EP2113054A1 - Impeller made of flat material - Google Patents

Impeller made of flat material

Info

Publication number
EP2113054A1
EP2113054A1 EP08759127A EP08759127A EP2113054A1 EP 2113054 A1 EP2113054 A1 EP 2113054A1 EP 08759127 A EP08759127 A EP 08759127A EP 08759127 A EP08759127 A EP 08759127A EP 2113054 A1 EP2113054 A1 EP 2113054A1
Authority
EP
European Patent Office
Prior art keywords
impeller
blades
impeller according
bent
fastening parts
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
Application number
EP08759127A
Other languages
German (de)
French (fr)
Other versions
EP2113054B1 (en
Inventor
Thomas Materne
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.)
Wilo SE
Original Assignee
Wilo 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 Wilo AG filed Critical Wilo AG
Publication of EP2113054A1 publication Critical patent/EP2113054A1/en
Application granted granted Critical
Publication of EP2113054B1 publication Critical patent/EP2113054B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • F04D29/2233—Construction and assembly entirely open or stamped from one sheet
    • 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
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans

Definitions

  • the invention relates to an impeller of a pump or a blower of a one-piece material, in particular of sheet metal with a flat central region, on the outer edge of the blades are formed and bent.
  • a sheet-metal wheel with a low delivery rate is known from DE 3717229 A1.
  • the central region of the impeller plate is deformed to a central sleeve which projects on the rear side of the impeller and in which the pump shaft can be fastened.
  • the production of such a cylindrical scar is relatively expensive.
  • the object of the invention is to improve an impeller of the type mentioned so that it has a low weight and thus a low moment of inertia with simple cost-effective production. It is also an object of the invention to provide an impeller that allows easy installation and is suitable for smaller pumps or blowers.
  • An advantageous embodiment is given when a particular web-shaped portion of the material areas located between the blades is bent to the rear side.
  • the fastening parts are bent so far back that they define a space to form the impeller, in or on which the pump shaft can be fastened.
  • the fasteners may be bent back around a tangent of the central region.
  • a particularly advantageous production with optimum use of the material is achieved when the fasteners sit in the non-bent state in a region of the sheet material, which is formed by a taper of an adjacent blade.
  • particularly favorable conveying impeller blades are created, wherein the taper of the blades near the blade root allows a simple rotation of the blade.
  • the radial extent of the fastening parts is a quarter to a sixth of the impeller diameter. Furthermore, it is advantageous if the fastening parts are bent backwards by at least 90 degrees. A secure hold on positive engagement with the shaft is achieved when the fasteners are curved in their surface corresponding to the surface of the pump shaft.
  • the blades be bent around one Axis are rotated, which corresponds substantially to the longitudinal direction of the blade.
  • the blades are rotated about an axis which corresponds to a radius of the impeller or is parallel to a radius of the impeller or is at an acute angle to a radius of the impeller.
  • Fig. 1 is a plan view of the impeller forming sheet metal part after his
  • Fig. 2 is an oblique view without pump shaft
  • Fig. 3 is an oblique view with enclosed pump shaft.
  • the impeller 1 of a pump or a blower is punched out of a one-piece, sheet-like material, in particular made of sheet metal, and then has the shape shown in FIG. It has a central central region 2, on which blades 3 are formed in an approximately radial direction. Within an inner region 6, which is larger than the central region 2, the remaining material areas remaining between the blades 3 are used as fastening parts 4, the fastening parts 4 and the blades 3 adjoining each other except for the stamped slots 5 located therebetween.
  • Each blade 3 has an outer wider portion 3a which tapers outwardly and an inner portion 3b which tapers towards the center of the rotor and forms a narrow foot portion 3c which merges into the central portion 2.
  • the concave taper 3d of the blade 3 surrounds a correspondingly shaped convex bulge 4a of the fastening part 4.
  • the blades 3 thus protrude with their outer region 3a beyond the inner region 6, while the fastening parts 4 remain within the region 6 and with their outer ends adjoin this.
  • the blades 3 are each bent by an impeller radius A to the front side V of the impeller, wherein in this bending only the foot region 3c is wound.
  • the blades are thus rotated about an axis A, which corresponds to a radius A of the running radius. Instead, however, the axis of rotation A may be parallel to a radius of the impeller or be at an acute angle to the radius A. In each of these cases, however, all or a majority of the blade 3 is bent over to the front side V of the impeller. This bend can be 90 degrees or deviate from it.
  • the fastening parts 4 are bent around a tangent B of the central region 2 to the rear by at least 90 degrees to form a mounting space 7, in which the pump shaft 8 can be inserted.
  • the fasteners 4 surrounded so all around the shaft 8, wherein the fasteners 4 may be curved in its surface corresponding to the surface of the pump shaft, so that all fasteners together with their inner sides as it forms a socket for the shaft 8 and with their inner sides on the outer surface of the Wave 8 abut.
  • the blades 3 may be curved in their surface in order to increase the hydraulic efficiency in a preferred direction. Furthermore, the blades may have the same or different structures and the number of blades 3 corresponds to the particular hydraulic requirements for the impeller. To form the fastening parts 4, not the entire material areas located between the blades 3 have to be used. Elongated subareas, in particular in web form, are also sufficient for this purpose.
  • the fasteners 4 can give the hub a conical shape, so that a secure hold against twists and displacements of the impeller is given on the shaft.
  • Suitable materials for the impeller are steels that have sufficient rigidity, have a suitable spring action to prevent deformation and thus allow a secure attachment of the shaft.
  • stainless steel is to be preferred.

