EP2535591B1 - Centrifugal pump - Google Patents

Centrifugal pump Download PDF

Info

Publication number
EP2535591B1
EP2535591B1 EP11004859.2A EP11004859A EP2535591B1 EP 2535591 B1 EP2535591 B1 EP 2535591B1 EP 11004859 A EP11004859 A EP 11004859A EP 2535591 B1 EP2535591 B1 EP 2535591B1
Authority
EP
European Patent Office
Prior art keywords
sealing ring
wall
centrifugal pump
impeller
projections
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
EP11004859.2A
Other languages
German (de)
French (fr)
Other versions
EP2535591A1 (en
Inventor
Aage Bruhn
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.)
Grundfos Management AS
Original Assignee
Grundfos Management AS
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 Grundfos Management AS filed Critical Grundfos Management AS
Priority to EP11004859.2A priority Critical patent/EP2535591B1/en
Publication of EP2535591A1 publication Critical patent/EP2535591A1/en
Application granted granted Critical
Publication of EP2535591B1 publication Critical patent/EP2535591B1/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
    • F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel

Definitions

  • the invention relates to a centrifugal pump with at least one impeller and at least one fixed sealing ring, which is in sealing contact with the impeller.
  • a seal is required on the impeller in the region of the suction mouth which seals the suction side of the impeller against the pressure side.
  • This seal which is usually formed as a sealing ring is between the impeller, d. H. the suction port of the impeller and an adjacent housing part or an adjacent wall arranged to seal the gap between the impeller and the housing part or the wall by the sealing ring. It is known to fix the sealing ring on the housing part or the wall.
  • a centering with respect to the impeller is required to minimize the friction between the seal ring and impeller. This requires accurate tolerances of all components to ensure adequate centering. In addition, an accurate assembly is required.
  • DE 34 38 480 A1 discloses a multi-stage centrifugal pump with closed impeller housing.
  • a sealing ring is arranged between the impeller housing and the impeller on the input side of the impeller.
  • This sealing ring has recesses on its outer circumference, in which projections engage in the housing.
  • the sealing ring is not fixed in the axial direction of the housing.
  • the centrifugal pump according to the invention has at least one impeller which is sealed on the input side by means of a sealing ring.
  • the sealing ring is known to be arranged between the suction opening or the suction mouth of the impeller and an adjacent fixed housing part or a wall of the housing. The sealing ring thus seals the suction side of the impeller from the pressure side.
  • a multi-stage centrifugal pump unit such a seal at each pump stage, d. H. required on each wheel.
  • the sealing ring bears against a wall of a housing surrounding the impeller, wherein it surrounds an inlet opening in the wall.
  • the sealing ring bears against the wall in the peripheral region of the inlet opening, preferably without interfering with the inlet opening itself.
  • the inlet opening is preferably free of parts of the sealing ring.
  • the sealing ring rests only on the surface of the wall, surrounding the inlet opening. This has the advantage that the sealing ring is not centered in the inlet opening on the wall, but can be centered alone with respect to the impeller, so that a precise centering in the area in which the relative movement between the impeller and sealing ring takes place, in order to minimize friction in this area.
  • the radial fixation of the sealing ring takes place by projections formed on the wall. These projections are also formed outside the inlet opening on the wall at the surface thereof.
  • the projections or depressions engage with corresponding recesses on the sealing ring in such a way that it is fixed in the radial direction, preferably also in the circumferential direction.
  • the fixation of the sealing ring between the projections or recesses in the radial direction is preferably carried out with play, so that the projections or depressions cause no centering of the sealing ring on the wall to a precise position, but the sealing ring, preferably automatically, opposite the inlet opening or can cite the suction mouth of the impeller, so that in this area the friction is minimized.
  • Low position deviations of the sealing ring relative to the inlet opening in the wall are negligible in comparison.
  • the sealing ring is fixed to the wall by three spaced-apart projections.
  • Three spaced-apart projections when distributed over the circumference, preferably distributed uniformly around the circumference, allow for fixation in all radial directions. For example, three projections may be spaced 120 ° apart.
  • the projections are formed, which engage in each case in a recess formed on the sealing ring.
  • the recesses may preferably be formed on the outer circumference of the sealing ring.
  • the recesses may be open to the outer circumference, ie as from the outer circumference be formed radially inwardly directed indentations on the outer circumference of the sealing ring. This engagement has the advantage that at the same time there is still a fixation in the circumferential direction, that is, that the sealing ring can not rotate relative to the wall.
  • the projections are preferably arranged so that they are spaced in the radial direction from a side surface of the respectively associated recess.
  • all the projections may be arranged to the recesses in this way, or merely a projection on one side of the sealing ring to allow a mobility in only one radial direction.
  • a corresponding distance is provided on all the projections and recesses, so that the sealing ring can move in all radial directions by a certain amount in order to be able to center preferably relative to the impeller can.
  • the recesses are formed on the outer circumference of the sealing ring and preferably extend parallel to the central axis of the sealing ring.
  • the recesses further preferably extend over the entire axial length of the sealing ring.
  • three recesses are formed on the sealing ring, which engage with three corresponding projections on the wall.
  • the recesses, such as the associated projections are preferably distributed uniformly over the circumference of the sealing ring. This allows a radial fixation, possibly with the game described above, in all radial directions.
  • the projections form at least part of an axial fixation of the sealing ring on the wall. Ie. the sealing ring is fixed on the projections in the axial direction on the wall. This can be done via holding elements which engage the projections or are connected to the projections or are engaged.
  • At least one spring element is provided which holds the sealing ring in contact with the wall.
  • a spring element ensures a sufficient compressive force to hold the sealing ring in sealing engagement with the wall or the fixed housing part.
  • a certain axial play of the sealing ring 16 is made possible. This game is used to compensate for tolerances.
  • the ring is pressed against the wall.
  • the spring element which holds the sealing ring in contact with the wall despite the game.
  • the projections are formed, for example, as threaded pins or threaded sleeves.
  • corresponding screws can engage, with which the sealing ring is screwed or fixed axially on the wall.
  • corresponding nuts could be placed on threaded pins in order to fix the sealing ring on the wall in the axial direction via the screw connection.
  • screw elements engage with the threaded pins or threaded sleeves, wherein the screw elements each have a contact surface, which are in contact with one of the wall facing away from the side of the sealing ring in such a way that the sealing ring between the contact surface and the wall is axially fixed.
  • the contact surface thus engages around the sealing ring or engages behind the Wall facing away surface of the sealing ring to fix it axially on the wall.
  • the contact surface can, for example be formed by a screw head or a nut, wherein between the contact surface and the sealing ring may optionally be additionally arranged a washer.
  • At least one spring element is preferably arranged between the contact surface and the sealing ring. This is compressed axially as a compression spring when screwing the screw into the threaded sleeve or when screwing the screw on a threaded pin, so that a spring force is generated, which presses the sealing ring against the wall.
  • the centrifugal pump shown by way of example has a multi-stage design and has six stages 2 in this example.
  • the centrifugal pump has a suction nozzle 4 and a pressure port 6 in a known manner.
  • a not shown here electric drive motor can be flanged, which drives the shaft 10.
  • Each stage 2 has an impeller 12 which is rotatably mounted on the shaft 10.
  • nozzles 14 are arranged, which supply the flow emerging from a preceding impeller 12 radially inwards again to the suction mouth of the following impeller 12.
  • sealing rings 16 are provided. These sealing rings 16 are each attached to a wall 18 of the stage housing of the pump stages 2.
  • the wall 18 separates two adjacent stages 2 from each other.
  • the wall 18 has a central inlet opening 20, which simultaneously represents the outlet opening of a preceding in the flow direction of the nozzle 14.
  • the sealing ring 16 is now arranged so that it does not engage in the inlet opening 20 and thus is not fixed in the interior of the inlet opening 20, but only on the wall of the 18th the inlet opening 20 surrounding abuts.
  • the fixing takes place via four projections in the form of threaded sleeves 22, which are fastened or formed on the wall 18.
  • the threaded sleeves 22 extend parallel to the longitudinal axis X of the centrifugal pump of the wall 18 away and have inside a thread, in which fastening screws 24 engage.
  • the recesses 26 have a semi-cylindrical shape and also extend parallel to the longitudinal axis X and are radially spaced therefrom so located that the threaded sleeves 22 engage in the recess 26.
  • the radial distance of the recesses of the longitudinal axis X is selected so that the threaded sleeves 22 do not come directly to the wall of the recesses 26 to the system, but that between the threaded sleeve 22 and the wall of the recess 26, a gap 28 remains.
  • gaps 28 provide for a certain radial clearance between the sealing ring 16 and the projections formed by the threaded sleeves 22. This allows the sealing ring 16 to center relative to the impeller 12, so that a possible low-friction engagement of the impeller 12 in the interior of the sealing ring 16 is possible.
  • the heads of the fastening screws 24 define contact surfaces and come with between laid washers 30, on the wall 18 facing away from the axial end face 32 to the plant.
  • the sealing ring 16 can be clamped between the heads of the fastening screws 24 and the washers 30 on one side and the wall 18 on the other side, so that the sealing ring 16 sealingly comes to rest against the surface of the wall 18.
  • Fig. 4 in addition to the embodiment in Fig. 3 arranged between the head of the fastening screw 24 of the washer 30 acting as a compression spring coil spring 34.
  • the coil spring 34 causes a contact force which presses the sealing ring 16 against the wall 18, at the same time a certain mobility ensures that the centering or alignment of the sealing ring 16 favors the impeller and allows tolerance compensation.
  • a coil spring 34 can be arranged in each case on each fastening screw 24.

