EP2232080A1 - Rotor de pompe - Google Patents

Rotor de pompe

Info

Publication number
EP2232080A1
EP2232080A1 EP09703931A EP09703931A EP2232080A1 EP 2232080 A1 EP2232080 A1 EP 2232080A1 EP 09703931 A EP09703931 A EP 09703931A EP 09703931 A EP09703931 A EP 09703931A EP 2232080 A1 EP2232080 A1 EP 2232080A1
Authority
EP
European Patent Office
Prior art keywords
impeller
side cover
cover plate
pressure
suction
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
EP09703931A
Other languages
German (de)
English (en)
Other versions
EP2232080B1 (fr
Inventor
Gerald Feichtinger
Martin Schober
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.)
Bitter Engineering & Systemtechnik GmbH
Original Assignee
Bitter Engineering & Systemtechnik GmbH
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 Bitter Engineering & Systemtechnik GmbH filed Critical Bitter Engineering & Systemtechnik GmbH
Publication of EP2232080A1 publication Critical patent/EP2232080A1/fr
Application granted granted Critical
Publication of EP2232080B1 publication Critical patent/EP2232080B1/fr
Not-in-force 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly

Definitions

  • the invention relates to an impeller for a pump, in particular for a cooling water pump of an internal combustion engine, with an impeller body with a hub, a suction-side cover plate with a central opening for sucking a pumped medium and at least one blade, which is integrally connected to the suction-side cover plate and the an inner portion in the region of the central opening and an outer portion in the region of the suction-side cover disk, wherein the blade in the inner portion is three-dimensionally curved and formed in the outer portion substantially two-dimensional.
  • the impellers of radial pumps are predominantly designed as so-called closed two-dimensional impellers. This means that blades are trapped between two shrouds, forming inside the impeller closed flow channels. Such closed impellers allow the achievement of good pump efficiencies.
  • the disadvantage is that the production of such wheels is expensive. Such a production can take place, for example, in a two-part form in that, on the one hand, a cover disk with blades formed thereon and, on the other hand, the other cover disk are produced separately and connected to the final running wheel.
  • a solution is shown for example in US 2,710,580 A.
  • DE 40 40 200 A shows such a solution in which the impeller has a pressure-side cover plate and a suction-side cover plate, between which the blades are arranged, wherein the suction-side cover plate has a central opening.
  • the vanes are arranged between the cover disks, wherein the suction-side cover disk has a central opening whose inner diameter is greater than the outer diameter of the pressure-side cover disk.
  • DE 197 42 023 A discloses a composite of several segments impeller, in which the individual parts are indeed easy to produce, but which is complex and correspondingly complex in total.
  • Another impeller with a total of three-dimensionally curved blades is described in JP 59-165895 A. Again, the production is correspondingly complex.
  • EP 1 552 161 B1 describes an impeller for a pump, which has a suction-side covering disk with a central opening for sucking in a conveying medium and at least one blade integrally connected with the suction-side covering disk.
  • the blades are curved three-dimensionally and are curved two-dimensionally in the outer portion in the region of the suction-side cover disk.
  • a multi-part centrifugal pump impeller which has blades with a pressure-side cover disk and a suction-side cover disk, wherein the suction-side cover disk is formed as a single part and connected to the impeller.
  • the object of the invention is to avoid these disadvantages and to achieve an improvement in the efficiency compared to known Laufradaus enclosureen with ease of manufacture of the impeller.
  • the impeller has a pressure-side cover plate which is formed as a separate part and rotatably connected to the impeller body and that the pressure-side cover plate on the side facing the blade at least one corresponding to the end face and the profile of the blade shaped groove-like depression for the blade for positive connection with this.
  • This allows the impeller with two- and three-dimensional efficiency optimized shaped blades are made in a simple manner, which are avoided by the pressure-side cover of the impeller flow losses to wake turbulence.
  • the impeller according to the invention thus combines the advantages of semi-open impellers with three-dimensionally curved blades with closed impellers.
  • the impeller Due to the semi-open design of the impeller, three-dimensionally curved blade structures can also be produced without problems even in mass production. Thereafter, the impeller is rotatably connected to the pressure-side cover plate, so that closed, spatially curved flow channels in the impeller arise.
  • the diameter of the pressure-side cover plate corresponds to at least the diameter of an adjacent annular space, which between Impeller shaft and housing is formed. If the annular space is bounded laterally by a shaft seal, then it can be provided that the diameter of the pressure-side cover disk substantially corresponds to the diameter of a shaft seal defining the annular space.
  • a manufacturing moderately simple embodiment of the invention provides that the pressure-side cover plate is made plan.
  • the wall thickness of the pressure-side cover plate corresponds approximately to the wall thickness of the suction-side cover plate.
  • Output-side pressure losses can be kept as small as possible if the diameter of the pressure-side cover disk substantially corresponds to the diameter of the suction-side cover disk. It is particularly advantageous if the flow surface of the pressure-side cover plate is formed running with the side surface of the output-side pressure spiral.
  • the impeller can be made in a two-piece mold and can be easily translated Both mold halves are demolded.
  • the impeller can be produced in a simple manner, for example in a die casting process or in a plastic injection molding process.
