EP0595764B1 - Pompe à engrenages - Google Patents

Pompe à engrenages Download PDF

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Publication number
EP0595764B1
EP0595764B1 EP93810658A EP93810658A EP0595764B1 EP 0595764 B1 EP0595764 B1 EP 0595764B1 EP 93810658 A EP93810658 A EP 93810658A EP 93810658 A EP93810658 A EP 93810658A EP 0595764 B1 EP0595764 B1 EP 0595764B1
Authority
EP
European Patent Office
Prior art keywords
gear pump
accordance
inlet
pump
sectional area
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
EP93810658A
Other languages
German (de)
English (en)
Other versions
EP0595764A1 (fr
Inventor
Felix Streiff
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.)
Sulzer Chemtech AG
Original Assignee
Sulzer Chemtech 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
Application filed by Sulzer Chemtech AG filed Critical Sulzer Chemtech AG
Publication of EP0595764A1 publication Critical patent/EP0595764A1/fr
Application granted granted Critical
Publication of EP0595764B1 publication Critical patent/EP0595764B1/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
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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

Definitions

  • the invention relates to a gear pump according to the preamble of claim 1.
  • the invention further relates to pump systems with such a gear pump and to the use of the gear pump, in particular for discharging highly viscous media from a vacuum against a high delivery pressure.
  • the enlargement in the inlet can extend as far as the level of the gearwheel axes, and the length R of the enlargement can be at least 10% greater than the length D of the gearwheel pair.
  • the enlargement of the inlet area can have a width C in the gearwheels which is larger than the tooth width T, for example by at least 10%.
  • Favorable inlet geometries can be further achieved by a ratio of inlet diameter B to inlet depth L of at least 2 and by a ratio of extension length R to inlet depth L, which is greater than 1.85.
  • a funnel-shaped inlet area can advantageously have an opening angle W of at least 55 °.
  • a cost-effective modular design with pumps according to the invention is possible by, for example, different tooth sizes with an adapted inlet area in the same housing and outlet diameter can be used.
  • the outlet diameter A can be set appropriately using an insert sleeve.
  • a particularly powerful pumping and mixing system is formed with a gear pump according to the invention combined with a downstream static mixing element.
  • a simple and efficient pumping and degassing system is formed with a gear pump according to the invention combined with a degassing chamber for the discharge of highly viscous media from the degassing chamber with high delivery pressure.
  • the gear pump 1 has an inlet 4, an outlet 6 and a pair of gearwheels 2 in a housing 3.
  • the inlet 4 has an extension 10 which extends down to the plane 11 of the gearwheel axes 12.
  • 1c shows the cross-sectional area FZ of the gear wheels 2, in the form of a rectangle D x T with length D and width T of the gear pair.
  • the extension 10 with the cross-sectional area FE has a length R and a width C.
  • the shape of the extension is made up of funnel-shaped or conical and flat boundary surfaces.
  • the funnel-shaped part of the inlet has an opening angle W, with an inlet diameter D in the upper flange plane 14.
  • the cross-sectional area FE of the extension (in the region of the gearwheel axes) is larger than that of the gearwheels FZ and the diagonal D3 is in accordance with claim 1
  • Gear cross-sectional area FZ is always smaller than the inlet diameter B.
  • both the length R and the width C of the extension FE are greater than the corresponding length D and the width T of the gear cross-sectional area FZ.
  • FIG. 3 and 4 show further examples of cross-sectional areas FE.
  • the cross-sectional area 32 in FIG. 3 is likewise rectangular like the gearwheel cross-sectional area FZ.
  • the cross-sectional area 33 of FIG. 4 shows, as a further advantageous example, a rounded, crescent-shaped extension 33 in the area of the external teeth of the gear pair 2.
  • the cross-sectional area FA is also shown in FIG. 4, which is formed by the center distance Z and tooth width T.
  • the outlet diameter A should then essentially correspond to the diagonal D4 of this cross-sectional area FA.
  • the ratio of outlet diameter A to Diagonal D4 is preferably in the range 0.9 to 1.1.
  • FIG. 5 and 6 show further examples of the vertical course of the extension 10.
  • the extension 10 first runs vertically downward and then bends into the axis plane 11 with a curve 34.
  • the extension 10 tapers, delimited by the offset oblique planes 35, to the axis plane 11.
  • FIG. 8 shows a system for pumping, mixing and degassing polymer melts, for example of PE, PS or PMMA, with an inlet 21, a degassing chamber 25, a pump 1 according to the invention, which pumps into a static mixing element 20 and with an outlet 24 a vapor outlet 22, solvents and monomers are removed from the degassing chamber 25.
  • Additives 26, for example, can be added to the mixer 20 via a further access be fed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Claims (14)