Landscapes

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

Description

Die Erfindung betrifft eine Kreiselpumpe mit zumindest einem Laufrad und zumindest einem feststehenden Dichtungsring, welcher mit dem Laufrad in dichtender Anlage ist.The invention relates to a centrifugal pump with at least one impeller and at least one fixed sealing ring, which is in sealing contact with the impeller.

Bei Kreiselpumpe ist am Laufrad im Bereich des Saugmundes eine Dichtung erforderlich, welche die Saugseite des Laufrades gegenüber der Druckseite abdichtet. Diese Dichtung, welche üblicherweise als Dichtungsring ausgebildet ist, wird zwischen dem Laufrad, d. h. dem Saugmund des Laufrades und einem angrenzenden Gehäuseteil bzw. einer angrenzenden Wandung angeordnet, um den Spalt zwischen dem Laufrad und dem Gehäuseteil bzw. der Wandung durch den Dichtungsring abzudichten. Dabei ist es bekannt, den Dichtungsring an dem Gehäuseteil bzw. der Wandung zu fixieren. Dabei ist jedoch gleichzeitig eine Zentrierung gegenüber dem Laufrad erforderlich, um die Reibung zwischen Dichtungsring und Laufrad zu minimieren. Dies erfordert genaue Toleranzen sämtlicher Bauteile, um eine ausreichende Zentrierung zu gewährleisten. Darüber hinaus ist eine genaue Montage erforderlich.In the case of a centrifugal pump, a seal is required on the impeller in the region of the suction mouth which seals the suction side of the impeller against the pressure side. This seal, which is usually formed as a sealing ring is between the impeller, d. H. the suction port of the impeller and an adjacent housing part or an adjacent wall arranged to seal the gap between the impeller and the housing part or the wall by the sealing ring. It is known to fix the sealing ring on the housing part or the wall. However, at the same time a centering with respect to the impeller is required to minimize the friction between the seal ring and impeller. This requires accurate tolerances of all components to ensure adequate centering. In addition, an accurate assembly is required.

