EP3853480A1 - Ensemble formant pompe - Google Patents

Ensemble formant pompe

Info

Publication number
EP3853480A1
EP3853480A1 EP19768796.5A EP19768796A EP3853480A1 EP 3853480 A1 EP3853480 A1 EP 3853480A1 EP 19768796 A EP19768796 A EP 19768796A EP 3853480 A1 EP3853480 A1 EP 3853480A1
Authority
EP
European Patent Office
Prior art keywords
impeller
pump arrangement
leg
rotation
inlet opening
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.)
Pending
Application number
EP19768796.5A
Other languages
German (de)
English (en)
Inventor
Matthias Bucher
Sebastian Seidel
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.)
KSB SE and Co KGaA
Original Assignee
KSB SE and Co KGaA
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 KSB SE and Co KGaA filed Critical KSB SE and Co KGaA
Publication of EP3853480A1 publication Critical patent/EP3853480A1/fr
Pending legal-status Critical Current

Links

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
    • F04D29/18—Rotors
    • F04D29/20—Mounting rotors on shafts
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2238—Special flow patterns
    • F04D29/225—Channel wheels, e.g. one blade or one flow channel
    • 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
    • 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
    • F04D7/045—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 with means for comminuting, mixing stirring or otherwise treating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/11—Kind or type liquid, i.e. incompressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/303—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the leading edge of a rotor blade

