EP0013942B1 - Pompe centrifuge pour liquides contenant des matières solides - Google Patents

Pompe centrifuge pour liquides contenant des matières solides Download PDF

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Publication number
EP0013942B1
EP0013942B1 EP80100220A EP80100220A EP0013942B1 EP 0013942 B1 EP0013942 B1 EP 0013942B1 EP 80100220 A EP80100220 A EP 80100220A EP 80100220 A EP80100220 A EP 80100220A EP 0013942 B1 EP0013942 B1 EP 0013942B1
Authority
EP
European Patent Office
Prior art keywords
pump
impeller
housing
turnpin
face
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.)
Expired
Application number
EP80100220A
Other languages
German (de)
English (en)
Other versions
EP0013942A2 (fr
EP0013942A3 (en
Inventor
Hans Beham
Hans-Dieter Beham
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.)
Beham Hans
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT80100220T priority Critical patent/ATE8924T1/de
Publication of EP0013942A2 publication Critical patent/EP0013942A2/fr
Publication of EP0013942A3 publication Critical patent/EP0013942A3/de
Application granted granted Critical
Publication of EP0013942B1 publication Critical patent/EP0013942B1/fr
Expired legal-status Critical Current

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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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/049—Roller bearings
    • 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

  • the invention relates to a centrifugal pump according to the preamble of claim 1.
  • Centrifugal pumps of a type deviating from the preamble of patent claim 1 are also known, in which the annular closure member forming the liquid inlet is arranged on the same housing end face on which the drive shaft also enters the pump housing.
  • the liquid enters the pump housing from above and is discharged via a tangential outlet line.
  • the bearings of the drive shaft are not under the liquid pressure of the flow, but only under the hydrostatic pressure of the liquid on the pump, which, however, is relatively low compared to the liquid pressure of the flow, so that these pumps seal the bearings against the Liquid with relatively long terms is possible.
  • such pumps cannot be used for a number of applications.
  • a centrifugal pump in particular a heating circulation pump, has also become known from DE-PS 1 276450, which comprises a pump impeller which is mounted in a surrounding pump housing, a drive shaft which is in positive engagement with the pump impeller and is guided in the pump housing and which. penetrates an end face of the pump housing, and sealing elements are provided for sealing the housing interior against the bearing of the impeller. Furthermore, to remove the impeller on the housing end face facing away from the drive shaft, a terminating member is detachably fastened, at the outer end of which a fixed receptacle is provided for a central bearing journal running to the pump housing for mounting the pump impeller.
  • the low-pressure side of this known centrifugal pump lies on the side of the pump housing facing the drive shaft, while the high-pressure side is formed in the region of the closing element.
  • this has several disadvantages.
  • this pump when replacing an impeller, the high-pressure nozzle that leads to the high-pressure line must always be unscrewed or uncoupled. Above all, however, this pump is not suitable for pumping aggressive liquids, in particular also media containing solids, such as liquid manure.
  • a seal with a stopper is arranged on the low-pressure side, but since only a slide bearing is provided on the high-pressure side in this known pump, this is attacked and impaired by the aggressive medium.
  • this slide bearing is increasingly damaged and deflected by the pressure surges that occur.
  • a further impairment arises from the long-fiber components in the medium to be pumped, which lead to windings in the known pump on the high-pressure side and further impair the function of the sealing effect.
  • the seal provided on the low-pressure side is also affected and attacked by possible cavitation impacts due to the inertia of fiber solids in the medium to be conveyed.
  • a pump with an internal high pressure side has also become known from US Pat. No. 3,155,043.
  • bores are provided in the rotor through which the medium to be conveyed is connected to a slide bearing of the rotor in the housing.
  • This pump too, is therefore due to the disadvantages described above for conveying aggressive media interspersed with solid parts, such as, for. B. Manure unsuitable, since this plain bearing is severely attacked and impaired in this case by the aggressive medium.
  • Another disadvantage of this known pump is that enormous impacts occur when pumping medium permeated with solids, by means of which such a bearing is knocked out after a short time without the possibility of collecting these pressure loads.
  • the main advantage of the subject matter of the invention is that the annular space formed by the inner surface of the impeller and the bearing journal at its inner end, i. H. That end, which faces the driver of the drive shaft, can be sealed absolutely hermetically against the liquid pressure of the delivery flow, since a seal provided for this purpose is not axially penetrated by a component, for example the drive shaft.
