EP2546525B1 - Circulation pump with spiral housing - Google Patents

Circulation pump with spiral housing Download PDF

Info

Publication number
EP2546525B1
EP2546525B1 EP11005738.7A EP11005738A EP2546525B1 EP 2546525 B1 EP2546525 B1 EP 2546525B1 EP 11005738 A EP11005738 A EP 11005738A EP 2546525 B1 EP2546525 B1 EP 2546525B1
Authority
EP
European Patent Office
Prior art keywords
housing
pump
pump housing
expansion body
centrifugal pump
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.)
Active
Application number
EP11005738.7A
Other languages
German (de)
French (fr)
Other versions
EP2546525A1 (en
Inventor
Enno Hanisch
Reinhard Hembrock
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.)
Oase Pumpen Wuebker Soehne GmbH and Co Maschinenfabrik
Original Assignee
Oase Pumpen Wuebker Soehne GmbH and Co Maschinenfabrik
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oase Pumpen Wuebker Soehne GmbH and Co Maschinenfabrik filed Critical Oase Pumpen Wuebker Soehne GmbH and Co Maschinenfabrik
Priority to EP11005738.7A priority Critical patent/EP2546525B1/en
Priority to US13/543,842 priority patent/US9222476B2/en
Priority to CN201210467996.8A priority patent/CN102954040B/en
Publication of EP2546525A1 publication Critical patent/EP2546525A1/en
Application granted granted Critical
Publication of EP2546525B1 publication Critical patent/EP2546525B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0077—Safety measures
    • 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 present invention relates to a centrifugal pump having a pump housing having a suction port and an outlet port, which are interconnected by a arranged in the pump housing flow space, a arranged in the flow space rotationally driven impeller, a surrounding the outer periphery of the impeller spiral casing and one with the Flow space in fluidly connected expansion body.
  • a centrifugal pump is from the script WO 2004/020835 known. From the Scriptures DE 103 31 602 A1 It is known to provide a centrifugal pump with one or more expansion bodies to protect the shaft of the impeller from frost damage. If the volume of the water in the flow space changes due to the temperature-induced change of the state of matter, the expansion body can flexibly change its shape. In particular, acting on the pump housing or pump parts bending forces and pressures when freezing water can be avoided when the expansion body is compressed by an increasing pressure in the pump housing and in this way the volume increase of the water in the pump housing can be compensated. Flexible and elastic materials such as rubber bladders, closed-cell sponges of flexible material, and the like may be used to make the expansion body.
  • a centrifugal pump is a turbomachine that uses centrifugal force to convey liquids by means of a rotating impeller. Liquid that enters the centrifugal pump via the intake manifold is entrained by the rotating impeller and forced outwards on a circular path. As a result, the liquid in the impeller and entrained by the impeller starts moving and new liquid is sucked into the effective range of the impeller. If the flow of water through the centrifugal pump is disturbed by built-in components, the efficiency of the centrifugal pump will deteriorate.
  • the object is achieved for a generic centrifugal pump by the centrifugal pump has a surrounding the outer periphery of the impeller spiral housing and the spiral housing is formed as a separate from the pump housing one or more parts ausgestaltetes molding.
  • a spiral running in the circumferential direction of the impeller wall can improve the efficiency of the impeller used in the pump.
  • the free cross-section of the flow channel between the outer periphery of the impeller and the inwardly facing surface of the spiral housing in the conveying direction of the pumped water to the outlet opening increases, improved efficiencies can be achieved with the centrifugal pump.
  • volute is designed as a one- or multi-part molded part.
  • a multipart molding can be configured easily plugged together, so that sets no significantly increased installation costs. The easiest way to assemble, however, is when the molding is designed in one piece.
  • the spiral housing in its installed position in the pump housing with the pump housing non-positively and / or positively connected.
  • a non-positive connection for example, clamping - the installation is possible without tools and correspondingly simple.
  • the spiral housing In a positive connection, the spiral housing is held by its shape in its installed position.
  • the spiral housing can be prevented from changing its mounting position in the direction of rotation of the impeller over the service life of the centrifugal pump. Height movements along the axis of rotation of the impeller can be avoided if the overall height of the volute is exactly adapted to the dimensions of the flow space and the volute is supported in the installation position on the inner wall of the pump housing.
  • connection Even with this connection, the assembly is tool-free and thus accordingly Quick and efficient possible by the spiral housing is placed during assembly of the centrifugal pump only in the pump housing, before it is connected to the motor housing.
  • the non-positive and positive connection technology can also be combined with each other to fix a spiral housing in a pump housing in the installed position.
  • the proposed connection techniques are also easily removable in case of repair.
  • the expansion body is arranged in a space adjacent to the flow space in the pump housing and the expansion body separated from the flow space by a wall of the spiral housing.
  • the arrangement of the expansion body outside the flow space an unhindered water flow through the flow space is ensured.
  • the flow space can be optimally designed fluidically, without having to take account of the expansion body. Since the volute surrounds the flow space, can be dispensed with an additional wall when a wall of the volute at the same time forms the boundary to the space for the expansion body.
  • the expansion body is held by the wall in its installed position. This design simplifies the installation of the pump. To mount the centrifugal pump, the expansion body need only be inserted into the pump housing to then place the sprial housing thereon and connect the pump housing to the motor housing.
  • the single-part or multi-part molded part of the spiral housing in its installed position limits flow openings which fluidly connect the expansion body to the flow space.
  • the through-flow openings can be formed exclusively in a wall of the molded part, for example as holes or slits, whereby, however, disturbances in the flow behavior of the water through the flow space can be caused.
  • the flow openings through column form, which forms the spiral housing together with a wall of the pump housing.
  • the gap between a component edge of the spiral housing and the adjacent surface of the pump housing is widened in this embodiment so that, taking into account the possible tolerances always results in a sufficiently sized flow opening , by which a pressure equalization between the flow space and the expansion body is possible to avoid damage to components of the pump by freezing water.
  • a particularly flow-favorable position of a passage gap is located in the abutting region of the volute casing on the intake manifold or the intake, since there the flow conditions of the water are only slightly impaired.
  • the spiral housing on its side facing away from the impeller has one or more projections, with which the volute casing is self-aligning in its installed position on the pump housing.
  • the volute must be installed in the pump housing so that the impeller does not collide with or rub against the surfaces of the volute when rotating. It must also comply with the intended dimensions of the limited by the outer circumference of the impeller and the inner surface of the volute casing free cross section of the flow channel in order to achieve optimum efficiency of the pump. Accordingly, an aligned on the axis of rotation of the impeller centering of the spiral housing in its installed position is required.
  • This centering can be effected by means of projections which are arranged on opposite sides of the spiral housing in relation to the axis of rotation of the impeller.
  • the projections When the projections are supported in their installed position on the pump housing, in particular with a force component transverse to the axis of rotation of the impeller, the projections on the support forces a balance of power, in which the spiral housing is held in its Solleinbauposition in a suitably centered to the axis of rotation of the impeller.
  • the suction opening is connected to the flow space via an intake and the expansion body is designed as an annular member which includes the intake manifold on the outer periphery.
  • the intake manifold bridges a conveying path for the inflowing water from the intake opening to the impeller.
  • the intake manifold is an integral part of the pump housing or a separate component that is inserted into the pump housing.
  • the intake manifold can be used with its length to improve the Einströmungs of the water in the centrifugal pump. By the distance that flows through the sucked by the pump water through the intake, the flow is rectified in this area.
  • Turbulent currents which could disturb the undisturbed flow of the water, are thus reduced or completely avoided. Due to the flow of the impeller from the intake and not directly from the intake, the water flows more uniformly in the impeller, thereby reducing the efficiency losses. Due to the annular design of the expansion body, the intake manifold can be centrally guided through the expansion body and also centered on the impeller. The expansion body can be fully adapted in its shape and position to the shape and position of the impeller, so that a compensation option for phase change pressure differences regardless of the location and the progress of the freezing of the water located in the pump housing results.
  • an inflow funnel is used as a one-piece or multi-part ausgestaltetes molding in an intake, which is positively and / or positively connected in its installed position in the intake manifold with the pump housing.
  • a separate inflow funnel By a separate inflow funnel, the flow behavior of the water in the region of the intake can be further improved and adapted to the flow characteristics of the respective impeller. Due to the funnel shape, it is in particular possible to improve the inflow behavior of the water into the intake opening and to reduce flow vortexes, which result in the vicinity in front of or in the region of the intake opening, or completely avoid. Due to the non-positive and / or positive connection, the molded part can be easily mounted. Depending on the impeller used, it is also possible to use in an identical pump housing one of several different impellers and one of several matching different inflow funnels, thus resulting in a kind of kit for the configuration of a centrifugal pump of different components.
  • the self-aligning support of the inflow funnel there are the corresponding advantages, as already explained above for the self-aligning support of the spiral housing.
  • a centrifugal pump 2 with a pump housing 4 is shown.
  • the pump housing 4 has a suction opening 6 and an outlet opening 8.
  • the suction opening 6 and the outlet opening 8 are fluidly connected to one another by a flow space 10, in which the impeller 12 is arranged.
  • water flows through the suction opening 6 into the flow space 10, where it is accelerated by the rotating impeller 12 and pushed out of the centrifugal pump 2 via the outlet opening 8.
  • an expansion body 14 which is separated in the embodiment of the impeller 12 by the volute casing 16.
  • the spiral housing 16 has a wall 18, through which the expansion body 14 is held in its installed position. At the same time, the wall 18 limits the flow space 10 and the impeller 12.
  • the spiral housing 16 has a projection 20 which is clamped on the inner surface of the pump housing 4 and thereby centers the volute 16 in its installation position.
  • the projection 20 is configured in the embodiment as a circumferential ring.
  • an intake manifold 22 is formed in the embodiment, which connects the suction port 6 with the flow space 10 as a flow channel. Inserted into the intake manifold 22 is an inflow funnel 24, whose flow cross-section decreases in the direction of flow. The inflow funnel 24 abuts against the inner surface of the pump housing 4 via contact surfaces 26.
  • the volute 16 is designed as a one-piece molded body.
  • the dimensions of the spiral housing 16 are selected so that the spiral housing 16 is positioned without play in the flow chamber 10 when the pump housing 4 is mounted on the motor housing 28.
  • the volute casing is held by its dimensional adjustment to the internal dimensions of the pump housing 4 in its installed position.
  • the position fixation of the spiral housing 16 results in the embodiment, in particular from the spiral housing 16 formed on top surfaces 30th
  • a passage 32 surrounding the intake manifold 22 is formed in the exemplary embodiment, which circulates around the intake manifold 22.
  • the passage gap 32 forms a flow opening through which water from the flow space 10 can penetrate into the installation space in which the expansion body 14 is located when water in the flow space 10 expands in volume by a phase change. Due to its flexible design, the expansion body 14 is compressed by the penetrating water and partially displaced. When the water that has turned to ice thaws again and the volume of the water located in the flow space 10 decreases again, the water located in the region of the expansion body 14 can again flow back into the flow space 10 through the passage gap 32. In this way, the centrifugal pump 2 is preserved from possible frost damage.
  • Fig. 2 is a front view of the open pump housing 4 is shown.
  • the spiral housing 16 is inserted.
  • the wall 18 of the volute casing 16 forms an annular passage gap 32 in the abutting region on the intake manifold 22 by the corresponding dimensional design.
  • the impeller-side end face of the inflow funnel 24 can be seen, through which the free flow cross-section of the intake manifold 22 is reduced.
  • a pressure port 34 is formed, via which the water from the flow space 10 to the outlet port 8 is conveyed.
  • Fig. 3 is an exploded view of the individual components used in the pump housing 4 can be seen.
  • the expansion body 14 and the spiral housing 16 can be inserted into the pump housing 4.
  • the suction opening 6 of the inflow funnel 24 is shown, which is insertable into the intake manifold 22.
  • the components shown in Fig. 3 for the volute casing 16 and the inflow funnel 24 can be used in the pump housing 4, other shaped components that are adapted to a different shape of an impeller 12. Due to the possibility of being able to use differently shaped components in the pump housing 4 as spiral housing 16 and / or an inflow funnel 24, the pump housing 4 can be easily adapted to different wheels 12 and their particular performance characteristics.