DE 34 38 480 A1 offenbart eine mehrstufige Kreiselpumpe mit geschlossenem Laufradgehäuse. Bei dieser ist zwischen dem Laufradgehäuse und dem Laufrad an der Eingangsseite des Laufrades ein Dichtring angeordnet. Dieser Dichtring weist an seinem Außenumfang Ausnehmungen auf, in welche Vorsprünge in dem Gehäuse eingreifen. Allerdings ist bei dieser Ausgestaltung der Dichtungsring nicht in axialer Richtung am Gehäuse fixiert. DE 34 38 480 A1 discloses a multi-stage centrifugal pump with closed impeller housing. In this, a sealing ring is arranged between the impeller housing and the impeller on the input side of the impeller. This sealing ring has recesses on its outer circumference, in which projections engage in the housing. However, in this embodiment, the sealing ring is not fixed in the axial direction of the housing.

Im Hinblick auf diese Problematik ist es Aufgabe der Erfindung, eine Kreiselpumpe dahingehend zu verbessern, dass ein die Eintrittsseite des Laufrades abdichtender Dichtungsring einfacher zu montieren und einfacher relativ zu dem Laufrad zu zentrieren ist, ohne auf besonders geringe Toleranzen der Bauteile achten zu müssen.In view of this problem, it is an object of the invention to improve a centrifugal pump to the effect that a the inlet side of the impeller sealing sealing ring easier to install and easier to center relative to the impeller, without having to pay attention to particularly low tolerances of the components.

Diese Aufgabe wird durch eine Kreiselpumpe mit den in Anspruch 1 angegebenen Merkmalen gelöst. Bevorzugte Ausführungsformen ergeben sich aus den Unteransprüchen, der nachfolgenden Beschreibung sowie den beigefügten Figuren.This object is achieved by a centrifugal pump having the features specified in claim 1. Preferred embodiments will become apparent from the subclaims, the following description and the accompanying figures.

Die erfindungsgemäße Kreiselpumpe weist zumindest ein Laufrad auf, welches mit Hilfe eines Dichtungsringes eingangsseitig abgedichtet ist. Dabei ist der Dichtungsring bekannterweise zwischen der Saugöffnung bzw. dem Saugmund des Laufrades und einem angrenzenden feststehenden Gehäuseteil bzw. einer Wandung des Gehäuses angeordnet. Der Dichtungsring dichtet somit die Saugseite des Laufrades gegenüber der Druckseite ab. Im Falle eines mehrstufigen Kreiselpumpenaggregates ist eine solche Abdichtung an jeder Pumpenstufe, d. h. an jedem Laufrad erforderlich.The centrifugal pump according to the invention has at least one impeller which is sealed on the input side by means of a sealing ring. In this case, the sealing ring is known to be arranged between the suction opening or the suction mouth of the impeller and an adjacent fixed housing part or a wall of the housing. The sealing ring thus seals the suction side of the impeller from the pressure side. In the case of a multi-stage centrifugal pump unit such a seal at each pump stage, d. H. required on each wheel.

Erfindungsgemäß liegt der Dichtungsring an einer Wandung eines das Laufrad umgebenden Gehäuses an, wobei er eine Eintrittsöffnung in der Wandung umgibt. D. h. der Dichtungsring liegt an der Wandung im Umfangsbereich der Eintrittsöffnung an, vorzugsweise ohne in die Eintrittsöffnung selber einzugreifen. Insofern ist die Eintrittsöffnung vorzugsweise frei von Teilen des Dichtungsringes. Der Dichtungsring liegt lediglich an der Oberfläche der Wandung, die Eintrittsöffnung umgebend, an. Dies hat den Vorteil, dass der Dichtungsring nicht in der Eintrittsöffnung an der Wandung zentriert wird, sondern allein gegenüber dem Laufrad zentriert werden kann, sodass eine genaue Zentrierung in dem Bereich, in dem die Relativbewegung zwischen Laufrad und Dichtungsring stattfindet, erfolgen kann, um in diesem Bereich die Reibung zu minimieren.According to the invention, the sealing ring bears against a wall of a housing surrounding the impeller, wherein it surrounds an inlet opening in the wall. Ie. the sealing ring bears against the wall in the peripheral region of the inlet opening, preferably without interfering with the inlet opening itself. In this respect, the inlet opening is preferably free of parts of the sealing ring. The sealing ring rests only on the surface of the wall, surrounding the inlet opening. This has the advantage that the sealing ring is not centered in the inlet opening on the wall, but can be centered alone with respect to the impeller, so that a precise centering in the area in which the relative movement between the impeller and sealing ring takes place, in order to minimize friction in this area.

Die radiale Fixierung des Dichtungsringes, welcher vorzugsweise nicht in die Eintrittsöffnung eingreift, erfolgt durch an der Wandung ausgebildete Vorsprünge. Diese Vorsprünge sind ebenfalls außerhalb der Eintrittsöffnung an der Wandung an deren Oberfläche ausgebildet. Die Vorsprünge oder Vertiefungen treten mit korrespondierenden Ausnehmungen an dem Dichtungsring so in Eingriff, dass dieser in radialer Richtung, vorzugsweise auch in Umfangsrichtung fixiert wird.The radial fixation of the sealing ring, which preferably does not engage in the inlet opening, takes place by projections formed on the wall. These projections are also formed outside the inlet opening on the wall at the surface thereof. The projections or depressions engage with corresponding recesses on the sealing ring in such a way that it is fixed in the radial direction, preferably also in the circumferential direction.

