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WO1998045696A1 - Element d'etancheite pour detecteurs - Google Patents

Element d'etancheite pour detecteurs Download PDF

Info

Publication number
WO1998045696A1
WO1998045696A1 PCT/DE1998/000902 DE9800902W WO9845696A1 WO 1998045696 A1 WO1998045696 A1 WO 1998045696A1 DE 9800902 W DE9800902 W DE 9800902W WO 9845696 A1 WO9845696 A1 WO 9845696A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing element
housing
seal according
molded part
sealing
Prior art date
Application number
PCT/DE1998/000902
Other languages
German (de)
English (en)
Inventor
Helmut Weyl
Hans-Martin Wiedenmann
Anton Hans
Johann Wehrmann
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to GB9826887A priority Critical patent/GB2330207A/en
Priority to CN98800424A priority patent/CN1222975A/zh
Priority to JP10542228A priority patent/JP2000511645A/ja
Publication of WO1998045696A1 publication Critical patent/WO1998045696A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/406—Cells and probes with solid electrolytes
    • G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases

Definitions

  • the invention relates to a seal for a sensor element of a gas sensor according to the preamble of the main claim.
  • a seal for example from DE 195 32 090, in which the sensor element is mounted in a longitudinal bore of a housing by means of at least two sealing bodies and a deformable additional seal arranged between the sealing bodies.
  • the two sealing bodies consist of magnesium aluminum silicate or steatite and the one installed between these sealing bodies
  • Sealing body made of the hexagonal allotrope of boron nitride.
  • main claim has the advantage that it is both gas-tight and impermeable to liquids, in particular for fuels, and also has a very high temperature resistance. This is accomplished by a mixture of the hexagonal allotrope of boron nitride (BN) and at least one oxide ceramic component.
  • BN hexagonal allotrope of boron nitride
  • oxide ceramic component and BN instead of a sealing structure made of sealing elements of different chemical compositions has simplified handling and assembly.
  • steatite the combustion product of soapstone with the approximate chemical formula 3 M "0 • 4 SiO 2 ⁇ H 2 0 that is used in a mixture with the hexagonal allotropes of BN.
  • This ensures a particularly high temperature stability.
  • boron nitride the hexagonal allotrope of which is a very fine-grained and, similar to its isosteric graphite, a well deformable connection, the tightness is significantly improved.
  • the BN content in the sealing element is 5 to 10 percent by weight.
  • Good handling during assembly of the seal is achieved if the steatite / BN sealing body is used in the presintered state and is deformed by the action of a force during assembly in such a way that the material of the sealing body or seals contacts the sensor element and the housing and thus the sensor element is kept gas-tight in the housing.
  • Figure 1 shows a cross section through a
  • the single figure shows a gas sensor 10, for example an electrochemical oxygen sensor, which has a metallic housing 12 which has a thread 13 as a fastening means for installation in a measuring gas tube, not shown.
  • the housing 12 has a longitudinal bore 15 with a shoulder-shaped ring surface 16.
  • On the shoulder-shaped ring surface 16 there is, for example, a metallic sealing ring 18 on which a measuring gas-side ceramic molded part 21 rests.
  • the measuring gas-side ceramic molding 21 has a continuous measuring gas-side opening 22 running in the direction of the longitudinal bore 15.
  • a connection-side ceramic molding 23 is also arranged in the longitudinal bore 15.
  • connection-side molded ceramic part 23 also has a centrally arranged and continuous connection-side opening 24 running in the direction of the longitudinal bore 15.
  • connection-side opening 24 running in the direction of the longitudinal bore 15.
  • plate-shaped sensor element 27 with an end section 28 on the measuring gas side and an end section 29 on the connection side.
  • the measuring gas-side end section 28 of the sensor element 27 protrudes from the housing 11 and is surrounded by a protective tube 31 which is fixed to the housing 11.
  • the protective tube 31 has inlet and outlet openings 32 for the gas to be measured.
  • the connection-side end section 29 has connection contacts 34 which also protrude from the housing 11.
  • the connection contacts 34 are contacted with a contact plug, not shown, provided with connection cables.
  • the connection-side end section 29 protruding from the housing 11 is surrounded by an encapsulation, not shown, which protects the end section 29 from environmental influences.
  • a seal 37 consisting of a BN / steatite mixture. Boron nitride is present as a hexagonal allotrope and has, for example, a share of 10% by weight in the sealing element 37.
  • the ceramic molded part 23 on the connection side presses on this sealing element 37.
  • the contact pressure of the ceramic molded part 23 on the connection side is applied by a metal sleeve 40.
  • the metal sleeve 40 has, for example, evenly distributed a plurality of claws 41 which point inwards and which engage in notches 42 formed in the housing 12. However, it is also conceivable to weld the metal sleeve 40 to the housing 12. That from the
  • Bn / steatite mixture existing sealing element 37 is sintered before installation in the longitudinal bore 15 of the housing 12 preformed into a ring at a low temperature of, for example, 500 ° C.
  • the annular sealing element 37 formed in this way is inserted, according to the exemplary embodiment, into the longitudinal bore 15 which already contains the sensor element 27.
  • the connection-side molded ceramic part 23 is then arranged over the seal 37.
  • the metal sleeve 40 is placed on the connection-side ceramic molded part. A force is then exerted on the metal sleeve 40, for example by means of a stamp, which is applied to the ceramic molded part 23 on the connection side
  • Sealing element 37 acts.
  • the prefabricated ring of the sealing element 37 is deformed such that the material of the sealing element 37 presses against the sensor element 27 and the housing 12.
  • sealing element 37 is not limited to the sealing of planar sensor elements in metallic housings. It is entirely conceivable to use such a sealing element 37 also for sealing so-called finger probes. In this application, the execution of the prefabricated ring for the sealing element 37 then only has to be adapted to the geometry of the longitudinal bore and the contact surface between the housing and the finger-shaped sensor element.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Oxygen Concentration In Cells (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

