EP1079115A2 - Pump casing made of plastic - Google Patents
Pump casing made of plastic Download PDFInfo
- Publication number
- EP1079115A2 EP1079115A2 EP00116683A EP00116683A EP1079115A2 EP 1079115 A2 EP1079115 A2 EP 1079115A2 EP 00116683 A EP00116683 A EP 00116683A EP 00116683 A EP00116683 A EP 00116683A EP 1079115 A2 EP1079115 A2 EP 1079115A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- centrifugal pump
- pump according
- housing
- pump housing
- inlet
- 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
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
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
- F05D2300/433—Polyamides, e.g. NYLON
Definitions
- the present invention relates to a centrifugal pump operated by an electric motor for conveying process water in building supply systems, with a motor housing surrounding the electric motor and with a pump housing which covers an impeller chamber which accommodates the impeller on the end face and which has an inlet channel which opens into an inlet connection, and which has an outlet channel which is in particular coaxial ( in-line ”) to the outlet port arranged outlet port.
- Centrifugal pumps with such pump housings have been around for a long time well known.
- high pressures with pressure peaks of up to 30 bar to be able to withstand the pump housings of these pumps known to be made of corrosion-resistant metal in particular cast from a special copper alloy.
- Such cast or pressed metal housing with molded nozzle for connection to the pipelines are resistant and also guarantee high operational reliability of the pumps with the high pressures that occur in service water circuits.
- a disadvantage of the known domestic water pumps with pump housings is made of metal that the housing because of the high Material costs and because of the complex manufacturing process are comparatively expensive. Thats how it is suppost to be cast or pressed metal housing with cutting Processes, for example by drilling, milling or turning, to be reworked to its final form. In addition to the Material costs thus burden the manufacturing costs Pump price.
- the object of the present invention is no longer one for suitable centrifugal pump for use in service water systems create, the pump housing is inexpensive and at simple manufacturing, great resistance to has high pressures and pressure peaks.
- the one-piece plastic pump housing has first of all the great advantage that it is compared to the previously known metal housings because of the cheaper material and because of the simpler manufacturing process is cheaper. In particular, in the manufacture completely without machining become.
- the entire pump housing can be used according to the invention all the ducting in it in just one Spraying process can be made. It is injection mold required advantageously designed so that the pump housing with only a single injection point is injected. A particularly high strength of the Pump housing and thus a great reliability of the Centrifugal pump can be reached.
- the housing according to the invention is particularly light and yet suitable in service water pumps to be used and the pressure peaks that occur withstand up to 30 bar.
- this Pump housing a cylindrical covering the impeller chamber Cover part, which is surrounded by an external thread and the to hold the pump housing in a corresponding on Motor housing internal thread is screwed.
- This type of connection is particularly stable and contributes to Increase the strength of the pump.
- the thread can be in particular with about 67 mm outer diameter and about 2.5 mm Dimension the slope so that the pump housing in the previously used motor housing is screwable. Consequently the pumps on the market can be easily retrofit with the plastic housing according to the invention.
- the front especially the cover with the direct molded connection piece, with star-shaped arrangement Stiffening ribs provided that the inlet channel and Hold the outlet duct at least up to the height of its axis.
- Stiffening ribs create an additional connection between the channels on the one hand and the lid-shaped pump housing or the cover part on the other. They improve the Stability of the pump housing.
- the stiffening ribs are as stated, aligned radially or in a star shape and cover the housing or the cover part like a dome Inclusion of the molded channels.
- the injection mold designed so that the only injection point on one of the Line channels, especially on the outer wall of the inlet channel is arranged approximately in the center of the pump housing.
- the plastic is distributed during injection almost evenly in a flow direction from the injection point over the reinforcement ribs to the bottom of the housing, without weld lines.
- weld lines occur there where two plastics flow during the spraying process meet. They form weaknesses because of themselves the fibers present in the plastic do not meet these joints interweave, only the plastic flows into each other or the surfaces of the plastic baked together.
- the weld lines form zones less Resilience.
- the webs or ribs formed on the housing thus have on the one hand the purpose of reinforcing and serving the housing on the other hand as lead structures that have a homogeneous distribution ensure the plastic in the injection mold. Because of of the homogeneous flow process in a preferred direction Avoid weld lines and there is a resistant Pump housing from a single source.
- the foot of the inlet duct with the foot of the outlet duct connects and which is almost at the height of the inner diameter on the Outer wall of the outlet channel opens. So the plastic can run directly into the pressure port from the injection point.
- the raised rib offers a special stiffening in the axial direction of the nozzle and thus increases the stability of the pump housing.
- the fiber content can be made of glass or Carbon fibers exist. These plastics stand out through a particularly high strength and rigidity low toughness. They can reach temperatures of up to endured to 240 ° Celsius and also has a high resistance against aggressive chemicals.
