EP0669465B1 - Dispositif de palier pour pompes pour fluides visqueux - Google Patents

Dispositif de palier pour pompes pour fluides visqueux Download PDF

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Publication number
EP0669465B1
EP0669465B1 EP95107891A EP95107891A EP0669465B1 EP 0669465 B1 EP0669465 B1 EP 0669465B1 EP 95107891 A EP95107891 A EP 95107891A EP 95107891 A EP95107891 A EP 95107891A EP 0669465 B1 EP0669465 B1 EP 0669465B1
Authority
EP
European Patent Office
Prior art keywords
bearing
pump
return
channels
bores
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 - Lifetime
Application number
EP95107891A
Other languages
German (de)
English (en)
Other versions
EP0669465A3 (fr
EP0669465A2 (fr
Inventor
Peter Dipl. Ing. Blume
Roger Dr. Ing. Stehr
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.)
Maag Pump Systems AG
Original Assignee
Maag Pump Systems AG
Maag Pump Systems Textron AG
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 DE59501083T priority Critical patent/DE59501083D1/de
Priority to AT95107891T priority patent/ATE161075T1/de
Priority to ES95107891T priority patent/ES2110799T3/es
Priority to EP95107891A priority patent/EP0669465B1/fr
Application filed by Maag Pump Systems AG, Maag Pump Systems Textron AG filed Critical Maag Pump Systems AG
Publication of EP0669465A2 publication Critical patent/EP0669465A2/fr
Publication of EP0669465A3 publication Critical patent/EP0669465A3/fr
Priority to AU53304/96A priority patent/AU5330496A/en
Priority to US08/952,649 priority patent/US6123531A/en
Priority to JP8535234A priority patent/JPH11505910A/ja
Priority to PCT/CH1996/000164 priority patent/WO1996037705A1/fr
Application granted granted Critical
Publication of EP0669465B1 publication Critical patent/EP0669465B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C15/0038—Shaft sealings specially adapted for rotary-piston machines or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/001—Pumps for particular liquids
    • F04C13/002—Pumps for particular liquids for homogeneous viscous liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0088—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/56—Bearing bushings or details thereof

