EP0971120B1 - Connecting element for a high-pressure pipe - Google Patents
Connecting element for a high-pressure pipe Download PDFInfo
- Publication number
- EP0971120B1 EP0971120B1 EP99113229A EP99113229A EP0971120B1 EP 0971120 B1 EP0971120 B1 EP 0971120B1 EP 99113229 A EP99113229 A EP 99113229A EP 99113229 A EP99113229 A EP 99113229A EP 0971120 B1 EP0971120 B1 EP 0971120B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connection element
- element according
- cone
- sealing surface
- double cone
- 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
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/165—Filtering elements specially adapted in fuel inlets to injector
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
Definitions
- the invention relates to a connecting element of a high pressure line according to the Preamble of claim 1.
- connection element of a high-pressure line to provide an installation space in which a functional element Can be accommodated, which has a larger dimension than the cross section of the High pressure line.
- the invention uses a connecting element of a high pressure line, the High pressure line has an inner diameter d and a crowned or as an outer cone trained sealing surface and the connecting element cooperating therewith has formed as an inner cone sealing surface and a larger Cross section than the high pressure line and means are provided to High pressure line and connection element for sealing against each other in the axial direction to put under tension as known.
- US 4,111,370 A is a line connection between a fuel injector and shown a fuel line.
- the line connection includes a cylindrical one Bore and has a conical end piece on which the fuel line sealingly rests against a corresponding cone.
- a section of the bore of the A fuel filter is arranged in the line connection of the fuel flow.
- the object of the invention is a connection element which is improved in manageability specify.
- the insert part or several approaches, e.g. B. in the form of a circulating belt, which for Centering the insert part on part of the inner surface of the body of the Apply connection element.
- connection element According to an advantageous development of the connection element according to the invention, it is provided that an installation space for in the larger cross section of the connecting element Housing a functional element is formed.
- the installation space is preferably designed as a bore and has a diameter D, which is at least twice the inside diameter d of the high pressure line.
- the double cone preferably has the same cone angle inside and outside.
- the wall thickness t of the double cone is advantageously between 15 and 60%, preferably between 25 to 40% of a sealing ball radius R, which by the Distance of the line axis from the contact area between the sealing surface of the High pressure line and the cooperating sealing surface of the connection element is defined.
- the wall thickness t of the double cone is advantageously between 0.5 and 5 mm, preferably between 1 and 2.5 mm.
- the sealing sphere radius R is advantageously between 2 and 10 mm, preferably between 3 and 7 mm.
- the double cone can be made of a material with slight flexibility, in particular from a material with slight elasticity or from a material with minor ductility.
- connection element in which in the Connection element an installation space for accommodating a functional element is formed is, means are advantageously provided to close the functional component in the installation space hold.
- the means for holding the Functional elements an abutment shoulder provided on the body of the connecting element and comprise a system shoulder provided on the insert, between which the Functional element is kept under pressure.
- the on the body of the Connection element provided contact shoulder which continues the line course Flow cross section surrounds and forms a sealing surface to the functional element, wherein the functional element from the installation space to the flow cross section or vice versa is flowed through.
- connection element in which in the Connection element an installation space for accommodating a functional element is formed is, it can advantageously be provided that the outer contour of the Functional elements and the inner contour of the installation space are matched to one another, that a flow-free space remains around the functional element.
- a Flow connection between the inside of the double cone and the inside of the Body of the connecting element through one or more holes in the insert will be produced.
- connection element proves to be particularly advantageous as part of a Fuel injection system of an internal combustion engine.
- the connecting element as part of the housing Training fuel injector, being the supply of high pressure standing fuel to the fuel injector.
- the invention is particularly advantageous for applications in which the Functional element is a filter element, in particular a fuel filter.
- reference numeral 1 generally designates a connection element which the Connection of a high pressure line 16 to any device, which one Gaseous or liquid fluid is to be supplied or removed from it, or it serves the connection of high pressure lines to each other.
- connection element 1 part of the housing of a fuel injector in a fuel injection system for an internal combustion engine.
- high-pressure line 16 is designed as an outer cone Sealing surface 17 can be seen, the actual high-pressure line is not shown. Instead of A high-pressure line 16 can also have a sealing surface 17 designed as an outer cone have a spherical sealing surface.
- connection element 1 has a sealing surface 5 designed as an inner cone, which cooperates with the sealing surface 17 of the high pressure line 16.
- a sealing surface 5 designed as an inner cone, which cooperates with the sealing surface 17 of the high pressure line 16.
- These can consist of a union nut or other suitable means, as they are well known.
