EP0464355B1 - Duplex centrifugal pump - Google Patents

Duplex centrifugal pump Download PDF

Info

Publication number
EP0464355B1
EP0464355B1 EP91108395A EP91108395A EP0464355B1 EP 0464355 B1 EP0464355 B1 EP 0464355B1 EP 91108395 A EP91108395 A EP 91108395A EP 91108395 A EP91108395 A EP 91108395A EP 0464355 B1 EP0464355 B1 EP 0464355B1
Authority
EP
European Patent Office
Prior art keywords
insert
side wall
centrifugal pump
flat side
outlet
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
EP91108395A
Other languages
German (de)
French (fr)
Other versions
EP0464355A2 (en
EP0464355A3 (en
Inventor
Günter Strelow
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 GmbH
Original Assignee
Wilo GmbH
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 GmbH filed Critical Wilo GmbH
Priority to AT91108395T priority Critical patent/ATE98000T1/en
Publication of EP0464355A2 publication Critical patent/EP0464355A2/en
Publication of EP0464355A3 publication Critical patent/EP0464355A3/en
Application granted granted Critical
Publication of EP0464355B1 publication Critical patent/EP0464355B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0072—Installation or systems with two or more pumps, wherein the flow path through the stages can be changed, e.g. series-parallel
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • 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
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/912—Interchangeable parts to vary pumping capacity or size of pump

Definitions

  • the invention relates to a double centrifugal pump with two pump impellers mounted in a housing and two parallel electric motors arranged next to one another, the pump housing having a flat side wall in which the inlet and outlet lie, and the pump housing with this flat side wall on a second device, in particular a consumer device is fixed, and an insert releasably lies in the pump housing, which insert can be inserted through a large opening in the flat side wall and forms inlet and outlet as well as inner connecting channels.
  • Double pumps are known which are used for parallel operation, series operation, separate operation, with the possibility of the rotation of the conveying direction and also with a switchover function. For each of these applications, it is necessary to provide an independent construction.
  • German Offenlegungsschrift 3624917 to insert an insert in a centrifugal pump into the pump housing, which forms the inlet and outlet, as well as the spirally widening outlet channel.
  • the object of the invention is to provide a double centrifugal pump which can be used for the various valve applications in a simple construction and small construction by making minor changes while maintaining the pump housing.
  • shut-off device in particular an envelope flap or a check valve, is arranged in use.
  • the insert forms a spirally widening outlet channel for each impeller.
  • the insert should also form at least part of the flat side wall. It is particularly advantageous that the insert forms the connection surfaces for the inlet and outlet.
  • the insert is particularly inexpensive to manufacture if it is made of plastic. It is of the greatest advantage if the opening in the flat side wall is circular for use and merges into a cylindrical interior of the pump housing.
  • the double pump has two canned pumps and can be used as a hot water pump, especially in heating systems.
  • the pump 1 has a pump housing 2, in particular made of plastic or metal, in which two impellers are arranged axially parallel and in which a tubular inlet is formed axially. Around each of the impellers there is a spiral outlet duct.
  • the housing 2 is in the form of a circular disk, the height H of the cylindrical outer wall being substantially less than the diameter D of the circular flat, flat pump side wall. 6.
  • the openings 4, 7 and 8 are located in the plane of the side wall 6.
  • two canned electric motors 9 are attached coaxially to the impellers.
  • the pump housing 2 has an inner insert 3, which closely surrounds the impellers and forms the spirally widening outlet channels around the impellers, and an outer housing 11 surrounding the insert 3, which is fastened to the electric motors 9 and carries seals 13, which in the Level of the side wall 6 lie.
  • the insert 3 thus forms, together with the edge of the housing, the flat interface to the consumption or connection devices. It is particularly advantageous that the opening 5 in the flat side wall 6 for the insert 3 is circular and merges into a cylindrical interior 2a of the pump housing.
  • the outer housing 11 which acts as a pressure vessel, forms flanges 12 parallel to the side wall 6, which have bores 14 in order to be able to accommodate screws. With these screws, not shown, the outer housing 11 and thus the entire pump can be attached to consumption devices. Impellers 3 and inserts 3 of different powers and designs can be inserted into this outer housing 11.
  • the impellers be replaced by differently shaped impellers, but also the spiral channels surrounding the impellers and the inlet can be adapted to the respective impellers and the desired power as well as to the respective speed range be.
  • the inlet and outlet openings 4, 7, 8 located in the insert 3 can be adapted to the conditions of the consumption or connection devices in terms of their spacing from one another and also in their arrangement in the flat side wall 6. It is sufficient to change insert 3. to meet the requirements.
  • the channels can be shaped differently in the insert 3, and can also be arranged. Envelope flaps or check valves must be attached (stored) that correspond to the respective application.
  • the inner insert 3 can be made smaller than shown in the figures. It may be sufficient if it only forms the inlet opening 7 and the diffuser for the impeller.
  • the insert 3 can also consist of several parts. It is particularly easy to manufacture if it is made of plastic. In particular, this makes it possible and economically justifiable to include differently shaped inserts in the pump, so that the user can change the pump function or performance before installation.

