EP2872778A1 - Hochdruckpumpe - Google Patents
HochdruckpumpeInfo
- Publication number
- EP2872778A1 EP2872778A1 EP13736844.5A EP13736844A EP2872778A1 EP 2872778 A1 EP2872778 A1 EP 2872778A1 EP 13736844 A EP13736844 A EP 13736844A EP 2872778 A1 EP2872778 A1 EP 2872778A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive shaft
- recess
- pump
- drive
- housing
- 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
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 239000000314 lubricant Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 241001494479 Pecora Species 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
- F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0413—Cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0448—Sealing means, e.g. for shafts or housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/006—Crankshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
Definitions
- the invention relates to a high-pressure pump.
- such a high-pressure pump is used as a pump for delivering fluid for a storage injection system for internal combustion engines of motor vehicles.
- Storage injection systems for internal combustion engines of motor vehicles should be able to provide the necessary volume flow and the required fluid pressure.
- the high-pressure pump is subject to strong loads in memory injection systems for motor vehicles, in particular mechanical stresses. In particular, large forces must be able to be absorbed by such high-pressure pumps. This places high demands on the material as well as on the construction of the high pressure pump.
- the object of the invention is to sheep ⁇ fen a high-pressure pump, which allows reliable and precise operation even under heavy mechanical stresses. At the same time, the high-pressure pump should be inexpensive to produce.
- the object is solved by the features of the independent claim.
- Advantageous embodiments of the invention are characterized in the subclaims.
- the invention is characterized by a high-pressure pump for delivering a fluid, with a pump housing, extending in the direction of a longitudinal axis axle member which is mounted in a housing recess of the pump housing, a rotatably mounted on the axle drive shaft, and a fixedly coupled to the drive shaft Drive element, which is designed to drive the drive shaft.
- the high-pressure ⁇ pump has a bearing element which is fixedly coupled to the pump housing or formed integrally with the pump housing, and having a recess in which the axle is mounted.
- the recess of the bearing element is arranged relative to the housing recess such that the drive element axially between the recess of the bearing element and the
- Housing recess is arranged.
- the drive element extends substantially in a plane perpendicular to the longitudinal axis.
- a sliding bearing is arranged in the plane in which the forces of the drive element act. This can be avoided that edges of components of the high-pressure pump act on the sliding bearing.
- the plain bearing allow low friction between the axle and the drive shaft, too when the forces exerted by the drive element on the drive shaft and the axle element are large.
- the high-pressure pump has at least one pump unit which can be driven by the drive shaft and which extends essentially in a further plane perpendicular to the longitudinal axis.
- the further plane is arranged axially between the recess of the bearing element and the housing recess.
- a further advantageous embodiment is arranged in the further plane radially between the axle and the drive shaft ⁇ at least one further sliding bearing.
- This has the advantage that the further sliding bearing lies in the plane in which the forces of the pump unit also act.
- the sliding bearing allow a low friction between the axle and the drive shaft, even if the forces between the drive shaft and the axle are large.
- Figure 1 is a partially sectioned, partially perspective
- Figure 2 is a detail view of the high pressure pump.
- FIG. 1 shows a high pressure pump 10 with a pump housing 12.
- the pump housing 12 is preferably formed wholly or partly of a metal.
- the pump housing 12 is in the illustrated embodiment in two parts from a first part 12 a and a second part 12 b executed.
- the first part 12 a is in particular pot-shaped.
- the second part 12 b is formed in particular as a flange.
- the pump housing 12 may also be made in one piece or have more than two parts.
- the high-pressure pump 10 has a pump unit 14. In other embodiments, however, the high-pressure pump 10 may also have two or more pump units.
- the high-pressure pump 10 has centrally an axle 15.
- the shaft element 15 has a longitudinal axis Z.
- the pump housing 12 has a housing recess 13.
- the axle element 15 is mounted in the housing recess 13.
- the second part 12b of the pump housing 12 designed as a flange is firmly connected to the first part 12a of the pump housing 12. pelt.
- the axle 15 is in operative connection with a drive shaft 16 designed as a camshaft.
- a drive shaft 16 designed as a camshaft instead of the drive shaft 16 designed as a camshaft, an eccentric shaft can also be used.
