EP2766608B1 - Pompe centrifuge pour fluide contenant des particules solides avec fermeture d'un interstice - Google Patents

Pompe centrifuge pour fluide contenant des particules solides avec fermeture d'un interstice Download PDF

Info

Publication number
EP2766608B1
EP2766608B1 EP12788429.4A EP12788429A EP2766608B1 EP 2766608 B1 EP2766608 B1 EP 2766608B1 EP 12788429 A EP12788429 A EP 12788429A EP 2766608 B1 EP2766608 B1 EP 2766608B1
Authority
EP
European Patent Office
Prior art keywords
sealing element
centrifugal pump
impeller
wheel
pump according
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.)
Not-in-force
Application number
EP12788429.4A
Other languages
German (de)
English (en)
Other versions
EP2766608A1 (fr
Inventor
Uwe Würdig
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2766608A1 publication Critical patent/EP2766608A1/fr
Application granted granted Critical
Publication of EP2766608B1 publication Critical patent/EP2766608B1/fr
Not-in-force 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
    • 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
    • F04D29/086—Sealings especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous

Definitions

  • the invention relates to a centrifugal pump with a single-sided impeller for the promotion of solids containing liquids and with a rear gap seal. It refers, but is not limited to, preferably to a solution for centrifugal pumps for sewage extraction, ie for the promotion of contaminated with solids water.
  • Sealing arrangements for sealing the gap to Rabineraum are also by the US 2,270,054 and the EP 0 395 236 disclosed.
  • the sealing of Ra07raums comparatively close to the impeller driving shaft. Fibrous components of the conveyed can thus possibly jam in the radially outer region between the impeller and the pump housing and block the impeller.
  • the EP 0 395 236 details of the sealing arrangement, which apparently consists largely of rigid elements, are not described.
  • the subject of the document is so far rather the separation and the discharge in the viscous medium to be delivered contained gases. For the latter, a tube is provided, through which gases are led out of the Rarierraum in the outer environment of the pump.
  • a centrifugal pump with a seal arrangement for the gap formed in Ra07raum the pump known.
  • a freely movable elastic sealing element is arranged within the gap between two rigid elements, of which a first is connected to the impeller rear wall and a second with a arranged in the pump housing diffuser.
  • the sealing element with respect to the latter rigid element at a distance and is pressed by the pressure of the pumped by the pump liquid in a frictional engagement against a surface of the other, moving with the impeller rigid element.
  • the relevant arrangement is formed by a pump-housing-side ring, along which an impeller-side provided ring moves to form a remaining between two rings (residual) gap.
  • Both aforementioned rings are referred to in the document as sealing rings.
  • the gap remaining between these rings is deliberately dimensioned such that solid particles contained in the conveyed liquid can penetrate into this gap, but the pump-housing-side ring has at least one recess via which these solid particles flow into the adjacent liquid-flowed cavity (flow space). the pump housing, namely in the pressure range, can escape.
  • the object of the invention is to avoid the disadvantages described above.
  • the proposed to solve the problem centrifugal pump to promote solids containing, in particular contaminated with solids consists, as is generally known, of a pump housing and arranged in the pump housing on a rotatively driven shaft and thus movable, one-sided bearing impeller.
  • the pump housing has a media inlet opening and a media outlet opening. It encloses a flow space with a suction region on a front side of the impeller facing the media inlet opening and with a pressure region surrounding the circumference of the impeller.
  • a Rabeckraum is enclosed by the pump housing, which is formed on the side facing away from the media inlet opening of the impeller.
  • the gap is to the Rastatutoryraum means one with an elastic end with respect to the conveyed liquid with the solids contained therein completely sealed against the flow space on a sliding surface of the impeller along sliding sealing element.
  • a connection of Ra07raums to the pressure region of the flow space is provided, through which a ventilation and ventilation of Rastatutoryraums is given.
  • the invention is therefore based on the consideration that it is possible to completely seal the gap to Ra14raum, deviating from the known from the prior art solutions against mass transfer from the pressure range of the flow space in Ra14raum, if at the same time for ventilation and ventilation the Ra14raums and thus, in view of any resulting air or gas bubbles, for a pressure equalization to the pressure range of the flow space out care is taken.
  • a plait formation is counteracted by means of a sealing solution, which does not, as known from the prior art, only serves a driving the drive shaft for the impeller motor, oil chambers or the like before penetration promoted medium or funded liquid to protect, but completely seals the Rarierraum against a mass transfer.
