EP1369879A2 - High-pressure lead-throughs for insulating components of pressure vessel walls - Google Patents

High-pressure lead-throughs for insulating components of pressure vessel walls Download PDF

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Publication number
EP1369879A2
EP1369879A2 EP03011877A EP03011877A EP1369879A2 EP 1369879 A2 EP1369879 A2 EP 1369879A2 EP 03011877 A EP03011877 A EP 03011877A EP 03011877 A EP03011877 A EP 03011877A EP 1369879 A2 EP1369879 A2 EP 1369879A2
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EP
European Patent Office
Prior art keywords
insulating body
conical
pressure
pressure vessel
vessel wall
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
EP03011877A
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German (de)
French (fr)
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EP1369879B1 (en
EP1369879A3 (en
Inventor
Erhard Dr.-Ing. Altstadt
Horst Dr.-Ing. Hansch
Marcus Schnyder
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Il Metronic Sensortechnik Ilmenau GmbH
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Il Metronic Sensortechnik Ilmenau GmbH
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Publication of EP1369879A3 publication Critical patent/EP1369879A3/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/30—Sealing
    • H01B17/303—Sealing of leads to lead-through insulators
    • H01B17/305—Sealing of leads to lead-through insulators by embedding in glass or ceramic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/30—Sealing
    • H01B17/301—Sealing of insulators to support

Definitions

  • the invention relates to electrical bushings on insulating Components of a pressure vessel wall, in particular for housings from Pressure sensors and a method for their production.
  • US-A-4 816 621 describes a ceramic-metal bushing Gold solder connection, which is used for implantable cardiac pacemakers or Nerve stimulators are provided for high pressure application, however is unsuitable.
  • JP 59 078 983 "Ceramic and metal joint mechanism" conical rotor-shaft connection described.
  • the invention is based, a method and a task Specify device of the type mentioned, in which an increased Pressure resistance is guaranteed and only a small drop in Temperature increase occurs.
  • the object is achieved by methods which and 8 specified features and with an arrangement which the in Contains specified features, solved.
  • a truncated cone-shaped insulating body which sits in a conical receptacle under high radial compressive stress, withstands high pneumatic or hydraulic working pressures on its base.
  • a high material pressure resistance (from 200 MPa) of the insulating body ensures the pressure resistance of the bushing.
  • the resistance of the lead-through conductors inserted into the insulating body to thermal and mechanical load changes is achieved by using material with a high modulus of elasticity, which is significantly higher than that of metals and greater than 250 GPa.
  • insulating bodies made of high-strength Al 2 O 3 ceramic which fulfills the aforementioned material properties, has a half cone angle of 2-4 ° and is fastened in the lead-through conductor with hard solder.
  • the required radial compressive stress can be achieved by shrinking on, by preheating a conical holder made of high-strength steel by 200 to 300 K compared to the ambient temperature and inserting the insulating body, which remains at ambient temperature, into the conical holder under slight pressure. After the temperature equalization, the insulating body is under radial compressive stress, which increases due to the effect of the cone angle when the working pressure is applied.
  • An advantageous embodiment of the arrangement according to the invention arises in that when soldering lead-through conductors, in particular from Feed-through wires with a maximum diameter of 0.8 mm, the ceramic insulating body is provided with stepped through holes, with the larger diameter of the through holes on the high pressure side is arranged, and the lead-through wires a reinforced middle part own, this middle part after soldering in at the level of remote through hole.
  • Feed-through conductors especially for feed-through pins with a Diameter of at least 1.0 mm
  • conical Through holes of the insulator have through holes that are half Have a cone angle of 4 - 8 °.
  • the cone angle opens after the High pressure side.
  • Feedthrough pins are also in this cone conical middle part arranged firmly, the cone angle equal to or around 0.5 - 1 ° smaller than the cone angle of the through holes.
  • the feed-through pins are inserted in that the Remaining feed-through pins in the conical Through holes are inserted at a time when the Insulator is essentially the temperature of the conical receptacle but has not yet approximated the ambient temperature.
  • the ceramic insulating body with its internal and external metal partners, i.e. the Implementation pins or the conical receptacle
  • the Implement pins at least on their middle part and / or the Pressure vessel wall at least in its conical receptacle with a ductile metallic coating.
  • This can be done, for example a galvanically applied copper layer of 5 - 20 ⁇ m, which by annealing was homogenized at 950 - 1000 ° C, are used.
  • FIG. 1 shows a section through a bushing arrangement.
  • a conical receptacle 4 made of stainless steel is located in a pressure vessel wall 3.
  • the receptacle 4 has an outer diameter of 16 mm.
  • a conical insulating body 1 made of high-strength Al 2 O 3 ceramic with a height of 5 mm, an average diameter of 8 mm and a half cone angle of 3 °, in which a lead-through conductor 2 is hard soldered.
  • the receptacle 4 is shrunk onto the insulating body 1. It could be demonstrated experimentally that the procedure thus produced has a pressure resistance of more than 4000 bar at a temperature of 400 ° C.
  • FIG. 2 explains various fastening options for the arrangement of the feed-through conductor 2 in the conical insulating body 1.
  • a conical through hole 5 with a half cone angle of 5 ° is made in the conical insulating body 1.
  • a bushing pin 6 fastened by shrinking on, with a conical central part 7, which has an average diameter of 1.2 mm and a half cone angle of 4.5 °.
  • the conical insulating body 1 is included a stepped through hole 9, in which a grommet 10 is introduced with a reinforced central part 11.
  • the through hole 9 is with with a diameter of 0.5 mm and a heel of Diameter 1.0 mm and a height of 1.5 mm.
  • the Feed-through wires 10 have a diameter of 0.45 mm and are with a reinforced middle part 11 with a diameter of 0.8 mm and with a height of 0.3 mm. You are using a copper silver solder that has a 10% titanium content, hard soldered into the insulating body 1.
  • the sectional view shown in FIG. 3 shows a section of a pressure vessel wall 3 with a conical receptacle 4.
  • the receptacle 4 contains the conical insulating body 1 shown in half section, which in turn is provided with a conical through-hole in which there is a conical middle part 7 provided through pin 6 is attached.
  • both the outer surface of the conical middle part 7 of the lead-through pin 6 and the inner surface of the conical receptacle 4 of the pressure vessel wall 3 are provided with ductile metallic coatings 8.
  • a galvanically applied and homogenized copper layer of approx. 10 ⁇ m thickness is applied here as the ductile metallic coating 8.
  • the conical insulating body 1 is connected via the ductile metallic coatings 8 to the vessel wall 3 or the bushing pins 6 by shrinking on. The arrangement thus forms a hermetic, pressure and temperature-resistant bushing.