- the sealing surface 5 of the connecting element 1 designed as an inner cone is on one Double cone 4 formed, which is part of an insert 3, which is in the body 2 of the connecting element 1 can be used.
- the double cone 4 has on its outside a formed as an outer cone sealing surface 6, which with a body 2 of the Connection element 1 provided sealing surface 7 cooperates as an inner cone is trained.
- the tightness between the outer cone sealing surface 6 of the insert part 3 and the inner cone sealing surface 7 of the body 2 of the connection element 1 is also produced by the means which the high pressure line 16 and the connecting element 1st pressurize each other in the axial direction.
- the body 2 of the connection element 1 has a larger cross section in its interior than the cross section of the high pressure line 16, which is determined by the inner diameter d the same is specified.
- the expansion from the cross section of the high pressure line 16 to the cross section of the interior of the connection element 1 is through the double cone 4th bridged.
- connection element 1 the interior of the connection element 1 is as Installation space 8, which serves to accommodate a functional element 9, at which is a filter element in the illustrated embodiment Filtering of fuel supplied via the high-pressure line 16 as it flows from the high-pressure line 16 through the connecting element 1 in a the course of the High pressure line 16 continuing flow cross section 11 is.
- the installation space 8 of the connection element 1 is designed as a bore and has one Diameter D, which is larger than the inside diameter d of the high pressure line 16, preferably at least twice as large as this.
- the double cone 4 has the same cone angle inside and outside.
- the wall thickness t of the double cone 4 is 1.7 mm in the illustrated embodiment.
- the wall thickness t of the double cone 4 should be between 15 and 60%, preferably between 25 to 40% of a sealing ball radius R, which by the distance of the line axis from the contact area between the sealing surface 17 of the High-pressure line 16 and the sealing surface 5 interacting therewith Connection element 1 is defined.
- This contact area is ideally in the area the center of the sealing surface 5 of the double cone 4, as in the figure by the R designated arrow is shown.
- the wall thickness t of the double cone 4 is in absolute numbers between 0.5 and 5 mm, preferably between 1 and 2.5 mm.
- the Sealing ball radius R is in absolute numbers between 2 and 10 mm, preferably between 3 and 7 mm.
- the numbers mentioned are not to be understood as restrictive, however, prove to be advantageous areas with regard to the production of tightness both between the sealing surface 17 of the high pressure line 16 and that cooperating sealing surface 5 on the double cone 4 and between the Outer cone sealing surface 6 of the double cone 4 and the inner cone sealing surface 7 on the body 2 of the connecting element 1, which is equally reliable to manufacture.
- the material from which the double cone 4 is made is one in the field of Sealing technology usual material, usually a metallic material, it can however, plastic can also be used.
- the material may be minor Have flexibility due to elasticity or ductility.
- the functional component 9 is between one on the body 2 of the connecting element 1 provided shoulder 14 on the one hand and one provided on the insert part 3 System shoulder 13 on the other hand held under pressure.
- the body 2 of the connector 1 provided shoulder 14 surrounds the continuation of the line Flow cross section 11 and forms a sealing surface to the functional element 9, which through the installation space 8 to this flow cross section 11.
- the outer contour of the functional element 9 and the inner contour of the installation space 8 are so matched to each other that around the functional element 9 a flowable space 10 remains.
- Functional element 9 provided filter this means that the filter of the Installation space 8 through the free space 10 through the filter material to the Flow cross section 11 is flowed through.
- the insert 3 has a plurality of holes 12. In the illustrated Embodiment, these are four such bores 12, the axes of which are radial to Line axis run and are each offset by 90 °.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gasket Seals (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Lead Frames For Integrated Circuits (AREA)
- Wire Bonding (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
Description
Die Erfindung betrifft ein Anschlußelement einer Hochdruckleitung nach dem
Oberbegriff des Anspruchs 1.The invention relates to a connecting element of a high pressure line according to the
Preamble of
Bei einem Anschlußelement einer Hochdruckleitung besteht oft das Bedürfnis, eine Hochdruckleitung mit einem gegebenen Innendurchmesser bzw. Querschnitt mit einem Anschlußelement zu verbinden, das einen größeren Querschnitt als die Hochdruckleitung hat. Hierbei auftretende Dichtigkeitsprobleme kommen insbesondere zum Tragen bei Leitungssystemen, mit denen sehr hohe Drücke gehandhabt werden, wie es bei Einspritzsystemen von Brennkraftmaschinen der Fall ist.With a connecting element of a high-pressure line there is often a need for one High pressure line with a given inside diameter or cross section with a Connection element to connect, which has a larger cross section than the high pressure line Has. Leakage problems that occur here are particularly important Pipe systems with which very high pressures are handled, as is the case with Injection systems of internal combustion engines is the case.
