EP2898229A1 - Bearing having an indicator - Google Patents

Bearing having an indicator

Info

Publication number
EP2898229A1
EP2898229A1 EP13759125.1A EP13759125A EP2898229A1 EP 2898229 A1 EP2898229 A1 EP 2898229A1 EP 13759125 A EP13759125 A EP 13759125A EP 2898229 A1 EP2898229 A1 EP 2898229A1
Authority
EP
European Patent Office
Prior art keywords
bearing
indicator
bearing according
reaching
cage
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Withdrawn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
EP13759125.1A
Other languages
German (de)
French (fr)
Inventor
Horst Brehm
Daniel Callies
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG 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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2898229A1 publication Critical patent/EP2898229A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • F16C17/24—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
    • 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
    • F16C19/522—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to load on the bearing, e.g. bearings with load sensors or means to protect the bearing against overload
    • 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
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
    • 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
    • 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 relates to a bearing, in particular rolling bearing, comprising as bearing parts at least one bearing ring, a sealing element or - if the bearing is designed as a rolling bearing - a cage.
  • Such bearings are designed and installed for rotatable and / or sliding storage of components. If the warehouse fails, it remains to be checked and if necessary to prove whether the damage is due to the fact that the warehouse was installed in a way for which it was not designed. For this purpose, the mechanical forces or stresses that have acted on the bearing during operation, to detect and prove.
  • the operating state of a bearing can be monitored by means of electronic sensors, for example by means of piezoelectric pressure sensors or strain gauges, however, such sensors that provide a continuous electrical signal, consuming and not without re-design of the camp to install.
  • This object is achieved according to the invention for the aforementioned bearing by a mechanically, in particular by shock and / or mechanical tensile or compressive stress releasable, arranged on the surface of the body of the bearing part indicator, which has an irreversible, optically detectable change upon reaching a limit.
  • the indicator indicates whether or not the bearing has been exposed during operation to a load above the design limit, so that this overload can be identified as a possible cause of the damage.
  • the indicator is easy to install without having to modify the bearing structurally.
  • Suitable indicators are generally known in the field of packaging, in particular as shock-watch indicators or as rice paint, and can be used for bearings for a modified purpose. It is preferably provided that the indicator comprises a rice paint.
  • the tear paint applied to the surface of the body of the bearing part exhibits line cracks which occur transversely to a tensile load direction and which are optically detectable by simple observation and not only qualitatively determine the achievement or exceeding of a mechanical stress, but also the detection of the load direction, along which the unacceptable mechanical stress has attacked.
  • the indicator performs a color change when the limit value is reached.
  • the indicator is a closed volume of a test liquid, in particular in a Glass tube, includes.
  • Such indicators are basically known as shockwatch indicators and are based on the principle that an impact breaks through the surface tension of the test fluid so that the test fluid changes color.
  • Such indicators can be used in bearings as impact indicators or as an indicator of exceeding an allowable limit speed.
  • the indicator comprises a test film.
  • the test film comprises a material which, when the limit value is reached, carries out a color change, so that, in particular, it is possible to detect mechanical stresses, especially on roller bearing cages, which consist of a stretchable material.
  • Fig. 1 shows a plan view of an embodiment of a bearing according to the invention.
  • Fig. 1 shows a trained as a rolling bearing, comprising as bearing parts a first, formed as an inner ring bearing ring 1, a second formed as an outer ring bearing ring 2, a cage 3 for guiding rolling elements, not shown, as well as a further bearing part illustrated bearing seal.
  • a shock-indicator is arranged as the first indicator 4, in order to detect radially acting forces with respect to the axis of rotation of the bearing, which occur jerkily and reach a limit, so that the first indicator 4 has an optically detectable color change performs.
  • the first indicator 4 comprises a closed volume of a test liquid in a glass tube, upon reaching the limit, the surface tension of the test liquid is broken and the test liquid performs the irreversible color change.
  • a second indicator 5 is arranged, which comprises a test film which performs a visually detectable, irreversible color change by mechanical stresses, if they reach a limit .
  • the second indicator 5 is arranged radially, ie in the direction of the centrifugal forces, directed, but could also be arranged in a modification of the illustrated embodiment in the circumferential direction of the cage 3, since in the circumferential direction, the material stresses in the cage 3 occur.
  • a portion is provided with a rice paint, wherein one of the four sections with the reference numeral '6' is designated and a third indicator 6 identifies.
  • the tear lacquer forms optically detectable, irreversible tear lines under mechanical tensile stresses, in particular transversely to the direction of the tensile stresses.