Landscapes

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

Description

Die vorliegende Erfindung bezieht sich auf eine Kreiselpumpe mit einem Pumpengehäuse, das eine Ansaugöffnung und eine Auslassöffnung aufweist, die durch einen im Pumpengehäuse angeordneten Durchflussraum miteinander verbunden sind, einem im Durchflussraum angeordneten rotierend antreibbaren Laufrad, einem den Außenumfang des Laufrades umgebenden Spiralgehäuse und einem mit dem Durchflussraum in fluidischer Verbindung stehenden Ausdehnungskörper.The present invention relates to a centrifugal pump having a pump housing having a suction port and an outlet port, which are interconnected by a arranged in the pump housing flow space, a arranged in the flow space rotationally driven impeller, a surrounding the outer periphery of the impeller spiral casing and one with the Flow space in fluidly connected expansion body.

Eine Kreiselpumpe ist aus der Schrift WO 2004/020835 bekannt. Aus der Schrift DE 103 31 602 A1 ist es bekannt, eine Kreiselpumpe mit einem oder mehreren Ausdehnungskörpern zu versehen, um die Welle des Laufrades vor Frostschäden zu schützen. Wenn sich das Volumen des im Durchflussraum befindlichen Wassers aufgrund des temperaturbedingten Wechsels des Aggregatzustands verändert, kann der Ausdehnungskörper flexibel seine Form verändern. Insbesondere können auf das Pumpengehäuse oder Pumpenteile einwirkende Biegekräfte und Drücke beim Einfrieren von Wasser vermieden werden, wenn der Ausdehnungskörper durch einen steigenden Druck im Pumpengehäuse zusammengedrückt wird und auf diese Weise die Volumenzunahme des Wassers im Pumpengehäuse kompensiert werden kann. Zur Herstellung des Ausdehnungskörpers können flexible und elastische Materialien verwendet werden, wie beispielsweise Gummiblasen, geschlossenporige Schwämme aus einem flexiblen Material und dergleichen.A centrifugal pump is from the script WO 2004/020835 known. From the Scriptures DE 103 31 602 A1 It is known to provide a centrifugal pump with one or more expansion bodies to protect the shaft of the impeller from frost damage. If the volume of the water in the flow space changes due to the temperature-induced change of the state of matter, the expansion body can flexibly change its shape. In particular, acting on the pump housing or pump parts bending forces and pressures when freezing water can be avoided when the expansion body is compressed by an increasing pressure in the pump housing and in this way the volume increase of the water in the pump housing can be compensated. Flexible and elastic materials such as rubber bladders, closed-cell sponges of flexible material, and the like may be used to make the expansion body.