Weiterhin besteht ein Bedürfnis, in einem Anschlußelement einer Hochdruckleitung einen Einbauraum zur Verfügung zu stellen, in welchem ein Funktionselement untergebracht werden kann, welches eine größere Abmessung als der Querschnitt der Hochdruckleitung hat.There is also a need for a connection element of a high-pressure line to provide an installation space in which a functional element Can be accommodated, which has a larger dimension than the cross section of the High pressure line.
Die Erfindung setzt ein Anschlußelement einer Hochdruckleitung, wobei die Hochdruckleitung einen Innendurchmesser d hat und eine ballig oder als Außenkonus ausgebildete Dichtfläche aufweist und das Anschlußelement eine damit zusammenwirkende als Innenkonus ausgebildete Dichtfläche aufweist und einen größeren Querschnitt als die Hochdruckleitung hat und Mittel vorgesehen sind, um Hochdruckleitung und Anschlußelement zur Abdichtung gegeneinander in Axialrichtung unter Spannung zu setzen, als bekannt voraus.The invention uses a connecting element of a high pressure line, the High pressure line has an inner diameter d and a crowned or as an outer cone trained sealing surface and the connecting element cooperating therewith has formed as an inner cone sealing surface and a larger Cross section than the high pressure line and means are provided to High pressure line and connection element for sealing against each other in the axial direction to put under tension as known.
Aus der gattungsbildenden US 5,169,182 A geht eine Abzweigleitung für eine Kraftstoffhochdruckleitung als bekannt hervor, bei der zwischen einem Anschlußstück mit einer als Außenkonus ausgebildeten Dichtfläche und einer als Innenkonus ausgebildeten Dichtfläche der Kraftstoffleitung ein Einsatzteil vorgesehen ist; das als Doppelkonusteil ausgebildet ist. Das Doppelkonusteil bildet ein Dichtelement, das unter Druck an den Dichtflächen von Kraftstoffleitung und Anschlußstück anliegt. From the generic US 5,169,182 A a branch line for a High-pressure fuel line emerges as known, in which with between a connector a sealing surface designed as an outer cone and one designed as an inner cone Sealing surface of the fuel line, an insert part is provided; that as a double cone part is trained. The double cone part forms a sealing element that is under pressure to the Sealing surfaces of the fuel line and connector are present.
In der US 4,111,370 A ist eine Leitungsverbindung zwischen einem Kraftstoffinjektor und einer Kraftstoffleitung dargestellt. Die Leitungsverbindung beinhaltet eine zylindrische Bohrung und besitzt ein konisch ausgebildetes Endstück, an dem die Kraftstoffleitung mit einem korrespondierenden Konus dichtend anliegt. In einem Abschnitt der Bohrung der Leitungsverbindung ist im Weg der Kraftstoffströmung ein Kraftstofffilter angeordnet.In US 4,111,370 A is a line connection between a fuel injector and shown a fuel line. The line connection includes a cylindrical one Bore and has a conical end piece on which the fuel line sealingly rests against a corresponding cone. In a section of the bore of the A fuel filter is arranged in the line connection of the fuel flow.
Die Aufgabe der Erfindung ist es, ein in der Handhabbarkeit verbessertes Anschlußelement anzugeben.The object of the invention is a connection element which is improved in manageability specify.
Diese Aufgabe wird durch das im Anspruch 1 angegebene Anschlußelement gelöst.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet. This object is achieved by the connecting element specified in
Bei einem Anschlußelement der vorausgesetzten Art ist es vorgesehen, daß die als Innenkonus ausgebildete Dichtfläche des Anschlußelements an einem als Doppelkonus ausgebildeten Bereich eines in den Körper des Anschlußelements einsetzbaren Einsatzteils vorgesehen ist, wobei der Doppelkonus des Einsatzteils eine als Außenkonus ausgebildete Dichtfläche aufweist, welche mit einer am Körper des Anschlußelements vorgesehenen, als Innenkonus ausgebildeten Dichtfläche zusammenwirkt, und wobei der Doppelkonus die Erweiterung vom Querschnitt der Hochdruckleitung auf den Querschnitt des Inneren des Anschlußelements überbrückt. Erfindungsgemäß ist vorgesehen, daß das Einsatzteil einen oder mehrere Ansätze, z. B. in Form eines umlaufenden Bandes aufweist, welche zur Zentrierung des Einsatzteils an einem Teil der Innenfläche des Körpers des Anschlußelements anliegen.In the case of a connecting element of the required type, it is provided that the as Inner cone formed sealing surface of the connecting element on a double cone trained area of an insert part insertable into the body of the connection element is provided, wherein the double cone of the insert part is designed as an outer cone Has sealing surface which with a provided on the body of the connecting element, designed as an inner cone cooperating sealing surface, and wherein the double cone Extension from the cross section of the high pressure line to the cross section of the inside of the Connection element bridged. According to the invention it is provided that the insert part or several approaches, e.g. B. in the form of a circulating belt, which for Centering the insert part on part of the inner surface of the body of the Apply connection element.