Landscapes

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

Abstract

The invention relates to a duplex centrifugal pump with two impellers supported in a housing and two electric motors arranged side by side in parallel, - the pump housing having a plane side wall containing the inlet and outlet, - the pump housing being fixed by this flat side wall to a second device, in particular a consuming device, - an insert being detachably enclosed in the pump housing which can be slid in through a large aperture in the flat side wall and forms the inlet and outlet as well as internal connecting ducts and - one or more shut-off elements, particularly reversing valves or non- return valves, being arranged in the insert. <IMAGE>

Description

Die Erfindung betrifft eine Doppel-Kreiselpumpe mit zwei in einem Gehäuse gelagerten Pumpenlaufrädern und zwei parallele nebeneinander angeordnete Elektromotoren, wobei das Pumpengehäuse eine ebene Seitenwand aufweist, in der Ein- und Auslaß liegen, das Pumpengehäuse mit dieser flachen Seitenwand an einer zweiten Vorrichtung insbesondere einer Verbrauchsvorrichtung befestigt ist, und im Pumpengehäuse ein Einsatz lösbar einliegt, der durch eine große Öffnung der flachen Seitenwand einschiebbar ist und Ein- und Auslaß als auch innere Verbindungskanäle bildet.The invention relates to a double centrifugal pump with two pump impellers mounted in a housing and two parallel electric motors arranged next to one another, the pump housing having a flat side wall in which the inlet and outlet lie, and the pump housing with this flat side wall on a second device, in particular a consumer device is fixed, and an insert releasably lies in the pump housing, which insert can be inserted through a large opening in the flat side wall and forms inlet and outlet as well as inner connecting channels.

Es sind Doppelpumpen bekannt, die für Parallelbetrieb, Reihenbetrieb, getrennten Betrieb, mit der Möglichkeit, der Umdrehung der Förderrichtung, als auch mit Umschaltfunktion, eingesetzt werden. Für jeden dieser Anwendungsfälle ist es erforderlich, eine eigenständige Konstruktion vorzusehen.Double pumps are known which are used for parallel operation, series operation, separate operation, with the possibility of the rotation of the conveying direction and also with a switchover function. For each of these applications, it is necessary to provide an independent construction.

Darüber hinaus ist aus der deutschen Offenlegungsschrift 3624917 bekannt, bei einer Kreiselpumpe in das Pumpengehäuse einen Einsatz einzubringen, der Ein- und Auslaß, als auch den sich spiralförmig erweiternden Auslaßkanal bildet.In addition, it is known from German Offenlegungsschrift 3624917 to insert an insert in a centrifugal pump into the pump housing, which forms the inlet and outlet, as well as the spirally widening outlet channel.

Aufgabe der Erfindung ist es, eine Doppel-Kreiselpumpe zu schaffen, die bei einfacher Konstruktion und kleiner Bauweise durch geringe Veränderungen, unter Beibehaltung des Pumpengehäuses, für die verschiedenen Ventil-Anwendungsfälle einsetzbar ist.The object of the invention is to provide a double centrifugal pump which can be used for the various valve applications in a simple construction and small construction by making minor changes while maintaining the pump housing.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß im Einsatz ein Absperrorgan insbesondere eine Umschlagklappe oder ein Rückschlagventil angeordnet ist.This object is achieved in that a shut-off device, in particular an envelope flap or a check valve, is arranged in use.

