WO2008113330A1 - Device for monitoring the operating temperature of a bearing - Google Patents

Device for monitoring the operating temperature of a bearing Download PDF

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Publication number
WO2008113330A1
WO2008113330A1 PCT/DE2008/000451 DE2008000451W WO2008113330A1 WO 2008113330 A1 WO2008113330 A1 WO 2008113330A1 DE 2008000451 W DE2008000451 W DE 2008000451W WO 2008113330 A1 WO2008113330 A1 WO 2008113330A1
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WO
WIPO (PCT)
Prior art keywords
temperature
bearing
monitoring
sensitive element
operating temperature
Prior art date
Application number
PCT/DE2008/000451
Other languages
German (de)
French (fr)
Inventor
Michael Pausch
Original Assignee
Schaeffler 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 Schaeffler Kg filed Critical Schaeffler Kg
Publication of WO2008113330A1 publication Critical patent/WO2008113330A1/en

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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
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
    • 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
    • G01K13/04—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies
    • G01K13/08—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies in rotary movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2233/00—Monitoring condition, e.g. temperature, load, vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/042—Housings for rolling element bearings for rotary movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/008—Identification means, e.g. markings, RFID-tags; Data transfer means

Definitions

  • the invention is in the field of storage technology, in particular the rolling bearing technology, and relates to a device for monitoring the operating temperature of a bearing.
  • thermocouples It is known (JP 2002 130 263 A, JP 2006 058 226 A) to monitor the storage temperature by means of thermocouples. This monitoring principle is based on the fact that a thermocouple generates an electrical output signal that changes depending on the current storage temperature. However, such monitoring is relatively expensive and expensive because it requires a relatively complex structure, electrical connections and wiring, a power supply and increased installation costs. If information about the temperature profile in the past operation is also desired, storage options for the monitoring data or monitoring results must be provided.
  • an object of the present invention is to realize the temperature monitoring of a bearing simple and maintenance-free.
  • the device according to the invention comprises a temperature-sensitive element which is arranged in the region of the bearing and which changes its color as a function of the temperature.
  • color changes are to be understood as meaning, in particular, changes in color, hues and / or intensity, but also transparency or reflectivity.
  • Such an element may, for example, be realized by containing a substance with different color, optical transparency or reflection properties depending on the temperature.
  • Color change elements are basically known from the foodstuffs industry (DE 202005 012 001 U1) and serve as proof of a complete cold chain.
  • the following substances or materials are suitable, for example, for color change temperature display, wherein in each case the approximate color change limit is specified.
  • An essential aspect of the invention is the realization of a temperature monitoring in bearings, in particular rolling bearings, which includes in a new way an indicator that manages without energy supply. This eliminates the problems mentioned above with regard to electrical contacting, wiring and power supply and also the maintenance effort (for example also for the replacement of a unit or energy storage unit otherwise necessary for the energy supply).
  • the visual display is easy to recognize and allows an assessment of the storage condition even by untrained personnel.
  • the special advantage of a maintenance-free bearing temperature detection is achieved, which even with any necessary disassembly work on the camp hardly causes additional effort, because the temperature-sensitive element can be easily removed without connections or cables must be solved.
  • the device according to the invention requires very little space and can be integrated in a simple manner in bearing structures.
  • thermosensitive element is a coating. This can be particularly preferably printed.
  • FIG. 2 shows a longitudinal section of a rolling bearing with a second device according to the invention.
  • the bearing supports a shaft or wheel axle 3.
  • the housing 2 comprises a housing cover 5, which covers one end of the wheel axle 3 and is releasably connected by means of screws with the rest of the housing.
  • the rolling bearing 1 has a peripheral bearing seal 6.
  • the temperature-sensitive element changes its color with the temperature; It changes its color irreversibly when a storage-specific predetermined temperature limit is exceeded.
  • the device according to FIG. 2 contains, in addition to the element 8, further temperature-sensitive elements 9 and 10 with corresponding temperature-dependent properties, wherein each element 9, 10 has a different temperature limit from which an irreversible color change occurs. By thus possibly detected and stored limit value excesses a finely resolved temperature monitoring is realized.
  • the temperature-sensitive elements are configured as coatings 11, 12, 13, which are printed on a flat outer surface 14 of the housing cover 5. LIST OF REFERENCE NUMBERS

