EP0774583B1 - Casing for a centrifugal pump - Google Patents
Casing for a centrifugal pump Download PDFInfo
- Publication number
- EP0774583B1 EP0774583B1 EP96117898A EP96117898A EP0774583B1 EP 0774583 B1 EP0774583 B1 EP 0774583B1 EP 96117898 A EP96117898 A EP 96117898A EP 96117898 A EP96117898 A EP 96117898A EP 0774583 B1 EP0774583 B1 EP 0774583B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connections
- casing
- pressure
- housing
- conduits
- 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
Links
- 238000009530 blood pressure measurement Methods 0.000 claims description 16
- 238000003754 machining Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims 2
- 238000009434 installation Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000012549 training Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 208000034656 Contusions Diseases 0.000 description 1
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
-
- 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
Definitions
- the invention relates to a housing for a centrifugal pump.
- Centrifugal pump units with a housing of the aforementioned type are known, for example multi-stage high-pressure centrifugal pumps the Grundfos CR / CP series or heating circulation pumps of the Grundfos type DN 32-100.
- Such modern pump sets are speed controllable.
- a pressure measurement on the suction side is required and pressure side.
- Connections for pressure measurement on the suction and on on the pressure side is usually the case around lateral bores in the pressure port and in the suction port.
- these connections are made a differential pressure transducer via suitable piping connected, which detects the corresponding pressures and in the form forwards electrical signals to the control system.
- the differential pressure sensor is in these known centrifugal pump housings arranged externally and either by the manufacturer or on site during installation using appropriate piping or hose connections to the housing connections connect.
- a centrifugal pump in the pump housing one by means of a throttle valve lockable channel to be provided.
- a bypass control is used for simple, unregulated heating circulation pump units used, to reduce flow noise in the heating system.
- Such a bypass reduces the efficiency of the pump considerably.
- the invention lies Task based on a housing of the type mentioned above to further that the manufacturing and assembly costs of Pump units, in particular for speed-controlled heating circulation pumps reduced in medium and large series production can be.
- the invention provides the connections for Pressure measurement on a mounting base provided on the pump housing to arrange which for connecting a differential pressure transducer is provided, the line connections to these Connections by lying inside the housing and on the Mounting bases opening channels are formed.
- the training according to the invention has the advantage that the differential pressure sensor Can be mounted directly on the pump housing without any further piping. So that Installation and connection of the differential pressure sensor as well the electrical connection to the usually in the terminal box of the Pump unit arranged control electronics in simple Way in pump manufacture and assembly, so that the previous time-consuming piping and external installation completely eliminated.
- the manufacturer's installation of the differential pressure sensor can in the housing design according to the invention using handling machines quickly and inexpensively respectively. Furthermore, there is no risk of incorrect connections during installation and assembly of the pump on site.
- the lines to the pressure measuring connections through a common Form channel that is suction and inside the housing Connects pressure side with each other and that by means of the assembled Differential pressure transducer is separable.
- the differential pressure sensor can be in a cross hole dividing the channel sit, which is cheap to manufacture technically. Furthermore can with this training the housing for unregulated or differently regulated units are used, if a blind plug instead of the differential pressure sensor is used.
- the cables can pass through appropriate design of the core within the housing be formed. It is particularly advantageous if the lines lie in the division plane of the core box and thus in one piece can be made with the core. Especially if the lines can only have a small diameter however, this can be problematic with cast construction. For this In cases, the invention provides further training in that that one or more pipes are cast in the housing are, which form the lines to the pressure measuring connections.
- a material-removing for the formation of the assembly base Machining on at least one pad of the Housing will be required, according to a training the invention a common tube to form both lines poured into the housing to the pressure measuring connections his. This tube is then at a predetermined location, for example by squeezing in the line passage, blocked. Should the housing for pump units without differential pressure transducer used, it remains unprocessed and so that the channel formed by the pipe is blocked. If on the other hand a differential pressure transducer is to be connected, there is a material-lifting processing of the housing in the Area of the mounting base. This processing is designed so that the pressure connections by opening the pipeline be formed. Instead of a common line forming both lines Pipe can also have two separate ends Pipe blocked pipes are poured in the later processing of the assembly base to form the Pressure measurement connections and for line connection to the suction side or print page can be opened.
- the centrifugal pump housing 1 shown in Fig. 1 is part of the 2 is shown in section heating circulation pump unit, consisting of the pump housing 1, the motor housing 2, the Motor 3 and the impeller 5 driven by its shaft 4.
