EP2405143B1 - Centrifugal pump impeller - Google Patents

Centrifugal pump impeller Download PDF

Info

Publication number
EP2405143B1
EP2405143B1 EP11005625.6A EP11005625A EP2405143B1 EP 2405143 B1 EP2405143 B1 EP 2405143B1 EP 11005625 A EP11005625 A EP 11005625A EP 2405143 B1 EP2405143 B1 EP 2405143B1
Authority
EP
European Patent Office
Prior art keywords
impeller
wall
impeller according
outlet
outlet opening
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.)
Active
Application number
EP11005625.6A
Other languages
German (de)
French (fr)
Other versions
EP2405143A3 (en
EP2405143A2 (en
Inventor
Holger Stark
Alfred J. Otto
Wolfgang Geier
Wolfgang Stößner
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 SE
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 SE filed Critical Wilo SE
Publication of EP2405143A2 publication Critical patent/EP2405143A2/en
Publication of EP2405143A3 publication Critical patent/EP2405143A3/en
Application granted granted Critical
Publication of EP2405143B1 publication Critical patent/EP2405143B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2238—Special flow patterns
    • F04D29/225—Channel wheels, e.g. one blade or one flow channel
    • 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
    • F04D29/2238—Special flow patterns

Definitions

  • the invention relates to an impeller of a centrifugal pump with a cup-shaped, coaxial with the impeller axis outer wall, closed by an end face and the opposite end face is open and forms the suction mouth. More particularly, the invention relates to an impeller of a pump for the disposal of industrial and municipal untreated raw sewage with lateral outlet channels on the impeller.
  • a major problem of the promoted media is the great risk of clogging by the partly long-fiber components contained in the medium.
  • an impeller of a centrifugal pump is known, which has two spirally expanding outwardly discharge channels.
  • Each of the channels is bounded by two axial outer walls and two radial side walls, wherein the corners are rounded in order to reduce the risk of clogging by langturaige components.
  • the rounding of the edges reduces the risk of clogging, such an outlet channel formed by two axial outer walls and two radial side walls results in a large contact surface with the medium to be transported, so that an increased risk of clogging exists solely through the tubular outlet channels.
  • the object of the invention is to improve an impeller of the type mentioned so that it is constipation-prone with high smoothness and large efficiency.
  • This impeller shape combines different characteristics of the previously different constructions. Due to the new design and the integrated changes in the suction mouth area, the characteristics of smoothness and clogging susceptibility with high efficiency are achieved.
  • the fiber particles Due to the cornerless and preferably cylindrical design, the fiber particles are given no opportunity to settle or hang, which is noticeable in the constipation un-susceptibility.
  • the slope also contributes to the constipation-susceptibility.
  • the impeller 1 of a centrifugal pump has a cylindrical, cup-shaped impeller body whose axis is coaxial with the impeller axis.
  • the cylindrical pot outer wall 2 of the Laufradtopfes is closed at one end face 3 and there forms a projecting lug 4 for attachment to the shaft of an electric motor, not shown.
  • the end face 3 opposite the second end face 4 is open and forms the suction mouth 5 of the impeller.
  • each groove is oblique to the impeller axis and is disposed below a passage opening 7 which is located in the pot outer wall 2 and the connection opening is in each case an outlet channel 8, which at the Outside the pot outer wall 2 is arranged.
  • the conveyed liquid is fed together with the solids specifically the passage openings 7 and the outlet channels 8.
  • the lower end of the groove 6 is further away from the associated outlet opening 12 than the upper end of the groove.
  • the up to ten grooves are located in the inflow region to the passage opening of the inflowing medium in a horizontal circular or cylindrical plane arranged below the passage opening.
  • Each of the two, diametrically opposite outlet channels 8 is formed by a channel outer wall 9 and two side walls 10 which terminate at an outlet opening 11 through which the delivered liquid emerges.
  • the outwardly spirally expanding channel outer wall is formed by a curved surface whose straight generatrices are parallel to the impeller axis and run along a curve whose radius is outward increases.
  • the side walls 10 are increasingly designed in width, wherein the side walls pass over a curvature in the channel outer wall 9.
  • the upper side wall of the outlet channel can drop both towards the outlet opening 12 and stand perpendicular to the axis of the impeller.
  • Each outlet channel 8 terminates in an outlet opening 12, whose outlet surface is arranged tangentially or at least substantially tangentially to the pot outer wall.
  • the outlet opening 12 has the shape of a trapezoid with two rounded outer corners, this trapezoidal shape is achieved in that the side walls 10 of the outlet channel 8 are arranged obliquely so that their distance A decreases with increasing distance from the cylindrical pot outer wall.
  • the lower side wall 10 from the inside outwards and the upper side wall 10 falls from inside to the outside.
  • the upper side wall of the outlet channel can drop both towards the outlet opening 12 and stand perpendicular to the axis of the impeller.
  • the passage opening 7 has one of the outlet openings 12 close to the impeller axis parallel inner edge 13, which is rounded and is formed by the pot outer wall 2.
  • the pot outer wall 2 is formed on its outer side decreasing, so that the outer edge 14 of the inner edge 13 is tapered decreasing, whereby the passage of the medium and the solids is facilitated.