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The invention relates to a device for monitoring the operating temperature (T) of a bearing (1), comprising a temperature sensitive element (8), which is disposed in the region of the bearing and changes color as a function of the temperature (T).

Description

Vorrichtung zur Überwachung der Betriebstemperatur eines Lagers Device for monitoring the operating temperature of a bearing
Beschreibungdescription
Gebiet der ErfindungField of the invention
Die Erfindung liegt auf dem Gebiet der Lagertechnik, insbesondere der Wälzlagertechnik, und betrifft eine Vorrichtung zur Überwachung der Betriebstemperatur eines Lagers.The invention is in the field of storage technology, in particular the rolling bearing technology, and relates to a device for monitoring the operating temperature of a bearing.
Lager sind in vielfältigen Einsatzgebieten erheblichen mechanischen und thermischen Belastungen ausgesetzt, wobei von ihnen lange störungsfreie Standzeiten erwartet werden. Besonders kritisch sind dabei so genannte Heißläufer, bei denen beispielsweise durch Mangelschmierung, Verschleiß oder Überhitzung fortschreitende Lagerschäden auftreten, die ungünstigs- tenfalls zum Festsetzen des Lagers und damit zu erheblichen Störungen des Betriebs führen können. Deshalb besteht ein Bedarf, betriebsgemäß oder bei Störungen auftretende thermische Überlastungen erkennen zu können. Unangenehmerweise treten die Folgen von thermischen Überlastungen nämlich mitunter erst zeitverzögert als Spätfolgeschäden in Erscheinung, so dass beispielsweise ein Fahrzeug mit einem bereits initiierten Lagerschaden noch weiter eingesetzt wird und ein zum Ausfall führender Lagerschaden ungüns- tigstenfalls auf freier Strecke eintritt. Es ist bekannt (JP 2002 130 263 A; JP 2006 058 226 A), die Lagertemperatur mittels Thermoelementen zu überwachen. Dieses Überwachungsprinzip beruht darauf, dass ein Thermoelement ein elektrisches Ausgangssignal generiert, das sich in Abhängigkeit von der aktuellen Lagertemperatur än- dert. Eine solche Überwachung ist allerdings verhältnismäßig aufwendig und teuer, weil sie einen relativ komplexen Aufbau, elektrische Anschlüsse und Verkabelungen, eine Energieversorgung und erhöhten Montageaufwand erfordert. Ist auch eine Information über den Temperaturverlauf im zurückliegenden Betrieb erwünscht, müssen Speichermöglichkeiten für die Überwa- chungsdaten bzw. Überwachungsergebnisse vorgesehen werden.Bearings are exposed to considerable mechanical and thermal loads in a variety of applications, with long trouble-free lifetimes being expected from them. Particularly critical are so-called hot runners, in which, for example, by insufficient lubrication, wear or overheating progressive bearing damage occur, the worst case can lead to setting of the bearing and thus to significant disruption of the operation. Therefore, there is a need to be able to recognize thermal overloads occurring in accordance with the operation or in the case of faults. Disagreeably, the consequences of thermal overloads are sometimes only delayed in appearance as consequential damage, so that, for example, a vehicle with an already initiated bearing damage continues to be used and, in the worst case scenario, leading to bearing damage occurs on the open road. It is known (JP 2002 130 263 A, JP 2006 058 226 A) to monitor the storage temperature by means of thermocouples. This monitoring principle is based on the fact that a thermocouple generates an electrical output signal that changes depending on the current storage temperature. However, such monitoring is relatively expensive and expensive because it requires a relatively complex structure, electrical connections and wiring, a power supply and increased installation costs. If information about the temperature profile in the past operation is also desired, storage options for the monitoring data or monitoring results must be provided.
