EP0735272A1 - Centrifugal pump with venting - Google Patents

Centrifugal pump with venting Download PDF

Info

Publication number
EP0735272A1
EP0735272A1 EP96104659A EP96104659A EP0735272A1 EP 0735272 A1 EP0735272 A1 EP 0735272A1 EP 96104659 A EP96104659 A EP 96104659A EP 96104659 A EP96104659 A EP 96104659A EP 0735272 A1 EP0735272 A1 EP 0735272A1
Authority
EP
European Patent Office
Prior art keywords
insert
housing
pump
motor pump
pump according
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
EP96104659A
Other languages
German (de)
French (fr)
Other versions
EP0735272B1 (en
Inventor
Günter Strelow
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 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
Publication of EP0735272A1 publication Critical patent/EP0735272A1/en
Application granted granted Critical
Publication of EP0735272B1 publication Critical patent/EP0735272B1/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
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid 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
    • 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
    • F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/001—Preventing vapour lock
    • F04D9/002—Preventing vapour lock by means in the very pump
    • F04D9/003—Preventing vapour lock by means in the very pump separating and removing the vapour

Definitions

  • the invention relates to a centrifugal motor pump with a replaceable insert arranged in a housing and having an inlet and an outlet which lie in a lateral flat and open side wall of the housing.
  • Pumps which can alternately supply different circuits by changing their direction of rotation or by actuating internal pumps.
  • the valves are operated either hydraulically or mechanically.
  • centrifugal pump which has a housing with a lateral flat and open side wall into which an insert can be exchanged can be introduced.
  • pressure-side and suction-side channels can be individually defined, so that it is possible with such a pump, for example, to operate it with two suction and one pressure nozzle or vice versa.
  • This pump is also suitable for supplying several circuits.
  • Air pumps in the heating water can cause problems when operating pumps.
  • the air from the piping system enters the pump and reduces its delivery rate. Air bubbles also cause disturbing noises in the heating system and reduce heat transfer in the heating system.
  • venting options must be provided at the highest points in the heating system, where the air can be removed from time to time. Since this type of venting is not easy to maintain, it is known to integrate venting valves, so-called quick breather, into the pump. These quick vent valves continuously discharge the air to the environment while the pump is operating.
  • the object of the invention is to provide a centrifugal pump which can be used to supply one or more circuits by means of an exchangeable insert and which at the same time ensures the ventilation of each circuit.
  • the advantage of such a pump is that the pump can be universally adapted to the needs of the user without the ventilation device having to be replaced. Venting is automatic without the user or a heating installer having to service the system. This reduces effort and costs.
  • the invention forms a compact unit in that all components are housed in one housing without the system losing flexibility.
  • the compact design goes hand in hand with the saving of manufacturing costs. Only the costs for a ventilation device, an engine and possibly a reversing valve are incurred.
  • the savings in components also increase the reliability of the heating system, since defects can occur in fewer components.
  • the centrifugal pump according to the invention is designed such that it can be operated in two directions of rotation and can thus supply two independent circuits. Therefore, it can be easily replaced with an existing double pump.
  • the centrifugal pump 1 is operated by an electric motor 2, the direction of rotation of which is reversible in a special embodiment.
  • the electric motor is attached to the outer housing 3 and operates an impeller 5 via a shaft.
  • the electric motor is advantageously a canned motor.
  • the housing 3 is sealed with a flange 4 against the heating system.
  • the flange 4 is provided with an outlet 7 and an inlet 8.
  • Inlet 8 and outlet 7 are located on a lateral flat and open side wall 10 of the housing 3.
  • the suction side of the pump 1 is vented by means of a ventilation device 9 which is attached to the top of the outer edge of the housing 3.
  • FIG. 2 shows two sections through the pump 1 described.
  • Section A-A shows the ventilation device 9, which is attached to the top of the housing 3.
  • the ventilation device 9 has a float 11, which actuates a valve 12, through which the existing air can escape.
  • an insert 13 which, in the particular embodiment, has two parts. One part is formed by the flange 4, which extends into the housing and has 9 through openings 14 in the region of the ventilation device. Through these openings 14, the water is led past the ventilation device 9 so that the air can collect. In a special embodiment, the ventilation can take place either on the pressure side or on the suction side.
  • a second part 15 of the insert 13 is arranged.
  • this hydraulic insert 15 has a spiral channel through which the impeller 5 conveys the water to the pressure side.
  • the hydraulic insert 15 is interchangeably introduced into the housing 3.
  • the flange 4 is reinforced on the inside with ribs 16.
  • Section B-B shows the impeller 5 which is supplied with water on the suction side and which conveys it to the pressure port 8 via the channels defined by the hydraulic insert 15.
  • the venting device is designed so that it ventilates at least one flow-through channel on the pressure or suction side.
  • FIG 3 shows a pump 1 with the housing 3 described and the electric motor 2.
  • the hydraulic insert 15 and the flange 4 are designed so that the pump has two inlets 7 (suction nozzle) and one outlet 8 (pressure nozzle).
  • a valve 17 closes either one or the other inlet 7.
  • the valve 17 has a seal 18 and is pivotably mounted on an axis 19.
  • the venting device 9 ventilates both suction sides of the pump.
  • inserts 13 can optionally be used in the pump housing 3. If the direction of rotation of the motor is reversible (reversing pump), the insert 15 has a valve which enables switching between two channels. So the pump can be operated with two suction and one pressure port or vice versa. The venting device ensures that the flow through each channel is vented.
  • any use is conceivable, which, for example, transports the water into several different channels at the same time.
  • the venting can again be carried out on each channel through which the air flows.