Abstract

The pressure vessel wall (3) has a conical opening (4) in which an externally conical insulating body (1), in which one or more electrically conducting lead-through conductors (2) are fixed, is inserted. The cone angles of the conical opening and of the insulating body are open towards the high pressure side. The conical insulating body consists of highly resistant Al2O3 ceramic and has a half cone angle of 2-4 degrees. AN Independent claim is also included for the following: (a) a method of manufacturing an inventive high-pressure lead-through.

Description

Die Erfindung betrifft elektrische Durchführungen an isolierenden Bestandteilen einer Druckgefäßwandung, insbesondere für Gehäuse von Drucksensoren und ein Verfahren zu ihrer Herstellung.The invention relates to electrical bushings on insulating Components of a pressure vessel wall, in particular for housings from Pressure sensors and a method for their production.

Im Stand der Technik sind elektrische Durchführungen an isolierenden Bestandteilen von Gefäßwandungen in verschiedenen Ausführungen bekannt.In the prior art, electrical bushings on insulating Components of vessel walls known in various designs.

US-A- 4 816 621 beschreibt eine Keramik-Metall-Durchführung mit Goldlot-Verbindung, die für implantierbare Herz-Schrittmacher bzw. Nerven-Stimulatoren vorgesehen ist, für Hochdruck-Anwendung jedoch ungeeignet ist.US-A-4 816 621 describes a ceramic-metal bushing Gold solder connection, which is used for implantable cardiac pacemakers or Nerve stimulators are provided for high pressure application, however is unsuitable.

Ferner ist in US-A-3 975 579 eine elektrische Durchführung für hohe Druckunterschiede angegeben, bei der ein Kunstharz-Körper verwendet wird, dessen Kontur eine konische Fläche besitzt. Für erhöhte Temperaturen ist diese Anordnung nicht einsetzbar.Also in US-A-3,975,579 is an electrical feedthrough for high Specified pressure differences using a synthetic resin body, whose contour has a conical surface. For elevated temperatures this arrangement cannot be used.