  • Essential elements of such a gap seal are accordingly an at least partially elastic sealing element and a sliding surface formed on the impeller of the centrifugal pump.
  • an elastic end of the sealing element slides along the sliding surface formed on the running wheel. It lies here in a larger portion of its extension flat against the sliding surface.
  • the sealing element is fixed to a pressure lid which closes the pump housing of the centrifugal pump on the side facing away from its suction region, wherein the sliding surface is arranged on the impeller in the region of the rear gap, that is, a gap which is formed in the region of the Rastatutoryraums.
  • means for ventilation of this Ra07raums are provided by connection to the pressure range.
  • the elastic end of the sealing element is pressed against the sliding surface of the impeller. Due to the elasticity of the end of the sealing element axial and radial vibrations, which can not be avoided during operation of the pump, effectively compensated, without thereby the gap in the region of Rainerraums would be temporarily opened for a mass transfer.
  • the gap seal realized as described above is suitable both for factory equipment (original equipment) and for a corresponding retrofitting of centrifugal pumps. The possibility of retrofitting is favored in a special way by the fixation of the sealing element on the pressure lid closing the pump housing.
  • an essential element of the solution according to the invention is to be seen in that the sliding along the low-wear sliding surface of the impeller end of the sealing element is elastic.
  • Corresponding elastic properties are in particular elastomeric materials, such as polyurethane.
  • at least the aforementioned end of the sealing element made of an elastomer, such as polyurethane. It is also conceivable, however, to form the sealing element largely or even completely of an elastomer.
  • An advantageous embodiment is given in this context by the fact that the elastomeric regions of the sealing element are at least partially penetrated by a tissue. As a result, the sealing element is mechanically stabilized and increases its service life or lifetime.
  • the sealing element on the pressure cover material fit, for example by gluing or vulcanization, be attached.
  • the sealing element is fixed in force or force and form-fitting manner to the pressure lid.
  • the sealing element is formed as an elastomeric sealing ring which slides with a first axial portion on the sliding surface of the impeller and with a second, according to an advantageous development of this embodiment with respect to the diameter conically tapered axial portion of a in the Rabineraum protruding portion or paragraph of the pressure cap is raised.
  • the elastic, on the sliding surface of the impeller sliding along the end of the sealing element is formed by the aforementioned first axial portion.
  • the ventilation of the Ra07raums is given in the last described embodiment according to a first possibility in that in the pressure cover with respect to its circumference at least two positions depending behind a mounted on the pressure cover portion of the sealing element in the radial direction in the material of Pressure cover extending first bore and extending from the Ra07raum in the axial direction to the first bore second bore are formed.
  • a channel is formed by the two converged bores, via which the pressure equalization can take place, for example, during the initial filling of the centrifugal pump with liquid.
  • the sealing element is as a paragraph of the pressure cover engages behind sealing sleeve educated.
  • the sealing sleeve in the radially extending portion of the sealing sleeve, based on its circumference, at least two positions in each case a respective radial portion in the axial direction through breakthrough formed.
  • at least two openings on the side facing the pressure lid side of the radial portion of the sealing sleeve in each case at least one towering in the axial direction, consisting of the material of the sealing sleeve support or a support point is formed.
  • Preferably, even four such supports are provided with respect to the circumference of the sealing sleeve evenly spaced.
  • a planar cavity is effectively formed on the wheel back side between the surface of the radial section of the sealing collar facing the pressure lid and the pressure cover.
  • an additional cohesive fixation can be advantageously achieved in that the sealing element is adhesively bonded to the pressure lid by vulcanization.
  • a wear protection coating of the corresponding areas of the impeller can be applied, for example, by metal flame spraying.
  • it is possible in the field of Radschreib paragraphen outer edge of the impeller, that is preferably at its corresponding axial end on its radial outer surface or on a paragraph incorporated there, to press a existing of a low-wear material socket.
  • a socket for example, stainless steel, bronze or other low-wear, ie in particular abrasion resistant and corrosion resistant material.
