EP1987249A1 - Pompe à haute pression - Google Patents

Pompe à haute pression

Info

Publication number
EP1987249A1
EP1987249A1 EP06841427A EP06841427A EP1987249A1 EP 1987249 A1 EP1987249 A1 EP 1987249A1 EP 06841427 A EP06841427 A EP 06841427A EP 06841427 A EP06841427 A EP 06841427A EP 1987249 A1 EP1987249 A1 EP 1987249A1
Authority
EP
European Patent Office
Prior art keywords
pressure pump
pump
carrier element
plastic
pressure
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
EP06841427A
Other languages
German (de)
English (en)
Other versions
EP1987249B1 (fr
Inventor
Günter LEWENTZ
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.)
Aumovio Germany GmbH
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1987249A1 publication Critical patent/EP1987249A1/fr
Application granted granted Critical
Publication of EP1987249B1 publication Critical patent/EP1987249B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • 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
    • 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
    • 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
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/04—Composite, e.g. fibre-reinforced
    • 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
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/22—Reinforcements

Definitions

  • the invention relates to a high-pressure pump.
  • such a high-pressure pump as a conveyor ⁇ is a pump for delivering fluid for an accumulator injection system for internal combustion engines used in motor vehicles.
  • the object of the invention is to provide a high-pressure pump, which allows reliable and precise operation even at high pump pressures thereby subject to the least possible wear. At the same time, the high-pressure pump should be inexpensive to produce.
  • the object is solved by the features of the independent claims. Advantageous embodiments of the invention are characterized in the subclaims.
  • the invention is characterized by a high-pressure pump having a carrier element, a drive shaft rotatably gela ⁇ siege drive shaft, with at least one of the drive shaft ⁇ driven pump unit having a cylinder housing with a high pressure in the intended use cylinder chamber in which an axially movable High pressure piston is arranged, which is in Wirkver ⁇ bond with the drive shaft.
  • the cylinder housing is coupled to the carrier element and the carrier element is made of a plastic ge ⁇ forms.
  • the support element In the pump unit drivable by the drive shaft, a very high pressure is generated by means of the high pressure piston during normal use of the high ⁇ pressure pump in the cylinder chamber. This pressure has the effect that very strong forces between the high-pressure piston and the standing in operative connection with this drive shaft can occur.
  • the support element In order to absorb these forces, the support element usually consists of a metal.
  • the invention encompasses the recognition that plastics can also be used as material for the carrier element, preferably if they have a high tensile and compressive strength.
  • the carrier element is designed as a plastic injection-molded part. Since ⁇ it is possible to produce even complicated geometries of the support element. In particular, these complicated geometries may be due to recesses of the attachments. Next, a high image fidelity is possible in injection molding, so that even small tolerances can be displayed. In addition, inexpensive embodiments of the carrier element are possible by the design of the carrier element as a plastic Sp ⁇ tzgussteil.
  • the plastic is selected from the group of thermosets. With such a high mechanical plastics ⁇ African load, in particular a good tensile and compressive strength ⁇ is achievable.
  • the plastic from the group of molding compositions is selected from phenolic compounds.
  • the plastic is particularly preferably selected from the group of Vyncolites. Vyncolites have the advantage that they can have high tensile and compressive strength and high dimensional stability under temperature changes. In addition, Vyncolite achieves high resistance to fuels.
  • the plastic is reinforced with fibers from the group of glass fibers and carbon fibers.
  • the fibers in the plastic at least section-wise from ⁇ are aligned in one direction. This is a very high compressive strength and thus a very good mechanical ⁇ cal stability of the support element possible.