Bekannt ist auch die Belotung mit Aktivlot zur Herstellung einer Keramik-Metall-Verbindung. In verschiedenen Literaturstellen, wie "Herstellung hochtemperaturbeständiger Keramik-Metall-Lötverbindungen unter Vormetallisierung der Keramik mit Aktivlot" von N. Munasinghe oder in VDI-Fortschrittsberichten, Reihe 2, Fertigungstechnik, Nr. 382 "Löten von Keramik-Keramik und Keramik-Metall-Verbindungen '96" und in zahlreichen Forschungsberichten werden Verbindungsmechanismen, Festigkeitsprüfungen und anwendungsorientierte Modifikationen näher untersucht.Also known is the brazing with active solder for the production of a Ceramic-metal connection. In various references, such as "Manufacture of high-temperature resistant ceramic-metal solder connections with pre-metallization of the ceramic with active solder "by N. Munasinghe or in VDI Progress Reports, Series 2, Manufacturing Technology, No. 382 "Soldering from Ceramic-ceramic and ceramic-metal connections '96 "and in numerous Research reports become connection mechanisms, strength tests and application-oriented modifications examined in more detail.

DE 100 55 910 A1 beschreibt ein Verfahren zur Herstellung einer Keramik-Metall-Verbindung, wobei eine aktive Lotkomponente auf die Keramik und das zu verbindende Metall auf die Oberfläche aufgebracht wird. Hier bewirkt ein Stromfluss durch die Übergangsstelle die gewünschte Verbindung.DE 100 55 910 A1 describes a method for producing a Ceramic-metal connection, with an active solder component on the Ceramic and the metal to be joined is applied to the surface. Here a current flow through the transition point has the desired effect Connection.

Weiter ist in JP 59 078 983 "Ceramic and metal joint mechanism" eine konische Rotor-Schaft-Verbindung beschrieben.Furthermore, JP 59 078 983 "Ceramic and metal joint mechanism" conical rotor-shaft connection described.

Bei den bekannten Verfahren und Anordnungen ist nachteilig, dass an den elektrischen Durchführungen, insbesondere an Druckglasdurchführungen für Drucksensoren, unter der Wirkung des Betriebsdruckes auf die Bestandteile der Druckgefäße ihre Festigkeit nachlässt und dadurch ihre Druckbeständigkeit beschränkt wird.In the known methods and arrangements, it is disadvantageous that the electrical feedthroughs, in particular on pressure glass feedthroughs for Pressure sensors, under the effect of the operating pressure on the components the pressure vessels lose their strength and thus their pressure resistance is restricted.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung der eingangs genannten Art anzugeben, bei dem eine erhöhte Druckbeständigkeit gewährleistet wird und nur ein geringer Abfall bei Temperaturerhöhung auftritt.The invention is based, a method and a task Specify device of the type mentioned, in which an increased Pressure resistance is guaranteed and only a small drop in Temperature increase occurs.

Erfindungsgemäß wird die Aufgabe mit Verfahren, welche die in Anspruch 7 und 8 angegebenen Merkmale und mit einer Anordnung, welche die in Anspruch 1 angegebenen Merkmale enthält, gelöst.According to the invention, the object is achieved by methods which and 8 specified features and with an arrangement which the in Contains specified features, solved.

Vorteilhafte Ausgestaltungen sind in den Unteransprüchen angegeben. Advantageous configurations are specified in the subclaims.