  • the development according to claim 5 ensures that the gap between the envelope jacket of the impeller and the envelope jacket defined by the inner surface of the cage web or the inner surface of the cage webs can be adjusted depending on the respective state of wear.
  • the development according to claim 6 ensures that the bearing of the impeller at the outer end of the journal is relatively insensitive to the ingress of liquid due to the hydrostatic pressure, in contrast to a ball bearing.
  • the eccentricity play of the drive shaft is reliably limited at its end facing the bearing journal, which can be important in particular in the event of intermittent radial loads on the impeller by suction of solids and in the limitation of resonance vibration amplitudes of the drive shaft.
  • the embodiment according to claim 10 ensures that the contact surface of the eccentricity limitation bearing can be relatively large, so that its wear can be neglected over the entire service life of the pump.
  • the centrifugal pump illustrated there comprises a four-bladed pump impeller 1, which is mounted in a surrounding pump housing 2 of circular cross section.
  • an annular end member 3 is detachably fastened by means of a plurality of screws 4 distributed over the circumference.
  • the end member 3 comprises at its outer end facing away from the pump housing 2 a receptacle 5 for a central bearing journal 6.
  • the receptacle 5 is via two diametrical eccentric cage webs 7, which diverge conically towards the pump housing 2, with the circumference of a component of the end member 3 forming base ring flange 8 connected.
  • the edges 9 of the webs 7 opposite the jacket envelope of the impeller 1 can be provided with hard metal build-up welding beads to form tear edges. This also applies to the outer edges of the impeller 1 that define a jacket envelope.
  • the bearing pin 6 is clamped in the receptacle 5 by means of centering screws 10 and can be adjusted axially for adjustment purposes in order to adjust the annular gap between the edges 9 of the webs 7 and the imaginary envelope of the impeller 1 to a predetermined favorable value, without prejudice to possible wear the edges of the blades of the impeller 1 or the edges 9 of the webs 7 cooperating therewith.
  • the bearing journal 6 receives a radial / axial ball bearing 11 which is held axially immovably by means of a snap ring 12 .
  • the outer ring of the ball bearing 11 is pressed into an axial bore at the inner end of the impeller 1 and there secured by a snap ring 13 against axial displacement.
  • the impeller 1 is mounted by means of a plain bearing 14. Downstream of the slide bearing in the direction of the outer end of the journal 6 is an axial seal or stuffing box seal 15, on which only the hydrostatic pressure of the liquid on the pump acts.
  • the inner cross section of the axial bore of the impeller 1 adjacent to the end face of the inner end of the bearing journal 6 or adjacent to the ball bearing 11 is hermetically sealed against the liquid pressure of the delivery flow of the pump by means of a cap-like plastic plug 16.
  • the annular space 17 formed by the bearing journal 6 and the inner surface of the impeller 1 surrounding it is filled with bearing grease from the plain bearing 14 to the stopper 16.
  • a jacket tube 20 is fastened by means of a diametrically divided clamping flange 18, the segments of which are connected to the pump housing 2 by means of screws 19, which serves to encapsulate a drive shaft 21 running essentially centrally therein.
  • a flange-like driver 23 is fastened on the drive shaft 21 by means of a heavy-duty spring pin 22, which engages with corresponding end cuts of the impeller 1 via a plurality of axial driver claws 24 distributed over the circumference.
  • the driver 23 is received at an end portion with radial play in the central bore of the impeller 1, in which the ball bearing 11 is also seated.
  • the driver 23 and indirectly also the drive shaft 21 is assigned an eccentricity limiting bearing 25 which is held with centering projections 26 in the associated end face of the pump housing 2 and is held in position by means of the screws 19 by the segments of the clamping flange 18.
  • the central bore of the eccentricity limiting bearing 25 has a larger diameter than the outer diameter of the surrounding assigned section of the driver 23, so that the drive shaft 21 has a total of a certain radial play both with respect to the eccentricity limiting bearing 25 and with respect to the impeller 1.
  • the centrifugal pump is arranged below a liquid level S.
  • the liquid to be conveyed reaches the region of the impeller on the two webs 7 according to the curved arrows Pf and is conveyed upward into the impeller housing 2, where it exits through a tangential outlet pipe 27.
  • the liquid pressure specific to the pump is only reached in the pump housing 2, so that, as has already been mentioned in the introduction, the plain bearing 14 is only under the hydrostatic pressure of the liquid.
  • the plug 16 is under the full liquid pressure of the flow, but a hermetic seal is achieved because the plug 16 is neither penetrated by the journal 6 nor by the drive shaft 21.