  • the carrier element contains graphite. This has the advantage that particularly good sliding properties of the Trä ⁇ gerelements are possible. In particular, a rei ⁇ low-energy storage of the drive shaft in the support member he ⁇ can be enough.
  • the carrier element has a carrier element recess and at least one of the pump units is coupled to the carrier element by means of a screw introduced into the carrier element recess.
  • the screw is self-tapping. This can be achieved without forming a thread in the Suspasmodisedung a secure coupling between the pump unit and the support element.
  • a threaded insert is arranged in the Stromelementaus brieflyung and at least one of the pump units is coupled by means of an introduced into the threaded insert screw with the carrier element.
  • the high-pressure pump is a radial piston pump with an even number of two coaxially arranged pump units, and two coaxial with each other arranged pump units are coupled together by means of a coupling ⁇ unit. This is particularly preferred because the tensile forces that occur in the Auslich ⁇ ment through the operative connection between the high-pressure piston and the drive shaft and which can be transmitted to the carrier element ⁇ can be absorbed by the coupling unit.
  • the coupling unit each has a bearing associated with a pump unit and an armature, wherein the bearings and the armature are coupled together.
  • the A ⁇ is line occurring in the support element forces in the coupling unit easily realized.
  • the armature is designed as an expansion screw. This is particularly advantageous because it allows temperature-compensated length changes of the coupling unit to be compensated.
  • the pump units are hydraulically coupled to one another by a pipeline, the pipeline being arranged outside the carrier element, and one of the pump units having a connection element which is hydraulically coupled to the pipeline. This allows in particular simple way to avoid pressurization of the support member with high pressure.
  • Figure 1 is a schematic view of a high pressure pump in egg ⁇ ner first embodiment in a longitudinal section;
  • FIG. 2 shows a schematic view of the high-pressure pump in a cross section along the line II-II of FIG. 1,
  • Figure 3 is a perspective view of the high pressure pump
  • FIG. 4a detailed representations of the high-pressure pump.
  • the figures show a high-pressure pump 10 with a carrier element 12 and pump units 13, 13 a, which are arranged at an angle of 180 degrees to each other.
  • the high-pressure pump 10 has centrally a drive shaft 15, which is in operative connection with an eccentric ring 16 and rotatably mounted in a direction of rotation D counterclockwise in the carrier element 12 ( Figure 2).
  • a camshaft can be used as the drive shaft 15.
  • the number of conveyor and compression strokes can be specified by the number of cams become.
  • the number of conveying or compression strokes ⁇ corresponds to the number of the cams.
  • the pump units 13, 13a are constructed identically. To constricting in Fol ⁇ the pump unit 13 are described as representative of all pump units.
  • the pump unit 13 consists essentially of a Zylin ⁇ dergekoruse 14, a arranged in the cylinder housing 14 cylinder chamber 32, a high-pressure piston 30 and a spring 20.
  • the cylinder housing 14, the cylinder chamber 32, the high-pressure piston 30 and the spring 20 are coaxial angeord ⁇ to each other net.
  • the cylinder housing 14 is made of a metal, vorzugswei ⁇ se steel.
  • the high pressure piston 30 is axially movably mounted in the cylinder chamber 32 of the cylinder housing 14 and communicates with the Exzen ⁇ terring 16 in operative connection.
  • the high-pressure piston 30 is held by the spring 20, which is preferably se on Zylindergeophu ⁇ 14 and supported on the high-pressure piston 30 in constant contact with the eccentric ring sixteenth
  • the spring 20 which is preferably se on Zylindergeophu ⁇ 14 and supported on the high-pressure piston 30 in constant contact with the eccentric ring sixteenth
  • the cylinder chamber 32 In order to be able to fill the cylinder space 32 with fluid, it has a cylinder space supply line (not shown).
  • the cylinder chamber 32 further has a cylinder space drain line (not shown) through which fluid can be expelled from the cylinder space 32.
  • the cylinder housing 14 is coupled to the carrier element 12.
  • the carrier element 12 is formed from a plastic, wherein the carrier element is preferably formed as a plastic injection-molded part.
