DE3234011A1 - Axial fan - Google Patents
Axial fanInfo
- Publication number
- DE3234011A1 DE3234011A1 DE19823234011 DE3234011A DE3234011A1 DE 3234011 A1 DE3234011 A1 DE 3234011A1 DE 19823234011 DE19823234011 DE 19823234011 DE 3234011 A DE3234011 A DE 3234011A DE 3234011 A1 DE3234011 A1 DE 3234011A1
- Authority
- DE
- Germany
- Prior art keywords
- axial fan
- blades
- teeth
- axial
- leading edges
- 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.)
- Withdrawn
Links
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
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
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
-
- 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
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/303—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the leading edge of a rotor blade
-
- 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
- F05D2250/00—Geometry
- F05D2250/10—Two-dimensional
- F05D2250/18—Two-dimensional patterned
- F05D2250/183—Two-dimensional patterned zigzag
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
■. ϊ. ■. ϊ.
0496704967
AxiallüfterAxial fan
3 23 43 23 4
Die Erfindung bezieht sich auf einen Axiallüfter, insbesondere für einen Haartrockner mit schraubenlinienförmig gekrümmten Schaufeln. Solche Axiallüfter werden in sehr verschiedenen Geräten und Vorrichtungen eingesetzt und sind allgemein bekannt. 5The invention relates to an axial fan, in particular for a hair dryer with helically curved blades. Such axial fans are used in a wide variety of devices and devices and are generally known. 5
So lange die Umfangsgeschwindigkeit der Schaufeln eines Axiallüfter nur mäßig hoch ist, arbeitet der Axiallüfter sehr geräuscharm. Bei manchen Geräten, so z.B. bei Haartrocknern, verlangt man jedoch eine hohe Luftförderleistung bei möglichst kleinem Axial! üfter-Durchmesser. Das bedingt hohe Umfangsgeschwindigkeiten der Lüfterschaufeln, die bei heutigen Haartrocknern an der äußeren Kante der Schaufeln schon bei 50 m/sec liegen. Die Folge solcher hohen Umfangsgeschwindigkeiten ist eine relativ starke Geräuschsbildung, die vielfach als störend empfunden wird.As long as the peripheral speed of the blades of an axial fan is only moderately high, the axial fan works very quietly. However, some devices, such as hair dryers, require a high air flow rate with the smallest possible axial! üfter diameter. This requires high peripheral speeds of the fan blades, which in today's hair dryers are already at the outer edge of the blades 50 m / sec. The consequence of such high peripheral speeds is a relatively strong noise, which is often perceived as annoying.
Der Erfindung liegt die Aufgabe zugrunde, einen Axiallüfter der eingangs genannten Art derart zu gestalten, daß auch bei hohen Umfangsgeschwindigkeiten die Geräuschsentwicklung möglichst gering bleibt. Diese Aufgabe wird auf überraschend einfache Weise dadurch gelöst, daßThe invention is based on the object of designing an axial fan of the type mentioned at the beginning in such a way that the development of noise remains as low as possible even at high circumferential speeds. This object is achieved in a surprisingly simple manner in that die Anströmkanten der Schaufeln in Anströmrichtung vor-und zurückspringend ausgebildet sind.the leading edges of the blades are designed to spring back and forth in the direction of flow.
Überprüfungen eines erfindungsgemäß gestalteten Axiallüfter ergaben eine im Vergleich zu herkömmlichen Axial!üftern mit geraden AnströmTests of an axial fan designed according to the invention resulted one compared to conventional axial fans with a straight inflow kanten ganz erhebliche Geräuschsminderung. Das läßt sich damit er klären, daß die Luft nicht mehr gegen eine gerade Kante auftrifft und entsprechend plötzlich umgelenkt werden muß, sondern gegen gekrümmte bzw. schräg verlaufende Flächen prallt. Der Effekt ist vergleichbar mit dem an einem gewellten oder gezackten Messer im Vergleich zu einemedges very significant noise reduction. He can do that with it clarify that the air no longer hits a straight edge and has to be suddenly deflected, but against a curved edge or inclined surfaces rebound. The effect is similar to that on a corrugated or serrated knife compared to one geraden Messer.straight knife.