Eine Kreiselpumpe ist eine Strömungsmaschine, die mittels eines rotierenden Laufrads die Zentrifugalkraft zur Förderung von Flüssigkeiten nutzt. Flüssigkeit, die über den Ansaugstutzen in die Kreiselpumpe eintritt, wird vom rotierenden Laufrad mitgerissen und zunächst auf einer Kreisbahn nach außen gezwungen. Dadurch setzt sich die im Laufrad befindliche und vom Laufrad mitgenommene Flüssigkeit in Bewegung und neue Flüssigkeit wird in den Wirkbereich des Laufrades angesogen. Wird der Durchfluss des Wassers durch die Kreiselpumpe durch Einbauteile gestört, verschlechtert sich der Wirkungsgrad der Kreiselpumpe.A centrifugal pump is a turbomachine that uses centrifugal force to convey liquids by means of a rotating impeller. Liquid that enters the centrifugal pump via the intake manifold is entrained by the rotating impeller and forced outwards on a circular path. As a result, the liquid in the impeller and entrained by the impeller starts moving and new liquid is sucked into the effective range of the impeller. If the flow of water through the centrifugal pump is disturbed by built-in components, the efficiency of the centrifugal pump will deteriorate.

In der Praxis hat es sich als schwierig erwiesen, einen Ausdehnungskörper in das Pumpengehäuse zu integrieren, ohne dabei den Wirkungsgrad der Pumpe zu verschlechtern. Zwar ist es möglich, den Ausdehnungskörper im Motorgehäuse anzuordnen, dieses sollte aber möglichst dicht sein, um einen ungewollten Wassereintritt mit einem Totalschaden des Motors zu verhindern. Deshalb ist es vorteilhaft, das Wasser nach Möglichkeit ganz vom Motorgehäuse entfernt zu halten und den Ausdehnungskörper im Pumpengehäuse anzuordnen. Dort kann der Ausdehnungskörper jedoch den Wasserdurchfluss behindern, wenn er nicht optimal angeordnet ist. Auch sollte die Fertigung einer gattungsgemäßen Kreiselpumpe möglichst kostengünstig ohne einen erheblichen Aufwand möglich sein.In practice, it has proven difficult to integrate an expansion body in the pump housing, without deteriorating the efficiency of the pump. Although it is possible to arrange the expansion body in the motor housing, but this should be as tight as possible to prevent unwanted ingress of water with a total loss of the engine. Therefore, it is advantageous to keep the water as far as possible completely removed from the motor housing and to arrange the expansion body in the pump housing. There, however, the expansion body can hinder the water flow, if it is not optimally arranged. Also, the production of a generic centrifugal pump should be possible as inexpensively as possible without a considerable effort.

Demgemäß ist es die Aufgabe der vorliegenden Erfindung, eine Lösung vorzuschlagen, auf welche kostengünstige und montagefreundliche Weise der Wirkungsgrad des Laufrades erhöht werden kann, ohne dabei die Einbaumöglichkeit eines Ausdehnungskörpers im Pumpengehäuse zu beeinträchtigen.Accordingly, it is the object of the present invention to propose a solution to which cost and installation-friendly manner, the efficiency of the impeller can be increased without affecting the installation option of an expansion body in the pump housing.

Die Aufgabe wird für eine gattungsgemäße Kreiselpumpe gelöst, indem die Kreiselpumpe ein den Außenumfang des Laufrades umgebendes Spiralgehäuse aufweist und das Spiralgehäuse als ein vom Pumpengehäuse separates ein- oder mehrteilig ausgestaltetes Formteil ausgebildet ist.The object is achieved for a generic centrifugal pump by the centrifugal pump has a surrounding the outer periphery of the impeller spiral housing and the spiral housing is formed as a separate from the pump housing one or more parts ausgestaltetes molding.

Eine in Umfangsrichtung zum Laufrad spiralförmig verlaufende Wandung kann den Wirkungsgrad des in der Pumpe eingesetzten Laufrades verbessern. Insbesondere wenn der freie Querschnitt des Strömungskanals zwischen dem Außenumfang des Laufrades und der nach innen weisenden Fläche des Spiralgehäuses in Förderrichtung des gepumpten Wassers auf die Auslassöffnung zu zunimmt, können mit der Kreiselpumpe verbesserte Wirkungsgrade erzielt werden.A spiral running in the circumferential direction of the impeller wall can improve the efficiency of the impeller used in the pump. In particular, if the free cross-section of the flow channel between the outer periphery of the impeller and the inwardly facing surface of the spiral housing in the conveying direction of the pumped water to the outlet opening increases, improved efficiencies can be achieved with the centrifugal pump.

Durch die Verwendung eines vom Pumpengehäuse separaten Formteils kann dieses in seiner Form freier gestaltet werden. Dies ist insbesondere im Hinblick auf eine optimale Abstimmung auf die Form des Laufrades von Vorteil. Es ist einfacher, beispielsweise ein Spritzgussteil aus Kunststoff in seiner Form von Anfang an optimiert zu gestalten, als in einer laufenden Serienfertigung ein Pumpengehäuse jeweils nachträglich so nachzubearbeiten, dass sich eine zum Laufrad optimierte Formgestaltung einstellt. Das separate Formteil kann so gestaltet werden, dass der Ausdehnungskörper in das Pumpengehäuse einbaubar ist, ohne in der Einbaulage den Durchfluss des Wassers durch die Laufräder zu beeinträchtigen. Zudem ist es möglich, in ein einheitliches Pumpengehäuse unterschiedliche Laufräder mit jeweils daran angepassten Spiraleinsätzen einzusetzen, ohne dafür verschiedene Pumpengehäuse vorhalten zu müssen. Die Bevorratung und Teilevielfalt in einer Produktion kann dadurch verringert werden. Es ist möglich, mit nur einem einzigen Pumpengehäuse verschiedene Kreiselpumpen mit verschiedenen Kennlinien herzustellen und anzubieten, die sich nur durch die Form des Spiraleinsatzes, des Laufrades und eventuell zusätzlich der Motorauslegung voneinander unterscheiden.By using a separate from the pump housing molding this can be designed freely in shape. This is particularly advantageous in terms of an optimal match to the shape of the impeller. It's easier, for example to design an injection molded plastic part in its shape from the beginning optimized, as in a running mass production, a pump housing subsequently each nachzubearbeiten so that adjusts an optimized design for the impeller design. The separate molded part can be designed so that the expansion body can be installed in the pump housing, without affecting the flow of water through the wheels in the installed position. In addition, it is possible to use different impellers, each adapted thereto spiral inserts in a single pump housing, without having to hold for different pump housing. The stocking and variety of parts in a production can be reduced thereby. It is possible to produce and offer different centrifugal pumps with different characteristics with only a single pump housing, which differ only by the shape of the spiral insert, the impeller and possibly also the motor design from each other.