Landscapes

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

Abstract

The pump has a housing and a removeable insert with intake and outlet. A ventilation device (9) is fastened to the top outer edge of the housing (3). The insert (13) is located below the device, and has passage apertures (14) in the area of the device. The insert has a flange (4), which engages on the housing, and seals the pump against the heating system. The insert contains a hydraulic unit (15), forming a water-containing spiral channel. It also has channels, separated by a valve.

Description

Die Erfindung betrifft eine Kreiselmotorpumpe mit einem in einem Gehäuse angeordneten auswechselbaren Einsatz, der einen Einlaß und einen Auslaß aufweist, die in einer seitlichen flachen und offenen Seitenwand des Gehäuses liegen.The invention relates to a centrifugal motor pump with a replaceable insert arranged in a housing and having an inlet and an outlet which lie in a lateral flat and open side wall of the housing.

Es ist bekannt, in modernen Heizungsanlagen sowohl Heizungskreisläufe als auch durch einen Wärmetauscher Sanitärkreisläufe zu betreiben. Um zwischen beiden Kreisläufen wechseln zu können wird entweder für jeden Kreislauf eine separate Pumpe benutzt oder es wird für beide Kreisläufe eine Doppelpumpe verwendet. Es ist gleichfalls möglich, beide Kreisläufe mittels einer Pumpe zu versorgen und mit einem Umsteuerventils zwischen den Kreisläufen umzuschalten.It is known to operate both heating circuits and sanitary circuits by means of a heat exchanger in modern heating systems. In order to be able to switch between the two circuits, either a separate pump is used for each circuit or a double pump is used for both circuits. It is also possible to supply both circuits by means of a pump and to switch between the circuits with a reversing valve.

Es sind Pumpen bekannt, die durch Änderung ihrer Drehrichtung oder durch Betätigung pumpeninterner Ventile wechselweise unterschiedliche Kreisläufe versorgen können. Die Ventile werden dabei entweder hydraulisch oder mechanisch betätigt.Pumps are known which can alternately supply different circuits by changing their direction of rotation or by actuating internal pumps. The valves are operated either hydraulically or mechanically.