- Out Pump housing made of fiber-reinforced plastic can be designed so that they can handle the pressures in question easily withstand.
- connection piece on the outer edge surrounded with a reinforcement ring that is in a special advantageous embodiment made of metal and on the outer circumference of a nozzle is pressed.
- the piping can have internal threads that are located inside the connecting piece, on the pump housing be connected.
- the seal between the Pipelines and the pump housing can be known Way done by sealing material in the screw.
- the internal thread in the connecting piece ensures that previously used in such centrifugal pumps Connection standard can be maintained.
- the support ring serves to absorb tensions within the Connection thread arise.
- the figure shows a pump housing 1 made of a fiber-reinforced Plastic, especially a polyphenylene sulfide is injected.
- the pump housing is on the motor housing one not shown operated by an electric motor Domestic water pump attachable. It covers the impeller the impeller chamber accommodating the centrifugal pump on the front.
- the pump housing 1 has one surrounded by the housing wall Inlet channel 2, which opens into an inlet port 3. about the inlet channel 2 becomes the pump medium in the direction of arrow A central suction mouth of the impeller, not shown.
- the pumping medium conveyed to the outside by the rotating impeller enters an outlet channel 4, which in known Way opens into an outlet 5.
- the entire pump housing is as shown in the figure, from one piece manufactured.
- the inlet connection 3 and the outlet connection 5 are located inline on the axis 6, which is perpendicular to the axis of rotation 7 of the Impeller is arranged.
- Both the collar of the inlet nozzle 3 and the collar the outlet nozzle 5 are of a support ring 8 made of metal surrounded by an additional stability of the screw connection between the pipeline, not shown, and the Trim causes. Point for screwing in the pipes the connecting pieces 3 and 5 have an internal thread 9.
- the pump housing 1 has a cylindrical, the impeller chamber covering cover part 10, to which the nozzle with formed their walls 11 forming the channels 2 and 4 are.
- the walls 11 are arranged radially Stiffening ribs 12 connected to the cover part 10.
- the injection point 13 is approximately centrally on the wall 11 of the inlet channel 3. Zur special stiffening of the pump housing in the axial direction a raised rib 16 is provided.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine von einem
Elektromotor betriebene Kreiselpumpe zur Förderung von
Brauchwasser in Versorgungssystemen von Gebäuden, mit einem
den Elektromotor umgebenden Motorgehäuse und mit einem
Pumpengehäuse, das eine das Laufrad aufnehmende Laufradkammer
stirnseitig bedeckt und das einen Einlaßkanal aufweist, der
in einem Einlaßstutzen mündet, und das einen Auslaßkanal
aufweist, der in einem insbesondere koaxial (
Kreiselpumpen mit derartigen Pumpengehäusen sind seit langem hinlänglich bekannt. Um den in Brauchwassersystemen auftretenden hohen Drücken mit Druckspitzen von bis zu 30 bar widerstehen zu können, werden die Pumpengehäuse dieser Pumpen bekanntermaßen aus korrosionsbeständigem Metall insbesondere aus einer speziellen Kupferlegierung gegossen. Derart gegossene oder gepreßte Metallgehäuse mit angeformten Stutzen zum Anschluß an die Rohrleitungen sind widerstandsfähig und gewährleisten eine hohe Betriebssicherheit der Pumpen auch bei den in Brauchwasserkreisläufen auftreten hohen Drücken. Centrifugal pumps with such pump housings have been around for a long time well known. To that in domestic water systems occurring high pressures with pressure peaks of up to 30 bar to be able to withstand the pump housings of these pumps known to be made of corrosion-resistant metal in particular cast from a special copper alloy. Such cast or pressed metal housing with molded nozzle for connection to the pipelines are resistant and also guarantee high operational reliability of the pumps with the high pressures that occur in service water circuits.
Nachteilig an den bekannten Brauchwasserpumpen mit Pumpengehäusen aus Metall ist, daß die Gehäuse wegen des hohen Materialaufwandes und wegen des aufwendigen Herstellungsverfahrens vergleichsweise kostenaufwendig sind. So muß das gegossene oder gepreßte Metallgehäuse mit spanabhebenden Verfahren, beispielsweise durch Bohren, Fräsen oder Drehen, zu seiner endgültigen Form nachbearbeitet werden. Neben den Materialkosten belasten somit die Herstellungskosten den Preis der Pumpen.A disadvantage of the known domestic water pumps with pump housings is made of metal that the housing because of the high Material costs and because of the complex manufacturing process are comparatively expensive. Thats how it is suppost to be cast or pressed metal housing with cutting Processes, for example by drilling, milling or turning, to be reworked to its final form. In addition to the Material costs thus burden the manufacturing costs Pump price.