Definitions

  • the invention relates to a pump arrangement with an inlet opening for sucking in a conveying medium into a flow chamber, an outlet opening for expelling the conveying medium from the flow chamber, an impeller shaft which can be rotated about an axis of rotation and extends into the flow chamber, and an end of the impeller shaft which is located within the flow chamber Impeller which is designed as a channel wheel with a cover disk forming a suction mouth, a support disk with a hub area and at least one blade arranged between the cover disk and the support disk.
  • Sewer wheels in particular closed sewer wheels, are characterized by particularly good hydraulic efficiency, but depending on the size, they are not or only partially suitable for raw sewage.
  • the risk of clogging of such a pump arrangement increases due to a reduction in the wastewater resulting from general water savings and, at the same time, an increasing enrichment of the wastewater with constituents that tend to become clogged, such as rags, nonwovens or the like.
  • ever larger amounts of solid build up which cause an increase in power consumption, a drop in the head and flow rate and an increase in vibrations.
  • the solids accumulate at the blade leading edges or the hub and have a very stable position there.
  • the object of the invention is to provide a pump arrangement for the conveyance of waste water, which is characterized by particularly good hydraulic efficiencies.
  • the object of the invention is achieved in that a wiping finger of a solid wiping device extends in the axial direction through the inlet opening and the suction mouth up to close to the hub area of the impeller.
  • the solid wiping device has a fastening flange for fastening the solid wiping device to the pump arrangement.
  • the fastening flange has a region which has a first recess in the axial direction and a second recess in the radial direction.
  • An embodiment has proven to be particularly advantageous according to which the wiping finger which can be replaced in the first and second recesses has an essentially L-shaped design with a short leg and a long leg.
  • the side of the leg facing away from the axis of rotation advantageously points along one a contour course that extends essentially into the suction mouth of the impeller, which matches the contours of the inner diameter of the inlet opening and the inner diameter of the suction mouth of the impeller is adjusted.
  • the side of the leg that faces away from the axis of rotation along a section that extends essentially up to the hub region of the impeller advantageously has a contour course that is in line with the contour
  • the leading edge of the at least one blade of the impeller corresponds to a defined distance when the leading edge moves along the section due to the rotation of the impeller.
  • the leading edge forms a kind of rotating body that rotates over the scraper finger.
  • the side of the leg facing away from the inlet opening advantageously has a contour which corresponds to the contour of the hub region and part of the screw head of a screw for fastening the impeller corresponds to the impeller shaft while maintaining a defined distance.
  • the side of the leg facing away from the inlet opening has a contour along a section which extends essentially in the radial direction over the axis of rotation and which is adapted to the contour of the screw head of the screw while maintaining a defined distance.
  • a projection is provided on a free end of the leg, which is arranged concentrically to the axis of rotation and extends into a recess in the screw head.
  • the projection has a circular cylindrical shape. If, during operation, solids in the wiping process lead to a strong bending load on the wiping finger, the deflecting finger is supported over the projection in a recess in the screw head, which prevents permanent bending of the leg.
  • FIG. 1 shows the longitudinal section through a pump arrangement with a solid wiping device according to the invention
  • FIG. 2 shows a detailed section from FIG. 1
  • FIG. 3a shows a section through a mounting flange of the solid wiping device according to FIG. 1,
  • FIG. 4 shows a longitudinal section through a wiping finger of the solid wiping device according to FIG. 1,
  • FIG. 5 is a plan view of the free end of the wiping finger according to FIG. 4,
  • FIG. 6 shows the longitudinal section through the pump arrangement shown in FIG. 1 with a further embodiment of the solid wiping device according to the invention
  • FIG. 7 shows the longitudinal section through the pump arrangement shown in FIG. 1 with a further embodiment of the solid wiping device according to the invention.
  • FIG. 8 shows a further embodiment of the solid wiping device according to the invention.
  • FIG. 1 in conjunction with FIG. 2 shows a pump arrangement 1 that can usually be set up horizontally in a pump sump in the form of a canned motor pump with a pump part and an electrical part.
  • the pump part of the pump arrangement 1 has a multi-part pump housing 2 of a centrifugal pump, which comprises a hydraulic housing 3 designed as a spiral housing and a housing cover 4.
  • the hydraulic housing 3 has an inlet opening 5 for sucking in a delivery medium into a flow chamber 6 and an outlet opening 7 for ejecting the delivery medium out of the flow chamber 6.
  • a recess 8 is provided in the inlet opening 5, in which a split ring 9 is received.
  • the housing cover 4 is arranged on the side of the hydraulic housing 3 opposite the inlet opening 5 and has a through opening 10.
  • a bearing support unit 11 is arranged, which is fastened to the hydraulic housing 3 by suitable means, but not shown, for example threaded bolts or screws.
  • a housing element 12 is fastened, in which the major part of the motor components, e.g. Devices for receiving the stator windings and devices for receiving the rotor windings is arranged.
  • the bearing support unit 1 1 has a through opening 13 in which a roller bearing 14 is arranged.
  • the housing element 12 has an inner wall 15 with a holding device 16.
  • Another roller bearing 17 is arranged in the holding device 16. With the two roller bearings 14 and 17, an impeller shaft 18 rotatable about an axis of rotation A is supported, which extends through the housing element 12, the through opening 13 of the bearing support unit 11 and the through opening 10 of the housing cover 4 into the flow chamber 6.
  • An impeller 20 in the form of a closed channel impeller is fastened to an end 19 of the impeller shaft 18 located within the flow chamber 6.
  • the impeller 20 comprises a support disk 21 on the side facing the housing cover 4.
  • a cover disk 22 is arranged at a distance from the support disk 21 in the direction of the inlet opening 5 by means of at least one impeller blade 23.
  • the cover disk 22 forms a circular suction mouth 24 facing the inlet opening 5, in particular the split ring 9.
  • the at least one impeller blade 23 has an entry edge 25. 1 shows two impeller blades 23, depending on the size, for example, 3 or more impeller blades can also be provided.