Bei einer solchen Pumpe braucht nur der Einsatz an die verschiedenen Anwendungsfälle angepaßt zu sein, da der Einsatz sowohl die Verbindungswege, als auch das jeweilige Absperrorgan, d.h. z.B. die jeweilige erforderliche Umschlagklappe oder das Rückschlagventil, in der erforderlichen Bau- und Anschlußweise enthält. Der Einsatz ist über die Öffnung in der flachen Seitenwand leicht erreichbar und auswechselbar und die Abmessungen des Anschlußflansches des Pumpengehäuses bleiben gleich.With such a pump, only the use needs to be adapted to the various applications, since the use of both the connecting paths and the respective shut-off device, i.e. e.g. contains the respective required flap or check valve in the required construction and connection method. The insert is easily accessible and exchangeable through the opening in the flat side wall and the dimensions of the connecting flange of the pump housing remain the same.

Besonders vorteilhaft ist es, wenn der Einsatz für jedes Laufrad jeweils einen sich spiralförmig erweiternden Auslaßkanal bildet. Auch sollte der Einsatz zumindest einen Teil der flachen Seitenwand bilden. Besonders vorteilhaft ist es, daß der Einsatz die Anschlußflächen für den Ein- und Auslaß bildet.It is particularly advantageous if the insert forms a spirally widening outlet channel for each impeller. The insert should also form at least part of the flat side wall. It is particularly advantageous that the insert forms the connection surfaces for the inlet and outlet.

Besonders preiswert ist der Einsatz herstellbar, wenn er aus Kunststoff besteht. Von größtem Vorteil ist es, wenn die Öffnung in der flachen Seitenwand für den Einsatz kreisförmig ist und in einen zylindrischen Innenraum des Pumpengehäuses übergeht.The insert is particularly inexpensive to manufacture if it is made of plastic. It is of the greatest advantage if the opening in the flat side wall is circular for use and merges into a cylindrical interior of the pump housing.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen:

Fig. 1
eine Seitenansicht der Pumpe auf die flache Seitenwand und
Fig. 2
einen axialen Schnitt durch die Pumpe bei nicht geschnittenem Motor,
Fig. 3
verschieden Anwendungsfälle der erfindungsgemäßen Pumpe.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it:
Fig. 1
a side view of the pump on the flat side wall and
Fig. 2
an axial section through the pump with the motor not cut,
Fig. 3
different applications of the pump according to the invention.

Die Doppelpumpe weist zwei Spaltrohrpumpen auf und kann als Warmwasserpumpe, insbesondere in Heizungsanlagen eingesetzt werden. Die Pumpe 1 besitzt ein Pumpengehäuse 2, insbesondere aus Kunststoff oder Metall, in dem zwei Laufräder achsparallel angeordnet sind und in dem ein rohrförmiger Einlaß achsial eingeformt ist. Um die Laufräder herum befindet sich jeweils ein sich spiralfärmig erweiternder Auslaßkanal. Das Gehäuse 2 ist kreisscheibenförmig, wobei die Höhe H der zylindrischen Außenwand wesentlich geringer ist als der Durchmesser D der kreisförmigen ebenen, flachen Pumpenseitenwand. 6.The double pump has two canned pumps and can be used as a hot water pump, especially in heating systems. The pump 1 has a pump housing 2, in particular made of plastic or metal, in which two impellers are arranged axially parallel and in which a tubular inlet is formed axially. Around each of the impellers there is a spiral outlet duct. The housing 2 is in the form of a circular disk, the height H of the cylindrical outer wall being substantially less than the diameter D of the circular flat, flat pump side wall. 6.

In der Seitenwand 6 münden die Einlässe 7 und 8 mit den Einlaßöffnungen 7, 8 und der Auslaßkanal mit einer Auslaßöffnung 4. Die Öffnungen 4, 7 und 8 befinden sich in der Ebene der Seitenwand 6. Auf der der Seitenwand 6 gegenüberliegenden Seite des Pumpengehäuses 2 sind zwei Spaltrohr-Elektromotoren 9 koaxial zu den Laufrädern befestigt.The inlets 7 and 8 with the inlet openings 7, 8 and the outlet channel with an outlet opening 4 open into the side wall 6. The openings 4, 7 and 8 are located in the plane of the side wall 6. On the side of the pump housing 2 opposite the side wall 6 two canned electric motors 9 are attached coaxially to the impellers.