Aufgabe der vorliegenden Erfindung ist es ninmehr, eine für den Einsatz in Brauchwassersystemen geeignete Kreiselpumpe zu schaffen, deren Pumpengehäuse kostengünstig ist und die bei einfacher Fertigung eine große Widerstandsfähigkeit gegenüber hohen Drücken und Druckspitzen aufweist.The object of the present invention is no longer one for suitable centrifugal pump for use in service water systems create, the pump housing is inexpensive and at simple manufacturing, great resistance to has high pressures and pressure peaks.
Diese Aufgabe wird durch eine Kreiselpumpe nach Anspruch 1 gelöst.This object is achieved by a centrifugal pump according to claim 1 solved.
Das einstückig aus Kunststoff gefertigte Pumpengehäuse hat zunächst den großen Vorteil, daß es gegenüber den bislang bekannten Metallgehäusen wegen des billigeren Werkstoffes und wegen des einfachereren Herstellungsprozesses wesentlich kostengünstiger ist. Insbesondere kann bei der Herstellung vollständig auf eine spanabhebende Nacharbeitung verzichtet werden. Das gesamte Pumpengehäuse kann erfindungsgemäß mit allen darin befindlichen Leitungskanälen in nur einem einzigen Spritzvorgang hergestellt werden. Dabei ist das benötigte Spritzwerkzeug vorteilhafterweise so ausgebildet, daß das Pumpengehäuse mit nur einem einzigen Anspritzpunkt gespritzt wird. So kann eine besonders hohe Festigkeit des Pumpengehäuses und damit eine große Zuverlässigkeit der Kreiselpumpe erreicht werden. Das erfindungsgemäße Gehäuse ist besonders leicht und dennoch geeignet, in Brauchwasserpumpen eingesetzt zu werden und den auftretenden Druckspitzen von bis zu 30 bar zu widerstehen.The one-piece plastic pump housing has first of all the great advantage that it is compared to the previously known metal housings because of the cheaper material and because of the simpler manufacturing process is cheaper. In particular, in the manufacture completely without machining become. The entire pump housing can be used according to the invention all the ducting in it in just one Spraying process can be made. It is injection mold required advantageously designed so that the pump housing with only a single injection point is injected. A particularly high strength of the Pump housing and thus a great reliability of the Centrifugal pump can be reached. The housing according to the invention is particularly light and yet suitable in service water pumps to be used and the pressure peaks that occur withstand up to 30 bar.
In einer vorteilhaften Ausführungsform der Pumpe weist das Pumpengehäuse ein zylindrisches die Laufradkammer abdeckendes Abdeckteil auf, das von einem Außengewinde umgeben ist und das zur Halterung des Pumpengehäuses in ein entsprechendes am Motorgehäuse befindliches Innengewinde einschraubbar ist. Diese Art der Verbindung ist besonders stabil und trägt zur Erhöhung der Festigkeit der Pumpe bei. Das Gewinde läßt sich insbesondere mit etwa 67 mm Außendurchmesser und etwa 2,5 mm Steigung so dimensionieren, daß das Pumpengehäuse in die bislang verwendeten Motorgehäuse einschraubbar ist. Somit lassen sich die im Markt befindlichen Pumpen auf einfache Art mit dem erfindungsgemäßen Gehäuse aus Kunststoff nachrüsten.In an advantageous embodiment of the pump, this Pump housing a cylindrical covering the impeller chamber Cover part, which is surrounded by an external thread and the to hold the pump housing in a corresponding on Motor housing internal thread is screwed. This type of connection is particularly stable and contributes to Increase the strength of the pump. The thread can be in particular with about 67 mm outer diameter and about 2.5 mm Dimension the slope so that the pump housing in the previously used motor housing is screwable. Consequently the pumps on the market can be easily retrofit with the plastic housing according to the invention.
Um die Festigkeit des Pumpengehäuses weiter zu erhöhen wird die Stirnseite, insbesondere das Abdeckteil mit den direkt angeformten Anschlußstutzen, mit sternförmig angeordneten Versteifungsrippen versehen, die den Einlaßkanal und den Auslaßkanal zumindest bis in die Höhe ihrer Achse einfassen. Diese Rippen schaffen eine zusätzliche Verbindung zwischen den Kanälen einerseits und dem deckelförmigen Pumpengehäuse oder dem Abdeckteil andererseits. Damit verbessern sie die Stabilität des Pumpengehäuses. Die Versteifungsrippen sind, wie dargelegt, radial oder sternförmig ausgerichtet und bedecken das Gehäuse oder das Abdeckteil kuppelartig unter Einschluß der angeformten Kanäle.To further increase the strength of the pump housing the front, especially the cover with the direct molded connection piece, with star-shaped arrangement Stiffening ribs provided that the inlet channel and Hold the outlet duct at least up to the height of its axis. These ribs create an additional connection between the channels on the one hand and the lid-shaped pump housing or the cover part on the other. They improve the Stability of the pump housing. The stiffening ribs are as stated, aligned radially or in a star shape and cover the housing or the cover part like a dome Inclusion of the molded channels.
