EP0696679B1 - Zahnradpumpe zur Lackförderung - Google Patents
Zahnradpumpe zur Lackförderung Download PDFInfo
- Publication number
- EP0696679B1 EP0696679B1 EP95110689A EP95110689A EP0696679B1 EP 0696679 B1 EP0696679 B1 EP 0696679B1 EP 95110689 A EP95110689 A EP 95110689A EP 95110689 A EP95110689 A EP 95110689A EP 0696679 B1 EP0696679 B1 EP 0696679B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bore
- gear
- gears
- shaft
- recesses
- 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
Links
- 239000004922 lacquer Substances 0.000 title 1
- 239000003973 paint Substances 0.000 claims description 10
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 15
- 238000004140 cleaning Methods 0.000 description 8
- 239000003086 colorant Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
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 colors for the coating of objects, in particular vehicle bodies and -Share, with a housing in which at least two gears are arranged and which consists of a housing body and two on its flat sides front and is formed on the back, which cover plates have recesses have, which serve as a guide for shafts for the gears, which shafts each with a central bore and radial bores connected to it are provided, and have further recesses, which for connection serve the interior of the housing with the exterior.
- Gear pumps for the conveyance of liquids are known.
- gears mesh with each other with little play, with the meshing of the gears the liquid is pressed into the pressure chamber from the suction chamber.
- the respective Flow rate per time depends on the speed and the tooth width of the gears.
- EP-A-0 061 630 is a flushable gear pump of the type mentioned become known, which is provided with a lockable flow system to to carry out the necessary cleaning when changing colors.
- the gear pump according to the invention limit the housing and the arranged therein Gears with their teeth a work space, the annular gap with the axial recesses arranged therein and the one provided in each shaft at least one radial bore and the associated at least one axial bore form a washroom and the workspace and the washroom by at least a radial bore provided in each gear are connected to each other.
- the at least one axial bore in each Shaft provided as a central hole. This creates influences due to centrifugal forces of the rotating shaft on the flow path of the cleaning fluid flowing through the axial bore avoided.
- This through opening can have a cross section according to the axial bore, but it can also adapted to the shaft cross section of the assigned shaft be.
- each cover plate is expediently provided with at least one Provide through hole for the associated shaft, wherein advantageously the through opening in each case with the central bore is aligned in the assigned shaft.
- the shaft end that has the axial bore can in each case the assigned shaft in the provided with through opening Recess in the cover plate, which in turn with a flushing device arranged outside the housing can be connected.
- a flushing device arranged outside the housing.
- the axial recesses provided in the annular gaps it may be advantageous to insert this into the central hole of the molded gear. According to another embodiment it may prove advantageous if the axial Recesses in the annular gap in the associated guide shaft are molded.
- a Combination may be appropriate, in which both the shaft and also the central bore of the gear, each with molded therein axial recesses are provided.
- the housing body 14 which has a cuboid shape, are two gears 20, 22 arranged side by side in a recess 24.
- the recess 24, the cross section of which can be seen in FIG. 3 is followed by the peripheral contour of the gears 20, 22 and accordingly an approximately oval cross-section, both sides the plane of engagement of the two gear wheels 20, 22 work spaces 26, 28 are formed.
- the workrooms 26, 28 are not closer to shown by one of the cover plates 16, 18 in a known manner Way fluid channels connected to the outside, through which is the supply and discharge of the paint application fluid. This Fluid channels each open into one of the working spaces 26, 28. In this case, the fluid is rotating gears 20, 22 from the one work space 26 promoted in the work room 28.
- gears 20, 22 are each guided by means of shafts 30, 32, each shaft into an upper cover plate shown here 16 arranged recess 34, 36 engages.
- Each of the shafts 30, 32 has an axial bore 38, 40 as well provided with a radial bore 39, 41, which the axial bore 38, 40 connects to the shaft surface.
- the axial bores 38, 40 which are designed as central bores are, and the radial bores 39, 41 serve as flow channels for cleaning fluid, which is, for example, the one with the exterior related axial bore 38 in the first Shaft 30 from a flushing device, not shown here is fed.
- This via the axial bore 38 and the radial bore 39 inflowing cleaning fluid first gets into one between the first shaft 30 and the associated gear 20 formed annular gap 42, and from here by an associated Gear 20 provided radial bore 44.
- a similar Radial bore 46 is provided in the adjacent second gear 22.
- the second gear 22, which has a key-and-groove connection 45 is connected in a rotationally fixed manner to the assigned second shaft 32, which serves as the drive shaft and for this purpose with one here Drive motor, not shown, is connected also when performing a color change, first with cleaning fluid rinsed.
- the supplied cleaning fluid arrives via the axial bore arranged in the second shaft 32 40 and radial bore 41 in the between the assigned second Gear 22 and the second shaft 32 formed annular gap and this finally in via the radial bore 46 in the gear 22 one of the work rooms 26, 28 and from here via the ones not shown Fluid channels back into the outside space.