Gemäß einer vorteilhaften Weiterbildung des erfindungsgemäßen Anschlußelements ist es vorgesehen, daß in dem größeren Querschnitt des Anschlußelements ein Einbauraum zur Unterbringung eines Funktionselements ausgebildet ist.According to an advantageous development of the connection element according to the invention, it is provided that an installation space for in the larger cross section of the connecting element Housing a functional element is formed.
Vorzugsweise ist der Einbauraum als Bohrung ausgebildet und hat einen Durchmesser D, der mindestens doppelt so groß wie der Innendurchmesser d der Hochdruckleitung ist.The installation space is preferably designed as a bore and has a diameter D, which is at least twice the inside diameter d of the high pressure line.
Vorzugsweise weist der Doppelkonus innen und außen den gleichen Konuswinkel auf.The double cone preferably has the same cone angle inside and outside.
Die Wandstärke t des Doppelkonus beträgt vorteilhafterweise zwischen 15 bis 60 %, vorzugsweise zwischen 25 bis 40 % eines Dichtungskugelradius R, welcher durch den Abstand der Leitungsachse vom Kontaktbereich zwischen der Dichtfläche der Hochdruckleitung und der damit zusammenwirkenden Dichtfläche des Anschlußelements definiert ist.The wall thickness t of the double cone is advantageously between 15 and 60%, preferably between 25 to 40% of a sealing ball radius R, which by the Distance of the line axis from the contact area between the sealing surface of the High pressure line and the cooperating sealing surface of the connection element is defined.
Vorteilhafterweise beträgt die Wandstärke t des Doppelkonus zwischen 0,5 und 5 mm, vorzugsweise zwischen 1 und 2,5 mm.The wall thickness t of the double cone is advantageously between 0.5 and 5 mm, preferably between 1 and 2.5 mm.
Der Dichtungskugelradius R beträgt vorteilhafterweise zwischen 2 und 10 mm, vorzugsweise zwischen 3 und 7 mm. The sealing sphere radius R is advantageously between 2 and 10 mm, preferably between 3 and 7 mm.
Der Doppelkonus kann aus einem Material mit geringfügiger Nachgiebigkeit bestehen, insbesondere aus einem Material mit geringfügiger Elastizität oder aus einem Material mit geringfügiger Duktilität.The double cone can be made of a material with slight flexibility, in particular from a material with slight elasticity or from a material with minor ductility.
Bei Ausführungsformen des erfindungsgemäßen Anschlußelements, bei denen in dem Anschlußelement ein Einbauraum zur Unterbringung eines Funktionselements ausgebildet ist, sind vorteilhafterweise Mittel vorgesehen, um das Funktionsbauteil im Einbauraum zu halten.In embodiments of the connecting element according to the invention, in which in the Connection element an installation space for accommodating a functional element is formed is, means are advantageously provided to close the functional component in the installation space hold.
Gemäß einer vorteilhaften Weiterbildung hiervon können die Mittel zum Halten des Funktionselements eine am Körper des Anschlußelements vorgesehene Anlageschulter und eine am Einsatzteil vorgesehene Anlageschulter umfassen, zwischen denen das Funktionselement unter Pressung gehalten wird.According to an advantageous development thereof, the means for holding the Functional elements an abutment shoulder provided on the body of the connecting element and comprise a system shoulder provided on the insert, between which the Functional element is kept under pressure.
Gemäß einer anderen Weiterbildung kann es vorgesehen sein, daß die am Körper des Anschlußelements vorgesehene Anlageschulter einen den Leitungsverlauf fortsetzenden Strömungsquerschnitt umgibt und eine Dichtfläche zu dem Funktionselement bildet, wobei das Funktionselement vom Einbauraum zu dem Strömungsquerschnitt oder umgekehrt durchströmt wird.According to another development, it can be provided that the on the body of the Connection element provided contact shoulder which continues the line course Flow cross section surrounds and forms a sealing surface to the functional element, wherein the functional element from the installation space to the flow cross section or vice versa is flowed through.