  • the pressure lid has a larger diameter relative to the impeller, it is also possible to press a bushing on the rear side of the impeller from which a bushing connected to the bush radially projects, which consists of a corresponding low-wear material.
  • a bushing on the rear side of the impeller from which a bushing connected to the bush radially projects, which consists of a corresponding low-wear material.
  • the Fig. 1a shows a first possible embodiment of the invention with the according to the proposed solution in the gap region of the Rannenraums 6 a centrifugal pump for conveying solids containing liquids formed seal through which the respective gap 3 completely against a mass transfer is sealed.
  • the centrifugal pump consists essentially of a pump housing 1, a recorded by the pump housing 1, rotatably driven by a shaft not shown, one-sided bearing impeller 2 and the pump housing 1 on the back occluding pressure cover 12.
  • the pump housing 1 encloses a flow space through which the, containing solids to be conveyed fluid flows during operation of the pump or is moved through by the rotating impeller 2.
  • a suction 4 of this flow space opens a media inlet opening 7 for the liquid to be conveyed, which is discharged via a media outlet opening 8 in which the impeller radially surrounding pressure region 5 of the flow space.
  • the Rabeckraum 6 located on the side facing away from the intake 4 side of the impeller 2 is enclosed by the pump housing 1, which is here closed by the pressure cover 12.
  • a sealing element 9 is attached.
  • the sealing element 9 is made of an elastomer, preferably polyurethane or rubber, which may be interspersed with a tissue for stabilization.
  • the sealing element 9 By the sealing element 9, the elastic end 11 slides during operation of the pump on a trained in the Racremenite low-wear sliding surface 10 of the impeller 2, the gap 3 is completely sealed to Rareraum 6 against mass transfer. Due to the nature of the design of the sealing element and its arrangement without labyrinths, secondary gaps or the like, an accumulation of solids or impurities in the gap area is effectively prevented. Thus, it can not come to the blocking of such solids or impurities on moving parts of the seal and thereby to an unwanted opening of the gap or even clogging and thus ultimately clogging of the pump with the result of their damage.
  • the sealing element 9 is designed here as an elastomeric sealing ring.
  • This sealing ring tapers conically in an axial section 14.
  • the tapered portion 14 is the extent completely elastic sealing ring mounted on a protruding into the Rannenraum 6 section or paragraph of the pressure cover 12.
  • the sealing element 9 is non-positively fixed to the pressure cover 12 and thus possibly already reliable. Due to the fact that the axial section 14 of the sealing element 9, which is drawn onto the pressure cover 12, also conically tapers in the exemplary embodiment shown, this frictional connection is additionally supported by a positive connection.
  • the low-wear sliding surface 10 is in the embodiment shown, both from the Fig. 1a as well as from the Fig. 1b can be seen, formed by the fact that in the region of the Ramony a bush 19 is pressed onto the impeller 2, which with a rautden in the radial direction raceway 20th connected is.
  • a low-wear material such as stainless steel or bronze pressure ring 20 forms the sliding surface 10, on which the corresponding elastic end 11 of the sealing element 9 slides during operation of the pump.
  • the Fig. 2a and 2 B show another possible embodiment of the solution according to the invention with respect to its shape slightly differently shaped sealing element 9.
  • the sealing element 9 is formed here as a, a shoulder of the pressure cover 12 engages behind the elastomeric sleeve.
  • the diameter of the protruding into the Ra speciallyraum 6 end of the pressure cover 12 is greater than that of the impeller 2.
  • the diameter difference is not given in this embodiment by an appropriate design of serving to form the sliding surface 10 elements, but by a corresponding shape of the sealing element 9, balanced in the form of an elastomeric sealing sleeve.
  • the sealing collar has a section 21 extending in the radial direction r.
  • the sliding surface is embodied in a circumferential groove of shallow depth incorporated on the wheel back in the impeller 2.
  • the impeller 2 is coated either by a wear-resistant material or the sliding surface 10 is formed by pressing a wear-resistant ring in the groove.
  • Fig. 3a and 3b is again in the embodiment according to the Fig. 2a and 2 B used elastomeric sealing sleeve individually, wherein the Fig. 3b the detail Z of Fig. 3a concerns. Particularly good to recognize in the Fig. 3a the two provided at opposite circumferential positions in the sealing element 9 and in the sealing sleeve openings 17, 17 'and in their area in each case formed, towering in the axial direction supports 18, 18'. For the upper part of the in the Fig. 3a shown sealing collar, the corresponding training again by in the Fig. 3b given magnification illustrates.

