EP0303924B1 - Fan rotor manufactured from a thin metal disc, and its production method - Google Patents

Fan rotor manufactured from a thin metal disc, and its production method Download PDF

Info

Publication number
EP0303924B1
EP0303924B1 EP88112859A EP88112859A EP0303924B1 EP 0303924 B1 EP0303924 B1 EP 0303924B1 EP 88112859 A EP88112859 A EP 88112859A EP 88112859 A EP88112859 A EP 88112859A EP 0303924 B1 EP0303924 B1 EP 0303924B1
Authority
EP
European Patent Office
Prior art keywords
blades
impeller
fan
center portion
sawtooth
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
Application number
EP88112859A
Other languages
German (de)
French (fr)
Other versions
EP0303924A3 (en
EP0303924A2 (en
Inventor
Reinhold Hopfensperger
Werner Eichhorn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent Deutschland AG
Original Assignee
Alcatel SEL AG
Standard Elektrik Lorenz AG
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.)
Filing date
Publication date
Application filed by Alcatel SEL AG, Standard Elektrik Lorenz AG filed Critical Alcatel SEL AG
Priority to AT88112859T priority Critical patent/ATE68852T1/en
Publication of EP0303924A2 publication Critical patent/EP0303924A2/en
Publication of EP0303924A3 publication Critical patent/EP0303924A3/en
Application granted granted Critical
Publication of EP0303924B1 publication Critical patent/EP0303924B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/78—Making other particular articles propeller blades; turbine blades
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y10S416/03—Sheet metal

Definitions

  • the invention relates to a fan wheel made from a sheet metal disk with a plurality of fan blades, which are produced by cuts in the sheet metal disk and which are bent out essentially at right angles from the plane of the sheet metal disk.
  • Such a fan wheel is known (DE-A-15 03 633).
  • the known fan wheel is made from an approximately circular sheet metal disk in such a way that it is cut and the fan blades created in this way are produced by bending out by 90 degrees to one side or the other of the sheet metal disk plane.
  • the known fan impeller requires a higher air output, it is necessary because of its poor fluidic properties either to operate the fan impeller at high speeds or to increase the diameter of the fan impeller.
  • Another fan wheel is known (US-A-2,011,298) which has a circular flat center.
  • the fan blades connected to this center are formed in two parts. They consist of disks that are rounded on one side and intertwined, which are connected to the wings that are bent up at right angles from the plane of the center.
  • a pump is also known (US Pat. No. 2,117,011), the pump wheel of which has a circular, flat center from which radially strip-shaped blades extend. These blades are rotated ninety degrees around their longitudinal axis, being crossed near the center. In this known pump wheel, only a very small area of the sheet metal disk is used for the pumping action.
  • the invention is therefore based on the object of improving the fan wheel in such a way that the blades have an effective blade area which is as large as possible with the same fan wheel diameter, so that the fan wheel has better efficiency with low noise.
  • the advantage of the inexpensive method of production by deforming a sheet metal plate should be retained.
  • This object is achieved in that with the edges of sawtooth-shaped projections of a circular saw blade-shaped, flat center blade roots bent out of the plane of the center are connected, which continue in fan blades extending in the radial direction, the fan blades being each wider than the projections .
  • a radial fan equipped with the fan wheel according to the invention has the advantage that, in order to generate the same air flow compared to the known fan wheel, a significantly lower motor output is required. This is due on the one hand to the larger effective blade area and on the other hand to the more aerodynamically advantageous design of the fan wheel according to the invention. This also results in less noise from the fan. With the same air power output, the power consumption of the fan motor equipped with the fan wheel according to the invention is reduced by more than 50% compared to the fan with a known fan wheel.
  • the fan wheel 1 has a flat center 4, which has the shape of a circular saw blade.
  • the center 4 consists namely of an essentially circular blank, which is circumferentially covered with a plurality of sawtooth-shaped projections 3.
  • the blade feet 5 cannot be seen in FIGS. 1 and 2
  • the fan blades 2 which correspond to the plane of the center include about a right angle.
  • the two embodiments of the fan wheel according to FIGS. 1 and 2 differ in that, in the embodiment according to FIG. 1, the blade feet 5 and thus the fan blades 2 are connected to the outer edge 6 of the sawtooth-shaped projections 3, while in the embodiment 2 with the front edge 7 of the sawtooth-shaped projections 3 in connection.
  • the development of the fan wheel 1 has a plurality of fan blades 2, which run radially outward from the center 4.
  • the fan blades 2 are separated by an approximately S-shaped parting line 8, which was created during punching.
  • the fan blades 2 are only connected to the center 4 of the fan wheel via the blade root 5.
  • the fan wheel is produced in the following way: After the unwinding 1 has been punched out of a flat sheet, the fan blades are bent, for example in a circular manner towards the viewer (in the position of the unrolling shown in FIG. 3). Subsequently, the fan blades 2 are bent through 90 angular degrees on the dashed line 9 (also towards the viewer). After the center 4 has been provided with a hub 10, a fan wheel has arisen, as can be seen from FIG. 2.
  • the fan wheel according to the invention can be optimally produced in terms of flow technology in a simple manner for every application.
  • Another advantage of the fan wheel according to the invention is the considerably higher temperature resistance of the steel sheet generally used in comparison with the usual aluminum die-cast wheel.