In einer vorteilhaften Ausführungsform ist das Spritzwerkzeug so konzipiert, daß der einzige Anspritzpunkt auf einem der Leitungskanäle, insbesondere auf der Außenwandung des Einlaßkanals etwa im Zentrum des Pumpengehäuses, angeordnet ist. In diesem Fall verteilt sich der Kunststoff beim Einspritzen nahezu gleichmäßig in einer Fließrichtung vom Anspritzpunkt über die Verstärkungsrippen hin bis zum Boden des Gehäuses, ohne daß Bindenähte entstehen. Solche Bindenähte treten dort auf, wo während des Spritzvorganges zwei Kunststoff ströme aufeinandertreffen. Sie bilden Schwachstellen, da sich an diesen Stoßstellen die im Kunststoff vorhandenen Fasern nicht ineinander verweben können, sondern lediglich der Kunststoff ineinanderfließt oder die Oberflächen des Kunststoffes miteinander verbacken. Die Bindenähte bilden Zonen geringerer Belastungsfähigkeit.In an advantageous embodiment, the injection mold designed so that the only injection point on one of the Line channels, especially on the outer wall of the inlet channel is arranged approximately in the center of the pump housing. In In this case, the plastic is distributed during injection almost evenly in a flow direction from the injection point over the reinforcement ribs to the bottom of the housing, without weld lines. Such weld lines occur there where two plastics flow during the spraying process meet. They form weaknesses because of themselves the fibers present in the plastic do not meet these joints interweave, only the plastic flows into each other or the surfaces of the plastic baked together. The weld lines form zones less Resilience.
Die an das Gehäuse angeformten Stege oder Rippen haben somit einerseits den Zweck, das Gehäuse zu verstärken und dienen andererseits als Leitstrukturen, die eine homogene Verteilung des Kunststoffs in dem Spritzwerkzeug gewährleisten. Wegen des homogenen Fließvorganges in eine Vorzugsrichtung werden Bindenähte vermieden und es entsteht ein widerstandsfähiges Pumpengehäuse aus einem Guß.The webs or ribs formed on the housing thus have on the one hand the purpose of reinforcing and serving the housing on the other hand as lead structures that have a homogeneous distribution ensure the plastic in the injection mold. Because of of the homogeneous flow process in a preferred direction Avoid weld lines and there is a resistant Pump housing from a single source.
Um das Fließen des Kunststoffes vom Anspritzpunkt in den Auslaßstutzen zu begünstigen, ist es vorteilhaft, zwischen beiden Kanälen eine erhabene Verbindungsrippe vorzusehen, die den Fuß des Einlaßkanales mit dem Fuß des Auslaßkanales verbindet und die nahezu in Höhe des Innendurchmessers an der Außenwandung des Auslaßkanales mündet. So kann der Kunstoff vom Anspritzpunkt aus direkt in den Druckstutzen laufen. Neben dem Effekt der Stromleitung bietet die erhabene Rippe eine besondere Versteifung in axialer Richtung der Stutzen und erhöht damit die Stabilität des Pumpengehäuses.In order for the plastic to flow from the injection point into the To favor outlet port, it is advantageous to between provide a raised connecting rib for both channels, the the foot of the inlet duct with the foot of the outlet duct connects and which is almost at the height of the inner diameter on the Outer wall of the outlet channel opens. So the plastic can run directly into the pressure port from the injection point. In addition to the effect of the power line, the raised rib offers a special stiffening in the axial direction of the nozzle and thus increases the stability of the pump housing.
Vorteilhafterweise wird als Kunststoff ein Polyamid (PA) oder ein Polyphenylensulfid (PPS) mit einem Faseranteil von etwa 20 bis 40% verwendet. Dabei kann der Faseranteil aus Glas- oder Kohlefasern bestehen. Diese Kunststoffe zeichnen sich durch eine besonders hohe Festigkeit und Steifigkeit bei geringer Zähigkeit aus. Dabei können sie Temperaturen von bis zu 240° Celsius ertragen und weist zudem eine hohe Beständigkeit gegenüber aggressiven Chemikalien auf. Aus faserverstärktem Kunststoff hergestellte Pumpengehäuse können so konzipiert sein, daß sie die fraglichen Drücke problemlos aushalten.A polyamide (PA) or is advantageously used as the plastic a polyphenylene sulfide (PPS) with a fiber content of about 20 to 40% used. The fiber content can be made of glass or Carbon fibers exist. These plastics stand out through a particularly high strength and rigidity low toughness. They can reach temperatures of up to endured to 240 ° Celsius and also has a high resistance against aggressive chemicals. Out Pump housing made of fiber-reinforced plastic can be designed so that they can handle the pressures in question easily withstand.