- the motor housing 2 is screw-fastened to the pump housing 1 has a terminal box 6 in which a frequency converter and the control electronics for the motor 3 are integrated.
- the Control electronics is electrical with a differential pressure sensor 7 connected, which is shown in Fig. 1 as an add-on module and directly attached to a mounting base 8 of the pump housing 1 is.
- the pump housing 1 shown is part of an inline pump, at the suction nozzle 9 and pressure nozzle 10 arranged axially are.
- the nozzles 9, 10 are in the embodiment shown as Connection flanges formed.
- Connections 11 are provided for pressure measurement, as has been the case up to now was provided for pump units of this type.
- these connections 11 closed by plugs, not shown.
- additional sensors or also a differential pressure meter of conventional external design be connected. In this way, such a pump housing also for state-of-the-art pump units be used.
- the suction port 9 leads to the suction chamber 12 and the pressure port 10 to the pressure chamber 13 of the pump.
- Pressure chamber 13 and suction chamber 12 are connected to each other by a channel 14 which is inside a rib 15 of the housing is arranged.
- Channel 14 is penetrated by a transverse bore 16 of larger diameter, which forms part of the mounting base 8 and either as a blind hole or is designed as a through hole.
- This bore 16 is provided for receiving the differential pressure transducer, and in such a way that the cylindrical in the transverse bore 6 Part of the differential pressure transducer interrupts the channel 14.
- the Differential pressure transducer 7 is sealing on the mounting base 8 appropriate.
- the one shown in Fig. 1 from the back Differential pressure transducer 7 also has a flat surface he on the corresponding flat surface of the mounting base 8 is flanged, a cylindrical projecting forward Part that dips into the transverse bore 16 and the channel 14 interrupts.
- differential pressure transducer 7 When the differential pressure transducer 7 is mounted, it is above that separate channel 14 to one side of the pressure side and to the other Side of the suction side pressure. If the differential pressure sensor 7 should not be installed, is in its place Provide blind plug that interrupts the channel 14 and the Closes transverse bore 16 to the outside.
- connections 17 lie within the transverse bore 16 for the pressure measurement, 3 differs in that the Connections 17 for pressure measurement to a mounting surface 18 as Mounting base are brought out.
- the lines are through a Tube 19 or more cast tubes 21 are formed.
- the in the Figures 4 and 5 indicated mounting surface lies in one plane parallel to the cutting plane, the connections 17 are by the Machining the mounting surface 18 formed open ends of the cast pipe 19 or cast pipes 21 is formed.
- the pipes shown in FIG. 3 can be cast in this way be that they each have one end in the suction or pressure chamber 12, 13 and end at the other end in the mounting surface 18, which has to be reworked in any case, e.g. B. by milling, but these line connections can also are formed differently, as follows based on the figures 4 and 5 should be clarified.
- the pump housing in still shows not finished machined state - the mounting surface 18 is not yet processed - is a continuous tube 19 in the Poured housing that from the suction chamber of the pump through the Rib 15 of the housing is guided, then the later mounting surface 18 forming plane, there is a pinch 20 and then interspersed this level to finally lead to the pressure room.
- the one formed by the pipe Line connection between suction chamber and pressure chamber is through the pinch 20 interrupted.
- the housing should have a mounting base, so the mounting surface 18 is processed accordingly, d. H. face milled or similar. It also becomes the one in this area lying part of the tube 19 and also the pinch 20 removed so that the mounting surface 18 with connections 17 to Pressure chamber or suction chamber is formed.
- a continuous poured tube 19 instead of a continuous poured tube 19 also cast two individual tubes 21 be one of which from the pressure chamber through the rib 15 to is led beyond the level in which the future mounting surface 18 should lie, and there also has a pinch 20.
- the other tube 21 is guided to the pressure port accordingly.
- the pinches 20 on the assembly-side ends of the tubes 21 are only required here to ensure that material flows in to prevent in the pipes during the casting process. Also at this version will be the bruises during processing the mounting surface 18 removed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Measuring Fluid Pressure (AREA)
Description
Die Erfindung betrifft ein Gehäuse für eine Kreiselpumpe.The invention relates to a housing for a centrifugal pump.