Landscapes

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

Claims (15)

  1. Pompe centrifuge pour refouler des liquides contenant des particules solides, comprenant un boîtier de pompe (1) présentant une ouverture d'entrée de milieux (7) et une ouverture de sortie de milieux (8) pour le liquide respectif à refouler et une roue mobile (2) disposée dans le boîtier de pompe (1) sur un arbre entraîné en rotation, le boîtier de pompe entourant un espace d'écoulement, ayant une région d'aspiration (4) sur un côté avant de la roue mobile (2) tourné vers l'ouverture d'entrée de milieux (7) et ayant une région de pression (5) entourant la périphérie de la roue mobile (2), ainsi qu'un espace arrière de roue (6), qui est réalisé du côté de la roue mobile (2) opposé à l'ouverture d'entrée de milieux (7), une fente (3) vers l'espace arrière de roue (6), résultant de la construction, étant complètement étanchéifiée par rapport à l'espace d'écoulement au moyen d'un élément d'étanchéité (9) glissant avec une extrémité élastique (11) le long d'une surface de glissement (10) à faible usure de la roue mobile (2) vis-à-vis du liquide refoulé contenant les particules solides,
    caractérisée en ce qu'une ventilation et un désaérage de l'espace arrière de roue (6) sont toutefois réalisés par le biais d'une connexion prévue à cet effet avec la région de pression (5) de l'espace d'écoulement.
  2. Pompe centrifuge selon la revendication 1, caractérisée en ce qu'il s'agit d'une pompe à eaux usées.
  3. Pompe centrifuge selon la revendication 1 ou 2, caractérisée en ce que l'élément d'étanchéité (9) au moins en partie élastique, glissant avec son extrémité (11) le long de la surface de glissement (11) réalisée dans la région de la fente (3) vers l'espace arrière de roue (6) sur le côté de la roue mobile (2) opposé à la région d'aspiration (4) est fixé à un couvercle de pression (12) fermant le boîtier de pompe (1) sur le côté opposé à la région d'aspiration (4), l'agencement d'étanchéité réalisé de cette manière pour la fente (3) comprenant des moyens (15, 15', 16, 16', 17, 17', 18, 18') pour la ventilation et le désaérage de l'espace arrière de roue (6) par connexion à la région de pression (5).
  4. Pompe centrifuge selon la revendication 3, caractérisée en ce qu'au moins l'extrémité (11) de l'élément d'étanchéité (9) glissant le long de la surface de glissement (10) de la roue mobile (2) se compose d'un élastomère.
  5. Pompe centrifuge selon la revendication 4, caractérisée en ce que les régions de l'élément d'étanchéité (9) constituées d'un élastomère sont imprégnées au moins en partie par un tissu.
  6. Pompe centrifuge selon la revendication 4 ou 5, dans laquelle l'ensemble de l'élément d'étanchéité (9) se compose d'un élastomère, caractérisée en ce que l'élément d'étanchéité (9) est fixé par engagement par force ou par force et par correspondance de formes au couvercle de pression (12) .
  7. Pompe centrifuge selon la revendication 6, caractérisée en ce que l'élément d'étanchéité (9) est réalisé sous forme de bague d'étanchéité élastomère qui glisse avec une première portion axiale (13) constituant l'extrémité élastique (11) le long de la surface de glissement (10) de la roue mobile (2) et qui est enfilée avec une deuxième portion axiale (14) sur une portion ou un épaulement du couvercle de pression (12) pénétrant dans l'espace arrière de roue.
  8. Pompe centrifuge selon la revendication 7, caractérisée en ce que pour la ventilation et le désaérage de l'espace arrière de roue (6), à chaque fois un premier alésage (15, 15') s'étendant derrière la portion axiale (14) de l'élément d'étanchéité (9) dans la direction radiale (r) dans le matériau du couvercle de pression (12) et un deuxième alésage (16, 16') s'étendant depuis l'espace arrière de roue (6) dans la direction axiale (a) jusqu'au premier alésage (15, 15') sont réalisés dans le couvercle de pression (12) en au moins deux positions par rapport à sa périphérie.