Vor diesem Hintergrund besteht eine Aufgabe der vorliegenden Erfindung darin, die Temperaturüberwachung eines Lagers einfach und wartungsfrei zu realisieren.Against this background, an object of the present invention is to realize the temperature monitoring of a bearing simple and maintenance-free.
Diese Aufgabe wird erfindungsgemäß gelöst durch eine Vorrichtung mit den Merkmalen des Anspruchs 1.This object is achieved by a device having the features of claim 1.
Demgemäß umfasst die erfindungsgemäße Vorrichtung ein temperatursensi- tives Element, das im Bereich des Lagers angeordnet ist und das in Abhängigkeit der Temperatur seine Farbe ändert. Unter Farbänderung sind im Rahmen der vorliegenden Erfindung insbesondere Änderungen der Färbung, Farbtöne und/oder Intensität, aber auch Transparenz oder Reflektionsver- mögen zu verstehen. Ein solches Element kann beispielsweise dadurch rea- lisiert sein, dass es einen Stoff mit je nach Temperatur unterschiedlicher Farbe, optischer Transparenz oder Reflektionseigenschaften enthält.Accordingly, the device according to the invention comprises a temperature-sensitive element which is arranged in the region of the bearing and which changes its color as a function of the temperature. In the context of the present invention, color changes are to be understood as meaning, in particular, changes in color, hues and / or intensity, but also transparency or reflectivity. Such an element may, for example, be realized by containing a substance with different color, optical transparency or reflection properties depending on the temperature.
Farbumschlagselemente sind grundsätzlich aus der Lebensmittelbranche bekannt (DE 202005 012 001 U1) und dienen dort zum Nachweis einer lü- ckenlosen Tiefkühlkette. Folgende Stoffe oder Materialien sind z.B. zur Farbumschlag-Temperaturanzeige geeignet, wobei jeweils auch die ungefähre Farbumschlaggrenze angegeben ist. Bis-diethylammonium-tetrachloro-cupratOI) (NH2C2Hs)2[CuCI4]: grün < 52° < gelb Ag2[HgJ4]: gelb < 53°C < orange Cu2[HgJ4]: rot < 65°C < braun/schwarz Bi2O3: gelb < 100°C < rotbraun HgJ2: gelb < 127°C < gelb AgJ: gelb < 147°C < orangeColor change elements are basically known from the foodstuffs industry (DE 202005 012 001 U1) and serve as proof of a complete cold chain. The following substances or materials are suitable, for example, for color change temperature display, wherein in each case the approximate color change limit is specified. Bis-diethylammonium tetrachloro-cuprateOI) (NH 2 C 2 Hs) 2 [CuCl 4 ]: green <52 ° <yellow Ag 2 [HgJ 4 ]: yellow <53 ° C <orange Cu 2 [HgJ 4 ]: red < 65 ° C <brown / black Bi 2 O 3 : yellow <100 ° C <red brown HgJ 2 : yellow <127 ° C <yellow AgJ: yellow <147 ° C <orange
Ein wesentlicher Aspekt der Erfindung ist die Realisierung einer Temperaturüberwachung bei Lagern, insbesondere Wälzlagern, die in neuer Weise ei- nen Indikator umfasst, der ohne Energieversorgung auskommt. Damit entfallen die eingangs genannten Probleme hinsichtlich elektrischer Kontaktierung, Verkabelung und Energieversorgung und auch der Wartungsaufwand (z.B. auch für den Wechsel einer ansonsten zur Energieversorgung notwendigen Einheit oder Energiespeichers). Die optische Anzeige ist leicht zu erkennen und erlaubt eine Beurteilung des Lagerzustandes auch durch ungeübtes Personal.An essential aspect of the invention is the realization of a temperature monitoring in bearings, in particular rolling bearings, which includes in a new way an indicator that manages without energy supply. This eliminates the problems mentioned above with regard to electrical contacting, wiring and power supply and also the maintenance effort (for example also for the replacement of a unit or energy storage unit otherwise necessary for the energy supply). The visual display is easy to recognize and allows an assessment of the storage condition even by untrained personnel.