Dabei erfolgt die Fixierung des Dichtungsringes zwischen den Vorsprüngen oder Vertiefungen in radialer Richtung vorzugsweise mit Spiel, sodass auch die Vorsprünge oder Vertiefungen keine Zentrierung des Dichtungsringes an der Wandung auf eine genaue Position bewirken, sondern der Dichtungsring sich, vorzugsweise selbsttätig, gegenüber der Eintrittsöffnung bzw. dem Saugmund des Laufrades zitieren kann, sodass in diesem Bereich die Reibung minimiert wird. Geringe Lageabweichungen des Dichtungsringes relativ zu der Eintrittsöffnung in der Wandung sind demgegenüber unerheblich.Here, the fixation of the sealing ring between the projections or recesses in the radial direction is preferably carried out with play, so that the projections or depressions cause no centering of the sealing ring on the wall to a precise position, but the sealing ring, preferably automatically, opposite the inlet opening or can cite the suction mouth of the impeller, so that in this area the friction is minimized. Low position deviations of the sealing ring relative to the inlet opening in the wall are negligible in comparison.

Der Dichtungsring ist an der Wandung durch drei voneinander beabstandete Vorsprünge fixiert. Drei voneinander beabstandete Vorsprünge ermöglichen, wenn sie über den Umfang verteilt angeordnet sind, vorzugsweise gleichmäßig über den Umfang verteilt angeordnet sind, eine Fixierung in allen radialen Richtungen. Beispielsweise können drei Vorsprünge um 120° beabstandet sein.The sealing ring is fixed to the wall by three spaced-apart projections. Three spaced-apart projections, when distributed over the circumference, preferably distributed uniformly around the circumference, allow for fixation in all radial directions. For example, three projections may be spaced 120 ° apart.

An der Wandung sind die Vorsprünge ausgebildet, welche jeweils in eine an dem Dichtungsring ausgebildete Ausnehmung eingreifen. Dabei können die Ausnehmungen vorzugsweise am Außenumfang des Dichtungsringes ausgebildet sein. Die Ausnehmungen können dabei zum Außenumfang hin geöffnet sein, d. h. als vom Außenumfang her radial nach innen gerichtete Einbuchtungen am Außenumfang des Dichtungsringes ausgebildet sein. Dieser Eingriff hat den Vorteil, dass gleichzeitig auch noch eine Fixierung in Umfangsrichtung erfolgt, d. h. dass der Dichtungsring sich nicht relativ zu der Wandung drehen kann.On the wall, the projections are formed, which engage in each case in a recess formed on the sealing ring. The recesses may preferably be formed on the outer circumference of the sealing ring. The recesses may be open to the outer circumference, ie as from the outer circumference be formed radially inwardly directed indentations on the outer circumference of the sealing ring. This engagement has the advantage that at the same time there is still a fixation in the circumferential direction, that is, that the sealing ring can not rotate relative to the wall.

Die Vorsprünge sind vorzugsweise so angeordnet, dass sie in radialer Richtung von einer Seitenfläche der jeweils zugehörigen Ausnehmung beabstandet sind. Dabei können alle Vorsprünge zu den Ausnehmungen in dieser Weise angeordnet sein oder lediglich ein Vorsprung an einer Seite des Dichtungsringes, um eine Beweglichkeit in nur einer radialen Richtung zuzulassen. Vorzugsweise ist ein entsprechender Abstand jedoch an allen Vorsprüngen und Ausnehmungen vorgesehen, sodass der Dichtungsring sich in allen radialen Richtungen um ein gewisses Maß bewegen kann, um sich bevorzugt relativ zu dem Laufrad zentrieren zu können. Weiter bevorzugt sind die Ausnehmungen am Außenumfang des Dichtungsringes ausgebildet und erstrecken sich vorzugsweise parallel zur Mittelachse des Dichtungsringes. Dabei erstrecken sich die Ausnehmungen weiter bevorzugt über die gesamte axiale Länge des Dichtungsringes. So können sich in axialer Richtung von der Wandung erstreckende Stifte, welche die Vorsprünge bilden, in diese Ausnehmungen eingreifen.The projections are preferably arranged so that they are spaced in the radial direction from a side surface of the respectively associated recess. In this case, all the projections may be arranged to the recesses in this way, or merely a projection on one side of the sealing ring to allow a mobility in only one radial direction. Preferably, however, a corresponding distance is provided on all the projections and recesses, so that the sealing ring can move in all radial directions by a certain amount in order to be able to center preferably relative to the impeller can. More preferably, the recesses are formed on the outer circumference of the sealing ring and preferably extend parallel to the central axis of the sealing ring. In this case, the recesses further preferably extend over the entire axial length of the sealing ring. Thus, in the axial direction of the wall extending pins which form the projections, engage in these recesses.

Erfindungsgemäß sind drei Ausnehmungen an dem Dichtungsring ausgebildet, welche mit drei korrespondierenden Vorsprüngen an der Wandung in Eingriff treten. Dabei sind die Ausnehmungen, wie die zugehörigen Vorsprünge vorzugsweise gleichmäßig über den Umfang des Dichtungsringes verteilt. Dies ermöglicht eine radiale Fixierung, gegebenenfalls mit dem vorangehend beschriebenen Spiel, in allen radialen Richtungen.According to the invention, three recesses are formed on the sealing ring, which engage with three corresponding projections on the wall. The recesses, such as the associated projections are preferably distributed uniformly over the circumference of the sealing ring. This allows a radial fixation, possibly with the game described above, in all radial directions.

Darüber hinaus bilden die Vorsprünge zumindest einen Teil einer axialen Fixierung des Dichtungsringes an der Wandung. D. h. der Dichtungsring wird über die Vorsprünge in axialer Richtung an der Wandung fixiert. Dies kann über Halteelemente geschehen, welche an den Vorsprüngen angreifen bzw. mit den Vorsprüngen verbunden sind oder in Eingriff sind.In addition, the projections form at least part of an axial fixation of the sealing ring on the wall. Ie. the sealing ring is fixed on the projections in the axial direction on the wall. This can be done via holding elements which engage the projections or are connected to the projections or are engaged.