Definitions

  • the present invention relates to a bearing arrangement for a pump shaft for conveying Newtonian or non-Newtonian liquids with different viscosities with a bearing for the shaft, a gear pump and a method for collecting and returning leakage liquid passing through a bearing when pumping liquids with different viscosities.
  • a batchwise or batchwise polymerization can be carried out for process engineering reasons.
  • a gear pump are used.
  • very low-viscosity liquid first enters the pump, which means that there is an extremely low pressure difference in the pump.
  • the pump conveys high to medium-viscosity melt against downstream pressure consumers, such as filters, extrusion tools and the like, which means that the pump has to deliver against a significantly higher pressure difference.
  • the differential pressure across the pump is sufficiently high to cause a sufficient lubrication flow or leakage flow through the bearings and through the return channel system to the suction side of the pump.
  • the differential pressure is very low, albeit sufficient for the low-viscosity, fluid medium.
  • the differential pressure is very low, albeit sufficient for the low-viscosity, fluid medium.
  • the switchover there is still highly viscous liquid in the return system, which highly viscous medium can only be replaced very slowly by the new low-viscosity liquid after the switchover due to the low differential pressure.
  • a stagnation of the bearing leakage current poses the potential risk of undersupply of the bearing, whereby there is a risk of damage to the bearing.
  • the task is to ensure the leakage lubrication when switching from the conveyance of a highly viscous medium to the conveyance of a low-viscosity medium, that is to say that a strongly impeded flow or even a blockage of the return arrangement for the low-viscosity fluid is prevented.
  • the return duct system of a pump proposed for the conveyance of liquids with different viscosities has at least one catchment or relief zone either on the rear of the bearing or on both pump covers, for collecting leakage fluid passing through the bearing along the shaft, which is also responsible for lubricating the bearing.
  • the return system has at least two return channels or bores from each of the collecting or relief zones in order to return the collected leakage liquid to the suction side of the pump.
  • At least one of the channels or bores can be closed, which makes it possible, depending on the viscosity of the medium to be pumped, to close one of the bores, or to keep all bores or return channels open. If high-viscosity media are fed, the hole for the low-viscosity medium should be closed; if the low-viscosity medium or product is pumped, the hole for the low-viscosity medium must be open. In the latter case, the flow resistance ratio is such that the return hole for the high-viscosity product appears to the low-viscosity product to be closed.
  • the return hole closer to the back of the bearing or the low-pressure side is preferably reserved for the return of the low-viscosity liquid.
  • this closer return hole is opened after switching from the conveyance of a highly viscous medium to the conveyance of the low-viscosity medium, which return channel is not "blocked" by the highly viscous medium.
  • this closer return channel is opened after switching to polymerization or circulation mode.
  • the polymerization increases the viscosity in the polyester to be circulated, and after reaching a certain viscosity or after reaching a certain differential pressure or after switching back to extrusion operation, the nearer return duct is closed again so that no highly viscous material can enter it.
  • This closer return hole can be closed and opened hydraulically, pneumatically or by electric motor, for example using a stepper motor. Whether the shorter return channel ultimately runs through the slide bearing or through the housing surrounding the slide bearing is, for example, of the geometrical type Conditions dependent. In any case, both versions are possible.
  • return channels of the same type at least along a common section, i.e. return channels for low-viscosity media can be combined and return channels for high-viscosity media.
  • a bearing of a drive shaft 1 of a gear pump is shown schematically in longitudinal section, running through a housing wall 7.
  • a gear 5 is arranged on the shaft 1 in the pump chamber 3 in order to convey a viscous liquid in the direction of arrow A.
  • the shaft 1 is supported in a slide bearing 9, through which bearing, along the shaft 1, in the intermediate space 10 due to the high pressure in the pump chamber 3, the medium to be pumped is driven.
  • This so-called Leakage liquid also serves to lubricate the slide bearing 9.
  • a collecting or annular space 11 is arranged on the rear of the slide bearing 9 in order to collect the leakage liquid passing through the slide bearing 9.
  • this collecting or annular space 11 is connected to the suction side of the pump space 3 via two return channels 13 and 15.
  • a valve 17 is also provided, for example.
  • FIG. 2 shows, analogously, in longitudinal section a further embodiment variant of a bearing according to the invention or a return arrangement, the collecting or annular space 11 now being arranged at least partially inside the rear of the sliding bearing 9.
  • the two return channels 13 and 15 are again arranged peripherally from this annular space 11, running outwards, with the result that at least the branch 13a or 15a of each return channel, which runs perpendicular to the shaft 1, appears as lying one on top of the other.
  • the two return duct sections 13a and 15a can also be guided independently of one another in this area, or they can be combined. This is because sections 13a and 15a can be very short. In contrast, the return holes 13 and 15, which are comparatively long, must be guided separately.
  • FIG. 3 shows an arrangement similar to that in FIG. 2, but the return duct sections 13a and 15a are guided in the cover 8 of the pump.
  • These return channel sections 13a and 15a can be formed, for example, by a so-called V-groove.
  • This V-groove or V-grooves open into the two return bores 13 and 15, for example one behind the other, which is why they are not shown in the illustration according to FIG separately drilled holes appear.
  • a sealing arrangement 16 is shown in the cover 8 in FIG. 3.
  • FIGS. 1-4 are of course only examples which can be modified, modified or supplemented in any manner. So it is of course possible to arrange further return channels and, in the case of several return channels, also to design more than one return channel to be closable. This can be useful, for example, if the viscosities of the different liquids to be pumped differ greatly.
  • the sealability of the return channels can also be achieved in various ways, but this is know-how which is known per se and cannot be explained in more detail here. It is also in itself immaterial whether the return channels are partially passed through the bearings themselves or through the housing wall. Finally, it should be pointed out that the illustration of the sealing arrangement adjacent to the collecting or annular space has been omitted in the figures, since this is not part of the present invention.
  • the discharge or return system has at least two return channels or bores, on each pump side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Sliding-Contact Bearings (AREA)

Claims (11)