Für die Verbesserung des Wirkungsgrades der Kreiselpumpe ist es ohne Belang, ob das Spiralgehäuse als ein ein- oder mehrteiliges Formteil ausgestaltet ist. Ein mehrteiliges Formteil kann leicht zusammensteckbar ausgestaltet sein, so dass sich kein erheblich erhöhter Montageaufwand einstellt. Am einfachsten ist die Montage jedoch, wenn das Formteil einteilig ausgestaltet ist.For the improvement of the efficiency of the centrifugal pump, it does not matter whether the volute is designed as a one- or multi-part molded part. A multipart molding can be configured easily plugged together, so that sets no significantly increased installation costs. The easiest way to assemble, however, is when the molding is designed in one piece.

Nach einer Ausgestaltung der Erfindung ist das Spiralgehäuse in seiner Einbaulage im Pumpengehäuse mit dem Pumpengehäuse kraft- und/oder formschlüssig verbunden. Bei einer kraftschlüssigen Verbindung - beispielsweise klemmend - ist die Montage werkzeuglos möglich und entsprechend einfach. Bei einer formschlüssigen Verbindung wird das Spiralgehäuse durch seine Form in seiner Einbaulage gehalten. Durch Vorsprünge im seitlichen Umfang kann das Spiralgehäuse daran gehindert werden, seine Einbaulage in Rotationsrichtung des Laufrades über die Gebrauchsdauer der Kreiselpumpe zu verändern. Höhenbewegungen entlang der Rotationsachse des Laufrades können vermieden werden, wenn die Bauhöhe des Spiralgehäuses genau an die Maße des Durchflussraums angepasst ist und sich das Spiralgehäuse in der Einbaulage an der Innenwandung des Pumpengehäuses abstützt. Auch bei dieser Verbindung ist die Montage werkzeuglos und damit entsprechend schnell und effizient möglich, indem das Spiralgehäuse bei der Montage der Kreiselpumpe nur in das Pumpengehäuse eingelegt wird, bevor dieses mit dem Motorgehäuse verbunden wird. Die kraft- und formschlüssige Verbindungstechnik kann auch miteinander kombiniert werden, um ein Spiralgehäuse in einem Pumpengehäuse in der Einbaulage zu fixieren. Die vorgeschlagenen Verbindungstechniken sind im Reparaturfall auch leicht wieder lösbar.According to one embodiment of the invention, the spiral housing in its installed position in the pump housing with the pump housing non-positively and / or positively connected. In a non-positive connection - for example, clamping - the installation is possible without tools and correspondingly simple. In a positive connection, the spiral housing is held by its shape in its installed position. By protrusions in the lateral periphery, the spiral housing can be prevented from changing its mounting position in the direction of rotation of the impeller over the service life of the centrifugal pump. Height movements along the axis of rotation of the impeller can be avoided if the overall height of the volute is exactly adapted to the dimensions of the flow space and the volute is supported in the installation position on the inner wall of the pump housing. Even with this connection, the assembly is tool-free and thus accordingly Quick and efficient possible by the spiral housing is placed during assembly of the centrifugal pump only in the pump housing, before it is connected to the motor housing. The non-positive and positive connection technology can also be combined with each other to fix a spiral housing in a pump housing in the installed position. The proposed connection techniques are also easily removable in case of repair.

Nach einer Ausgestaltung der Erfindung ist der Ausdehnungskörper in einem an den Durchflussraum angrenzenden Raum im Pumpengehäuse angeordnet und der Ausdehnungskörper vom Durchflussraum durch eine Wandung des Spiralgehäuses abgeteilt. Durch die Anordnung des Ausdehnungskörpers außerhalb des Durchflussraums ist ein ungehinderter Wasserdurchfluss durch den Durchflussraum sichergestellt. Der Durchflussraum kann strömungstechnisch optimal gestaltet werden, ohne auf den Ausdehnungskörper Rücksicht nehmen zu müssen. Da das Spiralgehäuse den Durchflussraum umgrenzt, kann auf eine zusätzliche Wandung verzichtet werden, wenn eine Wandung des Spiralgehäuses gleichzeitig die Begrenzung zum Bauraum für den Ausdehnungskörper ausbildet.According to one embodiment of the invention, the expansion body is arranged in a space adjacent to the flow space in the pump housing and the expansion body separated from the flow space by a wall of the spiral housing. The arrangement of the expansion body outside the flow space an unhindered water flow through the flow space is ensured. The flow space can be optimally designed fluidically, without having to take account of the expansion body. Since the volute surrounds the flow space, can be dispensed with an additional wall when a wall of the volute at the same time forms the boundary to the space for the expansion body.

Nach einer Ausgestaltung der Erfindung ist der Ausdehnungskörper von der Wandung in seiner Einbaulage gehalten. Durch diese Gestaltung wird die Montage der Pumpe vereinfacht. Um die Kreiselpumpe zu montieren, braucht der Ausdehnungskörper nur in das Pumpengehäuse eingelegt zu werden, um sodann das Sprialgehäuse darauf zu legen und das Pumpengehäuse mit dem Motorgehäuse zu verbinden.According to one embodiment of the invention, the expansion body is held by the wall in its installed position. This design simplifies the installation of the pump. To mount the centrifugal pump, the expansion body need only be inserted into the pump housing to then place the sprial housing thereon and connect the pump housing to the motor housing.

Nach einer Ausgestaltung der Erfindung begrenzt das ein- oder mehrteilig ausgestaltete Formteil des Spiralgehäuses in seiner Einbaulage Durchströmungsöffnungen, die den Ausdehnungskörper mit dem Durchflussraum fluidisch verbinden. Die Durchströmungsöffnungen können ausschließlich in einer Wandung des Formteils ausgebildet sein, beispielsweise als Löcher oder Schlitze, wodurch jedoch Störungen im Strömungsverhalten des Wassers durch den Durchflussraum verursacht werden können. Es ist jedoch auch möglich, die Durchströmungsöffnungen durch Spalte auszubilden, die das Spiralgehäuse gemeinsam mit einer Wandung des Pumpengehäuses ausbildet. Da das Spiralgehäuse aufgrund unvermeidbarer Toleranzen nicht dichtend an die Innenoberflächen des Pumpengehäuses angelegt werden kann, wird bei dieser Ausgestaltung das Spaltmaß zwischen einem Bauteilrand des Spiralgehäuses und der angrenzenden Oberfläche des Pumpengehäuses so verbreitert, dass sich unter Einrechnung der möglichen Toleranzen immer eine ausreichend dimensionierte Durchströmungsöffnung ergibt, durch die ein Druckausgleich zwischen dem Durchströmungsraum und dem Ausdehnungskörper möglich ist, um Beschädigungen an Bauteilen der Pumpe durch gefrierendes Wasser zu vermeiden. Eine besonders strömungsgünstige Lage eines Durchlassspaltes befindet sich im Anstoßbereich des Spiralgehäuses an den Ansaugstutzen oder die Ansaugöffnung, da dort die Strömungsverhältnisse des Wassers nur geringfügig beeinträchtigt werden.According to one embodiment of the invention, the single-part or multi-part molded part of the spiral housing in its installed position limits flow openings which fluidly connect the expansion body to the flow space. The through-flow openings can be formed exclusively in a wall of the molded part, for example as holes or slits, whereby, however, disturbances in the flow behavior of the water through the flow space can be caused. However, it is also possible, the flow openings through column form, which forms the spiral housing together with a wall of the pump housing. Since the spiral housing can not be applied sealingly against the inner surfaces of the pump housing due to unavoidable tolerances, the gap between a component edge of the spiral housing and the adjacent surface of the pump housing is widened in this embodiment so that, taking into account the possible tolerances always results in a sufficiently sized flow opening , by which a pressure equalization between the flow space and the expansion body is possible to avoid damage to components of the pump by freezing water. A particularly flow-favorable position of a passage gap is located in the abutting region of the volute casing on the intake manifold or the intake, since there the flow conditions of the water are only slightly impaired.