Das Pumpengehäuse 2 besitzt einen inneren Einsatz 3, der die Laufräder eng umgibt und die spiralförmig erweiternde Auslaßkanäle um die Laufräder herum bildet, und einen den Einsatz 3 umgebendes Außengehäuse 11, das an den Elektromotoren 9 befestigt ist und das Dichtungen 13 trägt, die in der Ebene der Seitenwand 6 liegen. Der Einsatz 3 bildet somit zusammen mit dem Gehäuserand die ebene Schnittstelle zu den Verbrauchs- oder Anschlußvorrichtungen. Besonders vorteilhaft ist es, daß die Öffnung 5 in der flachen Seitenwand 6 für den Einsatz 3 kreisförmig ist und in einen zylindrischen Innenraum 2a des Pumpengehäuses übergeht.The pump housing 2 has an inner insert 3, which closely surrounds the impellers and forms the spirally widening outlet channels around the impellers, and an outer housing 11 surrounding the insert 3, which is fastened to the electric motors 9 and carries seals 13, which in the Level of the side wall 6 lie. The insert 3 thus forms, together with the edge of the housing, the flat interface to the consumption or connection devices. It is particularly advantageous that the opening 5 in the flat side wall 6 for the insert 3 is circular and merges into a cylindrical interior 2a of the pump housing.

Das als Druckbehälter wirkende Außengehäuse 11 bildet parallel zur Seitenwand 6 Flansche 12 aus, die Bohrungen 14 besitzen, um Schrauben aufnehmen zu können. Mit diesen nicht dargestellten Schrauben ist das Außengehäuse 11 und damit die gesamte Pumpe an Verbrauchsvorrichtungen befestigbar. In dieses Außengehäuse 11 können Laufräder 3 und Einsätze 3 unterschiedlicher Leistungen und Bauweisen eingeschoben werden.The outer housing 11, which acts as a pressure vessel, forms flanges 12 parallel to the side wall 6, which have bores 14 in order to be able to accommodate screws. With these screws, not shown, the outer housing 11 and thus the entire pump can be attached to consumption devices. Impellers 3 and inserts 3 of different powers and designs can be inserted into this outer housing 11.

Hierzu können nicht nur die Laufräder durch unterschiedlich geformte Laufräder ersetzt werden, sondern es können auch die Laufräder umgebenden spiralförmigen Kanäle als auch der Einlaß an die jeweiligen Laufräder und die gewünschte Leistung als auch an den jeweiligen Drehzahlbereich angepaßt sein. Ferner können die im Einsatz 3 befindlichen Einlaß- und Auslaßöffnungen 4, 7, 8 in ihrem Abstand zueinander, als auch in ihrer Anordnung in der ebenen Seitenwand 6, an die Gegebenheiten der Verbrauchs- oder Anschlußvorrichtungen angepaßt sein. Es genügt, den Einsatz 3 zu wechseln. um den gestellten Anforderungen gerecht zu werden.For this purpose, not only can the impellers be replaced by differently shaped impellers, but also the spiral channels surrounding the impellers and the inlet can be adapted to the respective impellers and the desired power as well as to the respective speed range be. Furthermore, the inlet and outlet openings 4, 7, 8 located in the insert 3 can be adapted to the conditions of the consumption or connection devices in terms of their spacing from one another and also in their arrangement in the flat side wall 6. It is sufficient to change insert 3. to meet the requirements.

Die Kanäle können im Einsatz 3 unterschiedlich geformt, als auch angeordnet sein Asperrorgane 4 z.b. Umschlagklappen oder Rückschlagventile befestigt (gelagert) sein, die dem jeweiligen Einsatzzweck entsprechen.The channels can be shaped differently in the insert 3, and can also be arranged. Envelope flaps or check valves must be attached (stored) that correspond to the respective application.