  • a circular segment-shaped portion of a pressure measuring film is arranged in each case, one of which by the reference numeral, 7 'and the fourth indicator 7 identifies.
  • the bearing further comprises at least two temperature indicators 8, 9, which are arranged on the cage 3, with respect to the axis of rotation radially opposite each other, on the lateral surface, adjacent to the end face of the cage 3, and perform an irreversible color change upon reaching a critical temperature which is optically detectable.
  • the bearing further comprises a moisture indicator, not shown, which performs a visually detectable irreversible color change upon reaching a critical humidity in the camp;
  • This moisture indicator is, for example, on the inner circumferential surface of the second bearing ring 2 or on the outer surface of the first bearing ring 1, near the end face of the respective bearing ring 1, 2, arranged to allow easy readout of the color of the moisture indicator.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

Bearing, in particular rolling bearing, comprising, as bearing parts, at least one bearing ring (1, 2), a sealing element or a cage (3). The object of specifying a bearing which can easily be retrofitted for subsequent damage analysis and does not necessitate any significant design modifications compared to standard bearings is achieved, according to the invention, for the bearing mentioned in the introduction by an indicator (4, 5, 6, 7) which can be triggered mechanically, in particular by impact and/or mechanical tensile or compressive stress, is arranged on the surface of the body of the bearing part and, when a limit value is reached, has an irreversible, visually ascertainable change.

Description

Bezeichnung der Erfindung  Name of the invention
LAGER MIT INDIKATOR BEAR WITH INDICATOR
Gebiet der Erfindung Field of the invention
Die Erfindung betrifft ein Lager, insbesondere Wälzlager, umfassend als Lagerteile mindestens einen Lagerring, ein Dichtelement oder - sofern das Lager als Wälzlager ausgebildet ist - einen Käfig. The invention relates to a bearing, in particular rolling bearing, comprising as bearing parts at least one bearing ring, a sealing element or - if the bearing is designed as a rolling bearing - a cage.
Derartige Lager werden zur drehbaren und / oder verschieblichen Lagerung von Komponenten ausgelegt und verbaut. Versagt das Lager, bleibt zu prüfen und ggf. nachzuweisen, ob der Schaden darauf zurückzuführen ist, dass das Lager in einer Weise verbaut worden war, für die es nicht ausgelegt war. Hierzu sind die mechanischen Kräfte bzw. Spannungen, die auf das Lager im Betrieb gewirkt haben, zu erfassen und nachzuweisen. Such bearings are designed and installed for rotatable and / or sliding storage of components. If the warehouse fails, it remains to be checked and if necessary to prove whether the damage is due to the fact that the warehouse was installed in a way for which it was not designed. For this purpose, the mechanical forces or stresses that have acted on the bearing during operation, to detect and prove.
Der Betriebszustand eines Lagers, auch in der Einbauposition, lässt sich mittels elektronischer Sensoren, beispielsweise mittels piezoelektrischen Drucksensoren oder Dehnungsmessstreifen, überwachen, allerdings sind derartige Sensoren, die ein kontinuierliches elektrisches Signal liefern, aufwendig und nicht ohne Neu-Auslegung des Lagers zu installieren. The operating state of a bearing, even in the installation position, can be monitored by means of electronic sensors, for example by means of piezoelectric pressure sensors or strain gauges, however, such sensors that provide a continuous electrical signal, consuming and not without re-design of the camp to install.
Aufgabe der Erfindung Object of the invention
Es ist die Aufgabe der Erfindung, ein für eine nachträgliche Schadensanalyse einfach nachrüstbares Lager anzugeben, das keine wesentlichen konstruktiven Abänderungen gegenüber Standard-Lagern erforderlich macht. Zusammenfassung der Erfindung It is the object of the invention to provide a simple nachrüstbares for a subsequent damage analysis bearing that makes no significant structural changes to standard bearings required. Summary of the invention
Diese Aufgabe wird erfindungsgemäß für das eingangs genannte Lager gelöst durch einen mechanisch, insbesondere durch Stoß und / oder mechanischer Zug- oder Druckspannung auslösbaren, an der Oberfläche des Korpus des Lagerteils angeordneten Indikator, der bei Erreichen eines Grenzwertes eine irreversible, optisch erfassbare Änderung aufweist. This object is achieved according to the invention for the aforementioned bearing by a mechanically, in particular by shock and / or mechanical tensile or compressive stress releasable, arranged on the surface of the body of the bearing part indicator, which has an irreversible, optically detectable change upon reaching a limit.