Nach einer Ausgestaltung der Erfindung weist das Spiralgehäuse auf seiner dem Laufrad abgewandten Außenseite einen oder mehrere Vorsprünge auf, mit denen sich das Spiralgehäuse in seiner Einbaulage am Pumpengehäuse selbstausrichtend abstützt. Das Spiralgehäuse muss im Pumpengehäuse so eingebaut sein, dass das Laufrad bei einer Rotationsbewegung nicht mit den Oberflächen des Spiralgehäuses kollidiert oder darauf schleift. Es müssen auch die vorgesehenen Maße des vom Außenumfang des Laufrades und der Innenoberfläche des Spiralgehäuses begrenzten freien Querschnitts des Strömungskanals eingehalten werden, um einen optimalen Wirkungsgrad der Pumpe zu erzielen. Dementsprechend ist eine auf die Drehachse des Laufrades ausgerichtete Zentrierung des Spiralgehäuses in seiner Einbaulage erforderlich. Diese Zentrierung kann über Vorsprünge bewirkt werden, die auf gegenüberliegenden Seiten des Spiralgehäuses im Verhältnis zur Drehachse des Laufrades angeordnet sind. Wenn sich die Vorsprünge in ihrer Einbaulage am Pumpengehäuse abstützen, insbesondere mit einer Kraftkomponente quer zur Drehachse des Laufrades, stellen die Vorsprünge über die Abstützkräfte ein Kräftegleichgewicht ein, bei dem das Spiralgehäuse in seiner Solleinbauposition in einer zur Drehachse des Laufrades passend zentrierten Lage gehalten ist.According to one embodiment of the invention, the spiral housing on its side facing away from the impeller has one or more projections, with which the volute casing is self-aligning in its installed position on the pump housing. The volute must be installed in the pump housing so that the impeller does not collide with or rub against the surfaces of the volute when rotating. It must also comply with the intended dimensions of the limited by the outer circumference of the impeller and the inner surface of the volute casing free cross section of the flow channel in order to achieve optimum efficiency of the pump. Accordingly, an aligned on the axis of rotation of the impeller centering of the spiral housing in its installed position is required. This centering can be effected by means of projections which are arranged on opposite sides of the spiral housing in relation to the axis of rotation of the impeller. When the projections are supported in their installed position on the pump housing, in particular with a force component transverse to the axis of rotation of the impeller, the projections on the support forces a balance of power, in which the spiral housing is held in its Solleinbauposition in a suitably centered to the axis of rotation of the impeller.

Nach einer Ausgestaltung der Erfindung ist die Ansaugöffnung mit dem Durchflussraum über einen Ansaugstutzen verbunden und der Ausdehnungskörper ist als ringförmiges Bauteil ausgestaltet, das den Ansaugstutzen an dessen Außenumfang umfasst. Durch den Ansaugstutzen kann der für den Ausdehnungskörper benötigte Bauraum überbrückt werden. Der Ansaugstutzen überbrückt einen Förderweg für das einströmende Wasser von der Ansaugöffnung bis zum Laufrad. Der Ansaugstutzen ist ein in das Pumpengehäuse integrierter Bestandteil oder ein separates Bauteil, das in das Pumpengehäuse eingesetzt wird. Der Ansaugstutzen kann mit seiner Baulänge dazu genutzt werden, das Einströmungsverhalten des Wassers in die Kreiselpumpe zu verbessern. Durch die Strecke, die das von der Pumpe angesaugte Wasser durch den Ansaugstutzen hindurchströmt, wird die Strömung in diesem Bereich gleichgerichtet. Turbulente Strömungen, die den möglichst ungestörten Durchfluss des Wassers stören könnten, werden so verringert oder gänzlich vermieden. Durch die Anströmung des Laufrades aus dem Ansaugstutzen und nicht direkt aus der Ansaugöffnung strömt das Wasser gleichmäßiger in das Laufrad ein, wodurch sich die Wirkungsgradverluste verringern. Durch die ringförmige Ausbildung des Ausdehnungskörpers kann der Ansaugstutzen mittig durch den Ausdehnungskörper hindurchgeführt und ebenso mittig auf das Laufrad gerichtet werden. Der Ausdehnungskörper kann in seiner Form und Lage voll an die Form und Lage des Laufrades angepasst werden, so dass sich eine Kompensationsmöglichkeit für phasenwechselbedingte Druckunterschiede unabhängig vom Ort und dem Fortschreiten des Gefrierens des im Pumpengehäuse befindlichen Wassers ergibt.According to one embodiment of the invention, the suction opening is connected to the flow space via an intake and the expansion body is designed as an annular member which includes the intake manifold on the outer periphery. Through the intake manifold, the space required for the expansion body can be bridged. The intake manifold bridges a conveying path for the inflowing water from the intake opening to the impeller. The intake manifold is an integral part of the pump housing or a separate component that is inserted into the pump housing. The intake manifold can be used with its length to improve the Einströmungsverhalten of the water in the centrifugal pump. By the distance that flows through the sucked by the pump water through the intake, the flow is rectified in this area. Turbulent currents, which could disturb the undisturbed flow of the water, are thus reduced or completely avoided. Due to the flow of the impeller from the intake and not directly from the intake, the water flows more uniformly in the impeller, thereby reducing the efficiency losses. Due to the annular design of the expansion body, the intake manifold can be centrally guided through the expansion body and also centered on the impeller. The expansion body can be fully adapted in its shape and position to the shape and position of the impeller, so that a compensation option for phase change pressure differences regardless of the location and the progress of the freezing of the water located in the pump housing results.

Nach einer Ausgestaltung der Erfindung ist in einen Ansaugstutzen ein Einströmtrichter als ein- oder mehrteilig ausgestaltetes Formteil eingesetzt, das in seiner Einbaulage im Ansaugstutzen mit dem Pumpengehäuse kraft- und/oder formschlüssig verbunden ist. Durch einen separaten Einströmtrichter kann das Strömungsverhalten des Wassers im Bereich des Ansaugstutzens noch weiter verbessert und an die Strömungscharakteristik des jeweiligen Laufrades angepasst werden. Durch die Trichterform ist es insbesondere möglich, das Einströmungsverhalten des Wassers in die Ansaugöffnung hinein zu verbessern und Strömungswirbel, die sich im Umkreis vor oder im Bereich der Ansaugöffnung ergeben, zu verkleinern oder ganz zu vermeiden. Durch die kraft- und/oder formschlüssige Verbindung kann das Formteil leicht montiert werden. Je nach verwendetem Laufrad ist es auch möglich, in einem identischen Pumpengehäuse eines von mehreren unterschiedlichen Laufrädern und einen von mehreren dazu passenden unterschiedlichen Einströmtrichtern zu verwenden, so dass sich eine Art Baukasten für die Konfiguration einer Kreiselpumpe aus unterschiedlichen Komponenten ergibt.According to one embodiment of the invention, an inflow funnel is used as a one-piece or multi-part ausgestaltetes molding in an intake, which is positively and / or positively connected in its installed position in the intake manifold with the pump housing. By a separate inflow funnel, the flow behavior of the water in the region of the intake can be further improved and adapted to the flow characteristics of the respective impeller. Due to the funnel shape, it is in particular possible to improve the inflow behavior of the water into the intake opening and to reduce flow vortexes, which result in the vicinity in front of or in the region of the intake opening, or completely avoid. Due to the non-positive and / or positive connection, the molded part can be easily mounted. Depending on the impeller used, it is also possible to use in an identical pump housing one of several different impellers and one of several matching different inflow funnels, thus resulting in a kind of kit for the configuration of a centrifugal pump of different components.

