EP1561035A1 - Vorrichtung mit einem im gehäuse rotierenden bauteil - Google Patents
Vorrichtung mit einem im gehäuse rotierenden bauteilInfo
- Publication number
- EP1561035A1 EP1561035A1 EP03809695A EP03809695A EP1561035A1 EP 1561035 A1 EP1561035 A1 EP 1561035A1 EP 03809695 A EP03809695 A EP 03809695A EP 03809695 A EP03809695 A EP 03809695A EP 1561035 A1 EP1561035 A1 EP 1561035A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- coating
- component
- pump
- housing part
- 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
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
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
-
- 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
- F04C2230/90—Improving properties of machine parts
- F04C2230/91—Coating
-
- 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
- F04C2240/00—Components
- F04C2240/30—Casings or housings
-
- 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
- F05C2201/00—Metals
- F05C2201/02—Light metals
- F05C2201/021—Aluminium
Definitions
- the invention is based on a device with a housing and with at least one rotating component arranged in the housing according to the preamble of claim 1.
- Such a device is known from DE 196 25 564 AI.
- This device is a gear pump for a fuel injector of an internal combustion engine and has a housing in which a rotatingly driven pair of gears is arranged.
- the gears are mounted radially and axially in the housing.
- the housing is made of light metal such as aluminum.
- the housing has pins on which the gear wheels are mounted radially and walls that form axial bearings for the gear wheels. Due to the low hardness of the light metal of the housing, there is a lot of wear during operation of the gear pump, so that it only has a short service life.
- the device according to the invention with the features according to claim 1 has the advantage that the coating made of a nickel alloy reduces wear on the bearing of the at least one rotating one Component and thus a longer life of the device is reached.
- FIG. 1 shows an exploded view of a gear feed pump
- FIG. 2 shows the gear feed pump in a longitudinal section along line II-II in FIG. 3
- FIG. 3 shows the gear feed pump in a cross section along line III-III in FIG. 2.
- a device shown in FIGS. 1 to 3 in the form of a gear pump is arranged, for example, in a delivery line (not shown) from a storage tank to a high-pressure fuel pump or a fuel injection pump of a fuel injection device of an internal combustion engine, for example of a motor vehicle.
- the internal combustion engine is a self-igniting internal combustion engine and the fuel that is delivered by the gear pump is diesel fuel.
- the gear pump has a multi-part housing which has a housing part 10 and a cover part 12.
- a pump chamber 14 is formed between the housing part 10 and the cover part 12, in which a pair of gear wheels 16, 18 which mesh with one another on their outer circumference is arranged.
- the housing part 10 has two depressions 20, 22, one of the bases of which Bearing journal 24.26 protrudes.
- the bearing pins 24, 26 are formed in one piece with the housing part 10 and run at least approximately parallel to one another.
- the gear wheel 16 has a bore 17, via which it is rotatably mounted on the journal 24.
- the gear wheel 18 has a bore 19, via which it is rotatably mounted on the bearing journal 26.
- the bearing pins 24, 26 each determined an axis of rotation
- the pump chamber 14 is delimited in the direction of the axes of rotation 25, 27 of the gear wheels 16, 18 on the one hand by walls 21, 23 of the depressions 20, 22 of the housing part 10 and on the other hand by a wall 13 of the cover part 12.
- the cover part 12 is firmly connected to the housing part 10, for example by means of several screws.
- the housing part 10 and the cover part 12 consist of light metal, preferably aluminum or an aluminum alloy.
- the gears 16, 18 are preferably made of steel, for example of sintered steel.
- the gear pump has a drive shaft 30 which is rotatably mounted in the housing part 10.
- the drive shaft 30 is arranged at least approximately coaxially to the bearing journal 24, the housing part 10 having a bore which continues in the bearing journal 24 and through which the end of the drive shaft 30 passes.
- a shaft sealing ring is installed between the bore and the drive shaft 30 in order to seal the housing part 10.
- the drive shaft 30 is coupled to the gearwheel 16, for example via a coupling member 36 arranged between the front end of the bearing journal 24 and the cover part 12.
- the gearwheel 16 is driven in rotation during operation of the gear feed pump via the drive shaft 30 and transmits this rotary movement via a spur gear to the also provided with spur gear teeth, which mesh with the gear 16 on its outer circumference 18.
- the suction chamber 40 is connected to the pressure chamber 42 via a delivery channel 44 formed between the tooth grooves on the peripheral surfaces of the gear wheels 16, 18 and the upper and lower peripheral wall of the pump chamber 14.
- the suction chamber 40 and the pressure chamber 42 each have a connection opening in the wall of the housing part 10 or the cover part 12, through which the suction chamber 40 with a suction line (not shown) from the storage tank and the pressure chamber 42 via a likewise not shown delivery line with the suction chamber of the high-pressure fuel pump or the fuel injection pump is connected.
