EP3779201A1 - Élément de raclage pour bords d'attaque de roue à aubes pour des pompes à eau - Google Patents

Élément de raclage pour bords d'attaque de roue à aubes pour des pompes à eau Download PDF

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Publication number
EP3779201A1
EP3779201A1 EP19191970.3A EP19191970A EP3779201A1 EP 3779201 A1 EP3779201 A1 EP 3779201A1 EP 19191970 A EP19191970 A EP 19191970A EP 3779201 A1 EP3779201 A1 EP 3779201A1
Authority
EP
European Patent Office
Prior art keywords
finger
rotation
angle
impeller
axis
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.)
Granted
Application number
EP19191970.3A
Other languages
German (de)
English (en)
Other versions
EP3779201C0 (fr
EP3779201B1 (fr
Inventor
Christoph Jäger
Mateusz Kaminski
Enrico MÜLLER
Nicolas Petit
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
Priority to HUE19191970A priority Critical patent/HUE062508T2/hu
Application filed by KSB SE and Co KGaA filed Critical KSB SE and Co KGaA
Priority to EP19191970.3A priority patent/EP3779201B1/fr
Priority to AU2020327570A priority patent/AU2020327570A1/en
Priority to BR112022002294A priority patent/BR112022002294A2/pt
Priority to CN202080057382.5A priority patent/CN114245849A/zh
Priority to PCT/EP2020/071792 priority patent/WO2021028246A1/fr
Priority to US17/635,236 priority patent/US20220290695A1/en
Priority to CA3149426A priority patent/CA3149426A1/fr
Publication of EP3779201A1 publication Critical patent/EP3779201A1/fr
Application granted granted Critical
Publication of EP3779201C0 publication Critical patent/EP3779201C0/fr
Publication of EP3779201B1 publication Critical patent/EP3779201B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially 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
    • 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
    • F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
    • 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