Nach einer Ausgestaltung der Erfindung weist der Einströmtrichter auf seiner Auβenumfangsfläche Kontaktflächen auf, über die der Einströmtrichter in seiner Einbaulage am Pumpengehäuse selbstausrichtend abgestützt ist. Für die selbstausrichtende Abstützung des Einströmtrichters ergeben sich die entsprechenden Vorteile, wie sie vorstehend bereits für die selbstausrichtende Abstützung des Spiralgehäuses erläutert sind.According to one embodiment of the invention, the inflow funnel on its Auβenumfangsfläche contact surfaces over which the inflow funnel is supported self-aligning in its installed position on the pump housing. For the self-aligning support of the inflow funnel there are the corresponding advantages, as already explained above for the self-aligning support of the spiral housing.

Es wird ausdrücklich darauf hingewiesen, dass die vorstehend beschriebenen Ausgestaltungen der Erfindung jeweils für sich, aber auch untereinander mit der Ausgestaltung gemäß der im Hauptanspruch beschriebenen Erfindung kombinierbar sind. Das gilt auch für die Kombination einzelner technischer Merkmale, die für eine Ausgestaltung beschrieben sind, mit einzelnen technischen Merkmalen einer anderen Ausgestaltung, soweit eine solche Kombination technisch sinnvoll ist.It is expressly understood that the embodiments of the invention described above in each case, but also with each other with the embodiment according to the invention described in the main claim are combined. This also applies to the combination of individual technical features, which are described for a design, with individual technical features of another embodiment, as far as such a combination is technically meaningful.

Weitere Abwandlungen und Ausgestaltungen der Erfindung lassen sich der nachfolgenden gegenständlichen Beschreibung und den Zeichnungen entnehmen.Further modifications and embodiments of the invention can be taken from the following description and the drawings.

Die Erfindung soll nun anhand eines Ausführungsbeispiels näher erläutert werden. Es zeigen:

Fig. 1:
eine Querschnittsansicht durch eine Kreiselpumpe,
Fig. 2:
eine Ansicht auf das Pumpengehäuse und
Fig. 3:
eine Explosionszeichnung des Pumpengehäuses aus Figur 2.
The invention will now be explained in more detail with reference to an embodiment. Show it:
Fig. 1:
a cross-sectional view through a centrifugal pump,
Fig. 2:
a view of the pump housing and
3:
an exploded view of the pump housing of Figure 2.

In Fig. 1 ist eine Kreiselpumpe 2 mit einem Pumpengehäuse 4 gezeigt. Das Pumpengehäuse 4 verfügt über eine Ansaugöffnung 6 und eine Auslassöffnung 8. Die Ansaugöffnung 6 und die Auslassöffnung 8 sind durch einen Durchflussraum 10 strömungstechnisch miteinander verbunden, in dem das Laufrad 12 angeordnet ist. Beim Betrieb der Kreiselpumpe 2 strömt Wasser durch die Ansaugöffnung 6 in den Durchflussraum 10, wird dort durch das rotierende Laufrad 12 beschleunigt und über die Auslassöffnung 8 aus der Kreiselpumpe 2 herausgedrückt.In Fig. 1 a centrifugal pump 2 with a pump housing 4 is shown. The pump housing 4 has a suction opening 6 and an outlet opening 8. The suction opening 6 and the outlet opening 8 are fluidly connected to one another by a flow space 10, in which the impeller 12 is arranged. During operation of the centrifugal pump 2, water flows through the suction opening 6 into the flow space 10, where it is accelerated by the rotating impeller 12 and pushed out of the centrifugal pump 2 via the outlet opening 8.

Seitlich beabstandet zum Laufrad 12 befindet sich im Pumpengehäuse 4 ein Ausdehnungskörper 14, der im Ausführungsbeispiel vom Laufrad 12 durch das Spiralgehäuse 16 abgetrennt ist. Das Spiralgehäuse 16 verfügt über eine Wandung 18, durch die der Ausdehnungskörper 14 in seiner Einbaulage gehalten ist. Gleichzeitig begrenzt die Wandung 18 den Durchflussraum 10 und das Laufrad 12.Laterally spaced from the impeller 12 is located in the pump housing 4, an expansion body 14 which is separated in the embodiment of the impeller 12 by the volute casing 16. The spiral housing 16 has a wall 18, through which the expansion body 14 is held in its installed position. At the same time, the wall 18 limits the flow space 10 and the impeller 12.

Das Spiralgehäuse 16 weist einen Vorsprung 20 auf, der sich klemmend auf der Innenoberfläche des Pumpengehäuses 4 abstützt und dadurch das Spiralgehäuse 16 in seiner Einbaulage zentriert. Der Vorsprung 20 ist im Ausführungsbeispiel als ein umlaufender Ring ausgestaltet.The spiral housing 16 has a projection 20 which is clamped on the inner surface of the pump housing 4 and thereby centers the volute 16 in its installation position. The projection 20 is configured in the embodiment as a circumferential ring.

Im Pumpengehäuse 4 ist im Ausführungsbeispiel ein Ansaugstutzen 22 ausgebildet, der als Strömungskanal die Ansaugöffnung 6 mit dem Durchflussraum 10 verbindet. In den Ansaugstutzen 22 eingesetzt ist ein Einströmtrichter 24, dessen Strömungsquerschnitt sich in Durchströmungsrichtung verkleinert. Der Einströmtrichter 24 liegt über Kontaktflächen 26 an der Innenoberfläche des Pumpengehäuses 4 an.In the pump housing 4, an intake manifold 22 is formed in the embodiment, which connects the suction port 6 with the flow space 10 as a flow channel. Inserted into the intake manifold 22 is an inflow funnel 24, whose flow cross-section decreases in the direction of flow. The inflow funnel 24 abuts against the inner surface of the pump housing 4 via contact surfaces 26.