Bei den Ausführungsformen des erfindungsgemäßen Anschlußelements, bei dem in dem Anschlußelement ein Einbauraum zur Unterbringung eines Funktionselements ausgebildet ist, kann es vorteilhafterweise vorgesehen sein, daß die Außenkontur des Funktionselements und die Innenkontur des Einbauraums so aufeinander abgestimmt sind, daß um das Funktionselement ein durchströmbarer Freiraum verbleibt.In the embodiments of the connection element according to the invention, in which in the Connection element an installation space for accommodating a functional element is formed is, it can advantageously be provided that the outer contour of the Functional elements and the inner contour of the installation space are matched to one another, that a flow-free space remains around the functional element.
Gemäß einer Ausführungsform der Erfindung kann es vorgesehen sein, daß eine Strömungsverbindung zwischen dem Inneren des Doppelkonus und dem Inneren des Körpers des Anschlußelements durch eine oder mehrere Bohrungen in dem Einsatzteil hergestellt wird. According to one embodiment of the invention, it can be provided that a Flow connection between the inside of the double cone and the inside of the Body of the connecting element through one or more holes in the insert will be produced.
Als besonders vorteilhaft erweist sich das Anschlußelement als Bestandteil eines Kraftstoffeinspritzsystems einer Brennkraftmaschine.The connection element proves to be particularly advantageous as part of a Fuel injection system of an internal combustion engine.
Insbesondere ist es von Vorteil, das Anschlußelement als Teil des Gehäuses eines Kraftstoffinjektors auszubilden, wobei es der Zuführung von unter hohem Druck stehendem Kraftstoff zu dem Kraftstoffinjektor dient.In particular, it is advantageous to have the connecting element as part of the housing Training fuel injector, being the supply of high pressure standing fuel to the fuel injector.
Bei den Ausführungsformen des erfindungsgemäßen Anschlußelements, bei dem das Anschlußelement einen Einbauraum zur Unterbringung eines Funktionselements aufweist, ist die Erfindung insbesondere von Vorteil für Anwendungen, bei denen das Funktionselement ein Filterelement, insbesondere ein Kraftstoffilter ist.In the embodiments of the connecting element according to the invention, in which the Connection element has an installation space for accommodating a functional element, the invention is particularly advantageous for applications in which the Functional element is a filter element, in particular a fuel filter.
Im folgenden wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert.
In der Figur bezeichnet Bezugsziffer 1 allgemein ein Anschlußelement, welches der
Verbindung einer Hochdruckleitung 16 mit einer beliebigen Einrichtung dient, welcher ein
gasförmiges oder flüssiges Fluid zuzuführen oder von dieser abzuführen ist, oder es dient
der Verbindung von Hochdruckleitungen untereinander. Bei dem dargestellten
Ausführungsbeispiel ist das Anschlußelement 1 Teil des Gehäuses eines Kraftstoffinjektors
in einem Kraftstoffeinspritzsystem für eine Brennkraftmaschine.In the figure,
Von der Hochdruckleitung 16 ist in der Figur lediglich eine als Außenkonus ausgebildete
Dichtfläche 17 zu sehen, die eigentliche Hochdruckleitung ist nicht dargestellt. Anstelle
einer als Außenkonus ausgebildeten Dichtfläche 17 kann die Hochdruckleitung 16 auch
eine ballig ausgebildete Dichtfläche aufweisen.In the figure, only one of the high-
Das Anschlußelement 1 verfügt über eine als Innenkonus ausgebildete Dichtfläche 5,
welche mit der Dichtfläche 17 der Hochdruckleitung 16 zusammenwirkt. Zur Herstellung
von Dichtigkeit zwischen der Dichtfläche 17 der Hochdruckleitung 16 und der Dichtfläche
5 des Anschlußelements 1 sind Mittel vorgesehen, um die Hochdruckleitung 16 und das
Anschlußelement 1 gegeneinander in Axialrichtung der Hochdruckleitung bzw. des
Anschlußelements unter Spannung zu setzen, welche in der Figur jedoch nicht dargestellt
sind. Diese können in einer Überwurfmutter oder in anderen geeigneten Mitteln bestehen,
wie sie wohlbekannt sind.The
Die als Innenkonus ausgebildete Dichtfläche 5 des Anschlußelements 1 ist an einem