Vorteilhafterweise werden die Anschlußstutzen am äußeren Rand mit einem Verstärkungsring umgeben, der in einer besonders vorteilhaften Ausführungsform aus Metall gefertigt und auf den Außenumfang eines Stutzens aufgepreßt ist. In dieser Ausführungsform können die Rohrleitungen über Innengewinde, die sich innerhalb der Anschlußstutzen befinden, an das Pumpengehäuse angeschlossen werden. Die Abdichtung zwischen den Rohrleitungen und dem Pumpengehäuse kann dabei in bekannter Weise durch Dichtmaterial in der Verschraubung geschehen. Durch das Innengewinde in den Anschlußstutzen wird gewährleistet, daß die bislang bei derartigen Kreiselpumpen benutzte Anschlußnorm beibehalten werden kann. Der Stützring dient dabei zur Aufnahme von Spannungen die innerhalb des Anschlußgewindes entstehen.Advantageously, the connection piece on the outer edge surrounded with a reinforcement ring that is in a special advantageous embodiment made of metal and on the outer circumference of a nozzle is pressed. In this embodiment the piping can have internal threads that are located inside the connecting piece, on the pump housing be connected. The seal between the Pipelines and the pump housing can be known Way done by sealing material in the screw. The internal thread in the connecting piece ensures that previously used in such centrifugal pumps Connection standard can be maintained. The support ring serves to absorb tensions within the Connection thread arise.
Mit dem auf den Kragen aufgebrachten Außengewinde ist das Pumpengehäuse auf einfache Art auf das Motorgehäuse aufschraubbar. Die Abdichtung zwischen dem Pumpengehäuse und dem Motorgehäuse geschieht dabei vorteilhafterweise über einen profilierten Dichtring, insbesondere einen O-Ring der in eine entsprechende die Laufradkammer umgebende Nut eingelegt ist. Durch eine derartige Profildichtung werden die Reaktionskräfte auf die Bauteile wegen der größeren Kompressibilität der Profildichtungen im Gegensatz zu Flachringdichtungen verringert. Mit dem Einsatz profilierter Dichtringe läßt sich eine höhere Druckfestigkeit des Pumpengehäuses bei geringeren wandstärken erreichen. Durch das den Kragen umgebende Außengewinde ist gewährleistet, daß die erfindungsgemäßen Pumpengehäuse sich auf alle die bislang verwendeten Pumpen aufschrauben lassen. Eine Vergrößerung des Anschlußgewindes zum Motorflansch ist beim Einsatz der profilierten Dichtringe nicht nötig, so daß der Austausch von im Markt befindlichen Pumpen ermöglicht wird.With the external thread on the collar, that's it Pump housing can be easily screwed onto the motor housing. The seal between the pump housing and the Motor housing is advantageously done via a profiled sealing ring, in particular an O-ring in a corresponding groove surrounding the impeller chamber is inserted. With such a profile seal, the reaction forces on the components because of the greater compressibility of profile seals in contrast to flat ring seals decreased. With the use of profiled sealing rings a higher pressure resistance of the pump housing with lower reach wall thicknesses. Because of the surrounding External thread ensures that the invention Pump housing on all the pumps used so far screw on. An increase in the connection thread to the motor flange is when using the profiled sealing rings not necessary, so that the exchange of those in the market Pumping is made possible.
Eine besondere Ausführungsform des Pumpengehäuses einer erfindungsgemäßen Kreiselpumpe ist in der Figur dargestellt und wird im folgenden näher erklärt.A special embodiment of the pump housing of an inventive Centrifugal pump is shown in the figure and is explained in more detail below.
Die Figur zeigt ein Pumpengehäuse 1 das aus einem faserverstärktem
Kunststoff, insbesondere einem Polyphenylensulfid
gespritzt ist. Das Pumpengehäuse ist auf das Motorgehäuse
einer nicht dargestellten von einem Elektromotor betriebenen
Brauchwasserpumpe aufsetzbar. Dabei bedeckt es die das Laufrad
der Kreiselpumpe aufnehmende Laufradkammer stirnseitig.
Das Pumpengehäuse 1 weist einen von der Gehäusewand umgebenen
Einlaßkanal 2 auf, der in einem Einlaßstutzen 3 mündet. Über
den Einlaßkanal 2 wird das Pumpmedium in Pfeilrichtung A zum
zentralen Saugmund des nicht dargestellten Laufrades geführt.
Das vom sich drehenden Laufrad nach außen beförderte Pumpmedium
tritt in einen Auslaßkanal 4 ein, der in bekannter
Weise in einen Auslaßstutzen 5 mündet. Das gesamte Pumpengehäuse
ist wie in der Figur dargestellt, aus einem Stück
gefertigt. Der Einlaßstutzen 3 und der Auslaßstutzen 5 liegen
inline auf der Achse 6, die senkrecht zur Drehachse 7 des
Laufrades angeordnet ist.The figure shows a pump housing 1 made of a fiber-reinforced
Plastic, especially a polyphenylene sulfide
is injected. The pump housing is on the motor housing
one not shown operated by an electric motor
Domestic water pump attachable. It covers the impeller
the impeller chamber accommodating the centrifugal pump on the front.