- the connection opening in the suction space 40 forms an inlet opening 46 and the connection opening in the pressure space 42 forms an outlet opening 48.
- the bearing journals 24, 26 of the housing part 10 form a radial bearing for the gears 16, 18 and are provided with a coating 50, which consists of a nickel alloy, to increase the wear resistance of the bearing of the gears 16, 18.
- the coating 50 consists in particular of a nickel-phosphorus alloy.
- the nickel-phosphorus alloy contains at least 94%, preferably about 95% nickel and at most 6%, preferably about 5% phosphorus.
- the walls 21, 23 of the housing part 10 and the wall 13 of the cover part 12 form axial bearing points for the gears 16, 18.
- the walls 21, 23 of the housing part 10 and the wall 13 of the cover part 12 are provided with the coating 50 in order to increase the wear resistance of the bearing.
- the coating 50 has an at least essentially flat microstructure on its surface. This also results in a particularly high wear resistance of the coating 50 Lubrication only by the required fuel and with mixed friction, that means achieved with sliding friction between the gear wheels 16, 18 and the coating 50.
- the surface of the coating 50 thus differs significantly from the surface of known coatings made of a nickel alloy, which has an uneven microstructure, a so-called coliflower structure, with bud-like, irregularly distributed and spherical elevations.
- the coating 50 has a uniform layer thickness distribution due to its flat microstructure and no or only a few imperfections on the surface. The reproducibility of a microhardness measurement of the coating 50 is thereby improved, since the microhardness measurement can be carried out at any point on the coating and delivers correct results.
- the coating 50 has a uniform glossy surface color without detectable addition of heavy metals. Due to the lack of heavy metal addition, the gear pump is recyclable according to existing legal regulations.
- the housing part 10 and the cover part 12 are pretreated in a special manner before the coating 50 is applied, and the coating 50 is applied to the regions of the housing part 10 and the cover part 12 specified above using a chemical coating method.
- the pretreatment and the application of the coating 50 are explained in more detail below.
- the housing part 10 and the cover part 12 are cleaned or pretreated, which takes place in an acid bath, for example a premal bath, at room temperature for a period of about 20 to 60 seconds for the activation of the surface.
- the parts 10, 12 are then rinsed with ultrapure water in one or more rinsing processes.
- the parts are then placed in a persulfate solution at room temperature for a period of about 45 to 90 seconds given in which the surface of the parts is at least partially oxidized, so that aluminum oxide forms. This is followed by at least one rinsing process with ultrapure water.
- the parts are then placed in a zincate solution at 20 ° to 28 ° C for a period of about 20 to 60 seconds. Zinc is present in the zincate solution in an ionic form, from which elemental zinc is deposited on the surface of the parts. This is followed by at least one rinsing process with ultrapure water.
- the parts are then again placed in a persulfate solution at room temperature for a period of about 45 to 90 seconds, as described above, in which the surface of the parts is at least partially oxidized. This is followed by at least one rinsing process with ultrapure water.
- the parts are then again placed in a zincate solution at 20 ° to 28 ° C. for a period of about 20 to 60 seconds, so that elemental zinc is deposited on the surface of the parts. This is followed by at least one rinse cycle with ultrapure water.
- the zinc deposited on the surface of the parts forms a connection layer for the subsequently applied nickel-phosphorus alloy.
- the parts are placed in a solution at 28 ° to 36 ° C for a period of about 3 to 10 minutes, which contains nickel in ionic form and orthophosphite, which forms the nickel-phosphorus alloy on the surface of the parts separates. This is followed by at least one rinsing process with ultrapure water.
- the parts are then placed in a solution in which nickel is present in ionic form and orthophosphite, from which the nickel-phosphorus alloy is deposited on the surface of the parts, at about 80 ° to 90 ° C. for a period until the required layer thickness is achieved. This is followed by at least one rinse cycle with ultrapure water.
- the parts are then dried in a first stage at a temperature of approximately 55 ° to 65 ° C.
- the parts are heated to a temperature of approximately 200 ° to 220 ° C. for a period of approximately 1 to 2 hours, which increases the hardness of the coating 50.