In der in Fig. 1 dargestellten Zusammenbausituation der Kreiselpumpe 2 ist das Spiralgehäuse 16 als einteiliger Formkörper ausgestaltet. Die Maße des Spiralgehäuses 16 sind so gewählt, dass das Spiralgehäuse 16 spielfrei im Durchflussraum 10 positioniert ist, wenn das Pumpengehäuse 4 auf das Motorgehäuse 28 befestigt ist. Das Spiralgehäuse ist dabei durch seine maßliche Abstimmung auf die Innenmaße des Pumpengehäuses 4 in seiner Einbaulage gehalten. Die Lagefixierung des Spiralgehäuses 16 ergibt sich im Ausführungsbeispiel insbesondere aus den am Spiralgehäuse 16 ausgebildeten Aufsatzflächen 30.In the in Fig. 1 illustrated assembly situation of the centrifugal pump 2, the volute 16 is designed as a one-piece molded body. The dimensions of the spiral housing 16 are selected so that the spiral housing 16 is positioned without play in the flow chamber 10 when the pump housing 4 is mounted on the motor housing 28. The volute casing is held by its dimensional adjustment to the internal dimensions of the pump housing 4 in its installed position. The position fixation of the spiral housing 16 results in the embodiment, in particular from the spiral housing 16 formed on top surfaces 30th

Im Anstoßbereich der Wandung 18 an den Ansaugstutzen 22 ist im Ausführungsbeispiel ein den Ansaugstutzen 22 umgebender Durchlassspalt 32 ausgebildet, der um den Ansaugstutzen 22 umläuft. Der Durchlassspalt 32 bildet eine Durchströmungsöffnung, durch die Wasser aus dem Durchflussraum 10 in den Einbauraum eindringen kann, in dem sich der Ausdehnungskörper 14 befindet, wenn sich Wasser im Durchflussraum 10 in seinem Volumen durch einen Phasenwechsel ausdehnt. Durch seine flexible Ausgestaltung wird der Ausdehnungskörper 14 vom eindringenden Wasser zusammengedrückt und teilweise verdrängt. Wenn das zu Eis gewordene Wasser wieder auftaut und sich das Volumen des im Durchflussraum 10 befindlichen Wassers wieder verringert, kann das im Bereich des Ausdehnungskörpers 14 befindliche Wasser wieder durch den Durchlassspalt 32 zurück in den Durchflussraum 10 strömen. Auf diese Weise wird die Kreiselpumpe 2 vor eventuellen Frostschäden bewahrt.In the abutting region of the wall 18 to the intake manifold 22, a passage 32 surrounding the intake manifold 22 is formed in the exemplary embodiment, which circulates around the intake manifold 22. The passage gap 32 forms a flow opening through which water from the flow space 10 can penetrate into the installation space in which the expansion body 14 is located when water in the flow space 10 expands in volume by a phase change. Due to its flexible design, the expansion body 14 is compressed by the penetrating water and partially displaced. When the water that has turned to ice thaws again and the volume of the water located in the flow space 10 decreases again, the water located in the region of the expansion body 14 can again flow back into the flow space 10 through the passage gap 32. In this way, the centrifugal pump 2 is preserved from possible frost damage.

In Fig. 2 ist eine Frontalansicht auf das offene Pumpengehäuse 4 gezeigt. In das Pumpengehäuse 4 ist das Spiralgehäuse 16 eingesetzt. In der Frontalansicht ist gut erkennbar, dass die Wandung 18 des Spiralgehäuses 16 im Anstoßbereich an den Ansaugstutzen 22 durch die entsprechende maßliche Ausgestaltung einen ringförmigen Durchlassspalt 32 ausbildet. Auch ist die laufradseitige Stirnseite des Einströmtrichters 24 erkennbar, durch den der freie Strömungsquerschnitt des Ansaugstutzens 22 verringert wird. An das Pumpengehäuse 4 ist ein Druckstutzen 34 angeformt, über den das Wasser vom Durchflussraum 10 zur Auslassöffnung 8 befördert wird.In Fig. 2 is a front view of the open pump housing 4 is shown. In the pump housing 4, the spiral housing 16 is inserted. In the front view, it can be clearly seen that the wall 18 of the volute casing 16 forms an annular passage gap 32 in the abutting region on the intake manifold 22 by the corresponding dimensional design. Also, the impeller-side end face of the inflow funnel 24 can be seen, through which the free flow cross-section of the intake manifold 22 is reduced. To the pump housing 4, a pressure port 34 is formed, via which the water from the flow space 10 to the outlet port 8 is conveyed.

In Fig. 3 ist eine Explosionsansicht der einzelnen in das Pumpengehäuse 4 eingesetzten Bauteile zu sehen. Auf der Seite des Durchflussraums 10 sind in das Pumpengehäuse 4 der Ausdehnungskörper 14 und das Spiralgehäuse 16 einsetzbar. Auf der Seite der Ansaugöffnung 6 ist der Einströmtrichter 24 gezeigt, der in den Ansaugstutzen 22 einsetzbar ist. Anstelle der in Fig. 3 gezeigten Bauteile für das Spiralgehäuse 16 und den Einströmtrichter 24 können in das Pumpengehäuse 4 auch anders geformte Bauteile eingesetzt werden, die auf eine andere Form eines Laufrades 12 angepasst sind. Durch die Möglichkeit, in das Pumpengehäuse 4 verschieden geformte Bauteile als Spiralgehäuse 16 und/oder einen Einströmtrichter 24 einsetzen zu können, kann das Pumpengehäuse 4 leicht an unterschiedliche Laufräder 12 und deren besondere Leistungscharakteristik angepasst werden.In Fig. 3 is an exploded view of the individual components used in the pump housing 4 can be seen. On the side of the flow space 10, the expansion body 14 and the spiral housing 16 can be inserted into the pump housing 4. On the side of the suction opening 6 of the inflow funnel 24 is shown, which is insertable into the intake manifold 22. Instead of the components shown in Fig. 3 for the volute casing 16 and the inflow funnel 24 can be used in the pump housing 4, other shaped components that are adapted to a different shape of an impeller 12. Due to the possibility of being able to use differently shaped components in the pump housing 4 as spiral housing 16 and / or an inflow funnel 24, the pump housing 4 can be easily adapted to different wheels 12 and their particular performance characteristics.

Die Erfindung ist nicht auf das vorstehend beschriebene Ausführungsbeispiel beschränkt. Dem Fachmann bereitet es keine Schwierigkeiten, das Ausführungsbeispiel auf eine ihm als geeignet erscheinende Weise an die technischen Bedürfnisse eines konkreten Anwendungsfalles anzupassen. Die vorstehende Beschreibung dient nur zu Beschreibungszwecken der vorliegenden Erfindung.The invention is not limited to the embodiment described above. It is not difficult for the person skilled in the art to adapt the exemplary embodiment to the technical requirements of a specific application case in a manner that seems suitable to him. The foregoing description is for the purpose of describing the present invention only.

Claims (9)