3 2 3 A O 13 2 3 A O 1
Die Anströmkante kann ähnlich einem Küchenmesser wellenförmig vor- und zurückspringen. Als ganz besonders vorteilhaft hat es sich jedoch erwiesen, wenn die Anströmkanten sägezahnartige, in der Ebene der Schaufeln liegende Zähne haben.The leading edge can be shaped like a kitchen knife in front and in a wave shape jump back. However, it has proven to be particularly advantageous proven when the leading edges have sawtooth-like teeth lying in the plane of the blades.
Die Zähne sind optimal gestaltet, wenn ihre Flanken mit einem Winkel von 10 - 30° aufeinanderstoßen.The teeth are optimally designed when their flanks are at an angle meet from 10 - 30 °.
Die Erfindung läßt zahlreiche Ausführungsmöglichkeiten zu. Eine davon ist in der Zeichnung dargestellt und wird nachfolgend beschrieben. Es zeigenThe invention allows numerous possible embodiments. One of those is shown in the drawing and is described below. Show it
Figur 1 eine überwiegend als Längsschnitt, teilweise als Seitenansicht gezeichnete Darstellung eines erfindungsgemäßen Axial-FIG. 1 shows a representation drawn predominantly as a longitudinal section, partly as a side view an inventive axial
1üfters,1 fan,
Figur 2 den Axiallüfter gem. Fig. 1 von oben gesehen.2 shows the axial fan according to FIG. 1 seen from above.
Der in der Zeichnung dargestellte Axiallüfter hat eine glockenförmige Marbe 1, auf der außenseitig sieben Schaufeln 2 angebracht sind. Die Drehrichtung des Axial!üfters erfolgt entgegengesetzt dem Uhrzeigersinn, was durch jeweils einen Pfeil in den Figuren gekennzeichnet wurde. Die Luftströmung erfolgt in Figur 1 gesehen von oben nach unten. Auf der Anströmseite, also in Fig. 1 gesehen oben, haben die Schaufeln 2 jeweils eine Anströmkante 3, deren Gestaltung für die Erfindung wesentlich ist.The axial fan shown in the drawing is bell-shaped Marbe 1, on which seven blades 2 are attached on the outside. The direction of rotation of the axial fan is counterclockwise, which was indicated by an arrow in each of the figures. The air flow is seen in Figure 1 from the top below. On the inflow side, that is seen in Fig. 1 above, the blades 2 each have a leading edge 3, the design of which for the Invention is essential.
Die Anströmkanten 3 verlaufen nicht wie üblich gerade, vielmehr sind sie gezahnt und weisen dadurch spitze Zähne z.B. 4, 5 auf. Die Flanken der Zähne 4, 5 stoßen jeweils mit einem Winkel von 10 - 30° aufeinander, so daß die Zähne Spitzen von 10 - 30° haben.The leading edges 3 are not straight as usual, but rather are they are toothed and therefore have pointed teeth, e.g. 4, 5. The flanks of teeth 4, 5 each meet at an angle of 10 - 30 °, so that the teeth have tips of 10 - 30 °.