Definitions

  • the invention relates to a sewage pump with a spiral housing with an inlet opening and an impeller with at least one blade, the leading edge associated with the respective blade extending outwardly curved backwards from the impeller hub.
  • Wastewater can contain various types of solids such as fiber, the amount and structure of which can depend on the source of the wastewater and the time of year. For example, plastics, hygiene articles, textiles, etc. are common in cities, while wear particles can be contained in industrial areas.
  • fibrous materials such as rags, cloths and the like, which stick to the leading edges of the blades and can wrap around the impeller hub. Such incidents lead to frequent service intervals and a reduced efficiency of the pump.
  • the present invention aims to improve existing solutions.
  • the starting point for the invention is a sewage pump for pumping solid-laden sewage.
  • the sewage pump consists of an impeller with at least one backward-curved impeller blade.
  • the impeller is non-rotatably connected to a rotating shaft and sits in a spiral pump housing with an inlet opening.
  • the inlet opening can be axially aligned and / or cylindrical.
  • the leading edge of the at least one impeller blade extends radially outward from the impeller hub with the aforementioned backward curved blade shape.
  • a finger is firmly connected to the pump housing on the inner wall of the inlet opening. In the area of the transition of the finger to the inner wall of the inlet opening, there is a groove which is formed in the suction side wall of the pump housing and runs outward in the pump housing wall in the radial and tangential directions.
  • the finger extends radially inward from the inlet inner wall toward the axis of rotation of the impeller.
  • An upper finger surface facing the leading edge runs at a defined distance from the leading edge and essentially parallel to the leading edge, so that the desired wiping effect results from the upper finger surface facing the leading edge or the lateral contact surface of the finger.
  • the interaction of the backward curved leading edge and the finger favors the removal of solids stuck on the leading edge of the impeller.
  • the deposited solids are fed into the groove and conveyed by the rotational movement of the impeller, so that they reach the area of the housing pressure connection via the groove.
  • the impeller and the finger are specially designed for this task.
  • the impeller leading edge is set at an angle ⁇ of 5 ° to 75 ° to the vertical projection surface of the axis of rotation of the impeller is. This has the effect that in addition to the rotational movement and the resulting radial force, an axial component on the solids also comes into play in order to wipe off the solids. This optimizes the removal of the stripped solids through the groove.
  • the angle ⁇ can preferably be in a value range between 10 ° to 45 °.
  • the upper finger surface of the finger can also be inclined to the same extent by the angle ⁇ with respect to the vertical projection surface.
  • the upper finger surface and the leading edge do not necessarily have to run exactly parallel, so that different angles ⁇ to the projection surface are also conceivable here.
  • the upper finger surface is not made planar, but instead is curved, so that a varying angle ⁇ for the finger surface and consequently also a varying distance between the leading edge and the upper finger surface can result here.
  • the upper finger surface can preferably provide a curvature both in the radial and in the tangential direction. Ideally, the upper finger surface has a cone-like curvature in the radial and tangential directions.
  • the sewage pump can be operated dry or submerged in the pumping medium in any orientation.
  • the volute casing of the pump has a spur and a pressure port.
  • the pump housing can have a separate housing insert, such as a suction cover or a wear wall, into which the aforementioned groove can be introduced or the finger can be attached to it.
  • the leading edge of the at least one blade moves past the upper finger surface at an angle ⁇ to the lateral contact surface of the finger.
  • this angle ⁇ should be around 90 ° in order to achieve an optimal wiping effect.
  • the angle ⁇ should increase outwards in the radial direction. This means that as the radius increases (starting from the impeller hub), the angle ⁇ should also increase.
  • the radius r suction corresponds to the radius of the cylindrical inlet opening of the housing.
  • the angle can vary essentially uniformly between the aforementioned support points; ideally, the angle between the support points should increase steadily.
  • the upper finger surface of the finger has a distance of 0.05 to 3 mm from the leading edge of the blade, at least in some areas. This ensures that the solids are optimally stripped off the impeller leading edge. If the distance chosen is too large, there is a risk that small solids and fibers will not be caught by the scraper finger.
  • the lateral contact surface of the finger or a tangent to the contact surface in relation to the tangential course of the groove should have a (tangential) angle ⁇ with a value between 120 ° and 180 °, preferably between 140 ° and 180 ° and particularly preferably a value between 160 ° and 180 °. It applies here that the removal of the stripped solids into the groove is facilitated as the angle ⁇ increases. An angle ⁇ of 180 ° would be ideal.
  • the finger In order to influence the flow in the inlet of the impeller as little as possible, the finger should have a flow-favorable shape. Good properties are achieved if the finger is designed as a three-surface pyramid with curved side surfaces. To ensure a sufficient scraping function and, if necessary, to achieve an optional cutting effect, it is advantageous if the front surface, ie the contact surface of the finger, is set at an angle ⁇ of 0 ° to 30 ° with respect to a parallel line to the axis of rotation of the impeller.