Der innere Einsatz 3 kann kleiner als in den Figuren dargestellt ausgeführt sein. Es kann ausreichen, wenn er nur die Einlaßöffnung 7 und den Leitapparat für das Laufrad bildet. Der Einsatz 3 kann auch aus mehreren Teilen bestehen. Besonders einfach in der Herstellung ist er dann, wenn er aus Kunststoff besteht. Insbesondere hierdurch wird es möglich und wirtschaftlich vertretbar, der Pumpe verschieden geformte Einsätze beizulegen, so daß der Anwender vor dem Einbau die Pumpenfunktion oder -leistung ändern kann.The inner insert 3 can be made smaller than shown in the figures. It may be sufficient if it only forms the inlet opening 7 and the diffuser for the impeller. The insert 3 can also consist of several parts. It is particularly easy to manufacture if it is made of plastic. In particular, this makes it possible and economically justifiable to include differently shaped inserts in the pump, so that the user can change the pump function or performance before installation.

Claims (6)

  1. A double centrifugal pump having two pump rotors mounted in a casing (2) and two electric motors disposed in parallel one beside the other, wherein the pump casing (2, 11) has a flat side wall (6) in which inlet and outlet (4, 7, 8) are disposed, the pump casing (2, 11) is attached by said flat side wall (6) to a second device, more particularly a utility device, and releasably inserted in the pump casing (2, 11) is an insert (3) which can be slid through a large aperture (5) in the flat side wall (6) and forms inlet and outlet (4, 7, 8) and also inner connecting channels, characterized in that one or more shutoff members (4), more particularly changeover valves or non-return valves are disposed in the insert (3).
  2. A double centrifugal pump according to claim 1, characterized in that the insert (3) forms a spirally widening outlet channel for each rotor.
  3. A double centrifugal pump according to claims 1 or 2, characterized in that the insert (3) forms at least a part of the flat side wall (6).
  4. A double centrifugal pump according to one of the preceding claims, characterized in that the inserts (3) forms the connecting surfaces for the inlet and outlet (4, 7, 8).
  5. A double centrifugal pump according to one of the preceding claims, characterized in that the insert (3) is made of plastics.
  6. A double centrifugal pump according to one of the preceding claims, characterized in that the aperture (5) in the flat side wall (6) for the insert (3) is circular and merges into a cylindrical inner space (2a) of the pump casing.
EP91108395A 1990-07-06 1991-05-24 Duplex centrifugal pump Expired - Lifetime EP0464355B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91108395T ATE98000T1 (en) 1990-07-06 1991-05-24 DOUBLE CENTRIFUGAL PUMP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4021410A DE4021410A1 (en) 1990-07-06 1990-07-06 DOUBLE CENTRIFUGAL PUMP
DE4021410 1990-07-06

Publications (3)

Publication Number Publication Date
EP0464355A2 EP0464355A2 (en) 1992-01-08
EP0464355A3 EP0464355A3 (en) 1992-02-26
EP0464355B1 true EP0464355B1 (en) 1993-12-01

Family

ID=6409706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108395A Expired - Lifetime EP0464355B1 (en) 1990-07-06 1991-05-24 Duplex centrifugal pump

Country Status (6)

Country Link
US (1) US5178520A (en)
EP (1) EP0464355B1 (en)
KR (1) KR970007394B1 (en)
AT (1) ATE98000T1 (en)
DE (2) DE4021410A1 (en)
ES (1) ES2046823T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD834068S1 (en) 2017-01-27 2018-11-20 S.A. Armstrong Limited Control pump
US11732719B2 (en) 2017-01-27 2023-08-22 S.A. Armstrong Limited Dual body variable duty performance optimizing pump unit