Landscapes

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

Abstract

It is proposed to solve the problem of designing a fan rotor manufactured from a thin metal disc in such a way that it can be manufactured cost-effectively and at the same time produce a greater air output whilst causing less noise. This is achieved by a special shape of the fan blades. <IMAGE>

Description

Die Erfindung betrifft ein, aus einer Metallblechscheibe hergestelltes Lüfterrad mit einer Mehrzahl von Lüfterschaufeln, welche durch Schnitte in der Blechscheibe erzeugt und welche im wesentlichen im rechten Winkel aus der Ebene der Blechscheibe herausgebogen sind.The invention relates to a fan wheel made from a sheet metal disk with a plurality of fan blades, which are produced by cuts in the sheet metal disk and which are bent out essentially at right angles from the plane of the sheet metal disk.

Ein solches Lüfterrad ist bekannt (DE-A-15 03 633). Das bekannte Lüfterrad wird aus einer in etwa kreisförmigen Blechscheibe in der Weise hergestellt, daß diese eingeschnitten wird und die derart geschaffenen Lüfterschaufeln durch Herausbiegen um neunzig Winkelgrade nach der einen oder anderen Seite aus der Blechscheibenenbene erzeugt werden.Such a fan wheel is known (DE-A-15 03 633). The known fan wheel is made from an approximately circular sheet metal disk in such a way that it is cut and the fan blades created in this way are produced by bending out by 90 degrees to one side or the other of the sheet metal disk plane.

Die vorstehend bezeichnete Vorgehensweise gestattet es zwar, Lüferräder auf kostengünstige Weise herzustellen. Diese bekannten Lüfterräder weisen jedoch zwei erhebliche Mängel auf. Der eine Mangel besteht darin, daß auf die vorstehend beschriebene Weise nur gerade, auf dem Lüfterrad radial nach außen verlaufende Schaufeln erzeugt werden können. Wenn die Schaufeln nur einen leicht gekrümmten Verlauf aufweisen sollen, dann ist bereits ein größerer Aufwand an Werkzeug und Werkstoff (z.B. besondere Tiefzieheigenschaften) erforderlich. Bei dieser Herstellungsweise ist nur die Herstellung von leicht gekrümmten Schaufeln möglich.The procedure described above allows fan wheels to be manufactured in a cost-effective manner. However, these known fan wheels have two significant shortcomings. One deficiency is that in the manner described above, only straight blades running radially outward on the fan wheel can be produced. If the blades should only have a slightly curved course, then a greater amount of tool and material (e.g. special deep-drawing properties) is required. With this production method, only the production of slightly curved blades is possible.