  • sheet metal forming techniques can also be used.
  • FIG. 1 shows a pump with an impeller according to the invention in a longitudinal section in a first embodiment
  • FIG. 2 shows a pump with an impeller according to the invention in a longitudinal section in a second embodiment
  • FIG. 3 shows the impeller from FIG. 2 in a suction-side oblique view
  • FIG. 5 shows a pump with an impeller according to the invention in a longitudinal section in a third embodiment
  • FIG. 6 shows the impeller in a suction-side oblique view.
  • FIG. 7 shows the impeller in a pressure-side oblique view
  • FIG. 8 shows a pump with an impeller according to the invention in a longitudinal section in a fourth embodiment
  • FIG. 9 shows the impeller from FIG. 8 in a suction-side oblique view
  • FIG. 10 shows a pump with an impeller according to the invention in a longitudinal section in a fifth embodiment
  • FIG. 11 shows the impeller from FIG. 10 in a pressure-side oblique view
  • the radial pumps shown in the figures each consist of a housing 1, shown only partially, with a bearing part 2 and a housing outer wall 23.
  • a pump shaft 4 is mounted at one end of an impeller 5 is attached.
  • a pump cover 7 is fixed, which surrounds the suction chamber 8 of the pump.
  • the pressure chamber 9 of the pump is arranged.
  • a running example of a mechanical seal shaft seal 10 seals the suction chamber 8 and pressure chamber 9 relative to the bearing part 2 from.
  • the impeller 5 has an impeller body 5a with a hub 11 which is rotatably connected to the impeller shaft 4. From the outer periphery of the hub 11 go from blades 13, which are designed to convey the fluid. The blades 13 are integrally connected to a suction-side cover plate 14, which has a central opening 15, is sucked through the conveying medium. On the opposite side of the semi-open running wheel body 5a is rotatably connected to a pressure-side cover plate 24.
  • the pressure-side cover plate 24 can be connected by means of a press fit with the impeller body 5a.
  • the wall thickness Si of the pressure-side cover plate 24 corresponds approximately to the wall thickness S 2 of the suction-side cover plate 14. Die Size and the shape of the pressure-side cover plate 24 is different in the embodiments shown in FIGS. 1 to 11.
  • the blades 13 have an inner portion 13a in the region of the opening 15 and an outer portion 13b in the region of the suction-side cover plate 14.
  • the diameter d of the opening 15 in the exemplary embodiment is about half the diameter D of the impeller. 5
  • the inner portion 13a of the blades 13 is helically curved, but free of overlaps or overlaps in the axial direction, to ensure easy releasability.
  • the blades 13 apart from any cast bevels, a rectangular cross-section which is perpendicular to the suction-side cover plate 14, to ensure a simple demolding here too.
  • a convex surface 16 of the blades 13 extends smoothly from the inner portion 13a to the outer portion 13b. Opposite the convex surface 16, a concave surface 17 is formed. In the concave surface 17, an edge 18 is formed from the inner portion 13a to the outer portion 13b, which is required by casting.
  • the suction-side cover plate 14 is rounded in the transition to the opening 15 at 20 in order to achieve optimum flow deflection.
  • An axial projection 21 in the region of the opening 15 enables a possible flow optimization.
  • the blades 13 on the pressure side on an end face 22 which - at least partially - forms the support for the pressure-side cover plate 24.
  • the end face 22 may lie in a plane perpendicular to the axis 5 'of the impeller 5 (FIG. 1, as well as FIGS. 5 to 7) or be convexly curved towards the pressure-side cover disk 24.
  • Fig. 1 shows an embodiment in which the diameter di of the pressure-side cover plate 24 substantially corresponds to the diameter of the shaft seal 10, which is arranged in a spanned between the impeller shaft 4 and the housing 2 annular space 25. Swirling in the annular space 25 by the impeller 5 is avoided by the pressure-side cover disk 24.
  • Fig. 2 shows an embodiment in which the pressure-side cover plate 24 slightly convex and slightly concave to form flow channels on the blades 13 facing side 24a. This makes it possible to reduce the flow losses.
  • FIGS. 5 to 11 show embodiments in which the diameter d 1 of the pressure-side cover disk 24 is approximately the same as the diameter d 2 of the suction-side cover disk 14.
  • the pressure-side cover disk 24 has a white cover disk. significantly larger diameter than the annulus 25. This allows flow losses due to turbulence and detachments on the pressure side of the impeller 5 can be further reduced.
  • the pressure-side cover plate 24 is planar, also in Figs. 8 and Fig. 10, the pressure-side cover plate 24 on the impeller side facing concave shaped according to the flow channels of the impeller 5 to flow separation within the impeller 5 to avoid.
  • the pressure-side cover disk 24 has depressions 26 formed on the side 24 a facing the blades 13 corresponding to the end faces 22 of the blades 13.
  • the end faces 22 of the blades 13 come to lie in the recesses 26 of the pressure-side cover plate 24, whereby a positive rotational connection of the impeller 5 and the pressure-side cover plate 24 is made, wherein impeller 5 and the pressure-side cover plate 24 may be interconnected by a press connection. It is also possible to fix the impeller body 5a and the pressure-side cover plate 24 by a frictional and positive connection and both parts via a screw not shown on the impeller shaft 4.
  • impeller 5 With the described impeller 5 according to the invention pumps can be produced at extremely high efficiency cost, which exceeds the efficiency of pumps with closed impellers with two-dimensional blades. In this case, the impeller 5 due to its simple demolding availability is very easy to produce by casting. Moreover, such an impeller 5 has excellent cavitation properties.
  • the impeller 5 according to the invention is particularly suitable for the conversion and upgrade of pumps with a relatively large annulus 25, without the pump housing 2 must be replaced or changed.