  • the support member 12 is formed in two parts in the illustrated embodiment, but may also be made in one piece or have more than two parts.
  • the plastic from which the carrier element 12 is formed a thermosetting plastic.
  • Thermosets are mechanically very strong load, in particular, they have a good tensile and compressive strength. It is particularly preferred if the plastic is a Vyncolit (Registered Trademark), which can be obtained from the company. Vyncolit NV. These materials have not only a good tensile and compressive strength but also a good temperature resistance.
  • Vyncolit X7320, a ge with glass fibers and minerals ⁇ filled phenolic molding compound with low thermal expansion coefficient ⁇ are particularly preferred, and Vyncolit BXE6952, a ver with glass fiber-reinforced phenol ⁇ molding material with very high elongation at break.
  • Vyncolite type Vintec (Re ⁇ gistered Trade Mark), in particular of types Vintec CF8030, a carbon fiber-reinforced phenolic molding composition and Vintec CF8050, a carbon fiber-reinforced phenolic molding composition, both of high tensile strength and compressive strength.
  • the fibers in the plastic are at least partially aligned in one direction.
  • the fibers should be oriented in the plastic so that the tensile and compressive forces that occur can be readily absorbed by the carrier element 12. It is thus achieved a particularly high compressive strength of the carrier element. Contains the plastic from which the carrier element is formed graphite, this is particularly advantageous since components made of such material may even run dry run the high-pressure pump 10 may still runflat.
  • the two coaxially arranged pump units 13, 13a of the high-pressure pump 10 are coupled to one another by means of one or more coupling units 40.
  • Each of the coupling units 40 has in each case one of the pump units 13, 13a associated bearing 42 which is disposed on an outer side 34 of one of the pump units 13, 13a.
  • Two bearing 42 are pelt 44 gekop ⁇ together by means of an anchor.
  • the use of the coupling unit 40 on two coaxially zueinan ⁇ arranged pump units 13, 13a can be applied arbitrarily to high-pressure pumps with an even number of pump units 13, 13a, wherein two pump units 13, 13a are arranged coaxially and at an angle of 180 degrees to each other ,
  • the support element preferably has (not shown) reinforcing elements, preferably reinforcing ribs and / or stiffeners. These make it possible to achieve a high mechanical stability of the carrier element 12, in particular with regard to its compressive and tensile strength.
  • a pipe 46 is arranged, through which the pump units 13, 13a are hydraulically coupled together.
  • the pipeline 46 is outside the support member 12 is arranged.
  • One of the pump units 13, 13 a has a connection element 48 which is hydraulically coupled to the pipe 46.
  • FIGS. 4 a and 4 b show detailed views of the high-pressure pump 10.
  • the carrier element 12 has a carrier element recess 36. It is thus possible threaded elements, preferably ⁇ a screw 38, as shown here for coupling the pump unit 13 a with the support member 12 to store precisely in the support member 12 ( Figure 4a).
  • a threaded insert 39 is arranged in the carrier element recess 36.
  • the threaded insert 39 can be sprayed directly at a ⁇ designed as a plastic injection molded part carrier element 12 with ⁇ .
  • the injection of the threaded insert 39 in the support member 12 is inexpensive to implement and the threaded insert 39 is mechanically highly resilient.
  • the high-pressure piston 30 By a rotational movement of the drive shaft 15 in a rotational direction D, the high-pressure piston 30 is moved by means of the eccentric ring 16 radially to the drive shaft 15. In this case, the cylinder chamber 32 is filled with fluid. As a result of the further rotational movement of the drive shaft 15, the high-pressure piston 30 is moved axially away from the drive shaft 15 by the eccentric ring 16 and compresses it in the cylinder space 32. ches fluid. The compressed fluid can finally, subsequent to the compression stroke via the pipe 46 will come out ⁇ . If the game, be a high-pressure fuel pump of an injection ⁇ system in the high-pressure pump 10 at ⁇ an internal combustion engine, so that highly pressurized fluid can be a high-pressure fuel accumulator, the reach so-called common rail.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