Da bei dem bekannten Lüfterrad die Lüfterschaufeln aus der Fläche des Lüfterrades herausgebogen werden, steht für die wirksame Fläche der Lüfterschaufeln nur eine begrenzte Fläche der Blechscheibe zur Verfügung, weil bei dem für das Biegen der Lüfterschaufeln erforderlichen Abkanten eine bestimmte Fläche benötigt wird, an welcher die Blechscheibe festgehalten wird.Since in the known fan wheel the fan blades are bent out of the surface of the fan wheel, there is only a limited area of the sheet metal available for the effective area of the fan blades, because a certain area is required for bending the fan blades, on which the Sheet metal disc is held.

Wird von dem bekannten Lüfterrad eine größere Luftleistung gefordert, ist es wegen seiner schlechten strömungstechnischen Eigenschaften erforderlich, das Lüfterrad entweder mit hohen Drehzahlen zu betreiben oder den Durchmesser des Lüfterrades zu vergrößern.If the known fan impeller requires a higher air output, it is necessary because of its poor fluidic properties either to operate the fan impeller at high speeds or to increase the diameter of the fan impeller.

Beide Maßnahmen erfordern eine wesentlich höhere Motor-Antriebsleistung. Naturgemäß sind sie ebenso mit einer erheblich größeren Geräuschentwicklung verbunden. Da derartige Lüfter überwiegend in Elektroherden als Umwälzgebläse betrieben werden, befindet sich der Motor wegen der hohen Umgebungstemperatur bereits an der Leistungsgrenze. Ein leistungsstärkerer Motor verteuert außerdem die gesamte Lüftereinheit.Both measures require a significantly higher motor drive power. Naturally, they are also associated with a considerably greater noise development. Since such fans are predominantly operated in electric cookers as circulation fans, the motor is already at the performance limit due to the high ambient temperature. A more powerful motor also makes the entire fan unit more expensive.

Es ist ein anderes Lüfterrad bekannt (US-A-2,011,298), welches ein kreisförmiges ebenes Zentrum aufweist. Die mit diesem Zentrum verbundenen Lüfterschaufeln sind zweiteilig ausgebildet. Sie bestehen aus den an einer Seite abgerundeten und in sich verschränkten Scheiben, welche mit den im rechten Winkel aus der Ebene des Zentrums hochgebogenen Flügeln verbunden sind.Another fan wheel is known (US-A-2,011,298) which has a circular flat center. The fan blades connected to this center are formed in two parts. They consist of disks that are rounded on one side and intertwined, which are connected to the wings that are bent up at right angles from the plane of the center.

Bei diesem bekannten Lüfterrad steht ebenfalls nur ein geringer Teil der Blechscheibe für die Erzeugung der Luftströmung zur Verfügung und eine verhältnismäßig große Fläche der Blechscheibe wird für die Befestigung der Flügel benutzt. Außerdem ist die Herstellung der, der Befestigung dienenden verschränkten Scheiben aufwendig.In this known fan wheel, only a small part of the sheet metal disc is also available for generating the air flow and a relatively large area of the sheet metal disc is used for fastening the blades. In addition, the manufacture of the interlocking disks used for fastening is complex.

Es ist weiterhin eine Pumpe bekannt (US-A-2,117,011), deren Pumpenrad ein kreisförmiges ebenes Zentrum besitzt, von dem strahlenförmig streifenförmige Schaufeln ausgehen. Diese Schaufeln sind um neunzig Winkelgrade um ihre Längsachse verdreht, wobei sie nahe dem Zentrum verschränkt sind. Bei diesem bekannten Pumpenrad ist ebenfalls nur eine sehr geringe Teilfläche der Blechscheibe für die Pumpwirkung genutzt.A pump is also known (US Pat. No. 2,117,011), the pump wheel of which has a circular, flat center from which radially strip-shaped blades extend. These blades are rotated ninety degrees around their longitudinal axis, being crossed near the center. In this known pump wheel, only a very small area of the sheet metal disk is used for the pumping action.