Desweiteren ist aus DE 36 24 917 eine Kreiselpumpe bekannt, die ein Gehäuse mit einer seitlichen flachen und offenen Seitenwand aufweist, in das ein Einsatz auswechselbar eingebracht werden kann. Durch diesen Einsatz lassen sich druckseitige und saugseitige Kanäle individuell definieren, so daß es bei einer derartigen Pumpe beispielsweise möglich ist, sie mit zwei Saug- und einem Druckstutzen oder umgekehrt zu betreiben. So ist auch diese Pumpe zur Versorgung mehrerer Kreisläufe geeignet.Furthermore, from DE 36 24 917 a centrifugal pump is known which has a housing with a lateral flat and open side wall into which an insert can be exchanged can be introduced. Through this use, pressure-side and suction-side channels can be individually defined, so that it is possible with such a pump, for example, to operate it with two suction and one pressure nozzle or vice versa. This pump is also suitable for supplying several circuits.

Beim Betrieb von Pumpen kann es grundsätzlich durch Luftblasen im Heizungswasser zu Problemen kommen. Dabei gelangt die Luft aus dem Rohrleitungssystem in die Pumpe und mindert deren Förderleistung. Außerdem kommt es durch Luftblasen zu störenden Geräuschen im Heizungssystem und zur Verminderung der Wärmeübertragung im Heizungssystem.Air pumps in the heating water can cause problems when operating pumps. The air from the piping system enters the pump and reduces its delivery rate. Air bubbles also cause disturbing noises in the heating system and reduce heat transfer in the heating system.

Um die genannten Störungen zu vermeiden müssen an den höchsten Stellen im Heizungssystem Entlüftungsmöglichkeiten vorgesehen werden, wo die Luft von Zeit zu Zeit abgeführt werden kann. Da diese Art der Entlüftung wartungsunfreundlich ist, ist es bekannt, in die Pumpe Entlüftungsventile, sogenannte Schnellentlüfter zu integrieren. Diese Schnellentlüfter führen die Luft während des Betriebes der Pumpe kontinuierlich an die Umgebung ab.To avoid the malfunctions mentioned, ventilation options must be provided at the highest points in the heating system, where the air can be removed from time to time. Since this type of venting is not easy to maintain, it is known to integrate venting valves, so-called quick breather, into the pump. These quick vent valves continuously discharge the air to the environment while the pump is operating.

Aufgabe der Erfindung ist es, eine Kreiselpumpe zu schaffen, die durch einen auswechselbaren Einsatz zur Versorgung eines oder mehrere Kreisläufe verwendet werden kann und die gleichzeitig die Entlüftung eines jeden Kreislaufes sicherstellt.The object of the invention is to provide a centrifugal pump which can be used to supply one or more circuits by means of an exchangeable insert and which at the same time ensures the ventilation of each circuit.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruch 1 gelöst.This object is achieved by the characterizing features of claim 1.

Vorteil einer derartigen Pumpe ist, daß die Pumpe universal an den Bedarf des Benutzers angepaßt werden kann, ohne daß die Entlüftungvorrichtung ausgetauscht werden muß. Die Entlüftung geschieht automatisch, ohne daß der Benutzer oder ein Heizungsinstallateur das System warten muß. Dadurch werden Aufwand und Kosten gesenkt.The advantage of such a pump is that the pump can be universally adapted to the needs of the user without the ventilation device having to be replaced. Venting is automatic without the user or a heating installer having to service the system. This reduces effort and costs.

Im Vergleich zu einer Doppelpumpe oder zu einer Pumpe, die durch Schalten eines Umsteuerventils verschiedene Heizungskreisläufe versorgen kann, bildet die Erfindung insofern eine kompakte Einheit, als alle Bauteile in einem Gehäuse untergebracht sind, ohne daß das System an Flexibilität verliert.Compared to a double pump or to a pump that different by switching a reversing valve Can supply heating circuits, the invention forms a compact unit in that all components are housed in one housing without the system losing flexibility.