  1. Pompe à engrenages, notamment pour évacuer des milieux hautement visqueux d'un vide contre une pression de refoulement élevée, avec une paire de roues dentées (2) et une zone d'entrée et de sortie dans un boîtier, l'entrée (4) présentant un élargissement (10) qui s'étend au moins jusqu'au plan (11) des axes de roues dentées (12), la longueur R de cet élargissement, parallèle au plan des axes de roues dentées et perpendiculaire aux axes des roues dentées étant plus grande que la longueur D de la paire de roues dentées, caractérisée en ce que l'élargissement (10) dans les roues dentées (2) en direction des axes de roues dentées (12) a une largeur C qui est plus grande que la largeur de dent T.
  2. Pompe à engrenages selon la revendication 1, caractérisée en ce que la face de section transversale de la zone d'entrée diminue dans la direction d'écoulement, le diamètre (B) au début de l'entrée étant plus grand que la diagonale (D3) de la face de section transversale rectangulaire (FZ) des roues dentées.
  3. Pompe à engrenages selon la revendication 1 ou 2, caractérisée en ce que la longueur R de l'élargissement (10) est au moins 10 % plus grande que la longueur D de la paire de roues dentées.
  4. Pompe à engrenages selon l'une des revendications précédentes, caractérisée en ce que la largeur d'entrée C est au moins 10 % plus grande que la largeur de dent T.
  5. Pompe à engrenages selon l'une des revendications précédentes, caractérisée en ce que le rapport du diamètre d'entrée (B) à la profondeur d'entrée (L) est au moins de 2.
  6. Pompe à engrenages selon l'une des revendications précédentes, caractérisée en ce que le rapport de la longueur d'élargissement (R) à la profondeur d'entrée (L) est plus grand que 1,85.
  7. Pompe à engrenages selon l'une des revendications précédentes, caractérisée par une zone d'entrée en forme d'entonnoir (4) avec un angle d'ouverture (W) de l'entonnoir d'au moins 55°.
  8. Pompe à engrenages selon l'une des revendications précédentes, caractérisée en ce que le rapport de la largeur (T) à l'entraxe (Z) des roues dentées (2) est compris entre 0,9 et 1,3.
  9. Pompe à engrenages selon l'une des revendications précédentes, caractérisée en ce que le rapport du diamètre de sortie A à la diagonale D4 de la face de section transversale FA est compris entre 0,9 et 1,1, la face de section transversale FA étant définie par la largeur de dent T et l'entraxe Z.
  10. Pompe à engrenages selon l'une des revendications précédentes, caractérisée en ce que le diamètre de sortie A est défini par un manchon d'insertion (15).
  11. Installation de pompage et de mélange avec une pompe à engrenages (1) selon l'une des revendications précédentes, à laquelle est monté en aval un élément de mélange statique (20).
  12. Installation de pompage et de dégazage avec une pompe à engrenages (1) selon l'une des revendications 1 à 10 pour l'évacuation de milieux hautement visqueux d'une chambre de dégazage (25) avec une pression de refoulement élevée.
  13. Utilisation d'une pompe à engrenages (1) selon l'une des revendications 1 à 10, pour l'évacuation de milieux hautement visqueux d'un vide contre une pression de refoulement élevée.
  14. Utilisation d'une pompe à engrenages (1) selon l'une des revendications 1 à 10 pour transporter et dégazer des produits de fusion de polymères, par exemple de PE, PS, PMMA, d'une chambre de dégazage (25) dans un élément de mélange statique (20).
EP93810658A 1992-10-29 1993-09-20 Pompe à engrenages Expired - Lifetime EP0595764B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH337992 1992-10-29
CH3379/92 1992-10-29