  1. Arrangement des paliers pour un arbre à pompe (1) pour le transport de fluides newtoniens ou non-newtoniens de différentes viscosités, avec un palier pour l'arbre, caractérisé par:
    - au moins une zone de captage ou de décharge (11) arrangée sur le côté basse pression du palier pour capter le fluide d'infiltration qui pénètre le long de l'arbre au travers du palier (9) et
    - au moins deux canaux ou trous de retour (13, 15) qui raccordent la zone de captage ou de décharge (11) au côté aspiration de la pompe afin de renvoyer le fluide d'infiltration capté.
  2. Arrangement des paliers suivant la revendication 1, caractérisé en ce qu'au moins un des canaux ou trous peut être fermé.
  3. Arrangement des paliers suivant les revendications 1 ou 2, caractérisé en ce que les canaux ou trous sont formés pour être fermés indépendamment l'un de l'autre.
  4. Arrangement des paliers suivant les revendications 1 à 3, caractérisé en ce que les canaux ou trous ont différents diamètres ou coupes transversales.
  5. Arrangement des paliers suivant la revendication 1 à 4, caractérisé en ce que la zone de captage ou de décharge est formée par au moins une chambre annulaire (11) adjacente à l'arbre.
  6. Arrangement des paliers suivant les revendications 1 à 5, caractérisé en ce qu'au moins une chambre annulaire (11) est arrangée à l'arrière ou du côté basse pression pour passer au moins partiellement dans le corps des paliers lisses (9) ou sur ou dans le capot de la pompe (8) et au moins un des canaux ou trous de retour (13) est arrangé pour passer au moins partiellement au travers ou le long du (des) logement(s) de paliers lisses.
  7. Pompe à engrenages avec un arrangement des paliers ou plus suivant les revendications 1 à 6.
  8. Pompe à engrenages suivant la revendication 7, caractérisée en ce que dans chaque cas chaque paire de canaux ou trous de retour similaires (13', 13" et 15', 15") est composée au moins partiellement de deux paliers (9', 9") arrangés l'un à côté de l'autre dans la paroi du logement de pompe ou dispose d'une section commune (19, 21).
  9. Procédé pour capter le fluide d'infiltration qui pénètre au travers d'un arrangement de paliers suivant les revendications 1 à 6 dans un palier lisse de pompe et renvoyer le fluide d'infiltration dans des pompes pour fluides de différentes viscosités, caractérisé en ce que du fluide d'infiltration d'une certaine viscosité pénétrant au travers du palier le long de l'arbre est capté à l'arrière ou du côté basse pression du palier dans une zone de captage ou de décharge et est renvoyé par au moins un des canaux de retour, pendant qu'au moins un des autres canaux de retour reste fermé quand une différence de pression préréglée dans la pompe est atteinte ou dépassée.
  10. Procédé suivant la revendication 9, caractérisé en ce que pendant le transport de substances de viscosité élevée au moins un des canaux de retour reste fermé, et pendant le transport de substances de faible viscosité, à savoir inférieure à une différence de pression préréglée dans la pompe, au moins un des autres canaux fermés est ouvert afin d'assurer le retour de la substance de faible viscosité de la zone de captage au côté aspiration de la pompe.
  11. Procédé suivant les revendications 9 ou 10, caractérisé en ce que les substances de faible viscosité sont renvoyées au travers du canal (canaux) de retour le(s) plus proche(s) de l'arrière ou côté basse pression du palier, à savoir de préférence le canal (ou les canaux) le(s) plus proches de l'arrière du palier est (sont) désigné(s) comme pouvant être fermé(s).
EP95107891A 1995-05-24 1995-05-24 Dispositif de palier pour pompes pour fluides visqueux Expired - Lifetime EP0669465B1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE59501083T DE59501083D1 (de) 1995-05-24 1995-05-24 Lageranordnung für eine Pumpenwelle einer Pumpe für das Fördern von Medien mit unterschiedlicher Viskosität
AT95107891T ATE161075T1 (de) 1995-05-24 1995-05-24 Lageranordnung für eine pumpenwelle einer pumpe für das fördern von medien mit unterschiedlicher viskosität
ES95107891T ES2110799T3 (es) 1995-05-24 1995-05-24 Disposicion de cojinete para un eje de una bomba para impeler medios con diferente viscosidad.
EP95107891A EP0669465B1 (fr) 1995-05-24 1995-05-24 Dispositif de palier pour pompes pour fluides visqueux
AU53304/96A AU5330496A (en) 1995-05-24 1996-04-29 Bearing system for the shaft of a pump for conveying media f differing viscosity
PCT/CH1996/000164 WO1996037705A1 (fr) 1995-05-24 1996-04-29 Systeme de palier pour l'arbre d'une pompe servant a refouler des substances de differentes viscosites
US08/952,649 US6123531A (en) 1995-05-24 1996-04-29 Bearing arrangement for a pump shaft of a pump for delivering media of different viscosities
JP8535234A JPH11505910A (ja) 1995-05-24 1996-04-29 粘性の異なる媒体を搬送するためのポンプのポンプ軸用の軸受装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95107891A EP0669465B1 (fr) 1995-05-24 1995-05-24 Dispositif de palier pour pompes pour fluides visqueux

Publications (3)

Publication Number Publication Date
EP0669465A2 EP0669465A2 (fr) 1995-08-30
EP0669465A3 EP0669465A3 (fr) 1995-12-20
EP0669465B1 true EP0669465B1 (fr) 1997-12-10

Family

ID=8219282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95107891A Expired - Lifetime EP0669465B1 (fr) 1995-05-24 1995-05-24 Dispositif de palier pour pompes pour fluides visqueux

Country Status (8)

