US20120093650A1 - Fan wheel for a blower module - Google Patents

Fan wheel for a blower module Download PDF

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Publication number
US20120093650A1
US20120093650A1 US13/264,791 US201013264791A US2012093650A1 US 20120093650 A1 US20120093650 A1 US 20120093650A1 US 201013264791 A US201013264791 A US 201013264791A US 2012093650 A1 US2012093650 A1 US 2012093650A1
Authority
US
United States
Prior art keywords
fan
fan wheel
fan blades
grooves
balancing
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.)
Abandoned
Application number
US13/264,791
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English (en)
Inventor
Martin Huber
Detlef Prahl
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HUBER, MARTIN, PRAHL, DETLEF
Publication of US20120093650A1 publication Critical patent/US20120093650A1/en
Abandoned 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
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • 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
    • F04D29/662—Balancing of rotors
    • 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
    • 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

Definitions

  • the present invention proceeds from a fan wheel for a blower module.
  • blower modules are known from a wide variety of different industrial applications, for example they are used for ventilating various technical appliances or for channeling the air stream when used in air-conditioning systems of motor vehicles.
  • the fans of the blower modules are balanced following installation.
  • balancing weights e.g. in the form of (balancing) clips
  • the balancing weights are fixed in the selected position by resilience and frictional fitting.
  • the balancing weights are usually fastened exclusively on the (axial) inside of the fan blades, this side being directed toward the fan center point, and they are secured here by form fitting against the radially acting centrifugal forces.
  • the disadvantage here is that the fan has to be configured such that an edge, on which the balancing weights can be fastened, is provided on the inside of the fan blades. Furthermore, this fastening edge also has to be freely accessible once the fan has been installed on the motor. In many cases, these requirements are not met.
  • a further disadvantage is that, in the case of such fastening, with balancing of moments and/or dynamic balancing, the quality of balancing is dependent on whether the measuring plane and the balancing plane are positioned correctly in relation to one another. The operator or installer, however, can install the balancing weights axially at any desired height or in any desired plane, as a result of which the balancing quality realized is dependent on the skill of the installer.
  • the balancing weights are at the end of the radially oriented fan blades.
  • the balancing weight or weights is/are thus positioned at the maximum fan diameter, and therefore the balancing weight is relatively distant from the axis of rotation, or center axis, of the fan wheel. It is thus possible to select a lower weight for the balancing elements.
  • This positioning also makes it possible for the region in which the balancing weights have to be fitted for balancing purposes still to be very easily accessible even once the fan has been installed. Handling for the operator is more straightforward and the risk of the balancing weight accidentally passing into the blower module during installation, and causing malfunctioning as a result, is lower.
  • the balancing weights are advantageously designed as (balancing) clips and are fastened in a form-fitting and/or force-fitting manner at the ends of the fan blades.
  • the (balancing) clips here usually consist of steel. However, it is basically also possible to use, for this balancing method, other resilient materials, which should have the highest density possible in order that the volume can be kept appropriately small.
  • the (balancing) clips differ in size, in order for it to be possible to provide the operator with a selection of different balancing masses. It is also possible to use different shapes. On the one hand, the (balancing) clip is adapted to the shape of the fan blade and, on the other hand, the attempt is made, by configuring the (balancing) clips in a suitable manner, to improve the form fitting or frictional fitting.
  • the inside and outside of the radially oriented fan blades contain grooves, in which the (balancing) clips engage in a form-fitting manner by way of their clamping edges.
  • these grooves it is advantageously the case that the (balancing) clips are secured against being slung off axially not only by frictional fitting, but also by corresponding form fitting.
  • the grooves ensure always the same axial positioning of the (balancing) clips, which helps to achieve a uniform quality for the balancing of moments, since the balancing plane is clearly defined.
  • the radially oriented fan blades form a fan ring, which is made up alternately of short and long fan blades, wherein the (balancing) clips and the grooves for the (balancing) clips are provided at the radial end of the fan blades.