Landscapes

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

Description

Die Erfindung betrifft ein Laufrad einer Kreiselpumpe mit einer topfförmigen, zur Laufradachse koaxialen Außenwand, von der eine Stirnseite geschlossen und die gegenüberliegende Stirnseite geöffnet ist und den Saugmund bildet. Die Erfindung betrifft insbesondere ein Laufrad einer Pumpe zum Entsorgen von industriellem und kommunalem ungereinigten Rohabwasser mit seitlichen Austrittskanälen am Laufrad.The invention relates to an impeller of a centrifugal pump with a cup-shaped, coaxial with the impeller axis outer wall, closed by an end face and the opposite end face is open and forms the suction mouth. More particularly, the invention relates to an impeller of a pump for the disposal of industrial and municipal untreated raw sewage with lateral outlet channels on the impeller.

Ein Hauptproblem der geförderten Medien besteht in der großen Verstopfungsgefahr durch die im Medium enthaltenen teils auch langfaserigen Bestandteile. Aus der Patentanmeldung US 2010/0047094 ist ein Laufrad einer Kreiselpumpe bekannt, das zwei spiralförmig sich nach außen hin erweiternde Austrittskanäle aufweist. Jeder der Kanäle ist dabei durch zwei axiale Außenwände und zwei radiale Seitenwände begrenzt, wobei die Ecken abgerundet sind, um eine Verstopfungsgefahr durch langfaserige Bestandteile zu reduzieren. Auch wenn die Abrundung der Kanten die Verstopfungsgefahr reduziert, führt ein derartiger durch zwei axiale Außenwände und zwei radiale Seitenwände gebildete Austrittskanal zu einer großen Kontaktfläche mit den zu befördernden Medium, so dass alleine durch die rohrförmigen Austrittskanäle eine erhöhte Verstopfungsgefahr vorliegt.A major problem of the promoted media is the great risk of clogging by the partly long-fiber components contained in the medium. From the patent application US 2010/0047094 an impeller of a centrifugal pump is known, which has two spirally expanding outwardly discharge channels. Each of the channels is bounded by two axial outer walls and two radial side walls, wherein the corners are rounded in order to reduce the risk of clogging by langfaserige components. Although the rounding of the edges reduces the risk of clogging, such an outlet channel formed by two axial outer walls and two radial side walls results in a large contact surface with the medium to be transported, so that an increased risk of clogging exists solely through the tubular outlet channels.