Die kompakte Bauweise geht einher mit der Einsparung von Herstellungskosten. Es fallen nur die Kosten für eine Entlüftungsvorrichtung, einen Motor und gegebenenfalls ein Umsteuerventil an.The compact design goes hand in hand with the saving of manufacturing costs. Only the costs for a ventilation device, an engine and possibly a reversing valve are incurred.

Durch die Einsparung von Bauteilen steigt zudem die Zuverlässigkeit des Heizungssystems, da an weniger Bauteilen Defekte auftreten können.The savings in components also increase the reliability of the heating system, since defects can occur in fewer components.

Die erfindungsgemäße Kreiselpumpe ist in einer besonderen Ausführungsform so ausgelegt, daß sie in zwei Drehrichtungen betrieben werden kann und so zwei unabhängige Kreisläufe versorgen kann. Daher läßt sie sich einfach gegen eine vorhandene Doppelpumpe austauschen.In a special embodiment, the centrifugal pump according to the invention is designed such that it can be operated in two directions of rotation and can thus supply two independent circuits. Therefore, it can be easily replaced with an existing double pump.

Pumpen der genannten Art, die ein Gehäuse mit einer seitlichen flachen und offenen Seitenwand aufweisen, lassen sich einfach durch eine besondere Ausführungsform der erfindungsgemäßen Kreiselpumpe austauschen, da sich die Schnittstelle zum Heizungssystem gleicht. Dadurch hat der Benutzer den Vorteil der universalen Entlüftung.Pumps of the type mentioned, which have a housing with a lateral flat and open side wall, can be easily replaced by a special embodiment of the centrifugal pump according to the invention, since the interface to the heating system is the same. This gives the user the advantage of universal ventilation.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und wird im folgenden näher beschrieben.Embodiments of the invention are shown in the drawings and will be described in more detail below.

Es zeigen:

Fig.1.
eine Kreiselpumpe mit einer Entlüftungsvorrichtung, welche die Saugseite entlüftet
Fig.2.
einen Schnitt durch eine Kreiselpumpe mit einer Entlüftungsvorrichtung und einem Druck- und einem Saugstutzen
Fig.3.
eine Kreiselpumpe, deren Laufrichtung umkehrbar ist, mit einer Entlüftungsvorrichtung, die zwei Saugseiten entlüftet
Show it:
Fig. 1.
a centrifugal pump with a venting device, which ventilates the suction side
Fig. 2.
a section through a centrifugal pump with a ventilation device and a pressure and a suction nozzle
Fig. 3.
a centrifugal pump, the direction of which is reversible, with a venting device that ventilates two suction sides

Die Kreiselpumpe 1 wird von einem Elektromotor 2 betrieben, dessen Drehrichtung in einer besonderen Ausführungsform umkehrbar ist. Der Elektromotor ist an das äußere Gehäuse 3 angebracht und betreibt über eine Welle ein Laufrad 5. Vorteilhafterweise handelt es sich bei dem Elektromotor um einen Spaltrohrmotor. Das Gehäuse 3 ist mit einem Flansch 4 gegen das Heizungssystem abgedichtet. In dieser besonderen Ausführung der Pumpe ist der Flansch 4 mit einem Auslaß 7 und einem Einlaß 8 versehen. Einlaß 8 und Auslaß 7 befinden sich an einer seitlichen flachen und offenen Seitenwand 10 des Gehäuses 3. Die Saugseite der Pumpe 1 wird mittels einer Entlüftungsvorrichtung 9 entlüftet, die oben am Außenrand des Gehäuses 3 befestigt ist.The centrifugal pump 1 is operated by an electric motor 2, the direction of rotation of which is reversible in a special embodiment. The electric motor is attached to the outer housing 3 and operates an impeller 5 via a shaft. The electric motor is advantageously a canned motor. The housing 3 is sealed with a flange 4 against the heating system. In this particular embodiment of the pump, the flange 4 is provided with an outlet 7 and an inlet 8. Inlet 8 and outlet 7 are located on a lateral flat and open side wall 10 of the housing 3. The suction side of the pump 1 is vented by means of a ventilation device 9 which is attached to the top of the outer edge of the housing 3.