  • the back surface of the finger is less critical and, if necessary, can also be more inclined to the parallel. An angle ⁇ of the back surface of the finger to the parallel lines of the axis of rotation of the impeller between 0 ° and 50 ° is recommended here.
  • the rear surface is designed to be doubly curved, in particular designed to be doubly curved in different directions. This also reduces the area of the finger that influences the flow.
  • the orientation and the specific arrangement of the finger within the inlet are decisive for the efficiency of the wiping action.
  • the relative position of the finger to the spur of the spiral housing and consequently to the pressure port is relevant. It is advantageous if the finger is arranged in the vicinity of the spur, preferably after the spur in the direction of rotation. Such an arrangement has a further advantage, particularly in the case of horizontally standing pumps. Solids such as stones can possibly collect in the lower part of the pump housing or impeller. By arranging the finger 30 in the vicinity of the spur, the latter is positioned outside this danger point.
  • the exact position of the finger can be set using the angle, for example.
  • the angle ⁇ corresponds to the wrap angle defined by the angle of intersection between the vertical and a tangent of the contact surface of the finger that intersects the axis of rotation of the impeller, the tangent preferably running through the point of the contact surface which is farthest away from the axis of rotation in the radial direction.
  • Possible angular values of the angle ⁇ are 0 ° to 45 °, preferably between 15 ° to 35 ° and ideally between 20 ° and 30 °.
  • the selected finger length corresponds to at least 30% of the total radius r suction of the cylindrical inlet opening, preferably at least 50% and ideally between 70% to 80%.
  • the finger can also be made for the finger to provide at least one section designed as a cutting edge, in particular on the side of the front contact surface of the finger, the cutting edge however extending perpendicular to the stripping edge, ie parallel to the axis of rotation.
  • the cutting edge is preferably provided in the transition area of the finger to the fastening element of the finger.
  • Figure 1 shows an exploded view of the wastewater pump 1 according to the invention. It consists of a spiral housing 10, a suction-side housing insert in the form of a sliding wall 12 and the impeller 20 rotating about the axis of rotation R. The direction of travel is identified by the reference number 2.
  • the impeller 20, in a detailed view of Figure 4 includes two backward curved blades 21a, 21b, through which the conveying medium is sucked in via the cylindrical inlet opening 15 of the wear wall 12 and conveyed via the conveying chamber 16 of the spiral housing 10 to the pressure connection 13 and discharged via this.
  • the wastewater to be pumped can be mixed with a large number of different solids, for example fibrous materials that can stick to certain parts of the pump during operation of the pump.
  • the scraper finger 30 according to the invention is provided, which is fastened to the cylindrical inner wall of the inlet 15 and extends in the direction of the axis of rotation R.
  • the embodiment shown in the figures has a separate wear wall 12, but for the implementation of the invention the wear wall 12 could just as easily be dispensed with and the finger 30 attached directly to the housing wall in the area of the suction mouth.
  • the design and functioning of the finger 30 will be discussed in greater detail later; first, the construction of the impeller 20 will be described.
  • Characteristic for the impeller 20 is the course of the in Fig. 4 shown leading edges 23 of the blades 21a, 21b. These begin directly at the impeller hub 22, in particular at the level of the upper, free end of the hub and extend radially outward, curved backwards. The end faces of the blades 21a, 21b which are directed towards the suction cover and extend through the inlet 15 are referred to as inlet edges 23.
  • leading edges 23 are also aligned at a defined angle ⁇ to the perpendicular projection surface of the axis of rotation R.
  • ⁇ is drawn in here the leading edge 23 of the impeller 20 with respect to the horizontal, which corresponds to a projection surface perpendicular to the axis of rotation R in the selected form of representation.
  • the selected inclination makes it possible, in addition to the radial force, to apply an axial force component to the conveying medium, which optimizes the release of solids contained therein, which have been picked up and stripped off by the finger 30.
  • the angle ⁇ should be in the range between 5 ° and 75 ° or 10 ° to 45 °. In the exemplary embodiment shown here, an angle of inclination ⁇ of approximately 25 ° is assumed (see Fig. Figure 7a, 7b ).
  • the scraper finger 30 is mounted on the inner wall of the inlet 15 of the wear wall and extends in the direction of the axis of rotation R.
  • the length of the scraper finger 30 should be at least 30%, preferably at least 50% or at best approx. 70% to 80% of the radius of the cylindrical Inlet 15, which is hereinafter referred to as rsaug.
  • the finger 30 is shaped like a pyramid with a total of three side surfaces 33, 35a, 35b and the base surface resting on the inner wall of the inlet 15.
  • the upper finger surface 33 facing the leading edge 23 of the impeller 20 is not planar, but rather has a continuous curvature, both in the longitudinal direction of the finger (see radial direction KR see FIG Figure 5b ) as well as in the transverse direction (tangential direction KT see Figure 8 ). In total, a type of conical surface 33 results here.