Landscapes

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

Abstract

The invention relates to an impeller (1) of a pump or a fan, made of a single piece of material, particularly sheet metal, having a flat central region (2). The vanes (3) are formed on the outer edge of said region and are bent, wherein remaining material regions between the vanes (3) are bent partially towards the back and form fastening elements for the pump shaft (8).

Description

Laufrad aus flächigem Material Impeller made of flat material
Die Erfindung betrifft ein Laufrad einer Pumpe oder eines Gebläses aus einem einstückigen Material insbesondere aus Blech mit einem ebenen Zentralbereich, an dessen Außenrand die Schaufeln angeformt und umgebogen sind.The invention relates to an impeller of a pump or a blower of a one-piece material, in particular of sheet metal with a flat central region, on the outer edge of the blades are formed and bent.
Ein Blechlaufrad mit kleiner Förderleistung ist aus der DE 3717229 A1 bekannt. Zum Erzeugen einer Nabe ist der mittlere Bereich des Laufradbleches zu einer zentralen Buchse verformt, die an der Rückseite des Laufrades vorsteht und in der die Pumpenwelle befestigbar ist. Das Herstellen einer solchen zylindrischen Narbe ist verhältnismäßig aufwendig.A sheet-metal wheel with a low delivery rate is known from DE 3717229 A1. For generating a hub, the central region of the impeller plate is deformed to a central sleeve which projects on the rear side of the impeller and in which the pump shaft can be fastened. The production of such a cylindrical scar is relatively expensive.
Aufgabe der Erfindung ist es, ein Laufrad der eingangs genannten Art so zu verbessern, dass es bei einfacher kostengünstiger Herstellung ein geringes Gewicht und damit ein niedriges Massenträgheitsmoment besitzt. Auch ist es Aufgabe der Erfindung, ein Laufrad zu schaffen, dass eine einfache Montage erlaubt und für kleinere Pumpen oder Gebläse geeignet ist.The object of the invention is to improve an impeller of the type mentioned so that it has a low weight and thus a low moment of inertia with simple cost-effective production. It is also an object of the invention to provide an impeller that allows easy installation and is suitable for smaller pumps or blowers.
Diese Aufgaben werden erfindungsgemäß dadurch gelöst, dass zwischen den Schaufeln befindliche restliche Materialbereiche insbesondere zu einem Teil zur Rückseite hin umgebogen sind und Befestigungsteile für die Pumpenwelle bilden. Die auf diese Weise gebildeten Befestigungsteile stellen eine besonders einfach herstellbare Befestigung für die Pumpen-/Gebläse- bzw. für die Motorenwelle dar. Hierbei hat das Laufrad ein besonders geringes Gewicht und damit ein niedriges Massenträgheitsmoment. Auch ist die Montage an den zurückgebogenen Befestigungsteilen besonders einfach.These objects are achieved according to the invention by virtue of the fact that residual material areas located between the blades are bent in particular to a part towards the rear and form fastening parts for the pump shaft. The fasteners formed in this way represent a particularly easy to manufacture attachment for the pump / fan or for the motor shaft. Here, the impeller has a very low weight and thus a low moment of inertia. Also, the mounting on the bent-back fastening parts is particularly simple.
Eine vorteilhafte Ausführung ist dann gegeben, wenn ein insbesondere stegförmiger Teilbereich der zwischen den Schaufeln befindlichen Materialbereiche zur Rückseite hin umgebogen ist.An advantageous embodiment is given when a particular web-shaped portion of the material areas located between the blades is bent to the rear side.
Vorzugsweise wird vorgeschlagen, dass die Befestigungsteile so weit nach hinten umgebogen sind, dass sie zur Bildung der Laufradnarbe einen Raum umgrenzen, in oder an dem die Pumpenwelle befestigbar ist. Auch können die Befestigungsteile um eine Tangente des Zentralbereichs nach hinten umgebogen sein.Preferably, it is proposed that the fastening parts are bent so far back that they define a space to form the impeller, in or on which the pump shaft can be fastened. Also, the fasteners may be bent back around a tangent of the central region.
Eine besonders vorteilhafte Herstellung bei optimaler Nutzung des Materials wird erreicht, wenn die Befestigungsteile im nicht umgebogenen Zustand in einem Bereich des flächigen Materials sitzen, der durch eine Verjüngung einer benachbarten Schaufel gebildet ist. Hierdurch werden darüber hinaus besonders günstige förderwirksame Laufradschaufeln geschaffen, wobei die Verjüngung der Schaufeln nahe des Schaufelfußes eine einfache Verdrehung der Schaufel erlaubt.A particularly advantageous production with optimum use of the material is achieved when the fasteners sit in the non-bent state in a region of the sheet material, which is formed by a taper of an adjacent blade. In this way, moreover, particularly favorable conveying impeller blades are created, wherein the taper of the blades near the blade root allows a simple rotation of the blade.
