EP2895831A2 - Découplage thermique de la fixation d'un capteur haute température dans un logement - Google Patents

Découplage thermique de la fixation d'un capteur haute température dans un logement

Info

Publication number
EP2895831A2
EP2895831A2 EP13763239.4A EP13763239A EP2895831A2 EP 2895831 A2 EP2895831 A2 EP 2895831A2 EP 13763239 A EP13763239 A EP 13763239A EP 2895831 A2 EP2895831 A2 EP 2895831A2
Authority
EP
European Patent Office
Prior art keywords
temperature sensor
fastening
sensor according
fastener
decoupling
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.)
Withdrawn
Application number
EP13763239.4A
Other languages
German (de)
English (en)
Inventor
Heiko Lantzsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tesona GmbH and Co KG
Original Assignee
Tesona GmbH and Co KG
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 Tesona GmbH and Co KG filed Critical Tesona GmbH and Co KG
Publication of EP2895831A2 publication Critical patent/EP2895831A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08—Protective devices, e.g. casings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
    • G01K13/024—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow of moving gases
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2205/00—Application of thermometers in motors, e.g. of a vehicle
    • G01K2205/04—Application of thermometers in motors, e.g. of a vehicle for measuring exhaust gas temperature

Definitions

  • the present invention relates to a high-temperature sensor having a sensor element with a hot-side oriented measuring section and a fastening device arranged around the sensor element according to claim 1.
  • a temperature sensor with a thermal element which has a heat-resistant sheath line, at the end of the measuring medium end facing a sensor element is arranged.
  • the temperature sensor shown should be operational up to temperatures of 1200 ° C and can detect rapid temperature decreases.
  • the sensor element consists of a thermowire bead, which protrudes from the sheathed cable and is received by a protective sheath, which is fastened on the end of the sheathed cable facing the measuring medium.
  • the protective cover has a one-piece front part without welds and the sheathed cable is a flexible, thin-walled metal tube with a small outer diameter, at the side facing away from the measuring medium lead wires are led out, which produce the desired connection to the on-board electronics.
  • the temperature sensor is attached to the measuring point with a special collar and a union nut. From EP 2 196 787 A2 a high temperature sensor with a sensor element is already known, which is mounted in a protective tube.
  • the protective tube is surrounded by a stiffening tube, wherein the stiffening tube is made of a material whose thermal expansion coefficient is higher than that of the material from which the protective tube.
  • the stiffening tube is firmly connected to a first region of the protective tube with the protective tube and in a second region of the protective tube is a stop element, which is also firmly connected to the protective tube.
  • the stiffening tube occurs due to its higher Wirmedehnung from a predetermined temperature in mechanical contact with the stop element, whereby the high temperature sensor from this temperature is mechanically stabilized.
  • the space between the sensor element and the protective tube cap is filled according to EP 2 196 787 A2 with a good heat-conducting material. Fine silicon powder can be used for this purpose.
  • the stabilizing, mechanical contacting of the protective tube with the stop element requires a minimum temperature, so that especially in the start phase or in non-high-performance operation, the overall arrangement tends to vibrations that jeopardize the reliability of the measuring arrangement, With a iefest Trentssockef 4, the high-temperature sensor in the exhaust system be attached.
  • a high-temperature sensor can, for example, take place at the elbow or at the weld neck of the exhaust system of a motor vehicle,
  • the fastening device has: a fastening element for fastening the high-temperature sensor in a receptacle, in particular a screw or a nut, and a mounting collar, which faces relative to m fastener of the hot Shen side and is thermally decoupled to the fastener.
  • the mounting collar can be configured as a flange or pressure collar.
  • the mounting collar can also be designed as a thermal shutter. This results in a shielding of the fastener against thermal stress.
  • hlu ngsschi rmende elements can be provided between the fastening device and sensor element which stabilizes the sensor element and protects it from mechanical loads.
  • the mounting collar is applied to the protective cover or the sensor element.
  • the fastening element can be designed such that it does not bear against the sensor element or its protective cover and is only stabilized by the mounting collar.
  • the fastener by another element, for.
  • a stabilizing sleeve supported against the sensor element and / or be stabilized.
  • the mounting collar may be immovably connected to the sensor element, z, B, by a Versch chiefsung with attached between the sensor element and mounting device protective cover,
  • the thermal resistance between the fastening element and mounting collar is more than 100 K / W, in particular more than 1000 K / W.
  • the fastening ungselement and the mounting collar abut each other, wherein the contact surface is reduced to a minimum, in particular less than 10%, preferably less than 2% of the maximum Quersch nitts Structs Structs Structs Structs Structs Structs Structs Structs Structs Structs Structs Structs Structs Structs Structs Sta minimum, in particular less than 10%, preferably less than 2% of the maximum Quersch nitts Sta fastener.
