DE174855C - IMPELLER FOR FANS - Google Patents

IMPELLER FOR FANS

Info

Publication number
DE174855C
DE174855C DE1905174855D DE174855DA DE174855C DE 174855 C DE174855 C DE 174855C DE 1905174855 D DE1905174855 D DE 1905174855D DE 174855D A DE174855D A DE 174855DA DE 174855 C DE174855 C DE 174855C
Authority
DE
Germany
Prior art keywords
main
channel
blades
impeller
fans
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.)
Expired
Application number
DE1905174855D
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German (de)
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Individual
Original Assignee
Individual
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.)
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Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of DE174855C publication Critical patent/DE174855C/en
Expired legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/28Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

fywi 3ako/x\koAY\.la, fywi 3ako / x \ koAY \. la,

&vnaefiicA bee SoA'iwwvwna& vnaefiicA bee SoA'iwwvwna

Όύύ αΌύύ α

KAISERLICHESIMPERIAL

PATENTAMT,PATENT OFFICE,

Die- Hauptverlustquelle bei Ventilatoren bildet bekanntlich der Druckunterschied des Gases, welcher zwischen der \^order- und Rückseite jeder Schaufel als Folge der tangentialen Beschleunigung auftritt und unter anderem Anlaß zu Wirbelungen gibt.The main source of loss in fans is known to form the pressure difference of the gas, which between the \ ^ order- and Rear side of each blade occurs as a result of the tangential acceleration and gives rise to eddies, among other things.

Dieser Druckunterschied verringert sich, wenn man die Schaufelzahl vermehrt. Da man aber am Einlaufe praktisch nicht allzuviel Schaufeln unterbringen kann und der Hauptwert auf gleichförmige Strömung an der Auslaufseite zu legen ist, so hat man vielfach kurze Zwischenschaufeln nach Art der Fig. ι der beiliegenden Zeichnung an-This pressure difference decreases when you increase the number of blades. There but you can practically not accommodate too many shovels at the inlet and the The main emphasis is on uniform flow on the outlet side, so one has often short intermediate blades according to the type of Fig. ι the accompanying drawing.

gewendet. Man erzielt jedoch dadurch nur eine geringe Verbesserung, denn da sich nach Fig. ι bei der angedeuteten Umlaufrichtung im Hauptschaufelkanal α das Gas von größerer Dichte bei b befinden wird, so wird auch die größere Teilgasmenge durch den Zweigkanal c und die kleinere durch d gehen; der Zweck ist also nicht erreicht worden.turned. However, it is achieved only a slight improvement, because there will be located according to FIG ι in the indicated direction of rotation in the main vane duct α gas of greater density at b, as well as the greater part of gas is and go through the branch passage c smaller by d. so the purpose has not been achieved.

Bei dem Laufrade der vorliegenden Erfindung werden ebenfalls Zwischenschaufeln angewendet; diese unterteilen jedoch den Gasstrom derartig, daß durch jeden Zweigkanal eine ihm entsprechende Gasmenge hindurchgeht. Dies erreicht man z. B. nach Fig. 2 durch Verlegung des inneren Endes der Zwischenschaufel g nach der Schaufel h zu. Es ist also allgemein nach Fig. 2 das Verhältnis der Bogenmaße χ und y, welche den zugehörenden Kanalquerschnitten proportional sind, so zu wählen, daß die durch die Zweigkanäle f und e sekundlich strömenden Gasmengen sich wie die Bogenmaße m und η verhalten.Intermediate blades are also employed in the impeller of the present invention; however, these subdivide the gas flow in such a way that a corresponding amount of gas passes through each branch channel. This can be achieved e.g. B. according to Fig. 2 by relocating the inner end of the intermediate blade g to the blade h . In general, according to FIG. 2, the ratio of the radian dimensions χ and y, which are proportional to the associated channel cross- sections, is to be selected so that the gas quantities flowing secondarily through the branch channels f and e behave like the radian dimensions m and η .