Pompe (10) à haute pression comprenant un élément (12) porteur, un arbre (15) d'entraînement logé de manière à pouvoir tourner dans l'élément (12) porteur, au moins une unité (13, 13a) de pompe pouvant être entraînée par l'arbre (15) d'entraînement et qui présente un boîtier (14) cylindrique avec un espace (32) cylindrique exposé à la haute pression lors d'une utilisation conformement à l'invention, boîtier dans lequel est disposé un piston (30) à haute pression mobile dans le sens axial qui est en liaison active avec l'arbre d'entraînement (15). Le boîtier (14) cylindrique est accouplé avec l'élément (12) porteur et l'élément (12) porteur est réalisé dans une matière plastique.
EP06841427A 2006-02-13 2006-12-18 Pompe à haute pression Ceased EP1987249B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610006555 DE102006006555B4 (de) 2006-02-13 2006-02-13 Hochdruckpumpe
PCT/EP2006/069838 WO2007093244A1 (fr) 2006-02-13 2006-12-18 Pompe à haute pression

Publications (2)

Publication Number Publication Date
EP1987249A1 true EP1987249A1 (fr) 2008-11-05
EP1987249B1 EP1987249B1 (fr) 2010-07-21

Family

ID=37772970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06841427A Ceased EP1987249B1 (fr) 2006-02-13 2006-12-18 Pompe à haute pression

Country Status (3)

Country Link
EP (1) EP1987249B1 (fr)
DE (2) DE102006006555B4 (fr)
WO (1) WO2007093244A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008007028A1 (de) 2008-01-31 2009-08-06 Continental Automotive Gmbh Hochdruckpumpe
DE102008001587A1 (de) * 2008-05-06 2009-11-12 Robert Bosch Gmbh Hochdruckkraftstoffpumpe zum Betrieb einer Brennkraftmaschine
DE102008057700A1 (de) * 2008-11-17 2010-05-20 Continental Mechanical Components Germany Gmbh Hochdruckpumpe
DE102008057699A1 (de) * 2008-11-17 2010-05-20 Continental Mechanical Components Germany Gmbh Hochdruckpumpe
DE102010011456A1 (de) * 2010-03-15 2011-09-15 Schaeffler Technologies Gmbh & Co. Kg Pumpe, insbesondere Kolbenpumpe für Hoch- oder Niederdruck
DE102010041213A1 (de) * 2010-09-22 2012-03-22 Robert Bosch Gmbh Hochdruckpumpe und Verfahren zum Herstellen eines Pumpengehäuses
DE102010041425A1 (de) * 2010-09-27 2012-03-29 Robert Bosch Gmbh Kraftstoffhochdruckpumpe
IT1402124B1 (it) * 2010-09-28 2013-08-28 Interpump Engineering Srl Una macchina idraulica a pistoni
DE102012211976B3 (de) * 2012-07-10 2013-11-07 Continental Automotive Gmbh Hochdruckpumpe

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4830573A (en) * 1988-01-06 1989-05-16 Gsw Inc. High pressure pump with plastic pump housing and heat sink
DE4016306A1 (de) * 1990-05-21 1991-11-28 Kitronic Mikrotech Radialkolbenpumpe
US5556267A (en) * 1993-02-05 1996-09-17 Hansen Engine Corporation Double acting pump
DE4320005C5 (de) * 1993-06-17 2008-03-27 Continental Teves Ag & Co. Ohg Elektrische Maschine zur Wandlung von elektrischer und mechanischer Energie, insbesondere radialkraftbeaufschlagter Elektromotor zum Antrieb von Pumpen
US5895207A (en) 1993-06-17 1999-04-20 Itt Automotive Europe, Gmbh Electric motor-pump assembly
DE4441522A1 (de) * 1994-11-22 1996-05-23 Schwaebische Huettenwerke Gmbh Schmiermittelpumpe
DE19532713C1 (de) * 1995-09-05 1997-02-06 Danfoss As Hydraulische Radialkolbenmaschine
DE19801146C1 (de) * 1998-01-14 1999-06-24 Kaercher Gmbh & Co Alfred Kolbenpumpe für ein Hochdruckreinigungsgerät
JP4088738B2 (ja) * 1998-12-25 2008-05-21 株式会社デンソー 燃料噴射ポンプ
EP1030059A1 (fr) * 1999-02-19 2000-08-23 Pressol Schmiergeräte GmbH Moteur pneumatique pour une pompe de graissage
DE10046315C2 (de) * 2000-09-19 2002-11-14 Siemens Ag Hochdruckpumpe für ein Speichereinspritzsystem sowie Speichereinspritzsystem
JP3871031B2 (ja) * 2001-11-21 2007-01-24 株式会社デンソー 燃料噴射ポンプ
DE10247142A1 (de) * 2002-10-09 2004-04-22 Robert Bosch Gmbh Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine

Non-Patent Citations (1)

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Title
See references of WO2007093244A1 *

Also Published As

Publication number Publication date
DE102006006555B4 (de) 2008-03-06
WO2007093244A1 (fr) 2007-08-23
EP1987249B1 (fr) 2010-07-21
DE102006006555A1 (de) 2007-08-16
DE502006007508D1 (de) 2010-09-02

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