Figur 2 zeigt zwei Schnitte durch die beschriebene Pumpe 1. Der Schnitt A-A zeigt die Entlüftungsvorrichtung 9, die oben auf dem Gehäuse 3 angebracht ist. Die Entlüftungsvorrichtung 9 hat einen Schwimmer 11, der ein Ventil 12 betätigt, über das die vorhandene Luft entweichen kann.Figure 2 shows two sections through the pump 1 described. Section A-A shows the ventilation device 9, which is attached to the top of the housing 3. The ventilation device 9 has a float 11, which actuates a valve 12, through which the existing air can escape.

In dem Gehäuse 3 befindet sich ein Einsatz 13, der in der besonderen Ausführungsform zweiteilig ist. Der eine Teil wird durch den Flansch 4 gebildet, der in das Gehäuse reicht und im Bereich der Entlüftungsvorrichtung 9 Durchtrittsöffnungen 14 aufweist. Durch diese Öffnungen 14 wird das Wasser an der Entlüftungsvorrichtung 9 vorbeigeführt, so daß sich die Luft ansammeln kann. Bei einer besonderen Ausführungsform kann die Entlüftung wahlweise an der Druck- oder an der Saugseite geschehen.In the housing 3 there is an insert 13 which, in the particular embodiment, has two parts. One part is formed by the flange 4, which extends into the housing and has 9 through openings 14 in the region of the ventilation device. Through these openings 14, the water is led past the ventilation device 9 so that the air can collect. In a special embodiment, the ventilation can take place either on the pressure side or on the suction side.

Neben dem Flansch 4 ist ein zweiter Teil 15 des Einsatzes 13 angeordnet. Dieser hydraulische Einsatz 15 weist in dieser Ausführungsform einen spiralförmigen Kanal auf, durch den das Laufrad 5 das Wasser zur Druckseite befördert. Der hydraulische Einsatz 15 ist austauschbar in das Gehäuse 3 eingebracht. Der Flansch 4 ist innenseitig mit Rippen 16 verstärkt.In addition to the flange 4, a second part 15 of the insert 13 is arranged. In this embodiment, this hydraulic insert 15 has a spiral channel through which the impeller 5 conveys the water to the pressure side. The hydraulic insert 15 is interchangeably introduced into the housing 3. The flange 4 is reinforced on the inside with ribs 16.

Der Schnitt B-B zeigt das Laufrad 5 das saugseitig mit Wasser versorgt wird und dieses über die durch den hydraulischen Einsatz 15 definierten Kanäle an den Druckstutzen 8 befördert.Section B-B shows the impeller 5 which is supplied with water on the suction side and which conveys it to the pressure port 8 via the channels defined by the hydraulic insert 15.

Die Entlüftungsvorrichtung ist dabei so ausgelegt, daß sie jeweils mindestens einen durchströmten Kanal druck- oder saugseitig entlüftet.The venting device is designed so that it ventilates at least one flow-through channel on the pressure or suction side.

