EP2072823B1 - Rotary pump with venting arrangement - Google Patents

Rotary pump with venting arrangement Download PDF

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Publication number
EP2072823B1
EP2072823B1 EP08021509.8A EP08021509A EP2072823B1 EP 2072823 B1 EP2072823 B1 EP 2072823B1 EP 08021509 A EP08021509 A EP 08021509A EP 2072823 B1 EP2072823 B1 EP 2072823B1
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EP
European Patent Office
Prior art keywords
separation chamber
pump
chamber
venting
pump according
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Application number
EP08021509.8A
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German (de)
French (fr)
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EP2072823A2 (en
EP2072823A3 (en
Inventor
Thomas Müller
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
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Wilo SE
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Publication of EP2072823A2 publication Critical patent/EP2072823A2/en
Publication of EP2072823A3 publication Critical patent/EP2072823A3/en
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Publication of EP2072823B1 publication Critical patent/EP2072823B1/en
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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
    • 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 pump with a flowed through by the liquid to be conveyed, arranged in the flow direction in front of the pump chamber separation chamber, wherein the separation chamber is formed substantially cylindrical with a vertical axis, to form a liquid cyclone in the separation chamber of the liquid inlet has a tangential orientation, and Separation chamber has an upper central vent.
  • the object of the invention is to improve the separation chamber upstream of a centrifugal pump in such a way that with small external dimensions a high venting performance can be achieved.
  • This object is achieved in that the upper vent of the separation chamber is surrounded by a tube which projects down into the separation chamber and that the separation chamber is connected to the pump chamber via a channel, the goes off the side of the separation chamber at the level of the tube and opens at the suction port of the pump impeller.
  • a low volume of the separation chamber can be achieved with high venting performance, so that the overall external dimensions of the venting device and the pump are low. Also, a particularly early and safe separation of the gas bubbles is achieved from the liquid.
  • the length of the tube is 1 ⁇ 4 to 1 ⁇ 2 of the height of the separation chamber, preferably at least the height of the entrance of the channel.
  • the upper vent opening of the separation chamber leads to a ventilation chamber arranged above the separation chamber, wherein an automatic venting takes place.
  • the upper venting chamber may have a float which can be dismantled upwards.
  • the housing of the venting device in particular the separation chamber is integrally connected to the housing of the pump, so that the pump and the venting device form a unit is particularly advantageous.
  • the liquid inlet of the separation chamber has at least one guide surface guiding the liquid and the liquid inlet of the separation chamber is arranged on its underside and stationary guide vanes have in particular a guide vane ring.
  • a particularly stable cyclone is produced in the separation chamber and, moreover, the outer dimensions are reduced since a lateral inflow is not required.
  • the inlet of the separation chamber is arranged on its underside and in this case forms the suction nozzle of the pump.
  • a centrifugal pump 1 which is used in particular for circulating the heating water in heating systems, has within a pump housing 2 a spiral space 3, in which a pump impeller 1a is mounted.
  • the pump impeller can be driven by an electric motor, not shown, which can be fastened with its motor housing to a connection surface 4 of the housing 2.
  • a coaxial to the pump impeller 5 opens at the suction port of the pump impeller 1a, so that the pump 1 promotes from the channel 5 to the discharge nozzle 6, which is connected to the spiral space 3.
  • the discharge nozzle 6 is arranged on the upper side of the pump with a preferably vertical axis and has an external thread 7.
  • a ventilation device 8 is laterally formed with its housing 9, so that the two housings 2, 9 are in one piece.
  • the housing 9 forms a lower separation chamber 10, in which the incoming liquid in particular water forms a cyclone, so that the space 10 can also be called a "cyclone chamber”.
  • the separation chamber 10 has a lower liquid inlet 11, whose cross section is circular and corresponds to the cross section of the separation chamber 10. In this case, the inlet 11 goes down into the suction nozzle 12, which simultaneously forms the suction nozzle of the pump.
  • a vane ring 13 is coaxially mounted near the lower liquid inlet 11 and thus close to the suction nozzle 12, wherein the guide vanes 14 annularly surround a central, aerodynamically shaped body.
  • the guide vanes 14 move or rotate, but solely by the suction of the liquid is formed by the cyclone.
  • the opening 16 is surrounded by a central coaxial tube 17, which is open at the bottom and thus projects down into the space 10 to safely receive the gas bubbles accumulating in the center of the cyclone and to lead upwards into a venting chamber 18.
  • the length of the tube (17) 1 ⁇ 4 to 1 ⁇ 2 height of the separation chamber, preferably at least the height of the inlet 20 of the channel 5.
  • a float 19 is mounted for automatic venting.
  • the parts 11 to 19 are arranged coaxially to each other.
  • the freed from the air bubbles liquid passes through an upper, arranged on the separation chamber 10 outlet opening 20 in a horizontal channel 5, which connects the separation chamber 10 with the spiral space 3, wherein the channel 5 opens at the suction opening of the pump impeller.
  • the axis of the pressure port 6 is arranged parallel to the axis of the suction nozzle 12 and the separation chamber 10, so that a simple attachment in pipes is made possible.