  • the end 19 of the impeller shaft 18 is conical and tapers in the direction of the inlet opening 5.
  • the support disk 21 of the impeller 20 is provided with a hub region 26 which has a conically shaped bore 27 corresponding to the end 19.
  • the bore 27 has a cylindrical section 28 with a reduced inside diameter, which can serve as a stop shoulder when the impeller 20 is pushed onto the impeller shaft 18.
  • a threaded bore 29 is provided on the end face, into which a screw 30 can be screwed and the impeller 20 securely on the impeller shaft
  • the screw 30 has a screw head 31.
  • the screw head 31 abuts the section 28 with a reduced inner diameter and is provided with a recess 32 which, in the exemplary embodiment shown, is designed as an internal hexagon, by means of which the screw 30 can be screwed into or out of the threaded bore 29 using a suitable tool.
  • the section 28 is provided with an internal thread 33, which is not in operative connection with the screw 30, but is provided for a pulling tool, not shown, for releasing the impeller 20 from the impeller shaft 18.
  • the hydraulic housing 3 has a flange 34 on which a fixed stripping device 35 is arranged.
  • the solid wiping device 35 has a fastening flange 36 which can be attached to the flange 34.
  • FIG. 3a and 3b show the mounting flange 36 in a detailed representation, with FIG. 3a showing a section along the line B-B from FIG. 3b.
  • the fastening flange 36 is designed as an annular disk and has a plurality of through holes 37 through which screws, not shown, can be passed.
  • the screws are in threaded holes, not shown, in the flange 34 of the hydraulic raulikgeophuses 3 screwed, whereby the mounting flange 36 can be securely attached to the hydraulic housing 3.
  • the fastening flange 36 has a region 38 which has a first recess 39 in the axial direction and a second recess 40 in the radial direction.
  • at least one blind hole 41 is provided, which has an internal thread
  • the solid wiping device 35 has a wiping finger 43 which can be attached to the fastening flange 36 and is shown in more detail in FIGS. 4 and 5.
  • the stripping finger 43 has an essentially L-shaped design with a short leg 44 and a long leg 45. As can be seen from FIG. 2, in the installed state, the short leg 44 extends essentially in a radial direction, while the long leg 45 extends essentially parallel to the axis of rotation A.
  • the short leg 44 of the wiping finger 43 has, as shown in detail in FIG. 4, at least one through hole 46 with a first section 47 with an enlarged inside diameter and a second section 48 with a reduced inside diameter, whereby a shoulder 49 is formed.
  • the short leg 44 has three through holes 46.
  • the screws 50 shown in FIG. 2 can be passed through the through holes 46.
  • the screws 50 can be screwed into the internal thread 42 formed in the fastening flange 36, the screw heads abutting the shoulder 49, as a result of which the wiping finger
  • the long leg 45 is essentially divided into five sections 51, 52, 53, 54 and 55.
  • the section 51 extends essentially from the intersection of the two legs 44 and 45 in the axial direction through the fastening flange 36 shown in FIGS. 1 and 2.
  • This is followed by the section 52, which extends essentially into the suction mouth, in particular to the transition from the cover disk 22 to the at least one impeller blade 23.
  • Section 51 and section 52 extend essentially parallel to the axis of rotation A.
  • the section 53 adjoins the section 52 and then essentially extends up to the hub region 26 of the impeller 20.
  • the section 53 expands in the axial direction and approaches the axis of rotation A in the process on.
  • the extent in the axial direction along the axis of rotation is preferably greater than the extent in the radial direction, that is to say in the direction of the axis of rotation, and depending on the design of the impeller 20.
  • the section 53 Close to the hub region, the section 53 has a convex shape. A small distance is maintained in such a way that the rotating hub region 26 does not come into contact with the fixed scraper finger 43.
  • the section 54 adjoining the section 53 initially extends in the direction of the inlet opening 5 and then in the direction of the axis of rotation A. It is arcuate, in particular concave.
  • the section 55 then extends essentially in the radial direction beyond the axis of rotation A.
  • the side of the leg 45 facing away from the axis of rotation A has, along the section 52, a contour course 56 which is adapted to the contours of the inner diameter of the inlet opening 5 and the split ring 9 in the hydraulic housing 3 and of the inner diameter of the suction mouth 24 of the impeller 20.
  • a small distance W shown in FIG. 2, is provided between the opposite surfaces of the rotating component, in particular in the suction mouth 24, and the fixed scraper finger 43, such that the opposite surfaces do not touch during operation.
  • the side of the leg 45 facing away from the axis of rotation A along the section 53 has a contour course 57 which corresponds to the contour of the leading edge 25 of the at least one blade 23 of the impeller 20 while maintaining a defined distance X shown in FIG. 2 corresponds when the leading edge 25 moves along the section 53 due to the rotation of the impeller 20.
  • the selected distance X is in a range from 0.1 mm to 0.6 mm and preferably at a distance of 0.3 mm.
  • the side of the leg 45 facing away from the inlet opening 5 has a contour course 58 which corresponds to the contour of the hub region 26 and a part of the screw head 31 of the screw 30 while maintaining a defined distance Y shown in FIG. 2 .
  • the side of the leg 45 facing away from the inlet opening 5 has, along the section 55, a contour course 59 which is adapted to the contour of the screw head 31 of the screw 30 while maintaining a defined distance Z shown in FIG. 2.
  • a projection 61 is provided on a free end 60 of leg 45.
  • the projection 61 has, as can be seen in FIG. 5, a circular cylindrical shape.
  • the projection 61 is arranged concentrically to the axis of rotation A in the installed state.
  • the protrusion 61 extends into the recess 32 of the screw head 31. If, during operation, solids during the stripping process lead to a strong bending load on the stripping finger 43, the deflecting finger 43 is supported on the protrusion 61 in the recess 32, as a result of which the Thigh 45 is prevented.
  • the screw 30 has a screw head 31 with an external hexagon 62.
  • the recess 32 is designed as a circular cylindrical blind hole.
  • the contour profile in the sections 54 and 55 of the scraper finger 43 is accordingly adapted to the contour of the screw head 30.
  • the side opposite section 53 of wiping finger 43 is essentially designed as a straight line 63.
  • FIGS. 1 to 7 shows a further embodiment of the solid wiping device 35.
  • the fastening flange 36 and wiping finger 43 are formed in one piece. It goes without saying that the stripping finger 43 shown in FIGS. 1 to 7 can be formed in one piece with the fastening flange 36.