Damit ist also der besondere Vorteil einer wartungsfreien lagerseitigen Temperaturerfassung erreicht, die auch bei etwaigen notwendigen Demontage- arbeiten an dem Lager kaum zusätzlichen Aufwand verursacht, weil das temperatursensitive Element einfach entfernt werden kann, ohne dass Anschlüsse oder Kabel gelöst werden müssen. Zudem ist ein weiterer Vorteil, dass die erfindungsgemäße Vorrichtung sehr wenig Bauraum erfordert und so in einfacher Weise in Lagerkonstruktionen integriert werden kann.Thus, the special advantage of a maintenance-free bearing temperature detection is achieved, which even with any necessary disassembly work on the camp hardly causes additional effort, because the temperature-sensitive element can be easily removed without connections or cables must be solved. In addition, a further advantage that the device according to the invention requires very little space and can be integrated in a simple manner in bearing structures.
Nach einer vorteilhaften Ausgestaltung der Erfindung ist vorgesehen, dass das temperatursensitive Element beim Überschreiten eines Temperaturgrenzwerts, z.B. 100°C, eine irreversible Farbänderung zeigt. Damit gibt die Vorrichtung auch Informationen über die thermische Belastungshistorie, in- dem nämlich das Überschreiten einer lagespezifischen Temperatur eine Farbänderung manifestiert und diese so auch noch zu einem späteren Zeitpunkt erkennbar ist. Es ist dabei besonders bevorzugt, mehrere temperatur- sensitive Elemente vorzusehen, die gestaffelte Temperaturgrenzwerte für eine irreversible Farbänderung haben. Damit ist eine feinere Auflösung der Temperaturhistorie im Bereich der kritischen Lagertemperatur möglich.According to an advantageous embodiment of the invention, it is provided that the temperature-sensitive element when exceeding a temperature limit, for example 100 ° C, shows an irreversible color change. Thus, the device also gives information about the thermal load history, namely namely the exceeding of a position-specific temperature manifests a change in color and this is still recognizable at a later time. It is particularly preferred to use a plurality of to provide sensitive elements that have staggered temperature limits for irreversible color change. Thus, a finer resolution of the temperature history in the range of critical storage temperature is possible.
Ein besonderer Aspekt der Erfindung ist wie erwähnt die einfache und kostengünstige Bereitstellung einer zuverlässigen Temperaturüberwachung. Vor diesem Hintergrund sieht eine bevorzugte Weiterbildung der Erfindung vor, dass das temperatursensitive Element eine Beschichtung ist. Diese kann besonders bevorzugt aufgedruckt sein.A particular aspect of the invention, as mentioned, is the simple and inexpensive provision of reliable temperature monitoring. Against this background, a preferred development of the invention provides that the temperature-sensitive element is a coating. This can be particularly preferably printed.
Nach montage- und herstellungstechnisch vorteilhaften Fortbildungen der Erfindung ist vorgesehen, dass das temperatursensitive Element auf einem Lagerdeckel oder an einer Lagerdichtung angeordnet ist.After assembling and manufacturing technically advantageous developments of the invention, it is provided that the temperature-sensitive element is arranged on a bearing cap or on a bearing seal.
Weitere Vorteile und Aspekte der Erfindung ergeben sich auch oder ergänzend aus der nachfolgenden Beschreibung der Erfindung unter Bezugnahme auf die Zeichnung.Further advantages and aspects of the invention will become apparent or supplementary from the following description of the invention with reference to the drawings.
Darin zeigen:Show:
Figur 1 im Längsschnitt ein Wälzlager mit einer ersten erfindungsgemäßen Vorrichtung undFigure 1 in longitudinal section a rolling bearing with a first device according to the invention and
Figur 2 im Längsschnitt ein Wälzlager mit einer zweiten erfindungsgemä- ßen Vorrichtung.2 shows a longitudinal section of a rolling bearing with a second device according to the invention.
