EP0677660B1 - Zahnradpumpe und deren Verwendung - Google Patents

Zahnradpumpe und deren Verwendung Download PDF

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Publication number
EP0677660B1
EP0677660B1 EP94105347A EP94105347A EP0677660B1 EP 0677660 B1 EP0677660 B1 EP 0677660B1 EP 94105347 A EP94105347 A EP 94105347A EP 94105347 A EP94105347 A EP 94105347A EP 0677660 B1 EP0677660 B1 EP 0677660B1
Authority
EP
European Patent Office
Prior art keywords
recess
gear pump
pump according
rotors
product
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
EP94105347A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0677660A1 (de
Inventor
Roger Dr.-Ing. Stehr
Peter Blume
Marco Benetti
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
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8215838&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0677660(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to ES94105347T priority Critical patent/ES2087780T3/es
Priority to DE59400284T priority patent/DE59400284D1/de
Priority to DK94105347.2T priority patent/DK0677660T3/da
Priority to EP94105347A priority patent/EP0677660B1/de
Priority to AT94105347T priority patent/ATE138159T1/de
Application filed by Maag Pump Systems AG filed Critical Maag Pump Systems AG
Priority to JP7081365A priority patent/JPH07279861A/ja
Priority to US08/417,853 priority patent/US5547356A/en
Publication of EP0677660A1 publication Critical patent/EP0677660A1/de
Publication of EP0677660B1 publication Critical patent/EP0677660B1/de
Application granted granted Critical
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
    • 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
    • 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
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/088—Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement

Definitions

  • the present invention relates to a gear pump according to the preamble of claim 1 and its use.
  • EP-A-0 559 582 in which a volume-increasing relief is provided on the pressure side of the product channel.
  • the product channel 1 is shown, cut along its axis A and parallel to axis B one of the two provided, not shown, externally intermeshing rotors.
  • the comb area of the rotors is essentially in the section plane E of the selected representation. Furthermore, it is symmetrical with respect to a plane through the axis B and the axis, not shown here, of the second rotor lying above it in the selected illustration.
  • the inlet channel la faces both on the inlet side, as shown, for example, and on the outlet side, i.e. facing the outlet duct 1b, into the product duct wall 3 of the product duct 1, in which the rotors mesh, each with a volume-increasing recess 6a1, a2 formed, preferably as shown with 6b1 and 6b2, on both sides opposite each other above the product duct 1.
  • the delivery medium can release pressure into the provided recesses 6, which prevents the occurrence of high pinching pressure peaks and improves the filling behavior of the tooth gaps on the inlet channel side.
  • the recesses 6a, b are arranged in pairs symmetrically to the plane E B , which runs through the two axes B of the rotor shafts.
  • bearing bodies 7 are provided in the pump housing, as shown in broken lines with respect to the one journal.
  • the recesses 6 according to the invention are then, depending on their extension, continuous from the wall area of the product channel defined by the pump housing into that defined by the end face of the bearing body 7 Continuous wall area of said channel, formed.
  • recesses 6a1 or 6a2, 6b1 or 6b2 are incorporated so that they each have the shape of spherical segments.
  • the recesses define spherical spherical caps in pairs, or more generally, continuously curved room surfaces.
  • a gear pump according to the invention is excellently suited for the conveyance of shear-sensitive and / or thermosensitive media, in particular of polymer melts, such as PVC, rubber or biopolymers. But it is also for suitable for the promotion of foodstuffs for which there are similarly high requirements with regard to freedom from dead space as for the melts mentioned

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP94105347A 1994-04-07 1994-04-07 Zahnradpumpe und deren Verwendung Expired - Lifetime EP0677660B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE59400284T DE59400284D1 (de) 1994-04-07 1994-04-07 Zahnradpumpe und deren Verwendung
DK94105347.2T DK0677660T3 (da) 1994-04-07 1994-04-07 Tandhjulspumpe og dennes anvendelse
EP94105347A EP0677660B1 (de) 1994-04-07 1994-04-07 Zahnradpumpe und deren Verwendung
AT94105347T ATE138159T1 (de) 1994-04-07 1994-04-07 Zahnradpumpe und deren verwendung
ES94105347T ES2087780T3 (es) 1994-04-07 1994-04-07 Bomba de engranajes.
JP7081365A JPH07279861A (ja) 1994-04-07 1995-04-06 歯車ポンプ及び該歯車ポンプを使用する方法
US08/417,853 US5547356A (en) 1994-04-07 1995-04-07 Gear pump and method of using same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94105347A EP0677660B1 (de) 1994-04-07 1994-04-07 Zahnradpumpe und deren Verwendung

Publications (2)

Publication Number Publication Date
EP0677660A1 EP0677660A1 (de) 1995-10-18
EP0677660B1 true EP0677660B1 (de) 1996-05-15

Family

ID=8215838

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94105347A Expired - Lifetime EP0677660B1 (de) 1994-04-07 1994-04-07 Zahnradpumpe und deren Verwendung

Country Status (7)

Country Link
US (1) US5547356A (da)
EP (1) EP0677660B1 (da)
JP (1) JPH07279861A (da)
AT (1) ATE138159T1 (da)
DE (1) DE59400284D1 (da)
DK (1) DK0677660T3 (da)
ES (1) ES2087780T3 (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10135709C1 (de) * 2001-07-21 2003-02-13 Hartmut Hasse Universelle zwangsgeschmierte Gleitlagerung für eine Zahnradpumpe

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE138159T1 (de) * 1994-04-07 1996-06-15 Maag Pump Systems Ag Zahnradpumpe und deren verwendung
CA2343238C (en) * 1998-10-01 2007-07-10 The Dow Chemical Company High efficiency gear pump for pumping highly viscous fluids
US6179594B1 (en) 1999-05-03 2001-01-30 Dynisco, Inc. Air-cooled shaft seal
US6213745B1 (en) 1999-05-03 2001-04-10 Dynisco High-pressure, self-lubricating journal bearings

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE366152C (de) * 1922-12-30 Bbc Brown Boveri & Cie Einrichtung zur Vermeidung der Quetschwirkung bei Zahnrad-OElpumpen
US3113524A (en) * 1961-12-26 1963-12-10 Roper Hydraulics Inc Gear pump with trapping reliefs
US3303792A (en) * 1964-04-20 1967-02-14 Roper Ind Inc Gear pump with trapping reliefs
DE2510496C3 (de) * 1975-03-11 1978-07-20 Robert Bosch Gmbh, 7000 Stuttgart Zahnradmaschine (Pumpe oder Motor)
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
IT1238912B (it) * 1990-04-26 1993-09-07 Fiatgeotech Pompa ad ingranaggi.
US5190450A (en) * 1992-03-06 1993-03-02 Eastman Kodak Company Gear pump for high viscosity materials
ATE138159T1 (de) * 1994-04-07 1996-06-15 Maag Pump Systems Ag Zahnradpumpe und deren verwendung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10135709C1 (de) * 2001-07-21 2003-02-13 Hartmut Hasse Universelle zwangsgeschmierte Gleitlagerung für eine Zahnradpumpe

Also Published As

Publication number Publication date
ES2087780T3 (es) 1996-07-16
DK0677660T3 (da) 1996-06-03
DE59400284D1 (de) 1996-06-20
US5547356A (en) 1996-08-20
JPH07279861A (ja) 1995-10-27
ATE138159T1 (de) 1996-06-15
EP0677660A1 (de) 1995-10-18

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