Aufgabe der Erfindung ist es, ein Laufrad der eingangs genannten Art so zu verbessern, dass es bei hoher Laufruhe und großem Wirkungsrad verstopfungsunanfällig ist.The object of the invention is to improve an impeller of the type mentioned so that it is constipation-prone with high smoothness and large efficiency.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass in der zylindrischen Außenwand mindestens zwei Durchtrittsöffnungen angeordnet sind, die jeweils von einem Austrittskanal überdeckt sind, und dass der Austrittskanal eine gekrümmte, sich nach außen insbesondere spiralförmig erweiternde flache Kanalaußenwand aufweist, die zusammen mit sich in Ausströmrichtung erweiternden Seitenwänden und einer Innenkante der Durchtrittsöffnung an ihrem Ende eine Austrittsöffnung bildet. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen aufgeführt.This object is achieved in that at least two passage openings are arranged in the cylindrical outer wall, which are each covered by an outlet channel, and that the outlet channel has a curved, outwardly in particular spirally expanding flat channel outer wall, which widen together with in the outflow direction Side walls and an inner edge of the passage opening forms an outlet opening at its end. Advantageous embodiments of the invention are listed in the subclaims.

Diese Laufradform vereint verschiedene Eigenschaften der bisher unterschiedlichen Konstruktionen. Durch die neue Bauform und die dabei integrierten Veränderungen im Saugmundbereich, werden die Eigenschaften von Laufruhe und Verstopfungsunanfälligkeit bei hohem Wirkungsgrad erreicht.This impeller shape combines different characteristics of the previously different constructions. Due to the new design and the integrated changes in the suction mouth area, the characteristics of smoothness and clogging susceptibility with high efficiency are achieved.

Durch den symmetrischen Aufbau und die im Saugmund angeordneten schrägen Zuführungskanäle bzw. Nuten werden Vibrationen vermieden, da sowohl Gewicht und Mediumfluss homogen verteilt sind und das Medium gezielt in die Kanäle geführt wird. Gleichzeitig können diese Pumpen aufgrund ihrer Laufruhe auch mit Motoren höherer Drehzahlen ausgestattet werden, was sich in den Investitionskosten positiv bemerkbar macht.Due to the symmetrical structure and the oblique feed channels or grooves arranged in the suction mouth, vibrations are avoided, since both the weight and the medium flow are homogeneously distributed and the medium is deliberately guided into the channels. At the same time these pumps can be equipped due to their smoothness with higher-speed motors, which makes a positive impact in the investment costs.

Durch die eckenlose und vorzugsweise zylindrische Bauform wird den Faserpartikeln keine Möglichkeit gegeben, sich festzusetzen oder anzuhängen, was sich in der Verstopfungsunanfälligkeit bemerkbar macht. Die Schräge trägt zusätzlich zur Verstopfungsunanfälligkeit bei.Due to the cornerless and preferably cylindrical design, the fiber particles are given no opportunity to settle or hang, which is noticeable in the constipation un-susceptibility. The slope also contributes to the constipation-susceptibility.

Gleiches gilt für die im Saugmund befindlichen schrägen Zulaufkanäle bzw. Nuten, die die Feststoffe gezielt den Austrittskanälen zuführen.The same applies to the oblique inlet channels or grooves in the suction mouth, which supply the solids specifically to the outlet channels.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im Folgenden näher beschrieben. Es zeigen

Fig. 1 bis 3
drei perspektivische Ansichten des Laufrades,
Fig. 4
einen axialen Schnitt durch das Laufrad,
Fig. 5
einen Schnitt nach B-B in Fig. 4,
Fig. 6
einen Schnitt nach A-A in Fig. 5.
An embodiment of the invention is illustrated in the drawings and will be described in more detail below. Show it
Fig. 1 to 3
three perspective views of the impeller,
Fig. 4
an axial section through the impeller,
Fig. 5
a cut to BB in Fig. 4 .
Fig. 6
a cut to AA in Fig. 5 ,