Abbildung 3 zeigt eine Pumpe 1 mit dem beschriebenen Gehäuse 3 und dem Elektromotor 2. Der hydraulische Einsatz 15 und der Flansch 4 sind so ausgelegt, daß die Pumpe zwei Einlässe 7 (Saugstutzen) und einen Auslaß 8 (Druckstuzten) aufweist. Mittels Änderung der Drehrichtung des Motors 2 wird der Fluß innerhalb der Pumpe 1 umgekehrt. Bei der Umkehrung schließt ein Ventil 17 entweder den einen oder den anderen Einlaß 7. Das Ventil 17 weist eine Dichtung 18 auf und ist an einer Achse 19 schwenkbar gelagert. Die Entlüftungsvorrichtung 9 entlüftet dabei beide Saugseiten der Pumpe.Figure 3 shows a pump 1 with the housing 3 described and the electric motor 2. The hydraulic insert 15 and the flange 4 are designed so that the pump has two inlets 7 (suction nozzle) and one outlet 8 (pressure nozzle). By changing the direction of rotation of the motor 2, the flow within the pump 1 is reversed. In the reversal, a valve 17 closes either one or the other inlet 7. The valve 17 has a seal 18 and is pivotably mounted on an axis 19. The venting device 9 ventilates both suction sides of the pump.

In das Pumpengehäuse 3 können wahlweise verschiedene Einsätze 13 eingesetzt werden. Falls die Drehrichtung des Motors umkehrbar ist (Reversierpumpe), weist der Einsatz 15 ein Ventil auf, welches das Umschalten zwischen zwei Kanälen ermöglicht. So kann die Pumpe mit zwei Saug- und einem Druckstutzen oder umgekehrt betrieben werden. Die Entlüftung des jeweils durchströmten Kanals wird durch die Entlüftungsvorrichtung sichergestellt.Various inserts 13 can optionally be used in the pump housing 3. If the direction of rotation of the motor is reversible (reversing pump), the insert 15 has a valve which enables switching between two channels. So the pump can be operated with two suction and one pressure port or vice versa. The venting device ensures that the flow through each channel is vented.

Generell sind beliebige Einsätze denkbar, die beispielsweise das Wasser in mehrere unterschiedliche Kanäle gleichzeitig befördern. Die Entlüftung kann dabei wieder an jedem durchströmten Kanal erfolgen.In general, any use is conceivable, which, for example, transports the water into several different channels at the same time. The venting can again be carried out on each channel through which the air flows.

Claims (7)

Kreiselmotorpumpe mit einem in einem Gehäuse angeordneten auswechselbaren Einsatz, der einen Einlaß und einem Auslaß aufweist, die in einer seitlichen flachen und offenen Seitenwand des Gehäuses liegen,
dadurch gekennzeichnet, daß oben am Außenrand des Gehäuses (3) eine Entlüftungsvorrichtung (9) befestigt ist, unterhalb derer der Einsatz (13) angeordnet ist, der zumindest im Bereich der Entlüftungsvorrichtung (9) Durchtrittsöffnungen (14) aufweist.Centrifugal motor pump with a replaceable insert arranged in a housing, which has an inlet and an outlet, which lie in a lateral flat and open side wall of the housing,
characterized in that a venting device (9) is attached to the top of the outer edge of the housing (3), below which the insert (13) is arranged, which has through openings (14) at least in the region of the venting device (9). Kreiselmotorpumpe nach Anspruch 1,
dadurch gekennzeichnet, daß der Einsatz (13) einen Flansch (4) aufweist, der an dem Gehäuse (3) anliegt und die Kreiselmotorpumpe gegen das Heizungssystem abdichtet.Centrifugal motor pump according to claim 1,
characterized in that the insert (13) has a flange (4) which bears against the housing (3) and seals the centrifugal motor pump against the heating system. Kreiselmotorpumpe nach Anspruch 1,
dadurch gekennzeichnet, daß der Einsatz (13) einen das Laufrad (5) umgebenden hydraulischen Einsatz (15) aufweist, der einen wasserführenden Kanal bildet.Centrifugal motor pump according to claim 1,
characterized in that the insert (13) has a hydraulic insert (15) surrounding the impeller (5) which forms a water-carrying channel. Kreiselmotorpumpe nach Anspruch 3,
dadurch gekennzeichnet, daß der hydraulische Einsatz (15) einen spiralförmigen Kanal bildet.Centrifugal pump according to claim 3,
characterized in that the hydraulic insert (15) forms a spiral channel. Kreiselmotorpumpe nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß die Entlüftungsvorrichtung (9) mindestens einen druckseitigen oder mindestens einen saugseitigen Kanal entlüftet.Centrifugal motor pump according to one of the preceding claims,
characterized in that the ventilation device (9) vents at least one pressure-side or at least one suction-side channel. Kreiselmotorpumpe nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß der Einsatz (13) Kanäle aufweist, die durch ein Ventil getrennt sind.Centrifugal motor pump according to one of the preceding claims,
characterized in that the insert (13) has channels which are separated by a valve. Kreiselmotorpumpe nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß der Einsatz (13) den Wasserstrom druckseitig auf mehrere Kanäle verteilt.Centrifugal motor pump according to one of the preceding claims,
characterized in that the insert (13) distributes the water flow on the pressure side to several channels.
EP96104659A 1995-03-28 1996-03-23 Centrifugal pump with venting Expired - Lifetime EP0735272B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19511027A DE19511027A1 (en) 1995-03-28 1995-03-28 Centrifugal pump with ventilation
DE19511027 1995-03-28

