EP2188532B1 - Pumpenlaufrad und pumpe umfassend ein derartiges pumpenlaufrad - Google Patents

Pumpenlaufrad und pumpe umfassend ein derartiges pumpenlaufrad Download PDF

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Publication number
EP2188532B1
EP2188532B1 EP08787296A EP08787296A EP2188532B1 EP 2188532 B1 EP2188532 B1 EP 2188532B1 EP 08787296 A EP08787296 A EP 08787296A EP 08787296 A EP08787296 A EP 08787296A EP 2188532 B1 EP2188532 B1 EP 2188532B1
Authority
EP
European Patent Office
Prior art keywords
rotation
pump
hub
accordance
pump rotor
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
EP08787296A
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German (de)
English (en)
French (fr)
Other versions
EP2188532A1 (de
Inventor
Carl STÄHLE
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.)
Frideco AG
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Frideco AG
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Filing date
Publication date
Application filed by Frideco AG filed Critical Frideco AG
Priority to EP08787296A priority Critical patent/EP2188532B1/de
Publication of EP2188532A1 publication Critical patent/EP2188532A1/de
Application granted granted Critical
Publication of EP2188532B1 publication Critical patent/EP2188532B1/de
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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
    • 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
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape

Definitions

  • the invention relates to a pump impeller according to the preamble of claim 1.
  • the invention further relates to a pump comprising the pump impeller.
  • the publication CH 662 864 discloses a centrifugal pump with a screw centrifugal open type.
  • This pump impeller or the Zentrifugalradpumpe comprising such a pump impeller has the disadvantages that the specific speed is limited, and that during operation, a pulsation and / or vibration may occur.
  • the publication EP 1 811 184 A1 which is considered to represent the closest prior art, discloses a centrifugal pump having an impeller comprising at least two vanes disposed between two axially spaced apart shields. This centrifugal pump has the disadvantages that it has a poor efficiency, and that can accumulate dirt.
  • Wastewater contains a large number of different types of contaminants such as plastic material, hygiene articles, textiles, etc. Larger problems occur in particular in connection with rags and the like, as they hang on the leading edges of the wings and wrap around the impeller hub. Such incidents lead to increased service intervals, reduced efficiency or even pump failures.
  • Object of the invention is to form a pump impeller or a pump comprising such a pump impeller, which are suitable for the promotion of waste water or other solids contained liquids and are safe and low maintenance operable, and which may have an increased capacity.
  • a pump impeller comprising a first blade, wherein the first blade comprises a first spiral blade part and a subsequent Zentrifugalradschaufelteil, and comprising a hub with a rotation axis, wherein the first Zentrifugalradschaufelteil is firmly connected to the hub, wherein at least one second vane is arranged, which comprises a second fferenradschaufelteil and a subsequent second Zentrifugalradschaufelteil, wherein the first and the second blade each having an outer edge, wherein a connecting means connecting the first and the second blade in the region of the outer edge, and wherein the hub a Forming a frusto-conical or disk-shaped bottom part that extends in the direction of rotation D1 along a partial angle, that the first Zentrifugalradschaufelteil 3b is fixedly connected to the bottom part 3e, and that the second Zentrifugalradschaufelteil 4b so is arranged running with respect to the hub 2, that forms a continuous in the direction of rotation of the bottom part 3
  • the connecting means is designed as an impeller cover, which runs concentrically to the axis of rotation, and which is fixedly connected to the outer edges of the first and second blades.
  • the impeller cover is preferably designed frusto-conical, with a circular, concentric with the axis of rotation extending inlet opening, through which flows the entire liquid to be conveyed to get to the first and second blades.
  • the first and the second Zentrifugalradschaufelteil in the longitudinal direction of the axis of rotation D to the same length.