Claims (11)

1. Pompe centrifuge pour liquides chargés de matières, solides et plus particulièrement de matières fibreuses, comportant une roue mobile (1) logée dans un corps de pompe (2) qui l'entoure, un arbre de commande (21) en assemblage solidaire avec la roue de pompe (1) et disposé dans le corps de pompe (2) dont il traverse l'une des faces, et des éléments d'étanchéité pour assurer l'étanchéité de l'intérieur du corps de pompe par rapport au logement de la roue mobile, un organe de fermeture (3) permettant l'extraction de la roue mobile étant fixé de manière démontable sur la face du corps éloignée de l'arbre de commande, organe à l'extrémité duquel est prévu un support fixe (5) pour un pivot de palier central (6) s'étendant en direction du corps de pompe (2) et destiné à servir de palier à la roue (1), caractérisée en ce que le côté haute pression se trouve à l'extrémité du pivot de palier (6) faisant face à l'arbre de commande (21) et que le côté basse pression se trouve dans la zone de l'organe de fermeture (3), ledit organe de fermeture (3) constituant l'admission du liquide, et que, du côté haute pression, l'enceinte annulaire (17) formée par la face intérieure de la roue mobile (1) et le pivot de palier (6) est fermée de façon étanche par rapport au corps de pompe (2) au moyen d'un bouchon (16), le moteur de commande étant disposé au-dessus du niveau du liquide (S).
2. Pompe selon la revendication 1, caractérisé en ce que le support (5) prévu à l'extrémité extérieure de l'organe de fermeture (3) pour le pivot de palier (6) est relié par au moins une barrette excentrique (7) au pourtour d'une bride de base annulaire (8) fixée au corps de pompe (2) et formant partie de l'organe de fermeture.
3. Pompe selon la revendication 2, caractérisé en ce que le support (5) pour le pivot de palier (6) est relié au pourtour de la bride de base annulaire (8) par l'intermédiaire de deux ou plusieurs barrettes (7) réparties sur le pourtour à la façon d'une cage.
4. Pompe selon la revendication 3, caractérisée en ce que les barrettes de cage (7) s'étan- dent en divergeant coniquement du support (5) pour le pivot de palier (6) au pourtour de la bride de base annulaire (8).
5. Pompe selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le pivot de palier (6) est réglable axialement dans le support (5) de l'organe de fermeture (3).
6. Pompe selon la revendication 1, caractérisé en ce aue la roue mobile (1) est montée, au moyen d'un palier lisse (14) à l'extrémité du pivot de palier (6) éloignée de l'arbre de commande (21
7. Pompe selon la revendication 6, caractérisé en ce que l'enceinte annulaire (17) formée par le pivot de palier (6) et la face intérieure de la roue (1) qui l'entoure, est garnie de graisse du palier glissant (14) jusqu'au bouchon (16).
8. Pompe selon la revendication 1, caractérisée en ce qu'un toc d'entraînement (23) est monté à l'extrémité de l'arbre de commande (21) entrant dans le corps de pompe (2) et qu'il est formé à la façon d'une bride comportant au moins deux griffes d'entraînement axiales (24) réparties sur le pourtour, lesquelles engrènent avec des entailles correspondantes pratiquées dans la face de la roue mobile (1).
9. Pompe selon la revendication 1, caractérisé en ce que, à l'arbre de commande (21) correspond, à son extrémité faisant face au pivot de palier (6), un palier de limitation d'extrémité (25).
10. Pompe selon les revendication 8 et 9, caractérisé en ce que le palier de limitation d'excentricité (25) entoure à grande surface le pourtour d u toc d'entraînement (23).
11. Pompe selon l'une quesconque des revendications 8 à 10, caractérisée en ce que de façon connue en soi, l'arbre de commande (21) est entouré d'un tube-enveloppe (20) fixé de manière étanche à l'une des faces du corps de pompe (2) et qu'en vue de la fixation d'un tube-enveloppe sur le corps de pompe, il est prévu une bride de serrage (18) sectionnée diamétralement.
EP80100220A 1979-01-17 1980-01-17 Pompe centrifuge pour liquides contenant des matières solides Expired EP0013942B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80100220T ATE8924T1 (de) 1979-01-17 1980-01-17 Kreiselpumpe fuer mit feststoffen versetzte fluessigkeiten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2901638 1979-01-17
DE2901638A DE2901638B1 (de) 1979-01-17 1979-01-17 Kreiselpumpe fuer mit Feststoffen versetzte Fluessigkeiten