Description

Die Erfindung betrifft eine Kreiselpumpe mit einer von der zu fördernden Flüssigkeit durchströmten, in Strömungsrichtung vor der Pumpenkammer angeordneten Separationskammer, wobei die Separationskammer im Wesentlichen zylindrisch mit senkrechter Achse ausgebildet ist, zum Bilden eines Flüssigkeitszyklons in der Separationskammer der Flüssigkeitseinlass eine tangentiale Ausrichtung aufweist, und die Separationskammer eine obere mittige Entlüftungsöffnung aufweist.The invention relates to a centrifugal pump with a flowed through by the liquid to be conveyed, arranged in the flow direction in front of the pump chamber separation chamber, wherein the separation chamber is formed substantially cylindrical with a vertical axis, to form a liquid cyclone in the separation chamber of the liquid inlet has a tangential orientation, and Separation chamber has an upper central vent.

Eine solche Kreiselpumpe ist aus der EP 27 179 A1 bekannt. Zudem sind die unterschiedlichsten Luftabscheidevorrichtungen insbesondere für Heizungsanlagen bekannt, wobei es auch üblich ist, diese Vorrichtungen direkt an einer Kreiselpumpe anzuordnen, wie dies die EP 905 380 und die DE 37 03 434 zeigen. Diese bekannten Entlüftungsvorrichtungen besitzen verhältnismäßig große Außenabmessungen und geringe Entlüftungsleistungen.Such a centrifugal pump is out of the EP 27 179 A1 known. In addition, the most diverse Luftabscheidevorrichtungen especially for heating systems are known, and it is also common to arrange these devices directly to a centrifugal pump, as the EP 905 380 and the DE 37 03 434 demonstrate. These known venting devices have relatively large external dimensions and low venting performance.

Aufgabe der Erfindung ist es, die eine Kreiselpumpe vorgeschaltete Separationskammer in einer Weise zu verbessern, dass bei geringen Außenabmessungen eine hohe Entlüftungsleistung erreichbar ist.The object of the invention is to improve the separation chamber upstream of a centrifugal pump in such a way that with small external dimensions a high venting performance can be achieved.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die obere Entlüftungsöffnung der Separationskammer von einem Rohr umgeben ist, das nach unten in die Separationskammer hineinragt und dass die Separationskammer mit dem Pumpenraum über einen Kanal verbunden ist, der seitlich der Separationskammer in Höhe des Rohres abgeht und an der Saugöffnung des Pumpenlaufrades mündet.This object is achieved in that the upper vent of the separation chamber is surrounded by a tube which projects down into the separation chamber and that the separation chamber is connected to the pump chamber via a channel, the goes off the side of the separation chamber at the level of the tube and opens at the suction port of the pump impeller.

Hierdurch kann bei hoher Entlüftungsleistung ein geringes Bauvolumen der Separationskammer erreicht werden, so dass die Gesamtaußenabmessungen der Entlüftungsvorrichtung und der Pumpe gering sind. Auch wird eine besonders frühe und sichere Trennung der Gasblasen aus der Flüssigkeit erreicht.As a result, a low volume of the separation chamber can be achieved with high venting performance, so that the overall external dimensions of the venting device and the pump are low. Also, a particularly early and safe separation of the gas bubbles is achieved from the liquid.

Vorzugsweise wird vorgeschlagen, dass die Länge des Rohres ¼ bis ½ der Höhe der Separationskammer, vorzugsweise mindestens die Höhe des Eingangs des Kanals beträgt. Ferner wird vorgeschlagen, dass die obere Entlüftungsöffnung der Separationskammer zu einer oberhalb der Separationskammer angeordneten Entlüftungskammer führt, wobei eine automatische Entlüftung erfolgt. Hierbei kann die obere Entlüftungskammer einen Schwimmer aufweisen, der nach oben hin demontierbar ist.Preferably, it is proposed that the length of the tube is ¼ to ½ of the height of the separation chamber, preferably at least the height of the entrance of the channel. It is also proposed that the upper vent opening of the separation chamber leads to a ventilation chamber arranged above the separation chamber, wherein an automatic venting takes place. In this case, the upper venting chamber may have a float which can be dismantled upwards.