Doppelkonus 4 ausgebildet, welcher Bestandteil eines Einsatzteils 3 ist, das in den Körper
2 des Anschlußelements 1 einsetzbar ist. Der Doppelkonus 4 weist an seiner Außenseite
eine als Außenkonus ausgebildete Dichtfläche 6 auf, welche mit einer am Körper 2 des
Anschlußelements 1 vorgesehenen Dichtfläche 7 zusammenwirkt, die als Innenkonus
ausgebildet ist. Die Dichtigkeit zwischen der Außenkonusdichtfläche 6 des Einsatzteils 3
und der Innenkonusdichtfläche 7 des Körpers 2 des Anschlußelements 1 wird ebenfalls
durch die Mittel hergestellt, welche die Hochdruckleitung 16 und das Anschlußelement 1
gegeneinander in Axialrichtung unter Druck setzen.The sealing
Der Körper 2 des Anschlußelements 1 hat in seinem Inneren einen größeren Querschnitt
als der Querschnitt der Hochdruckleitung 16, welcher durch den Innendurchmesser d
derselben vorgegeben ist. Die Erweiterung vom Querschnitt der Hochdruckleitung 16 auf
den Querschnitt des Inneren des Anschlußelements 1 wird durch den Doppelkonus 4
überbrückt.The body 2 of the
Bei dem dargestellten Ausführungsbeispiel ist das Innere des Anschlußelements 1 als
Einbauraum 8 ausgeführt, welcher der Unterbringung eines Funktionselements 9 dient, bei
welchem es sich in dem dargestellten Ausführungsbeispiel um ein Filterelement zur
Filterung von über die Hochdruckleitung 16 zugeführtem Kraftstoff bei dessen Strömen
von der Hochdruckleitung 16 durch das Anschlußelement 1 in einen den Verlauf der
Hochdruckleitung 16 fortsetzenden Strömungsquerschnitt 11 handelt.In the illustrated embodiment, the interior of the
Der Einbauraum 8 des Anschlußelements 1 ist als Bohrung ausgebildet und hat einen
Durchmesser D, der größer als der Innendurchmesser d der Hochdruckleitung 16,
vorzugsweise mindestens doppelt so groß wie dieser ist.The installation space 8 of the
Der Doppelkonus 4 weist innen und außen den gleichen Konuswinkel aus. Die Wandstärke
t des Doppelkonus 4 beträgt bei dem darstellten Ausführungsbeispiel 1,7 mm.
Erfindungsgemäß soll die Wandstärke t des Doppelkonus 4 zwischen 15 und 60 %,
vorzugsweise zwischen 25 bis 40 % eines Dichtungskugelradius R betragen, welcher durch
den Abstand der Leitungsachse vom Kontaktbereich zwischen der Dichtfläche 17 der
Hochdruckleitung 16 und der damit zusammenwirkenden Dichtfläche 5 des
Anschlußelements 1 definiert ist. Dieser Kontaktbereich liegt idealerweise etwa im Bereich
der Mitte der Dichtfläche 5 des Doppelkonus 4, wie in der Figur durch den mit R
bezeichneten Pfeil dargestellt ist. Die Wandstärke t des Doppelkonus 4 beträgt in
absoluten Zahlen zwischen 0,5 und 5 mm, vorzugsweise zwischen 1 und 2,5 mm. Der
Dichtungskugelradius R beträgt in absoluten Zahlen zwischen 2 und 10 mm, vorzugsweise
zwischen 3 und 7 mm. Die genannten Zahlen sind nicht einschränkend zu verstehen,
erweisen sich jedoch als vorteilhafte Bereiche in Bezug auf die Herstellung von Dichtigkeit
sowohl zwischen der Dichtfläche 17 der Hochdruckleitung 16 und der damit
zusammenwirkenden Dichtfläche 5 am Doppelkonus 4 als auch zwischen der
Außenkonusdichtfläche 6 des Doppelkonus 4 und der Innenkonusdichtfläche 7 am Körper
2 des Anschlußelements 1, welche gleichermaßen zuverlässig herzustellen ist.The double cone 4 has the same cone angle inside and outside. The wall thickness
t of the double cone 4 is 1.7 mm in the illustrated embodiment.
According to the invention, the wall thickness t of the double cone 4 should be between 15 and 60%,
preferably between 25 to 40% of a sealing ball radius R, which by
the distance of the line axis from the contact area between the sealing surface 17 of the
High-
Das Material, aus welchem der Doppelkonus 4 hergestellt wird, ist ein auf dem Gebiet der Dichtungstechnik übliches Material, üblicherweise ein metallisches Material, es kann jedoch auch Kunststoff in Frage kommen. Das Material kann eine geringfügige Nachgiebigkeit aufgrund von Elastizität oder Duktilität haben. The material from which the double cone 4 is made is one in the field of Sealing technology usual material, usually a metallic material, it can however, plastic can also be used. The material may be minor Have flexibility due to elasticity or ductility.