In Fig. 2 ist m = η gewählt. Man kann also χ und y berechnen, wenn man die Änderung des Gaszustandes im Querschnitt des Hauptkanales an der Unterteilungsstelle kennt. In Fig. 3 ist dagegen χ =jy gewählt, woraus m und η zu bestimmen sind. Selbstverständlich können mehrfache und wiederholte Unterteilungen der beschriebenen Art statthaben. In Fig. 4 sind an einem Rade 4 Beispiele von Unterteilungen nach Art der Fig. 2 dargestellt und mit I bis IV bezeichnet.In Fig. 2, m = η is chosen. So you can calculate χ and y if you know the change in the gas state in the cross-section of the main channel at the subdivision point. In Fig. 3, however, χ = jy is chosen, from which m and η are to be determined. Of course, multiple and repeated subdivisions of the type described can take place. In Fig. 4 4 examples of subdivisions of the type of Fig. 2 are shown on a wheel and denoted by I to IV.

Die vorstehenden Ausführungen gelten nicht nur für radial auslaufende, sondern auch für beliebig gekrümmte Schaufeln.The above statements apply not only to radially tapering, but also for blades with any curvature.

Zur Ermittelung der Schaufelabstände für die vorstehend beschriebene Laufradkonstruktion sind nicht nur die Dichten, sondern auch die Geschwindigkeitsunterschiede in dem in Frage kommenden Querschnitte des Gasstromes zu berücksichtigen.To determine the blade spacing for the impeller design described above are not only the densities but also the speed differences in that possible cross-sections of the gas flow to be taken into account.

Claims (1)

Patent-Anspruch:Patent claim: Laufrad für Ventilatoren, welches zwischen seinen stetig von innen nach außen laufenden Hauptschaufeln kürzere Zwischenschaufeln besitzt, dadurch gekennzeichnet, daß diese Zwischenschaufeln nicht symmetrisch zwischen, die Hauptschaufeln eingesetzt, sondern mit ihrem inneren Ende nach der treibenden Haupt-Impeller for fans, which between its steadily from the inside to the outside running main blades has shorter intermediate blades, characterized in that that these intermediate blades are not symmetrical between the main blades used, but with its inner end after the main driving force schaufel des betreffenden Kanales hin — oder mit ihrem äußeren Ende von dieser abgerückt — oder beides zugleich sind, zu dem Zwecke, möglichst eine derartige Unterteilung des nach außen fließenden Gasstromes zu erhalten, daß die durch einen Zweigkanal in der Zeiteinheit fließende Gasmenge sich zu der ganzen, durch den Hauptkanal fließenden Menge verhält wie der Austrittsquerschnitt des iö Zweigkanales zum Gesamtaustrittsquerschnitt des Hauptkanales.shovel of the channel in question - or with its outer end of this withdrawn - or both are at the same time, for the purpose, if possible such a thing Subdivision of the outward flowing gas flow to obtain that through a branch channel in the unit of time The amount of gas flowing is related to the whole amount flowing through the main channel like the outlet cross-section of the iö Branch channel to the total outlet cross-section of the main channel. Hierzu ι Blatt Zeichnungen.For this purpose ι sheet of drawings.
DE1905174855D 1905-08-19 1905-08-19 IMPELLER FOR FANS Expired DE174855C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE174855T 1905-08-19

Publications (1)

Publication Number Publication Date
DE174855C true DE174855C (en) 1906-10-01

Family

ID=87158565

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1905174855D Expired DE174855C (en) 1905-08-19 1905-08-19 IMPELLER FOR FANS

Country Status (1)

