EP0627560B1 - Radialgebläse - Google Patents
Radialgebläse Download PDFInfo
- Publication number
- EP0627560B1 EP0627560B1 EP94107578A EP94107578A EP0627560B1 EP 0627560 B1 EP0627560 B1 EP 0627560B1 EP 94107578 A EP94107578 A EP 94107578A EP 94107578 A EP94107578 A EP 94107578A EP 0627560 B1 EP0627560 B1 EP 0627560B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radial fan
- fan according
- blade edge
- outer blade
- disk
- 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 - Lifetime
Links
- 230000001154 acute effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 2
- 241000826860 Trapezium Species 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 1
Images
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
- F04D29/30—Vanes
-
- 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
- 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
- F05D2240/304—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 trailing edge of a rotor blade
Definitions
- the invention relates to a radial fan consisting of a housing a spiral inner contour and a closed impeller, whose diameter is much larger than its flow exit width and which consists of a support plate, a cover plate and in between arranged backward curved blades, and the blades are tapered inside out as well as their length on the supporting disc is greater than on the cover disc.
- Such a radial fan is known (EP-A-410 271).
- the known Radial blower is for use in a device for conveying a gaseous medium provided which is a large Has flow resistance. That means the gaseous medium a relatively high back pressure of 400 to 450 Pascal has overcome and yet with an average volume flow of 7 to 10 1 / s should be delivered.
- blower If the known blower is now used for an application, where it works against very low back pressures (e.g. 80-100 Pascal) and delivers a high volume flow (e.g. 10 1 / s), it can happen that there is a noise - especially amplified by sound pressure peaks generated.
- very low back pressures e.g. 80-100 Pascal
- a high volume flow e.g. 10 1 / s
- a radial impeller is also known (DE-U-93 03 711), which consists of a Carrying disc, a cover plate and arranged between them Shovels exist.
- the Diameter about four times the flow exit width, and the Bucket width is constant.
- the efficiency and the Increase power density With the well-known radial impeller technical problem to be solved, the efficiency and the Increase power density.
- the publication in which this known The radial impeller has no information on whether it is in is arranged in a housing and what shape it may have could.
- the technical problem underlying the invention now exists in improving the known radial fan in such a way that the Subjectively perceived as very disturbing sound pressure peaks avoided without increasing the air noise (noise level) at the same time becomes.
- the impeller consists of the support disk 1, the cover plate 2 and the blades 3. It can, for example, from Be made of plastic.
- the embodiment of the blade edge shown in Fig. 2 has the shape an obtuse-angled triangle with a rounded tip.
- Triangle is not an isosceles triangle, because the the left half of the triangle is slightly narrower than the right half. That's why the angles are different, which the edges 4 and 5 with the Connection line 6 between the ends of support plate 1 and Cover plate 2 (a parallel to the axis of rotation of the impeller) lock in.
- the angle alpha has 43 degrees and the Angle beta 36 degrees.
- the rounded tip 7 has for example a radius of curvature of 2 mm.
- the embodiment of the blade edge according to FIG. 3 differs 2 in that the cover plate 2nd has a smaller diameter than the support disk 1. This is the edge 5 is somewhat longer than in FIG. 2.
- the embodiment of the blade edge according to FIG. 4 does not contain any straight areas as in previous embodiments, but them is an arched curve, which is asymmetrical than the left part 8 has a different radius of curvature than the right part 9 owns.
- the arched curve can also be symmetrical be, the radius of curvature is the same everywhere.
- the blade edge In the exemplary embodiments of the blade edge according to FIGS. 5 and 6 it consists of a straight, oblique line 10 or 11. At 6 has the support plate 1 larger diameter than the cover plate 2. In the embodiment 5 is the reverse.
- the outer blade edge is made of Trapezoidal, i.e. it consists of the straight line 12 parallel to Axis of rotation and the slope 13.
- the slope can also on the support plate 1 and the straight line 12 lie on the cover plate 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
- Fig. 1
- einen Längsschnitt durch ein Gebläserad mit einer gemäß der Erfindung ausgebildeten äußeren Schaufelkante,
- Fig. 2
- einen vergrößerten Ausschnitt aus dem Gebläserad gemäß Fig. 1 im Bereich der äußeren Schaufelkante,
- Fig. 3
- einen vergrößerten Ausschnitt entsprechend Fig. 2 mit einer anderen Ausführungsform der äußeren Schaufelkante,
- Fig. 4 bis Fig. 7
- vergrößerte Ausschnitte entsprechend Fig. 2 mit weiteren Ausführungsformen der äußeren Schaufelkante.