In den Figuren 1 und 2 sind gleiche oder baugleiche Teile mit denselben Bezugszeichen versehen. Figur 1 zeigt im Längsschnitt ein Wälzlager 1 mit einem teilweise dargestellten Gehäuse 2. Das Lager lagert eine Welle oder Radachse 3. Das Gehäuse 2 umfasst einen Gehäusedeckel 5, der ein Ende der Radachse 3 abdeckt und mittels Schrauben lösbar mit dem übrigen Gehäuse verbunden ist. Das Wälzlager 1 weist eine umlaufende Lagerdichtung 6 auf.In FIGS. 1 and 2, identical or identical parts are provided with the same reference numerals. The bearing supports a shaft or wheel axle 3. The housing 2 comprises a housing cover 5, which covers one end of the wheel axle 3 and is releasably connected by means of screws with the rest of the housing. The rolling bearing 1 has a peripheral bearing seal 6.
Eine Vorrichtung 7 zur Überwachung der Betriebstemperatur T des Lagers weist ein im Bereich des Lagers und zwar in diesem Ausführungsbeispiel unmittelbar auf einer an dem Lager befindlichen Lagerdichtung 6 angeordne- tes temperatursensitives Element 8 auf. Dieses enthält als temperatursensibles, bei unterschiedlichen Temperaturen unterschiedliche Färbungen oder Farbtöne aufweisendes, Material beispielsweise Bi2O3, das bei Raumtemperatur gelb ist und beim Überschreiten einer Grenztemperatur von 1000C in rotbraun umschlägt.A device 7 for monitoring the operating temperature T of the bearing has a temperature-sensitive element 8 arranged in the region of the bearing, specifically in this embodiment, directly on a bearing seal 6 located on the bearing. This contains as temperature-sensitive, at different temperatures different colors or shades exhibiting material, for example, Bi 2 O 3 , which is yellow at room temperature and turns when it exceeds a limit temperature of 100 0 C in reddish brown.
Wie in Figur 2 gezeigt, kann alternativ oder zusätzlich das temperatursensitive Element auch an dem Gehäusedeckel 5 angeordnet sein. Dies hat den Vorteil der besonders leichten Erkennbarkeit von Temperaturgrenzwertüberschreitungen. Andererseits ist natürlich mit zunehmendem räumlichem Ab- stand von dem Lager eine erhöhte Ungenauigkeit verbunden.As shown in FIG. 2, alternatively or additionally, the temperature-sensitive element can also be arranged on the housing cover 5. This has the advantage of particularly easy recognizability of temperature limit violations. On the other hand, of course, an increased inaccuracy is associated with increasing spatial distance from the bearing.
Das temperatursensitive Element verändert mit der Temperatur seine Farbe; dabei ändert es beim Überschreiten eines lagerspezifisch vorgegebenen Temperaturgrenzwerts seine Färbung irreversibel. Die Vorrichtung nach Fi- gur 2 enthält neben dem Element 8 noch weitere temperatursensitive Elemente 9 und 10 mit entsprechenden temperaturabhängigen Eigenschaften, wobei jedes Element 9, 10 einen unterschiedlichen Temperaturgrenzwert aufweist, ab dem eine irreversible Farbänderung eintritt. Durch die so ggf. detektierten und gespeicherten Grenzwertüberschreitungen ist eine fein auf- gelöste Temperaturüberwachung realisiert. Die temperatursensitiven Elemente sind als Beschichtungen 11 , 12,13 ausgestaltet, die auf einer ebenen Außenfläche 14 des Gehäusedeckels 5 aufgedruckt sind. BezugszeichenlisteThe temperature-sensitive element changes its color with the temperature; It changes its color irreversibly when a storage-specific predetermined temperature limit is exceeded. The device according to FIG. 2 contains, in addition to the element 8, further temperature-sensitive elements 9 and 10 with corresponding temperature-dependent properties, wherein each element 9, 10 has a different temperature limit from which an irreversible color change occurs. By thus possibly detected and stored limit value excesses a finely resolved temperature monitoring is realized. The temperature-sensitive elements are configured as coatings 11, 12, 13, which are printed on a flat outer surface 14 of the housing cover 5. LIST OF REFERENCE NUMBERS
1 Wälzlager1 rolling bearing
2 Gehäuse 3 Radachse2 housing 3 wheel axle
5 Gehäusedeckel5 housing cover
6 Lagerdichtung6 bearing seal
7 Vorrichtung7 device
8, 9, 10 temperatursensitive Elemente 11 , 12,13 Beschichtungen8, 9, 10 temperature-sensitive elements 11, 12, 13 coatings
14 Außenfläche14 outer surface
T Betriebstemperatur T operating temperature