L'invention concerne un joint pour un élément détecteur (27) d'un détecteur de gaz (10), servant notamment à déterminer la teneur en oxygène de gaz d'échappement produits par des moteurs à combustion interne. Ce joint comprend au moins un élément d'étanchéité (37) introduit dans un trou longitudinal (15) d'un boîtier (12), ledit élément d'étanchéité étant constitué d'un mélange de l'allotrope hexagonale du nitrure de bore (BN) et d'un composant oxyde céramique, de préférence de la stéatite.
PCT/DE1998/000902 1997-04-07 1998-03-28 Element d'etancheite pour detecteurs WO1998045696A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9826887A GB2330207A (en) 1997-04-07 1998-03-28 Sealing element for sensors
CN98800424A CN1222975A (zh) 1997-04-07 1998-03-28 传感器用的密件元件
JP10542228A JP2000511645A (ja) 1997-04-07 1998-03-28 センサのためのシール部材

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19714203A DE19714203C2 (de) 1997-04-07 1997-04-07 Dichtelement für Sensoren
DE19714203.6 1997-04-07

Publications (1)

Publication Number Publication Date
WO1998045696A1 true WO1998045696A1 (fr) 1998-10-15

Family

ID=7825617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/000902 WO1998045696A1 (fr) 1997-04-07 1998-03-28 Element d'etancheite pour detecteurs

Country Status (6)