Kreiselpumpenaggregate mit einem Gehäuse der vorerwähnten Art sind bekannt, beispielsweise mehrstufige Hochdruck-Kreiselpumpen der Grundfos-Baureihe CR/CP oder Heizungsumwälzpumpen des Grundfos-Typs DN 32-100. Derartige moderne Pumpenaggregate sind drehzahlregelbar. Zur Erfassung der für die Regelung erforderlichen Ist-Größen bedarf es einer Druckmessung saugseitig und druckseitig. Um dies unabhängig von Einbauort und Einbaulage zu gewährleisten, ist es bekannt, im Gehäuse derartiger Kreiselpumpen Anschlüsse für die Druckmessung an der Saug- und an der Druckseite vorzusehen. Es handelt sich hierbei in der Regel um seitliche Bohrungen im Druckstutzen sowie im Saugstutzen. Bei der Montage des Pumpenaggregates wird an diesen Anschlüssen über eine geeignete Verrohrung ein Differenzdruckaufnehmer angeschlossen, der die entsprechenden Drücke erfaßt und in Form elektrischer Signale an die Regelung weiterleitet.Centrifugal pump units with a housing of the aforementioned type are known, for example multi-stage high-pressure centrifugal pumps the Grundfos CR / CP series or heating circulation pumps of the Grundfos type DN 32-100. Such modern pump sets are speed controllable. To capture the for regulation required actual sizes, a pressure measurement on the suction side is required and pressure side. To do this regardless of the installation location and installation position to ensure it is known in the housing of such centrifugal pumps Connections for pressure measurement on the suction and on on the pressure side. This is usually the case around lateral bores in the pressure port and in the suction port. When assembling the pump set, these connections are made a differential pressure transducer via suitable piping connected, which detects the corresponding pressures and in the form forwards electrical signals to the control system.
Der Differenzdruckaufnehmer ist bei diesen bekannten Kreiselpumpengehäusen extern angeordnet und entweder herstellerseitig oder vor Ort bei der Montage über eine entsprechende Verrohrung oder Schlauchverbindungen mit den Gehäuseanschlüssen zu verbinden.The differential pressure sensor is in these known centrifugal pump housings arranged externally and either by the manufacturer or on site during installation using appropriate piping or hose connections to the housing connections connect.
Im übrigen ist es bekannt, zwischen Saugseite und Druckseite einer Kreiselpumpe im Pumpengehäuse einen mittels eines Drosselventiles absperrbaren Kanal vorzusehen. Durch Öffnen des Drosselventiles wird ein Bypass geschaffen, der den Förderdruck der Pumpe vermindert. Eine solche Bypassteuerung wird bei einfachen, ungeregelten Heizungsumwälzpumpenaggregaten eingesetzt, um Strömungsgeräusche in der Heizungsanlage zu reduzieren. Ein solcher Bypass vermindert den Wirkungsgrad der Pumpe erheblich.Otherwise, it is known between the suction side and pressure side a centrifugal pump in the pump housing one by means of a throttle valve lockable channel to be provided. By opening the Throttle valves create a bypass that the delivery pressure the pump is reduced. Such a bypass control is used for simple, unregulated heating circulation pump units used, to reduce flow noise in the heating system. Such a bypass reduces the efficiency of the pump considerably.
Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, ein Gehäuse der eingangs erwähnten Art so weiterzubilden, daß die Herstellungs- und Montagekosten des Pumpenaggregates insbesondere für drehzahlgeregelte Heizungsumwälzpumpen in der Mittel- und Großserienfertigung gesenkt werden können.Based on this prior art, the invention lies Task based on a housing of the type mentioned above to further that the manufacturing and assembly costs of Pump units, in particular for speed-controlled heating circulation pumps reduced in medium and large series production can be.
Diese Aufgabe wird gemäß der Erfindung durch die im
Anspruch 1 vorgesehenen Merkmale gelöst.