Vorzugsweise wird vorgeschlagen, dass die radiale Erstreckung der Befestigungsteile ein Viertel bis ein Sechstel des Laufraddurchmessers beträgt. Ferner ist es von Vorteil, wenn die Befestigungsteile um mindestens 90 Grad nach hinten umgebogen sind. Ein sicherer Halt bei Formschluss an der Welle wird erreicht, wenn die Befestigungsteile in ihrer Fläche entsprechend der Oberfläche der Pumpenwelle gewölbt sind.It is preferably proposed that the radial extent of the fastening parts is a quarter to a sixth of the impeller diameter. Furthermore, it is advantageous if the fastening parts are bent backwards by at least 90 degrees. A secure hold on positive engagement with the shaft is achieved when the fasteners are curved in their surface corresponding to the surface of the pump shaft.
Bei einem Laufrad einer Pumpe oder eines Gebläses aus einem einstückigen flächigen Material insbesondere aus Blech mit am Außenrand angeformten Schaufeln wird vorgeschlagen, dass die Schaufeln zum Umbiegen um eine Achse gedreht sind, die im Wesentlichen der Längsausrichtung der Schaufel entspricht. Durch eine solche Ausgestaltung gelingt es, verhältnismäßig große und sich lang erstreckende Schaufeln zu schaffen bei verhältnismäßig kleinem inneren pumpenunwirksamen Zentralbereich. Hierzu wird vorzugsweise vorgeschlagen, dass die Schaufeln um eine Achse gedreht sind, die einem Radius des Laufrades entspricht oder parallel zu einem Radius des Laufrades ist oder in einem spitzen Winkel zu einem Radius des Laufrades steht.In an impeller of a pump or a blower of a one-piece sheet material, in particular made of sheet metal with blades formed on the outer edge, it is proposed that the blades be bent around one Axis are rotated, which corresponds substantially to the longitudinal direction of the blade. By such a configuration, it is possible to create relatively large and long-extending blades at relatively small inner pump ineffective central area. For this purpose, it is preferably proposed that the blades are rotated about an axis which corresponds to a radius of the impeller or is parallel to a radius of the impeller or is at an acute angle to a radius of the impeller.
Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den übrigen Ansprüchen enthalten und führen zu optimalen Pumpleistungen, zu einfacher und preiswerter Herstellung und einer optimalen Nutzung des Materials.Further advantageous embodiments of the invention are contained in the other claims and lead to optimum pumping performance, to simple and inexpensive production and optimal use of the material.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im Folgenden näher beschrieben.An embodiment of the invention is illustrated in the drawings and will be described in more detail below.
Es zeigen:Show it:
Fig. 1 eine Draufsicht auf das das Laufrad bildende Blechteil nach seinerFig. 1 is a plan view of the impeller forming sheet metal part after his
Ausstanzung und vor dem Ab- bzw. Umbiegen der Schaufeln und der Befestigungsteile,Punching and before bending off or bending over the blades and the fastening parts,
Fig. 2 eine Schrägansicht ohne Pumpenwelle undFig. 2 is an oblique view without pump shaft and
Fig. 3 eine Schrägansicht mit einliegender Pumpenwelle.Fig. 3 is an oblique view with enclosed pump shaft.
Das Laufrad 1 einer Pumpe oder eines Gebläses ist aus einem einstückigen, flächigen Material insbesondere aus Blech ausgestanzt und weist dann die in Fig. 1 dargestellte Form auf. Es besitzt einen mittigen Zentralbereich 2, an dem Schaufeln 3 in etwa radialer Richtung angeformt sind. Innerhalb eines inneren Bereichs 6, der größer ist als der Zentralbereich 2, sind die zwischen den Schaufeln 3 verbliebenen restlichen Materialbereiche als Befestigungsteile 4 genutzt, wobei die Befestigungsteile 4 und die Schaufeln 3 bis auf die dazwischen liegenden gestanzten Schlitze 5 aneinander angrenzen. Jede Schaufel 3 weist einen äußeren breiteren Bereich 3a auf, der nach außen hin sich verjüngt und einen inneren Bereich 3b auf, der sich zur Laufradmitte hin verjüngt und einen schmalen Fußbereich 3c bildet, der in den Zentralbereich 2 übergeht. Die konkave Verjüngung 3d der Schaufel 3 umgibt eine entsprechend geformte konvexe Ausbauchung 4a des Befestigungsteils 4. Die Schaufeln 3 ragen somit mit ihrem äußeren Bereich 3a über den inneren Bereich 6 hinaus, während die Befestigungsteile 4 innerhalb des Bereichs 6 bleiben und mit ihren äußeren Enden an diesen angrenzen.The impeller 1 of a pump or a blower is punched out of a one-piece, sheet-like material, in particular made of sheet metal, and then