Publications (2)

Publication Number Publication Date
EP0735272A1 true EP0735272A1 (en) 1996-10-02
EP0735272B1 EP0735272B1 (en) 1999-06-02

Family

ID=7757759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96104659A Expired - Lifetime EP0735272B1 (en) 1995-03-28 1996-03-23 Centrifugal pump with venting

Country Status (2)

Country Link
EP (1) EP0735272B1 (en)
DE (2) DE19511027A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2990651A1 (en) * 2014-08-25 2016-03-02 Grundfos Holding A/S Pump casing
EP3364043A1 (en) * 2017-02-20 2018-08-22 Grundfos Holding A/S Pump unit with integrated air venting and liquid purge device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008052884A1 (en) * 2008-10-23 2010-05-06 Wilo Se pump housing

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1532578A (en) * 1967-05-31 1968-07-12 Chaffoteaux Et Maury Improvements to pumps
GB1458192A (en) * 1973-05-09 1976-12-08 Sealed Motor
US4447189A (en) * 1981-01-30 1984-05-08 Grundfos A/S Centrifugal pump for moving gaseous liquids
DE3624917A1 (en) * 1985-09-21 1987-03-26 Oplaender Wilo Werk Gmbh CENTRIFUGAL PUMP
EP0464355A2 (en) * 1990-07-06 1992-01-08 WILO GmbH Duplex centrifugal pump
DE9208801U1 (en) * 1992-07-01 1992-09-03 Grundfos A/S, Bjerringbro Pump unit
DE9416551U1 (en) * 1994-10-14 1994-12-01 Wilo Gmbh, 44263 Dortmund Centrifugal pump with screw connection

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3637040A1 (en) * 1986-10-31 1988-05-19 Grundfos Int CENTRIFUGAL PUMP AS A CIRCUIT PUMP FOR HEATING SYSTEMS

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1532578A (en) * 1967-05-31 1968-07-12 Chaffoteaux Et Maury Improvements to pumps
GB1458192A (en) * 1973-05-09 1976-12-08 Sealed Motor
US4447189A (en) * 1981-01-30 1984-05-08 Grundfos A/S Centrifugal pump for moving gaseous liquids
DE3624917A1 (en) * 1985-09-21 1987-03-26 Oplaender Wilo Werk Gmbh CENTRIFUGAL PUMP
EP0464355A2 (en) * 1990-07-06 1992-01-08 WILO GmbH Duplex centrifugal pump
DE9208801U1 (en) * 1992-07-01 1992-09-03 Grundfos A/S, Bjerringbro Pump unit
DE9416551U1 (en) * 1994-10-14 1994-12-01 Wilo Gmbh, 44263 Dortmund Centrifugal pump with screw connection