Demgemäß sieht die Erfindung vor, die Anschlüsse zur
Druckmessung an einer am Pumpengehäuse vorgesehenen Montagebasis
anzuordnen, welche zum Anschluß eines Differenzdruckaufnehmers
vorgesehen ist, wobei die Leitungsverbindungen zu diesen
Anschlüssen durch innerhalb des Gehäuses liegende und an der
Montagebasis mündende Kanäle gebildet sind.This object is achieved according to the invention by the
Die erfindungsgemäße Ausbildung hat den Vorteil, daß der Differenzdruckaufnehmer unmittelbar am Pumpengehäuse montierbar ist, und zwar ohne jede weitere Verrohrung. Damit kann die Montage und der Anschluß des Differenzdruckaufnehmers sowie der elektrische Anschluß zur üblicherweise im Klemmenkasten des Pumpenaggregates angeordneten Regelelektronik in einfacher Weise bei der Pumpenherstellung und Montage erfolgen, so daß die bisherige zeitaufwendige Verrohrung und externe Montage vollständig entfällt. Die herstellerseitige Montage des Differenzdruckaufnehmers kann bei der erfindungsgemäßen Gehäuseausbildung mittels Handhabungsautomaten schnell und kostengünstig erfolgen. Ferner entfällt das Risiko von Fehlanschlüssen bei Einbau und Montage der Pumpe vor Ort.The training according to the invention has the advantage that the differential pressure sensor Can be mounted directly on the pump housing without any further piping. So that Installation and connection of the differential pressure sensor as well the electrical connection to the usually in the terminal box of the Pump unit arranged control electronics in simple Way in pump manufacture and assembly, so that the previous time-consuming piping and external installation completely eliminated. The manufacturer's installation of the differential pressure sensor can in the housing design according to the invention using handling machines quickly and inexpensively respectively. Furthermore, there is no risk of incorrect connections during installation and assembly of the pump on site.
Herstellungstechnisch besonders einfach und kostengünstig ist es, die Leitungen zu den Druckmeßanschlüssen durch einen gemeinsamen Kanal zu bilden, der innerhalb des Gehäuses Saug- und Druckseite miteinander verbindet und der mittels des montierten Differenzdruckaufnehmers trennbar ist. Der Differenzdruckaufnehmer kann dabei in einer den Kanal unterteilenden Querbohrung sitzen, die fertigungstechnisch günstig herzustellen ist. Darüberhinaus kann bei dieser Ausbildung das Gehäuse auch für ungeregelte oder anders geregelte Aggregate eingesetzt werden, wenn anstelle des Differenzdruckaufnehmers ein Blindstopfen eingesetzt wird.It is particularly simple and inexpensive to manufacture, the lines to the pressure measuring connections through a common Form channel that is suction and inside the housing Connects pressure side with each other and that by means of the assembled Differential pressure transducer is separable. The differential pressure sensor can be in a cross hole dividing the channel sit, which is cheap to manufacture technically. Furthermore can with this training the housing for unregulated or differently regulated units are used, if a blind plug instead of the differential pressure sensor is used.
Wenn das Gehäuse aus Guß besteht, können die Leitungen durch entsprechende Ausbildung des Kerns innerhalb des Gehäuses gebildet werden. Besonders vorteilhaft ist es, wenn die Leitungen in der Teilungsebene des Kernkastens liegen und somit einstückig mit dem Kern gefertigt werden können. Insbesondere dann, wenn die Leitungen nur einen geringen Durchmesser aufweisen, kann dies jedoch bei Gußkonstruktion problematisch sein. Für diese Fälle sieht die Erfindung eine Weiterbildung dahingehend vor, daß innerhalb des Gehäuses ein Rohr oder mehrere eingegossen sind, welche die Leitungen zu den Druckmeßanschlüssen bilden.If the housing is made of cast iron, the cables can pass through appropriate design of the core within the housing be formed. It is particularly advantageous if the lines lie in the division plane of the core box and thus in one piece can be made with the core. Especially if the lines can only have a small diameter however, this can be problematic with cast construction. For this In cases, the invention provides further training in that that one or more pipes are cast in the housing are, which form the lines to the pressure measuring connections.
Da für die Bildung der Montagebasis in der Regel eine materialabtragende Bearbeitung an mindestens einer Anschlußfläche des Gehäuses erforderlich sein wird, kann gemäß einer Weiterbildung der Erfindung ein gemeinsames Rohr zur Bildung beider Leitungen zu den Druckmeßanschlüssen in das Gehäuse eingegossen sein. Dieses Rohr ist dann an einer vorbestimmten Stelle, beispielsweise durch eine Abquetschung im Leitungsdurchgang, blockiert. Soll das Gehäuse für Pumpenaggregate ohne Differenzdruckaufnehmer verwendet werden, so bleibt es unbearbeitet und damit der durch das Rohr gebildete Kanal blockiert. Wenn hingegen ein Differenzdruckaufnehmer angeschlossen werden soll, erfolgt eine materialabhebende Bearbeitung des Gehäuses im Bereich der Montagebasis. Diese Bearbeitung ist dabei so ausgelegt, daß dabei die Druckanschlüsse durch Öffnen der Rohrleitung gebildet werden. Anstelle eines beide Leitungen bildenden gemeinsamen Rohres können auch zwei getrennte und endseitig im Leitungsdurchgang blockierte Rohre eingegossen werden, die bei der späteren Bearbeitung der Montagebasis zur Bildung der Druckmeßanschlüsse sowie zur Leitungsverbindung mit der Saugseite bzw. Druckseite geöffnet werden.As a rule, a material-removing for the formation of the assembly base Machining on at least one pad of the Housing will be required, according to a training the invention a common tube to form both lines poured into the housing to the pressure measuring connections his. This tube is then at a predetermined location, for example by squeezing in the line passage, blocked. Should the housing for pump units without differential pressure transducer used, it remains unprocessed and so that the channel formed by the pipe is blocked. If on the other hand a differential pressure transducer is to be connected, there is a material-lifting processing of the housing in the Area of the mounting base. This processing is designed so that the pressure connections by opening the pipeline be formed. Instead of a common line forming both lines Pipe can also have two separate ends Pipe blocked pipes are poured in the later processing of the assembly base to form the Pressure measurement connections and for line connection to the suction side or print page can be opened.