has the shape shown in FIG. It has a central central region 2, on which blades 3 are formed in an approximately radial direction. Within an inner region 6, which is larger than the central region 2, the remaining material areas remaining between the blades 3 are used as fastening parts 4, the fastening parts 4 and the blades 3 adjoining each other except for the stamped slots 5 located therebetween. Each blade 3 has an outer wider portion 3a which tapers outwardly and an inner portion 3b which tapers towards the center of the rotor and forms a narrow foot portion 3c which merges into the central portion 2. The concave taper 3d of the blade 3 surrounds a correspondingly shaped convex bulge 4a of the fastening part 4. The blades 3 thus protrude with their outer region 3a beyond the inner region 6, while the fastening parts 4 remain within the region 6 and with their outer ends adjoin this.
Die Schaufeln 3 sind jeweils um einen Laufradradius A zur Vorderseite V des Laufrades hin gebogen, wobei bei diesem Biegen nur der Fußbereich 3c verwunden wird. Die Schaufeln werden somit um eine Achse A gedreht, die einem Radius A des Laufradius entspricht. Stattdessen kann aber auch die Drehachse A parallel zu einem Radius des Laufrades sein oder in einem spitzen Winkel zum Radius A stehen. In jedem dieser Fälle ist aber das Gesamte oder ein Großteil der Schaufel 3 zur Vorderseite V des Laufrades umgebogen. Diese Biegung kann 90 Grad betragen oder hiervon abweichen.The blades 3 are each bent by an impeller radius A to the front side V of the impeller, wherein in this bending only the foot region 3c is wound. The blades are thus rotated about an axis A, which corresponds to a radius A of the running radius. Instead, however, the axis of rotation A may be parallel to a radius of the impeller or be at an acute angle to the radius A. In each of these cases, however, all or a majority of the blade 3 is bent over to the front side V of the impeller. This bend can be 90 degrees or deviate from it.
Die Befestigungsteile 4 werden um eine Tangente B des Zentralbereichs 2 nach hinten um mindestens 90 Grad umgebogen, um einen Befestigungsraum 7 zu bilden, in den die Pumpenwelle 8 einsteckbar ist. Die Befestigungsteile 4 umgeben damit rundum die Welle 8, wobei die Befestigungsteile 4 in ihrer Fläche entsprechend der Oberfläche der Pumpenwelle gewölbt sein können, so dass alle Befestigungsteile zusammen mit ihren Innenseiten gleichsam eine Buchse für die Welle 8 bilden und mit ihren Innenseiten an der Außenfläche der Welle 8 anliegen.The fastening parts 4 are bent around a tangent B of the central region 2 to the rear by at least 90 degrees to form a mounting space 7, in which the pump shaft 8 can be inserted. The fasteners 4 surrounded so all around the shaft 8, wherein the fasteners 4 may be curved in its surface corresponding to the surface of the pump shaft, so that all fasteners together with their inner sides as it forms a socket for the shaft 8 and with their inner sides on the outer surface of the Wave 8 abut.
Die Schaufeln 3 können in ihrer Fläche gekrümmt sein, um den hydraulischen Wirkungsgrad in einer Vorzugsrichtung zu erhöhen. Ferner können die Schaufeln gleiche oder ungleiche Strukturen aufweisen und die Anzahl der Schaufeln 3 entspricht den insbesondere hydraulischen Anforderungen an das Laufrad. Zum Bilden der Befestigungsteile 4 müssen nicht die gesamten zwischen den Schaufeln 3 befindlichen Materialbereiche benutzt werden. Hierzu reichen auch längliche Teilbereiche insbesondere in Stegform.The blades 3 may be curved in their surface in order to increase the hydraulic efficiency in a preferred direction. Furthermore, the blades may have the same or different structures and the number of blades 3 corresponds to the particular hydraulic requirements for the impeller. To form the fastening parts 4, not the entire material areas located between the blades 3 have to be used. Elongated subareas, in particular in web form, are also sufficient for this purpose.
Die Befestigungsteile 4 können der Nabe eine konische Form geben, so dass ein sicherer Halt gegenüber Verdrehungen und Verschiebungen des Laufrades auf der Welle gegeben ist. Als Material für das Laufradblech eignen sich Stähle, die eine ausreichende Steifigkeit aufweisen, über eine geeignete Federwirkung verfügen, um Verformungen zu verhindern und damit eine sichere Befestigung der Welle ermöglichen. Für Zikulationspumpen ist Edelstahl zu bevorzugen. The fasteners 4 can give the hub a conical shape, so that a secure hold against twists and displacements of the impeller is given on the shaft. Suitable materials for the impeller are steels that have sufficient rigidity, have a suitable spring action to prevent deformation and thus allow a secure attachment of the shaft. For ciculation pumps stainless steel is to be preferred.

