EP2978975B1 - Schlammpumpenlaufrad - Google Patents

Schlammpumpenlaufrad Download PDF

Info

Publication number
EP2978975B1
EP2978975B1 EP14774127.6A EP14774127A EP2978975B1 EP 2978975 B1 EP2978975 B1 EP 2978975B1 EP 14774127 A EP14774127 A EP 14774127A EP 2978975 B1 EP2978975 B1 EP 2978975B1
Authority
EP
European Patent Office
Prior art keywords
face
edge
side face
trailing edge
leading edge
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
EP14774127.6A
Other languages
English (en)
French (fr)
Other versions
EP2978975A1 (de
EP2978975A4 (de
Inventor
Craig Ian Walker
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.)
Weir Minerals Australia Ltd
Original Assignee
Weir Minerals Australia Ltd
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
Priority claimed from AU2013901086A external-priority patent/AU2013901086A0/en
Application filed by Weir Minerals Australia Ltd filed Critical Weir Minerals Australia Ltd
Priority to PL14774127T priority Critical patent/PL2978975T3/pl
Publication of EP2978975A1 publication Critical patent/EP2978975A1/de
Publication of EP2978975A4 publication Critical patent/EP2978975A4/de
Application granted granted Critical
Publication of EP2978975B1 publication Critical patent/EP2978975B1/de
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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2294—Rotors specially for centrifugal pumps with special measures for protection, e.g. against abrasion
    • 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
    • F04D29/24—Vanes
    • 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
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape
    • 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

