EP0616131B1 - Roue radiale - Google Patents
Roue radiale Download PDFInfo
- Publication number
- EP0616131B1 EP0616131B1 EP94100758A EP94100758A EP0616131B1 EP 0616131 B1 EP0616131 B1 EP 0616131B1 EP 94100758 A EP94100758 A EP 94100758A EP 94100758 A EP94100758 A EP 94100758A EP 0616131 B1 EP0616131 B1 EP 0616131B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- disc
- blade ring
- hub
- cover
- blades
- 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
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
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
Definitions
- the invention relates to a radial impeller according to the preamble of claim 1.
- DE 29 40 773 A1 shows options for optimally designing the contour of the cover plate and various dimensions and angles with a view to a high power density and good efficiency.
- the invention is based on impellers which are described in this document. With these impellers, the blades can be designed as profiled or non-profiled blades. In the latter case, they can be curved in the shape of a circular arc or parabolic, or they can also be designed as straight blades. The outer edges of the blades run parallel to the axis of rotation.
- the document also shows an embodiment in which the outer diameter of the blade ring increases from the hub disk to the cover disk.
- the increase is between about 10.5 and 35%.
- the edge of the hub disk carrying the blades is bent in the direction away from the cover disk by an angle of 10 to 25 degrees.
- the tangent to the cover disk at its outer edge encloses an angle of 20 to 30 degrees with a radial line, that is, a line directed at right angles to the impeller axis. With this configuration, the emerging air flow is acute to the axis directed.
- Such impellers are usually referred to as diagonal or semi-axial wheels.
- a diagonal wheel is known from the magazine HLH Volume 40 (1989) No. 8 - August, pages 426 to 428, in which the outer diameter of the blade ring on the cover disk is approximately 29% larger than on the hub disk.
- the blades have a curvature and a twist.
- EP-B1-0 112 932 also deals with the problem of increasing the power density and the efficiency of radial impellers. It describes an impeller whose blades are deformed by twisting or shearing, the inside diameter of the blade ring decreasing from the cover disk to the hub disk.
- the outside diameter is constant in some embodiments. In one embodiment, it varies such that it assumes its minimum value on the cover disk and its maximum value on the hub disk.
- the invention is not concerned with impellers made by casting. It is not concerned with complicatedly shaped impellers that can only be economically produced in large series due to the high tooling costs. Rather, it deals with the impellers specified in the preamble of claim 1, which can be produced in single or small series production with little effort on special tools.
- the invention has for its object to further improve a radial impeller according to the preamble of claim 1, so that the efficiency and the power density are increased.
- the impeller shown in Fig. 1 consists of a flat hub disc 1, an annular cover plate 2 and a plurality of blades 3, which form a blade ring.
- the cover plate 2 is shaped like a trumpet in a known manner. 1 has approximately the shape of a circular arc of 90 degrees, so that the tangent on the inner edge runs approximately parallel to the axis of rotation and radially on the outer edge, i.e. encloses an angle of 90 degrees with the axis of rotation.
- the blades 3 are flat or cylindrically curved sheets or also wing-like profiles. They are welded between the hub disc 1 and cover disc 2, e.g. by spot welding.
- the inner edges of the blades 3 consist of a rectilinear section parallel to the axis of rotation, which extends from the hub disk 1 to an intermediate plane 4, and an adjoining, slightly outwardly curved section which extends from the intermediate plane 4 to the cover disk 2 .
- the outer edges are flush with both the edge of the hub disc 1 and the outer edge of the cover disc 2.
- the outer diameter of the cover disk 2 is approximately 3% larger than the diameter of the hub disk 1. Therefore, the outer diameter of the blade ring increases from the hub disk 1 to the cover disk 2.
- the outer edge of the blade 3 consists of two rectilinear sections.
- the first section 5 extends from the hub disc 1 in the axial direction over a height a to the intermediate plane 4 parallel to the hub disc 1.
- the second section 6 extends between the intermediate level 4 and the cover plate 2 over a height b. It is parallel to the axis of rotation.
- the ratio a: b, in which the intermediate plane 4 divides the distance between the hub disk 1 and the cover disk 2, is approximately 7: 3.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Supercharger (AREA)
Claims (4)
- Roue à aubes radiale, comprenant une plaque de moyeu (1),une plaque de recouvrement (2) annulaire, façonnée à la manière d'une trompette, etune couronne d'aubes, constituée de plusieurs aubes (3) planes ou recourbées de façon cylindrique, qui sont fixées à la plaque de moyeu (1) et à la plaque de recouvrement (2) par des liaisons simples, telles que des liaisons par soudage, rivetage ou enfichage,caractérisée en ce que le diamètre externe de la couronne d'aubes à la plaque de recouvrement (2) est de 1 à 6 % plus grand qu'à la plaque de moyeu (1).