Claims

Ansprüche claims
1. Laufrad einer Pumpe oder eines Gebläses aus einem einstückigen Material insbesondere aus Blech mit einem ebenen Zentralbereich (2), an dessen Außenrand die Schaufeln (3) angeformt und umgebogen sind, dadurch gekennzeichnet, dass zwischen den Schaufeln (3) befindliche restliche Materialbereiche insbesondere zu einem Teil zur Rückseite (R) hin umgebogen sind und Befestigungsteile (4) für die Pumpenwelle (8) bilden.1. impeller of a pump or a blower of a one-piece material, in particular of sheet metal with a flat central region (2), on the outer edge of the blades (3) are formed and bent, characterized in that between the blades (3) located residual material areas in particular are bent to a part to the back (R) out and form fasteners (4) for the pump shaft (8).
2. Laufrad nach Anspruch 1, dadurch gekennzeichnet, dass ein insbesondere stegförmiger Teilbereich der zwischen den Schaufeln (3) befindlichen Materialbereiche zur Rückseite (R) hin umgebogen ist.2. impeller according to claim 1, characterized in that a particular web-shaped portion of the blade between the (3) located material areas to the back (R) is bent back.
3. Laufrad nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Befestigungsteile (4) so weit nach hinten umgebogen sind, dass sie zur Bildung der Laufradnabe einen Raum (7) umgrenzen, in oder an dem die Pumpenwelle (8) befestigbar ist.3. impeller according to claim 1 or 2, characterized in that the fastening parts (4) are bent back so far that they define a space (7) to form the impeller hub, in or on which the pump shaft (8) can be fastened.
4. Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Befestigungsteile (4) um eine Tangente (B) des Zentralbereichs (2) nach hinten umgebogen sind.4. Impeller according to one of the preceding claims, characterized in that the fastening parts (4) are bent around a tangent (B) of the central region (2) to the rear.
5. Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Befestigungsteile (4) im nicht umgebogenen Zustand in einem Bereich des flächigen Materials sitzen, der durch eine Verjüngung (3d) einer benachbarten Schaufel (3) gebildet ist. 5. impeller according to one of the preceding claims, characterized in that the fastening parts (4) sit in the non-bent state in a region of the sheet material, which is formed by a taper (3d) of an adjacent blade (3).
6. Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die radiale Erstreckung der Befestigungsteile (4) ein Viertel bis ein Sechstel des Laufraddurchmessers (D) beträgt.6. impeller according to one of the preceding claims, characterized in that the radial extent of the fastening parts (4) is a quarter to one sixth of the impeller diameter (D).
7. Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Befestigungsteile (4) um mindestens 90 Grad nach hinten umgebogen sind.7. Impeller according to one of the preceding claims, characterized in that the fastening parts (4) are bent back by at least 90 degrees.
8. Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Befestigungsteile (4) in ihrer Fläche entsprechend der Oberfläche der Pumpenwelle (8) gewölbt sind.8. impeller according to one of the preceding claims, characterized in that the fastening parts (4) are curved in their surface corresponding to the surface of the pump shaft (8).
9. Laufrad einer Pumpe oder eines Gebläses aus einem einstückigen flächigen Material insbesondere aus Blech mit einem ebenen Zentralbereich (2), an dessen Außenrand die Schaufeln (3) angeformt und umgebogen sind, insbesondere nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Schaufeln (3) zum Umbiegen um eine Achse (A) gedreht sind, die im wesentlichen der Längsausrichtung der Schaufel (3) entspricht.9. impeller of a pump or a blower of a one-piece sheet material in particular of sheet metal with a flat central region (2), on the outer edge of the blades (3) are formed and bent, in particular according to one of the preceding claims, characterized in that the blades (3) are turned for bending about an axis (A) which substantially corresponds to the longitudinal direction of the blade (3).