Claims

Patentansprüche claims
1. Vorrichtung zur Überwachung der Betriebstemperatur (T) eines Lagers (1) mit einem temperatursensitiven Element (8), das im Bereich des Lagers angeordnet ist und das in Abhängigkeit der Temperatur (T) seine Farbe ändert.1. A device for monitoring the operating temperature (T) of a bearing (1) with a temperature-sensitive element (8) which is arranged in the region of the bearing and which changes its color as a function of the temperature (T).
2. Vorrichtung nach Anspruch 1 , wobei das temperatursensitive Element (8) beim Überschreiten eines Temperaturgrenzwerts eine irreversible Farbänderung zeigt.2. Device according to claim 1, wherein the temperature-sensitive element (8) when exceeding a temperature limit shows an irreversible color change.
3. Vorrichtung nach Anspruch 1 oder 2, wobei mehrere temperatursensi- tive Elemente (8, 9, 10) vorgesehen sind, die gestaffelte Temperaturgrenzwerte für eine jeweilige irreversible Farbänderung haben.3. Device according to claim 1 or 2, wherein a plurality of temperature-sensitive elements (8, 9, 10) are provided which have staggered temperature limits for a respective irreversible color change.
4. Vorrichtung nach Anspruch 1 , 2 oder 3, wobei das temperatursensitive Element (8) eine Beschichtung (11 , 12, 13) ist.4. Apparatus according to claim 1, 2 or 3, wherein the temperature-sensitive element (8) is a coating (11, 12, 13).
5. Vorrichtung nach Anspruch 4, wobei die Beschichtung (11 , 12,13) aufgedruckt ist.5. Apparatus according to claim 4, wherein the coating (11, 12,13) is printed.
6. Vorrichtung nach einem der vorangehenden Ansprüche, wobei das temperatursensitive Element auf einem Lagerdeckel angeordnet ist.6. Device according to one of the preceding claims, wherein the temperature-sensitive element is arranged on a bearing cap.
7. Vorrichtung nach einem der Ansprüche 1 bis 5, wobei das tempera- tursensitive Element an einer Lagerdichtung angeordnet ist. 7. Device according to one of claims 1 to 5, wherein the tempera- Tursensitive element is arranged on a bearing seal.
PCT/DE2008/000451 2007-03-21 2008-03-13 Device for monitoring the operating temperature of a bearing WO2008113330A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200720004159 DE202007004159U1 (en) 2007-03-21 2007-03-21 Bearing`s e.g. antifriction bearing, operating temperature monitoring device for vehicle, has indicator without power supply, and temperature sensitive arranged on bearing cover, where unit changes its color based on operating temperature
DE202007004159.4 2007-03-21