Das Laufrad 1 einer Kreiselpumpe weist einen zylindrischen, topfförmigen Laufradkörper auf, dessen Achse koaxial mit der Laufradachse ist. Die zylindrische Topfaußenwand 2 des Laufradtopfes ist an einer Stirnseite 3 geschlossen und bildet dort einen vorstehenden Ansatz 4 zum Befestigen an der Welle eines nicht dargestellten Elektromotors. Die der Stirnseite 3 gegenüberliegende zweite Stirnseite 4 ist offen und bildet den Saugmund 5 des Laufrades.The impeller 1 of a centrifugal pump has a cylindrical, cup-shaped impeller body whose axis is coaxial with the impeller axis. The cylindrical pot outer wall 2 of the Laufradtopfes is closed at one end face 3 and there forms a projecting lug 4 for attachment to the shaft of an electric motor, not shown. The end face 3 opposite the second end face 4 is open and forms the suction mouth 5 of the impeller.

In der Innenwand des Saugmunds 5 sind Kanäle bzw. Nuten 6 eingebracht, wobei jede Nut schräg zur Laufradachse liegt und jeweils unterhalb einer Durchtrittsöffnung 7 angeordnet ist, die sich in der Topfaußenwand 2 befindet und die Verbindungsöffnung darstellt zu jeweils einem Austrittskanal 8, der an der Außenseite der Topfaußenwand 2 angeordnet ist. Durch die Nuten 6 bzw. die schrägen Zulaufkanäle 6 wird die geförderte Flüssigkeit zusammen mit den Feststoffen gezielt den Durchtrittsöffnungen 7 und den Austrittskanälen 8 zugeführt. Hierbei ist das untere Ende der Nut 6 weiter von der dazugehörigen Austrittsöffnung 12 entfernt ist als das obere Ende der Nut. Die bis zu zehn Nuten liegen im Anströmungsbereich zu der Durchtrittsöffnung des zufließenden Mediums in einer unterhalb der Durchtrittsöffnung angeordneten, horizontal kreisrunden oder zylindrischen Ebene.In the inner wall of the suction mouth 5 channels or grooves 6 are introduced, each groove is oblique to the impeller axis and is disposed below a passage opening 7 which is located in the pot outer wall 2 and the connection opening is in each case an outlet channel 8, which at the Outside the pot outer wall 2 is arranged. Through the grooves 6 and the oblique inlet channels 6, the conveyed liquid is fed together with the solids specifically the passage openings 7 and the outlet channels 8. Here, the lower end of the groove 6 is further away from the associated outlet opening 12 than the upper end of the groove. The up to ten grooves are located in the inflow region to the passage opening of the inflowing medium in a horizontal circular or cylindrical plane arranged below the passage opening.

Jeder der beiden, einander diametral gegenüberliegenden Austrittskanäle 8 ist von einer Kanalaußenwand 9 und zwei Seitenwänden 10 gebildet, die an einer Austrittsöffnung 11 enden, durch die die geförderte Flüssigkeit austritt. Hierbei wird die sich nach außen spiralförmig erweiternde Kanalaußenwand von einer gekrümmten Fläche gebildet, deren gerade Erzeugenden parallel zur Laufradachse liegen und längs einer Kurve verlaufen, deren Radius nach außen hin zunimmt. Entsprechend dieser Außenwandform sind die Seitenwände 10 in ihrer Breite zunehmend gestaltet, wobei die Seitenwände über eine Krümmung in die Kanalaußenwand 9 übergehen. Hierbei ist auch von Bedeutung, dass bei senkrechter Laufradachse und unten angeordnetem Saugmund die untere Seitenwand 10 sowohl zur Austrittsöffnung 12 als auch radial nach außen hin ansteigt.Each of the two, diametrically opposite outlet channels 8 is formed by a channel outer wall 9 and two side walls 10 which terminate at an outlet opening 11 through which the delivered liquid emerges. In this case, the outwardly spirally expanding channel outer wall is formed by a curved surface whose straight generatrices are parallel to the impeller axis and run along a curve whose radius is outward increases. According to this outer wall shape, the side walls 10 are increasingly designed in width, wherein the side walls pass over a curvature in the channel outer wall 9. In this context, it is also important that with the vertical impeller axis and the suction mouth arranged at the bottom, the lower side wall 10 rises both towards the outlet opening 12 and also radially outward.