Publications (2)

Publication Number Publication Date
EP0595764A1 EP0595764A1 (fr) 1994-05-04
EP0595764B1 true EP0595764B1 (fr) 1997-10-29

Family

ID=4254688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93810658A Expired - Lifetime EP0595764B1 (fr) 1992-10-29 1993-09-20 Pompe à engrenages

Country Status (5)

Country Link
US (1) US5388974A (fr)
EP (1) EP0595764B1 (fr)
JP (1) JPH06200881A (fr)
DE (1) DE59307598D1 (fr)
ES (1) ES2110077T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007011644B4 (de) * 2006-03-10 2016-01-14 Robert Bosch Gmbh Hydrostatische Kolbenmaschine in Axialkolbenbauweise mit einem Kombi-Pumpengehäuse für mehrere Triebwerks Nenngrößen und verschiedene Hilfspumpen

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19635706C2 (de) * 1996-09-03 1998-12-03 Andreas Prof Dr Limper Verfahren zum Plastifizieren, Sieben, Dosieren und Fördern hochviskoser Kautschukmischungen und Einrichtung für die Durchführung des Verfahrens
DE19717295C2 (de) * 1997-04-24 1999-09-23 Danfoss As Fluid-Maschine
JPH11247767A (ja) * 1997-12-23 1999-09-14 Maag Pump Syst Textron Ag 歯車ポンプの軸を位置決めするための方法および歯車ポンプ
DE19825650C2 (de) * 1998-06-09 2001-03-01 Danfoss As Schmierölversorgungseinrichtung für ein Gerät mit rotierender Gerätewelle
ATE235001T1 (de) * 1998-10-01 2003-04-15 Dow Global Technologies Inc Zahnradpumpe für hochviskose flüssigkeiten
DE102006058355A1 (de) * 2006-03-10 2007-09-13 Brueninghaus Hydromatik Gmbh Kombi-Pumpengehäuse für mehrere Nenngrößen
DE202009012158U1 (de) * 2009-09-08 2011-02-03 Hugo Vogelsang Maschinenbau Gmbh Drehkolbenpumpe
DE202010011626U1 (de) 2010-08-20 2010-10-21 Hugo Vogelsang Maschinenbau Gmbh Drehkolbenpumpe
US20140323792A1 (en) * 2013-04-25 2014-10-30 Mp Associates, Inc. Desensitizing explosive materials using a vacuum vessel
WO2015048984A1 (fr) * 2013-10-01 2015-04-09 Dover Pump Solutions Group (Europe) Gmbh Pompe à engrenages pourvue d'une partie d'admission améliorée
US11378076B1 (en) * 2021-01-28 2022-07-05 Shimadzu Corporation Gear pump or motor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531726A (en) * 1946-01-26 1950-11-28 Roper Corp Geo D Positive displacement rotary pump
FR1073834A (fr) * 1952-04-02 1954-09-29 Daimler Benz Ag Compresseur à piston rotatif, en particulier compresseur root pour moteurs à combustion interne
DE1941673A1 (de) * 1969-08-16 1971-02-18 Barmag Barmer Maschf Zahnradpumpe mit keilfoermig verjuengten Einzugskammern
US3837768A (en) * 1973-08-31 1974-09-24 Maag Zahnraeder & Maschinen Ag Gear pump for highly viscous media
US4137023A (en) * 1975-09-03 1979-01-30 Union Carbide Corporation Low energy recovery compounding and fabricating apparatus for plastic materials
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007011644B4 (de) * 2006-03-10 2016-01-14 Robert Bosch Gmbh Hydrostatische Kolbenmaschine in Axialkolbenbauweise mit einem Kombi-Pumpengehäuse für mehrere Triebwerks Nenngrößen und verschiedene Hilfspumpen

Also Published As

Publication number Publication date
DE59307598D1 (de) 1997-12-04
JPH06200881A (ja) 1994-07-19
ES2110077T3 (es) 1998-02-01
EP0595764A1 (fr) 1994-05-04
US5388974A (en) 1995-02-14

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