Landscapes

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

Abstract

L'invention concerne un rotor (5) destiné à une pompe, en particulier une pompe à eau de refroidissement d'un moteur à combustion interne. Ce rotor est pourvu d'un corps (5a) comprenant un moyeu (11), un disque de recouvrement côté aspiration (14) présentant une ouverture centrale (15) pour aspirer un liquide refoulé, ainsi qu'au moins une aube (13) qui est reliée à ce disque de recouvrement côté aspiration (14) de telle sorte que ces deux éléments ne forment qu'une seule pièce, cette aube (13) comportant une section intérieure (13a) située au niveau de l'ouverture centrale (15) et une section extérieure (13b) située au niveau du disque de recouvrement côté aspiration (14). Par ailleurs, l'aube (13) présente au niveau de la section intérieure (13a) une courbure en trois dimensions et au niveau de la section extérieure (13b) une courbure sensiblement en deux dimensions. L'objectif de l'invention est d'améliorer ce rotor de pompe de sorte qu'il présente un haut rendement tout en étant simple à produire. À cet effet, le rotor (5) selon l'invention présente un disque de recouvrement côté pression (24) qui est conçu sous la forme d'une pièce séparée et est relié solidaire en rotation au corps (5a) du rotor, et le disque de recouvrement côté pression (24) présente sur sa face (24a) tournée vers l'aube (13) au moins un évidement (26) de type rainure dont la forme est adaptée à la face frontale (22) et au profil de l'aube (13) de sorte que ce disque et l'aube (13) soient assemblés par complémentarité de forme.
EP09703931A 2008-01-25 2009-01-20 Rotor de pompe Not-in-force EP2232080B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0011408A AT506342B1 (de) 2008-01-25 2008-01-25 Laufrad für eine pumpe
PCT/EP2009/050602 WO2009092711A1 (fr) 2008-01-25 2009-01-20 Rotor de pompe

Publications (2)