Die obere Seitenwand des Austrittskanals kann sowohl zur Austrittsöffnung 12 hin abfallen als auch senkrecht zur Achse des Laufrades stehen.The upper side wall of the outlet channel can drop both towards the outlet opening 12 and stand perpendicular to the axis of the impeller.

Jeder Austrittskanal 8 endet in einer Austrittsöffnung 12, deren Austrittsfläche tangential oder zumindest im Wesentlichen tangential zur Topfaußenwand angeordnet ist. Hierbei besitzt die Austrittsöffnung 12 die Form eines Trapezes mit zwei abgerundeten äußeren Ecken, wobei diese Trapezform dadurch zustande kommt, dass die Seitenwände 10 des Austrittskanals 8 derart schräg angeordnet sind, dass ihr Abstand A voneinander mit wachsender Entfernung von der zylindrischen Topfaußenwand abnimmt. Damit steigt in den in Fig. 1 bis 3 dargestellten Abbildungen die untere Seitenwand 10 von innen nach außen hin an und die obere Seitenwand 10 fällt von innen nach außen gesehen ab. Hierbei ist auch von Bedeutung, dass bei senkrechter Laufradachse und unten angeordnetem Saugmund die untere Seitenwand 10 sowohl zur Austrittsöffnung 12 als auch radial nach außen hin ansteigt.Each outlet channel 8 terminates in an outlet opening 12, whose outlet surface is arranged tangentially or at least substantially tangentially to the pot outer wall. Here, the outlet opening 12 has the shape of a trapezoid with two rounded outer corners, this trapezoidal shape is achieved in that the side walls 10 of the outlet channel 8 are arranged obliquely so that their distance A decreases with increasing distance from the cylindrical pot outer wall. This increases in the in Fig. 1 to 3 Illustrated figures, the lower side wall 10 from the inside outwards and the upper side wall 10 falls from inside to the outside. In this context, it is also important that with the vertical impeller axis and the suction mouth arranged at the bottom, the lower side wall 10 rises both towards the outlet opening 12 and also radially outward.

Die obere Seitenwand des Austrittskanals kann sowohl zur Austrittsöffnung 12 hin abfallen als auch senkrecht zur Achse des Laufrades stehen.The upper side wall of the outlet channel can drop both towards the outlet opening 12 and stand perpendicular to the axis of the impeller.

Die Durchtrittsöffnung 7 besitzt eine der Austrittsöffnungen 12 nahe zur Laufradachse parallele Innenkante 13, die abgerundet ist und von der Topfaußenwand 2 gebildet wird. An dieser Innenkante 13 ist die Topfaußenwand 2 an ihrer Außenseite abnehmend gebildet, so dass der Außenrand 14 der Innenkante 13 abnehmend abgeschrägt ist, wodurch der Durchtritt des Mediums und der Feststoffe erleichtert wird.The passage opening 7 has one of the outlet openings 12 close to the impeller axis parallel inner edge 13, which is rounded and is formed by the pot outer wall 2. At this inner edge 13, the pot outer wall 2 is formed on its outer side decreasing, so that the outer edge 14 of the inner edge 13 is tapered decreasing, whereby the passage of the medium and the solids is facilitated.