  • the other side surfaces ie the lateral contact surface 35a as well as the rear side surface 35b, also have corresponding curvatures, the rear side surface 35b even providing a double curvature in different directions.
  • the front contact surface 35a of the Finger 30 inclined at an angle ⁇ of 0 ° to 30 ° to the axis of rotation R.
  • the angle ⁇ to a parallel P1 of the axis of rotation R is drawn.
  • the rear surface 35b of the finger 30 is less critical and can be inclined at an angle ⁇ with respect to the axis of rotation R or the parallel line P2 to the axis of rotation R of 0 ° by 50 °.
  • the surface 35c can be rounded tangentially to the adjoining surfaces 35a, 35b.
  • the leading edges 23 of the impeller 20 run towards the lateral engagement surface 35a and then move past the opposite finger surface 33.
  • the transition edge between the lateral contact surface 35a and the upper surface 33 forms the so-called scraper edge, through which solids deposited on the leading edges are wiped off and, due to the radial and axial speed of the conveying medium, are released into the spiral groove 11, via which they ultimately pass the impeller 20 the delivery chamber 16 to the pressure port 13 are ejected.
  • the distance between the leading edge 23 and the surface 33 or the wiping edge of the wiping finger 30 should be in a range between 0.05 to 3mm, this distance can vary in the radial direction, but should remain within the aforementioned value interval if possible. If the distance chosen is too large, there is the risk that small solids cannot be detected by the scraper finger 30, whereas a distance chosen too small increases the risk of the scraper finger 30 and the leading edge 23 running into it.
  • the finger 30 or the upper surface 33 or at least the wiping edge should also have a corresponding inclination by the angle ⁇ . This can also be seen in Figure 7b .
  • the angles of inclination of the leading edge 23 and surface 33 do not necessarily have to be exactly identical but can also show slight differences. Despite these angle differences, however, the previously defined distance value should be within the desired range of values.
  • the relative position of the stripping finger 30 to the spur 17 of the spiral housing 10 also influences the delivery of the stripped solids to the pressure port 13.
  • Solids such as stones can possibly collect in the lower part of the pump housing or impeller.
  • the relative position of the stripping finger 30 to the spur 17 can be determined by the in Fig. 2 Define the drawn angle réelle.
  • the angle ⁇ corresponds to the wrap angle, which is defined by the angle of intersection between the perpendicular and the straight line G1.
  • the straight line G1 is perpendicular to the axis of rotation R and runs through the point of the lateral contact surface 35a of the scraper finger 30 furthest in the radial direction from the axis of rotation R.
  • Recommended values for the angle ⁇ are in the range between 0 ° to 45 °, with an angle of 20 ° to 30 ° has proven to be particularly advantageous.
  • the leading edge 23 of the blades 21a, 21b moves past the upper surface 33.
  • the tangent at the lowest point of the upper surface 33 (point of the smallest distance to the leading edge 23) forms the angle ⁇ with the tangent of the leading edge.
  • the angle ⁇ should be approximately 90 °.
  • the angle ⁇ can also increase as the radius r increases, starting from the impeller hub 22. This means that as the radius r increases, the angle ⁇ also increases.
  • the normalized radius (r - r suction ) where r suction represents the radius of the inlet 15, which is located in the Figure 9 shown course are accepted.
  • the angle ⁇ near the center of the impeller 20 can be between 50 ° and 120 ° and at the outer edge is between 85 ° and 160 °.
  • the angle course can be freely selected within this range, but ideally a steadily increasing angle ⁇ should be selected.
  • the lateral contact surface 35a of the finger 30 should also assume an angle ⁇ between 180 ° to 120 ° in relation to the tangential course of the groove 11.
  • This angle ⁇ is in Figure 3 clarifies and has the value there about 165 °.
  • the finger 30 can be designed with a cutting edge 32 which extends perpendicular to the surface 33 of the finger in the region of the transition to the fastening element 31.
  • the cutting edge runs almost parallel to the axis of rotation R.
  • the stripping finger 30 can be detachably connected to the wear wall 12 or the housing 10, whereby it must be ensured here that the fastening element 31 does not protrude into the inlet 15 in this way to avoid any influence on the flow properties within the pump.
  • the Fig. 9 shows the angular curve ⁇ between the running leading edge 23 of the impeller 20 and the finger 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP19191970.3A 2019-08-15 2019-08-15 Élément de raclage pour bords d'attaque de roue à aubes pour des pompes à eau Active EP3779201B1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP19191970.3A EP3779201B1 (fr) 2019-08-15 2019-08-15 Élément de raclage pour bords d'attaque de roue à aubes pour des pompes à eau
HUE19191970A HUE062508T2 (hu) 2019-08-15 2019-08-15 Lehúzóelem szennyvízszivattyúk járókerekeinek belépõéleihez
BR112022002294A BR112022002294A2 (pt) 2019-08-15 2020-08-03 Bomba de águas residuais para transportar águas residuais carregadas de sólidos
CN202080057382.5A CN114245849A (zh) 2019-08-15 2020-08-03 用于污水泵的叶轮进口边缘的刮除元件
AU2020327570A AU2020327570A1 (en) 2019-08-15 2020-08-03 Wiping element for impeller leading edges of wastewater pumps
PCT/EP2020/071792 WO2021028246A1 (fr) 2019-08-15 2020-08-03 Élément d'essuyage pour bords d'attaque de turbine de pompes pour eaux usées
US17/635,236 US20220290695A1 (en) 2019-08-15 2020-08-03 Wiping Element for Impeller Leading Edges of Wastewater Pumps
CA3149426A CA3149426A1 (fr) 2019-08-15 2020-08-03 Element d'essuyage pour bords d'attaque de turbine de pompes pour eaux usees

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19191970.3A EP3779201B1 (fr) 2019-08-15 2019-08-15 Élément de raclage pour bords d'attaque de roue à aubes pour des pompes à eau

Publications (3)

Publication Number Publication Date
EP3779201A1 true EP3779201A1 (fr) 2021-02-17
EP3779201C0 EP3779201C0 (fr) 2023-06-07
EP3779201B1 EP3779201B1 (fr) 2023-06-07

Family

ID=67659004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19191970.3A Active EP3779201B1 (fr) 2019-08-15 2019-08-15 Élément de raclage pour bords d'attaque de roue à aubes pour des pompes à eau

Country Status (8)

Country Link
US (1) US20220290695A1 (fr)
EP (1) EP3779201B1 (fr)
CN (1) CN114245849A (fr)
AU (1) AU2020327570A1 (fr)
BR (1) BR112022002294A2 (fr)
CA (1) CA3149426A1 (fr)
HU (1) HUE062508T2 (fr)
WO (1) WO2021028246A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3988793A1 (fr) * 2020-10-26 2022-04-27 Xylem Europe GmbH Siège de roue pour une pompe doté d'une broche de guidage
EP4102080A1 (fr) * 2021-06-08 2022-12-14 Xylem Europe GmbH Pompe et unité hydraulique d'une pompe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023057236A1 (fr) 2021-10-04 2023-04-13 KSB SE & Co. KGaA Pompe centrifuge dotée d'une paroi d'usure résistante à l'usure pourvue d'un élément de raclage
DE102022124356A1 (de) 2021-10-04 2023-05-25 KSB SE & Co. KGaA Kreiselpumpe mit verschleißbeständiger Schleißwand mit Abstreifelementrschleißbeständiger Schleißwand mit Abstreifelement

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US4604035A (en) * 1985-01-02 1986-08-05 A. O. Smith Harvestore Products, Inc. Submersible pump having frangible drive connection
US6190121B1 (en) * 1999-02-12 2001-02-20 Hayward Gordon Limited Centrifugal pump with solids cutting action
US20090123270A1 (en) * 2005-07-01 2009-05-14 Itt Manufacturing Enterprises Inc. Pump

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JP4326616B2 (ja) * 1999-01-11 2009-09-09 株式会社鶴見製作所 繊維状、紐状異物を含む汚水汚物中で使用されるボルテックス型遠心ポンプにおける羽根車入口部の閉塞防止装置
SE524048C2 (sv) * 2002-04-26 2004-06-22 Itt Mfg Enterprises Inc Anordning vid pump
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SE0501382L (sv) * 2005-06-17 2006-06-13 Itt Mfg Enterprises Inc Pump för pumpning av förorenad vätska
SE530785C2 (sv) * 2006-01-23 2008-09-09 Itt Mfg Enterprises Inc Pump för pumpning av förorenad vätska innefattande fast material
DK2888484T3 (da) * 2012-08-23 2021-05-03 Sulzer Management Ag Pumpe til transport af spildevand samt løbehjul og bundplade til en sådan
SE539558C2 (sv) * 2013-08-15 2017-10-10 Xylem Ip Man S À R L Pump för pumpning av vätska samt pumphjulssammansättning
JP6415116B2 (ja) * 2014-05-30 2018-10-31 株式会社荏原製作所 汚水ポンプ用のケーシングライナ及びこれを備えた汚水ポンプ
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US4604035A (en) * 1985-01-02 1986-08-05 A. O. Smith Harvestore Products, Inc. Submersible pump having frangible drive connection
US6190121B1 (en) * 1999-02-12 2001-02-20 Hayward Gordon Limited Centrifugal pump with solids cutting action
US20090123270A1 (en) * 2005-07-01 2009-05-14 Itt Manufacturing Enterprises Inc. Pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3988793A1 (fr) * 2020-10-26 2022-04-27 Xylem Europe GmbH Siège de roue pour une pompe doté d'une broche de guidage
US11994149B2 (en) 2020-10-26 2024-05-28 Xylem Europe Gmbh Impeller seat with a guide pin for a pump
EP4102080A1 (fr) * 2021-06-08 2022-12-14 Xylem Europe GmbH Pompe et unité hydraulique d'une pompe
WO2022258595A1 (fr) * 2021-06-08 2022-12-15 Xylem Europe Gmbh Pompe et unité hydraulique d'une pompe

Also Published As

Publication number Publication date
US20220290695A1 (en) 2022-09-15
AU2020327570A1 (en) 2022-02-17
HUE062508T2 (hu) 2023-11-28
WO2021028246A1 (fr) 2021-02-18
CN114245849A (zh) 2022-03-25
BR112022002294A2 (pt) 2022-04-26
EP3779201C0 (fr) 2023-06-07
EP3779201B1 (fr) 2023-06-07
CA3149426A1 (fr) 2021-02-18

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