Der Erfindung liegt daher die Aufgabe zugrunde, das Lüfterrad derart zu verbessern, daß die Schaufeln eine bei gleichen Lüfterraddurchmesser möglichst große wirksame Schaufelfläche aufweisen, damit das Lüfterrad einen besseren Wirkungsgrad bei geringer Geräuschentwicklung aufweist. Gleichzeitig soll aber der Vorteil der kostengünstigen Herstellungsweise durch Verformen einer Metallblechscheibe erhalten bleiben.The invention is therefore based on the object of improving the fan wheel in such a way that the blades have an effective blade area which is as large as possible with the same fan wheel diameter, so that the fan wheel has better efficiency with low noise. At the same time, however, the advantage of the inexpensive method of production by deforming a sheet metal plate should be retained.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß mit den Kanten von sägezahnförmigen Vorsprüngen eines kreissägeblattförmigen, ebenen Zentrums aus der Ebene des Zentrums herausgebogene Schaufelfüße einstückig verbunden sind, welche sich in, in radialer Richtung erstreckenden Lüfterschaufeln fortsetzen, wobei die Lüfterschaufeln jeweils breiter als die Vorsprünge sind.This object is achieved in that with the edges of sawtooth-shaped projections of a circular saw blade-shaped, flat center blade roots bent out of the plane of the center are connected, which continue in fan blades extending in the radial direction, the fan blades being each wider than the projections .

Ein mit dem erfindungsmäßigen Lüfterrad ausgestatteter Radiallüfter weist den Vorteil auf, daß zur Erzeugung des gleichen Luftstromes im Vergleich zum bekannten Lüfterrad eine wesentlich geringere Leistung des Motors erforderlich ist. Das ist einerseits auf die größere wirksame Schaufelfläche und andererseits auf die strömungstechnisch günstigere Gestaltung des erfindungsgemäßen Lüfterrades zurückzuführen. Außerdem ergibt sich daraus auch eine geringere Geräuscherzeugung des Lüfters. Bei gleicher abgegebener Luftleistung vermindert sich beim Antriebsmotor des mit dem erfindungsgemäßen Lüfterrad ausgestatteten Lüfter gegenüber dem Lüfter mit bekanntem Lüfterrad die Leistungsaufnahme um mehr als 50%.A radial fan equipped with the fan wheel according to the invention has the advantage that, in order to generate the same air flow compared to the known fan wheel, a significantly lower motor output is required. This is due on the one hand to the larger effective blade area and on the other hand to the more aerodynamically advantageous design of the fan wheel according to the invention. This also results in less noise from the fan. With the same air power output, the power consumption of the fan motor equipped with the fan wheel according to the invention is reduced by more than 50% compared to the fan with a known fan wheel.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Ansprüchen 2 bis 7 enthalten. Sie ist nachstehend anhand der Figuren 1 bis 4 näher erläutert. Es zeigen:

  • Fig. 1 die Draufsicht auf die Vorderseite einer Ausführungsform des erfindungsgemäßen Lüfterrades,
  • Fig. 2 die Draufsicht auf die Vorderseite einer anderen Ausführungsform des erfindungsgemäßen Lüfterrades,
  • Fig. 3 die Draufsicht auf einen Ausschnitt der aus einem Blech ausgestanzten Abwicklung des Lüfterrades
    and
  • Fig. 4 die perspektivische Darstellung eines Ausführungsbeispieles des erfindungsgemäßen Lüfterrades.
Advantageous embodiments of the invention are contained in claims 2 to 7. It is explained in more detail below with reference to FIGS. 1 to 4. Show it:
  • 1 is a plan view of the front of an embodiment of the fan wheel according to the invention,
  • 2 shows the top view of the front of another embodiment of the fan wheel according to the invention,
  • Fig. 3 is a plan view of a section of the unwinding of the fan wheel punched out of sheet metal
    and
  • Fig. 4 is a perspective view of an embodiment of the fan wheel according to the invention.