Bei Inline-Pumpen mit Gußgehäuse ist es von Vorteil, die Leitungen zu den Druckmeßanschlüssen in einer Rippe zwischen Druckflansch und Saugseite des Pumpengehäuses anzuordnen und die Montagebasis an dieser Rippe vorzusehen.For inline pumps with a cast housing, it is advantageous to use the lines to the pressure measuring connections in a rib between the pressure flange and to arrange the suction side of the pump housing and the Mounting base to be provided on this rib.
Die Erfindung ist nachfolgend anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Es zeigen:
- Fig. 1
- in vereinfachter perspektivischer Darstellung ein Pumpengehäuse mit Montagebasis und zugehörigem Differenzdruckaufnehmer in beabstandeter Stellung vor der Montage,
- Fig. 2
- einen Längsschnitt durch ein Pumpenaggregat mit einem Gehäuse gemäß Fig. 1,
- Fig. 3
- eine Ausführungsvariante, bei der die Leitungen zu den Druckmeßanschlüssen durch ein eingegossenes Rohr gebildet sind in Darstellung nach Fig. 2,
- Fig. 4
- eine teilweise im Schnitt dargestellte Ansicht entsprechend der Pfeilrichtung IV, V in Fig. 1 der Ausführungsvariante nach Fig. 3 vor Bearbeitung der Montagebasis und
- Fig. 5
- eine Konstruktionsalternative in Darstellung nach Fig. 4.
- Fig. 1
- a simplified perspective view of a pump housing with a mounting base and associated differential pressure sensor in a spaced-apart position before assembly,
- Fig. 2
- 2 shows a longitudinal section through a pump unit with a housing according to FIG. 1,
- Fig. 3
- 1 shows an embodiment variant in which the lines to the pressure measuring connections are formed by a cast-in tube in the illustration according to FIG. 2,
- Fig. 4
- a partially shown in section according to the direction of arrow IV, V in Fig. 1 of the embodiment of FIG. 3 before machining the mounting base and
- Fig. 5
- 4 shows a construction alternative in the illustration according to FIG. 4.
Das in Fig. 1 dargestellte Kreiselpumpengehäuse 1 ist Teil des in
Fig. 2 im Schnitt dargestellten Heizungsumwälzpumpenaggregates,
bestehend aus dem Pumpengehäuse 1, dem Motorgehäuse 2, dem
Motor 3 und dem von seiner Welle 4 angetriebenen Kreiselrad 5.