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5474431A (en) * 1993-11-16 1995-12-12 Copeland Corporation Scroll machine having discharge port inserts
DE4403697A1 (en) * 1994-02-07 1995-08-10 Wilo Gmbh Double pump
DE19511027A1 (en) * 1995-03-28 1996-10-02 Wilo Gmbh Centrifugal pump with ventilation
DE19702477B4 (en) * 1997-01-24 2006-02-02 Wilo Ag double pump
EP1079113B1 (en) * 1999-08-21 2004-10-13 Grundfos A/S Centrifugal pump casing for a circulating pump for two fluid circuits
US6543243B2 (en) 2001-06-21 2003-04-08 Visteon Global Technologies, Inc. Hybrid compressor
AU2003200332B2 (en) * 2002-02-08 2005-11-17 Sanden Corporation Hybrid compressor
FR2893092B1 (en) * 2005-11-08 2008-10-10 Koyo Hpi Soc Par Actions Simpl ELECTRO-PUMP GROUP, OF THE TYPE COMPRISING AT LEAST ONE HYDRAULIC PUMP, IN PARTICULAR A GEAR, DRIVEN IN ROTATION BY A MOTOR DEVICE
US7507066B2 (en) * 2006-03-27 2009-03-24 Koenig Kevin J Pump header body and modular manifold
DE102011116957A1 (en) * 2011-10-26 2013-05-02 Vaillant Gmbh Multiple coaxial pump
DE102012204212B4 (en) * 2012-03-16 2024-02-29 Mahle International Gmbh Pump module with a housing
US9562534B2 (en) 2012-05-04 2017-02-07 Ghsp, Inc. In-line dual pump and motor with control device
US9115720B2 (en) 2012-05-04 2015-08-25 Ghsp, Inc. Dual pump and motor with control device
US9752590B2 (en) * 2013-03-13 2017-09-05 Ghsp, Inc. Two pump design with coplanar interface surface
US9739284B2 (en) * 2013-11-19 2017-08-22 Charles Wayne Zimmerman Two piece impeller centrifugal pump
US10087927B2 (en) 2014-05-01 2018-10-02 Ghsp, Inc. Electric motor with flux collector
US11015585B2 (en) 2014-05-01 2021-05-25 Ghsp, Inc. Submersible pump assembly
US10711788B2 (en) 2015-12-17 2020-07-14 Wayne/Scott Fetzer Company Integrated sump pump controller with status notifications
USD893552S1 (en) 2017-06-21 2020-08-18 Wayne/Scott Fetzer Company Pump components
USD890211S1 (en) 2018-01-11 2020-07-14 Wayne/Scott Fetzer Company Pump components
DE102018220150A1 (en) * 2018-11-23 2020-05-28 Mahle International Gmbh Pump module for coolant
USD940205S1 (en) * 2019-11-06 2022-01-04 Leistritz Pumpen Gmbh Pump for liquids
RU196491U1 (en) * 2019-12-18 2020-03-03 Сергей Викторович Яблочко Two-section electric pump unit

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2810345A (en) * 1953-02-12 1957-10-22 Flygts Pumpar Ab Pump device
DE1715520U (en) * 1955-11-11 1956-01-19 Kloeckner Humboldt Deutz Ag CENTRIFUGAL FIRE PUMP.
US3500755A (en) * 1968-05-17 1970-03-17 Crane Co Combined drag pump and electric motor
FR2186123A5 (en) * 1972-05-26 1974-01-04 Materiel Telephonique
DE2235505B1 (en) * 1972-07-20 1973-12-20 Klein, Schanzlin & Becker Ag, 6710 Frankenthal DOUBLE PUMP UNIT
CH557473A (en) * 1973-08-28 1974-12-31 Bieri Pumpenbau Ag Pumping unit for central heating systems - has two independent separately driven rotary pumps which are connected to a common inlet and outlet
FR2408739A1 (en) * 1977-11-10 1979-06-08 Materiel Telephonique MONOBLOC PUMPING DEVICE WITH AMBIVALENT OPERATION
DE2808741C2 (en) * 1978-03-01 1985-04-25 Loewe Pumpenfabrik GmbH, 2120 Lüneburg Stage housing for multistage centrifugal pumps
US4178131A (en) * 1978-08-07 1979-12-11 Roy E. Roth Company Centrifugal impellers
DE3624917A1 (en) * 1985-09-21 1987-03-26 Oplaender Wilo Werk Gmbh CENTRIFUGAL PUMP
US4738584A (en) * 1986-07-28 1988-04-19 Carl Price Multiple impeller pump
US5020420A (en) * 1989-05-16 1991-06-04 Lamar Ellis Vacuum adapter plate
US5076758A (en) * 1990-07-18 1991-12-31 Ingersoll-Rand Company Centrifugal pumps

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD834068S1 (en) 2017-01-27 2018-11-20 S.A. Armstrong Limited Control pump
USD839313S1 (en) 2017-01-27 2019-01-29 S.A. Armstrong Limited Control pump
USD839314S1 (en) 2017-01-27 2019-01-29 S.A. Armstrong Limited Control pump
USD839922S1 (en) 2017-01-27 2019-02-05 S.A. Armstrong Limited Control pump
US11732719B2 (en) 2017-01-27 2023-08-22 S.A. Armstrong Limited Dual body variable duty performance optimizing pump unit
US11965512B2 (en) 2017-01-27 2024-04-23 S.A. Armstrong Limited Dual body variable duty performance optimizing pump unit