Wie aus Fig. 1 zu erkennen, besitzt das Lüfterrad 1 ein ebenes Zentrum 4, welches die Gestalt eines Kreissägeblattes aufweist. Das Zentrum 4 besteht nämlich aus einer im wesentlichen kreisförmigen Ronde, welche am Umfang mit einer Mehrzahl von sägezahnförmigen Vorsprüngen 3 besetzt ist. Einstückig mit einer Kante der sägezahnförmigen Vorsprünge 3 sind die Schaufelfüße 5 (in den Figuren 1 und 2 nicht zu erkennen) und die Lüfterschaufeln 2. welche mit der Ebene des Zentrums etwa einen rechten Winkel einschließen. Die beiden Ausführungsformen des Lüfterrades gemäß Fig. 1 und Fig. 2 unterscheiden sich dadurch, daß bei der Ausführungsform gemäß Fig. 1 die Schaufelfüße 5 und somit die Lüfterschaufeln 2 mit der Außenkante 6 der sägezahnförmigen Vorsprünge 3 in Verbindung stehen, während sie bei der Ausführungsform gemäß Fig. 2 mit der Vorderkante 7 der sägezahnförmigen Vorsprünge 3 in Verbindung stehen.As can be seen from Fig. 1, the fan wheel 1 has a flat center 4, which has the shape of a circular saw blade. The center 4 consists namely of an essentially circular blank, which is circumferentially covered with a plurality of sawtooth-shaped projections 3. In one piece with an edge of the sawtooth-shaped projections 3 are the blade feet 5 (cannot be seen in FIGS. 1 and 2) and the fan blades 2, which correspond to the plane of the center include about a right angle. The two embodiments of the fan wheel according to FIGS. 1 and 2 differ in that, in the embodiment according to FIG. 1, the blade feet 5 and thus the fan blades 2 are connected to the outer edge 6 of the sawtooth-shaped projections 3, while in the embodiment 2 with the front edge 7 of the sawtooth-shaped projections 3 in connection.

Wie aus Fig. 3 zu erkennen, weist die Abwicklung des Lüfterrades 1 eine Mehrzahl von Lüfterschaufeln 2 auf, welche vom Zentrum 4 strahlenförmig nach außen verlaufen. Die Lüfterschaufeln 2 sind durch die einen etwa S-förmigen Verlauf aufweisende Trennfuge 8 getrennt, welche beim Stanzen entstanden ist. Die Lüfterschaufeln 2 stehen lediglich über dem Schaufelfuß 5 mit dem Zentrum 4 des Lüfterrades in Verbindung.As can be seen from FIG. 3, the development of the fan wheel 1 has a plurality of fan blades 2, which run radially outward from the center 4. The fan blades 2 are separated by an approximately S-shaped parting line 8, which was created during punching. The fan blades 2 are only connected to the center 4 of the fan wheel via the blade root 5.

Das Lüfterrad wird in folgender Weise hergestellt: Nach dem Ausstanzen der Abwicklung 1 aus einem ebenen Blech werden die Lüfterschaufeln gebogen, beispielsweise kreisförmig auf den Betrachter zu (bei der aus Fig. 3 ersichtlichen Lage der Abwicklung). Anschließend werden die Lüfterschaufeln 2 an der strichlierten Linie 9 um 90 Winkelgrade (ebenfalls auf den Betrachter zu) umgebogen. Nachdem das Zentrum 4 mit einer Nabe 10 versehen worden ist, ist ein Lüfterrad entstanden, wie es aus Fig. 2 ersichtlich ist.The fan wheel is produced in the following way: After the unwinding 1 has been punched out of a flat sheet, the fan blades are bent, for example in a circular manner towards the viewer (in the position of the unrolling shown in FIG. 3). Subsequently, the fan blades 2 are bent through 90 angular degrees on the dashed line 9 (also towards the viewer). After the center 4 has been provided with a hub 10, a fan wheel has arisen, as can be seen from FIG. 2.

Wie aus den Figuren zu erkennen ist, kann das erfindungsgemäße Lüfterrad werkzeugtechnisch in einfacher Weise für jeden Anwendungsfall strömungstechnisch optimal hergestellt werden. Eine solche Möglichkeit besteht bei den in der Herstellung erheblich teureren Lüfterrädern aus Guß, wobei jedoch für jede Schaufelform eine andere Spritzgußform erforderlich ist. Ein weiterer Vorteil des erfindungsgemäßen Lüfterrades besteht in der erheblich höheren Temperaturbeständigkeit des in der Regel verwendeten Stahlblechs im Vergleich mit dem üblichen Aluminium-Druckgußrad.As can be seen from the figures, the fan wheel according to the invention can be optimally produced in terms of flow technology in a simple manner for every application. Such a possibility exists in the case of the fan wheels made of cast, which are considerably more expensive to manufacture, but a different injection mold is required for each blade shape. Another advantage of the fan wheel according to the invention is the considerably higher temperature resistance of the steel sheet generally used in comparison with the usual aluminum die-cast wheel.