The pump housing 1 has one surrounded by the housing wall
Inlet
Sowohl der Kragen des Einlaßstutzens 3 als auch der Kragen
des Auslaßstutzens 5 sind von einem Stützring 8 aus Metall
umgeben, der eine zusätzliche Stabilität der Schraubverbindung
zwischen der nicht dargestellten Rohrleitung und dem
Stutzen bewirkt. Zum Einschrauben der Rohrleitungen weisen
die Anschlußstutzen 3 und 5 ein Innengewinde 9 auf.Both the collar of the inlet nozzle 3 and the collar
the outlet nozzle 5 are of a
Das Pumpengehäuse 1 weist ein zylindrisches, die Laufradkammer
abdeckendes Abdeckteil 10 auf, an das die Stutzen mit
ihren die Kanäle 2 und 4 bildenden Wandungen 11 angeformt
sind. Die Wandungen 11 sind dabei über radial angeordnete
Versteifungsrippen 12 mit dem Abdeckteil 10 verbunden. In
dieser Ausführungsform liegt der Anspritzpunkt 13 etwa
zentral auf der Wandung 11 des Einlaßkanales 3. Zur
besonderen Versteifung des Pumpengehäuses in axialer Richtung
ist eine erhabene Rippe 16 vorgesehen.The pump housing 1 has a cylindrical, the impeller chamber
covering
Zum Aufschrauben des Pumpengehäuses 1 auf das nicht dargestellte
Motorgehäuse ist der Kragen des Abdeckteiles 10 mit
einem Außengewinde 14 versehen. Die Abdichtung zwischen dem
Motorgehäuse und dem Pumpengehäuse erfolgt über einen O-Ring
15, der in eine entsprechende O-Ringnut eingelegt ist, die in
einen Absatz in der Wandung des Abdeckteiles eingeformt ist.To screw the pump housing 1 onto the not shown
Motor housing is the collar of the
Claims (12)
dadurch gekennzeichnet, daß das Pumpengehäuse (1) einstückig aus Kunststoff gefertigt ist.Centrifugal pump operated by an electric motor for conveying process water in the supply systems of buildings, with a motor housing surrounding the electric motor and with a pump housing which covers an impeller chamber accommodating the impeller on the end face and which has an inlet duct which opens into an inlet connection piece and which has an outlet duct in a coaxial (
characterized in that the pump housing (1) is made in one piece from plastic.
dadurch gekennzeichnet, daß das Pumpengehäuse (1) ein Spritzgießteil mit einem einzigen Anspritzpunkt (13) ist.Centrifugal pump according to claim 1,
characterized in that the pump housing (1) is an injection molded part with a single injection point (13).
dadurch gekennzeichnet, daß das Pumpengehäuse (1) ein zylindrisches die Laufradkammer abdeckendes Abdeckteil (10) aufweist, das von einem Außengewinde (14) umgeben ist und das zur Halterung des Pumpengehäuses in ein am Motorgehäuse befindliches Innengewinde einschraubbar ist.Centrifugal pump according to claim 1 or 2,
characterized in that the pump housing (1) has a cylindrical cover part (10) covering the impeller chamber, which is surrounded by an external thread (14) and which can be screwed into an internal thread on the motor housing to hold the pump housing.
dadurch gekennzeichnet, daß die Stirnseite Pumpengehäuses, insbesondere des Abdeckteiles (10) mit sternförmig angeordneten Versteifungsrippen (12) versehen ist, die den Einlaßkanal und den Auslaßkanal zumindest bis in Höhe ihrer Achse einfassen. Centrifugal pump according to one of the preceding claims,
characterized in that the front side of the pump housing, in particular the cover part (10), is provided with stiffening ribs (12) arranged in a star shape, which enclose the inlet duct and the outlet duct at least up to the level of their axis.
gekennzeichnet durch eine erhabene Verbindungsrippe (16), die den Fuß des Einlaßkanales mit dem Fuß des Auslaßkanales verbindet und die nahezu in Höhe des Innendurchmessers an der Außenwandung des Auslaßkanales mündet.Centrifugal pump according to claim 4,
characterized by a raised connecting rib (16) which connects the foot of the inlet duct with the foot of the outlet duct and which opens out at almost the same diameter as the outer wall of the outlet duct.
dadurch gekennzeichnet, daß der Einlaßstutzen (3) und der Auslaßstutzen (5) von einem insbesondere aus Metall geformten Stützring (8) umgeben sind.Centrifugal pump according to one of the preceding claims,
characterized in that the inlet connection (3) and the outlet connection (5) are surrounded by a support ring (8) formed in particular from metal.