Landscapes

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

Abstract

L'invention concerne un ensemble formant pompe comprenant une ouverture d'entrée (5) destinée à aspirer un milieu de transport jusque dans une chambre d'écoulement (6), une ouverture de sortie (7) destinée à évacuer le milieu de transport de la chambre d'écoulement (6), un arbre de roue à aubes (18) pouvant tourner sur un axe de rotation (A) et s'étendant jusque dans la chambre d'écoulement (6), et une roue à aubes fixée à une extrémité (19) de l'arbre de roue à aubes (18,) située à l'intérieur de la chambre d'écoulement (6), et conçue comme une roue à canal pourvue d'un disque de recouvrement (22) formant une bouche d'aspiration (24), d'un disque de support (21) pourvu d'une région formant moyeu (26) et d'au moins une aube (23) disposée entre le disque de recouvrement (22) et le disque de support (21). Selon l'invention un doigt de raclage (43) d'un dispositif de raclage de solides (35) s'étend dans la direction axiale à travers l'ouverture d'entrée (5) et la bouche d'aspiration (24) à peu près jusqu'à la région formant moyeu (26) de la roue à aubes (20).
EP19768796.5A 2018-09-20 2019-09-12 Ensemble formant pompe Pending EP3853480A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018216048.1A DE102018216048A1 (de) 2018-09-20 2018-09-20 Pumpenanordnung
PCT/EP2019/074355 WO2020058081A1 (fr) 2018-09-20 2019-09-12 Ensemble formant pompe

Publications (1)

Publication Number Publication Date
EP3853480A1 true EP3853480A1 (fr) 2021-07-28

Family

ID=67953798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19768796.5A Pending EP3853480A1 (fr) 2018-09-20 2019-09-12 Ensemble formant pompe

Country Status (5)

Country Link
EP (1) EP3853480A1 (fr)
KR (1) KR20210063333A (fr)
CN (1) CN112703319B (fr)
DE (1) DE102018216048A1 (fr)
WO (1) WO2020058081A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117859008A (zh) * 2021-06-25 2024-04-09 伟尔矿物澳大利亚私人有限公司 具有锥形护罩的离心泵叶轮