- the pump unit 14 essentially consists of a cylinder housing 17 coupled to the pump housing 12, a cylinder chamber 18 arranged in the cylinder housing 17, a spring 20 and a high-pressure piston 21.
- the cylinder housing 17, the cylinder chamber 18, the high-pressure piston 21 and the spring 20 are mutually aligned arranged coaxially.
- the high-pressure piston 21 is mounted axially movable in the cylinder chamber 18 of the cylinder housing 17.
- the high-pressure piston 21 is held in constant operative connection with the drive shaft 16 by means of the spring 20, which is preferably supported on the cylinder housing 17 and cooperates with the high-pressure piston 21.
- the cylinder housing 17 has a supply line 22, in which preferably an inlet valve 24 is arranged.
- the inlet valve 24 facilitates the filling of the cylinder chamber 18 and prevents the backflow of the fluid from the feed line 22 during the compression phase.
- the cylinder housing 17 further has a drain line 26 and an outlet valve 28 arranged therein. Via the drain line 26 and the outlet valve 28, the fluid can be ejected from the cylinder chamber 18.
- the pump unit 14 has a roller tappet 32 coupled to the high pressure piston 21.
- the roller tappet 32 is operatively connected to the drive shaft 16 via a cylindrical roller 30.
- the pump unit 14 may also be used be formed with an eccentric ring and coupled to the high pressure piston shoe.
- a sliding bearing 36 and a further sliding bearing 38 are arranged.
- more than two plain bearings between the axle 15 and the drive shaft 16 can be angeord ⁇ net.
- the sliding bearings 36, 38 allow that only a slight friction between the shaft member 15 and the drive shaft 16 occurs, even if the forces occurring between the axle 15 and the drive shaft 16 are large.
- the high-pressure pump 10 further has a drive element 40.
- the drive element 40 is fixedly coupled to the drive shaft 16.
- the drive element 40 is preferably designed as a belt pulley or as a sprocket.
- a nut 42 is arranged with a thread 44.
- the high-pressure pump 10 also has a bearing element 46.
- the bearing element 46 is fixedly coupled to the pump housing 12.
- the bearing element 46 may also be formed integrally with the pump housing.
- the bearing element 46 has a recess 48.
- the bearing element 46 is formed as a bracket.
- the trained as a bracket bearing element 46 has a first bracket portion 50.
- the first bracket portion 50 is fixedly coupled to the pump housing 12.
- the bearing element 46 embodied as a bracket has a second bracket that is distal with respect to the first bracket section 50. section 52.
- the bearing element 46 further has a septab ⁇ section 54, which connects the first bracket portion 50 with the second bracket portion 52.
- the bearing member 46 of the first bracket portion 50, the second bracket portion 52 and the intermediate portion 54 is integrally formed.
- the axle element 15 is mounted in the recess 48 of the bearing element 46.
- the drive element 40 is arranged axially between the recess 48 and the housing recess 13. This has the advantage that a very precise alignment of the shaft member 15 can be achieved. Become particular of the
- Drive element 40 large forces transmitted via the drive shaft 16 to the axle 15, so secure storage of the shaft member 15 in the pump housing 12 and in the bearing element 46 can be achieved. Thus, a slight wear on the axle 15 and on the drive shaft 16 can be achieved. This can also be achieved that required for overcoming the frictional forces drive power for
- High pressure pump 10 can be small.
- the drive member 40 extends substantially in a plane El, which is perpendicular to the longitudinal axis z.
- a stable mounting of the shaft member 15 and the drive shaft 16 can be achieved even with large acting in the direction of the plane El forces of the drive member 40.
- the sliding bearing 36 can be further achieved that a low friction between the shaft member 15 and the drive shaft 16 occurs, even if the outgoing of the drive member 40 forces on the drive shaft 16 and the shaft member 15 are large.
- the pump unit 14 extends substantially in a further plane E2 perpendicular to the longitudinal axis Z.
- the other sliding bearing 38 is radially between the shaft member 15 and the Drive shaft 16 arranged in the further plane E2.