Es konnte bei Untersuchungen an hochdruckfesten Durchführungen nachgewiesen werden, dass ein kegelstumpfförmiger Isolierkörper, der in einer konischen Aufnahme unter hoher radialer Druckspannung sitzt, hohen pneumatischen oder hydraulischen Arbeitsdrücken auf seine Grundfläche widersteht. Eine hohe Material-Druckfestigkeit (ab 200 MPa) des Isolierkörpers gewährleistet dabei die Druckbeständigkeit der Durchführung. Die Beständigkeit haftfest in den Isolierkörper eingebrachter Durchführungsleiter gegenüber thermischen und mechanischen Lastwechseln wird durch Einsatz von Material mit hohem Elastizitätsmodul, der deutlich über den von Metallen liegt und größer als 250 GPa ist, erreicht.
Besonders vorteilhaft ist es, Isolierkörper aus hochfester Al2O3-Keramik zu verwenden, der die vorgenannten Materialeigenschaften erfüllt, einen halben Konuswinkel von 2 - 4° aufweist und in dem Durchführungsleiter mit Hartlot befestigt sind. Die erforderliche radiale Druckspannung kann durch Aufschrumpfen erreicht werden, indem eine konische Aufnahme aus hochfestem Stahl um 200 bis 300 K gegenüber Umgebungstemperatur vorgewärmt und der auf Umgebungstemperatur verbliebene Isolierkörper unter leichtem Druck in die konische Aufnahme eingesetzt wird. Nach dem Temperaturausgleich steht der Isolierkörper unter radialer Druckspannung, die sich infolge der Wirkung des Konuswinkels bei Anliegen des Arbeitsdruckes noch verstärkt. Damit ergibt sich zwischen dem Isolierkörper und der konischen Aufnahme eine hermetische Verbindung, die auch bei erhöhten Temperaturen hohen Arbeitsdrücken Stand hält. Dabei ist es vorteilhaft, das Hartlot zur Befestigung von Durchführungsleitern in den Durchgangslöchern des keramischen Isolierkörpers mit einem Titangehalt von 3-12% zu versehen und Al2O3-Keramik zu verwenden, die eine Glasphase von ca. 0,5% besitzt.In tests on high-pressure-resistant bushings, it could be demonstrated that a truncated cone-shaped insulating body, which sits in a conical receptacle under high radial compressive stress, withstands high pneumatic or hydraulic working pressures on its base. A high material pressure resistance (from 200 MPa) of the insulating body ensures the pressure resistance of the bushing. The resistance of the lead-through conductors inserted into the insulating body to thermal and mechanical load changes is achieved by using material with a high modulus of elasticity, which is significantly higher than that of metals and greater than 250 GPa.
It is particularly advantageous to use insulating bodies made of high-strength Al 2 O 3 ceramic which fulfills the aforementioned material properties, has a half cone angle of 2-4 ° and is fastened in the lead-through conductor with hard solder. The required radial compressive stress can be achieved by shrinking on, by preheating a conical holder made of high-strength steel by 200 to 300 K compared to the ambient temperature and inserting the insulating body, which remains at ambient temperature, into the conical holder under slight pressure. After the temperature equalization, the insulating body is under radial compressive stress, which increases due to the effect of the cone angle when the working pressure is applied. This results in a hermetic connection between the insulating body and the conical receptacle, which can withstand high working pressures even at elevated temperatures. It is advantageous to provide the brazing solder for fastening lead-through conductors in the through holes of the ceramic insulating body with a titanium content of 3-12% and to use Al 2 O 3 ceramic, which has a glass phase of approx. 0.5%.

Eine vorteilhafte Ausführung der erfindungsgemäßen Anordnung entsteht dadurch, dass beim Einlöten von Durchführungsleitern, insbesondere von Durchführungsdrähten mit einem Durchmesser von maximal 0,8 mm, der keramische Isolierkörper mit abgesetzten Durchgangslöchern versehen ist, wobei der größere Durchmesser der Durchgangslöcher auf der Hochdruckseite angeordnet ist, und die Durchführungsdrähte ein verstärktes Mittelteil besitzen, wobei dieses Mittelteil nach dem Einlöten auf der Stufe des abgesetzten Durchgangsloches aufsitzt.An advantageous embodiment of the arrangement according to the invention arises in that when soldering lead-through conductors, in particular from Feed-through wires with a maximum diameter of 0.8 mm, the ceramic insulating body is provided with stepped through holes, with the larger diameter of the through holes on the high pressure side is arranged, and the lead-through wires a reinforced middle part own, this middle part after soldering in at the level of remote through hole.