  • This disclosure relates generally to impellers for centrifugal slurry pumps.
  • Slurries are usually a mixture of liquid and particulate solids, and are commonly found in the minerals processing, sand and gravel and/or dredging industry.
  • Centrifugal slurry pumps generally include a pump casing having a pumping chamber therein which may be of a volute configuration with an impeller mounted for rotation within the pumping chamber.
  • a drive shaft is operatively connected to the pump impeller for causing rotation thereof, the drive shaft entering the pump casing from one side.
  • the pump further includes a pump inlet which is typically coaxial with respect to the drive shaft and located on the opposite side of the pump casing to the drive shaft. There is also a discharge outlet typically located at a periphery of the pump casing.
  • the pump casing may be in the form of a liner which is encased within an outer pump housing.
  • the impeller typically includes a hub to which the drive shaft is operatively connected, and at least one shroud. Pumping vanes are provided on one side of the shroud with discharge passageways between adjacent pumping vanes.
  • the impeller may be of the closed type where two shrouds are provided with the pumping vanes being disposed therebetween.
  • the impeller may however be of the "open" face type which comprises one shroud only.
  • US 2010/0284812 discloses a centrifugal water pump having an impeller which has aerofoil shaped vanes with a thick base (portion in contact with back shroud) tapering to a thin tip (portion closest to the fluid inlet). Although the vanes are twisted along their length, they would not be suitable for use in slurry pumps.
  • the vanes of D2 are typical of the mixed flow type, that is the vanes are of a double curvature type.
  • the patent is concerned with a novel method to produce such a vane.
  • EP2570674 describes an erosion restraint impeller vane made of metallic laminate, the vane comprising a first metallic core material and a wear resistant material, the hardness of the wear resistant material being higher than that of the metallic core material.
  • slurry pumps handling heterogeneous slurries (with settling particles of typical size 0.5mm) it is common for there to be solids concentration gradients throughout the flows in the inlet pipe and within the impeller and pump casing.
  • concentration gradients are caused by the various forces acting on the particle including: gravity, fluid drag and centrifugal forces.
  • the slurry particles are at their highest concentration at the root of the vane on the back shroud of the impeller, that is, in the region where a side edge of the vane contacts the shroud.
  • a pump impeller which includes:
  • the configuration of the vane is such that in use the Coriolis force generated by the vane disperses particles across that vane at its trailing edge thereby reducing wear near the region where the vane abuts against the face of the back shroud.
  • the first side face at the trailing edge is in a plane which is at an obtuse angle in a range of greater than about 90° to about 135°. In certain embodiments, the first side face at the leading edge is in a plane which is at an acute angle in a range of about 45° to less than about 90°.
  • the angle of the first side face progressively changing when moving from the leading edge to the trailing edge of the vane may be in a continuous form of curvature when moving from the leading edge to the trailing edge, or in multiple straight sectors at different acute or obtuse angles to form the shape of the pumping vane.
  • the first side face is a leading face with respect to the direction of rotation, so that fluid being pumped is impacted against it.
  • each pumping vane includes a leading edge section terminating at the leading edge the leading edge section tapering inwardly towards the leading edge, and a trailing edge section terminating at the trailing edge the trailing edge section tapering inwardly towards the trailing edge, each pumping vane including a main section between the leading and trailing edge sections which has a width or thickness which is generally constant from one side edge thereof to an opposed side edge and along its length from the leading edge section to the trailing edge section.
  • the first side face is configured such that the surface thereof, at any line between the leading and trailing edges which is at 90° from one side edge to the other, is flat or linear in the direction of that line.
  • the first side face is a face of a rectangular flat strip with the leading edge and trailing edge forming two shorter sides of the rectangular flat strip and side edges forming two longer sides of the rectangular flat strip, said rectangular flat strip being twisted about an axis extending from the leading edge to the trailing edge, said rectangular flat strip also being curved between the leading edge and the trailing edge such that the first side face is backward-curved and the first side face of the rectangular flat strip is linear or flat in the direction of a line which is drawn from one side edge to the other at any point between the leading edge and the trailing edge of the first side face where the line meets each of the side edges at an angle of 90°.
  • the pumping vanes are curved in a lengthwise direction between the leading and trailing edges although in some other embodiments the impeller pumping vanes can be straight along their distal length.
  • the vanes are backwardly curved with respect to the direction of rotation of the impeller, although for some applications the direction of curvature may be forwardly curved with respect to the direction of rotation of the impeller, depending on the nature of fluid.
  • a pump impeller which includes:
  • FIG. 1 there is illustrated a typical example of a pump 10 which includes a pump casing or volute 12, a back liner 14, a front liner 30 and a pump outlet 18.
  • An internal chamber 20 is adapted to receive an impeller 40 for rotation about rotational axis X-X.
  • the front liner 30 includes a cylindrically-shaped delivery section 32 through which slurry enters the pump chamber 20.
  • the delivery section 32 has a passage 33 therein with a first, outermost end 34 operatively connectable to a feed pipe (not shown) and a second, innermost end 35 adjacent the chamber 20.
  • the front liner 30 further includes a side wall section 15 which mates in use with the pump casing 12 to form and enclose the chamber 20, the side wall section 15 having an inner face 37.