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2990651A1 (en) * 2014-08-25 2016-03-02 Grundfos Holding A/S Pump casing
CN105387000A (en) * 2014-08-25 2016-03-09 格兰富控股联合股份公司 Pump casing
EP2990651B1 (en) 2014-08-25 2018-07-11 Grundfos Holding A/S Pump casing
CN105387000B (en) * 2014-08-25 2020-05-22 格兰富控股联合股份公司 Pump casing
EP3364043A1 (en) * 2017-02-20 2018-08-22 Grundfos Holding A/S Pump unit with integrated air venting and liquid purge device

Also Published As

Publication number Publication date
DE19511027A1 (en) 1996-10-02
DE59602046D1 (en) 1999-07-08
EP0735272B1 (en) 1999-06-02

Similar Documents

Publication Publication Date Title
EP0464355B1 (en) Duplex centrifugal pump
DE19932313A1 (en) Controller for internal combustion engine cooling, heating circuit has rotary disc on valve housing, drive unit, cooling line openings in housing for delivery to supply pump and sub-circuits
DE102005033224A1 (en) Extractor hood e.g. flat screen hood, for use in kitchen, has distributor chamber for guiding supply air into housing, where chamber is narrowed by part of housing external wall and part of exhaust air system provided in housing
DE60036860T2 (en) FLOW CONTROL VALVE
EP0874201B1 (en) Assembly for a compact heating installation
EP0460399B1 (en) Centrifugal pump and gasboiler including the same
EP0174454A2 (en) Installation for the minimalisation of cooling liquid consumption, especially for liquid ring vacuum pumps or similar pumps
EP0735272B1 (en) Centrifugal pump with venting
DE2704863A1 (en) NON-RETURN VALVE FOR A LIQUID RING GAS PUMP
DE3313458C2 (en) Lifting system for sewage containing faeces
DE202018006087U1 (en) Arrangement for the collection and discharge of deicing and condensation water from refrigeration and cooling units
DE69221415T2 (en) Screw piston vacuum pump
EP3364043B1 (en) Pump unit with integrated air venting and liquid purge device
DE10106672A1 (en) Slitter
DE60207045T2 (en) WATER FLOW CONTROL VALVE
EP0791772B1 (en) Three-way valve for hydraulic interface
DE3339948C2 (en) Circulation pump for water jets on bathtubs
EP1079113B1 (en) Centrifugal pump casing for a circulating pump for two fluid circuits
DE4018929C1 (en) Hot water central heating with heat exchange system - has three-way valve between circulation pumps for specified pump connections
DE10007072B4 (en) Multi-way valve and system with such a multi-way valve
DE10296521B4 (en) pumping device
DE3925270C2 (en)
EP2629019B1 (en) Housing unit for a heater
DE19711085A1 (en) Three or four-way valve and adapter piece
EP2093516B1 (en) Component for a compact heating system

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR GB IT

17P Request for examination filed

Effective date: 19961029

17Q First examination report despatched

Effective date: 19980206

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB IT

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

Effective date: 19990603

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59602046

Country of ref document: DE

Date of ref document: 19990708

ITF It: translation for a ep patent filed

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

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: 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: BE

Payment date: 20020408

Year of fee payment: 7

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: 20030331

BERE Be: lapsed

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

Effective date: 20030331

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

Ref country code: FR

Payment date: 20140311

Year of fee payment: 19

Ref country code: IT

Payment date: 20140319

Year of fee payment: 19

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

Ref country code: GB

Payment date: 20140319

Year of fee payment: 19

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

Ref country code: DE

Payment date: 20140417

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59602046

Country of ref document: DE

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

Effective date: 20150323

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: 20150323

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20151130

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: 20150323

Ref country code: DE

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

Effective date: 20151001

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

Ref country code: FR

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

Effective date: 20150331