- Roue à aubes radiale suivant la revendication 1, caractérisée en ce que le diamètre externe de la couronne d'aubes entre la plaque de moyeu (1) et un plan intermédiaire (4) parallèle à la plaque de moyeu augmente constamment et est constant entre le plan intermédiaire et la plaque de recouvrement (2), le plan intermédiaire (4) subdivisant la distance entre la plaque de moyeu (1) et la plaque de recouvrement (2) dans un rapport d'au moins 7/3.
- Roue à aubes radiale suivant l'une des revendications 1 et 2, caractérisée en ce que la plaque de moyeu (1) est plane.
- Roue à aubes radiale suivant l'une des revendications 1 à 3, caractérisée en ce que la tangente à la plaque de recouvrement (2) s'étend radialement au bord extérieur de celle-ci.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9303711U | 1993-03-13 | ||
DE9303711U DE9303711U1 (de) | 1993-03-13 | 1993-03-13 | Radiallaufrad |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0616131A1 EP0616131A1 (fr) | 1994-09-21 |
EP0616131B1 true EP0616131B1 (fr) | 1996-11-20 |
Family
ID=6890598
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94100758A Expired - Lifetime EP0616131B1 (fr) | 1993-03-13 | 1994-01-20 | Roue radiale |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0616131B1 (fr) |
AT (1) | ATE145451T1 (fr) |
DE (2) | DE9303711U1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4318580A1 (de) * | 1993-06-04 | 1994-12-08 | Sel Alcatel Ag | Radialgebläse |
FI122563B (fi) | 2005-02-21 | 2012-03-30 | Flaekt Woods Ab | Radiaalisiipipyörä |
DE102015122132A1 (de) * | 2015-12-17 | 2017-06-22 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Kantenberandung eines Rotationselements und Gebläserad |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR397702A (fr) * | 1908-05-28 | 1909-05-15 | James Keith | Perfectionnements aux ventilateurs rotatifs |
GB191321353A (en) * | 1913-09-29 | 1914-03-19 | Ralph Hancock | Improvements in Centrifugal Fans. |
US1341882A (en) * | 1915-09-07 | 1920-06-01 | Buffalo Forge Co | Centrifugal fan |
GB139717A (en) * | 1919-07-21 | 1920-03-11 | William Patchett Denton | Improvements in and connected with air blowers |
DE1063323B (de) * | 1957-06-29 | 1959-08-13 | Willi Keil | Zentrifugalgeblaese oder -pumpe |
DE1046247B (de) * | 1957-12-14 | 1958-12-11 | Winkelstraeter G M B H Geb | Laufrad von Radialgeblaesen und Radialventilatoren |
US3179329A (en) * | 1961-08-16 | 1965-04-20 | Ruth D Mayne | Turbine type blower wheel |
US3257071A (en) * | 1964-06-26 | 1966-06-21 | Rotron Mfg Co | Impeller assembly |
DE2437001B2 (de) * | 1974-08-01 | 1978-01-26 | Wilhelm Gebhardt GmbH, 7112 Waidenburg | Radialgeblaese mit rueckwaerts gekruemmten profilierten schaufeln |
DE2940773C2 (de) * | 1979-10-08 | 1986-08-14 | Punker GmbH, 2330 Eckernförde | Hochleistungs-Radialventilator |
DE3264089D1 (en) * | 1982-12-29 | 1985-07-11 | Gebhardt Gmbh Wilhelm | Radial ventilator with backwards-curved profiled blades |
DE3520218A1 (de) * | 1984-06-08 | 1985-12-12 | Hitachi, Ltd., Tokio/Tokyo | Laufrad fuer ein radialgeblaese |
-
1993
- 1993-03-13 DE DE9303711U patent/DE9303711U1/de not_active Expired - Lifetime
-
1994
- 1994-01-20 AT AT94100758T patent/ATE145451T1/de not_active IP Right Cessation
- 1994-01-20 EP EP94100758A patent/EP0616131B1/fr not_active Expired - Lifetime
- 1994-01-20 DE DE59401057T patent/DE59401057D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE9303711U1 (de) | 1993-05-13 |
EP0616131A1 (fr) | 1994-09-21 |
ATE145451T1 (de) | 1996-12-15 |
DE59401057D1 (de) | 1997-01-02 |
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