Claims (9)
- Radialgebläse, bestehend aus einem Gehäuse mit einer spiralförmigen Innenkontur und einem geschlossenen Gebläserad, dessen Durchmesser viel größer als seine Strömungsaustrittsbreite (c) ist und welches aus einer Tragscheibe (1), einer Deckscheibe (2) und dazwischen angeordneten rückwärts gekrümmten Schaufeln (3) besteht, und die Schaufeln (3) sich von innen nach außen verjüngend ausgebildet sind sowie ihre Länge an der Tragscheibe (1) größer als an der Deckscheibe (2) ist,
dadurch gekennzeichnet, daß wenigstens ein Teil der äußeren Schaufelkante mit einer Parallelen zur Drehachse einen spitzen Winkel einschließt. - Radialgebläse nach Anspruch 1,
dadurch gekennzeichnet, daß die äußere Schaufelkante als stumpfwinkliges Dreieck ausgebildet ist. - Radialgebläse nach Anspruch 1,
dadurch gekennzeichnet, daß die äußere Schaufelkante als Trapez ausgebildet ist. - Radialgebläse nach Anspruch 1,
dadurch gekennzeichnet, daß die äußere Schaufelkante als Rundung (8, 9) ausgebildet ist. - Radialgebläse nach Anspruch 1,
dadurch gekennzeichnet, daß die äußere Schaufelkante eine zwischen den Enden von Tragscheibe (1) und Deckscheibe (2) verlaufende schräge Linie (10, 11) ist. - Radialgebläse nach den Ansprüchen 1 und 2,
dadurch gekennzeichnet, daß die stumpfwinklige Spitze des Dreiecks als abgerundete Spitze (7) ausgebildet ist. - Radialgebläse nach den Ansprüchen 1 bis 6,
dadurch gekennzeichnet, daß die Tragscheibe (7) und die Deckscheibe (2) verschiedene Durchmesser aufweisen. - Radialgebläse nach Anspruch 4,
dadurch gekennzeichnet, daß die Rundung (8, 9) symmetrisch ausgebildet ist. - Radialgebläse nach Anspruch 4,
dadurch gekennzeichnet, daß die Rundung (8, 9) asymmetrisch ausgebildet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4318580 | 1993-06-04 | ||
DE4318580A DE4318580A1 (de) | 1993-06-04 | 1993-06-04 | Radialgebläse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0627560A1 EP0627560A1 (de) | 1994-12-07 |
EP0627560B1 true EP0627560B1 (de) | 1998-07-01 |
Family
ID=6489633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94107578A Expired - Lifetime EP0627560B1 (de) | 1993-06-04 | 1994-05-17 | Radialgebläse |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0627560B1 (de) |
DE (2) | DE4318580A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2014393558B2 (en) * | 2014-05-09 | 2017-09-07 | Mitsubishi Electric Corporation | Centrifugal blower and electric vacuum cleaner |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19918085A1 (de) * | 1999-04-21 | 2000-10-26 | Bsh Bosch Siemens Hausgeraete | Gebläse mit einem Spiralgehäuse |
ITAN20010008U1 (it) * | 2001-03-01 | 2002-09-01 | Giacalone Ignazio | Convogliatore aria per elettrodomestici cappe da cucina alimentato damotore elettrico |
DE10313054B4 (de) * | 2003-03-24 | 2012-10-04 | Motoren Ventilatoren Landshut Gmbh | Radialgebläse |
EP1940496B1 (de) | 2005-10-28 | 2016-02-03 | ResMed Motor Technologies Inc. | Ein- oder mehrstufiges gebläse und verschachtelte diffusor und/oder laufräder dafür |
EP2090788A1 (de) * | 2008-02-14 | 2009-08-19 | Napier Turbochargers Limited | Flügelrad und Turbolader |
DE102016113589A1 (de) * | 2016-07-22 | 2018-01-25 | Ebm-Papst Landshut Gmbh | Gebläserad |
DE102020131789A1 (de) * | 2019-12-09 | 2021-06-10 | Löwenstein Medical Technology S.A. | Laufrad mit reduzierter Massenträgheit für ein Atemtherapiegerät |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1341882A (en) * | 1915-09-07 | 1920-06-01 | Buffalo Forge Co | Centrifugal fan |
DE800238C (de) * | 1948-10-02 | 1950-10-17 | Maschf Augsburg Nuernberg Ag | Geblaeserad |
DE3137554A1 (de) * | 1981-09-22 | 1983-03-31 | Wilhelm Gebhardt Gmbh, 7112 Waldenburg | "radialventilator" |
DE3924281A1 (de) * | 1989-07-22 | 1991-01-31 | Standard Elektrik Lorenz Ag | Vorrichtung zum foerdern eines gasfoermigen mediums |
DE8909594U1 (de) * | 1989-08-10 | 1989-10-05 | Metronic Electronic GmbH, 7210 Rottweil | Gebläse mit einem Elektromotor |
DE9303711U1 (de) * | 1993-03-13 | 1993-05-13 | Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld | Radiallaufrad |
-
1993
- 1993-06-04 DE DE4318580A patent/DE4318580A1/de not_active Withdrawn
-
1994
- 1994-05-17 DE DE59406358T patent/DE59406358D1/de not_active Expired - Lifetime
- 1994-05-17 EP EP94107578A patent/EP0627560B1/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2014393558B2 (en) * | 2014-05-09 | 2017-09-07 | Mitsubishi Electric Corporation | Centrifugal blower and electric vacuum cleaner |
Also Published As
Publication number | Publication date |
---|---|
DE4318580A1 (de) | 1994-12-08 |
EP0627560A1 (de) | 1994-12-07 |
DE59406358D1 (de) | 1998-08-06 |
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