  1. Centrifugal pump (2) comprising a pump housing (4) having an intake opening (6) and an outlet opening (8) which are interconnected by a flow chamber (10) arranged in the pump housing (4), a rotatably driven impeller (12) arranged in the flow chamber (10), and an expansion body (14) that is fluidically connected to the flow chamber (10), characterised in that the centrifugal pump (2) has a spiral housing (16) surrounding the outer circumference of the impeller (12) and the spiral housing (16) is formed as a single-piece or multi-piece moulded part which is separate from the pump housing (4).
  2. Centrifugal pump (2) according to claim 1, characterised in that the spiral housing (16), in the installation position thereof in the pump housing (4), is frictionally and/or form-fittingly connected to the pump housing (4).
  3. Centrifugal pump (2) according to either claim 1 or claim 2, characterised in that the expansion body (14) is arranged in the pump housing (4) in a chamber which is adjacent to the flow chamber (10), and the expansion body (14) is separated from the flow chamber (10) by a wall (18) of the spiral housing (16).
  4. Centrifugal pump (2) according to any of the preceding claims, characterised in that the expansion body (14) is held in the installation positon thereof by the wall (18).
  5. Centrifugal pump (2) according to any of the preceding claims, characterised in that the single-piece or multi-piece moulded part of the spiral housing (16), in the installation position thereof, delimits through-flow openings which fluidically connect the expansion body (14) to the flow chamber (10).
  6. Centrifugal pump (2) according to any of the preceding claims, characterised in that the spiral housing (16) has one or more projections (20) on the outer side thereof which is remote from the impeller (12), by means of which projections the spiral housing (16), in the installation position thereof, is supported on the pump housing (4) in a self-aligning manner.
  7. Centrifugal pump (2) according to any of the preceding claims, characterised in that the intake opening (6) is connected to the flow chamber (10) via an intake connector (22), and the expansion body (14) is designed as an annular component which surrounds the outer circumference of the intake connector (22).
  8. Centrifugal pump (2) according to any of claims 1 to 7, characterised in that an inflow funnel (24) is inserted into an intake connector (22) as a single-piece or multi-piece moulded part, which funnel, in the installation position thereof in the intake connector, is frictionally and/or form-fittingly connected to the pump housing (4).
  9. Centrifugal pump (2) according to claim 8, characterised in that the inflow funnel (24) has contact surfaces (26) on the outer circumferential surface thereof, by means of which contact surfaces the inflow funnel (24), in the installation position thereof, is supported on the pump housing (4) in a self-aligning manner.
EP11005738.7A 2011-07-13 2011-07-13 Circulation pump with spiral housing Active EP2546525B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP11005738.7A EP2546525B1 (en) 2011-07-13 2011-07-13 Circulation pump with spiral housing
US13/543,842 US9222476B2 (en) 2011-07-13 2012-07-08 Rotary pump with spiral casing
CN201210467996.8A CN102954040B (en) 2011-07-13 2012-07-13 There is the sickle pump of propeller cap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11005738.7A EP2546525B1 (en) 2011-07-13 2011-07-13 Circulation pump with spiral housing

Publications (2)

Publication Number Publication Date
EP2546525A1 EP2546525A1 (en) 2013-01-16
EP2546525B1 true EP2546525B1 (en) 2017-03-29

Family

ID=44581929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11005738.7A Active EP2546525B1 (en) 2011-07-13 2011-07-13 Circulation pump with spiral housing

Country Status (3)

Country Link
US (1) US9222476B2 (en)
EP (1) EP2546525B1 (en)
CN (1) CN102954040B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104235070A (en) * 2013-06-13 2014-12-24 德昌电机(深圳)有限公司 Pump case and pump with same
US10890179B2 (en) * 2015-12-24 2021-01-12 Fluid-O-Tech Group S.R.L. Container assembly for a pump
DE102018217179B4 (en) * 2018-10-08 2023-06-29 Vitesco Technologies GmbH Fluid pump, water delivery unit, water injection system, internal combustion engine and vehicle
DE102018217176B4 (en) * 2018-10-08 2020-06-10 Continental Automotive Gmbh Fluid pump, water delivery unit, water injection system, internal combustion engine and vehicle
JP2021036134A (en) * 2019-08-30 2021-03-04 日本電産サンキョー株式会社 Pump device

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776664A (en) * 1972-08-18 1973-12-04 A Kimmel Small diameter irrigation pump
JPS5918297A (en) * 1982-07-20 1984-01-30 Mitsubishi Electric Corp Scroll pump
DE4005640A1 (en) * 1990-02-22 1991-08-29 Klein Schanzlin & Becker Ag SPIRAL CASE IN SHEET DESIGN
JPH11294366A (en) * 1998-04-16 1999-10-26 Nikkiso Co Ltd Cryogenic pump with antifreezing mechanism
US6056506A (en) * 1998-09-23 2000-05-02 Emerson Electric Co. Pump assembly for jetted tub
JP2002155883A (en) * 2000-11-22 2002-05-31 Ebara Corp Magnetic pump and motor
KR100438083B1 (en) * 2002-02-23 2004-07-03 이상영 Pump by using a disuse tire
CA2497056A1 (en) * 2002-08-31 2004-03-11 Oase Gmbh Submersible motor-driven pump with an anti-freeze device
DE10331602B4 (en) 2002-08-31 2005-08-25 Oase Gmbh Submersible pump with frost protection device
US8419358B2 (en) * 2009-06-17 2013-04-16 Sundyne, Llc Flow output nozzle for centrifugal pump
CN101846102B (en) * 2010-06-03 2012-07-25 浙江利欧股份有限公司 Frost crack prevention water pump
CN102192157B (en) * 2011-05-16 2013-04-10 广州市白云泵业集团有限公司 Vertical internal and external mixing shaft-seal-free self-sucking pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20130017077A1 (en) 2013-01-17
CN102954040A (en) 2013-03-06
US9222476B2 (en) 2015-12-29
EP2546525A1 (en) 2013-01-16
CN102954040B (en) 2017-03-01

Similar Documents

Publication Publication Date Title
EP2546525B1 (en) Circulation pump with spiral housing
EP3008346B1 (en) Pump
EP1760322B1 (en) Pond or aquarium pump
EP2905472B1 (en) Wet running circulation pump
EP3374642B1 (en) Electric axial-flow liquid pump for motor vehicle
DE2639914C2 (en)
DE102009004456A1 (en) Variable volume cell pump with swiveling spool
DE102012200806A1 (en) Wet runner pump with power electronics
DE102010046450A1 (en) Sealing for a controllable coolant pump
EP2002123B1 (en) Fluid pump
DE202017006981U1 (en) Improved electric motor for a fluid circulator
EP1945955B1 (en) Fluid pump
DE10006983A1 (en) Pump impeller for a centrifugal pump, in particular for a circulation pump that can be used in dishwashers or washing machines
DE2906224A1 (en) FUEL SUPPLY UNIT
EP2520806B1 (en) Motor pump unit
DE4221184A1 (en) Fuel delivery pump for vehicle IC engine - uses space between impeller and delivery channel to control direction of flow
DE3831457A1 (en) Electric motor-driven fluid pump
EP2072827A1 (en) Canned motor pump
EP3299627B1 (en) Feed pump
EP1148248B1 (en) Pump housing
EP3156663B1 (en) Centrifugal pump assembly
EP2786021B1 (en) Wet-rotor motor pump
WO2009043765A1 (en) Fuel pump for delivering fuel from a reservoir to an internal combustion engine
DE10019820C2 (en) Pump, in particular circulation pump for household machines such as dishwashers
EP3864294B1 (en) Fluid pump, water delivery unit, water injection system, internal combustion engine and vehicle

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

17P Request for examination filed

Effective date: 20120430

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20161102

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 880054

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170415

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502011011919

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 7

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

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170629

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170630

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

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

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170629

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

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

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

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

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170729

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170731

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502011011919

Country of ref document: DE

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

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed

Effective date: 20180103

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

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

Ref country code: IE

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

Effective date: 20170713

Ref country code: CH

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

Effective date: 20170731

Ref country code: LI

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

Effective date: 20170731

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

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

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

Ref country code: LU

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

Effective date: 20170713

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 8

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 880054

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170713

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

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

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

Ref country code: AT

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

Effective date: 20170713

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

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20110713

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

Ref country code: CY

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

Effective date: 20170329

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

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

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

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

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

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170329

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

Ref country code: NL

Payment date: 20230720

Year of fee payment: 13

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

Ref country code: GB

Payment date: 20230724

Year of fee payment: 13

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

Ref country code: FR

Payment date: 20230724

Year of fee payment: 13

Ref country code: DE

Payment date: 20230720

Year of fee payment: 13

Ref country code: BE

Payment date: 20230719

Year of fee payment: 13