Besonders vorteilhaft ist es, wenn das Gehäuse der Entlüftungsvorrichtung insbesondere der Separationskammer mit dem Gehäuse der Pumpe einstückig verbunden ist, so dass die Pumpe und die Entlüftungsvorrichtung eine Einheit bilden.It when the housing of the venting device, in particular the separation chamber is integrally connected to the housing of the pump, so that the pump and the venting device form a unit is particularly advantageous.

Besonders vorteilhaft ist es, wenn der Flüssigkeitseinlass der Separationskammer mindestens eine die Flüssigkeit führende Leitfläche aufweist und der Flüssigkeitseinlass der Separationskammer an ihrer Unterseite angeordnet ist und stillstehende Leitschaufeln insbesondere einen Leitschaufelkranz aufweist. Hierdurch wird ein besonders stabiler Zyklon in der Separationskammer erzeugt und darüber hinaus die Außenabmessungen verringert, da ein seitlicher Zulauf nicht erforderlich ist. Vielmehr hat es sich als besonders günstig herausgestellt, dass der Einlass der Separationskammer an ihrer Unterseite angeordnet ist und hierbei den Saugstutzen der Pumpe bildet.It is particularly advantageous if the liquid inlet of the separation chamber has at least one guide surface guiding the liquid and the liquid inlet of the separation chamber is arranged on its underside and stationary guide vanes have in particular a guide vane ring. As a result, a particularly stable cyclone is produced in the separation chamber and, moreover, the outer dimensions are reduced since a lateral inflow is not required. Rather, it has been found to be particularly favorable that the inlet of the separation chamber is arranged on its underside and in this case forms the suction nozzle of the pump.

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

Fig. 1
einen senkrechten Schnitt durch die Pumpe mit Entlüftungsvorrichtung und
Fig. 2
eine perspektivische Ansicht.
An embodiment of the invention is illustrated in the drawings and will be described in more detail below. Show it
Fig. 1
a vertical section through the pump with venting device and
Fig. 2
a perspective view.

Eine Kreiselpumpe 1, die insbesondere zum Umwälzen des Heizungswassers bei Heizungsanlagen verwendet wird, weist innerhalb eines Pumpengehäuses 2 einen Spiralraum 3 auf, in dem ein Pumpenlaufrad 1a gelagert ist. Das Pumpenlaufrad ist über einen nicht dargestellten Elektromotor antreibbar, der mit seinem Motorengehäuse an einer Anschlussfläche 4 des Gehäuses 2 befestigbar ist.A centrifugal pump 1, which is used in particular for circulating the heating water in heating systems, has within a pump housing 2 a spiral space 3, in which a pump impeller 1a is mounted. The pump impeller can be driven by an electric motor, not shown, which can be fastened with its motor housing to a connection surface 4 of the housing 2.

Ein zum Pumpenlaufrad koaxialer Kanal 5 mündet an der Saugöffnung des Pumpenlaufrades 1a, so dass die Pumpe 1 aus dem Kanal 5 zum Druckstutzen 6 fördert, der mit dem Spiralraum 3 verbunden ist. Hierbei ist der Druckstutzen 6 an der Oberseite der Pumpe mit vorzugsweise senkrechter Achse angeordnet und weist ein Außengewinde 7 auf.A coaxial to the pump impeller 5 opens at the suction port of the pump impeller 1a, so that the pump 1 promotes from the channel 5 to the discharge nozzle 6, which is connected to the spiral space 3. Here, the discharge nozzle 6 is arranged on the upper side of the pump with a preferably vertical axis and has an external thread 7.

Am Pumpengehäuse 2 ist seitlich eine Entlüftungsvorrichtung 8 mit ihrem Gehäuse 9 angeformt, so dass die beiden Gehäuse 2, 9 einstückig sind. Das Gehäuse 9 bildet eine untere Separationskammer 10, in der die eingehende Flüssigkeit insbesondere Wasser einen Zyklon ausbildet, so dass der Raum 10 auch eine "Zyklonkammer" genannt werden kann. Die Separationskammer 10 weist einen unteren Flüssigkeitseinlass 11 auf, dessen Querschnitt kreisförmig ist und dem Querschnitt der Separationskammer 10 entspricht. Hierbei geht der Einlass 11 nach unten in den Saugstutzen 12 über, der gleichzeitig den Saugstutzen der Pumpe bildet.On the pump housing 2, a ventilation device 8 is laterally formed with its housing 9, so that the two housings 2, 9 are in one piece. The housing 9 forms a lower separation chamber 10, in which the incoming liquid in particular water forms a cyclone, so that the space 10 can also be called a "cyclone chamber". The separation chamber 10 has a lower liquid inlet 11, whose cross section is circular and corresponds to the cross section of the separation chamber 10. In this case, the inlet 11 goes down into the suction nozzle 12, which simultaneously forms the suction nozzle of the pump.