Publication Number Publication Date
EP2232080A1 true EP2232080A1 (fr) 2010-09-29
EP2232080B1 EP2232080B1 (fr) 2012-03-14

Family

ID=40513933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09703931A Not-in-force EP2232080B1 (fr) 2008-01-25 2009-01-20 Rotor de pompe

Country Status (5)

Country Link
US (1) US20100316497A1 (fr)
EP (1) EP2232080B1 (fr)
AT (2) AT506342B1 (fr)
BR (1) BRPI0906780B1 (fr)
WO (1) WO2009092711A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011012074A1 (de) * 2011-02-23 2012-08-23 Wilo Se Laufrad einer Kreiselpumpe
US20140030099A1 (en) * 2012-07-27 2014-01-30 GM Global Technology Operations LLC Pump impeller
DE102014201487B3 (de) * 2014-01-28 2015-03-05 Bühler Motor GmbH Kreiselpumpenlaufrad
AT517163B1 (de) 2015-05-13 2019-08-15 Bitter Eng & Systemtechnik Gmbh Kreiselpumpe
US10584713B2 (en) 2018-01-05 2020-03-10 Spectrum Brands, Inc. Impeller assembly for use in an aquarium filter pump and methods
DE102020123517B4 (de) 2020-09-09 2024-06-06 Nidec Gpm Gmbh Laufrad für eine Zentrifugalflüssigkeitspumpe sowie Zentrifugalflüssigkeitspumpe aufweisend das Laufrad und Kraftfahrzeug aufweisend eine solche Zentrifugalfluidpumpe
CN116398351B (zh) * 2023-03-02 2025-07-04 大唐水电科学技术研究院有限公司 水轮机电液调节系统转速死区的测试方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2710580A (en) 1946-10-29 1955-06-14 Kellogg M W Co Vaned rotor
US3107627A (en) 1958-06-27 1963-10-22 Stalker Corp Rotor for radial flow pumping means
JPS59165895A (ja) 1983-03-09 1984-09-19 Kubota Ltd 遠心うず巻ポンプの羽根車
ATE38708T1 (de) * 1984-05-24 1988-12-15 Moh 9 Proprietary Limited Fluegelrad fuer pumpe.
DE3611910A1 (de) 1986-04-09 1987-10-15 Schaeffler Waelzlager Kg Laufrad fuer eine radialpumpe
US4720242A (en) 1987-03-23 1988-01-19 Lowara, S.P.A. Centrifugal pump impeller
DE3731161C2 (de) 1987-09-17 1996-12-12 Klein Schanzlin & Becker Ag Kreiselpumpenlaufrad
DE3839190C1 (fr) 1988-11-18 1990-04-19 Ksb Aktiengesellschaft, 6710 Frankenthal, De
DE4040200C2 (de) 1990-12-15 1994-11-17 Freudenberg Carl Fa Kühlmittelpumpe zur Montage an dem Pumpengehäuse einer Brennkraftmaschine
DE19742023B4 (de) 1997-09-24 2006-07-13 Beez, Günther, Dipl.-Ing. Laufrad
DE10050108A1 (de) 2000-10-09 2002-06-06 Allweiler Ag Laufrad für eine Kreiselpumpe
AT413872B (de) 2002-10-17 2006-06-15 Bitter Engineering & Systemtec Laufrad für eine pumpe
DE10354749A1 (de) 2003-11-21 2005-06-23 Siemens Ag Verfahren zur Herstellung eines Laufrades für eine Kreiselpumpe
DE102005031589A1 (de) * 2005-07-06 2007-01-11 Schaeffler Kg Wasserpumpenflügelrad
US7628586B2 (en) * 2005-12-28 2009-12-08 Elliott Company Impeller
US7762778B2 (en) * 2007-05-17 2010-07-27 Kurz-Kasch, Inc. Fan impeller

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009092711A1 *

Also Published As

Publication number Publication date
ATE549517T1 (de) 2012-03-15
AT506342B1 (de) 2011-03-15
US20100316497A1 (en) 2010-12-16
AT506342A1 (de) 2009-08-15
BRPI0906780B1 (pt) 2020-03-31
WO2009092711A1 (fr) 2009-07-30
BRPI0906780A2 (pt) 2015-07-14
EP2232080B1 (fr) 2012-03-14

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