- To the flow resistance for the cleaning fluid to reduce is the annular gap between the respective shaft 30, 32 and the associated one Gear wheel 20, 22 by means of axial axially formed on the circumference Recesses 48 enlarged.
- the front view of the gear 20 shows, the axial recesses 48 are more uniform Arrangement formed in the central bore 21.
- the second gear 22 is formed, here additionally the axial groove for the key 45 is provided.
- the axial recesses 48 can also on the central bore 21 penetrating shaft 30 may be formed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
- Fig. 1
- einen Längsschnitt durch eine erfindungsgemäße Zahnradpumpe
- Fig. 2
- einen Querschnitt durch ein Zahnrad der erfindungsgemäßen Zahnradpumpe
Claims (3)
- Zahnradpumpe (10) zur Förderung von Lackfarben für die Beschichtung von Gegenständen, insbesondere von Fahrzeugkarosserien und -teilen, mit einem Gehäuse (12), in welchem wenigstens zwei Zahnräder (20, 22) angeordnet sind und welches aus einem Gehäusekörper (14) und zwei auf dessen Flachseiten front- und rückseitig anliegenden Abdeckplatten (16, 18) gebildet ist, welche Abdeckplatten (16, 18) Ausnehmungen (34, 36, 37) aufweisen, die als Führung für Wellen (30, 32) für die Zahnräder (20, 22) dienen, welche Wellen (30, 32) jeweils mit einer Zentralbohrung (38, 40) sowie hiermit in Verbindung stehenden radialen Bohrungen (39, 41) versehen sind, sowie weitere Ausnehmungen aufweisen, welche zur Verbindung des Innenraums des Gehäuses (12) mit dem Außenraum dienen, dadurch gekennzeichnet,
daß in dem zwischen den Zentralbohrungen (21, 23) der Zahnräder (20, 22) einerseits und den diese durchgreifenden Wellen (30, 32) andererseits gebildeten Ringspalt axial durchlaufende Ausnehmungen (48) gleichmäßig über den Umfang verteilt angeordnet sind, die in die Zentralbohrung (21, 23) des betreffenden Zahnrades (20, 22) eingeformt sind. - Zahnradpumpe nach Anspruch 1, dadurch gekennzeichnet, daß das Gehäuse (12) und die darin angeordneten Zahnräder (20, 22) mit ihren Zähnen einen Arbeitsraum (26, 28) begrenzen, daß der Ringspalt mit den darin angeordneten axialen Ausnehmungen (48) und die in jeder Welle (30, 32) vorgesehene wenigstens eine Radialbohrung (39, 41) sowie die hiermit verbundene wenigstens eine Axialbohrung (38, 40) einen Spülraum bilden und daß der Arbeitsraum und der Spülraum durch wenigstens eine in jedem Zahnrad (20, 22) vorgesehene Radialbohrung (44, 46) miteinander verbunden sind.
- Zahnradpumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß wenigstens eine Ausnehmung (37) zur Führung einer Welle (32) in der Abdeckplatte (18) eine Durchgangsöffnung, vorzugsweise eine Bohrung, aufweist.
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 EP0696679A1 (de) | 1996-02-14 |
EP0696679B1 true EP0696679B1 (de) | 1999-06-16 |
Family
ID=6523384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95110689A Expired - Lifetime EP0696679B1 (de) | 1994-07-16 | 1995-07-08 | Zahnradpumpe zur Lackförderung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0696679B1 (de) |
DE (2) | DE4425226A1 (de) |
ES (1) | ES2134379T3 (de) |
Families Citing this family (4)
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 |
ITBO20020167A1 (it) * | 2002-03-29 | 2003-09-29 | Corob Spa | Perfezionamenti in una pompa volumetrica rotativa per prodotti fluidi |
CN102135093B (zh) * | 2011-04-13 | 2012-12-26 | 姜卫东 | 直线共轭内啮合齿轮泵 |
DK4202181T3 (da) * | 2021-12-21 | 2024-06-10 | Mueller A & K Gmbh Co Kg | Tandhjulspumpe |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR931391A (fr) * | 1946-07-03 | 1948-02-20 | Pompes et moteurs à engrenages à pressions équilibrées | |
DE1802561A1 (de) * | 1968-10-11 | 1970-05-27 | Licentia Gmbh | Heisswasser-Umwaelzpumpe |
US4400147A (en) * | 1981-03-25 | 1983-08-23 | Binks Manufacturing Company | Flushable rotary gear pump |
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. |
-
1994
- 1994-07-16 DE DE4425226A patent/DE4425226A1/de not_active Withdrawn
-
1995
- 1995-07-08 DE DE59506206T patent/DE59506206D1/de not_active Expired - Lifetime
- 1995-07-08 ES ES95110689T patent/ES2134379T3/es not_active Expired - Lifetime
- 1995-07-08 EP EP95110689A patent/EP0696679B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59506206D1 (de) | 1999-07-22 |
ES2134379T3 (es) | 1999-10-01 |
DE4425226A1 (de) | 1996-01-18 |
EP0696679A1 (de) | 1996-02-14 |
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