dadurch gekennzeichnet, daß der Kunststoff einen Anteil von insbesondere 20% - 30% Glas und/oder Kohlefasern aufweist.Centrifugal pump according to one of the preceding claims,
characterized in that the plastic has a share of in particular 20% - 30% glass and / or carbon fibers.
dadurch gekennzeichnet, daß der Kunststoff ein Polyamid (PA) oder ein Polyphenylensulfid (PPS) ist.Centrifugal pump according to one of the preceding claims,
characterized in that the plastic is a polyamide (PA) or a polyphenylene sulfide (PPS).
gekennzeichnet durch ein Spaltrohr, das den Rotor vom Stator hydraulisch trennt.Centrifugal pump according to one of the preceding claims,
characterized by a can that hydraulically separates the rotor from the stator.
dadurch gekennzeichnet, daß der Anspritzpunkt (13) sich an der Oberfläche des Einlasstutzens (3) oder der Wandungen (2) des Einlaßkanales befindet.Centrifugal pump according to one of the preceding claims,
characterized in that the injection point (13) is located on the surface of the inlet connector (3) or the walls (2) of the inlet channel.
dadurch gekennzeichnet, daß der Einlaßkanal beim Spritzen des Pumpengehäuses von zwei senkrecht aufeinanderstoßenden Kernen geformt wird. Centrifugal pump according to one of the preceding claims,
characterized in that the inlet channel is formed by two vertically abutting cores when the pump housing is sprayed.
dadurch gekennzeichnet, daß in das zylindrische Abdeckteil (10) ein profilierter Dichtring (15), insbesondere ein O-Ring, in eine entsprechend dafür vorgesehene Nut eingelegt ist, der das Pumpengehäuse (1) gegenüber dem Motorgehäuse abdichtet.Centrifugal pump according to one of the preceding claims,
characterized in that a profiled sealing ring (15), in particular an O-ring, is inserted into a correspondingly provided groove in the cylindrical cover part (10), which seals the pump housing (1) with respect to the motor housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19940146 | 1999-08-24 | ||
| DE19940146 | 1999-08-24 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| EP1079115A2 true EP1079115A2 (en) | 2001-02-28 |
| EP1079115A3 EP1079115A3 (en) | 2001-04-18 |
| EP1079115B1 EP1079115B1 (en) | 2005-11-30 |
| EP1079115B2 EP1079115B2 (en) | 2013-04-24 |
Family
ID=7919453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00116683.4A Expired - Lifetime EP1079115B2 (en) | 1999-08-24 | 2000-08-02 | Pump casing made of plastic |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1079115B2 (en) |
| DE (1) | DE50011736D1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002036404A1 (en) * | 2000-11-02 | 2002-05-10 | Lucas Automotive Gmbh | Vacuum brake booster |
| EP2236839A1 (en) | 2009-04-04 | 2010-10-06 | Grundfos Management A/S | Centrifugal pump assembly |
| US9624945B2 (en) | 2013-06-13 | 2017-04-18 | Johnson Electric S.A. | Circulation pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL299318A (en) * | 1900-01-01 | |||
| GB1526940A (en) * | 1975-12-18 | 1978-10-04 | British Gas Corp | Centrifugal liquid pumps |
| DE3011888A1 (en) * | 1980-03-27 | 1981-10-01 | Richard 7066 Baltmannsweiler Halm | In line mounting centrifugal pump - has insert in casing with suction channel coupled to suction opening and to impeller |
| DE3813654A1 (en) * | 1988-04-22 | 1989-11-02 | Licentia Gmbh | Circulation pump |
| EP0919727A1 (en) * | 1997-11-28 | 1999-06-02 | WILO GmbH | Centrifugal motorpump |
-
2000
- 2000-08-02 DE DE50011736T patent/DE50011736D1/en not_active Expired - Lifetime
- 2000-08-02 EP EP00116683.4A patent/EP1079115B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL299318A (en) * | 1900-01-01 | |||
| GB1526940A (en) * | 1975-12-18 | 1978-10-04 | British Gas Corp | Centrifugal liquid pumps |
| DE3011888A1 (en) * | 1980-03-27 | 1981-10-01 | Richard 7066 Baltmannsweiler Halm | In line mounting centrifugal pump - has insert in casing with suction channel coupled to suction opening and to impeller |
| DE3813654A1 (en) * | 1988-04-22 | 1989-11-02 | Licentia Gmbh | Circulation pump |
| EP0919727A1 (en) * | 1997-11-28 | 1999-06-02 | WILO GmbH | Centrifugal motorpump |
Non-Patent Citations (1)
| Title |
|---|
| BUSE F W: "NON-METALLIC PUMPS" , WORLD PUMPS,GB,TRADE AND TECHNICAL PRESS LTD. MORDEN, NR. 5, PAGE(S) 142-145 XP000084075 ISSN: 0262-1762 * das ganze Dokument * * Tabelle 1 * * Seite 1, Spalte 3, Zeile 2 - Zeile 27 * * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002036404A1 (en) * | 2000-11-02 | 2002-05-10 | Lucas Automotive Gmbh | Vacuum brake booster |
| EP2236839A1 (en) | 2009-04-04 | 2010-10-06 | Grundfos Management A/S | Centrifugal pump assembly |