  • the length is selected such that a small gap results between a pump housing part and the second centrifugal blade part, which considerably improves the efficiency of the pump.
  • the pump impeller according to the invention has the advantage that it has a continuous, running in the direction of rotation gap between the hub and the second blade, because the second blade is not directly connected to the hub.
  • the second blade is fixedly connected to the first blade via the connecting means, and the first blade is connected to the hub.
  • This continuous gap running between the hub and the second blade has the advantage that impurities such as rags can not be deposited or caught anywhere.
  • the passage channel formed within the pump impeller for the fluid to be delivered is preferably designed such that it has no webs, bumps or otherwise formed means to which Impurities such as rags could accumulate or adhere.
  • the inventive pump is thus particularly suitable for the promotion of waste water containing solid impurities, especially textiles, rags, etc.
  • the pump is particularly suitable for pumping municipal wastewater, as well as liquids used in industrial, chemical and municipal applications.
  • a pump comprising the impeller according to the invention with at least two blades also has the advantages that the pump has an increased delivery capacity with the same impeller size or with the same pump size, since the pump can have two or even more blades.
  • the pump can also have a higher efficiency.
  • the pump has a reduced pulsation and a reduced vibration.
  • the impeller according to the invention can also be balanced more easily, can be trimmed easier, and is easier to edit. In addition, the impeller is less susceptible to wear.
  • a pump comprising the impeller according to the invention is thus much more reliable, low-maintenance and cost-effective to operate, in particular when the pump is used to convey effluents or other solids containing liquids.
  • Fig. 1 shows a rotatable about a rotation axis D pump impeller 1 comprising a first blade 3, which is fixedly connected to the hub 2, and comprising a second blade 4, which is connected via connecting means 5 with the first blade 3, so that between the second blade 4 and the hub 2 no direct connection is required, and forms between the second blade 4 and the hub 2 in the direction of rotation D 1 extending gap 6 or 6 opening.
  • gap 6 is herein a Opening, in particular a gap-shaped opening understood.
  • the connecting means 5 is in FIG. 1 indicated only schematically, so that the arrangement of the first and second blade 3.4 is clearly visible.
  • the connecting means 5 is preferably arranged such that it mutually firmly connects the outer edges 3c, 4c of the first and second blades 3.4.
  • the connecting means 5 can be designed in a variety of ways, for example, as shown rod-shaped, part-surface or as in FIG. 5 shown as a whole lid.
  • the first vane 3 comprises a first vane blade part 3a which merges into a first centrifugal vane part 3b.
  • the first Zentrifugalradschaufelteil 3b has a pressure-side blade edge 3d.
  • the first Zentrifugalradschaufelteil 3b is fixedly connected to the hub 2 via a bottom part 3e.
  • the bottom part 3e extends in the direction of rotation D1 along a partial angle.
  • the bottom part 3e could preferably be frusto-conical or disk-shaped along the partial angle.
  • the second Zentrifugalradschaufelteil 4b is arranged so as to extend with respect to the hub 2, that in the running direction of the bottom part 2a between the second Zentrifugalradschaufelteil 4b and the hub 2 a continuous in the direction of rotation D 1 extending gap 6 forms, because the second Zentrifugalradschaufelteil 4b not directly with the Hub 2 is connected.
  • the pump impeller 1 is thus open because of the gap 6 against bottom.
  • the bottom part 3e has a sloping edge 3f.
  • the first Zentrifugalradschaufelteil 3b at the opposite end of the first fferenradschaufelteil 3a an edge 3f.
  • the first blade 3 has an outer edge 3c on its end face.
  • the second blade 4 comprises a second helical blade part 4a which in a second Centrifugal blade part 4b passes.
  • the second Zentrifugalradschaufelteil 4b has a pressure-side blade edge 4d and ends in an edge 4f.
  • the second blade 4 has an outer edge 4c on its front side.