Country Link
JP (1) JP2000511645A (fr)
KR (1) KR20000016317A (fr)
CN (1) CN1222975A (fr)
DE (1) DE19714203C2 (fr)
GB (1) GB2330207A (fr)
WO (1) WO1998045696A1 (fr)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19848959A1 (de) * 1998-10-23 2000-04-27 Bosch Gmbh Robert Verfahren zur Herstellung von Bornitrid-Dichtscheiben aus einem Bornitrid-Block
DE19911516C1 (de) * 1999-03-16 2000-09-28 Heraeus Electro Nite Int Sensoranordnung für gasförmige Medien
GB2350684B (en) * 1999-05-24 2003-11-26 Ford Motor Co Exhaust gas sensor
DE10009597B4 (de) * 2000-02-29 2006-12-07 Robert Bosch Gmbh Elektrochemischer Messfühler und Verfahren zu dessen Herstellung
DE10015849A1 (de) * 2000-03-30 2001-10-18 Kempten Elektroschmelz Gmbh Alterungsbeständiges bornitridhaltiges keramisches Material
DE10055442A1 (de) * 2000-11-09 2002-05-29 Wacker Chemie Gmbh Verfahren zum Recycling eines Bornitrid-Keramik-Bauteils für metallurgische Anwendungen
DE10058013A1 (de) * 2000-11-23 2002-06-06 Bosch Gmbh Robert Gasmeßfühler
DE10060027A1 (de) * 2000-12-01 2002-06-13 Epiq Sensor Nite N V Dichtungsanordnung für einen Temperatur- oder Gassensor
DE10222789B4 (de) * 2002-05-23 2006-12-07 Robert Bosch Gmbh Gasmeßfühler
JP3978384B2 (ja) * 2002-10-04 2007-09-19 日本特殊陶業株式会社 ガスセンサ
JP2005326394A (ja) * 2004-04-13 2005-11-24 Denso Corp ガスセンサ
DE102004056417A1 (de) * 2004-11-23 2006-05-24 Robert Bosch Gmbh Gasmessfühler
DE102005012449A1 (de) * 2005-03-18 2006-09-21 Robert Bosch Gmbh Sensor und Verfahren zu dessen Herstellung
JP4826458B2 (ja) * 2006-12-11 2011-11-30 株式会社デンソー ガスセンサ取付構造
JP4865522B2 (ja) * 2006-12-12 2012-02-01 日本特殊陶業株式会社 ガスセンサの製造方法
CN102346178A (zh) * 2010-07-26 2012-02-08 比亚迪股份有限公司 一种气体传感器密封件及一种汽车氧传感器
CN102707018A (zh) * 2012-06-17 2012-10-03 无锡隆盛科技股份有限公司 气体传感器
CN103115150B (zh) * 2013-01-25 2015-02-04 镇江泛沃汽车零部件有限公司 一种片式氧传感器中密封件制作方法及其密封件
CN103134908A (zh) * 2013-01-31 2013-06-05 广东卓耐普智能技术股份有限公司 气体传感器
DE102014203165A1 (de) 2014-02-21 2015-08-27 Robert Bosch Gmbh Sensor zur Erfassung mindestens einer Eigenschaft eines Messgases in einem Messgasraum
DE102014214503A1 (de) 2014-07-24 2016-01-28 Robert Bosch Gmbh Sensorvorrichtung zur Erfassung mindestens einer Eigenschaft eines fluiden Mediums und Verfahren zu ihrer Bereitstellung
DE102014222365A1 (de) * 2014-11-03 2016-05-04 Robert Bosch Gmbh Verfahren zum Herstellen einer Dichtung für ein Sensorelement eines Sensors zur Erfassung mindestens einer Eigenschaft eines Messgases in einem Messgasraum
DE102015226358A1 (de) 2015-12-21 2017-06-22 Robert Bosch Gmbh Sensor zur Erfassung mindestens einer Eigenschaft eines Messgases in einem Messgasraum
DE102015226750A1 (de) 2015-12-28 2017-06-29 Robert Bosch Gmbh Sensor zur Erfassung mindestens einer Eigenschaft eines Messgases in einem Messgasraum
DE102016207502A1 (de) * 2016-05-02 2017-11-02 Robert Bosch Gmbh Verfahren zum Herstellen einer Dichtung für ein Sensorelement eines Sensors zur Erfassung mindestens einer Eigenschaft eines Messgases in einem Messgasraum
DE102016215921A1 (de) 2016-08-24 2018-03-01 Robert Bosch Gmbh Sensor zur Erfassung mindestens einer Eigenschaft eines Messgases in einem Messgasraum
DE102017118762A1 (de) 2017-08-17 2019-02-21 Claas Industrietechnik Gmbh Landwirtschaftliches Arbeitsfahrzeug
DE102017220409A1 (de) 2017-11-15 2019-05-16 Robert Bosch Gmbh Dichtungselement für ein Sensorelement eines Sensors zur Erfassung mindestens einer Eigenschaft eines Messgases in einem Messgasraum und Verfahren zu seiner Herstellung
CN108519419A (zh) * 2018-03-27 2018-09-11 常州联德电子有限公司 车用氧传感器的压缩式密封方法
DE102020215517A1 (de) 2020-12-09 2022-06-09 Robert Bosch Gesellschaft mit beschränkter Haftung Sensor zur Erfassung mindestens einer Eigenschaft eines Messgases in einem Messgasraum
CN113252845B (zh) * 2021-04-22 2023-10-10 联合汽车电子有限公司 用于传感元件密封的密封件及其制造方法、气体传感器