Das Funktionsbauteil 9 wird zwischen einer am Körper 2 des Anschlußelements 1
vorgesehenen Anlageschulter 14 einerseits und einer am Einsatzteil 3 vorgesehenen
Anlageschulter 13 andererseits unter Pressung gehalten. Die am Körper 2 des Anschlußelements
1 vorgesehene Anlageschulter 14 umgibt den den Leitungsverlauf fortsetzenden
Strömungsquerschnitt 11 und bildet eine Dichtfläche zu dem Funktionselement 9, welches
vom Einbauraum 8 zu diesem Strömungsquerschnitt 11 durchströmt wird. Die
Außenkontur des Funktionselements 9 und die Innenkontur des Einbauraums 8 sind so
aufeinander abgestimmt, daß um das Funktionselement 9 ein durchströmbarer Freiraum
10 verbleibt. Im Falle des bei dem beschriebenen Ausführungsbeispiel als
Funktionselement 9 vorgesehenen Filters bedeutet dies, daß das Filter von dem
Einbauraum 8 über den Freiraum 10 durch das Filtermaterial hindurch zu dem
Strömungsquerschnitt 11 durchströmt wird.The functional component 9 is between one on the body 2 of the connecting
Zur Herstellung einer Strömungsverbindung zwischen der Hochdruckleitung 16 und dem
Einbauraum 8 weist das Einsatzteil 3 mehrere Bohrungen 12 auf. Bei dem dargestellten
Ausführungsbeispiel sind dies vier derartige Bohrungen 12, deren Achsen radial zur
Leitungsachse verlaufen und jeweils um 90° gegeneinander versetzt sind.To establish a flow connection between the
Weiterhin ist an dem Einsatzteil 3 ein Ansatz 15 in Form eines in Umfangsrichtung
verlaufenden Bundes vorgesehen, welcher der Zentrierung des Einsatzteils 3 im Körper 2
des Anschlußelements 1 dient und an der Innenfläche des Einbauraums 8 anliegt. Furthermore, there is an extension 15 on the
- 11
- Anschlußelementconnecting element
- 22
- Körperbody
- 33
- Einsatzteilinsert
- 44
- Doppelkonusdouble cone
- 55
- Dichtfläche (Innenkonus)Sealing surface (inner cone)
- 66
- Dichtfläche (Außenkonus)Sealing surface (outer cone)
- 77
- Dichtfläche (Innenkonus)Sealing surface (inner cone)
- 88th
- Einbaurauminstallation space
- 99
- Funktionselementfunctional element
- 1010
- Freiraumfree space
- 1111
- StrömungsquerschnittFlow area
- 1212
- Durchflußbohrungflow bore
- 1313
- Anlageschultercontact shoulder
- 1414
- Anlageschultercontact shoulder
- 1515
- Ansatzapproach
- 1616
- HochdruckleitungHigh-pressure line
- 1717
- Dichtfläche (Außenkonus)Sealing surface (outer cone)
Claims (18)
- Connection element of a high-pressure conduit, the high-pressure conduit (16) having an inside diameter d and having a sealing surface (17) of convex design or designed as an outer cone, and the connection element (1) having a sealing surface (5) cooperating therewith and designed as an inner cone and, inside it, having a larger cross section than the high-pressure conduit (16), which cross section is predefined by the inside diameter d of said conduit, furthermore the sealing surface (5), designed as an inner cone, of the connection element (1) being provided on a region, designed as double cone (4), of an insert part (3) capable of being inserted into a body (2) of the connection element (1), the double cone (4) of the insert part (3) having a sealing surface (6) which is designed as an outer cone and which cooperates with a sealing surface (7) provided on the body (2) of the connection element (1) and designed as an inner cone, and the double cone (4) bridging the widening from the cross section of the high-pressure conduit (16) to the cross section of the inside of the connection element (1), and means being provided in order to put the high-pressure conduit (16) and the connection element (1) under tension in the axial direction for sealing off relative to one another, characterized in that the insert part (3) has one or more extensions (15) which come to bear on a part of the inner surface of the body (2) of the connection element (1) for the purpose of centring the insert part (3).
- Connection element according to Claim 1, characterized in that an installation space (8) for accommodating a functional element (9) is formed in the larger cross section of the connection element (1).
- Connection element according to Claim 2, characterized in that the installation space (8) is designed as a bore and has a diameter D which is at least twice as large as the inside diameter d of the high-pressure conduit (16).
- Connection element according to Claim 1, 2 or 3, characterized in that the double cone (4) has the same cone angle on the inside and on the outside.
