impeller body.
  • the axial gap between the support disk and mounting segment can be reduced to almost zero.
  • a shaft length of each first sleeve is substantially larger than a shaft length of each second sleeve.
  • each attachment portion of a blade root is a cylinder with at least one circumferentially circumferential annular groove.
  • FIG. 1 shows a plan view of a section of an impeller according to the invention for an axial fan.
  • the impeller 10 for an axial fan or axial fan not shown, has inter alia an impeller body 12 with an outer impeller shell 14 and a support plate 16.
  • a hub 18 is arranged for rotationally fixed connection with a drive shaft 20 centrally.
  • Attached to the support disk 16 are a plurality of blades, one blade of which is representatively designated by the reference numeral 22.
  • the blade 22 has a blade root 24 and an airfoil 26.
  • the blade root 24 of the blade 22 is, like all others, firmly clamped between two oppositely mounted on the support plate 16 trapezoidal, rectangular or triangular fastening segments, of which only one front trapezoidal, rectangular or triangular fastening segment 28 is visible.
  • the blade 22, like the others Prior to clamping the fastening segments, the blade 22, like the others, can be pivoted freely around its axis of rotation 38 so that optimal angles of attack of the blades 22 of the rotor 10 can be set for different application scenarios.
  • FIG. 2 illustrates a cross section along the section line of II-II of Fig. 1 ,
  • the fastening segment 28 is braced by means of the threaded bolts 32, 36 and the nuts 40, 42 screwed onto these with a further fastening segment 44 disposed opposite to the support disk 16, and with the support disk 16 connected.
  • Each bolt 32, 36 is in each case in a long sleeve 46 and a short sleeve 48 and another long sleeve 50 and another short sleeve 52 added, whose better illustrative overview half unsigned shafts are separated by an annular gap 54, 56 from each other ,
  • the sleeves 46 to 52 each have a hollow cylindrical shape and the annular gaps 54, 56 may also be approximately zero in width.
  • the likewise not designated shaft length of the long sleeves 46, 50 is substantially larger than a shaft length of the short sleeves 48, 52.
  • the sleeves 46 to 52 are each in a cylindrical through hole 58, 60, which are the two fastening segments 28, 44 and the support plate sixteenth completely penetrated, added.
  • a radial clearance between the sleeves 46 to 52 and the through holes 58, 60 is preferably of the order of zero.
  • a slight interference fit may be provided.
  • the through holes 58, 60 may each have cylindrical counterbores 62 to 68 in which the sleeves 46 to 52 are received.
  • a respective collar 70, 72, 74 or 76 of the sleeves 46 to 52 is not positively received, but only the shafts of the sleeves 46 to 52.
  • the countersinks 62 to 68 are in each case in non-designated and away from the support plate 16 tops of the two Attachment segments 28, 44 introduced.
  • an axial gap 82, 84 each clearly smaller than the annular gaps 54, 56 between the long and the short sleeve 46, 48 and the other long and another short sleeve 50, 52.
  • the sleeves 46 to 52 serve primarily to accommodate the axial centrifugal forces acting on the blades high centrifugal forces, while the collars 70, 72, 74, 76 have a similar function for the heads of bolts and the nuts as conventional, separate pads.
  • the hidden here screw bolts and all other bolts are used in sleeves of the same structural design. It is important that the fastening segments 28, 44 do not necessarily abut the support disk 16 - ie both axial gaps 82, 84 are greater than zero in this constellation - but nevertheless can.
  • FIG. 3 shows a cross section along the section line of III-III of Fig. 1 ,
  • the underside of the blade 26 of the blade 22 preferably integrally formed blade root 24 has a contoured mounting portion 90.
  • the contoured mounting portion 90 is formed as a cylinder 92 with a recessed, circumferentially encircling annular groove 94.
  • Each fastening segment 28, 44 has a recess 96, 98 symbolized by a dotted line, in which the fastening section 90 is received in a form-fitting manner with an exact fit.
  • a bore 100 for the implementation of the fastening portion 90 of the blade root 24 is introduced.
  • an approximately rectangular recess 102 is inserted below the blade root 24, which is necessary for receiving the blade root 24. Accordingly, a circumferential contour of the support plate 16 is formed like a toothed wheel, such that in each case a radially outwardly directed trapezoidal material region remains between each two adjacent recesses.
  • Both the bore 100 and the recess 102 serve to optimize the guidance of the blade 22 on the support disk 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP15730394.2A 2014-06-24 2015-06-16 Laufrad für axiallüfter Active EP3030792B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014009051.5A DE102014009051A1 (de) 2014-06-24 2014-06-24 Laufrad für Axiallüfter
PCT/EP2015/001210 WO2015197167A1 (de) 2014-06-24 2015-06-16 Laufrad für axiallüfter