Publications (3)

Publication Number Publication Date
EP0013942A2 EP0013942A2 (fr) 1980-08-06
EP0013942A3 EP0013942A3 (en) 1980-08-20
EP0013942B1 true EP0013942B1 (fr) 1984-08-08

Family

ID=6060742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100220A Expired EP0013942B1 (fr) 1979-01-17 1980-01-17 Pompe centrifuge pour liquides contenant des matières solides

Country Status (3)

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EP (1) EP0013942B1 (fr)
AT (1) ATE8924T1 (fr)
DE (1) DE2901638B1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4327425A1 (de) * 1992-09-14 1994-03-17 Klein Schanzlin & Becker Ag Lagerung
DE19638080A1 (de) * 1996-09-19 1998-03-26 Uts Umwelt Technik Sued Gmbh Pumpe
RU2113274C1 (ru) * 1996-06-17 1998-06-20 Владимир Павлович Грудинин Устройство для перекачивания и обработки влажной волокнистой массы
SE520740C2 (sv) * 1998-06-30 2003-08-19 Abs Pump Prod Ab Centrifugalpump
DE19961196A1 (de) * 1999-12-18 2001-06-28 Erich Stallkamp Pumpe, insbesondere Kreiselpumpe für Dickstoffe
NO311105B1 (no) * 2000-02-24 2001-10-08 Hamworthy Kse As Sentrifugalpumpe
DE602005013688D1 (de) 2004-12-03 2009-05-14 Brinkmann Pumpen K H Brinkmann Pumpe mit schneidlaufrad
CN103727055B (zh) * 2013-12-13 2016-06-22 山西临龙泵业有限公司 单极单吸双叶道高压泵
CN115059619B (zh) * 2022-08-16 2022-12-23 服务型制造研究院(杭州)有限公司 一种工业泵

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE526779C (de) * 1931-06-10 Armaturen & Maschinenfabrik Ak Kreiselpumpe
DE334496C (de) * 1920-06-04 1921-03-14 Luftverwertungs Ges M B H Kreiselpumpe fuer Saeuren
GB539172A (en) * 1939-05-25 1941-08-29 Nash Engineering Co Pump
GB922319A (en) * 1960-03-28 1963-03-27 Klaus Franz Centrifugal pump
DE1276450B (de) * 1961-01-09 1968-08-29 Loewe Pumpenfabrik G M B H Kreiselpumpe, insbesondere Heizungsumwaelzpumpe
GB1024890A (en) * 1964-01-03 1966-04-06 Wynstruments Ltd Improvements in centrifugal pump units

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Rührmixpumpe RSD/RED2 Gascoigne/Südstall *

Also Published As

Publication number Publication date
EP0013942A2 (fr) 1980-08-06
EP0013942A3 (en) 1980-08-20
DE2901638B1 (de) 1979-08-30
ATE8924T1 (de) 1984-08-15
DE2901638C2 (fr) 1980-08-14

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