10. Laufrad nach Anspruch 9, dadurch gekennzeichnet, dass die Schaufeln (3) um eine Achse gedreht sind, die einem Radius (A) des Laufrades (1) entspricht oder parallel zu einem Radius (A) des Laufrades ist oder in einem spitzen Winkel zu einem Radius (A) des Laufrades steht.10. An impeller according to claim 9, characterized in that the blades (3) are rotated about an axis which corresponds to a radius (A) of the impeller (1) or parallel to a radius (A) of the impeller or at an acute angle to a radius (A) of the impeller stands.
11. Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Schaufeln (3) zur Vorderseite (V) des Laufrades (1) hin vorstehend umgebogen sind.11. An impeller according to one of the preceding claims, characterized in that the blades (3) to the front side (V) of the impeller (1) are bent over protruding.
12. Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die radiale Erstreckung der Schaufeln (3) mindestens ein Viertel insbesondere ein Drittel des Laufraddurchmessers (D) beträgt. 12. impeller according to one of the preceding claims, characterized in that the radial extent of the blades (3) is at least a quarter, in particular one third of the impeller diameter (D).
13. Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Schaufeln (3) sich verjüngend zu einem schmalen Fußbereich (3e) zulaufen, der an einem Zentralbereich (2) angeformt ist.13. An impeller according to one of the preceding claims, characterized in that the blades (3) tapering to a narrow foot area (3e) run, which is integrally formed on a central region (2).
14. Laufrad nach Anspruch 13, dadurch gekennzeichnet, dass zum Umbiegen der Schaufel (3) der schmale Fußbereich (3e) verwunden ist.14. An impeller according to claim 13, characterized in that for bending the blade (3) of the narrow foot portion (3e) is wound.
15. Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Schaufeln (3), die zwischen den Schaufeln befindlichen Bereiche (4) und der Zentralbereich (2) aus einem einzigen Stück Blech ausgestanzt sind.15. Impeller according to one of the preceding claims, characterized in that the blades (3), located between the blades regions (4) and the central region (2) are punched out of a single piece of sheet metal.
16. Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Schaufeln (3) und die Befestigungsteile (4) jeweils beidseitig zumindest in. einem inneren Bereich (6) aneinander angrenzen und nur durch Schnitt- oder Stanzlinien voneinander getrennt sind.16. Impeller according to one of the preceding claims, characterized in that the blades (3) and the fastening parts (4) each on both sides at least in. An inner region (6) adjoin one another and are separated only by cutting or punching lines.
17. Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Schaufelfläche (3) über ihre Länge eine Krümmung bzw. Wölbung aufweist.17. impeller according to one of the preceding claims, characterized in that the blade surface (3) over its length has a curvature or curvature.
18. Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass es aus Stahlblech besteht. 18. impeller according to one of the preceding claims, characterized in that it consists of sheet steel.
EP08759127A 2007-06-11 2008-06-10 Impeller made of flat material Active EP2113054B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007027370A DE102007027370A1 (en) 2007-06-11 2007-06-11 Impeller made of flat material
PCT/EP2008/004599 WO2008151770A1 (en) 2007-06-11 2008-06-10 Impeller made of flat material