Publications (2)

Publication Number Publication Date
EP3030792A1 EP3030792A1 (de) 2016-06-15
EP3030792B1 true EP3030792B1 (de) 2018-12-19

Family

ID=53442716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15730394.2A Active EP3030792B1 (de) 2014-06-24 2015-06-16 Laufrad für axiallüfter

Country Status (8)

Country Link
US (1) US10132326B2 (ru)
EP (1) EP3030792B1 (ru)
CN (1) CN105637227B (ru)
AU (1) AU2015281410B2 (ru)
DE (1) DE102014009051A1 (ru)
ES (1) ES2714277T3 (ru)
RU (1) RU2645887C2 (ru)
WO (1) WO2015197167A1 (ru)

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Publication number Priority date Publication date Assignee Title
USD839406S1 (en) * 2017-03-23 2019-01-29 Ebm-Papst Mulfingen Gmbh & Co. Kg Connecting element for fan blades
CN107100894A (zh) * 2017-07-05 2017-08-29 陕西金翼通风科技有限公司 一种通风机用叶片、叶轮及叶轮的安装方法
CN107143524A (zh) * 2017-07-05 2017-09-08 陕西金翼通风科技有限公司 一种新型轴流通风机用叶片
JP7514060B2 (ja) * 2019-03-22 2024-07-10 Ntn株式会社 水力発電装置の水車翼取付け構造および水力発電装置
WO2020040098A1 (ja) * 2018-08-20 2020-02-27 Ntn株式会社 水力発電装置の水車翼取付け構造および水力発電装置
JP2020139498A (ja) * 2019-02-22 2020-09-03 Ntn株式会社 水力発電装置の水車翼
CN110374919A (zh) * 2019-08-19 2019-10-25 南通迪瓦特节能风机有限公司 一种消音环冷轴流风机用叶轮
CN110899634B (zh) * 2019-12-17 2020-11-27 浙江上风高科专风实业有限公司 一种高效低噪轴流风机的优化生产方法
DE102020127312A1 (de) * 2020-10-16 2022-04-21 Ebm-Papst Mulfingen Gmbh & Co. Kg Lüfter mit einem Rotor und einem Lüfterrad
CN112503023A (zh) * 2020-11-25 2021-03-16 柳丽 一种轴流风机叶轮
CN114992158B (zh) * 2022-08-04 2022-10-25 常州市安禾电器有限公司 一种金属冲压件及其安装结构

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US2232670A (en) * 1938-08-25 1941-02-18 Barrett Arthur Lee Fan hub construction
US5573376A (en) * 1995-09-29 1996-11-12 Sundstrand Corporation Bladed device and method of manufacturing same
SE508695C2 (sv) * 1996-04-26 1998-10-26 Flaekt Ab Axialfläkthjul
GB2390647B (en) * 2002-05-03 2005-05-18 Truflo Air Movement Ltd Axial flow impeller
CN2802137Y (zh) * 2005-01-07 2006-08-02 徐其丰 插嵌式扇叶组合结构
DE102006001909B4 (de) 2006-01-14 2010-06-10 Howden Ventilatoren Gmbh Laufrad eines Ventilators
CN2931878Y (zh) * 2006-08-10 2007-08-08 珀金斯动力(天津)有限公司 装有弹性联接组件的风扇
TWM334886U (en) * 2007-12-12 2008-06-21 Taiwei Fan Technology Co Ltd Combination type miniature axial-flow fan
GB0821823D0 (en) * 2008-11-28 2009-01-07 Truflo Air Movement Ltd Fan assembly
CN201439764U (zh) * 2009-07-27 2010-04-21 中山大洋电机股份有限公司 一种外转子轴流风扇
RU130353U1 (ru) * 2012-09-11 2013-07-20 Открытое акционерное общество "Научно-исследовательский проектно-конструкторский институт горного и обогатительного машиностроения" (ОАО "НИПИГОРМАШ") Рабочее колесо осевого вентилятора
US10502235B2 (en) * 2013-11-06 2019-12-10 United Technologies Corporation Method for tight control of bolt holes in fan assembly

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Also Published As

Publication number Publication date
CN105637227B (zh) 2018-11-06
RU2645887C2 (ru) 2018-02-28
ES2714277T3 (es) 2019-05-28
DE102014009051A1 (de) 2015-12-24
WO2015197167A1 (de) 2015-12-30
AU2015281410B2 (en) 2017-10-26
US10132326B2 (en) 2018-11-20
CN105637227A (zh) 2016-06-01
AU2015281410A1 (en) 2016-03-24
EP3030792A1 (de) 2016-06-15
US20170122335A1 (en) 2017-05-04
RU2016115551A (ru) 2017-10-26

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