DE2633781B2 - Centrifugal fan with high pressure factor - Google Patents
Centrifugal fan with high pressure factorInfo
- Publication number
- DE2633781B2 DE2633781B2 DE2633781A DE2633781A DE2633781B2 DE 2633781 B2 DE2633781 B2 DE 2633781B2 DE 2633781 A DE2633781 A DE 2633781A DE 2633781 A DE2633781 A DE 2633781A DE 2633781 B2 DE2633781 B2 DE 2633781B2
- Authority
- DE
- Germany
- Prior art keywords
- high pressure
- impeller
- web
- housing
- radial fan
- 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
- 230000001154 acute effect Effects 0.000 claims description 2
- 230000009747 swallowing Effects 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
-
- 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
- F05D2250/50—Inlet or outlet
- F05D2250/51—Inlet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Die Erfindung bezieht sich auf Radialgebläse, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to radial fans according to the preamble of claim 1.
Der Erfindung liegt die Aufgabe zugrunde, den bei Radialgebläsen im Bereich niedriger Volumenströme teilweise auftretenden Sattel in der Druck-Volumen-Kennlinie durch Drucksteigerung in diesem unstabilen Bereich zu verhindern, ohne dabei die Geräuschbildung zu erhöhen.The invention is based on the problem of radial blowers in the area of low volume flows partially occurring saddle in the pressure-volume characteristic curve due to pressure increase in this unstable Area without increasing the noise.
Von Forschung und Industrie werden seit Jahren Versuche durchgeführt, um die Druckziffer von Radialgebläsen zu erhöhen und die Druck-Volumen-Kennlinie zu stabilisieren. Dabei ist bekannt, durch Maßnahmen an der Ansaugöffnung (z. B. Ansaugführur.g gemäß DE-OS 20 27 936 oder Schleudergebläse gemäß DE-OS 14 28 057) oder durch geeignete Ausbildung der Gehäusezunge (Radialventilator gemäß DE-OS 18 07 385) entsprechende Druckerhöhungen zu erreichen. Mit den bisher bekannten Ausführungen lassen sich die geforderten hohen Druckziffern teilweise nur unter Inkaufnahme von starker GeräuschbildungFor years, research and industry have carried out attempts to reduce the pressure figure from Increase radial fans and stabilize the pressure-volume characteristic. It is known by Measures at the suction opening (e.g. suction guide g according to DE-OS 20 27 936 or centrifugal fan according to DE-OS 14 28 057) or by suitable Training of the housing tongue (radial fan according to DE-OS 18 07 385) to corresponding pressure increases reach. With the designs known up to now, the required high pressure figures can be partially met only with the acceptance of a lot of noise
ίο erreichen; teilweise können Luft-Leitbleche wegen der geometrischen Bauform von Gebläsen nicht verwendet werden.ίο reach; partly because of the air baffles geometric design of blowers cannot be used.
Dem Antrag liegt deshalb die Aufgabe zugrunde, ein Radialgebläse zu schaffen, mit dem hohe Druckziffern ohne starke Geräuschbildung erzielt werden.The application is therefore based on the task of creating a radial fan with high pressure numbers can be achieved without a lot of noise.
Diese Aufgabe wird durch die Merkmale des kennzeichnenden Tei's des Anspruchs 1 gelöst.This object is achieved by the features of the characterizing part of claim 1.
Dieser Steg beginnt bei einer vorteilhaften Ausbildung der Erfindung in Drehrichtung des Laufrades gemessen zwischen 0° und 120° nach der Gehäusezunge und erstreckt sich über einen Winkel von 10° bis 120°; die axiale Erstreckung beträgt 5% bis 50% der Laufrad-Bauhöhe. Die der Luftströmung zugewandte Fläche des Steges verläuft rechtwinklig oder annähernd rechtwinklig zur Umfangsrichtung des Laufrades; die gegenüberliegende Fläche läuft unter einem spitzen Winkel in die herkömmliche Spiralgehäusekontur aus.In an advantageous embodiment of the invention, this web begins in the direction of rotation of the impeller measured between 0 ° and 120 ° after the housing tongue and extends over an angle of 10 ° to 120 °; the axial extent is 5% to 50% of the overall height of the impeller. The one facing the air flow The surface of the web runs at right angles or approximately at right angles to the circumferential direction of the impeller; the The opposite surface ends at an acute angle in the conventional spiral casing contour.
Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß höhere Druckziffern als mit bekannten Gebläsen erreicht werden und die Druck-Volumen-Kennlinie im Bereich niedriger Volumenströme stabilisiert und dabei der bei Radialgebläsen teilweise auftretende Sattel vermieden wird. Ein weiterer Vorteil von erfindungsgemäßen Radialgebläsen ist, daß diese Verbesserungen der Charakteristik erreicht werden, ohne daß die Schluckziffer absinkt oder eine übermäßige Geräuschbildung eintritt.The advantages achieved by the invention are in particular that higher pressure digits than with known blowers can be achieved and the pressure-volume characteristic in the range of low volume flows stabilized while avoiding the saddle that sometimes occurs with radial fans. A Another advantage of radial fans according to the invention is that they improve the characteristics can be achieved without the swallowing rate falling or excessive noise occurring.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im Folgenden näher beschriebenAn embodiment of the invention is shown in the drawing and will be described in more detail below described
Fig. 1 ZL-igt die Ansicht,Fig. 1 ZL-igt the view,
F i g. 2 den Schnitt durch ein Radialgebläse mit hoher Druckziffer, ausgerüstet mit einer bekannten Ansaug-Luftführung. F i g. 2 shows the section through a radial fan with a high pressure factor, equipped with a known suction air duct.
F i g. 3 zeigt den Schnitt durch ein Radialgebläse mit hoher Druckziffer, ausgerüstet mit herkömmlicher Einlaufdüse.F i g. Figure 3 shows the section through a high pressure centrifugal fan equipped with a conventional one Inlet nozzle.
In den Abbildungen bedeuten 1 das Gehäuse, 2 die Gehäusezunge, 3 die Ansaug-Luftführung bzw. die Einlaufdüse, 4 das Ventilatorrad und 5 dessen Bauhöhe sowie 6 den erfindungsgemäßen Steg.In the figures, 1 denotes the housing, 2 the housing tongue, 3 the intake air duct or the Inlet nozzle, 4 the fan wheel and 5 its overall height and 6 the web according to the invention.
Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.
Claims (6)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2633781A DE2633781C3 (en) | 1976-07-28 | 1976-07-28 | Radial fan for high pressure ratio |
| CH142777A CH622066A5 (en) | 1976-07-28 | 1977-02-05 | Radial blower having a high coefficient of pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2633781A DE2633781C3 (en) | 1976-07-28 | 1976-07-28 | Radial fan for high pressure ratio |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2633781A1 DE2633781A1 (en) | 1978-02-02 |
| DE2633781B2 true DE2633781B2 (en) | 1979-10-18 |
| DE2633781C3 DE2633781C3 (en) | 1982-12-30 |
Family
ID=5984081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2633781A Expired DE2633781C3 (en) | 1976-07-28 | 1976-07-28 | Radial fan for high pressure ratio |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH622066A5 (en) |
| DE (1) | DE2633781C3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1983002646A1 (en) * | 1982-01-21 | 1983-08-04 | Knut Olof Lennart Wallman | An arrangement for radial fans |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3629132A1 (en) * | 1986-08-27 | 1988-03-10 | Buderus Heiztechnik Gmbh | Blower for oil and gas blower burners |
| US5570996A (en) * | 1994-06-27 | 1996-11-05 | American Standard Inc. | Compact centrifugal fan |
| US5551836A (en) * | 1995-01-27 | 1996-09-03 | Revcor, Inc. | High pressure combustion blower assembly |
| TWI464322B (en) * | 2010-12-14 | 2014-12-11 | Delta Electronics Inc | Centrifugal fan |
| US8888450B2 (en) * | 2011-09-23 | 2014-11-18 | Brett W. Degner | Sculpted fan housing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1898023U (en) * | 1963-11-19 | 1964-08-06 | Billners Handelsaktiebolag | SPIN FAN. |
| DE2027936A1 (en) * | 1970-06-06 | 1971-12-16 | Dr. Werner Rohrs KG, 8972 Sonthofen | Suction guide for radial fans |
-
1976
- 1976-07-28 DE DE2633781A patent/DE2633781C3/en not_active Expired
-
1977
- 1977-02-05 CH CH142777A patent/CH622066A5/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1983002646A1 (en) * | 1982-01-21 | 1983-08-04 | Knut Olof Lennart Wallman | An arrangement for radial fans |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2633781C3 (en) | 1982-12-30 |
| CH622066A5 (en) | 1981-03-13 |
| DE2633781A1 (en) | 1978-02-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OD | Request for examination | ||
| 8281 | Inventor (new situation) |
Free format text: GAIL, ANDREAS, ING.(GRAD.), 8970 IMMENSTADT, DE |
|
| C3 | Grant after two publication steps (3rd publication) |