Das Motorgehäuse 2 ist am Pumpengehäuse 1 schraubbefestigt, es
weist einen Klemmenkasten 6 auf, in dem ein Frequenzumrichter
sowie die Regelelektronik für den Motor 3 integriert sind. Die
Regelelektronik ist elektrisch mit einem Differenzdruckaufnehmer
7 verbunden, der in Fig. 1 als Anbaumodul dargestellt ist und der
an einer Montagebasis 8 des Pumpengehäuses 1 unmittelbar befestigt
ist. The
Das dargestellte Pumpengehäuse 1 ist Teil einer Inline-Pumpe, bei
der Saugstutzen 9 und Druckstutzen 10 achsgleich angeordnet
sind. Die Stutzen 9, 10 sind in der dargestellten Ausführung als
Anschlußflansche ausgebildet. Innerhalb der Flansche sind zwei
Anschlüsse 11 zur Druckmessung vorgesehen, wie dies auch bisher
bei Pumpenaggregaten dieser Art vorgesehen wurde. Beim Einsatz
des Gehäuses in Verbindung mit einem an der Montagebasis 8
angeflanschten Differenzdruckaufnehmer 7 werden diese Anschlüsse
11 durch nicht dargestellte Stopfen verschlossen. Im übrigen
können hieran gegebenenfalls weitere Meßwertaufnehmer oder
auch ein Differenzdruckmesser konventioneller externer Bauart
angeschlossen werden. Auf diese Weise kann ein solches Pumpengehäuse
auch für Pumpenaggregate nach dem Stand der Technik
eingesetzt werden.The
Der Saugstutzen 9 führt zum Saugraum 12 und der Druckstutzen
10 zum Druckraum 13 der Pumpe. Druckraum 13 und Saugraum
12 sind durch einen Kanal 14 miteinander verbunden, der innerhalb
einer Rippe 15 des Gehäuses angeordnet ist. Der Kanal 14
ist durch eine Querbohrung 16 größeren Durchmessers durchsetzt,
welche Teil der Montagebasis 8 bildet und entweder als Sackloch
oder als Durchgangsbohrung ausgebildet ist. Diese Bohrung 16 ist
zur Aufnahme des Differenzdruckaufnehmers vorgesehen, und
zwar derart, daß der in die Querbohrung 6 reichende zylindrische
Teil des Differenzdruckaufnehmers den Kanal 14 unterbricht. Der
Differenzdruckaufnehmer 7 ist dichtend an der Montagebasis 8
angebracht. Der in Fig. 1 von der Rückseite her dargestellte
Differenzdruckaufnehmer 7 weist also neben einer Planfläche, mit
der er an der korrespondierenden Planfläche der Montagebasis 8
angeflanscht ist, einen nach vorn vorspringenden zylindrischen
Teil auf, der in die Querbohrung 16 eintaucht und den Kanal 14
unterbricht. The
Bei montiertem Differenzdruckaufnehmer 7 liegt über dem dann
getrennten Kanal 14 zu einer Seite der druckseitige und zur anderen
Seite der saugseitige Druck an. Wenn der Differenzdruckaufnehmer
7 nicht montiert werden soll, ist an seiner Stelle ein
Blindstopfen vorzusehen, der den Kanal 14 unterbricht und die
Querbohrung 16 nach außen hin verschließt.When the
Während bei der vorbeschriebenen Ausführungsform die Anschlüsse
17 für die Druckmessung innerhalb der Querbohrung 16 liegen,
unterscheidet sich die Ausführung nach Fig. 3 dadurch, daß die
Anschlüsse 17 zur Druckmessung zu einer Montagefläche 18 als
Montagebasis herausgeführt sind. Die Leitungen sind durch ein
Rohr 19 oder mehrere eingegossene Rohre 21 gebildet. Die in den
Figuren 4 und 5 angedeutete Montagefläche liegt in einer Ebene
parallel zur Schnittebene, die Anschlüsse 17 sind durch die nach
Bearbeitung der Montagefläche 18 gebildeten offenen Enden des
eingegossenen Rohres 19 bzw. der eingegossenen Rohre 21 gebildet.
Zwar können die in Fig. 3 dargestellten Rohre so eingegossen
werden, daß sie jeweils mit einem Ende im Saug- bzw. Druckraum
12, 13 und mit dem anderen Ende in der Montagefläche 18 enden,
die in jedem Fall materialabtragend nachbearbeitet werden muß,
z. B. durch Fräsen, doch können diese Leitungsverbindungen auch
anders gebildet werden, wie dies nachfolgend anhand der Figuren
4 und 5 verdeutlicht werden soll.While in the embodiment described above, the connections
17 lie within the transverse bore 16 for the pressure measurement,
3 differs in that the
Connections 17 for pressure measurement to a mounting
Bei der Ausführung nach Fig. 4, die das Pumpengehäuse in noch
nicht fertig bearbeitetem Zustand zeigt - die Montagefläche 18 ist
noch nicht bearbeitet -, ist ein durchgehendes Rohr 19 in das
Gehäuse eingegossen, das vom Saugraum der Pumpe durch die
Rippe 15 des Gehäuses geführt ist, dann eine die spätere Montagefläche
18 bildende Ebene durchsetzt, dort eine Abquetschung 20
aufweist und dann diese Ebene wiederum durchsetzt, um schließlich
zum Druckraum zu führen. Die durch das Rohr gebildete
Leitungsverbindung zwischen Saugraum und Druckraum ist durch
die Abquetschung 20 unterbrochen. Wenn das so gebildete Gehäuse
ohne weitere Verarbeitung, insbesondere der Montagefläche 18,
verwendet wird, kann es beispielsweise als Ersatzteil für ein Gehäuse
nach dem Stand der Technik Verwendung finden, bei dem
entweder ein Differenzdruckaufnehmer nicht vorgesehen ist oder
aber der Anschluß über eine Verrohrung an den Anschlüssen 11
erfolgt. Soll hingegen das Gehäuse eine Montagebasis aufweisen,
so wird die Montagefläche 18 entsprechend bearbeitet, d. h. plangefräst
oder dergleichen. Dabei wird zugleich der in diesem Bereich
liegende Teil des Rohres 19 und auch die Abquetschung 20
entfernt, so daß die Montagefläche 18 mit Anschlüssen 17 zum
Druckraum bzw. Saugraum gebildet wird.4, the pump housing in still
shows not finished machined state - the mounting
Wie in Fig. 5 dargestellt, können anstelle eines durchgehenden
eingegossenen Rohres 19 auch zwei Einzelrohre 21 eingegossen
sein, von denen eines vom Druckraum durch die Rippe 15 bis
jenseits der Ebene geführt ist, in der die spätere Montagefläche
18 liegen soll, und dort ebenfalls eine Abquetschung 20 aufweist.