  • the two blades 3, 4 are fixedly connected to one another via a connecting means 5, which is arranged in the region of the outer edges 3c, 4c, but spaced apart so that gaps form, in particular the gap 6 extending in the direction of rotation D1, which has an outlet in FIG Forming direction of the rotation axis D, as well as extending substantially in the direction of rotation of the axis D columns or outlet openings 6a and 6b, which result between the first and second blades 3.4.
  • the impeller 1 has no protruding edges or bumps, to which impurities such as plastic material or textiles such as rags could attach or catch. Such impurities leave the impeller 1 via the gaps 6,6a, 6b.
  • the impeller 1 edges 3f, 4f which also serve to remove possible deposits on the inner walls of the pump housing by scratching or cutting movements. In particular, it can also be used to clean the surface of a pump housing part arranged below the bottom part 3e.
  • the illustrated embodiment shows only two blades 3.4.
  • a pump impeller 1 with a plurality of blades 2 designed in accordance with the second blade 4, which are successively arranged in the direction of rotation D1 and which are all firmly connected to the first blade 3 via the connecting means 5.
  • the pump impeller 1
  • a first blade 3 and a plurality of second blades 4, for example two, three, four, five, six or seven second blades 4 could be arranged one after the other in the direction of rotation D1.
  • the first and second blade 3.4 in an advantageous embodiment in the direction of rotation D 1 extending sub-sections, which extend mutually symmetrical with respect to the axis of rotation D.
  • the first and second fferenradschaufelteil 3a, 4a with respect to the rotation axis D are mutually symmetrical.
  • the pressure-side blade edges 3d, 4d with respect to the rotation axis D mutually symmetrical.
  • FIG. 2 shows that in FIG. 1 pump impeller 1 shown from the direction of view A.
  • the connecting means 5 is shown schematically.
  • the connecting means, 5, as in FIG. 5 represented as a truncated cone-shaped body, with a circular inlet opening 5a, wherein the frusto-conical body, as in FIG. 2 indicated, abutting the outer edges 3c, 4c and is firmly connected thereto.
  • the connecting means can also be designed as a disk in the direction of rotation D radial direction or as a cylindrical tube in the axial direction D.
  • FIG. 3 shows that in FIGS. 1 and 2 illustrated pump impeller 1 from the direction B.
  • FIG. 4 shows a perspective view of the first blade 3, which comprises a first fferenradschaufelteil 3a and a first Zentrifugalradschaufelteil 3b.
  • FIG. 5 shows the first blade 3 in the identical, as in FIG. 4 shown, wherein the frusto-conical connecting part 5 is placed on the first blade 3 and fixedly connected thereto, and wherein the second blade 4 is fixedly connected to the connecting part 5, so that the entire pump impeller 1 is formed.
  • FIG. 6 shows that in FIG. 5 Pump impeller 1 shown from a slightly different perspective view. In particular, it can also be seen how the liquid flowing in via the opening 5a, if appropriate with the impurities carried along, can exit unhindered again either via the gap 6 or the lateral openings 6a, 6b.
  • FIG. 7 shows a longitudinal section through the in the FIGS. 5 and 6
  • the pump impeller 1, which is designed as an impeller cover, is connected in a fluid-tight manner to the first and second blades 3, 4, so that the conveyed fluid enters the pump impeller 1 via the circular opening 5a and leaves it again via the gaps 6, 6a, 6b ,
  • the pump housing 7 has a housing wall designed as a truncated cone 7c.
  • FIG. 8 shows a pump impeller 1 whose first and second Zentrifugalradschaufelteil 3b, 4b in the longitudinal direction of the rotation axis D have different lengths, so that between the housing wall 7c and the second Zentrifugalradschaufelteil 4b, a gap S forms, through which the liquid can flow.
  • This gap S is preferably made as small as possible or narrow in order to keep a backflow of the liquid low.
  • FIG. 9 shows a longitudinal section through a centrifugal pump 7 comprising pump housing parts 7a, 7b, 7c and the in FIG. 7 illustrated pump impeller 1.
  • the pump impeller 1 is connected to a shaft 8.
  • the pump housing could also be designed such that this, in combination with the pump impeller 1 disposed therein, an axial pump is formed by the axial pump instead of the radial outlet has a running in the direction of rotation of the axis D outlet.