  • the second end 35 of the front liner 30 has a raised lip 38 thereat, which is arranged in a close facing relationship with the impeller 40.
  • the impeller 40 includes a hub 41 from which a plurality of circumferentially spaced pumping vanes 42 extend. An eye portion 47 extends forwardly from the hub towards the passage 33 in the front liner.
  • the impeller further includes a front shroud 50 and a back shroud 51, the vanes 42 being disposed therebetween.
  • the pumping vanes include a leading edge section 60 having a leading edge 43 and a trailing edge section 61 having a trailing edge 44.
  • the leading edge section 60 is tapered inwardly towards the leading edge 43 and the trailing edge section 61 is tapered inwardly towards the trailing edge 44.
  • the pumping vanes have a main section 63 between the leading edge section 60 and trailing edge section 61 which at any planar height above the back shroud 51 has a width or thickness 64 which is generally constant from one side edge 56 to the other side edge 57 and along its length from the leading edge section 60 to the trailing edge section 61.
  • the pumping vane 42 is generally arcuate in cross-section and includes an inner leading edge 43 and an outer trailing edge 44, opposed side edges 56, 57 and opposed first and second faces 45, 46 between the side edges 56, 57, the face 45 being a pumping or pressure side face.
  • the vanes of this type are normally referred to as backward-curving vanes when viewed with the direction of rotation.
  • the side edge 56, 57 are disposed against respective inner faces of the shrouds 50, 51.
  • the inner faces 53, 54 are generally at right angles to the central rotation axis X-X.
  • the face 45 which is a pumping or pressure side face of the pumping vane 42 is configured such that the surface thereof at any line between the leading and trailing edges 43, 44 which is at 90° from one side edge 56 to the other 57 is flat or linear in the direction of that line.
  • the face 45 may be likened to a face of a rectangular flat strip with the leading edge 43 and the trailing edge 44 forming the two shorter sides of the rectangular flat strip and the side edges 56, 57 each forming the two respective longer sides of the rectangular flat strip.
  • the rectangular flat strip is twisted about an axis that extends from the leading edge 43 to the trailing edge 44.
  • the rectangular flat strip is also curved between the leading edge 43 and the trailing edge 44 which provides that face 45 is backward-curved.
  • a face (that is face 45) of the rectangular flat strip that is twisted and curved in this way, is linear or flat in the direction of a line which is drawn from one longer side (that is side edge 56) to the other longer side (that is side edge 57) at any point between the two shorter sides (that is the leading edge 43 and the trailing edge 44) of the rectangular flat strip when the line meets each of the longer sides at an angle of 90°.
  • the first face 45 is flat or linear when viewed at any cross-section along its length from the leading edge 43 to the trailing edge 44, each cross-section being taken at rights angles to the side edges 56, 57 of the vane. Examples of such cross-sections are illustrated in Figures 3 to 5 showing cross-sections taken along the lines 1, 2, and 3 in Figure 2 . As is apparent from viewing these Figures, the first face 45 is flat or linear at these cross sections. Described in another way, it means that the first face 45 is not bowed or convex at any of the cross-sectional views in question. In the embodiment described, the second face 46 is also flat or linear when viewed at any cross section.
  • the angle of inclination Y of the side face 45 with respect to the main inner face 53 of the back shroud 51 progressively changes along the length of the vane 42 when moving from its leading edge 43 to its trailing edge 44.
  • This change in angle is clearly shown in Figures 3 to 5 .
  • the angle of inclination Y is also referred to as the leading angle of the vane with respect to the direction of rotation of the impeller in use.
  • the angle of inclination Y is an acute angle at the leading edge 43.
  • the angle is in a range from about 45° to less than 90°, more preferably the angle is in a range from about 70° to about 80°, and more preferably is about 75°.
  • the angle progressively changes and, at the position shown in Figure 4 , it is at right angles (perpendicular).
  • the angle of inclination is obtuse.
  • the angle at the trailing edge is in a range from greater than 90° up to about 135°, more preferably the angle is in a range from about 100° to about 130°, and more preferably is about 110°.
  • the Coriolis force (Arrow B in Figure 2 ), which is generated as a result of the in use rotation of the impeller in the direction of arrow A in Figure 2 , causes the particulates C in a slurry or fluid which is being conveyed by the pump impeller of the present embodiment, to disperse over the face of the vane as the particulates travel along the vane from the leading edge to the trailing edge.
  • the vane shape arrangement can assist to break up solid particle concentration gradients within the impeller where the slurry particles are at their highest concentration at the root of the vane on the back shroud of the impeller, that is, in the region where a side edge of the vane contacts the shroud. This can result in a reduction of the wear due to grooving of the impeller at that point.
  • Figures 6 , 7 , 8 and 9 illustrate an impeller according to one embodiment.
  • the same reference numerals as used to identify parts in Figures 1 , 2 , 3 , 4 and 5 are used to identify similar parts in the embodiment of Figures 6 , 7 , 8 and 9 .
  • Figures 6 and 7 depict portions of an impeller 40 from different sides looking into the discharge passageways between the vanes 42, and Figures 8 and 9 each show an impeller 40 in its entirety.
  • the angle of inclination of the side face 45 with respect to the main inner face 53 of the back shroud 51 progressively changes along the length of the vanes 42 when moving from the leading edge (now shown) to its trailing edge 44.
  • Figure 10 illustrates a modified form of the arrangement shown in Figure 2 .
  • the same reference numerals as used to identify parts in Figure 2 are used to identify similar parts in the modified form of Figure 10 .
  • the change in the angle of inclination Y along the length of the vane 42 as shown in Figure 10 is greater than the change in the angle of inclination Y along the length of the vane 42 as shown in Figure 2 .

