EP2478226A1 - Lüfter für eine brennkraftmaschine - Google Patents
Lüfter für eine brennkraftmaschineInfo
- Publication number
- EP2478226A1 EP2478226A1 EP10749878A EP10749878A EP2478226A1 EP 2478226 A1 EP2478226 A1 EP 2478226A1 EP 10749878 A EP10749878 A EP 10749878A EP 10749878 A EP10749878 A EP 10749878A EP 2478226 A1 EP2478226 A1 EP 2478226A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan
- fan blades
- blades
- different
- internal combustion
- 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.)
- Granted
Links
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
- F04D29/327—Rotors specially for elastic fluids for axial flow pumps for axial flow fans with non identical blades
-
- 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
- F04D25/022—Units comprising pumps and their driving means comprising a yielding coupling, e.g. hydraulic
-
- 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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
Definitions
- the invention relates to a fan according to the preamble of claim 1.
- a fan for an internal combustion engine with axial blades is described.
- eight Axialsch are mounted on a fan hub pads, and in the inner region of the fan, a fluid friction clutch is arranged, which has on its front side radially extending cooling fins.
- Both the eight axial blades and the cooling fins are each constructed identically to one another and arranged uniformly or regularly spaced on the fan housing.
- the object of the present invention to provide a fan in which the natural frequencies of the individual fan blades do not add up to the attachments, so that the material and manufacturing costs for these attachments can be reduced.
- the object of the present invention is achieved by a fan having the features according to claim 1. Advantageous developments of the present invention are defined in the subclaims.
- a fan for an internal combustion engine which is drivable by means of a fluid friction clutch of an internal combustion engine via a drive shaft or a belt drive, wherein the fan has a fan housing with a plurality of fan blades formed thereon, and wherein the fan is designed such that it has different natural frequencies at least over a partial area.
- the detuning of at least areas of the fan or the distribution of the natural frequencies caused by a corresponding design of the fan causes the reaction forces to be distributed over a broad frequency spectrum. This in turn causes the maximum component loads are reduced, so that the component costs can be reduced. Particularly advantageous is i here that cheaper bearings can be used.
- At least two of the plurality of fan blades are designed such that they have different frequency frequencies.
- each of the plurality of fan blades is formed to have a natural frequency different from the other fan blades.
- each of the plurality of fan blades ribs the ribs which are formed differently from the plurality of fan blades at at least two of the plurality of fan blades, in particular in each ⁇ .
- a different number of ribs may be provided underneath each fan blade.
- the ribs may be arranged differently with respect to their position and orientation.
- the ribs are cooling fins.
- the ribs are preferably arranged in the region of a hub of the fan. It is even more preferable if at least two of the plurality of fan blades, in particular each of the plurality of fan blades, are formed with a different profile.
- At least two of the plurality of fan blades, in particular each of the plurality of fan blades, have a different profile thickness distribution.
- At least one of the plurality of fan blades is designed as a circular arc profile.
- the maximum sheet thickness of at least one of the plurality of fan blades is shifted with respect to the center of the profile.
- at least one of the plurality of fan blades has a local mass accumulation.
- the local mass is accumulated in a blade tip region of the at least one of the plurality of fan blades. It is also possible to achieve a detuning of the fan blades by means of mark injections in a simple and therefore cost-effective manner.
- the fan has a flange, which is designed asymmetrically.
- the flange ring is an insertion flange, which has a local weakening.
- Fig. 1 is a front view of a fan according to the prior art
- Fig. 2 is a sectional view of a profile of a fan blade according to the prior art.
- FIG 3 is a front view of a portion of a fan according to an embodiment.
- Fig. 1 shows a front view of a fan 1 in the air flow direction seen in the prior art, which is used to promote cooling air through the radiator of a motor vehicle.
- the fan 1 is designed as an axial fan and has eight axial blades or fan blades 2, which are arranged on a hub 4.
- a fluid coupling 3 is provided, which has on its front side radially extending ribs 5, which serve as a cooling rib n.
- the fan 1 is connected in a manner not shown here with the output side of the fluid coupling.
- the fluid coupling 3 is also driven via a central drive shaft 7.
- the fluid coupling 3 ensures in a known manner that a fan blades 8 exhibiting fan blades 8 more or less fast depending on the cooling air temperature.
- buoyant air guide elements 6 are additionally arranged here, which serve to influence the air flow.
- the direction of rotation of the fan is indicated by the arrow marked by A Neten.
- the fan blades 2 are arranged uniformly spaced around the circumference of the hub 4 and each have the same shape and size, ie old eight blades 2 are formed identically.
- the cooling fins 5 are arranged uniformly or rotationally symmetrically about the axis of rotation of the drive shaft 7.
- Fig. 2 is a sectional view of a profile of a single fan blade 2 according to the prior art.