  9. Pompe centrifuge selon la revendication 7, caractérisée en ce que pour la ventilation et le désaérage de l'espace arrière de roue (6), à chaque fois un orifice s'étendant dans la direction radiale (r) dans l'espace arrière de roue (6) est réalisé dans l'élément d'étanchéité (9) réalisé sous forme de bague d'étanchéité, en au moins deux positions par rapport à sa périphérie.
  10. Pompe centrifuge selon la revendication 6, dans laquelle une extrémité axiale du couvercle de pression (12) pénétrant dans l'espace arrière de roue (6) présente un diamètre supérieur par rapport à la roue mobile (2), caractérisée en ce que l'élément d'étanchéité (9) est réalisé sous forme de manchon d'étanchéité venant en prise par l'arrière avec un épaulement du couvercle de pression (12), qui présente une portion (21) s'étendant dans la direction radiale (r) pour compenser les différents diamètres entre le couvercle de pression (12) et la roue mobile (2).
  11. Pompe centrifuge selon la revendication 10, caractérisée en ce que pour la ventilation et le désaérage de l'espace arrière de roue (6), à chaque fois un orifice (17, 17') traversant la portion concernée (21) dans la direction axiale (a) et un appui (18, 18') constitué du matériau du manchon d'étanchéité, s'élevant sur le côté tourné vers le couvercle de pression dans la direction axiale (a), sont réalisés dans la portion (21) s'étendant dans la direction radiale (r) de l'élément d'étanchéité (9) réalisé sous forme de manchon d'étanchéité, en au moins deux positions par rapport à sa périphérie.
  12. Pompe centrifuge selon l'une quelconque des revendications 6 à 11, caractérisée en ce que l'élément d'étanchéité (9), en vue de sa fixation supplémentaire au couvercle de pression (12), est connecté de manière à adhérer à celui-ci par vulcanisation.
  13. Pompe centrifuge selon l'une quelconque des revendications 3 à 12, caractérisée en ce que la surface de glissement (10) à faible usure est réalisée par un revêtement de protection anti-usure de la roue mobile (2).
  14. Pompe centrifuge selon l'une quelconque des revendications 3 à 12, caractérisée en ce que pour réaliser la surface de glissement (10), une douille (19) est pressée sur le côté tourné vers l'espace arrière de roue (6) sur la périphérie ou sur un épaulement incorporé de la roue mobile (2), la surface de glissement (10) étant réalisée sur la surface extérieure radiale de la douille (19) constituée d'un matériau à faible usure.
  15. Pompe centrifuge selon l'une quelconque des revendications 3 à 12, dans laquelle une extrémité axiale du couvercle de pression (12) pénétrant dans l'espace arrière de roue (6) présente un diamètre supérieur à celui de la roue mobile (2), caractérisée en ce que pour réaliser la surface de glissement (10), une douille (19) est pressée sur le côté tourné vers l'espace arrière de roue (6) sur la périphérie ou sur un épaulement incorporé de la roue mobile (2), la surface de glissement (10) étant réalisée à partir d'un matériau à faible usure sur la surface extérieure radiale d'une bague de roulement (20) connectée à la douille (19), s'élevant par rapport à celle-ci dans la direction radiale (r).
EP12788429.4A 2011-10-07 2012-10-04 Pompe centrifuge pour fluide contenant des particules solides avec fermeture d'un interstice Not-in-force EP2766608B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011054320A DE102011054320A1 (de) 2011-10-07 2011-10-07 Kreiselpumpe und Anordnung zur Spaltabdichtung
PCT/DE2012/100314 WO2013050031A1 (fr) 2011-10-07 2012-10-04 Pompe centrifuge pour liquides contenant des matières solides, et fermeture étanche d'une fente