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)
  • Rotary Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP08787296A 2007-08-16 2008-08-18 Pumpenlaufrad und pumpe umfassend ein derartiges pumpenlaufrad Active EP2188532B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08787296A EP2188532B1 (de) 2007-08-16 2008-08-18 Pumpenlaufrad und pumpe umfassend ein derartiges pumpenlaufrad

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP07114479 2007-08-16
PCT/EP2008/060814 WO2009022019A1 (de) 2007-08-16 2008-08-18 Pumpenlaufrad und pumpe umfassend ein derartiges pumpenlaufrad
EP08787296A EP2188532B1 (de) 2007-08-16 2008-08-18 Pumpenlaufrad und pumpe umfassend ein derartiges pumpenlaufrad

Publications (2)

Publication Number Publication Date
EP2188532A1 EP2188532A1 (de) 2010-05-26
EP2188532B1 true EP2188532B1 (de) 2011-10-12

Family

ID=38833296

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08787296A Active EP2188532B1 (de) 2007-08-16 2008-08-18 Pumpenlaufrad und pumpe umfassend ein derartiges pumpenlaufrad

Country Status (8)

Country Link
US (1) US8511966B2 (ja)
EP (1) EP2188532B1 (ja)
JP (1) JP5238809B2 (ja)
CN (1) CN101779043B (ja)
AT (1) ATE528511T1 (ja)
DK (1) DK2188532T3 (ja)
RU (1) RU2470191C2 (ja)
WO (1) WO2009022019A1 (ja)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2407185A1 (de) 2010-07-15 2012-01-18 ECP Entwicklungsgesellschaft mbH Radial komprimierbarer und expandierbarer Rotor für eine Pumpe mit einem Schaufelblatt
CN102748322A (zh) * 2012-06-29 2012-10-24 江苏国泉泵业制造有限公司 双叶片轴流泵
CN102748300A (zh) * 2012-06-29 2012-10-24 江苏国泉泵业制造有限公司 螺旋轴流泵
CN102878087A (zh) * 2012-09-18 2013-01-16 安徽天富泵阀有限公司 一种直联式淀粉泵
EP2894343B2 (en) 2014-01-12 2021-09-01 Alfa Laval Corporate AB Self-priming centrifugal pump
DK2894342T3 (en) * 2014-01-12 2017-04-03 Alfa Laval Corp Ab SELF-TILTING CENTRIFUGAL PUMP
DK2908012T3 (en) 2014-01-24 2019-04-01 Mcfinn Tech Radial impeller and centrifugal pump housing
CN109964043A (zh) * 2017-06-22 2019-07-02 希阿埃水泵私人有限公司 螺旋叶轮
CN110552909A (zh) * 2019-09-18 2019-12-10 兰州理工大学 一种非同轴面引流的螺旋轴流式叶轮
CN111517120B (zh) * 2020-04-30 2021-12-14 中国科学技术大学 一种用于热核聚变固态球床颗粒输运的加速泵

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US3692422A (en) * 1971-01-18 1972-09-19 Pierre Mengin Ets Shearing pump
NL7406866A (nl) * 1974-05-22 1975-11-25 Konijn Machinebouw Nv Baggerpomp.
JPS5113403A (ja) * 1974-07-23 1976-02-02 Toyo Denki Kogyosho Co Ltd Suichuhonpuyokatsutaafuan
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JPS52143001U (ja) * 1976-04-23 1977-10-29
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JPS54145802U (ja) * 1978-04-01 1979-10-09
CH633617A5 (de) * 1978-08-31 1982-12-15 Martin Staehle Kreiselpumpe mit einschaufel-laufrad zur foerderung von langfaserigen aufgeschwemmten feststoffen.
JPS5641487A (en) * 1979-09-11 1981-04-18 Toukiyouto Operation of pump equipped with cutters in sand sinking pool or the like
CH662864A5 (en) 1983-04-20 1987-10-30 Martin Staehle Centrifugal pump having an open-type single-blade impeller
IT1174991B (it) * 1983-07-06 1987-07-01 Pompe F B M Spa Pompa centrifuga per materiali e prodotti molto densi e/o viscosi
SU1642076A1 (ru) 1989-04-11 1991-04-15 Предприятие П/Я М-5356 Центробежный насос дл перекачки структурированных жидкостей и газожидкостных смесей
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DE19701297A1 (de) * 1997-01-16 1998-07-23 Wilo Gmbh Laufrad einer Kreiselpumpe
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Also Published As

Publication number Publication date
JP5238809B2 (ja) 2013-07-17
EP2188532A1 (de) 2010-05-26
JP2010537097A (ja) 2010-12-02
CN101779043A (zh) 2010-07-14
RU2470191C2 (ru) 2012-12-20
RU2010109741A (ru) 2011-09-27
CN101779043B (zh) 2013-03-27
US8511966B2 (en) 2013-08-20
DK2188532T3 (da) 2012-01-30
WO2009022019A1 (de) 2009-02-19
ATE528511T1 (de) 2011-10-15
US20100215504A1 (en) 2010-08-26

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