Eine weitere geeignete Anordnung bei der Befestigung von Durchführungsleitern , die besonders für Durchführungsstifte mit einem Durchmesser von mindestens 1,0 mm vorteilhaft ist, weist in konischen Durchgangslöchern des Isolierkörpers Durchgangslöcher auf, die einen halben Konuswinkel von 4 - 8° besitzen. Der Konuswinkel öffnet sich dabei nach der Hochdruckseite hin. In diesem Konus sind Durchführungsstifte mit ebenfalls konischem Mittelteil haftfest angeordnet, deren Konuswinkel gleich oder um 0,5 - 1° kleiner als der Konuswinkel der Durchgangslöcher ist. Das Einbringen der Durchführungsstifte erfolgt dabei dadurch, dass die auf Umgebungstemperatur verbliebenen Durchführungsstifte in die konischen Durchgangslöcher zu einem Zeitpunkt eingesetzt werden, zu dem der Isolierkörper sich im wesentlichen der Temperatur der konischen Aufnahme aber noch nicht der Umgebungstemperatur angenähert hat.Another suitable arrangement when attaching Feed-through conductors, especially for feed-through pins with a Diameter of at least 1.0 mm is advantageous, shows in conical Through holes of the insulator have through holes that are half Have a cone angle of 4 - 8 °. The cone angle opens after the High pressure side. Feedthrough pins are also in this cone conical middle part arranged firmly, the cone angle equal to or around 0.5 - 1 ° smaller than the cone angle of the through holes. The The feed-through pins are inserted in that the Remaining feed-through pins in the conical Through holes are inserted at a time when the Insulator is essentially the temperature of the conical receptacle but has not yet approximated the ambient temperature.

Vorteilhaft für die hermetische Verbindung des keramischen Isolierkörpers mit seinen innen und außen angeordneten Metallpartnern, also den Durchführungsstiften bzw. der konischen Aufnahme, ist es, insbesondere bei keramischen Isolierkörpern mit ungeschliffenen Konusflächen, die Durchführungsstifte mindestens auf ihrem Mittelteil und/oder die Druckgefäßwandung mindestens in ihrer konischen Aufnahme mit einer duktilen metallischen Beschichtung zu versehen. Hierzu kann beispielsweise eine galvanisch aufgebrachte Kupferschicht von 5 - 20µm, die durch Glühen bei 950 - 1000°C homogenisiert wurde, eingesetzt werden.Advantageous for the hermetic connection of the ceramic insulating body with its internal and external metal partners, i.e. the Implementation pins or the conical receptacle, it is, especially at ceramic insulating bodies with uncut cone surfaces, the Implement pins at least on their middle part and / or the Pressure vessel wall at least in its conical receptacle with a ductile metallic coating. This can be done, for example a galvanically applied copper layer of 5 - 20µm, which by annealing was homogenized at 950 - 1000 ° C, are used.

Die Erfindung wird im Folgenden anhand von Ausführungsbeispielen näher erläutert. The invention is explained in more detail below on the basis of exemplary embodiments explained.

In den zugehörigen Zeichnungen zeigen:

Figur 1
einen Schnitt durch eine Anordnung, bei der ein konischer Isolierkörper in einer konischen Aufnahme sitzt,
Figur 2
einen Schnitt durch den konischen Isolierkörper, der konische und abgesetzte Durchgangslöcher aufweist,
und
Figur 3
einen Schnitt einer Durchführung mit duktilen metallischen Beschichtungen.
In the accompanying drawings:
Figure 1
3 shows a section through an arrangement in which a conical insulating body is seated in a conical receptacle,
Figure 2
a section through the conical insulating body which has conical and stepped through holes,
and
Figure 3
a section of an implementation with ductile metallic coatings.

In Figur 1 ist ein Schnitt durch eine Durchführungsanordnung dargestellt. Bei dieser Anordnung befindet sich in einer Druckgefäßwandung 3 eine konischen Aufnahme 4 aus Edelstahl. Die Aufnahme 4 hat im dargestellten Beispiel einen Außendurchmesser von 16 mm. In dieser befindet sich ein konischer Isolierkörper 1 aus hochfester Al2O3-Keramik mit einer Höhe von 5 mm, einem mittleren Durchmesser von 8 mm und einem halben Konuswinkel von 3°, in dem ein Durchführungsleiter 2 hart eingelötet ist. Die Aufnahme 4 ist nach Vorwärmung auf 300°C auf den Isolierkörper 1 aufgeschrumpft. Es konnte experimentell nachgewiesen werden, dass die so hergestellte Durchführung eine Druckbeständigkeit von mehr als 4000 bar bei einer Temperatur von 400 °C auf weist. FIG. 1 shows a section through a bushing arrangement. In this arrangement, a conical receptacle 4 made of stainless steel is located in a pressure vessel wall 3. In the example shown, the receptacle 4 has an outer diameter of 16 mm. In this there is a conical insulating body 1 made of high-strength Al 2 O 3 ceramic with a height of 5 mm, an average diameter of 8 mm and a half cone angle of 3 °, in which a lead-through conductor 2 is hard soldered. After preheating to 300 ° C., the receptacle 4 is shrunk onto the insulating body 1. It could be demonstrated experimentally that the procedure thus produced has a pressure resistance of more than 4000 bar at a temperature of 400 ° C.