Dabei ist zumindest ein Federelement vorgesehen, welches den Dichtungsring in Anlage mit der Wandung hält. Ein solches Federelement stellt eine ausreichende Druckkraft sicher, um den Dichtungsring in dichtender Anlage mit der Wandung bzw. dem feststehenden Gehäuseteil zu halten. Gleichzeitig wird ein gewisses axiales Spiel des Dichtungsringes 16 ermöglicht. Dieses Spiel dient dazu, Toleranzen auszugleichen. Bei hohem Druck auf der Druckseite der jeweiligen Pumpenstufe wird der Ring gegen die Wandung gedrückt. Wenn die Pumpe jedoch mit geringerem Druck und höherem Durchfluss arbeitet, ist es möglich, dass der Ring sich in axialer Richtung bewegt. Dies wird durch das Federelement verhindert, welches trotz des Spiels den Dichtungsring in Anlage mit der Wandung hält.In this case, at least one spring element is provided which holds the sealing ring in contact with the wall. Such a spring element ensures a sufficient compressive force to hold the sealing ring in sealing engagement with the wall or the fixed housing part. At the same time a certain axial play of the sealing ring 16 is made possible. This game is used to compensate for tolerances. At high pressure on the pressure side of the respective pump stage, the ring is pressed against the wall. However, when the pump is operating at lower pressure and higher flow, it is possible for the ring to move in the axial direction. This is prevented by the spring element, which holds the sealing ring in contact with the wall despite the game.

Um eine axiale Fixierung zu ermöglichen, sind die Vorsprünge beispielsweise als Gewindestifte oder Gewindehülsen ausgebildet. In die Gewindehülsen können korrespondierende Schrauben eingreifen, mit welchen der Dichtungsring axial an der Wandung angeschraubt bzw. fixiert wird. Entsprechend könnten auf Gewindestifte korrespondierende Muttern aufgesetzt werden, um über die Schraubverbindung den Dichtungsring an der Wandung in axialer Richtung zu fixieren.In order to allow axial fixation, the projections are formed, for example, as threaded pins or threaded sleeves. In the threaded sleeves corresponding screws can engage, with which the sealing ring is screwed or fixed axially on the wall. Correspondingly, corresponding nuts could be placed on threaded pins in order to fix the sealing ring on the wall in the axial direction via the screw connection.

So sind vorzugsweise Schraubelemente mit den Gewindestiften oder Gewindehülsen in Eingriff, wobei die Schraubelemente jeweils eine Anlagefläche aufweisen, welche mit einer der Wandung abgewandten Seite des Dichtungsringes derart in Anlage sind, dass der Dichtungsring zwischen der Anlagefläche und der Wandung axial fixiert ist. Die Anlagefläche umgreift somit den Dichtungsring bzw. hintergreift die der Wandung abgewandte Oberfläche des Dichtungsringes, um diesen axial an der Wandung zu fixieren. Die Anlagefläche kann beispielsweise von einem Schraubenkopf oder einer Mutter gebildet werden, wobei zwischen der Anlagefläche und dem Dichtungsring gegebenenfalls zusätzlich eine Unterlegscheibe angeordnet sein.Thus, preferably, screw elements engage with the threaded pins or threaded sleeves, wherein the screw elements each have a contact surface, which are in contact with one of the wall facing away from the side of the sealing ring in such a way that the sealing ring between the contact surface and the wall is axially fixed. The contact surface thus engages around the sealing ring or engages behind the Wall facing away surface of the sealing ring to fix it axially on the wall. The contact surface can, for example be formed by a screw head or a nut, wherein between the contact surface and the sealing ring may optionally be additionally arranged a washer.

Bei der Verwendung eines Federelementes ist vorzugsweise zwischen der Anlagefläche und dem Dichtungsring zumindest ein Federelement angeordnet. Dieses wird als Druckfeder beim Einschrauben des Schraubelements in die Gewindehülse bzw. beim Aufschrauben des Schraubelementes auf einen Gewindestift axial gestaucht, sodass eine Federkraft erzeugt wird, welche den Dichtungsring gegen die Wandung drückt.When using a spring element, at least one spring element is preferably arranged between the contact surface and the sealing ring. This is compressed axially as a compression spring when screwing the screw into the threaded sleeve or when screwing the screw on a threaded pin, so that a spring force is generated, which presses the sealing ring against the wall.

Nachfolgend wird die Erfindung beispielhaft anhand der beigefügten Figuren beschrieben. In diesen zeigt:

Fig. 1
eine Schnittansicht einer Kreiselpumpe,
Fig. 2
vergrößert den Ausschnitt 11 in Fig. 1,
Fig. 3
eine perspektivische Explosionsansicht der Befestigung eines Dichtungsringes in der Kreiselpumpe gemäß den Fig. 1 und 2,
Fig. 4
vergrößert die Anordnung einer Befestigungsschraube in einer alternativen Ausführungsform der Erfindung,
Fig. 5
eine Schnittansicht des befestigten Dichtungsringes quer zur Längsachse der Kreiselpumpe, und
Fig. 6
eine vergrößerte Ausschnittansicht des Ausschnittes VI in Fig. 5.
The invention will now be described by way of example with reference to the accompanying drawings. In these shows:
Fig. 1
a sectional view of a centrifugal pump,
Fig. 2
increases the section 11 in Fig. 1 .
Fig. 3
an exploded perspective view of the attachment of a sealing ring in the centrifugal pump according to the Fig. 1 and 2 .
Fig. 4
enlarges the arrangement of a fastening screw in an alternative embodiment of the invention,
Fig. 5
a sectional view of the attached sealing ring transverse to the longitudinal axis of the centrifugal pump, and
Fig. 6
an enlarged sectional view of the section VI in Fig. 5 ,