Publications (2)

Publication Number Publication Date
EP2766608A1 EP2766608A1 (fr) 2014-08-20
EP2766608B1 true EP2766608B1 (fr) 2019-04-17

Family

ID=47216000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12788429.4A Not-in-force EP2766608B1 (fr) 2011-10-07 2012-10-04 Pompe centrifuge pour fluide contenant des particules solides avec fermeture d'un interstice

Country Status (6)

Country Link
US (1) US20140255165A1 (fr)
EP (1) EP2766608B1 (fr)
CN (1) CN103857917A (fr)
DE (2) DE102011054320A1 (fr)
RU (1) RU2583482C2 (fr)
WO (1) WO2013050031A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104265678B (zh) * 2014-09-26 2017-02-15 浙江理工大学 用于叶轮和蜗壳间隙的密封机构
DE102016201969A1 (de) * 2016-02-10 2017-08-10 BSH Hausgeräte GmbH Wäschepflegegerät mit einem Dichtelement
RU169331U1 (ru) * 2016-07-19 2017-03-15 Общество с ограниченной ответственностью "ИнжиТех" Бронедиск шламового насоса с уплотнением
CN117067380B (zh) * 2023-10-11 2024-01-26 成都永益泵业股份有限公司 一种氧化铝泵过流部件及其制作方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2270054A (en) * 1939-10-13 1942-01-13 Georgia Iron Works Water seal for pumps
US2475316A (en) * 1946-12-27 1949-07-05 Curtiss Wright Corp Fluid pumping system
NL157081B (nl) * 1970-08-04 1978-06-15 Ballast Nedam Groep Nv Afdichting voor het afdichten van een spleet tussen een stationair en een roteerbaar onderdeel.
DE2051011A1 (de) 1970-10-17 1972-04-20 Loewe Pumpenfabrik Gmbh Spaltabdichtung für Kreiselpumpen und dergl
NL7800305A (nl) 1978-01-10 1979-07-12 Jan Cornelis Zwets Vuilwater-pomp.
US4227573A (en) * 1978-11-16 1980-10-14 Otis Engineering Corporation Reinforced seal unit for pumpdown pistons or well swabs
JPS5724491A (en) 1980-07-21 1982-02-09 Hitachi Ltd Sewage pump
SU1096403A1 (ru) * 1983-02-21 1984-06-07 Ярославский политехнический институт Центробежный насос
NL8402886A (nl) * 1984-09-20 1986-04-16 Ihc Holland Nv Centrifugaalpomp.
US4867633A (en) * 1988-02-18 1989-09-19 Sundstrand Corporation Centrifugal pump with hydraulic thrust balance and tandem axial seals
US4981413A (en) * 1989-04-27 1991-01-01 Ahlstrom Corporation Pump for and method of separating gas from a fluid to be pumped
DE29619742U1 (de) * 1996-11-13 1997-01-09 Grundfos A/S, Bjerringbro Kreiselpumpe mit mindestens einem einflutigen Laufrad
US5971704A (en) * 1997-04-23 1999-10-26 Toyo Pumps North America Corporation Device for adjusting the running clearance of an impeller
JP2003074491A (ja) * 2001-09-04 2003-03-12 Nsk Ltd ウォータポンプ用シール装置とウォータポンプ用回転支持装置とウォータポンプ
DE102008001814A1 (de) * 2008-05-15 2009-11-19 Würdig, Uwe Vorrichtung zur Laufradabdichtung bei Kreiselpumpen
WO2010079088A1 (fr) * 2009-01-09 2010-07-15 Sulzer Pumpen Ag Pompe centrifuge équipée d'un dispositif conçu pour l'élimination de particules
EP2348220B1 (fr) * 2009-12-30 2015-07-08 Grundfos Management A/S Pompe submersible