| US9624945B2 (en) | 2013-06-13 | 2017-04-18 | Johnson Electric S.A. | Circulation pump |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1079115B1 (en) | 2005-11-30 |
| EP1079115B2 (en) | 2013-04-24 |
| DE50011736D1 (en) | 2006-01-05 |
| EP1079115A3 (en) | 2001-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE4022467C2 (en) | ||
| DE102007009394A1 (en) | Motor pump unit | |
| WO2009143918A2 (en) | Stator housing assembly for a canned motor | |
| DE10257783B3 (en) | Nozzle arrangement for a high pressure cleaning device comprises a nozzle hose supporting a pot-shaped housing, and displacement devices moving a low and a high pressure nozzle in the housing against and away from a seal connector | |
| EP2706238B1 (en) | Centrifugal pump comprising an impeller protector with an annular groove and a radial seal | |
| EP1079115B2 (en) | Pump casing made of plastic | |
| DE3130286A1 (en) | Pump for delivering fuel from a storage tank to an internal-combustion engine | |
| EP3105380A1 (en) | Fixture having a pivoting outlet | |
| EP3009680A1 (en) | Multi-stage centrifugal pump | |
| DE102005060895B4 (en) | Centrifugal pump for conveying hot and / or slightly outgassing and / or gas-laden media | |
| WO2001038742A1 (en) | Vacuum pump comprising an outlet | |
| WO2007098800A1 (en) | Water pump | |
| EP3105381A1 (en) | Fitting having a pivoting outlet | |
| EP0584106B1 (en) | Multiple flow, liquid ring pump | |
| DE102007025402B4 (en) | Pump for a household appliance | |
| EP1193397B1 (en) | Plastic housing with metal suds | |
| DE19916370A1 (en) | Centrifugal pump | |
| DE3516061A1 (en) | Centrifugal pump | |
| DE102018210207A1 (en) | Impeller pump and water-bearing household appliance with such an impeller pump | |
| DE4330648A1 (en) | Radial pump | |
| EP1466099B1 (en) | Fuel pump | |
| EP2990651A1 (en) | Pump casing | |
| DE102011084831B4 (en) | Delivery unit for delivering fuel | |
| EP0979950B1 (en) | Centrifugal pump with check-valve | |
| DE10317010A1 (en) | Vortex pump, especially a peripheral cyclic pump, with a pump housing and having suction and pressure sockets and at least one rotatable impeller wheel with scoops in its outer region useful for high pressure pumping of liquid media |
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: A2 Designated state(s): DE FR GB IT |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| 17P | Request for examination filed |
Effective date: 20010727 |
|
| AKX | Designation fees paid |
Free format text: DE FR GB IT |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: WILO-SALMSON AG |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: WILO AG |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REF | Corresponds to: |
Ref document number: 50011736 Country of ref document: DE Date of ref document: 20060105 Kind code of ref document: P |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20060109 |
|
| ET | Fr: translation filed | ||
| PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
| PLAX | Notice of opposition and request to file observation + time limit sent |
Free format text: ORIGINAL CODE: EPIDOSNOBS2 |
|
| 26 | Opposition filed |
Opponent name: GRUNDFOS MANAGEMENT A/S Effective date: 20060830 |
|
| PLAF | Information modified related to communication of a notice of opposition and request to file observations + time limit |
Free format text: ORIGINAL CODE: EPIDOSCOBS2 |
|
| PLBB | Reply of patent proprietor to notice(s) of opposition received |
Free format text: ORIGINAL CODE: EPIDOSNOBS3 |
|
| PUAH | Patent maintained in amended form |
Free format text: ORIGINAL CODE: 0009272 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: PATENT MAINTAINED AS AMENDED |
|
| 27A | Patent maintained in amended form |
Effective date: 20130424 |
|
| AK | Designated contracting states |
Kind code of ref document: B2 Designated state(s): DE FR GB IT |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R102 Ref document number: 50011736 Country of ref document: DE Effective date: 20130424 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20140730 Year of fee payment: 15 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20150802 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 17 |
|
| 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: 20150802 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20170719 Year of fee payment: 18 Ref country code: DE Payment date: 20170719 Year of fee payment: 18 Ref country code: FR Payment date: 20170720 Year of fee payment: 18 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 50011736 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190301 Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180802 |
|
| 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: 20180831 |