Publications (2)

Publication Number Publication Date
EP2113054A1 true EP2113054A1 (en) 2009-11-04
EP2113054B1 EP2113054B1 (en) 2011-04-06

Family

ID=39684544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08759127A Active EP2113054B1 (en) 2007-06-11 2008-06-10 Impeller made of flat material

Country Status (4)

Country Link
EP (1) EP2113054B1 (en)
AT (1) ATE504745T1 (en)
DE (2) DE102007027370A1 (en)
WO (1) WO2008151770A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190111165A (en) * 2010-03-09 2019-10-01 에이엔디이 코포레이션 Unitary biochip providing sample-in to results-out processing and methods of manufacture
DE102010020574A1 (en) 2010-05-14 2011-11-17 Ksb Aktiengesellschaft Flowing device
IT202100022799A1 (en) * 2021-09-03 2023-03-03 Almes Srl FORCED VENTILATION DEVICE FOR A COOKING OVEN

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB440587A (en) * 1934-12-12 1936-01-02 Humber Ltd Fans
GB1062946A (en) * 1963-11-14 1967-03-22 Speedwell Res Ltd Improvements in or relating to centrifugal pumps
SU1267058A1 (en) * 1984-08-15 1986-10-30 Stavinskij Andrej A Method of manufacturing fan impeller
DD259975A3 (en) 1986-07-07 1988-09-14 Merbelsrod Geraete Pumpen Veb BLECHLAUFRAD SMALL FOERDERLEISTUNG, ESPECIALLY FOR COOLANT PUMPS
DE4008216A1 (en) * 1990-03-15 1991-09-19 Grundfos Int Mfg. radial blade ring impellers, etc. - forms comb-shaped blank from flat metal and bends tines to form blades
DE10052637B4 (en) * 2000-10-24 2021-03-11 Pfeiffer Vacuum Gmbh 02/16/2001 Discs for a turbo molecular pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008151770A1 *