Der Indikator zeigt an, ob das Lager im Betrieb einer oberhalb des konstruktiv bedingten Grenzwertes vorgegebenen Belastung ausgesetzt war oder nicht, so dass diese Überlastung als mögliche Schadensursache ermittelt werden kann. The indicator indicates whether or not the bearing has been exposed during operation to a load above the design limit, so that this overload can be identified as a possible cause of the damage.
Der Indikator ist leicht anzubringen, ohne das Lager baulich abändern zu müssen. Geeignete Indikatoren sind grundsätzlich aus dem Gebiet des Verpackungswesens bekannt, insbesondere als Shockwatch-Indikatoren oder als Reisslack, und können, für einen abgewandelten Einsatzzweck, bei Lagern Verwendung finden. Vorzugsweise ist vorgesehen, dass der Indikator einen Reisslack umfasst. Der auf die Oberfläche des Korpus des Lagerteils aufgetragene Reisslack zeigt linienförmige Risse, die quer zu einer Zugbelastungsrichtung auftreten und die optisch durch einfache Betrachtung erfassbar sind, und ermöglicht nicht nur das Erreichen oder Überschreiten einer mechanischen Spannung qualitativ festzustellen, sondern ebenfalls die Erfassung der Lastrichtung, entlang derer die unzulässige mechanische Spannung angegriffen hat. The indicator is easy to install without having to modify the bearing structurally. Suitable indicators are generally known in the field of packaging, in particular as shock-watch indicators or as rice paint, and can be used for bearings for a modified purpose. It is preferably provided that the indicator comprises a rice paint. The tear paint applied to the surface of the body of the bearing part exhibits line cracks which occur transversely to a tensile load direction and which are optically detectable by simple observation and not only qualitatively determine the achievement or exceeding of a mechanical stress, but also the detection of the load direction, along which the unacceptable mechanical stress has attacked.
Vorzugsweise ist vorgesehen, dass der Indikator einen Farbumschlag bei Erreichen des Grenzwertes durchführt. Preferably, it is provided that the indicator performs a color change when the limit value is reached.
Insbesondere ist vorzugsweise vorgesehen, dass der Indikator ein abgeschlossenes Volumen einer Testflüssigkeit, insbesondere in einem Glasrohr, umfasst. Derartige Indikatoren sind als Shockwatch-Indikatoren grundsätzlich bekannt und beruhen auf dem Prinzip, dass ein Stoß die Oberflächenspannung der Testflüssigkeit durchbricht, so dass die Testflüssigkeit ihre Farbe ändert. Derartige Indikatoren lassen sich bei Lagern als Stoß-Indikatoren verwenden oder als Anzeiger eines Überschreitens einer zulässigen Grenzdrehzahl. In particular, it is preferably provided that the indicator is a closed volume of a test liquid, in particular in a Glass tube, includes. Such indicators are basically known as shockwatch indicators and are based on the principle that an impact breaks through the surface tension of the test fluid so that the test fluid changes color. Such indicators can be used in bearings as impact indicators or as an indicator of exceeding an allowable limit speed.
Vorzugsweise ist vorgesehen, dass der Indikator eine Testfolie umfasst. Die Testfolie umfasst ein Material, das bei Erreichen des Grenzwertes eine Farbänderung durchführt, so dass sich insbesondere mechanische Spannungen, speziell an Wälzlager-Käfigen, die aus einem dehnbaren Material bestehen, nachweisen lassen. It is preferably provided that the indicator comprises a test film. The test film comprises a material which, when the limit value is reached, carries out a color change, so that, in particular, it is possible to detect mechanical stresses, especially on roller bearing cages, which consist of a stretchable material.
Weitere Vorteile und Merkmale der Erfindung ergeben sich aus den abhängigen Ansprüchen sowie aus der Beschreibung eines Ausführungsbeispiels. Further advantages and features of the invention will become apparent from the dependent claims and from the description of an embodiment.
Die Erfindung wird im Folgenden unter Bezugnahme auf die anliegende Zeichnung näher beschrieben und erläutert. The invention will be described and explained in more detail below with reference to the accompanying drawings.
Kurze Beschreibung der Figur Brief description of the figure
Fig. 1 zeigt eine Draufsicht auf ein Ausführungsbeispiel eines erfindungsgemäßen Lagers. Fig. 1 shows a plan view of an embodiment of a bearing according to the invention.
Detaillierte Beschreibung der Figuren Detailed description of the figures
Fig. 1 zeigt ein als Wälzlager ausgebildetes Lager, umfassend als Lagerteile einen ersten, als Innenring ausgebildeten Lagerring 1 , einen zweiten, als Außenring ausgebildeten Lagerring 2, einen Käfig 3 zur Führung von nicht dargestellten Wälzkörpern, sowie als weiteres Lagerteil eine nicht dargestellte Lagerdichtung. Fig. 1 shows a trained as a rolling bearing, comprising as bearing parts a first, formed as an inner ring bearing ring 1, a second formed as an outer ring bearing ring 2, a cage 3 for guiding rolling elements, not shown, as well as a further bearing part illustrated bearing seal.