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 (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10250554A DE10250554A1 (de) | 2002-10-30 | 2002-10-30 | Vorrichtung mit einem Gehäuse und mit wenigstens einem im Gehäuse angeordneten rotierenden Bauteil |
DE10250554 | 2002-10-30 | ||
PCT/DE2003/002241 WO2004040139A1 (de) | 2002-10-30 | 2003-07-04 | Vorrichtung mit einem im gehäuse rotierenden bauteil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1561035A1 true EP1561035A1 (de) | 2005-08-10 |
EP1561035B1 EP1561035B1 (de) | 2016-11-02 |
Family
ID=32114963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03809695.4A Expired - Lifetime EP1561035B1 (de) | 2002-10-30 | 2003-07-04 | Vorrichtung mit einem im gehäuse rotierenden bauteil |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060165544A1 (de) |
EP (1) | EP1561035B1 (de) |
JP (1) | JP2006504892A (de) |
DE (1) | DE10250554A1 (de) |
WO (1) | WO2004040139A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006025182A1 (de) * | 2006-05-30 | 2007-12-06 | Trw Automotive Gmbh | Zahnradpumpe, insbesondere für eine Servolenkung |
DE102007044499A1 (de) * | 2007-09-18 | 2009-03-19 | Robert Bosch Gmbh | Kraftstoffpumpe, insbesondere für ein Kraftstoffsystem einer Kolben-Brennkraftmaschine |
DE102008042066A1 (de) | 2008-09-12 | 2010-03-18 | Robert Bosch Gmbh | Zahnradpumpe |
KR101205379B1 (ko) | 2010-04-28 | 2012-11-28 | 삼성중공업 주식회사 | 정량 펌프 |
CN102808765B (zh) * | 2011-06-01 | 2017-04-05 | 德昌电机(深圳)有限公司 | 流体泵送装置 |
DE102017125096B4 (de) | 2017-10-26 | 2022-05-19 | Hanon Systems | Verfahren zum Herstellen eines Scrollverdichters und mit dem Verfahren hergestellter Scrollverdichter |
US20200025195A1 (en) * | 2018-07-17 | 2020-01-23 | Hamilton Sundstrand Corporation | Cavitation resistant gear driven fuel pump |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH350877A (fr) * | 1957-09-11 | 1960-12-15 | Turolla Marco | Pompe à deux pignons |
US3077840A (en) * | 1960-08-02 | 1963-02-19 | Plessey Co Ltd | Rotary displacement pumps |
GB1236935A (en) * | 1967-09-02 | 1971-06-23 | Plessey Co Ltd | Improvements in or relating to gear pumps more particularly for use with hot hydrocarbon liquid fuels |
DE1810314A1 (de) * | 1968-11-22 | 1970-06-11 | Bosch Gmbh Robert | Zahnradpumpe oder -motor |
US4266915A (en) * | 1978-07-10 | 1981-05-12 | Tyrone Hydraulics Inc. | Gear pumps and motors |
JPS62199982A (ja) * | 1986-02-27 | 1987-09-03 | Matsushita Refrig Co | スクロ−ル型圧縮機 |
JP2697768B2 (ja) * | 1987-07-27 | 1998-01-14 | 株式会社ゼクセル | ベーン型圧縮機 |
DE8811252U1 (de) | 1988-09-06 | 1988-10-27 | Kracht Pumpen- Und Motorenfabrik Gmbh & Co Kg, 5980 Werdohl | Außenzahnradpumpe |
US5024591A (en) * | 1989-06-21 | 1991-06-18 | Diesel Kiki Co., Ltd. | Vane compressor having reduced weight as well as excellent anti-seizure and wear resistance |
JPH0392590A (ja) * | 1989-09-05 | 1991-04-17 | Toyota Autom Loom Works Ltd | スクロール型圧縮機 |
JP3254457B2 (ja) * | 1992-09-18 | 2002-02-04 | 株式会社日立製作所 | 無給油式スクリュー圧縮機のロータ形成方法およびそのロータを用いた無給油式スクリュー圧縮機 |
JP2682784B2 (ja) * | 1993-02-23 | 1997-11-26 | 大同メタル工業株式会社 | スクロール型圧縮機のオルダムリング |
JP3561929B2 (ja) * | 1993-08-23 | 2004-09-08 | 株式会社豊田自動織機 | スクロール型圧縮機 |
DE19625564C2 (de) | 1996-06-26 | 2000-06-08 | Bosch Gmbh Robert | Kraftstoff-Förderpumpe für eine Kraftstoff-Einspritzpumpe für Brennkraftmaschinen |
US5993183A (en) * | 1997-09-11 | 1999-11-30 | Hale Fire Pump Co. | Gear coatings for rotary gear pumps |
-
2002
- 2002-10-30 DE DE10250554A patent/DE10250554A1/de not_active Withdrawn
-
2003
- 2003-07-04 JP JP2004547373A patent/JP2006504892A/ja active Pending
- 2003-07-04 US US10/531,267 patent/US20060165544A1/en not_active Abandoned
- 2003-07-04 EP EP03809695.4A patent/EP1561035B1/de not_active Expired - Lifetime
- 2003-07-04 WO PCT/DE2003/002241 patent/WO2004040139A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2004040139A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1561035B1 (de) | 2016-11-02 |
US20060165544A1 (en) | 2006-07-27 |
WO2004040139A1 (de) | 2004-05-13 |
JP2006504892A (ja) | 2006-02-09 |
DE10250554A1 (de) | 2004-05-19 |
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