Die in Fig. 1 beispielhaft gezeigte Kreiselpumpe ist mehrstufig ausgebildet und weist in diesem Beispiel sechs Stufen 2 auf. Die Kreiselpumpe weist in bekannter Weise einen Saugstutzen 4 und einen Druckstutzen 6 auf. Am in Fig. 1 oberen Ende 8 kann ein hier nicht gezeigter elektrischer Antriebsmotor angeflanscht werden, welcher die Welle 10 antreibt. Jede Stufe 2 hat ein Laufrad 12, welches drehfest auf der Welle 10 angeordnet ist. Zwischen den einzelnen Laufrädern 12 sind Leitapparate 14 angeordnet, welche die aus einem vorangehenden Laufrad 12 austretende Strömung radial wieder nach innen dem Saugmund des nachfolgenden Laufrades 12 zuführen. Zwischen der Ausgangsseite jedes Leitapparates 14 und der Eingangsseite bzw. dem Saugmund des in Strömungsrichtung folgenden Laufrades 12 ist eine Dichtung erforderlich, um zu verhindern, dass unter Druck stehendes Fluid von der Druckseite des Laufrades 12 direkt wieder zu Eingangsseite desselben Laufrades 12 strömen kann. Hierzu sind Dichtungsringe 16 vorgesehen. Diese Dichtungsringe 16 sind jeweils an einer Wandung 18 des Stufengehäuses der Pumpenstufen 2 befestigt. Die Wandung 18 trennt zwei aneinander angrenzende Stufen 2 voneinander. Die Wandung 18 weist eine zentrale Eintrittsöffnung 20 auf, welche gleichzeitig die Austrittsöffnung eines in Strömungsrichtung vorangehenden Leitapparates 14 darstellt. Durch die Eintrittsöffnung 20 strömt das Fluid in den Saugmund des nächsten Laufrades 12. Erfindungsgemäß ist der Dichtungsring 16 nun so angeordnet, dass sie nicht in die Eintrittsöffnung 20 eingreift und somit auch nicht im Inneren der Eintrittsöffnung 20 fixiert ist, sondern lediglich an der Wandung 18 die Eintrittsöffnung 20 umgebend anliegt. Die Fixierung erfolgt über vier Vorsprünge in Form von Gewindehülsen 22, welche an der Wandung 18 befestigt bzw. ausgebildet sind. Die Gewindehülsen 22 erstrecken sich parallel zur Längsachse X der Kreiselpumpe von der Wandung 18 weg und weisen im Inneren ein Gewinde auf, in welches Befestigungsschrauben 24 eingreifen.In the Fig. 1 The centrifugal pump shown by way of example has a multi-stage design and has six stages 2 in this example. The centrifugal pump has a suction nozzle 4 and a pressure port 6 in a known manner. At the in Fig. 1 upper end 8, a not shown here electric drive motor can be flanged, which drives the shaft 10. Each stage 2 has an impeller 12 which is rotatably mounted on the shaft 10. Between the individual wheels 12, nozzles 14 are arranged, which supply the flow emerging from a preceding impeller 12 radially inwards again to the suction mouth of the following impeller 12. Between the output side of each nozzle 14 and the inlet side or the suction port of the impeller following in the flow direction 12, a seal is required to prevent pressurized fluid from the pressure side of the impeller 12 can flow directly back to the inlet side of the same impeller 12. For this purpose, sealing rings 16 are provided. These sealing rings 16 are each attached to a wall 18 of the stage housing of the pump stages 2. The wall 18 separates two adjacent stages 2 from each other. The wall 18 has a central inlet opening 20, which simultaneously represents the outlet opening of a preceding in the flow direction of the nozzle 14. According to the invention the sealing ring 16 is now arranged so that it does not engage in the inlet opening 20 and thus is not fixed in the interior of the inlet opening 20, but only on the wall of the 18th the inlet opening 20 surrounding abuts. The fixing takes place via four projections in the form of threaded sleeves 22, which are fastened or formed on the wall 18. The threaded sleeves 22 extend parallel to the longitudinal axis X of the centrifugal pump of the wall 18 away and have inside a thread, in which fastening screws 24 engage.

Am Außenumfang des Dichtungsringes 16 sind am den den Winkelposition der Gewindehülsen 22 in entsprechenden Winkelpositionen im Wesentlichen halbkreisförmige Ausnehmungen 26 ausgebildet. Die Ausnehmungen 26 haben eine halbzylindrische Form und erstrecken sich ebenfalls parallel zur Längsachse X und sind von dieser radial beabstandet so gelegen, dass die Gewindehülsen 22 in die Ausnehmung 26 eingreifen. Dabei ist der radiale Abstand der Ausnehmungen von der Längsachse X so gewählt, dass die Gewindehülsen 22 nicht direkt an der Wandung der Ausnehmungen 26 zur Anlage kommen, sondern dass zwischen der Gewindehülse 22 und der Wandung der Ausnehmung 26 ein Spalt 28 verbleibt. Diese Spalte 28 sorgen für ein gewisses radiales Spiel zwischen dem Dichtungsring 16 und den von den Gewindehülsen 22 gebildeten Vorsprüngen. Dies ermöglicht dem Dichtungsring 16 sich relativ zu dem Laufrad 12 zu zentrieren, sodass ein möglichst reibungsarmer Eingriff des Laufrades 12 in das Innere des Dichtungsringes 16 möglich wird.On the outer circumference of the sealing ring 16 are formed in the angular position of the threaded sleeves 22 in corresponding angular positions substantially semicircular recesses 26. The recesses 26 have a semi-cylindrical shape and also extend parallel to the longitudinal axis X and are radially spaced therefrom so located that the threaded sleeves 22 engage in the recess 26. The radial distance of the recesses of the longitudinal axis X is selected so that the threaded sleeves 22 do not come directly to the wall of the recesses 26 to the system, but that between the threaded sleeve 22 and the wall of the recess 26, a gap 28 remains. These gaps 28 provide for a certain radial clearance between the sealing ring 16 and the projections formed by the threaded sleeves 22. This allows the sealing ring 16 to center relative to the impeller 12, so that a possible low-friction engagement of the impeller 12 in the interior of the sealing ring 16 is possible.

