EP0696679A1 - Pompe à engrenages pour le refoulement de laque - Google Patents

Pompe à engrenages pour le refoulement de laque Download PDF

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Publication number
EP0696679A1
EP0696679A1 EP95110689A EP95110689A EP0696679A1 EP 0696679 A1 EP0696679 A1 EP 0696679A1 EP 95110689 A EP95110689 A EP 95110689A EP 95110689 A EP95110689 A EP 95110689A EP 0696679 A1 EP0696679 A1 EP 0696679A1
Authority
EP
European Patent Office
Prior art keywords
shaft
bore
gear pump
gear
pump according
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
EP95110689A
Other languages
German (de)
English (en)
Other versions
EP0696679B1 (fr
Inventor
Herbert Nussbaum
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.)
ABB Patent GmbH
Original Assignee
ABB Patent 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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0696679A1 publication Critical patent/EP0696679A1/fr
Application granted granted Critical
Publication of EP0696679B1 publication Critical patent/EP0696679B1/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
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/005—Removing contaminants, deposits or scale from the pump; Cleaning
    • 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
    • F04C2/084—Toothed wheels

Definitions

  • the invention relates to a gear pump for conveying paint, in particular for conveying paint colors for the coating of vehicle parts and bodies, with a housing body in which at least two gear wheels are arranged and which is closed on opposite flat sides by a first and second cover plate, which cover plates have recesses have, which serve as a guide for shafts for the gears, and further recesses, which serve to connect the interior of the housing body with the space outside the housing body.
  • Gear pumps for the conveyance of liquids are known.
  • gears mesh with each other with little play, the fluid being pressed into the pressure chamber by the meshing of the gears.
  • the respective delivery rate per time depends on the speed and the tooth width of the gears.
  • axially continuous recesses are arranged uniformly distributed over the circumference and that each shaft has at least one radial bore, each with an axial bore provided in each shaft in Connection stands for the flow of cleaning fluid.
  • the housing and the gearwheels arranged therein delimit a working space with their teeth.
  • the annular gap with the axial recesses arranged therein as well as the at least one radial bore provided in each shaft and the at least one axial bore connected therewith form the secondary spaces mentioned.
  • the working space, as defined above, and the secondary spaces, also as defined above, are connected to one another by at least one radial bore provided in each gear wheel.
  • the at least one axial bore is advantageously provided in each shaft as a central bore. As a result, influences due to centrifugal forces of the rotating shaft on the flow path of the cleaning fluid flowing through the axial bore are avoided.
  • At least one recess in the cover plate for guiding a shaft is provided with a through opening, which is preferably designed as a bore.
  • This through opening can have a cross section corresponding to the axial bore, but it can also be adapted to the shaft cross section of the associated shaft.
  • Each cover plate is expediently provided with at least one through opening for the associated shaft, with the through opening being aligned with the central bore in the associated shaft in accordance with an advantageous development of the invention.
  • the shaft end of the associated shaft having the axial bore is inserted into the recess in the cover plate provided with a through opening, which in turn can be connected in an expedient development of the invention to a flushing device arranged outside the housing.
  • flushing fluid flows from the flushing device into the washing chamber via the through-opening and from there via the at least one radial bore in the gearwheels into the working chamber and releases and flushes out any colorant residues deposited there.
  • the axial recesses provided in the annular gaps it can be advantageous to form them into the central bore of the assigned gear. According to another embodiment, it can prove to be advantageous if the axial recesses are formed in the annular gap in the associated guide shaft.
  • a combination can also be expedient in which both the shaft and the central bore of the gearwheel are each provided with axial recesses formed therein.
  • two gear wheels 20, 22 are arranged side by side in a recess 24.
  • the recess 24, the cross section of which can be seen from FIG. 3, follows the circumferential contour of the gear wheels 20, 22 and accordingly has an approximately oval cross section, working spaces 26, 28 being formed on both sides of the plane of engagement of the two gear wheels 20, 22.
  • the working spaces 26, 28 are connected to the outside space via fluid channels (not shown in detail) which are guided in a known manner by one of the cover plates 16, 18 and through which the ink application fluid is supplied and removed. These fluid channels each open into one of the working spaces 26, 28.
  • the fluid is conveyed from the one working space 26 into the working space 28 by the rotating gearwheels 20, 22 which are in engagement with one another.
  • gear wheels 20, 22 are each guided by means of shafts 30, 32, each shaft engaging in a recess 34, 36 arranged in the upper cover plate 16 shown here.
  • Each of the shafts 30, 32 is provided with an axial bore 38, 40 and with a radial bore 39, 41 which connects the axial bore 38, 40 to the shaft surface.
  • the axial bores 38, 40 which are designed as central bores, and the radial bores 39, 41 serve as flow channels for cleaning fluid, which is fed, for example, via the axial bore 38, which is connected to the external space, in the first shaft 30 from a flushing device, not shown here .
  • the cleaning fluid flowing in via the axial bore 38 and the radial bore 39 first reaches an annular gap 42 formed between the first shaft 30 and the assigned gear 20, and from here through a radial bore 44 provided in the assigned gear 20.
  • a similar radial bore 46 is in the adjacent one second gear 22 is provided.
  • the second gear wheel 22 which is connected in a rotationally fixed manner to the assigned second shaft 32 via a key-and-groove connection 45, which serves as a drive shaft and is connected for this purpose to a drive motor (not shown here), is also initially used when a color change is carried out Cleaning fluid rinsed.
  • the supplied cleaning fluid passes through the axial bore 40 and radial bore 41 arranged in the second shaft 32 into the annular gap formed between the assigned second gear 22 and the second shaft 32 and from there via the radial bore 46 in the gear 22 finally into one of the working spaces 26, 28 and from here via the fluid channels, not shown, back into the outside space.
  • the annular gap between the respective shaft 30, 32 and the associated gearwheel 20, 22 is enlarged by axial recesses 48 formed regularly on the circumference.
  • FIG. 2 which shows an end view of the gear wheel 20
  • the axial recesses 48 are formed in a uniform arrangement in the central bore 21 thereof.
  • the second gear 22 is formed, with the axial groove for the feather key 45 also being provided here.
  • the axial recesses 48 can also be formed on the shaft 30 passing through the central bore 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP95110689A 1994-07-16 1995-07-08 Pompe à engrenages pour le refoulement de laque Expired - Lifetime EP0696679B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4425226A DE4425226A1 (de) 1994-07-16 1994-07-16 Zahnradpumpe zur Lackförderung
DE4425226 1994-07-16

