EP1629203A1 - Zahnradpumpe - Google Patents
ZahnradpumpeInfo
- Publication number
- EP1629203A1 EP1629203A1 EP04732274A EP04732274A EP1629203A1 EP 1629203 A1 EP1629203 A1 EP 1629203A1 EP 04732274 A EP04732274 A EP 04732274A EP 04732274 A EP04732274 A EP 04732274A EP 1629203 A1 EP1629203 A1 EP 1629203A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gear
- pinion
- pump
- gear pump
- tooth
- 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.)
- Withdrawn
Links
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
- 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
-
- 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
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
-
- 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
- F04C2230/00—Manufacture
- F04C2230/20—Manufacture essentially without removing material
- F04C2230/22—Manufacture essentially without removing material by sintering
-
- 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
- F04C2230/00—Manufacture
- F04C2230/60—Assembly methods
- F04C2230/602—Gap; Clearance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/12—Polyetheretherketones, e.g. PEEK
Definitions
- the invention relates to a gear pump, for example for oil or fuel, in particular a diesel prefeed pump, with a first and a second gear, wherein the first gear can be designed as a pinion and the second gear as a ring gear and the pinion is mounted eccentrically to the ring gear ,
- Gear pumps of this type are known.
- the special gears used there are gears that are very sensitive to axis misalignment. If the eccentric distance between the axes of the ring gear and pinion deviates slightly from its target value (production-related tolerances), the sealing of the tooth flanks during displacement is no longer guaranteed. Leakage occurs and pressure and delivery volume fall below the required values.
- a gear pump for example for oil or fuel, in particular a diesel feed pump, with a first and a second gear, the first gear being designed as a pinion and the second gear as a ring gear and the pinion being eccentrically mounted to the ring gear is, wherein the teeth of the first gear or the second gear are formed with a groove in the center of the tooth, starting from the tip diameter. This groove enables the gear wheel to be deformed in such a way that the flanks of a tooth can be compressed with respect to one another.
- a gear pump is preferred in which the first gear or the second gear with the teeth with a groove in the center of the tooth is made of an elastic plastic, preferably a slip-modified PEEK. This has the advantage that the first gear turns out to be small and light.
- the shape of the first gearwheel with the teeth with the groove in the center of the tooth also represents a construction that is particularly suitable for plastics.
- a gear pump according to the invention is characterized in that the first gear or the second gear is made with oversize. This has the advantage that the gear has a tight fit compared to the ring gear or pinion during installation.
- a gear pump is also preferred, in which the second gear or the first gear, that is to say the counter gear to the plastic gear, is preferably made of sintered steel. That has z.
- the ring gear has the advantage that both the inner and the outer shape of the ring gear can be designed very freely.
- a gear pump according to the invention is characterized in that the plastic pinion on the eccentric directly, i.e. is stored without using a sliding bush.
- the elastic high-temperature plastic PEEK has such good tribological properties that the use of a sliding bush is not necessary.
- a gear pump is preferred in which the toothing represents a cycloid toothing.
- a gear pump is also preferred, in which the first and the second gear are designed as the gears of an external gear pump.
- the figure shows a top view of a pinion 1, which is mounted eccentrically within a ring gear 3.
- the pinion 1 is arranged on an eccentric shaft 5, which is offset by the eccentricity 7 relative to the center of the ring gear 3.
- the ring gear 3 can be made of sintered steel and thus assume any outer contour 9, which, for. B. can correspond to the outer contour of the gear pump housing. Openings 11 within the ring gear component 3 are used to carry out fasteners such. B. screws with which a front and rear cover of the pump chamber can be mounted, and for carrying out fluid lines.
- the pinion 1 has a plurality of teeth 13 which are formed with a groove 15 in the center of the tooth, the groove base 17 starting approximately from the tip circle diameter.
- a pinion tooth 13 If a pinion tooth 13 is immersed, for example, in a ring gear tooth space 19, its flanks 21 can be compressed in the hundredths of a millimeter range. The actual compression depends on the axis offset. The possibility of the pinion tooth 13 to be able to adjust to the axis offset by this compression allows minimal sealing gaps between the tooth flanks even with extreme axis offset, such as, for. B. at +/- 0.1 mm.
- the design of the pinion 1 not only solves the task, but also represents a plastic-compatible construction with its roundings. The pinion 1 is small and light and can therefore also be produced economically using the relatively expensive material PEEK. The good tribological properties of the slip-modified PEEK also allow the pinion 1 to be supported on the eccentric 5 without the use of a sliding bush.
- the invention leads to a toothing that is insensitive to axial misalignment, for example for a diesel pre-feed pump, which consists of a few individual parts and ensures good volumetric efficiency even at high temperatures and low speeds.
- the invention is not limited to internal gear pumps. It is also conceivable that the first and second gear belong to an external gear pump.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10323311 | 2003-05-23 | ||
PCT/DE2004/000986 WO2004109110A1 (de) | 2003-05-23 | 2004-05-12 | Zahnradpumpe |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1629203A1 true EP1629203A1 (de) | 2006-03-01 |
Family
ID=33494746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04732274A Withdrawn EP1629203A1 (de) | 2003-05-23 | 2004-05-12 | Zahnradpumpe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1629203A1 (de) |
DE (1) | DE112004000064D2 (de) |
WO (1) | WO2004109110A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9429149B2 (en) * | 2012-05-15 | 2016-08-30 | Sabic Global Technologies B.V. | Polyetherimide pump |
DE102014102643A1 (de) | 2014-02-27 | 2015-08-27 | Schwäbische Hüttenwerke Automotive GmbH | Rotationspumpe mit Kunststoffverbundstruktur |
IT202000018235A1 (it) | 2020-07-28 | 2022-01-28 | Casappa Spa | Macchina volumetrica ad ingranaggi |
DE102022200830A1 (de) | 2022-01-26 | 2023-07-27 | Zf Friedrichshafen Ag | Zahnradpumpe mit Geräuschoptimierung |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62111181A (ja) * | 1985-11-06 | 1987-05-22 | Inoue Japax Res Inc | 回転ポンプ |
DE3737961A1 (de) * | 1987-11-07 | 1989-05-18 | Barmag Barmer Maschf | Innenzahnradpumpe |
JPH02304243A (ja) * | 1989-05-19 | 1990-12-18 | Toshiba Corp | 歯車 |
JPH0544651A (ja) * | 1991-08-12 | 1993-02-23 | Toyooki Kogyo Co Ltd | 内接歯車ポンプ |
IT1271052B (it) * | 1993-11-18 | 1997-05-26 | Pompa ad ingranaggi interni con sporgenze volumetriche | |
US6264449B1 (en) * | 2000-02-16 | 2001-07-24 | Alexander Maute | Plastic toothed wheel for a toothed wheel pump |
-
2004
- 2004-05-12 EP EP04732274A patent/EP1629203A1/de not_active Withdrawn
- 2004-05-12 DE DE112004000064T patent/DE112004000064D2/de not_active Ceased
- 2004-05-12 WO PCT/DE2004/000986 patent/WO2004109110A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2004109110A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2004109110A1 (de) | 2004-12-16 |
DE112004000064D2 (de) | 2005-07-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20051223 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR |
|
DAX | Request for extension of the european patent (deleted) | ||
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: RIBARIC, DAVID |
|
17Q | First examination report despatched |
Effective date: 20070216 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: IXETIC HUECKESWAGEN GMBH |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20080918 |