Landscapes

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

Claims (6)

  1. Schlammpumpenlaufrad (10), das Folgendes einschließt:
    - eine vordere Abdeckung (50) und eine hintere Abdeckung (51), die jeweils eine innere Hauptfläche (54, 53) mit einer äußeren Umfangskante und einer Mittelachse (X-X) aufweisen, wobei die inneren Hauptflächen (54, 53) im Allgemeinen in rechten Winkeln zu der Mittelachse (X-X) liegen, wobei das Laufrad (10) bei Anwendung um die Mittelachse (X-X) in einer Drehungsrichtung drehbar ist,
    - eine Vielzahl von Pumpschaufeln (42), die sich von der inneren Hauptfläche der hinteren Abdeckung (53) zu der inneren Hauptfläche der vorderen Abdeckung (54) erstrecken, wobei die Pumpschaufeln (42) in einer voneinander beabstandeten Beziehung angeordnet sind und jede Pumpschaufel (42) Folgendes einschließt:
    - eine erste und eine gegenüberliegende zweite Seitenfläche (45, 46), wobei die erste Seitenfläche (45) eine Pump- oder Druckseitenfläche ist,
    - eine Vorderkante (43) in dem Bereich der Mittelachse (X-X),
    - eine Hinterkante (44) in dem Bereich der äußeren Umfangskante der vorderen und der hinteren Abdeckung (54, 53) und
    - mit einem Durchgang zwischen benachbarten Pumpschaufeln,
    dadurch gekennzeichnet, dass die erste Seitenfläche (45) an der Vorderkante (43) in einer Ebene liegt, die sich in einem spitzen Winkel in Bezug auf eine Ebene der inneren Hauptfläche der hinteren Abdeckung (53) befindet, und die erste Seitenfläche (45) an der Hinterkante (44) in einer Ebene liegt, die sich in einem stumpfen Winkel in Bezug auf die Ebene der inneren Hauptfläche der hinteren Abdeckung (53) befindet, wobei sich der Winkel der ersten Seitenfläche (45) beim Bewegen von der Vorderkante (43) zu der Hinterkante (44) fortschreitend ändert.
  2. Schlammpumpenlaufrad (10) nach Anspruch 1, wobei die erste Seitenfläche (45) an der Vorderkante (43) in einer Ebene liegt, die sich in einem spitzen Winkel befindet, der ein spitzer Winkel in einem Bereich von etwa 45° bis weniger als etwa 90 ° ist.
  3. Schlammpumpenlaufrad (10) nach Anspruch 1 oder Anspruch 2, wobei die erste Seitenfläche (45) an der Hinterkante (44) in einer Ebene liegt, die sich in einem stumpfen Winkel befindet, der ein stumpfer Winkel in einem Bereich von mehr als 90° bis etwa 135° ist.
  4. Schlammpumpenlaufrad (10) nach einem der vorhergehenden Ansprüche, wobei die erste Seitenfläche (45) eine Fläche eines rechteckigen flachen Streifens ist, wobei die Vorderkante (43) und die Hinterkante (44) zwei kürzere Seiten des rechteckigen flachen Streifens bilden und Seitenkanten (56, 57) zwei längere Seiten des rechteckigen flachen Streifens bilden, wobei der rechteckige flache Streifen um eine Achse verdreht ist, die sich von der Vorderkante (43) zu der Hinterkante (44) erstreckt, wobei der rechteckige flache Streifen ebenfalls derart zwischen der Vorderkante (43) und der Hinterkante (44) gekrümmt ist, dass die erste Seitenfläche (45) nach hinten gekrümmt ist, und die erste Seitenfläche (45) des rechteckigen flachen Streifens in der Richtung einer Linie, die von der einen Seitenkanten zu der anderen (56, 57) gezogen ist, an einem beliebigen Punkt zwischen der Vorderkante (43) und der Hinterkante (44) der ersten Seitenfläche (45), wo die Linie auf jede der Seitenkanten (56, 57) in einem Winkel von 90° trifft, linear oder flach ist.
  5. Schlammpumpenlaufrad (10) nach einem der vorhergehenden Ansprüche, wobei die Pumpschaufeln (42) in einer Längenrichtung zwischen den Vorder- und den Hinterkanten (43, 44) gekrümmt sind.
  6. Schlammpumpenlaufrad (10) nach Anspruch 5, wobei die Schaufeln (42) in Bezug auf die Drehungsrichtung des Laufrades (10) nach hinten gekrümmt sind.
EP14774127.6A 2013-03-28 2014-03-28 Schlammpumpenlaufrad Active EP2978975B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14774127T PL2978975T3 (pl) 2013-03-28 2014-03-28 Wirnik napędzany pompy szlamowej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2013901086A AU2013901086A0 (en) 2013-03-28 Slurry pump impeller
PCT/AU2014/000337 WO2014153616A1 (en) 2013-03-28 2014-03-28 Slurry pump impeller