Claims (15)

  1. Impeller (1) of a centrifugal pump, having a pot-shaped outer wall (2) which is coaxial with the impeller axis and of which one end side (3) is closed and the opposite end side is open and forms the suction mouth (5), wherein, in the cylindrical outer wall (2), there are arranged at least two passage openings (7), each of which is covered by an outlet duct (8), and wherein the outlet duct (8) has a curved and outwardly, in particular helically, widening flat duct outer wall (9), characterized in that the outwardly widening flat duct wall forms together with side walls (10), widening in an outflow direction, and an inner edge (13) of the passage opening (7) at the end thereof an outlet opening (12).
  2. Impeller according to Claim 1, characterized in that the outlet opening (12) has the form of a trapezium with two rounded outer corners.
  3. Impeller according to Claim 1 or 2, characterized in that the inner edge (13) of each outlet opening (12) is situated within the cylindrical pot outer wall (2).
  4. Impeller according to Claim 3, characterized in that the outer boundary (14) of the inner edge (13) of the outlet opening (12) is tapered towards the inner edge.
  5. Impeller according to one of the preceding claims, characterized in that the two side walls (10) of the outlet duct (8) are arranged obliquely in such a way that the distance (A) between them decreases with increasing distance from the cylindrical pot outer wall (2).
  6. Impeller according to one of the preceding claims, characterized in that, with a vertical impeller axis and a suction mouth arranged at the bottom, the lower side wall (10) rises both towards the outlet opening (12) and radially outwardly.
  7. Impeller according to one of the preceding claims, characterized in that the upper side wall of the outlet duct falls towards the outlet opening.
  8. Impeller according to one of the preceding claims, characterized in that the outlet opening (12) is arranged in a manner substantially tangential to the pot outer wall (2).
  9. Impeller according to one of the preceding claims, characterized in that the inner wall of the suction mouth (5) has at least one groove (6) which is oblique with respect to the impeller axis, in order to achieve swirling of the incoming flow.
  10. Impeller according to Claim 9, characterized in that the groove (6) is arranged below the passage opening (7) .
  11. Impeller according to Claim 9 or 10, characterized in that the lower end of the groove (6) is further away from the associated outlet opening (12) than the upper end of the groove.
  12. Impeller according to one of the preceding claims, characterized in that the duct outer wall (9) is a curved surface with a straight generator which is parallel to the impeller axis and which progresses along a curve, in particular a helical curve.
  13. Impeller according to one of the preceding claims, characterized in that it has two or four mutually diametrically opposite outlet ducts.
  14. Impeller according to one of Claims 1 to 12, characterized in that two, three or four outlet ducts (8) are arranged on the outer side of the pot-shaped impeller body.
  15. Use of an impeller (1) according to one of the preceding claims, for conveying untreated industrial and/or communal wastewater.
EP11005625.6A 2010-07-09 2011-07-08 Centrifugal pump impeller Active EP2405143B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010026756A DE102010026756B4 (en) 2010-07-09 2010-07-09 Impeller of a centrifugal pump

Publications (3)

Publication Number Publication Date
EP2405143A2 EP2405143A2 (en) 2012-01-11
EP2405143A3 EP2405143A3 (en) 2015-01-14
EP2405143B1 true EP2405143B1 (en) 2019-08-28

Family

ID=44343689

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11005625.6A Active EP2405143B1 (en) 2010-07-09 2011-07-08 Centrifugal pump impeller

Country Status (2)

Country Link
EP (1) EP2405143B1 (en)
DE (1) DE102010026756B4 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR742839A (en) * 1933-03-17
CH94909A (en) * 1921-05-21 1922-06-01 Peter Alfred Channelless centrifugal pump, especially for pumping impure liquids with different specific weights.
US2432247A (en) * 1944-11-03 1947-12-09 Lee V Mcanallen Pump
US3134331A (en) * 1963-04-19 1964-05-26 George T Adams Reversible self-priming pump
DE2844990C2 (en) * 1978-10-16 1984-01-26 Wojewódzkie Przedsiębiorstwo Gospodarki Komunalnej i Mieszkaniowej, Piła Centrifugal pump
DE3615686A1 (en) * 1986-05-09 1987-11-12 Klein Schanzlin & Becker Ag CHANNEL WHEEL FOR CENTRIFUGAL PUMPS
BRPI0802897A2 (en) * 2008-08-19 2011-04-26 Higra Ind Ltda modular pumps