Die axiale Befestigung des Dichtungsringes 16 erfolgt über die Befestigungsschrauben 24, welche in die Gewindehülsen 22 eingeschraubt sind. Die Köpfe der Befestigungsschrauben 24 definieren Anlageflächen und kommen mit zwischen gelegten Unterlegscheiben 30, an der der Wandung 18 abgewandten axialen Stirnseite 32 zur Anlage. So kann der Dichtungsring 16 zwischen den Köpfen der Befestigungsschrauben 24 bzw. den Unterlegscheiben 30 auf der einen Seite und der Wandung 18 auf der anderen Seite geklemmt werden, sodass der Dichtungsring 16 dichtend an der Oberfläche der Wandung 18 zur Anlage kommt. Um eine gleichmäßige Anlagekraft zu erreichen, ist in dem Ausführungsbeispiel gemäß Fig. 4 zusätzlich zu der Ausführungsform in Fig. 3 zwischen dem Kopf der Befestigungsschraube 24 der Unterlegscheibe 30 eine als Druckfeder wirkende Schraubenfeder 34 angeordnet. Die Schraubenfeder 34 bewirkt eine Anlagekraft, welche den Dichtungsring 16 gegen die Wandung 18 drückt, gleichzeitig wird eine gewisse Beweglichkeit gewährleistet, welche die Zentrierung bzw. Ausrichtung des Dichtungsringes 16 zu dem Laufrad begünstigt und einen Toleranzausgleich ermöglicht. Eine solche Schraubenfeder 34 kann jeweils an jeder Befestigungsschraube 24 angeordnet sein.The axial attachment of the sealing ring 16 via the fastening screws 24, which are screwed into the threaded sleeves 22. The heads of the fastening screws 24 define contact surfaces and come with between laid washers 30, on the wall 18 facing away from the axial end face 32 to the plant. Thus, the sealing ring 16 can be clamped between the heads of the fastening screws 24 and the washers 30 on one side and the wall 18 on the other side, so that the sealing ring 16 sealingly comes to rest against the surface of the wall 18. In order to achieve a uniform contact force is in the embodiment according to Fig. 4 in addition to the embodiment in Fig. 3 arranged between the head of the fastening screw 24 of the washer 30 acting as a compression spring coil spring 34. The coil spring 34 causes a contact force which presses the sealing ring 16 against the wall 18, at the same time a certain mobility ensures that the centering or alignment of the sealing ring 16 favors the impeller and allows tolerance compensation. Such a coil spring 34 can be arranged in each case on each fastening screw 24.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

22
- Stufen- Stages
44
- Saugstutzen- Suction nozzle
66
- Druckstutzen- discharge nozzle
88th
- oberes Ende- top end
1010
- Welle- Wave
1212
- Laufräder- wheels
1414
- Leitapparate- Diffusers
1616
- Dichtungsring- sealing ring
1818
- Wandung- wall
2020
- Eintrittsöffnung- entrance opening
2222
- Gewindehülsen- threaded sleeves
2424
- Befestigungsschrauben- fixing screws
2626
- Ausnehmungen- recesses
2828
- Spalt- split
3030
- Unterlegscheiben- washers
3232
- Stirnseite- front side
3434
- Feder- Feather
XX
- Längsachse- longitudinal axis

Claims (9)

  1. A centrifugal pump with at least one impeller (12) and at least one stationary sealing ring (16) which is in sealing bearing contact with the impeller (12), wherein the sealing ring (16) bears on a wall (18) of a housing surrounding the impeller (12), surrounds an entry opening (20) in the wall (18) and is fixed in the radial direction by three projections (22) which are formed on the wall (18) and which in each case engage into a recess (26) formed on the sealing ring (16), characterised in that the projections (22) at least also form a part of an axial fixation of the sealing ring (16) on the wall (18), and the sealing ring (16) is held in bearing contact with the wall (18) by way of at least one spring element (34).
  2. A centrifugal pump according to claim 1, characterised in that the entry opening (20) is free of parts of the sealing ring (16).
  3. A centrifugal pump according to one of the preceding claims, characterised in that the sealing ring (16) is fixed in the radial direction with play, between the projections (22) or recesses.
  4. A centrifugal pump according to claim 1, characterised in that at least one projection (22) is distanced in the radial direction to a side surface of the associated recess (26).
  5. A centrifugal pump according to one of the preceding claims, characterised in that the recesses (26) are formed on the outer periphery of the sealing ring (16) and preferably extend parallel to the middle axis (X) of the sealing ring (16).
  6. A centrifugal pump according to one of the preceding claims, characterised in that three recesses (26) are formed on the sealing ring (16) and are uniformly distributed over the periphery of the sealing ring (10).
  7. A centrifugal pump according to one of the preceding claims, characterised in that the projections are designed as threaded pins or threaded sleeves (22).
  8. A centrifugal pump according to claim 7, characterised in that screw elements (24) are engaged with the threaded pins or threaded sleeves (22), wherein the screw elements (24) in each case have a contact surface which is in bearing contact with a side of the sealing ring (16) which is away from the wall (18), in a manner such that the sealing ring (16) is axially fixed between the contact surface and the wall (18).
  9. A centrifugal pump according to claim 8, characterised in that at least one spring element (34) is arranged between the contact surface and the sealing ring (16).
EP11004859.2A 2011-06-15 2011-06-15 Centrifugal pump Active EP2535591B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11004859.2A EP2535591B1 (en) 2011-06-15 2011-06-15 Centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11004859.2A EP2535591B1 (en) 2011-06-15 2011-06-15 Centrifugal pump