Publications (3)

Publication Number Publication Date
EP2978975A1 EP2978975A1 (de) 2016-02-03
EP2978975A4 EP2978975A4 (de) 2016-11-09
EP2978975B1 true EP2978975B1 (de) 2019-01-02

Family

ID=51622284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14774127.6A Active EP2978975B1 (de) 2013-03-28 2014-03-28 Schlammpumpenlaufrad

Country Status (17)

Country Link
US (1) US20160040682A1 (de)
EP (1) EP2978975B1 (de)
CN (1) CN105074225B (de)
AP (1) AP2015008763A0 (de)
AU (1) AU2014245856B2 (de)
BR (1) BR112015024718A2 (de)
CA (1) CA2902759A1 (de)
CL (1) CL2015002887A1 (de)
EA (1) EA031306B1 (de)
ES (1) ES2709199T3 (de)
MX (1) MX365143B (de)
PE (1) PE20151584A1 (de)
PH (1) PH12015501912B1 (de)
PL (1) PL2978975T3 (de)
PT (1) PT2978975T (de)
TR (1) TR201901181T4 (de)
WO (1) WO2014153616A1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9599120B2 (en) * 2012-08-24 2017-03-21 Asmo Co., Ltd. Impeller for centrifugal pump and centrifugal pump of vehicle washer device
GB2542233B (en) * 2015-08-26 2018-02-07 Weir Minerals Europe Ltd Rotary parts for a slurry pump
AU201614369S (en) 2016-08-12 2016-10-27 Weir Minerals Australia Ltd Impeller
AU201614664S (en) 2016-08-25 2016-11-08 Weir Minerals Australia Ltd Pump impeller
USD810788S1 (en) 2016-08-25 2018-02-20 Weir Minerals Australia Ltd. Pump impeller
USD810789S1 (en) 2016-08-25 2018-02-20 Weir Minerals Australia Ltd. Pump impeller
CN107299910B (zh) * 2017-07-07 2019-10-18 安徽卧龙泵阀股份有限公司 一种化工离心泵叶轮装置
USD847863S1 (en) * 2017-12-20 2019-05-07 Crane Pumps & Systems, Inc. Slicer blade and striker plate assembly for a centrifugal pump
CN108561330A (zh) * 2018-06-29 2018-09-21 浙江南元泵业有限公司 离心泵叶轮
WO2020028712A1 (en) * 2018-08-01 2020-02-06 Weir Slurry Group, Inc. Inverted annular side gap arrangement for a centrifugal pump
CN213808111U (zh) * 2020-08-27 2021-07-27 芜湖美的厨卫电器制造有限公司 叶轮、水泵和热水器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100284812A1 (en) * 2009-05-08 2010-11-11 Gm Global Technology Operations, Inc. Centrifugal Fluid Pump