  • the maximum cross-sectional area may be defined as the maximum area of the fastener in a plane that is orthogonal to the The axis of the sensor element is about which the fastener is arranged.
  • the mounting collar is attached to the sensor element.
  • a decoupling element of a material with low thermal conductivity in particular with a thermal conductivity of less than 20 W / m K at 1000 ° C, preferably less than 5 W / mK at 1000 ° C, is arranged.
  • the decoupling element is made of ceramic.
  • the decoupling element is disk-shaped, in particular that the decoupling element is a washer.
  • the decoupling element is a pressure screw or a union nut.
  • the decoupling element can be fastened between the fastening collar and the fastening element, for example by welding, or it can be e.g. B. in the case of a washer removably disposed between the mounting collar and fastener.
  • the high-temperature sensor has a protective cover which at least partially surrounds the sensor element.
  • a stabilizing and fastening sleeve is arranged around the control element and / or around the protective cover and attached to the fastening element, in particular welded, is.
  • the stabilization and fastening sleeve benefits from the thermal decoupling of the control element.
  • the stabilization and fastening sleeve is thus exposed to lower temperature loads and can be made of materials that have a lower temperature resistance.
  • the stabilization and fastening sleeve is attached to the mounting collar and / or on the contact surface between the mounting collar and fastener, z. B. by welding. Although the stabilization and fastening sleeve does not profit to the same extent from the thermal mix decoupling, but it can be achieved increased mechanical stability.
  • a high temperature sensor is provided with a fastening element for attachment to a receptacle, wherein the fastening element has a recess for an exact, predetermined position alignment.
  • the correct position of the high-temperature sensor can be ensured, for example, in the case that the sensor element and / or the protective cover are not rotationally symmetrical about the sensor element, but have a preferred orientation.
  • the recess may be a molding of an otherwise circular design of the fastening element.
  • Fig. La a first longitudinal view of an inventive
  • FIG. 1b is a second longitudinal view of the high temperature sensor of FIG. 1;
  • Fig. 2a is a front view of the high-temperature sensor according to
  • Fig. 1 from the cold side of the sensor;
  • Fig. 3a is a side view of another erfindurtgsaffen
  • FIG. 3b is a longitudinal view of the high temperature sensor of FIG.
  • 3c is a plan view of the high temperature sensor of FIG.
  • FIG. 3d is a cross-sectional view of the high temperature sensor of FIGS. 3a and 3b
  • Fig. 3e is a perspective view of the high temperature sensor of Fig. 3a.
  • FIG. 1 a shows a high-temperature sensor 10 with a fastening device according to the invention comprising a fastening collar 20 and a fastening element 22.
  • the fastening element 22 is configured as a screw 22 with an external thread 23.
  • the screw 22 has a cavity 25 so that the sensor element 12 with the protective cover 14 arranged around it can be guided by the screw 22.
  • the sensor element 12 has a measuring section 13 on the hot side. On the cold side there are electrical connections 12a, 12b.
  • the sensor element 12 essentially consists of two parallel bars and the measuring section 13 arranged at the hot end of these bars.
  • mounting collar 20 and fastening element 22 are around sensor element 12 and Protective cover 14 is arranged.
  • the mounting collar 20 is welded to the protective cover 14.
  • the decoupling element 26 is z. B. configured as a ceramic ring and acts as a heat barrier, thus enabling effective thermal decoupling between fastening ungsbund 20 and
  • FIG. 1 b shows a second longitudinal view of the high-temperature sensor from FIG. 1.
  • the sectional plane is orthogonal to that in FIG. la shown
  • Fig. 2a shows a top view of the hot side of the high-temperature sensor 10 of FIG. 1.
  • the measuring section 13 can be seen, surrounded by the protective cover 14. Farther outward, the fastening collar 20 and the screw 22 with the hexagonal head are visible.
  • FIG. 2 b shows a top view of the cold side of the high-temperature sensor 10 from FIG. 1
  • FIGS. 3a to 3e show a further high-temperature sensor 30 according to a further aspect of the present invention.
  • the high temperature sensor 30 in this case comprises an elliptical, d. H .
  • rotationally symmetrical jacket thermocouple comprising an elliptical protective cover 14 and a likewise ellipsoidal sensor element 12.
  • the high temperature sensor 30 is attached via the fastener 32 to a receptacle.
  • the attachment should be made so that » the longer axis of the ellipse shape of the protective cover 14 or of the sensor element 12 is aligned along the flow direction of the medium to be measured.
  • Such positioning is made possible by the recess 32a, which attaches to a corresponding counterpart in a receptacle for the high-temperature sensor 30.
  • FIG. 3b shows a longitudinal section through the longer axis of the elliptical shape.
  • the medium to be measured flows according to the invention as in the
  • the high temperature sensor 30 is shown from the hot side, wherein also the angular recess 32a can be seen.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Thermistors And Varistors (AREA)