Claims (7)

  1. Impeller made from a sheet-metal disk and having a plurality of blades which are formed by cuts in the sheet-metal disk and are bent out of the plane of the sheet-metal disks at essentially right angles,
    characterized in that the edges of sawtooth-shaped projections (3) from a circular-saw-blade-shaped flat center portion (4) have blade roots (5) integrally connected therewith which are bent out of the plane of the center portion (4) and continue as radially extending blades (2) each of which is wider than the projections (3).
  2. An impeller as claimed in claim 1, characterized in that the blade roots (5) are connected with the leading edges (7) of the sawtooth-shaped projections (3).
  3. An impeller as claimed in claim 1, characterized in that the blade roots (5) are connected with the trailing edges (6) of the sawtooth-shaped projections (3).
  4. An impeller as claimed in claim 1 and in claim 2 or 3, characterized in that the blades (2) are curved.
  5. An impeller as claimed in claim 4, characterized in that the blades (2) are additionally twisted.
  6. Method of manufacturing an impeller as claimed in claims 1 to 5, characterized by the following steps:
    a) stamping a flat sheet-metal blank to form a part whose shape corresponds to the development of the impeller, consisting of the center portion, the blade roots, and the blades, and
    b) bending the blades out of the plane of the center portion by about 90 angular degrees on a straight line at the boundary between the sawtooth-shaped projections and the blade roots.
  7. A method as claimed in claim 6, characterized in that after step a), the blades are first bent out of the plane of the center portion into a bowllike shape to produce the curvature, and, if necessary, are simultaneously twisted.
EP88112859A 1987-08-10 1988-08-06 Fan rotor manufactured from a thin metal disc, and its production method Expired - Lifetime EP0303924B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88112859T ATE68852T1 (en) 1987-08-10 1988-08-06 FAN WHEEL MADE FROM A DISC OF METAL SHEET AND METHOD FOR ITS MANUFACTURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3726522 1987-08-10
DE19873726522 DE3726522A1 (en) 1987-08-10 1987-08-10 FAN WHEEL MADE FROM A METAL SHEET AND METHOD FOR THE PRODUCTION THEREOF

Publications (3)

Publication Number Publication Date
EP0303924A2 EP0303924A2 (en) 1989-02-22
EP0303924A3 EP0303924A3 (en) 1989-06-07
EP0303924B1 true EP0303924B1 (en) 1991-10-23

Family

ID=6333420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88112859A Expired - Lifetime EP0303924B1 (en) 1987-08-10 1988-08-06 Fan rotor manufactured from a thin metal disc, and its production method

Country Status (6)