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640328B1 (fr) * 1988-12-09 1991-03-15 Schlumberger Cie Dowell Rotor a pales pour pompe du type centrifuge, pompe et melangeur en faisant application
US5730582A (en) * 1997-01-15 1998-03-24 Essex Turbine Ltd. Impeller for radial flow devices
IT1291432B1 (it) * 1997-03-14 1999-01-11 Co Ge S R L Girante per turbopompe con pale a profilo perfezionato
CN2412114Y (zh) * 1999-03-11 2000-12-27 王庆武 排沙水泵叶轮
ITMI20012414A1 (it) * 2001-11-15 2003-05-15 Nuovo Pignone Spa Pala per girante di compressore centrifugo a medio-alto coefficiente di flusso
US8037713B2 (en) * 2008-02-20 2011-10-18 Trane International, Inc. Centrifugal compressor assembly and method
CN201288694Y (zh) * 2008-10-07 2009-08-12 石家庄工业水泵有限公司 一种高效渣浆泵
CN101368574A (zh) * 2008-10-15 2009-02-18 许洪元 两相流泵叶轮的设计方法
EP2497956A1 (de) * 2011-03-08 2012-09-12 Egger Pumps Technology AG Freistrompumpe
EP2570674A1 (de) * 2011-09-15 2013-03-20 Sandvik Intellectual Property AB Erosionsbeständige Laufradschaufel bestehend aus einem metallischen Laminat
JP5879103B2 (ja) * 2011-11-17 2016-03-08 株式会社日立製作所 遠心式流体機械
DE102012209832B3 (de) * 2012-06-12 2013-09-12 E.G.O. Elektro-Gerätebau GmbH Pumpe und Verfahren zum Herstellen eines Impellers für eine Pumpe

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100284812A1 (en) * 2009-05-08 2010-11-11 Gm Global Technology Operations, Inc. Centrifugal Fluid Pump

Also Published As

Publication number Publication date
PH12015501912A1 (en) 2016-01-11
AU2014245856B2 (en) 2018-02-15
MX2015013549A (es) 2016-04-07
PT2978975T (pt) 2019-02-08
WO2014153616A1 (en) 2014-10-02
US20160040682A1 (en) 2016-02-11
CL2015002887A1 (es) 2016-05-20
CN105074225B (zh) 2017-02-15
PH12015501912B1 (en) 2016-01-11
EA201591520A1 (ru) 2016-01-29
EP2978975A1 (de) 2016-02-03
MX365143B (es) 2019-05-24
AP2015008763A0 (en) 2015-09-30
PE20151584A1 (es) 2015-11-18
EA031306B1 (ru) 2018-12-28
ES2709199T3 (es) 2019-04-15
EP2978975A4 (de) 2016-11-09
AU2014245856A1 (en) 2015-09-17
CA2902759A1 (en) 2014-10-02
CN105074225A (zh) 2015-11-18
PL2978975T3 (pl) 2019-06-28
BR112015024718A2 (pt) 2017-07-18
TR201901181T4 (tr) 2019-02-21