Country Link
US (1) US6123531A (fr)
EP (1) EP0669465B1 (fr)
JP (1) JPH11505910A (fr)
AT (1) ATE161075T1 (fr)
AU (1) AU5330496A (fr)
DE (1) DE59501083D1 (fr)
ES (1) ES2110799T3 (fr)
WO (1) WO1996037705A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6544008B1 (en) * 1997-07-18 2003-04-08 John K. Apostolides Internal vent for reducing seal pressure in prelubrication pump assembly
US7137789B2 (en) * 1997-07-18 2006-11-21 Rpm Industries, Inc. Vent for reducing seal pressure in pump assembly
DE19833374B4 (de) * 1998-07-24 2007-03-22 Zf Friedrichshafen Ag Verdrängerpumpe
DE19835122A1 (de) * 1998-08-04 2000-02-10 Zahnradfabrik Friedrichshafen Verdrängerpumpe
DE10014548A1 (de) * 2000-03-23 2001-09-27 Bosch Gmbh Robert Zahnradförderpumpe
DE10031470A1 (de) 2000-06-28 2002-01-10 Krupp Werner & Pfleiderer Gmbh Zahnradpumpe
US6685453B2 (en) 2001-06-14 2004-02-03 Parker-Hannifin Corporation Fluid transfer machine with drive shaft lubrication and cooling
EP1855007A1 (fr) * 2006-05-12 2007-11-14 Maag Pump Systems Textron AG Pompe à engrenages
KR100947715B1 (ko) * 2007-05-07 2010-03-16 나종갑 잉크 이송용 기어 펌프
WO2010035916A1 (fr) * 2008-09-25 2010-04-01 Jong-Gap Na Pompe possédant un trajet de dérivation
EP2588756B1 (fr) * 2010-07-02 2018-05-02 Oerlikon Textile GmbH & Co. KG Pompe à engrenages
DE102014111721A1 (de) 2014-08-18 2016-02-18 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Fluidbeaufschlagungsvorrichtung für ein Getriebe für ein Kraftfahrzeug
DE102016225847A1 (de) * 2016-12-21 2018-06-21 Robert Bosch Gmbh Fluidpumpe für ein Abwärmerückgewinnungssystem
US11143183B2 (en) 2019-03-26 2021-10-12 Hamilton Sundstrand Corporation Gear pump bearing with hybrid pad shutoff
EP3862532A1 (fr) * 2020-02-07 2021-08-11 Fluid-O-Tech S.r.l. Pompe destinée en particulier à pomper un liquide tel que de l'encre, de la peinture, de la colle ou analogue
US11703050B2 (en) * 2020-09-08 2023-07-18 Eaton Intelligent Power Limited Gear pump with self-lubricating bearings

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DE544963C (de) * 1932-02-24 Pfeiffer Arthur Wellenabdichtung fuer Vakuumpumpen, insbesondere mit Drehkolben
FR572694A (fr) * 1923-11-06 1924-06-11 Perfectionnement aux pompes rotatives
DE442185C (de) * 1925-11-29 1927-03-22 Wolfgang Gaede Dr Einrichtung fuer Vakuum-Drehkolbenpumpen mit OElabschluss zur Verhinderung des OEleintritts in die Vakuumleitung beim Stillstand der Pumpe
GB1554262A (en) * 1975-06-24 1979-10-17 Kayaba Industry Co Ltd Gear pump
GB1572467A (en) * 1977-02-01 1980-07-30 Hamworthy Hydraulics Ltd Gear pumps
DE3135037A1 (de) * 1980-09-12 1982-09-23 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid "austragspumpe"
JPS5773883A (en) * 1980-10-27 1982-05-08 Katsuya Ishizaki Oil leakage preventing method for rotary pump
US4392798A (en) * 1981-04-03 1983-07-12 General Signal Corporation Gear pump or motor with low pressure bearing lubrication
GB2102074B (en) * 1981-07-18 1985-01-30 Dowty Group Services Positive-displacement fluid-machines
US4737087A (en) * 1984-12-10 1988-04-12 Barmag Ag Drive shaft seal for gear pump and method
GB2169350B (en) * 1985-01-05 1989-06-21 Hepworth Plastics Ltd Gear pumps
EP0558888B1 (fr) * 1992-03-06 1996-09-11 HERMANN BERSTORFF Maschinenbau GmbH Dispositif pour le traitement de caoutchouc ou de matière synthétique thermoplastique hautement visqueux
DE59308641D1 (de) * 1992-10-28 1998-07-09 Maag Pump Systems Ag Verfahren und Stufe zur Behandlung einer Thermoplastschmelze mit einer Zahnradpumpe
US5641281A (en) * 1995-11-20 1997-06-24 Lci Corporation Lubricating means for a gear pump
DE59608091D1 (de) * 1996-02-09 2001-12-13 Maag Pump Systems Textron Ag Z Zahnradpumpe

Also Published As

Publication number Publication date
ES2110799T3 (es) 1998-02-16
EP0669465A3 (fr) 1995-12-20
JPH11505910A (ja) 1999-05-25
DE59501083D1 (de) 1998-01-22
AU5330496A (en) 1996-12-11
US6123531A (en) 2000-09-26
EP0669465A2 (fr) 1995-08-30
ATE161075T1 (de) 1997-12-15
WO1996037705A1 (fr) 1996-11-28

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