- the other sliding bearing 38 is thus in the further plane E2, in which the forces of the pump unit 14, in particular of the high-pressure piston ⁇ 21 act. It is thus possible to achieve that the further sliding bearing 38 only leads to a low friction between the axle element 15 and the drive shaft 16. This is true even if the forces between the drive shaft 16 and the shaft member 15 are large.
- a lubricant supply passage 56 is formed, by means of which it is possible, in particular a space between the shaft member 15 and the drive shaft 16, in which the sliding bearings 36, 38 are arranged to rinse with a lubricant.
- the lubricant can be at ⁇ closing discharged from the space between the axle 15 and the drive shaft 16 preferably via the drive shaft 16 and the pump housing 12 via a lubricant return passage 58 from the high pressure pump 10 degrees.
- FIG. 2 shows a detailed view of parts of the high-pressure pump 10.
- the drive element 40 embodied as a belt pulley or as a sprocket is shown, which is coupled to a transmission element 60.
- Transmission element 60 a driving force, for example, from the internal combustion engine to the drive member 40 are transmitted.
- the transmission element 60 is preferably entspre ⁇ accordingly designed as a belt or a chain forming the drive element 40th
- Figure 2 shows the trained as a bracket bearing element 46, in which the axle 15 is mounted.
- the bearing element 46 is fastened by means of fastening elements 62 ⁇ to a motor housing, not shown.
- the function of the high pressure pump 10 will be described with reference to Figures 1 and 2:
- Inlet valve 24 is conveyed into the cylinder chamber 18, wherein the exhaust valve 28 is closed.
- a pumping stroke is then performed, that is, a movement of the high pressure piston 21 from the longitudinal axis Z of the shaft member 15 away.
- the fluid in the cylinder chamber 18 is compressed or discharged via the outlet valve 28 under high pressure, the inlet valve 24 being closed.
- the high-pressure pump 10 is a high-pressure fuel pump, for example
- Housing recess 13 can be achieved, that the transverse force FQ is in particular also absorbed by the bearing element 46, and so a precise storage of the shaft member 15 and the
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210211976 DE102012211976B3 (de) | 2012-07-10 | 2012-07-10 | Hochdruckpumpe |
PCT/EP2013/064061 WO2014009224A1 (de) | 2012-07-10 | 2013-07-03 | Hochdruckpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2872778A1 true EP2872778A1 (de) | 2015-05-20 |
EP2872778B1 EP2872778B1 (de) | 2016-09-14 |
Family
ID=48790399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13736844.5A Active EP2872778B1 (de) | 2012-07-10 | 2013-07-03 | Hochdruckpumpe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2872778B1 (de) |
DE (1) | DE102012211976B3 (de) |
WO (1) | WO2014009224A1 (de) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2263837A1 (de) * | 1972-12-28 | 1974-07-04 | Teves Gmbh Alfred | Radialkolbenpumpe |
DE4332324A1 (de) * | 1993-09-23 | 1994-10-20 | Bosch Gmbh Robert | Radialkolbenmaschine |
DE19605781B4 (de) * | 1996-02-16 | 2005-04-28 | Zahnradfabrik Friedrichshafen | Radialkolbenpumpe |
DE19920168A1 (de) * | 1998-05-16 | 1999-11-18 | Luk Automobiltech Gmbh & Co Kg | Radialkolbenpumpe |
DE102006006555B4 (de) * | 2006-02-13 | 2008-03-06 | Siemens Ag | Hochdruckpumpe |
DE102006027773A1 (de) * | 2006-06-16 | 2007-12-20 | Robert Bosch Gmbh | Fahrzeugbremsanlagen-Kolbenpumpe |
DE102010001882A1 (de) * | 2010-02-12 | 2011-08-18 | Robert Bosch GmbH, 70469 | Kraftstoffhochdruckpumpe |
-
2012
- 2012-07-10 DE DE201210211976 patent/DE102012211976B3/de not_active Expired - Fee Related
-
2013
- 2013-07-03 EP EP13736844.5A patent/EP2872778B1/de active Active
- 2013-07-03 WO PCT/EP2013/064061 patent/WO2014009224A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2014009224A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2014009224A1 (de) | 2014-01-16 |
DE102012211976B3 (de) | 2013-11-07 |
EP2872778B1 (de) | 2016-09-14 |
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