Publications (2)

Publication Number Publication Date
EP0696679A1 true EP0696679A1 (fr) 1996-02-14
EP0696679B1 EP0696679B1 (fr) 1999-06-16

Family

ID=6523384

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110689A Expired - Lifetime EP0696679B1 (fr) 1994-07-16 1995-07-08 Pompe à engrenages pour le refoulement de laque

Country Status (3)

Country Link
EP (1) EP0696679B1 (fr)
DE (2) DE4425226A1 (fr)
ES (1) ES2134379T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003083306A1 (fr) * 2002-03-29 2003-10-09 Cps Color Equipment S.P.A. Pompe a engrenages interieurs dont les surfaces d'appui comportent des creux
CN102135093A (zh) * 2011-04-13 2011-07-27 姜卫东 直线共轭内啮合齿轮泵

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3855371B2 (ja) * 1997-05-29 2006-12-06 アイシン精機株式会社 オイルポンプ
DK4202181T3 (da) * 2021-12-21 2024-06-10 Mueller A & K Gmbh Co Kg Tandhjulspumpe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR931391A (fr) * 1946-07-03 1948-02-20 Pompes et moteurs à engrenages à pressions équilibrées
EP0061630A1 (fr) * 1981-03-25 1982-10-06 Bayer Ag Pompe à engrenage à dispositif pour nettoyer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1802561A1 (de) * 1968-10-11 1970-05-27 Licentia Gmbh Heisswasser-Umwaelzpumpe
DE8331598U1 (de) * 1983-11-04 1985-04-11 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Zahnradpumpe zur volumetrischen mengendosierung mit einer verbesserten spuelung
CH684954A5 (de) * 1991-02-27 1995-02-15 Maag Pump Systems Ag Zahnradpumpe.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR931391A (fr) * 1946-07-03 1948-02-20 Pompes et moteurs à engrenages à pressions équilibrées
EP0061630A1 (fr) * 1981-03-25 1982-10-06 Bayer Ag Pompe à engrenage à dispositif pour nettoyer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003083306A1 (fr) * 2002-03-29 2003-10-09 Cps Color Equipment S.P.A. Pompe a engrenages interieurs dont les surfaces d'appui comportent des creux
US7048524B2 (en) 2002-03-29 2006-05-23 Cps Color Equipment Spa Internal gear pump with recesses on the gear bearing surfaces
EP1659290A3 (fr) * 2002-03-29 2006-07-26 CPS Color Equipment S.p.A. con unico socio Pompe à engrenages internes avec rainures sur les surfaces du palier du pinion
US7241122B2 (en) 2002-03-29 2007-07-10 Cps Color Equipment S.P.A. Con Unica Socio Internal gear pump with recesses on the gear bearing surfaces
CN102135093A (zh) * 2011-04-13 2011-07-27 姜卫东 直线共轭内啮合齿轮泵
CN102135093B (zh) * 2011-04-13 2012-12-26 姜卫东 直线共轭内啮合齿轮泵

Also Published As

Publication number Publication date
ES2134379T3 (es) 1999-10-01
DE4425226A1 (de) 1996-01-18
EP0696679B1 (fr) 1999-06-16
DE59506206D1 (de) 1999-07-22

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