Country Link
US (1) US5007801A (en)
EP (1) EP0303924B1 (en)
JP (1) JPS6463699A (en)
AT (1) ATE68852T1 (en)
DE (2) DE3726522A1 (en)
ES (1) ES2027738T3 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310121B1 (en) * 1987-09-30 1992-06-17 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Production method of pumping and/or guiding means for fluid machines and radial impeller manufactured thereby, in particular coolant impeller for combustion engines
US5479554A (en) * 1994-01-11 1995-12-26 Windsor Communications Splice closure apparatus for continuous optical ground wire communications cable and splicing system
US6511294B1 (en) 1999-09-23 2003-01-28 General Electric Company Reduced-stress compressor blisk flowpath
GB2361034A (en) * 2000-04-05 2001-10-10 Hansen Transmissions Int Air impellor formed from sheet material
DE10020878C2 (en) * 2000-04-28 2002-05-02 Verax Ventilatoren Gmbh Fans, in particular for ventilating electronic devices
US6524070B1 (en) 2000-08-21 2003-02-25 General Electric Company Method and apparatus for reducing rotor assembly circumferential rim stress
US6471474B1 (en) 2000-10-20 2002-10-29 General Electric Company Method and apparatus for reducing rotor assembly circumferential rim stress
DE102005046056A1 (en) * 2005-09-27 2007-03-29 Robert Bosch Gmbh Fan e.g. radial fan, propeller for delivering cooling air for e.g. motor vehicle generator, has disk part from which blades run out, where blades have rear edge with height, and ratio of length of distance to height lies in specific range
JP2013160096A (en) * 2012-02-02 2013-08-19 Aisin Seiki Co Ltd Blade member for fluid pump
EP2867537B1 (en) 2012-06-20 2020-02-19 Philadelphia Mixing Solutions, Ltd. High efficiency, non-ragging, formed axial impeller
CN104226797B (en) * 2013-06-20 2017-12-22 富瑞精密组件（昆山）有限公司 The manufacture method of fan propeller
TWI581876B (en) * 2013-06-20 2017-05-11 鴻準精密工業股份有限公司 Method for manufacturing fan rotor
USD911397S1 (en) 2018-02-28 2021-02-23 Deere & Company Tine device
US10863674B2 (en) 2018-02-28 2020-12-15 Deere & Company Tine device for an impeller apparatus
CN110630341A (en) * 2018-06-25 2019-12-31 廖紫成 Pecan wheel pressure rotating power machine and power system thereof
CN111408912B (en) * 2020-05-14 2021-08-20 中国兵器工业第五九研究所 Preparation method and clamping tool for small-diameter narrow-gap thin-wall multi-blade component

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR412148A (en) * 1910-01-13 1910-07-04 William Snee Turbine-type motors
US1469086A (en) * 1921-07-15 1923-09-25 Nelson H Henderson Centrifugal fan and method of making the same
US1734541A (en) * 1925-03-12 1929-11-05 Winslow Boiler & Engineering C Process of making fans
US1827316A (en) * 1929-11-18 1931-10-13 Mcquay Radiator Corp Rotor
US2011298A (en) * 1932-05-18 1935-08-13 Justin E Osbun Blower
US2064845A (en) * 1933-03-31 1936-12-22 Lawton R Moray Propelling device
US2117011A (en) * 1935-02-27 1938-05-10 Ward E Pratt Centrifugal pump
US2352127A (en) * 1942-10-01 1944-06-20 Louis Ruprecht Pulverizing mill rotor
US2731193A (en) * 1951-05-19 1956-01-17 Hayes Ind Inc Air circulating fan construction and method of making the same
FR1360738A (en) * 1963-02-01 1964-05-15 Renault Improvements to centrifugal fans, in particular for automotive air conditioners
DE1503633A1 (en) * 1965-08-05 1969-03-13 Union Sils Van De Loo & Co Double-sided suction impeller for radial blowers, especially for fan heaters
US3951611A (en) * 1974-11-14 1976-04-20 Morrill Wayne J Blank for fan blade
DE2617029A1 (en) * 1975-05-13 1976-12-02 Nippon Denso Co FAN WHEEL
US4184804A (en) * 1975-10-10 1980-01-22 Nippon Soken, Inc. Rotary electric machine having a cooling fan
JPS5297402A (en) * 1976-02-12 1977-08-16 Aisin Seiki Co Ltd Vane wheel
JPS6012859B2 (en) * 1976-02-20 1985-04-03 株式会社日本自動車部品総合研究所 Rotating electrical machine with cooling fan
JPS5371307A (en) * 1976-12-07 1978-06-24 Mitsubishi Electric Corp Manufacturing method of siroccofan
JPS58159934A (en) * 1982-03-17 1983-09-22 Akaishi Kinzoku Kogyo Kk Cooling fan and its manufacture
US4610601A (en) * 1984-07-02 1986-09-09 Gerfast Sten R Method of making axial fan impeller
DD259975A3 (en) * 1986-07-07 1988-09-14 Merbelsrod Geraete Pumpen Veb BLECHLAUFRAD SMALL FOERDERLEISTUNG, ESPECIALLY FOR COOLANT PUMPS