Publications (2)

Publication Number Publication Date
EP2535591A1 EP2535591A1 (en) 2012-12-19
EP2535591B1 true EP2535591B1 (en) 2014-04-23

Family

ID=44772636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11004859.2A Active EP2535591B1 (en) 2011-06-15 2011-06-15 Centrifugal pump

Country Status (1)

Country Link
EP (1) EP2535591B1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039435A1 (en) * 1980-05-02 1981-11-11 Jacuzzi Inc. Free floating sealing disk for centrifugal fluid pump
DE3438480A1 (en) * 1983-10-21 1985-05-09 Jacuzzi Europe S.P.A., Valvasone MULTI-STAGE CENTRIFUGAL PUMP WITH CLOSED IMPELLER HOUSING

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19613486C2 (en) * 1996-04-04 1998-12-24 Grundfos As Formation of seals for centrifugal pumps to reduce the gap leakage current in the suction mouth area of the pump impeller
JP3841642B2 (en) * 1997-09-30 2006-11-01 株式会社荏原製作所 Centrifugal pump and its sealing mechanism
DE19960160B4 (en) * 1999-12-14 2014-09-11 Mahle International Gmbh Device for optimizing the gap width of centrifugal pumps
JP4532142B2 (en) * 2003-12-22 2010-08-25 株式会社荏原製作所 Fluid machinery sealing mechanism or centrifugal pump
DE102008001814A1 (en) * 2008-05-15 2009-11-19 Würdig, Uwe Device for impeller sealing in centrifugal pumps

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039435A1 (en) * 1980-05-02 1981-11-11 Jacuzzi Inc. Free floating sealing disk for centrifugal fluid pump
DE3438480A1 (en) * 1983-10-21 1985-05-09 Jacuzzi Europe S.P.A., Valvasone MULTI-STAGE CENTRIFUGAL PUMP WITH CLOSED IMPELLER HOUSING

Also Published As

Publication number Publication date
EP2535591A1 (en) 2012-12-19

Similar Documents

Publication Publication Date Title
EP2715201B1 (en) Combination of a plastic hose for laboratory equipments and of a threaded element
EP2019219B1 (en) Connection of two bodies which can be rotated around a common rotation axis
EP3079793B1 (en) Filter system and element with sealing device
DE102009053102B4 (en) Turbocharger having a thrust bearing arrangement for a shaft of the turbocharger
DE102017122236A1 (en) Fixing system for fastening a component to a carrier component
WO2016034340A1 (en) Eccentric screw pump
DE2106208C3 (en)
WO2015113534A1 (en) Camshaft amplifier
WO2012159779A1 (en) Rolling bearing arrangement with clamping means which support a positive locking action
DE202005018266U1 (en) Device for pressing in a wheel bearing seated on a wheel hub
DE102012005949A1 (en) Two-spindle screw pump in double-flow design
DE102016124805B4 (en) membrane valve
EP2184822B1 (en) Submersible motor
EP2535591B1 (en) Centrifugal pump
EP3290552B1 (en) Godet roller
EP2818722B1 (en) Centrifugal pump
EP3106691B1 (en) Bearing socket, distribution element and vacuum pump
EP2816198B1 (en) Guide vane assembly, guide vane and method for mounting a guide vane
DE102013213514A1 (en) Device for securing clamping nut of bearing arrangement of transmission shaft from unintentional loosening, has disc shaped structure whose segments are fixed together on radial inner component along radial direction by attaching unit
DE102011111706A1 (en) ROTARY
DE19745010C2 (en) Hydraulic motor
DE102004012396A1 (en) Elastic shaft coupling
EP2927425A1 (en) Rotor for a gas turbine having an anti-rotation device for a shaft nut
EP2963264B1 (en) Modular control valve
DE102009043685B4 (en) Assembly with securing means

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: 20120523

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

17Q First examination report despatched

Effective date: 20130502

RBV Designated contracting states (corrected)

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

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20131105

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: 664031

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140515

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: 502011002782

Country of ref document: DE

Effective date: 20140605

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20140423

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

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: 20140823

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: 20140423

Ref country code: CY

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: 20140423

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: 20140723

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: 20140724

Ref country code: NL

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: 20140423

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: 20140723

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: 20140423

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

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: 20140423

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: 20140423

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: 20140423

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: 20140423

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: 20140423

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: 20140423

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

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: 20140825

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502011002782

Country of ref document: DE

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: 20140423

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: 20140423

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: 20140423

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: 20140423

Ref country code: LU

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: 20140615

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: 20140423

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: 20140423

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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: IE

Ref legal event code: MM4A

26N No opposition filed

Effective date: 20150126

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

Ref country code: CH

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

Effective date: 20140630

Ref country code: IE

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

Effective date: 20140615

Ref country code: LI

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

Effective date: 20140630

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502011002782

Country of ref document: DE

Effective date: 20150126

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: 20140423

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: 20140423

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 6

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

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: 20140423

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

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: 20110615

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: 20140423

Ref country code: BE

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: 20140630

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: AT

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: 20140423

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 664031

Country of ref document: AT

Kind code of ref document: T

Effective date: 20160615

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160615

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 8

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: 20140423

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: 20140423

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502011002782

Country of ref document: DE

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

Ref country code: FR

Payment date: 20230627

Year of fee payment: 13

Ref country code: DE

Payment date: 20230620

Year of fee payment: 13

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

Ref country code: IT

Payment date: 20230623

Year of fee payment: 13

Ref country code: GB

Payment date: 20230622

Year of fee payment: 13