Das andere Rohr 21 ist entsprechend zum Druckstutzen geführt.
Die Abquetschungen 20 an den montageseitigen Enden der Rohre
21 sind hier lediglich erforderlich, um ein Einfließen von Material
in die Rohre während des Gußvorganges zu verhindern. Auch bei
dieser Ausführung werden die Abquetschungen bei der Bearbeitung
der Montagefläche 18 entfernt. As shown in Fig. 5, instead of a continuous
poured
- 1 -1 -
- KreiselpumpengehäuseCentrifugal pump housing
- 2 -2 -
- MotorgehäuseMotor housing
- 3 -3 -
- Motorengine
- 4 -4 -
- Wellewave
- 5 -5 -
- KreiselradGyro wheel
- 6 -6 -
- KlemmenkastenTerminal box
- 7 -7 -
- DifferenzdruckaufnehmerDifferential pressure transducer
- 8 -8th -
- MontagebasisMounting base
- 9 -9 -
- SaugstutzenSuction port
- 10 -10 -
- DruckstutzenDischarge nozzle
- 11 -11 -
- Anschlüsse zur DruckmessungPressure measurement connections
- 12 -12 -
- SaugraumSuction chamber
- 13 -13 -
- DruckraumPressure room
- 14 -14 -
- Kanalchannel
- 15 -15 -
- Ripperib
- 16 -16 -
- QuerbohrungCross hole
- 17 -17 -
- Anschlüsse zur DruckmessungPressure measurement connections
- 18 -18 -
- MontageflächeMounting surface
- 19 -19 -
- eingegossenes Rohrcast pipe
- 20 -20 -
- AbquetschungCrushing
- 21 -21 -
- eingegossene Rohrecast pipes
Claims (7)
- A casing for a centrifugal pump with a suction-side and a pressure-side conduit connection (9, 10) as well as with connections (17) for the pressure measurement on the suction side and the pressure side, wherein the connections (17) for the pressure measurement are arranged on an assembly base (8) which is provided on the pump casing (8) and which is provided for the connection of a differential pressure sensor (7), and wherein the conduits to these connections are formed by channels (14) lying within the casing and opening at the assembly base (8, 18).
- A casing according to claim 1, characterised in that the conduits to the pressure measurement connections (17) are formed by a channel (14) which connects a suction side and pressure side and which is separated by the assembled differential pressure sensor (7).
- A casing according to claim 1 or 2, characterised in that the channel (14) connecting the suction and pressure side (12, 13) is projected through by a transverse bore (16) which is accessible from the casing outer side and into which the differential pressure sensor (7) may be sealingly applied.
- A casing according to one of the preceding claims, characterised in that the casing (1) is a cast casing and that the conduits to the pressure measurement connections (17) are formed by at least one pipe (19) cast into the casing wall (15).
- A casing according to one of the preceding claims, characterised in that the conduits to the pressure measurement connections (17) are formed by a common pipe (19) which is cast into the casing wall and which comprises a location (20) blocking the conduit passage, and that the pressure connections (17) with the machining of the assembly base (18) are formed by opening the pipe conduit.
- A casing according to one of the preceding claims, characterised in that the conduits to the pressure measurement connections (17) are formed by pipes (21) cast into the casing wall (15), which in each case at the end side comprise a location (2) blocking the conduit passage, and that the pressure connections (17) on machining the assembly base (18) are formed by opening the pipe conduits.