In der zylindrischen Separationskammer 10, dessen Achse senkrecht steht, ist nahe dem unteren Flüssigkeitseinlass 11 und damit nahe dem Saugstutzen 12 ein Leitschaufelkranz 13 koaxial befestigt, wobei die Leitschaufeln 14 ringförmig einen mittigen, strömungsgünstig geformten Körper umgeben. Durch den Leitschaufelkranz 13 wird die angesaugte Flüssigkeit zu einem Zyklon bewegt, der innerhalb der Separationskammer 10 rotiert. Hierbei ist es nicht erforderlich, dass die Leitschaufeln 14 sich bewegen bzw. rotieren, sondern allein durch das Ansaugen der Flüssigkeit entsteht der Zyklon.In the cylindrical separation chamber 10, whose axis is perpendicular, a vane ring 13 is coaxially mounted near the lower liquid inlet 11 and thus close to the suction nozzle 12, wherein the guide vanes 14 annularly surround a central, aerodynamically shaped body. Through the vane ring 13, the sucked liquid is moved to a cyclone which rotates within the separation chamber 10. It is not necessary that the guide vanes 14 move or rotate, but solely by the suction of the liquid is formed by the cyclone.

Durch den Zyklon gelangen in der Flüssigkeit befindliche Gasblasen (insbesondere Luftblasen) in den mittleren Bereich des Zyklons und damit zu einer oberen Entlüftungsöffnung 16, die in der oberen Abschlusswand der Separationskammer 10 angeordnet ist. Erfindungsgemäß ist die Öffnung 16 von einem mittleren koaxialen Rohr 17 umgeben, das nach unten offen ist und damit nach unten in den Raum 10 hineinragt, um die sich in der Mitte des Zyklons ansammelnden Gasblasen sicher aufzunehmen und nach oben in eine Entlüftungskammer 18 zu führen. Hierbei beträgt die Länge des Rohres (17) ¼ bis ½ Höhe der Separationskammer, vorzugsweise mindestens die Höhe des Eingangs 20 des Kanals 5. In der oberhalb der Separationskammer 10 koaxial angeordneten Entlüftungskammer 18 ist ein Schwimmer 19 zur selbsttätigen Entlüftung gelagert. Hierbei sind die Teile 11 bis 19 zueinander koaxial angeordnet.Through the cyclone gas bubbles located in the liquid (in particular air bubbles) in the central region of the cyclone and thus to an upper vent 16, which is arranged in the upper end wall of the separation chamber 10. According to the invention, the opening 16 is surrounded by a central coaxial tube 17, which is open at the bottom and thus projects down into the space 10 to safely receive the gas bubbles accumulating in the center of the cyclone and to lead upwards into a venting chamber 18. Here, the length of the tube (17) ¼ to ½ height of the separation chamber, preferably at least the height of the inlet 20 of the channel 5. In the above the separation chamber 10 coaxially arranged venting chamber 18, a float 19 is mounted for automatic venting. Here, the parts 11 to 19 are arranged coaxially to each other.

Die von den Luftblasen befreite Flüssigkeit gelangt über eine obere, an der Separationskammer 10 angeordnete Auslassöffnung 20 in einen waagerechten Kanal 5, der die Separationskammer 10 mit dem Spiralraum 3 verbindet, wobei der Kanal 5 an der Saugöffnung des Pumpenlaufrades mündet. Die Achse des Druckstutzens 6 ist parallel zur Achse des Saugstutzens 12 und der Separationskammer 10 angeordnet, so dass eine einfache Befestigung in Rohrleitungen ermöglicht wird.The freed from the air bubbles liquid passes through an upper, arranged on the separation chamber 10 outlet opening 20 in a horizontal channel 5, which connects the separation chamber 10 with the spiral space 3, wherein the channel 5 opens at the suction opening of the pump impeller. The axis of the pressure port 6 is arranged parallel to the axis of the suction nozzle 12 and the separation chamber 10, so that a simple attachment in pipes is made possible.