1 Narbe1 scar
2 Schaufel2 shovel
3 Anströmkante3 leading edge
4 Zahn4 tooth
5 Zahn5 tooth
LeerseiteBlank page
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823234011 DE3234011A1 (en) | 1982-09-14 | 1982-09-14 | Axial fan |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823234011 DE3234011A1 (en) | 1982-09-14 | 1982-09-14 | Axial fan |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3234011A1 true DE3234011A1 (en) | 1984-03-15 |
Family
ID=6173161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19823234011 Withdrawn DE3234011A1 (en) | 1982-09-14 | 1982-09-14 | Axial fan |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3234011A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4761115A (en) * | 1986-03-19 | 1988-08-02 | Standard Elektrik Lorenz Ag | Axial-flow fan |
EP0711925A1 (en) | 1994-11-08 | 1996-05-15 | Mitsubishi Jukogyo Kabushiki Kaisha | Propeller fan |
WO2009090376A1 (en) * | 2008-01-14 | 2009-07-23 | Flakt Woods Limited | A meridional fan |
CN102927046A (en) * | 2012-11-22 | 2013-02-13 | 威海克莱特菲尔风机股份有限公司 | Low-noise efficient impeller of axial-flow fan |
CN103835995A (en) * | 2012-11-22 | 2014-06-04 | 威海克莱特菲尔风机股份有限公司 | Large axial flow impeller provided with blades with tooth-shaped front edges |
US20170058917A1 (en) * | 2015-09-02 | 2017-03-02 | Krista L. McKinney | Single thickness blade with leading edge serrations on an axial fan |
WO2019136939A1 (en) * | 2018-01-13 | 2019-07-18 | 广东美的环境电器制造有限公司 | Axial fan blade, axial fan blade assembly, and axial fan duct assembly |
CN111133201A (en) * | 2017-10-03 | 2020-05-08 | 三菱电机株式会社 | Propeller fan and axial flow blower |
DE102020214653A1 (en) | 2020-11-20 | 2022-05-25 | Ziehl-Abegg Se | Blades of a fan impeller, impeller and fan |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1628267A1 (en) * | 1966-12-01 | 1971-11-04 | Gen Electric | Blade for an axial flow compressor |
US4089618A (en) * | 1974-07-02 | 1978-05-16 | Rotron Incorporated | Fan with noise reduction |
-
1982
- 1982-09-14 DE DE19823234011 patent/DE3234011A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1628267A1 (en) * | 1966-12-01 | 1971-11-04 | Gen Electric | Blade for an axial flow compressor |
US4089618A (en) * | 1974-07-02 | 1978-05-16 | Rotron Incorporated | Fan with noise reduction |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4761115A (en) * | 1986-03-19 | 1988-08-02 | Standard Elektrik Lorenz Ag | Axial-flow fan |
EP0711925A1 (en) | 1994-11-08 | 1996-05-15 | Mitsubishi Jukogyo Kabushiki Kaisha | Propeller fan |
US5603607A (en) * | 1994-11-08 | 1997-02-18 | Mitsubishi Jukogyo Kabushiki Kaisha | Propeller fan |
WO2009090376A1 (en) * | 2008-01-14 | 2009-07-23 | Flakt Woods Limited | A meridional fan |
CN102927046B (en) * | 2012-11-22 | 2015-04-29 | 威海克莱特菲尔风机股份有限公司 | Low-noise efficient impeller of axial-flow fan |
CN103835995A (en) * | 2012-11-22 | 2014-06-04 | 威海克莱特菲尔风机股份有限公司 | Large axial flow impeller provided with blades with tooth-shaped front edges |
CN102927046A (en) * | 2012-11-22 | 2013-02-13 | 威海克莱特菲尔风机股份有限公司 | Low-noise efficient impeller of axial-flow fan |
CN103835995B (en) * | 2012-11-22 | 2016-04-27 | 威海克莱特菲尔风机股份有限公司 | There is the large-scale axial-flow blower of profile of tooth leading edge blade |
US20170058917A1 (en) * | 2015-09-02 | 2017-03-02 | Krista L. McKinney | Single thickness blade with leading edge serrations on an axial fan |
WO2017041009A1 (en) * | 2015-09-02 | 2017-03-09 | Mckinney Krista | Single thickness blade with leading edge serrations on an axial fan |
CN111133201A (en) * | 2017-10-03 | 2020-05-08 | 三菱电机株式会社 | Propeller fan and axial flow blower |
CN111133201B (en) * | 2017-10-03 | 2021-10-08 | 三菱电机株式会社 | Propeller fan and axial flow blower |
WO2019136939A1 (en) * | 2018-01-13 | 2019-07-18 | 广东美的环境电器制造有限公司 | Axial fan blade, axial fan blade assembly, and axial fan duct assembly |
DE102020214653A1 (en) | 2020-11-20 | 2022-05-25 | Ziehl-Abegg Se | Blades of a fan impeller, impeller and fan |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8139 | Disposal/non-payment of the annual fee |