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2405143A3 (en) 2015-01-14
DE102010026756B4 (en) 2012-10-25
DE102010026756A1 (en) 2012-01-12
EP2405143A2 (en) 2012-01-11

Similar Documents

Publication Publication Date Title
EP2495444B1 (en) Pump
EP2188532B1 (en) Pump rotor and pump comprising a pump rotor of said type
EP3140548B1 (en) Impeller for regenerative pump
DE102012216196A1 (en) pump
EP2674092A1 (en) Pump and method for producing an impeller for a pump
DE1403836B1 (en) Valveless two-way centrifugal pump
EP2643596A1 (en) Self-cleaning cover plate in a pump with radial flow
EP2932105A2 (en) Pump device comprising a flow guiding element
EP3303845B1 (en) Self-priming pump assembly
EP2405143B1 (en) Centrifugal pump impeller
EP2660473A1 (en) Waste water pump
EP2863129A1 (en) Extraction device, in particular steam extractor
EP3273066B1 (en) Blower wheel
EP2138723B1 (en) Centrifugal pump with free flow wheel
EP1131560B1 (en) Side channel pump
DE4239071C2 (en) Submersible pump unit
EP1583910B1 (en) Non-chokable pump
EP2776722B1 (en) Centrifugal pump for delivering liquids in a motor vehicle
DE102010004379A1 (en) Fuel pump
CH189936A (en) Centrifugal pump for pumping liquid manure, sludge water and the like.
WO2013060754A2 (en) Liquid ring compressor
EP1423613B1 (en) Supply pump
DE102013200280A1 (en) impeller
DE102012222336B4 (en) flow machine
EP0250973B1 (en) Centrifugal pump

Legal Events

Date Code Title Description
AK Designated contracting states

Kind code of ref document: A2

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

AX Request for extension of the european patent

Extension state: BA ME

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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

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

AX Request for extension of the european patent

Extension state: BA ME

RIC1 Information provided on ipc code assigned before grant

Ipc: F04D 29/22 20060101AFI20141205BHEP

17P Request for examination filed

Effective date: 20150529

RBV Designated contracting states (corrected)

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

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

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20181010

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20190408

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

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

Ref legal event code: REF

Ref document number: 1172750

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190915

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502011016036

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PK

Free format text: BERICHTIGUNGEN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R083

Ref document number: 502011016036

Country of ref document: DE

RIN2 Information on inventor provided after grant (corrected)

Inventor name: STARK, HOLGER

Inventor name: STROESSNER, WOLFGANG

Inventor name: GEIER, WOLFGANG

Inventor name: OTTO, ALFRED, J.

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20190828

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

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

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: 20191230

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: 20190828

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: 20190828

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: 20190828

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: 20191128

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: 20191128

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: 20190828

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: 20190828

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

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: 20191228

Ref country code: RS

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: 20190828

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: 20191129

Ref country code: AL

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: 20190828

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: 20190828

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: 20190828

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: 20190828

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

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: 20190828

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: 20190828

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: 20190828

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: 20190828

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

Ref country code: SM

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: 20190828

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: 20190828

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: 20190828

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: 20200224

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502011016036

Country of ref document: DE

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

PG2D Information on lapse in contracting state deleted

Ref country code: IS

26N No opposition filed

Effective date: 20200603

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: 20190828

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

Ref country code: MC

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: 20190828

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200731

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: 20200731

Ref country code: CH

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

Effective date: 20200731

Ref country code: LU

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

Effective date: 20200708

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: 20200731

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

Ref country code: IE

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

Effective date: 20200708

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1172750

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200708

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: 20200708

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: 20190828

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: 20190828

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

Ref country code: MK

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: 20190828

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

Effective date: 20230615

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

Ref country code: IT

Payment date: 20230620

Year of fee payment: 13

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

Ref country code: DE

Payment date: 20230620

Year of fee payment: 13

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

Ref country code: GB

Payment date: 20240620

Year of fee payment: 14

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

Ref country code: FR

Payment date: 20240619

Year of fee payment: 14