Figur 2 erläutert verschiedene Befestigungsmöglichkeiten für die Anordnung des Durchführungsleiters 2 im konischen Isolierkörper 1.
In der links dargestellten Anordnung ist im konischen Isolierkörper 1 ein konisches Durchgangsloch 5 mit einem halben Konuswinkel von 5° angebracht. In diesem befindet sich ein durch Aufschrumpfen befestigter Durchführungsstift 6 mit konischem Mittelteil 7, das einen mittleren Durchmesser von 1,2 mm und einem halben Konuswinkel von 4,5° aufweist. FIG. 2 explains various fastening options for the arrangement of the feed-through conductor 2 in the conical insulating body 1.
In the arrangement shown on the left, a conical through hole 5 with a half cone angle of 5 ° is made in the conical insulating body 1. In this there is a bushing pin 6 fastened by shrinking on, with a conical central part 7, which has an average diameter of 1.2 mm and a half cone angle of 4.5 °.

Bei der rechts dargestellten Anordnung ist der konische Isolierkörper 1 mit einem abgesetzten Durchgangsloch 9 versehen, in dem ein Durchführungsstift 10 mit verstärktem Mittelteil 11 eingebracht ist. Das Durchgangsloch 9 ist mit einem Durchmesser von 0,5 mm ausgeführt und mit einem Absatz von Durchmesser 1,0 mm und einer Höhe von 1,5 mm versehen. Die Durchführungsdrähte 10 weisen einen Durchmesser von 0,45 mm auf und sind mit einem verstärktem Mittelteil 11 mit einem Durchmesser von 0,8 mm und einer Höhe von 0,3 mm versehen. Sie sind mit einem Kupfersilberlot, das einen 10%-igen Titananteil besitzt, im Isolierkörper 1 hart eingelötet.In the arrangement shown on the right, the conical insulating body 1 is included a stepped through hole 9, in which a grommet 10 is introduced with a reinforced central part 11. The through hole 9 is with with a diameter of 0.5 mm and a heel of Diameter 1.0 mm and a height of 1.5 mm. The Feed-through wires 10 have a diameter of 0.45 mm and are with a reinforced middle part 11 with a diameter of 0.8 mm and with a height of 0.3 mm. You are using a copper silver solder that has a 10% titanium content, hard soldered into the insulating body 1.

Die in Figur 3 gezeigte Schnittdarstellung zeigt einen Ausschnitt aus einer Druckgefäßwandung 3 mit konischer Aufnahme 4. In der Aufnahme 4 befindet sich der im Halbschnitt dargestellte konische Isolierkörper 1, der wiederum mit einem konischem Durchgangsloch versehen ist, in dem sich der mit einem konischem Mittelteil 7 versehene Durchgangsstift 6 befestigt ist. Bei dieser Ausführung sind sowohl die Außenfläche des konischen Mittelteiles 7 des Durchführungsstiftes 6 als auch die Innenfläche der konischen Aufnahme 4 der Druckgefäßwandung 3 mit duktilen metallischen Beschichtungen 8 versehen. Als duktile metallische Beschichtung 8 ist hier eine galvanisch aufgebrachte und homogenisierte Kupferschicht von ca. 10µm Stärke aufgebracht. Der konische Isolierkörper 1 ist über die duktilen metallischen Beschichtungen 8 mit der Gefäßwandung 3 bzw. den Durchführungsstiften 6 durch Aufschrumpfen verbunden. Die Anordnung bildet so eine hermetische, druckund temperaturbeständige Durchführung. The sectional view shown in FIG. 3 shows a section of a pressure vessel wall 3 with a conical receptacle 4. The receptacle 4 contains the conical insulating body 1 shown in half section, which in turn is provided with a conical through-hole in which there is a conical middle part 7 provided through pin 6 is attached. In this embodiment, both the outer surface of the conical middle part 7 of the lead-through pin 6 and the inner surface of the conical receptacle 4 of the pressure vessel wall 3 are provided with ductile metallic coatings 8. A galvanically applied and homogenized copper layer of approx. 10 μm thickness is applied here as the ductile metallic coating 8. The conical insulating body 1 is connected via the ductile metallic coatings 8 to the vessel wall 3 or the bushing pins 6 by shrinking on. The arrangement thus forms a hermetic, pressure and temperature-resistant bushing.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11
konischer Isolierkörperconical insulating body
22
DurchführungsleiterThrough conductors
33
Druckgefäßwandungpressure tank
44
konische Aufnahmeconical mount
55
konisches Durchgangslochconical through hole
66
DurchführungsstiftFeedthrough pin
77
konisches Mittelteilconical middle section
88th
duktile metallische Beschichtungductile metallic coating
99
abgesetztes Durchgangslochstepped through hole
1010
DurchführungsdrahtFeedthrough wire
1111
verstärktes Mittelteilreinforced middle section
αα
Konuswinkelcone angle