Abstract

L'invention concerne un capteur haute température comprenant un élément capteur pourvu d'une section de mesure orientée vers le côté chaud, et un dispositif de fixation disposé autour de l'élément capteur; le dispositif de fixation présentant un élément de fixation destiné à la fixation du capteur haute température dans un logement, notamment une vis ou un écrou, et un collet de fixation qui par rapport à l'élément de fixation est disposé sur le côté chaud du capteur haute température et qui est thermiquement découplé de l'élément de fixation.
EP13763239.4A 2012-09-17 2013-09-16 Découplage thermique de la fixation d'un capteur haute température dans un logement Withdrawn EP2895831A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202012103536 2012-09-17
PCT/EP2013/069157 WO2014041169A2 (fr) 2012-09-17 2013-09-16 Découplage thermique de la fixation d'un capteur haute température dans un logement

Publications (1)

Publication Number Publication Date
EP2895831A2 true EP2895831A2 (fr) 2015-07-22

Family

ID=49212769

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13763239.4A Withdrawn EP2895831A2 (fr) 2012-09-17 2013-09-16 Découplage thermique de la fixation d'un capteur haute température dans un logement

Country Status (4)

Country Link
US (1) US20150233768A1 (fr)
EP (1) EP2895831A2 (fr)
DE (1) DE102013015378A1 (fr)
WO (1) WO2014041169A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9416731B2 (en) * 2013-10-31 2016-08-16 General Electric Company Thermocouple assembly
FR3028946B1 (fr) * 2014-11-21 2021-05-14 Valeo Systemes De Controle Moteur Capteur de temperature

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4014361A1 (de) * 1990-05-04 1991-11-14 Werner & Pfleiderer Temperatursensor fuer misch- und knetmaschinen
DE4344174C2 (de) * 1993-12-23 1999-07-22 Temperaturmestechnik Geraberg Temperaturfühler
US5753835A (en) * 1996-12-12 1998-05-19 Caterpillar Inc. Receptacle for holding a sensing device
US6390670B1 (en) * 1999-08-06 2002-05-21 Pgi International Ltd. Temperature sensing device for metering fluids
DE102004010912C5 (de) * 2004-03-05 2012-04-05 Igema Gmbh Messsonde zur Bestimmung von physikalischen Parametern an oder in einem Kessel
JP4620400B2 (ja) * 2004-07-16 2011-01-26 日本特殊陶業株式会社 温度センサ、温度センサの製造方法
DE102008060033B4 (de) 2008-12-02 2013-08-14 Temperaturmeßtechnik Geraberg GmbH Temperaturfühler für Turbolader
DE102008060123B3 (de) 2008-12-03 2010-06-10 Continental Automotive Gmbh Hochtemperatursensor
US8545096B2 (en) * 2009-08-06 2013-10-01 Ge Infrastructure Sensing, Inc. Thermal sensor device and method of assembly
DE102010006740B4 (de) * 2010-02-03 2015-07-30 Igema Gmbh Messsonde

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014041169A3 *

Also Published As

Publication number Publication date
WO2014041169A3 (fr) 2014-07-31
US20150233768A1 (en) 2015-08-20
WO2014041169A2 (fr) 2014-03-20
DE102013015378A1 (de) 2014-03-20

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