Claims (8)

  1. Rotary pump (1) having a separation chamber (10) through which the liquid to be delivered flows and which is arranged upstream of the pump chamber (3) in the flow direction, wherein
    - the separation chamber (10) is formed substantially cylindrically with a vertical axis,
    - the liquid inlet has a tangential orientation for the purpose of forming a liquid cyclone in the separation chamber (10), and
    - the separation chamber (10) has an upper central venting opening (16),
    characterized in that the upper venting opening (16) of the separation chamber (10) is surrounded by a tube (17) which projects into the separation chamber (10) in the downward direction, and in that the separation chamber (10) is connected to the pump chamber (3) via a duct (5) which extends laterally from the separation chamber at the height of the tube (17) and which opens at the suction opening of the pump impeller.
  2. Pump according to Claim 1, characterized in that the length of the tube (17) is ¼ to ½ of the height of the separation chamber (10), preferably at least the height of the inlet (20) of the duct (5) .
  3. Pump according to either of the preceding claims, characterized in that the inlet (11) of the separation chamber (10) forms the suction connection piece (12) of the pump (1) or is close to the suction connection piece (12) of the pump (1).
  4. Pump according to one of the preceding claims, characterized in that the upper venting opening (16) of the separation chamber (10) leads to a venting chamber (18) which is arranged above the separation chamber.
  5. Pump according to Claim 4, characterized in that the upper venting chamber (18) has a float (19) which is able to be dismounted in the upward direction.
  6. Pump according to one of the preceding claims, characterized in that the housing (9) of the venting device, in particular of the separation chamber (10), is integrally connected to the housing (2) of the pump (1).
  7. Pump according to one of the preceding claims, characterized in that the liquid inlet of the separation chamber (10) has at least one guide surface (14) which conducts the liquid.
  8. Pump according to one of the preceding claims, characterized in that the liquid inlet (11) of the separation chamber (10) is arranged on the underside of the latter and has at least one stationary guide blade (14), in particular a guide blade ring (13).
EP08021509.8A 2007-12-18 2008-12-11 Rotary pump with venting arrangement Active EP2072823B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710061558 DE102007061558A1 (en) 2007-12-18 2007-12-18 Centrifugal pump with ventilation

Publications (3)

Publication Number Publication Date
EP2072823A2 EP2072823A2 (en) 2009-06-24
EP2072823A3 EP2072823A3 (en) 2014-06-25
EP2072823B1 true EP2072823B1 (en) 2018-08-08

Family

ID=40210450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08021509.8A Active EP2072823B1 (en) 2007-12-18 2008-12-11 Rotary pump with venting arrangement

Country Status (2)

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EP (1) EP2072823B1 (en)
DE (1) DE102007061558A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH710814A2 (en) * 2015-03-03 2016-09-15 Imi Hydronic Eng Switzerland Ag Device for degassing a liquid.
CN114893393A (en) * 2022-04-21 2022-08-12 北京太阳宫燃气热电有限公司 Exhaust device of water feeding pump of gas boiler

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6404199A (en) * 1964-04-17 1965-10-18
DE1653725A1 (en) * 1967-09-29 1972-01-13 Hanning Elektro Werke Circulation pump for heating systems
EP0027179B1 (en) * 1979-09-13 1984-07-18 Joh. Vaillant GmbH u. Co. Pump with degasser
SE420230C (en) * 1980-10-20 1987-08-24 Sala International Ab DEVICE FOR PUMPING FOR FOAMING LIQUIDS
DE8102304U1 (en) * 1981-01-30 1981-07-02 Grundfos A/S, 8850 Bjerringbro PUMP WITH NAMEPLATE
DE3109918C2 (en) * 1981-03-14 1989-03-16 Wilo-Werk Gmbh & Co Pumpen- Und Apparatebau, 4600 Dortmund Liquid pump with gas separation chamber
DE3703434A1 (en) 1987-02-05 1988-08-18 Oplaender Wilo Werk Gmbh Centrifugal pump with vent chamber - has passage with side outlet enclosing outlet to rotor
AT389236B (en) * 1987-11-03 1989-11-10 Trawoeger Werner SEPARATOR
DE19743062A1 (en) 1997-09-30 1999-04-01 Wilo Gmbh Air separation device

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Publication number Publication date
EP2072823A2 (en) 2009-06-24
EP2072823A3 (en) 2014-06-25
DE102007061558A1 (en) 2009-06-25

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