Claims (8)

Elektrische Durchführung an isolierenden Bestandteilen einer Druckgefäßwandung (3), insbesondere für Gehäuse von Drucksensoren, dadurch gekennzeichnet, dass die Druckgefäßwandung (3) eine konische Aufnahme (4) aufweist, in die ein außen konischer Isolierkörper (1), in dem ein oder mehrere elektrisch leitende Durchführungsleiter (2) fest angeordnet sind, eingesetzt ist; wobei die Konuswinkel der Aufnahme (4) und des Isolierkörpers (1) sich nach der zur Hochdruckseite hin öffnen.Electrical implementation on insulating components of a pressure vessel wall (3), in particular for housings of pressure sensors, characterized in that the pressure vessel wall (3) has a conical receptacle (4) into which an externally conical insulating body (1), in which one or more electrically conductive feed-through conductors (2) are fixedly inserted; the cone angles of the receptacle (4) and the insulating body (1) open towards the high pressure side. Durchführung nach Anspruch 1, dadurch gekennzeichnet, dass der konische Isolierkörper (1) aus hochfester Al2O3-Keramik besteht, einen halben Konuswinkel von 2 - 4° aufweist und die Durchführungen (2) mit Hartlot im Isolierkörper (1) befestigt sind.Bushing according to claim 1, characterized in that the conical insulating body (1) consists of high-strength Al 2 O 3 ceramic, has a half cone angle of 2-4 ° and the bushings (2) are fixed in the insulating body (1) with hard solder. Durchführung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die hochfeste Al2O3-Keramik des Isolierkörpers (1) eine Glasphase von ca. 0,5% besitzt und das Hartlot zur Befestigung der Durchführungen (2) einen Bestandteil von 8-12 Gewichts- % an Titan enthält.Bushing according to claim 1 or 2, characterized in that the high-strength Al 2 O 3 ceramic of the insulating body (1) has a glass phase of approximately 0.5% and the braze solder for fastening the bushings (2) has a component of 8-12 Contains% by weight of titanium. Durchführung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in dem Isolierkörper (1) aus hochfester Al2O3-Keramik konische Durchgangslöcher (5) mit einem halben Konuswinkel von 4 - 8°, der sich nach der Hochdruckseite hin öffnet, und in den Durchgangslöchern (5) Durchführungsstifte (6), die ein konisches Mittelteil (7) aufweisen, dessen Konuswinkel gleich dem oder um 0,5 - 1° kleiner als der Konuswinkel der Durchgangslöcher (5) ist, haftfest angeordnet sind.Implementation according to one of the preceding claims, characterized in that in the insulating body (1) made of high-strength Al 2 O 3 ceramic, conical through holes (5) with a half cone angle of 4-8 °, which opens towards the high pressure side, and in the through holes (5) have through pins (6) which have a conical central part (7), the cone angle of which is equal to or smaller by 0.5 - 1 ° than the cone angle of the through holes (5). Durchführung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Durchführungsstifte (6) mindestens auf Ihrem Mittelteil und/oder die Druckgefäßwandung (3) mindestens in ihrer konischen Aufnahme (4) eine duktile metallische Beschichtung (8) aufweisen.Bushing according to one of the preceding claims, characterized in that the bushing pins (6) have a ductile metallic coating (8) at least on their central part and / or the pressure vessel wall (3) at least in their conical receptacle (4). Durchführung nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass in dem Isolierkörper (1) aus hochfester Al2O3-Keramik abgesetzte Durchgangslöcher (9) mit einem größeren Durchmesser auf der Hochdruckseite, und in diesen Durchgangslöchern (9) Durchgangsdrähte (10) mit einem verstärktem Mittelteil (11) haftfest angeordnet sind.Bushing according to one of claims 2 to 5, characterized in that through holes (9) with a larger diameter on the high-pressure side, made of high-strength Al 2 O 3 ceramic, are set out in the insulating body (1), and through wires (10) in these through holes (9) ) are arranged with a reinforced central part (11) adherent. Verfahren zur Herstellung einer Durchführung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Druckgefäßwandung (3) zunächst um 200 bis 300 K gegenüber Umgebungstemperatur aufgeheizt und danach der Isolierkörper (1) in die Druckgefäßwandung (3) unter leichten Druck eingesetzt und nach Durchwärmung des Isolierkörpers (1) die Durchführungsstifte (6) in diesen eingepresst werden.Method for producing a bushing according to one of claims 1 to 6, characterized in that the pressure vessel wall (3) is first heated by 200 to 300 K relative to the ambient temperature and then the insulating body (1) is inserted into the pressure vessel wall (3) under slight pressure and after Warming the insulating body (1), the bushing pins (6) are pressed into this. Verfahren zur Herstellung einer Durchführung nach Anspruch 7, dadurch gekennzeichnet, dass für die Durchführungsstifte (6) und/oder die Druckgefäßwandung (3), eine metallischen Beschichtung (8) galvanisch aufgetragen wird, und danach die beschichteten Durchführungsstifte (6) und/oder die Druckgefäßwandung (3) durch Glühen unter Wasserstoff bei einer Temperatur, die um 50 - 100 K unter dem Schmelzpunkt der Beschichtung liegt, homogenisiert werden.A method for producing a bushing according to claim 7, characterized in that for the bushing pins (6) and / or the pressure vessel wall (3), a metallic coating (8) is applied galvanically, and then the coated bushing pins (6) and / or the Pressure vessel wall (3) are homogenized by annealing under hydrogen at a temperature which is 50-100 K below the melting point of the coating.
EP03011877A 2002-06-06 2003-05-27 High-pressure lead-throughs for insulating components of pressure vessel walls Expired - Lifetime EP1369879B1 (en)