Also Published As

Publication number Publication date
WO2008151770A1 (en) 2008-12-18
ATE504745T1 (en) 2011-04-15
DE502008003090D1 (en) 2011-05-19
EP2113054B1 (en) 2011-04-06
DE102007027370A1 (en) 2008-12-18

Similar Documents

Publication Publication Date Title
EP1801422B1 (en) Fan and fan blade
DE69105099T2 (en) Blower rotor with blades without platform and filler pieces reconstructing streamlines.
DE112011105531T5 (en) Flexible, externally toothed gear for a wave gear
EP2646695A1 (en) Axial fan
DE112012006408T5 (en) Wave generator for a wave gear
DE69625917T2 (en) RADIAL FAN WHEEL
EP2113054B1 (en) Impeller made of flat material
DE1475419B1 (en) Hub fastening for cylindrical shafts
DE3614806A1 (en) Built-in fan
DE102008030469B4 (en) Torque converter with an inner ring of several sections
EP1918588B1 (en) Stator disc for a turbo molecular pump
DE102012210933B4 (en) Cuts in the tongues of the blades of torque converters
DE10307887A1 (en) Centrifugal pump has blade whose region adjoining inlet edge has higher elasticity than remaining area in order to bend out from rest position through flow forces
DE4434598A1 (en) Radial ventilator for air cooling of small electrical motor for domestic machines and small operating equipment,
DE112022005328T5 (en) AIR FILM PRESSURE BEARING
DE2758366C3 (en) Clutch pressure plate
EP0164447B1 (en) Bearing assembly
DE2845561A1 (en) AUTOMOTIVE RADIATOR FAN
EP3198152B1 (en) Axial fan for conveying cooling air, in particular for an internal combustion engine of a motor vehicle
EP2338218B1 (en) Retaining clip for the fixation of an electric motor armature shaft bearing
DE1775132A1 (en) Attachment of a disc or the like on a shaft
DE2329922B2 (en) Axial thrust safety clamp
DE540004C (en) Turbine for steam or water with blades made of flexible material
DE102022113141A1 (en) Diverting device and fan with diverting device
DE4423322C2 (en) Fan roller for cross flow blowers

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

17P Request for examination filed

Effective date: 20090923

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20091223

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: WILO SE

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 502008003090

Country of ref document: DE

Date of ref document: 20110519

Kind code of ref document: P

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502008003090

Country of ref document: DE

Effective date: 20110519

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20110406

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

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20110406

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

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

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110706

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110808

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

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

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110707

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110806

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110717

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

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

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

BERE Be: lapsed

Owner name: WILO SE

Effective date: 20110630

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

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

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

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

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

26N No opposition filed

Effective date: 20120110

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

Ref country code: BE

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

Effective date: 20110630

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502008003090

Country of ref document: DE

Effective date: 20120110

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: LI

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

Effective date: 20120630

Ref country code: CH

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

Effective date: 20120630

Ref country code: MC

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

Effective date: 20110630

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: 20110610

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

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110706

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

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

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

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110406

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

Ref country code: GB

Payment date: 20140604

Year of fee payment: 7

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 504745

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130610

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

Ref country code: AT

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

Effective date: 20130610

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

Effective date: 20150610

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

Ref country code: GB

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

Effective date: 20150610

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

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

Ref country code: IT

Payment date: 20200519

Year of fee payment: 13

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

Effective date: 20210610

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

Ref country code: DE

Payment date: 20220518

Year of fee payment: 15

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230615

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502008003090

Country of ref document: DE

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

Ref country code: DE

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

Effective date: 20240103

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

Ref country code: FR

Payment date: 20240522

Year of fee payment: 17