  • the balancing clips are arranged preferably on the long fan blades, since these are designed to be stiffer than the short fan blades and are thus less likely to vibrate.
  • the fan wheel is produced preferably by injection molding, wherein the grooves can advantageously be demolded from the mold without any additional outlay.
  • the fan wheel is a constituent part of a blower module, which is connected to a drive unit comprising an electric motor.
  • the fan wheel here is connected in a rotationally fixed manner to the drive shaft of the electric motor.
  • FIG. 1 shows a first perspective view of a blower module
  • FIG. 2 shows a second view (of part) of the blower module
  • FIG. 3 shows a first perspective view of a fan wheel
  • FIG. 4 shows a second perspective view of the fan wheel
  • FIG. 5 shows an enlarged detail of the fan wheel with a balancing element fastened on a fan blade
  • FIG. 6 shows an enlarged illustration of the balancing weight fastened on a fan blade.
  • the blower module 2 illustrated in FIG. 1 comprises a basic housing 4 , on which a fan wheel 6 is mounted such that it can be rotated on a drive shaft 7 .
  • the fan wheel 6 is fastened on the drive shaft 7 by way of its hub 5 .
  • the (radial) fan wheel 6 has, on its outer end side, an axial fan ring 8 , which is made up of curved fan blades 9 .
  • the (radial) fan wheel 6 also has a radial fan ring 10 , which is likewise made up of curved fan blades, referred to hereinbelow as radial fan blades 12 .
  • the radial fan ring 10 has two different types of fan blade 12 .
  • a first group comprises long fan blades which extend as far as the hub 5 , and will be referred to hereinbelow as long fan blades 14
  • a second group comprises short fan blades 16 which, as seen from the external diameter of the radial fan ring 10 , extend only some way in the direction of the axis of rotation.
  • the two groups of fan blades 14 , 16 are formed alternately on the (radial) fan wheel 6 .
  • the functioning of such a radial blower is known and will therefore not be explained in any more detail.
  • the essential factor is that the air is taken in via the axial fan ring 8 , deflected through 90°, compressed and then blown out via the radial fan ring 10 .
  • a clip element which serves as a balancing weight and will be referred to hereinbelow as a balancing clip 18 , is plugged and fastened if required, following installation of the blower module 2 , on an outer radial end of a long fan blade 14 .
  • the inside and outside of the long fan blades 14 contain grooves 20 and 22 , which run parallel to the axis of rotation of the fan wheel 6 and in which—as can be seen, for example, from FIG. 6 —the clamping edges of the balancing clip 18 can engage in a form-fitting manner. This ensures that, despite high blower speeds, the balancing clip 18 is fastened securely on the fan blade 14 .
  • the length of grooves 20 , 22 here corresponds substantially with the width of the balancing clips 18 , and therefore the balancing clips 18 are prevented from slipping laterally.
  • Balancing takes place as follows.
  • the blower module 2 is mounted, in the ready-installed state, in a measuring apparatus.
  • the rotor i.e. the armature of the motor and the fan wheel 6 , is set in rotation by virtue of the motor being switched on.
  • Suitable measuring sensors pick up the dynamic forces in the predetermined measuring planes and the respective imbalance is displayed to the operator in terms of magnitude and angle.
  • the measuring apparatus uses this to calculate the necessary balancing mass and the balancing angle, and indicates this correspondingly to the operator.
  • the operator uses the display information (and his experience) to fit the balancing clips 18 on the corresponding fan blade 14 , and then starts a monitoring-measurement operation.
  • the blower module 2 here is balanced in two planes which are positioned as far apart from one another as possible. It is only this which ensures that both the static equilibrium and the balancing of moments are improved, wherein the second plane in this fan is located in the region which is designated 9 in FIG. 1 .
  • the number of balancing clips 18 which are necessary depends on the magnitude and angular position of the imbalance measured. Balancing is ideally achieved with a maximum of two balancing clips, i.e. one balancing clip for each plane. In practice, it is quite possible for two or three balancing clips to be placed in different positions along each plane, in order for an adequate result to be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US13/264,791 2009-04-16 2010-03-25 Fan wheel for a blower module Abandoned US20120093650A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009002418.2 2009-04-16
DE102009002418A DE102009002418A1 (de) 2009-04-16 2009-04-16 Lüfterrad für ein Gebläsemodul
PCT/EP2010/053926 WO2010118942A1 (de) 2009-04-16 2010-03-25 Lüfterrad für ein gebläsemodul

Publications (1)

Publication Number Publication Date
US20120093650A1 true US20120093650A1 (en) 2012-04-19

Family

ID=42224800

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/264,791 Abandoned US20120093650A1 (en) 2009-04-16 2010-03-25 Fan wheel for a blower module

Country Status (6)