Applications Claiming Priority (2)

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DE10225318 2002-06-06
DE10225318 2002-06-06

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EP1369879A3 EP1369879A3 (en) 2004-01-21
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AT (1) ATE371935T1 (en)
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE102014202687A1 (en) * 2014-02-14 2015-08-20 Robert Bosch Gmbh Fuel injection system

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
DE102010048903B4 (en) * 2010-10-08 2014-10-30 Hydac Electronic Gmbh Electrical feedthrough for high pressure applications as a carrier for sensors
EP2579013A1 (en) 2011-10-07 2013-04-10 Technische Universität Darmstadt Invention relating to pressurised feed throughs

Citations (3)

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US3173992A (en) * 1962-11-16 1965-03-16 Technical Drilling Service Inc Resilient, high temperature resistant multiple conductor seal for conical ports
US4519662A (en) * 1982-04-08 1985-05-28 Westinghouse Electric Corp. High pressure electrical penetrator
DE3720061A1 (en) * 1987-06-16 1988-12-29 Philips Patentverwaltung Electrical bushing for high-pressure containers with internal pressures of more than 1000 bar

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173992A (en) * 1962-11-16 1965-03-16 Technical Drilling Service Inc Resilient, high temperature resistant multiple conductor seal for conical ports
US4519662A (en) * 1982-04-08 1985-05-28 Westinghouse Electric Corp. High pressure electrical penetrator
DE3720061A1 (en) * 1987-06-16 1988-12-29 Philips Patentverwaltung Electrical bushing for high-pressure containers with internal pressures of more than 1000 bar

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014202687A1 (en) * 2014-02-14 2015-08-20 Robert Bosch Gmbh Fuel injection system

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ATE371935T1 (en) 2007-09-15
EP1369879B1 (en) 2007-08-29
DE50308046D1 (en) 2007-10-11
EP1369879A3 (en) 2004-01-21
DE10323945A1 (en) 2004-04-08

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