Country Link
DE (1) DE174855C (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550585A1 (en) * 1983-08-09 1985-02-15 Foueillassar Jean Marie Means for smoothing the speed of a fluid at the outlet of a centrifugal wheel
EP0205001A1 (en) * 1985-05-24 1986-12-17 A. S. Kongsberg Väpenfabrikk Splitter blade arrangement for centrifugal compressors
DE8909839U1 (en) * 1989-08-17 1991-01-31 Siemens AG, 8000 München Impeller for a liquid ring compressor
EP0439267A1 (en) * 1990-01-26 1991-07-31 Schwitzer U.S. Inc. Compressor impeller with displaced splitter blades
EP0516073A1 (en) * 1991-05-29 1992-12-02 Alcatel SEL Aktiengesellschaft Apparatus for transporting a gaseous medium
FR2811156A1 (en) * 2000-06-30 2002-01-04 Valeo Equip Electr Moteur Fan for a rotating electrical machine, particularly an alternator fitted to a motor vehicle, uses supplementary blades between outer regions of principal blades to provide better air flow
WO2002090776A2 (en) * 2001-05-09 2002-11-14 Mtu Friedrichshafen Gmbh Rotor disk
WO2008125384A1 (en) * 2007-04-16 2008-10-23 Continental Automotive Gmbh Exhaust gas turbocharger
DE102009007843A1 (en) * 2009-02-06 2010-08-12 Bosch Mahle Turbo Systems Gmbh & Co. Kg Compressor wheel for exhaust gas turbocharger, has split blades arranged between two consecutive complete blades, where blade periods comprise four blades such as one complete blade and three split blades
CN107448415A (en) * 2017-08-23 2017-12-08 联想(北京)有限公司 A kind of electronic equipment and its radiator fan
CN109707647A (en) * 2017-10-26 2019-05-03 台达电子工业股份有限公司 Fan
EP3517679A4 (en) * 2016-09-26 2019-07-31 Qingdao Haier Washing Machine Co., Ltd. Positive-negative-rotation fan for clothes dryer, and clothes dryer

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550585A1 (en) * 1983-08-09 1985-02-15 Foueillassar Jean Marie Means for smoothing the speed of a fluid at the outlet of a centrifugal wheel
EP0205001A1 (en) * 1985-05-24 1986-12-17 A. S. Kongsberg Väpenfabrikk Splitter blade arrangement for centrifugal compressors
DE8909839U1 (en) * 1989-08-17 1991-01-31 Siemens AG, 8000 München Impeller for a liquid ring compressor
EP0439267A1 (en) * 1990-01-26 1991-07-31 Schwitzer U.S. Inc. Compressor impeller with displaced splitter blades
EP0516073A1 (en) * 1991-05-29 1992-12-02 Alcatel SEL Aktiengesellschaft Apparatus for transporting a gaseous medium
FR2811156A1 (en) * 2000-06-30 2002-01-04 Valeo Equip Electr Moteur Fan for a rotating electrical machine, particularly an alternator fitted to a motor vehicle, uses supplementary blades between outer regions of principal blades to provide better air flow
WO2002090776A3 (en) * 2001-05-09 2003-02-27 Mtu Friedrichshafen Gmbh Rotor disk
DE10122516A1 (en) * 2001-05-09 2002-11-28 Mtu Friedrichshafen Gmbh Wheel
WO2002090776A2 (en) * 2001-05-09 2002-11-14 Mtu Friedrichshafen Gmbh Rotor disk
DE10122516B4 (en) * 2001-05-09 2006-10-19 Mtu Friedrichshafen Gmbh Wheel
WO2008125384A1 (en) * 2007-04-16 2008-10-23 Continental Automotive Gmbh Exhaust gas turbocharger
US8512000B2 (en) 2007-04-16 2013-08-20 Continental Automotive Gmbh Exhaust gas turbocharger
DE102009007843A1 (en) * 2009-02-06 2010-08-12 Bosch Mahle Turbo Systems Gmbh & Co. Kg Compressor wheel for exhaust gas turbocharger, has split blades arranged between two consecutive complete blades, where blade periods comprise four blades such as one complete blade and three split blades
EP3517679A4 (en) * 2016-09-26 2019-07-31 Qingdao Haier Washing Machine Co., Ltd. Positive-negative-rotation fan for clothes dryer, and clothes dryer
CN107448415A (en) * 2017-08-23 2017-12-08 联想(北京)有限公司 A kind of electronic equipment and its radiator fan
CN109707647A (en) * 2017-10-26 2019-05-03 台达电子工业股份有限公司 Fan
CN109707647B (en) * 2017-10-26 2021-09-03 台达电子工业股份有限公司 Fan with cooling device
US11365747B2 (en) 2017-10-26 2022-06-21 Delta Electronics, Inc. Fan

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