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195417A1 (fr) * 1985-03-20 1986-09-24 Elektroschmelzwerk Kempten GmbH Matériaux mixtes polycristallins frittés à base de nitrure de bore
US5228975A (en) * 1989-11-25 1993-07-20 Ngk Spark Plug Co., Ltd. Gas sensor having hermetic and electrically insulating seal in housing
EP0694500A1 (fr) * 1994-06-30 1996-01-31 Nkk Corporation Matériau contenant du nitrure de bore et méthode pour le préparer
US5571397A (en) * 1995-07-05 1996-11-05 Ford Motor Company Boron nitride exhaust seal
DE19532090A1 (de) * 1995-08-30 1997-03-06 Bosch Gmbh Robert Dichtung für ein Sensorelement eines Gassensors
DE19603379A1 (de) * 1996-01-31 1997-08-07 Bosch Gmbh Robert Gassensor
DE19605290A1 (de) * 1996-02-14 1997-08-21 Bosch Gmbh Robert Meßfühler
DE19615866A1 (de) * 1996-04-20 1997-10-23 Bosch Gmbh Robert Elektrochemischer Meßfühler für Pulverdichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1186486A (en) * 1968-10-22 1970-04-02 Rolls Royce Fibre Reinforced Blade
US3593366A (en) * 1968-12-11 1971-07-20 Wolverine Pentronix Multiple punch tool set for powder compacting press
DE1960529A1 (de) * 1969-12-03 1971-06-09 Engel Karl Heinz Feuerloeschanlage

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195417A1 (fr) * 1985-03-20 1986-09-24 Elektroschmelzwerk Kempten GmbH Matériaux mixtes polycristallins frittés à base de nitrure de bore
US5228975A (en) * 1989-11-25 1993-07-20 Ngk Spark Plug Co., Ltd. Gas sensor having hermetic and electrically insulating seal in housing
EP0694500A1 (fr) * 1994-06-30 1996-01-31 Nkk Corporation Matériau contenant du nitrure de bore et méthode pour le préparer
US5571397A (en) * 1995-07-05 1996-11-05 Ford Motor Company Boron nitride exhaust seal
DE19532090A1 (de) * 1995-08-30 1997-03-06 Bosch Gmbh Robert Dichtung für ein Sensorelement eines Gassensors
DE19603379A1 (de) * 1996-01-31 1997-08-07 Bosch Gmbh Robert Gassensor
DE19605290A1 (de) * 1996-02-14 1997-08-21 Bosch Gmbh Robert Meßfühler
DE19615866A1 (de) * 1996-04-20 1997-10-23 Bosch Gmbh Robert Elektrochemischer Meßfühler für Pulverdichtung

Also Published As

Publication number Publication date
GB2330207A (en) 1999-04-14
CN1222975A (zh) 1999-07-14
JP2000511645A (ja) 2000-09-05
DE19714203C2 (de) 2000-06-29
KR20000016317A (ko) 2000-03-25
GB9826887D0 (en) 1999-01-27
DE19714203A1 (de) 1998-10-15

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