Similar Documents

Publication Publication Date Title
EP2978975B1 (de) Schlammpumpenlaufrad
EP3009685B1 (de) Verbesserungen an kreiselpumpenlaufrädern
AU2015318812B2 (en) Slurry pump impeller
AU2013202462B2 (en) Improvements relating to centrifugal pump impellers
CA2558869C (en) Improved velocity profile impeller vane
CA2839472C (en) Improvements to pumps and components therefor

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: 20151028

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

A4 Supplementary search report drawn up and despatched

Effective date: 20161011

RIC1 Information provided on ipc code assigned before grant

Ipc: F04D 29/24 20060101AFI20161005BHEP

Ipc: F04D 7/04 20060101ALI20161005BHEP

Ipc: F04D 29/22 20060101ALI20161005BHEP

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: 20180403

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: 20180713

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

AX Request for extension of the european patent

Extension state: BA ME

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 1084734

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190115

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602014039181

Country of ref document: DE

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Ref document number: 2978975

Country of ref document: PT

Date of ref document: 20190208

Kind code of ref document: T

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 20190201

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2709199

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20190415

REG Reference to a national code

Ref country code: GR

Ref legal event code: EP

Ref document number: 20190400359

Country of ref document: GR

Effective date: 20190422

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

Ref country code: DE

Payment date: 20190308

Year of fee payment: 6

Ref country code: FI

Payment date: 20190319

Year of fee payment: 6

Ref country code: GB

Payment date: 20190304

Year of fee payment: 6

Ref country code: FR

Payment date: 20190312

Year of fee payment: 6

Ref country code: IE

Payment date: 20190116

Year of fee payment: 6

Ref country code: BG

Payment date: 20190320

Year of fee payment: 6

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

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

Ref country code: NL

Payment date: 20190314

Year of fee payment: 6

Ref country code: BE

Payment date: 20190307

Year of fee payment: 6

Ref country code: SE

Payment date: 20190318

Year of fee payment: 6

Ref country code: GR

Payment date: 20190319

Year of fee payment: 6

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1084734

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190102

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

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: 20190102

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: 20190402

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

Ref country code: PT

Payment date: 20190325

Year of fee payment: 6

Ref country code: IT

Payment date: 20190426

Year of fee payment: 6

Ref country code: ES

Payment date: 20190424

Year of fee payment: 6

Ref country code: PL

Payment date: 20190322

Year of fee payment: 6

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: 20190502

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: 20190102

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: 20190102

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: 20190102

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602014039181

Country of ref document: DE

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: 20190102

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: 20190102

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: 20190102

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: 20190102

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: 20190102

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: 20190102

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: 20190102

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: 20190102

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

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: 20190102

Ref country code: LU

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

Effective date: 20190328

26N No opposition filed

Effective date: 20191003

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: 20190331

Ref country code: LI

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

Effective date: 20190331

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: 20190102

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 NON-PAYMENT OF DUE FEES

Effective date: 20190328

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602014039181

Country of ref document: DE

REG Reference to a national code

Ref country code: FI

Ref legal event code: MAE

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

Ref country code: FI

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

Effective date: 20200328

Ref country code: PT

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

Effective date: 20200928

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20200401

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200331

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 NON-PAYMENT OF DUE FEES

Effective date: 20200401

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

Ref country code: BG

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

Effective date: 20201130

Ref country code: FR

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

Effective date: 20200331

Ref country code: DE

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

Effective date: 20201001

Ref country code: GR

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

Effective date: 20201008

Ref country code: SE

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

Effective date: 20200329

Ref country code: IE

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

Effective date: 20200328

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: 20200331

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

Effective date: 20200328

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

Ref country code: GB

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

Effective date: 20200328

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: 20190102

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: 20140328

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20210813

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 NON-PAYMENT OF DUE FEES

Effective date: 20200328

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

Ref country code: ES

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

Effective date: 20200329

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: 20190102

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 NON-PAYMENT OF DUE FEES

Effective date: 20200328

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

Ref country code: TR

Payment date: 20240308

Year of fee payment: 11