- Connection element according to one of Claims 1 to 4, characterized in that the wall thickness t of the double cone (4) is between 15 and 60%, preferably between 25 and 40%, of a sealing-sphere radius R which is defined by the distance of the conduit axis from the contact region between the sealing surface (17) of the high-pressure conduit (16) and the sealing surface (5), cooperating therewith, of the connection element.
- Connection element according to one of Claims 1 to 5, characterized in that the wall thickness t of the double cone (4) is between 0.5 and 5 mm, preferably between 1 and 2.5 mm.
- Connection element according to Claim 5 or 6, characterized in that the sealing-sphere radius R is between 2 and 10 mm, preferably between 3 and 7 mm.
- Connection element according to one of Claims 1 to 7, characterized in that the double cone (4) consists of a material having insignificant flexibility.
- Connection element according to Claim 8, characterized in that the double cone (4) consists of a material having insignificant elasticity.
- Connection element according to Claim 8, characterized in that the double cone (4) consists of a material having insignificant ductility.
- Connection element according to Claim 2, characterized in that means (13, 14) are provided in order to hold the functional component (9) in the installation space (8).
- Connection element according to Claim 11, characterized in that the means (13, 14) for holding the functional element (9) comprise a bearing shoulder (14) provided on the body (2) of the connection element (1) and a bearing shoulder (13) provided on the insert part (3), the functional element (9) being held under pressure between the said bearing shoulders.
- Connection element according to Claim 12, characterized in that the bearing shoulder (14) provided on the body (2) of the connection element (1) surrounds a flow cross section (11) continuing the run of the conduit and forms a sealing surface relative to the functional element (9), the flow passing through the functional element (9) from the installation space (8) to the flow cross section (11) or vice versa.
- Connection element according to one of Claims 2 or 11 to 13, characterized in that the outer contour of the functional element (9) and the inner contour of the installation space (8) are coordinated with one another in such a way that a free space (10) through which the flow is capable of passing remains around the functional element (9).
- Connection element according to one of Claims 1 to 14, characterized in that the insert part (3) has one or more bores (12) making a flow connection between the inside of the double cone (4) and the inside of the body (2) of the connection element (1).
- Connection element according to one of Claims 1 to 15, characterized in that the connection element (1) is an integral part of a fuel injection system of an internal combustion engine.
- Connection element according to Claim 16, characterized in that the connection element (1) is designed as part of the housing of a fuel injector and serves for supplying fuel which is under high pressure to the fuel injector.
- Connection element according to one of Claims 2 or 11 to 14, characterized in that the functional element (9) is a filter element, in particular a fuel filter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19831080A DE19831080A1 (en) | 1998-07-10 | 1998-07-10 | Connection element for a high pressure line |
| DE19831080 | 1998-07-10 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0971120A2 EP0971120A2 (en) | 2000-01-12 |
| EP0971120A3 EP0971120A3 (en) | 2001-08-01 |
| EP0971120B1 true EP0971120B1 (en) | 2003-03-12 |
Family
ID=7873709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99113229A Expired - Lifetime EP0971120B1 (en) | 1998-07-10 | 1999-07-08 | Connecting element for a high-pressure pipe |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0971120B1 (en) |
| AT (1) | ATE234427T1 (en) |
| DE (2) | DE19831080A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6840268B2 (en) * | 2002-05-23 | 2005-01-11 | Detroit Diesel Corporation | High-pressure connector having an integrated flow limiter and filter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4111370A (en) * | 1977-04-08 | 1978-09-05 | Caterpillar Tractor Co. | Fuel inlet fitting for a fuel injection nozzle |
| JP2529032Y2 (en) * | 1990-05-22 | 1997-03-12 | 臼井国際産業株式会社 | Connection structure of branch pipe in high pressure fuel manifold |
| JPH0642428A (en) * | 1992-07-20 | 1994-02-15 | Usui Internatl Ind Co Ltd | High pressure fuel injection pipe and manufacture thereof |
-
1998
- 1998-07-10 DE DE19831080A patent/DE19831080A1/en not_active Withdrawn
-
1999
- 1999-07-08 DE DE59904514T patent/DE59904514D1/en not_active Expired - Fee Related
- 1999-07-08 AT AT99113229T patent/ATE234427T1/en not_active IP Right Cessation
- 1999-07-08 EP EP99113229A patent/EP0971120B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0971120A3 (en) | 2001-08-01 |
| DE59904514D1 (en) | 2003-04-17 |
| DE19831080A1 (en) | 2000-01-13 |
| EP0971120A2 (en) | 2000-01-12 |
| ATE234427T1 (en) | 2003-03-15 |
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