- This known profile of a Viscolmajers according to the prior art is designed as a circular arc profile, which has a thickness D 9 at a front edge 9 of the fan blade 2, which is identical to a thickness D 10 at a trailing edge 10 of the fan blade 2.
- fan blade 2 is beyond the range of maximum thickness D ma of the fan blade 2 in the middle of the profile.
- the natural frequency of the fan blade 2 can be easily changed. Also, a change in the natural frequency of the fan blade 2 can be caused by changing the thickness distribution of the profile. For example, it is possible to form the leading edge 9 with a different thickness D 9 than the thickness D 10 of the trailing edge 10 of the fan blade 2 to effect the change of the natural frequency of the fan blade 2.
- FIG. 3 shows a front view of a portion in the air flow direction of a fan 1 according to an embodiment.
- the fan 1 is provided with a plurality of Lunderblältern 2, of which only a part is shown here, which on a hub 4 and a fan housing 12, in which also
- the individual fan blades 2 differ in that they have different mass distributions from one another.
- the fan blade 2 ' has a mass accumulation in a blade tip region 11.
- the individual fan blades 2, 2 ' may also have a different stiffness or material injections of different types.
- Each of the already enumerated changes of the fan blades 2, 2 ' is suitable for causing a change in their natural frequency.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910041616 DE102009041616A1 (de) | 2009-09-17 | 2009-09-17 | Lüfter für eine Brennkraftmaschine |
PCT/EP2010/063166 WO2011032867A1 (de) | 2009-09-17 | 2010-09-08 | Lüfter für eine brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2478226A1 true EP2478226A1 (de) | 2012-07-25 |
EP2478226B1 EP2478226B1 (de) | 2016-02-10 |
Family
ID=43066520
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10749878.4A Not-in-force EP2478226B1 (de) | 2009-09-17 | 2010-09-08 | Lüfter für eine brennkraftmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2478226B1 (de) |
DE (1) | DE102009041616A1 (de) |
WO (1) | WO2011032867A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD860427S1 (en) | 2017-09-18 | 2019-09-17 | Horton, Inc. | Ring fan |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3312430A1 (de) * | 2014-08-07 | 2018-04-25 | Mitsubishi Electric Corporation | Axiallüfter und klimatisierungsvorrichtung mit axiallüfter |
US11767761B2 (en) | 2018-08-02 | 2023-09-26 | Horton, Inc. | Low solidity vehicle cooling fan |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1111334B (de) * | 1959-09-04 | 1961-07-20 | Paul Pollrich & Comp | Ventilator oder Kreiselpumpe mit Gehaeuse |
DE3716326A1 (de) * | 1987-05-15 | 1988-12-01 | Schempp Hirth Gmbh & Co Kg | Propeller |
DE3832026A1 (de) * | 1988-09-21 | 1990-03-22 | Bosch Gmbh Robert | Luefterrad |
DE4020742A1 (de) * | 1990-06-29 | 1992-01-02 | Behr Gmbh & Co | Laufrad fuer einen ventilator |
DE4140987A1 (de) * | 1991-12-12 | 1993-06-17 | Behr Gmbh & Co | Axialluefter |
DE29614608U1 (de) * | 1996-08-22 | 1996-12-12 | Georg Kick Fa | Laufrad |
US6073593A (en) * | 1997-12-08 | 2000-06-13 | Harvard Industries, Inc. | Plastic fan and thermal clutch drive |
FR2772830B1 (fr) * | 1997-12-23 | 2000-11-24 | Valeo Thermique Moteur Sa | Ventilateur pour un echangeur de chaleur, notamment d'un vehicule automobile |
DE10100064A1 (de) * | 1999-06-30 | 2002-07-04 | Behr Gmbh & Co | Lüfter mit Axialschaufeln |
DE19929978B4 (de) | 1999-06-30 | 2006-02-09 | Behr Gmbh & Co. Kg | Lüfter mit Axialschaufeln |
DE102005006414A1 (de) * | 2005-02-12 | 2006-08-24 | Mtu Aero Engines Gmbh | Verfahren zum Bearbeiten eines integral beschaufelten Rotors |
-
2009
- 2009-09-17 DE DE200910041616 patent/DE102009041616A1/de not_active Withdrawn
-
2010
- 2010-09-08 EP EP10749878.4A patent/EP2478226B1/de not_active Not-in-force
- 2010-09-08 WO PCT/EP2010/063166 patent/WO2011032867A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2011032867A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD860427S1 (en) | 2017-09-18 | 2019-09-17 | Horton, Inc. | Ring fan |
Also Published As
Publication number | Publication date |
---|---|
EP2478226B1 (de) | 2016-02-10 |
WO2011032867A1 (de) | 2011-03-24 |
DE102009041616A1 (de) | 2011-03-24 |
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