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB812371A (en) * 1955-03-23 1959-04-22 Parkinson Cowan Appliances Ltd Improvements relating to centrifugal pumps
DE240859C (de) * 1911-04-14 1911-11-18 Kreiselpumpe für fördergut mit festen bestandteilen
US1182439A (en) * 1915-09-10 1916-05-09 Albert B Wood Centrifugal pump.
US1909052A (en) * 1929-05-01 1933-05-16 Froisland Amundur Pump for the conveyance of thick fluid pulps
US3096718A (en) * 1961-12-12 1963-07-09 Conard Kenner Trash cutter for a pump
JPS5357507A (en) * 1976-11-04 1978-05-24 Kubota Ltd Cutter underwater pumps
GB1551918A (en) * 1977-02-09 1979-09-05 Chittenden J B Pump and macerator and pump assembly
SE524048C2 (sv) * 2002-04-26 2004-06-22 Itt Mfg Enterprises Inc Anordning vid pump
CN201228641Y (zh) * 2008-07-28 2009-04-29 宜兴市丁山耐腐蚀泵厂 高效型耐腐蚀离心泵
DE102009021659B4 (de) * 2009-05-16 2011-06-01 Brinkmann Pumpen K.H. Brinkmann Gmbh & Co. Kg Pumpe
RU2688066C2 (ru) * 2014-04-23 2019-05-17 Зульцер Мэнэджмент Аг Рабочее колесо для центробежного насоса, центробежный насос, а также его использование
CN204003487U (zh) * 2014-07-30 2014-12-10 天津中蓝泵业有限责任公司 一种切割污水泵

Also Published As

Publication number Publication date
CN112703319B (zh) 2023-11-10
KR20210063333A (ko) 2021-06-01
DE102018216048A1 (de) 2020-03-26
CN112703319A (zh) 2021-04-23
WO2020058081A1 (fr) 2020-03-26

Similar Documents

Publication Publication Date Title
EP2929191B1 (fr) Pompe centrifuge, en particulier pour eaux usées ou eaux grasses
DE602004006301T2 (de) Zentrifugalpumpe
DE102016209312A1 (de) Elektrische kreiselpumpe
EP2888484B1 (fr) Pompe de transport d'eaux usées ainsi que roue et plaque de fond pour celle-ci
EP2188532B1 (fr) Roue à aubes de pompe et pompe comprenant une telle roue à aubes de pompe
EP3779201B1 (fr) Élément de raclage pour bords d'attaque de roue à aubes pour des pompes à eau
DE10012181A1 (de) Kreiselpumpe mit Noppen-Laufrad und Noppen-Laufrad hierfür
EP2643596B1 (fr) Pompe auto-nettoyante à rouet centrifuge hélicoïdal avec écoulement auxiliaire de rinçage derrière le rouet
EP2348220B1 (fr) Pompe submersible
EP3853480A1 (fr) Ensemble formant pompe
EP2520806B1 (fr) Groupe motopompe
DE102016209311A1 (de) Elektrische kreiselpumpe
EP1300594B1 (fr) Pompe centrifuge pour des eaux usées
EP2138723B1 (fr) Pompe centrifuge dotée d'un rotor de courant libre
DE102008056106B4 (de) Seitenkanalgebläse, insbesondere Sekundärluftgebläse für eine Verbrennungskraftmaschine
EP3559475B1 (fr) Pompe non colmatable
WO2017021117A1 (fr) Pompe volumétrique pour refouler un liquide pour un consommateur d'un véhicule à moteur
CH717512A1 (de) Laufrad für eine Kreiselpumpe.
LU102840B1 (de) Schneidring für mit Feststoff belastete Flüssigkeit einer Pumpe
DE10019820C2 (de) Pumpe, insbesondere Umwälzpumpe für Haushaltsmaschinen wie Geschirrspülmaschinen
DE102011077545A1 (de) Kreiselpumpe mit integriertem Schneidwerk
DE19607292C2 (de) Gehäuse mit Leitapparat für eine Pumpenstufe einer mehrstufigen Kreiselpumpe
DE102019124590A1 (de) Kreiselpumpe und Verfahren zum Einstellen eines Axialspalts
DE102013218410B4 (de) Zentrifugalpumpe
DE102021105727A1 (de) Kreiselpumpe mit Einlaufrippen

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

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

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

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

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20210222

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

DAV Request for validation of the european patent (deleted)
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: 20230222