Also Published As

Publication number Publication date
US5007801A (en) 1991-04-16
DE3865775D1 (en) 1991-11-28
JPS6463699A (en) 1989-03-09
ATE68852T1 (en) 1991-11-15
EP0303924A3 (en) 1989-06-07
ES2027738T3 (en) 1992-06-16
EP0303924A2 (en) 1989-02-22
DE3726522A1 (en) 1989-02-23

Similar Documents

Publication Publication Date Title
EP0303924B1 (en) Fan rotor manufactured from a thin metal disc, and its production method
EP1934483B1 (en) Ventilator wheel
DE69625723T2 (en) ROTARY CONNECTOR FOR COOLING FAN AND MOTOR
DE4446110C2 (en) Cooling fan assembly for alternator
DE3528748C2 (en)
DE102013105524B4 (en) centrifugal fan
WO2011038884A1 (en) Cross-flow fan
DE3907565A1 (en) AXIAL FAN
DE69419544T2 (en) Eddy current blower and paddle wheel
DE2652642A1 (en) AXIAL FAN WITH THE EXTERIOR CONTOUR OF A SQUARE WITH SOME QUADRATIC LIMITING AREAS
DE2544379C3 (en) Fan rotor for a cross-flow fan
CH646229A5 (en) METHOD FOR PRODUCING A ROTOR WITH AT LEAST ONE VANCOVER FOR A TURBOMOLECULAR PUMP AND ROTOR PRODUCED BY THIS METHOD.
EP3608546A1 (en) Impeller for a fluid transport device and fluid transport device
DE2046486C3 (en) Impeller for fan
DE2263310A1 (en) FAN WITH FLEXIBLE WINGS
DE3220574A1 (en) STEEL-FREE AXIAL FAN, ESPECIALLY FOR ELECTRICALLY DRIVED MOTOR VEHICLE RADIATOR FANS
DE102008034422A1 (en) Rotor for brushless motor, has locally limited filling layer sections formed during extrusion of carrier body from plastic and provided in plane of first lamella between two adjacent second lamellas
DE19707557B4 (en) Paddle wheel for a machine through which a medium flows
DE69617840T2 (en) Alternator with internal ventilation device, especially for cars
EP1258636B1 (en) Fan rotor and fan, particularly a radial fan
EP0496084A1 (en) Impeller for centrifugal pumps
DE10252538B4 (en) Blower wheel and method for its production
EP0739452B1 (en) Sheet-metal centrifugal pump impeller with discharge apertures
DD238256A5 (en) axial fan
EP0114023A2 (en) Blade mountings of an axial fan driven by a disc-type motor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19891114

17Q First examination report despatched

Effective date: 19900709

ITF It: translation for a ep patent filed

Owner name: DOTT. ANTONIO SERGI

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 68852

Country of ref document: AT

Date of ref document: 19911115

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3865775

Country of ref document: DE

Date of ref document: 19911128

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2027738

Country of ref document: ES

Kind code of ref document: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19920826

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19921017

Year of fee payment: 5

EPTA Lu: last paid annual fee
ITPR It: changes in ownership of a european patent

Owner name: CAMBIO RAGIONE SOCIALE;ALCATEL SEL AKTIENGESELLSCH

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930527

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930723

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19930806

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19930812

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19930825

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19930826

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930831

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930917

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19931116

Year of fee payment: 6

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: ALCATEL SEL AKTIENGESELLSCHAFT TE STUTTGART, BONDS

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940503

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940806

Ref country code: AT

Effective date: 19940806

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19940807

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 19940808

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940831

Ref country code: CH

Effective date: 19940831

Ref country code: BE

Effective date: 19940831

EAL Se: european patent in force in sweden

Ref document number: 88112859.9

BERE Be: lapsed

Owner name: STANDARD ELEKTRIK LORENZ A.G.

Effective date: 19940831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19950301

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940806

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950428

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed

Ref document number: 88112859.9

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19991007

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050806