Also Published As

Publication number Publication date
EP0464355A2 (en) 1992-01-08
EP0464355A3 (en) 1992-02-26
ES2046823T3 (en) 1994-02-01
DE59100652D1 (en) 1994-01-13
KR920002938A (en) 1992-02-28
DE4021410A1 (en) 1992-01-16
ATE98000T1 (en) 1993-12-15
US5178520A (en) 1993-01-12
KR970007394B1 (en) 1997-05-08

Similar Documents

Publication Publication Date Title
EP0464355B1 (en) Duplex centrifugal pump
DE69216938T2 (en) Compressor housing for turbochargers
DE69031167T2 (en) LOW PRESSURE RETURN VALVE
DE2246264C3 (en) Device to prevent the backflow of centrifugal pumps connected in parallel in a circuit
EP0884479B1 (en) Feed pump
DE102020104404A1 (en) TURBO FLUID MACHINE
EP0290033A1 (en) Homogenising machine for the production of fluid products
DE2148574A1 (en) Vacuum cleaner unit
DE3442843A1 (en) Vacuum pump
DE2510787A1 (en) Circulating pump for central heating - has impeller formed to act as shut off valve when pump stops
EP2378127B1 (en) Flow guiding component with pump and fitting
EP0218031B1 (en) Centrifugal pump
DE3203442C2 (en)
DE4039712C2 (en) Peripheral pump
AT394434B (en) FAN ARRANGEMENT
EP0694698B1 (en) Centrifugal pump
DE19749404C1 (en) Feed pump for motor vehicle fuel tank
DE3628177C2 (en) Inlet housing for turbo machines with radial inflow
DE3821030A1 (en) CANOPY PUMP
WO2019057482A1 (en) Set of parts and method for producing a radial fan
DE2845246A1 (en) Centrifugal pump for central heating applications - has two separate outlets from casing volute for separate circuits to enable independent closure of one circuit
DE102022213733A1 (en) centrifugal pump assembly
DE1895968U (en) CIRCULATING PUMP.
EP2776722A1 (en) Centrifugal pump for delivering liquids in a motor vehicle
EP1055826B1 (en) Valve with replaceable closure element

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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

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

AK Designated contracting states

Kind code of ref document: A3

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

17P Request for examination filed

Effective date: 19920221

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

Owner name: WILO GMBH

17Q First examination report despatched

Effective date: 19930205

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 DK ES FR GB GR IT LI LU NL SE

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: 19931201

Ref country code: DK

Effective date: 19931201

Ref country code: SE

Effective date: 19931201

REF Corresponds to:

Ref document number: 98000

Country of ref document: AT

Date of ref document: 19931215

Kind code of ref document: T

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

Effective date: 19931209

REF Corresponds to:

Ref document number: 59100652

Country of ref document: DE

Date of ref document: 19940113

ITF It: translation for a ep patent filed

Owner name: SOCIETA' ITALIANA BREVETTI S.P.A.

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2046823

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940531

Ref country code: LU

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

Effective date: 19940531

Ref country code: CH

Effective date: 19940531

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
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: AT

Payment date: 19960430

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: 19960529

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: 19960531

Year of fee payment: 6

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

Ref country code: AT

Effective date: 19970524

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

Ref country code: BE

Effective date: 19970531

BERE Be: lapsed

Owner name: WILO G.M.B.H.

Effective date: 19970531

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

Ref country code: NL

Effective date: 19971201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19971201

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: ES

Payment date: 20020510

Year of fee payment: 12

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 NON-PAYMENT OF DUE FEES

Effective date: 20030526

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030526

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

Ref country code: DE

Payment date: 20070517

Year of fee payment: 17

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

Ref country code: GB

Payment date: 20070523

Year of fee payment: 17

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

Ref country code: IT

Payment date: 20070528

Year of fee payment: 17

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

Ref country code: FR

Payment date: 20070510

Year of fee payment: 17

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

Effective date: 20080524

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20090119

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: 20081202

Ref country code: FR

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

Effective date: 20080602

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: 20080524

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: 20080524