Publications (1)

Publication Number Publication Date
WO2008113330A1 true WO2008113330A1 (en) 2008-09-25

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Application Number Title Priority Date Filing Date
PCT/DE2008/000451 WO2008113330A1 (en) 2007-03-21 2008-03-13 Device for monitoring the operating temperature of a bearing

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DE (1) DE202007004159U1 (en)
WO (1) WO2008113330A1 (en)

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CN113446969A (en) * 2021-09-01 2021-09-28 山东铭弘新能源科技有限公司 Bearing cap automatic line on-line measuring system

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DE102009048301A1 (en) 2009-10-05 2011-04-07 Schaeffler Technologies Gmbh & Co. Kg Sensor for detecting vibrations of bearing, has display element comprising electro-optical component controlled by electric impulse that is delivered by piezoelectric sensor, where component is provided with electrochromic coating
DE102009048300A1 (en) 2009-10-05 2011-04-07 Schaeffler Technologies Gmbh & Co. Kg Sensor for detecting vibrations of bearing, has energy storage provided for intermediate storage of energy that is provided from piezoelectric sensor, where energy storage is unloaded by display element
DE102013223436B4 (en) 2013-11-18 2015-12-31 Saf-Holland Gmbh The wheel bearing assembly
DE102016123359B4 (en) * 2016-12-02 2021-02-04 Saf-Holland Gmbh Wheel hub, system of wheel cap and wheel hub, wheel bearing arrangement and method for monitoring a wheel hub temperature
DE102022124480A1 (en) 2022-09-23 2024-03-28 R. Stahl Schaltgeräte GmbH Sealing arrangement and method for monitoring the condition and/or leakage of the seal

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US2928791A (en) * 1953-02-12 1960-03-15 Joseph D Loconti Temperature indicators
US3569695A (en) * 1969-07-22 1971-03-09 Schaefer Equip Railroad car axle bearing overheat indicator
US3877411A (en) * 1973-07-16 1975-04-15 Railtech Ltd Temperature indicator bolts
GB1604990A (en) * 1978-05-31 1981-12-16 Ransome Hoffmann Pollard Bearing condition monitoring
US20020051593A1 (en) * 2000-10-31 2002-05-02 Ntn Corporation Bearing assembly with temperature sensor
DE202005012001U1 (en) * 2005-03-08 2005-12-15 Schmidt, Hans-Joachim Irreversible temperature measurement tape for deep frozen products consists of four separate measurement fields designed in four different ranges and reacts to varying heat action by irreversible colour change
JP2006058226A (en) * 2004-08-23 2006-03-02 Nsk Ltd Temperature sensor and temperature-sensor equipped bearing device

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Publication number Priority date Publication date Assignee Title
US2928791A (en) * 1953-02-12 1960-03-15 Joseph D Loconti Temperature indicators
US3569695A (en) * 1969-07-22 1971-03-09 Schaefer Equip Railroad car axle bearing overheat indicator
US3877411A (en) * 1973-07-16 1975-04-15 Railtech Ltd Temperature indicator bolts
GB1604990A (en) * 1978-05-31 1981-12-16 Ransome Hoffmann Pollard Bearing condition monitoring
US20020051593A1 (en) * 2000-10-31 2002-05-02 Ntn Corporation Bearing assembly with temperature sensor
JP2006058226A (en) * 2004-08-23 2006-03-02 Nsk Ltd Temperature sensor and temperature-sensor equipped bearing device
DE202005012001U1 (en) * 2005-03-08 2005-12-15 Schmidt, Hans-Joachim Irreversible temperature measurement tape for deep frozen products consists of four separate measurement fields designed in four different ranges and reacts to varying heat action by irreversible colour change

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113446969A (en) * 2021-09-01 2021-09-28 山东铭弘新能源科技有限公司 Bearing cap automatic line on-line measuring system

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