Country Link
US (1) US20120093650A1 (de)
EP (1) EP2419645A1 (de)
KR (1) KR20120012794A (de)
CN (1) CN102395796A (de)
DE (1) DE102009002418A1 (de)
WO (1) WO2010118942A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103728111A (zh) * 2013-12-13 2014-04-16 中国燃气涡轮研究院 一种降低叶片高周疲劳试验件频率的配重块连接结构
US20140356168A1 (en) * 2013-03-15 2014-12-04 Regal Beloit America, Inc. Centrifugal fan impeller with variable shape fan blades and method of assembly
WO2016157471A1 (ja) * 2015-04-01 2016-10-06 三菱電機株式会社 送風機および空気調和機
US9970309B2 (en) 2014-08-05 2018-05-15 Bosch Mahle Turbo Systems Gmbh & Co. Kg Method for producing a rotor of a charging apparatus
US11041502B2 (en) 2018-01-30 2021-06-22 Carrier Corporation Double inlet backward curved blower
US11242864B2 (en) 2016-10-18 2022-02-08 Carrier Corporation Asymmetric double inlet backward curved blower
US20220381508A1 (en) * 2021-05-28 2022-12-01 Grad Aps Apparatus for beverage container temperature control

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023200065A1 (de) 2023-01-04 2024-07-04 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Lüfterrad und Lüftervorrichtung mit einem solchen Lüfterrad

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4025231A (en) * 1975-11-26 1977-05-24 Revcor, Inc. Propeller fan construction
US5800127A (en) * 1995-12-28 1998-09-01 Industrie Magneti Marelli S.P.A. Method of balancing fan rotors, particularly electric fans for use in motor vehicles
US7305905B2 (en) * 2004-01-09 2007-12-11 The Bergquist Torrington Company Rotatable member with an annular groove for dynamic balancing during rotation

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315750A (en) * 1966-04-18 1967-04-25 Vincent N Delaney Fan balancing means
JP3111738B2 (ja) * 1993-04-02 2000-11-27 松下電器産業株式会社 送風機羽根車及びそのバランスウェイト
DE29615144U1 (de) * 1996-08-30 1998-01-02 Robert Bosch Gmbh, 70469 Stuttgart Radiallüfter
CN1074098C (zh) * 1997-08-18 2001-10-31 台达电子工业股份有限公司 鼓风机的导流装置
DE19957030A1 (de) * 1999-11-26 2001-05-31 Bosch Gmbh Robert Klammer zum Auswuchten
FI20011135A0 (fi) * 2001-05-31 2001-05-31 Flaekt Oy Puhaltimen siipipyörän tasapainotus
ES2297657T3 (es) * 2005-05-04 2008-05-01 Denso Thermal Systems S.P.A. Equipo para equilibrar automaticamente unidades de ventilacion de vehiculos.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4025231A (en) * 1975-11-26 1977-05-24 Revcor, Inc. Propeller fan construction
US5800127A (en) * 1995-12-28 1998-09-01 Industrie Magneti Marelli S.P.A. Method of balancing fan rotors, particularly electric fans for use in motor vehicles
US7305905B2 (en) * 2004-01-09 2007-12-11 The Bergquist Torrington Company Rotatable member with an annular groove for dynamic balancing during rotation

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140356168A1 (en) * 2013-03-15 2014-12-04 Regal Beloit America, Inc. Centrifugal fan impeller with variable shape fan blades and method of assembly
US9689264B2 (en) * 2013-03-15 2017-06-27 Regal Beloit America, Inc. Centrifugal fan impeller with variable shape fan blades and method of assembly
CN103728111A (zh) * 2013-12-13 2014-04-16 中国燃气涡轮研究院 一种降低叶片高周疲劳试验件频率的配重块连接结构
US9970309B2 (en) 2014-08-05 2018-05-15 Bosch Mahle Turbo Systems Gmbh & Co. Kg Method for producing a rotor of a charging apparatus
WO2016157471A1 (ja) * 2015-04-01 2016-10-06 三菱電機株式会社 送風機および空気調和機
CN106050734A (zh) * 2015-04-01 2016-10-26 三菱电机株式会社 送风机以及空调机
JPWO2016157471A1 (ja) * 2015-04-01 2017-11-16 三菱電機株式会社 送風機および空気調和機
US11242864B2 (en) 2016-10-18 2022-02-08 Carrier Corporation Asymmetric double inlet backward curved blower
US11041502B2 (en) 2018-01-30 2021-06-22 Carrier Corporation Double inlet backward curved blower
US11873831B2 (en) 2018-01-30 2024-01-16 Carrier Corporation Double inlet backward curved blower
US20220381508A1 (en) * 2021-05-28 2022-12-01 Grad Aps Apparatus for beverage container temperature control

Also Published As

Publication number Publication date
WO2010118942A1 (de) 2010-10-21
EP2419645A1 (de) 2012-02-22
CN102395796A (zh) 2012-03-28
DE102009002418A1 (de) 2010-10-21
KR20120012794A (ko) 2012-02-10

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HUBER, MARTIN;PRAHL, DETLEF;REEL/FRAME:027469/0031

Effective date: 20111114

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION