EP2929191A1 - Pompe centrifuge, en particulier pour eaux usées ou eaux grasses - Google Patents

Pompe centrifuge, en particulier pour eaux usées ou eaux grasses

Info

Publication number
EP2929191A1
EP2929191A1 EP13805772.4A EP13805772A EP2929191A1 EP 2929191 A1 EP2929191 A1 EP 2929191A1 EP 13805772 A EP13805772 A EP 13805772A EP 2929191 A1 EP2929191 A1 EP 2929191A1
Authority
EP
European Patent Office
Prior art keywords
bottom plate
impeller
centrifugal pump
pump according
blades
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
EP13805772.4A
Other languages
German (de)
English (en)
Other versions
EP2929191B1 (fr
Inventor
Holger Stark
Alfred J. Otto
Wolfgang Geier
Bernd Kretschmer
Wolfgang Strössner
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.)
Wilo SE
Original Assignee
Wilo SE
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 Wilo SE filed Critical Wilo SE
Publication of EP2929191A1 publication Critical patent/EP2929191A1/fr
Application granted granted Critical
Publication of EP2929191B1 publication Critical patent/EP2929191B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid 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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal 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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0027—Varying behaviour or the very pump
    • F04D15/0033—By-passing by increasing clearance between impeller and its casing
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/622—Adjusting the clearances between rotary and stationary parts
    • 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
    • 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
    • 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

  • Centrifugal pump especially for sewage or dirty water
  • the invention relates to a centrifugal pump in particular sewage or
  • Wastewater often contains coarse solids such as long-fiber admixtures that can clog a centrifugal pump. To reduce this risk of clogging, it is known to have between the suction port
  • Base plate and the impeller provide a large distance, so that larger solid particles flow past the side of the impeller without blocking it. The efficiency of such a low-circulation centrifugal pump is thereby substantially reduced.
  • the object of the invention is to improve a centrifugal pump of the type mentioned so that at high pump efficiency a high
  • suction opening having, the impeller facing bottom plate or at least one
  • CONFIRMATION COPY is movably mounted against spring pressure, aass changes their distance from the impeller and thus to the impeller blades.
  • the distance between the impeller and the base plate adapts itself to the degree of contamination and the size of the subsidized solids and / or can be adjusted optimally by adjusting accordingly.
  • the bottom plate or the segment (s) of the bottom plate is / are supported by at least one set screw on the pump housing.
  • a particularly simple and stable construction is provided when the adjusting screw (s) penetrate / penetrate the base plate and engage / rest with its head in a bore extension which opens towards the impeller.
  • Adaptability to the degree of contamination is given when the bottom plate a immovable or movably mounted on the pump housing first region and at least one on the first region and / or on the housing wall against spring pressure movably mounted second
  • the movable second area can be held by at least one screw limited movable on the fixed area and / or on the housing wall.
  • the distance between the blades and the bottom plate increases from the blade leading edge to the blade outlet edge. It is advantageous if the distance between the blades and the bottom plate is 0.5 to 2 mm.
  • the impeller has two curved blades. An advantageous embodiment oestent aann that the bottom plate on its side facing the impeller trough-shaped in particular is concave and the height of the blades decreases according to the Bodenplattenwölbung to the outside.
  • a low-vibration rectilinear input flow is achieved when the suction opening has groove-shaped flow channels in its inner wall, which are preferably arranged parallel to the main flow direction in the suction opening.
  • the inner wall of the suction opening is cylindrical and the flow channels are arranged axially parallel to the axis of the cylinder inner wall.
  • Fig. 1 is a perspective view of an axial section through a
  • Centrifugal pump, 2 is a view of the pump impeller
  • Fig. 5 shows an axial section through a centrifugal pump with externally adjustable
  • Fig. 6 shows an axial section through a centrifugal pump with inner movable
  • FIG. 7 is a perspective view of an axial section through a
  • Fig. 8 is a perspective view of the bottom plate with movable
  • the centrifugal pump according to the invention is particularly suitable for pumping sewage and dirty water containing solids. Preferably, it is part of a submersible water pump.
  • the pump impeller 1 is driven by the shaft of an electric motor, not shown, and is seated in a pumping chamber which lies between a coaxial suction opening 8 forming the bottom plate 7 and a partition wall which separates the electric motor from the pump chamber.
  • the impeller 1 made of plastic or metal sucks through the suction port 8 to the fluid and promotes it radially to the spiral channel 14, which is formed by the pump housing 13, the impeller surrounds and opens into the Pumpend jerk.
  • the bottom plate 7 is on its side facing the impeller 1 trough-shaped in particular concave and the height of the blades 3, 4 increases accordingly
  • the impeller 1 is a half-open impeller, that is, it has on the partition 13 side facing a circular support plate (cover plate) 2 and has no front cover plate.
  • the support disk On the surface facing the suction opening 8, the support disk carries two blades 3, 4 which are curved (in particular C-shaped), wherein the concave surface of each blade 3, 4 faces the impeller axis.
  • two shovels can also one, three or more
  • Blades attached to the support plate 2 in particular be molded.
  • the approximately C-shaped curved blades 3, 4 extend from the inside outward to the edge of the impeller 1, wherein the generatrix of the blade extends parallel or obliquely to the pump axis and thus to the impeller axis, so that each blade perpendicular or oblique to the plane rear surface 2a the
  • Support disk front 2b stands.
  • the free leading edge of each blade 3, 4 forms an elongated thickening 12, which extends in the embodiment of FIG. 1 as a profile along the leading edge, wherein the profile has a three, four or polygonal cross section with one of the inner surface 7 c of the bottom plate 7 facing oblique longitudinal surface which runs as a chamfer 6 parallel to the surface 7c.
  • Longitudinal surface / chamfer 6 and the surface 7ca preferably 0.5 to 2 mm. Also, in this case, the distance between the blades 3, 4 and the bottom plate 7 increase from the blade inlet edge to the blade outlet edge.
  • the elongated thickening 12 is not formed by a profile with a constant cross section over the length, but the thickening 12 is either only partially in particular
  • the largest cross section of the elongated thickening 12 is always greater than the width or thickness D of the blade 3, 4.
  • the thickening 12 projects on both or at least on one side of the blade.
  • Forming edge of the blade carries an elongated, in particular integrally formed thickening 9, which runs along the inner blade end 9a and is parallel to the running wheel axis in the embodiment shown in FIG. But it can also be at least one of the thickening obliquely and thus arranged at an acute angle to the impeller axis.
  • the profiles may also have other shaped cross-sections, in particular oval or elliptical.
  • the cross section can change over its length, in particular sections, in shape and / or size.
  • Thickenings 9 and 12 are preferably made of the material of the blade and thus of the same plastic or metal of the blade and preferably formed.
  • the distance between the bottom plate 7 and the blades 3, 4 is adjustable, so that the pump is adaptable to the various admixtures in the wastewater or wastewater.
  • Either the entire base plate is adjustable in height or at least the range traveled by the blades.
  • the adjustment takes place z. B. by thread, screws 16 or wedge surfaces by hand, especially with tools or motor, hydraulic or pneumatic, especially computer-controlled and / or remotely controlled.
  • the bottom plate 7 is fixed to the pump housing 13 by adjusting screws 16 which are arranged on the outer edge of the bottom plate, so that an adjustment of the distance of the bottom plate 7 from the impeller 1 can be done from the outside.
  • the bottom plate 7 is within the
  • the bottom plate 7 has a central opening 7 d, with the
  • Suction opening 8 of the housing wall is aligned.
  • the inner bottom plate 7 is supported by at least one, preferably three or four screws 16 on the housing wall, which surrounds the suction opening 8.
  • each screw 16 is located in a bore 17 of the bottom plate 7 a.
  • the bore 17 has an extension 18 which opens to the impeller and in which the screw head 21 rests.
  • a to the bottom plate opening towards extension 19 also has the threaded hole in the housing wall, in which extension 19 a helical compression spring 20 rests, which at the
  • Bottom of the bottom plate 7 is applied to the bottom plate in the direction of
  • Impeller 1 to press. Since a distance of several millimeters exists between the underside of the bottom plate 7 and the inside of the housing wall, the bottom plate can deflect downward (in FIG. 6) when a larger solid part passes between the bottom plate and the outer blade edges of the impeller.
  • the embodiment according to FIG. 7 differs from that according to FIG. 6 in that the internally mounted bottom plate has a first region 7a, immovable or movably mounted on the pump housing, on which a second
  • segment-shaped portion 7b is movably mounted against spring pressure and / or is movably held by elastic deformability of the component.
  • the head 21 of the screw (s) lies in one
  • Segment-shaped portion 7b so that at least the second region or the segment 7b can escape from the impeller 1, against the pressure of the spring 20 and / or deformed when larger solid particles between impeller blades and the plate-shaped segment 7b arrive.
  • the bottom plate 7 has, as shown in Fig. 3, in particular C-shaped grooves 10 which emanate from the suction port 8 and extend to the outer edge of the bottom plate 7 and opposite to the curvature of the blades 3, 4 are curved.
  • the grooves 10 promote the conveyance of the solids radially outwards, so that a self-cleaning effect occurs.
  • the promotion to the outside is reinforced by the fact that of the two
  • Base plate 7 an angle ⁇ of 110 to 160 degrees.
  • one, two, four or more grooves can be introduced in the bottom plate.
  • the preferably cylindrical suction opening 8 has in its inner wall
  • groove-shaped flow channels 11 which are preferably arranged parallel to the main flow direction in the suction opening, so that the solids in the wastewater or waste water are guided repellent to the impeller and the risk of clogging is reduced.
  • the groove-shaped flow channels 11 are distributed at equal angular intervals over the inner wall of the suction opening.
  • FIG. 3 are six
  • the number can also be smaller (3 to 5) or larger (7 to 12).

Landscapes

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

Abstract

L'invention concerne une pompe centrifuge, en particulier une motopompe submersible pour eaux usées, comprenant un rotor (1) dont la face tournée vers l'orifice d'aspiration de la pompe est ouverte et seule la face du rotor à l'opposé de l'orifice d'aspiration (8) est recouverte par un disque support de rotor (2) circulaire coaxial sur lequel sont fixées, en particulier formées d'un seul tenant, les aubes (3, 4) incurvées. La plaque de base (7) tournée vers le rotor (1) et comportant l'orifice d'aspiration (8), ou au moins un segment (7a) de ladite plaque, est supportée de manière à pouvoir se déplacer contre la force d'un ressort (20) de façon à modifier sa distance par rapport au rotor (1) et donc par rapport aux aubes (3, 4) du rotor.
EP13805772.4A 2012-12-05 2013-12-02 Pompe centrifuge, en particulier pour eaux usées ou eaux grasses Active EP2929191B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012023734.0A DE102012023734A1 (de) 2012-12-05 2012-12-05 Kreiselpumpe insbesondere für Abwasser oder Schmutzwasser
PCT/EP2013/003626 WO2014086472A1 (fr) 2012-12-05 2013-12-02 Pompe centrifuge, en particulier pour eaux usées ou eaux grasses

Publications (2)

Publication Number Publication Date
EP2929191A1 true EP2929191A1 (fr) 2015-10-14
EP2929191B1 EP2929191B1 (fr) 2020-07-15

Family

ID=49766025

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13805772.4A Active EP2929191B1 (fr) 2012-12-05 2013-12-02 Pompe centrifuge, en particulier pour eaux usées ou eaux grasses

Country Status (5)

Country Link
US (1) US9869326B2 (fr)
EP (1) EP2929191B1 (fr)
CN (1) CN104903584B (fr)
DE (1) DE102012023734A1 (fr)
WO (1) WO2014086472A1 (fr)

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EP3034887B1 (fr) 2014-12-15 2019-08-07 Sulzer Management AG Positionnement d'un couvercle de pompe à l'aide de repères sur les têtes de boulon
US10837456B2 (en) * 2015-03-27 2020-11-17 Ebara Corporation Volute pump
JP6488167B2 (ja) * 2015-03-27 2019-03-20 株式会社荏原製作所 渦巻ポンプ
EP3171029B1 (fr) * 2015-11-17 2019-10-16 Cornell Pump Company Pompe ayant des aubes de déflection avant, plaque d'usure et roue ayant des aubes de vidange
US10731651B2 (en) * 2016-02-23 2020-08-04 Baker Hughes, A Ge Company, Llc Apertures spaced around impeller bottom shroud of centrifugal pump
DE102016225908A1 (de) 2016-12-21 2018-06-21 KSB SE & Co. KGaA Freistrompumpe
PE20211153A1 (es) 2017-10-12 2021-06-28 Weir Minerals Australia Ltd Componente de entrada para una bomba de lechada
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CN108457904A (zh) * 2018-04-23 2018-08-28 汉能（天津）工业泵有限公司 一种可调节式吸入口
LU100831B1 (de) * 2018-06-12 2019-12-12 Wilo Se Kreiselpumpe mit einem Pumpengehäuse
US11339804B2 (en) * 2018-08-01 2022-05-24 Liberty Pumps, Inc. Self-cleaning pump
EP4394188A3 (fr) * 2018-12-21 2024-09-11 Grundfos Holding A/S Pompe centrifuge
US11230979B2 (en) 2019-03-08 2022-01-25 Pratt & Whitney Canada Corp. Aircraft engine fuel system and method
US11459958B2 (en) 2019-03-22 2022-10-04 Pratt & Whitney Canada Corp. Rotodynamic pump having a body defining a body cavity with a first and second housing portion defining a portion of an impeller cavity and disposed within the body cavity wherein the body cavity extends at least in part around the second housing portion and the housing portions defining an impeller clearance
US11280342B2 (en) 2019-04-05 2022-03-22 Pratt & Whitney Canada Corp. Rotodynamic pump and method
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CN110966208A (zh) * 2019-11-26 2020-04-07 烟台龙港泵业股份有限公司 一种用于pvc浆料s型回旋式叶片的离心泵
CN112539181B (zh) * 2020-11-30 2024-06-25 镇江福泰克流体技术有限公司 一种高扬程的立式输卤泵
CN112502998B (zh) * 2020-12-01 2022-08-05 石家庄栾兴泵业有限公司 一种低噪节能的双壳渣浆泵
CN113819088B (zh) * 2021-09-07 2023-08-08 安徽凯特泵业有限公司 一种具有角度调节功能的潜水排污泵
CN115788919A (zh) 2021-09-09 2023-03-14 创科无线普通合伙 潜水泵
CN115450922A (zh) * 2022-07-25 2022-12-09 毅飞泵业（福州）有限公司 一种半开式叶轮水泵及其制作方法
IT202200026577A1 (it) * 2022-12-22 2024-06-22 Caprari Spa Pompa centrifuga
IT202200026505A1 (it) * 2022-12-22 2024-06-22 Caprari Spa Pompa centrifuga
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CN120576125B (zh) * 2025-07-15 2026-03-13 沈阳东野泵业有限公司 一种节能高效离心式水泵

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Also Published As

Publication number Publication date
EP2929191B1 (fr) 2020-07-15
CN104903584B (zh) 2017-07-14
US20150292519A1 (en) 2015-10-15
WO2014086472A1 (fr) 2014-06-12
DE102012023734A1 (de) 2014-06-05
CN104903584A (zh) 2015-09-09
US9869326B2 (en) 2018-01-16

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