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
DE102011054320A1 (de) 2013-04-11
EP2766608A1 (fr) 2014-08-20
US20140255165A1 (en) 2014-09-11
DE112012004156A5 (de) 2014-06-18
RU2583482C2 (ru) 2016-05-10
RU2014117306A (ru) 2015-11-20
WO2013050031A1 (fr) 2013-04-11
CN103857917A (zh) 2014-06-11

Similar Documents

Publication Publication Date Title
EP3187736B1 (fr) Pompe centrifuge horizontale multi-etagée destinée au transport d'un fluide et son procédé de réparation
EP2304246B1 (fr) Dispositif pour l'étanchéité du rotor de pompes centrifuges
AT501757B1 (de) Radiale dichtungsvorrichtung
EP2766608B1 (fr) Pompe centrifuge pour fluide contenant des particules solides avec fermeture d'un interstice
EP1797327A1 (fr) Pompe à pistons rotatifs comportant un carter et deux pistons rotatifs à deux pales
DE10327574A1 (de) Laufrad für eine Kraftstoffpumpe
WO2015074903A1 (fr) Dispositif de décharge
EP3029333A1 (fr) Pompe a separation axiale
DE102005034341A1 (de) Tauchmotorpumpe mit Kühlmantel
EP2348220B1 (fr) Pompe submersible
DE102013104069B4 (de) Kreiselpumpe und Anordnung zur saugseitigen Radialspaltabdichtung
EP0013942B1 (fr) Pompe centrifuge pour liquides contenant des matières solides
EP2707629B1 (fr) Dispositif d'étanchéification d'une chambre de pompage d'une pompe à piston tournant, et pompe à piston tournant dotée de ce dispositif
EP3502523A1 (fr) Joint radial d'étanchéité d'arbre
DE102014116466B3 (de) Saugseitige Spaltabdichtung bei einer Kreiselpumpe
DE102008056106B4 (de) Seitenkanalgebläse, insbesondere Sekundärluftgebläse für eine Verbrennungskraftmaschine
DE2559667B2 (de) Flüssigkeitsringdichtung für strömende Medien
DE10034195C1 (de) Baggerpumpe
DE10303419B4 (de) Baueinheit mit einem ölgefüllten Gehäuse und einer durch das Gehäuse hindurchgeführten Welle
EP3339654A1 (fr) Pompe centrifuge
EP1288501B1 (fr) Capteur de pression pour pompe
DE112007002363T5 (de) Pneumatischer Flügelzellenmotor
EP3171028B1 (fr) Pompe centrifuge multicellulaire avec un piston d'équilibrage de poussée axiale dont les faces de haute et basse pression sont séparées par une garniture mécanique
DE9217976U1 (de) Umwälzpumpe
EP2568187B1 (fr) Agencement de boîtier

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: 20140507

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

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20170323

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20181108

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

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

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20190131

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

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: DE

Ref legal event code: R096

Ref document number: 502012014634

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1121851

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190515

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: NL

Ref legal event code: MP

Effective date: 20190417

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: 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: 20190417

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

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: 20190717

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: 20190817

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: 20190417

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: 20190417

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: 20190417

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: 20190417

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: 20190417

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: 20190417

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: 20190417

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: 20190417

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: 20190717

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: 20190718

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: 20190417

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: 20190817

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502012014634

Country of ref document: DE

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

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: 20190417

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: 20190417

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: 20190417

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: 20190417

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: 20190417

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

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

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: 20190417

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: 20190417

26N No opposition filed

Effective date: 20200120

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: 20190417

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: 20190417

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: 20190417

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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: 20191031

Ref country code: LU

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

Effective date: 20191004

Ref country code: LI

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

Effective date: 20191031

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20191031

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

Ref country code: BE

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

Effective date: 20191031

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20191004

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

Ref country code: FR

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

Effective date: 20191031

Ref country code: IE

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

Effective date: 20191004

Ref country code: GB

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

Effective date: 20191004

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1121851

Country of ref document: AT

Kind code of ref document: T

Effective date: 20191004

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: 20191004

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

Effective date: 20190417

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: 20121004

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: 20190417

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: 20190417

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

Ref country code: DE

Payment date: 20221026

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502012014634

Country of ref document: DE

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

Ref country code: DE

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

Effective date: 20240501