- A casing according to one of the preceding claims, characterised in that the conduits to the pressure measurement connections (17) lie in a rib (15) between the pressure flange (19) and the suction side (12) of the pump casing (1), the assembly base (8, 18) being provided on this rib.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19544173A DE19544173C1 (en) | 1995-11-14 | 1995-11-14 | Housing for a centrifugal pump |
| DE19544173 | 1995-11-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0774583A1 EP0774583A1 (en) | 1997-05-21 |
| EP0774583B1 true EP0774583B1 (en) | 2000-09-13 |
Family
ID=7778523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96117898A Expired - Lifetime EP0774583B1 (en) | 1995-11-14 | 1996-11-08 | Casing for a centrifugal pump |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0774583B1 (en) |
| DE (2) | DE19544173C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12092117B2 (en) | 2018-09-11 | 2024-09-17 | Xylem Europe Gmbh | Centrifugal pump unit |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19700965C1 (en) * | 1997-01-14 | 1998-06-04 | Grundfos As | Sensor arrangement |
| DE10035458C2 (en) * | 1999-08-02 | 2002-10-24 | Wilo Gmbh | Combined probe |
| DE10028951A1 (en) * | 2000-06-16 | 2002-01-03 | Grundfos As | Axial sliding bearing for a wet running centrifugal pump |
| DE10039917A1 (en) * | 2000-08-16 | 2002-02-28 | Ksb Ag | Method and device for determining the delivery rate of a centrifugal pump |
| DE10249129A1 (en) * | 2002-10-22 | 2004-06-03 | Wilo Ag | Pump with sensor in the pump housing |
| DE10249128A1 (en) * | 2002-10-22 | 2004-06-03 | Wilo Ag | Pump with connecting lines to measuring points |
| DE102005057858A1 (en) | 2005-12-03 | 2007-06-06 | Wilo Ag | Pump housing with 2-point mounting |
| DE102008017536A1 (en) * | 2008-04-03 | 2009-10-08 | Ebm-Papst Landshut Gmbh | Method for integrating a pressure transducer into the housing of a fan |
| EP2626567B2 (en) * | 2012-02-08 | 2019-10-16 | Grundfos Holding A/S | Pump casing |
| DE102015014224B4 (en) | 2015-11-04 | 2019-03-07 | Thomas Magnete Gmbh | A motor pump assembly |
| CA3151399A1 (en) | 2019-09-18 | 2021-03-25 | Jonathan Alvin ARULKUMAR | A sensing device, system and method for a pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB997863A (en) * | 1962-07-24 | 1965-07-07 | B S A Harford Pumps Ltd | Improvements relating to centrifugal pumps |
| JPS6140489A (en) * | 1984-08-02 | 1986-02-26 | Ebara Corp | Flow measuring method of pump |
| DE3642729C3 (en) * | 1986-12-13 | 1997-05-07 | Grundfos Int | Pump unit for conveying liquids or gases |
| DE3923027A1 (en) * | 1989-07-13 | 1991-01-17 | Oplaender Wilo Werk Gmbh | Pump speed adjustment device for central heating installation - has differential pressure switch in parallel with manometer for instigating alarm and shut-down |
| US5129264A (en) * | 1990-12-07 | 1992-07-14 | Goulds Pumps, Incorporated | Centrifugal pump with flow measurement |
| IT1257704B (en) * | 1991-12-05 | 1996-02-01 | Nocchi Pompe Spa | MULTI-FUNCTIONAL WATER PUMP: CENTRIFUGAL, FOR DEEP SUCTION, SELF-PRIMING, CENTRIFUGAL WITH PRESSURE REGULATION, SELF-PRIMING WITH PRESSURE REGULATION, WITH STARTING DEVICE AND / OR AUTOMATIC STOP |
-
1995
- 1995-11-14 DE DE19544173A patent/DE19544173C1/en not_active Expired - Fee Related
-
1996
- 1996-11-08 EP EP96117898A patent/EP0774583B1/en not_active Expired - Lifetime
- 1996-11-08 DE DE59605874T patent/DE59605874D1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12092117B2 (en) | 2018-09-11 | 2024-09-17 | Xylem Europe Gmbh | Centrifugal pump unit |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19544173C1 (en) | 1997-06-05 |
| DE59605874D1 (en) | 2000-10-19 |
| EP0774583A1 (en) | 1997-05-21 |
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