An der Stirnfläche des Korpus des Käfigs 3 ist als erster Indikator 4 eine Shockwatch-Indikator angeordnet, um bezogen auf die Drehachse des Lagers radial wirkende Kräfte zu erfassen, die stoßartig auftreten und einen Grenzwert erreichen, so dass der erste Indikator 4 einen optisch erfassbaren Farbumschlag durchführt. Der erste Indikator 4 umfasst ein abgeschlossenes Volumen einer Testflüssigkeit in einem Glasrohr, wobei bei Erreichen des Grenzwertes die Oberflächenspannung der Testflüssigkeit durchbrochen wird und die Testflüssigkeit den irreversiblen Farbumschlag durchführt. At the end face of the body of the cage 3, a shock-indicator is arranged as the first indicator 4, in order to detect radially acting forces with respect to the axis of rotation of the bearing, which occur jerkily and reach a limit, so that the first indicator 4 has an optically detectable color change performs. The first indicator 4 comprises a closed volume of a test liquid in a glass tube, upon reaching the limit, the surface tension of the test liquid is broken and the test liquid performs the irreversible color change.
An der Stirnfläche des Korpus des Käfigs 3 ist, bezogen auf die Drehachse dem ersten Indikator 4 radial gegenüberliegend, ein zweiter Indikator 5 angeordnet, der eine Testfolie umfasst, die durch mechanische Spannungen, sofern diese einen Grenzwert erreichen, einen optisch erfassbaren, irrreversiblen Farbumschlag durchführt. Der zweite Indikator 5 ist radial, also in Richtung der Fliehkräfte, gerichtet angeordnet, könnte aber in einer Abwandlung des dargestellten Ausführungsbeispiels auch in Umfangsrichtung des Käfigs 3 angeordnet sein, da auch in Umfangsrichtung die Materialspannungen in dem Käfig 3 auftreten. At the end face of the body of the cage 3, relative to the axis of rotation of the first indicator 4 radially opposite, a second indicator 5 is arranged, which comprises a test film which performs a visually detectable, irreversible color change by mechanical stresses, if they reach a limit , The second indicator 5 is arranged radially, ie in the direction of the centrifugal forces, directed, but could also be arranged in a modification of the illustrated embodiment in the circumferential direction of the cage 3, since in the circumferential direction, the material stresses in the cage 3 occur.
An der Stirnfläche sowohl des ersten Lagerrings 1 als auch des zweiten Lagerrings 2 ist jeweils ein Abschnitt mit einem Reisslack versehen, wobei einer der vier Abschnitte mit dem Bezugszeichen ,6' ausgewiesen ist und einen dritten Indikator 6 ausweist. Der Reisslack bildet unter mechanischen Zugspannungen insbesondere quer zu der Richtung der Zugspannungen optisch erfassbare, irreversible Risslinien aus. At the end face of both the first bearing ring 1 and the second bearing ring 2, a portion is provided with a rice paint, wherein one of the four sections with the reference numeral '6' is designated and a third indicator 6 identifies. The tear lacquer forms optically detectable, irreversible tear lines under mechanical tensile stresses, in particular transversely to the direction of the tensile stresses.
In Umfangsrichtung mittig zwischen je zwei Reisslack-Abschnitten sowohl des ersten Lagerrings 1 als auch des zweiten Lagerrings 2 ist jeweils ein kreissegmentförmiger Abschnitt einer Druckmessfolie angeordnet, von der einer durch das Bezugszeichen ,7' ausgewiesen ist und den vierten Indikator 7 ausweist. Bei mechanischer Belastung werden in der Druckmessfolie des vierten Indikators 7 irreversible mechanische Änderungen hervorgerufen, die beispielsweise mittels polarisiertem Licht optisch erfassbar sind. Das Lager umfasst weiter mindestens zwei Temperaturindikatoren 8, 9, die an dem Käfig 3, bezogen auf die Drehachse einander radial gegenüberliegend, an der Mantelfläche, angrenzend an die Stirnfläche des Käfigs 3, angeordnet sind, und bei Erreichen einer kritischen Temperatur einen irreversiblen Farbumschlag durchführen, der optisch erfassbar ist. In the circumferential direction centered between each two rice-lacquer sections of both the first bearing ring 1 and the second bearing ring 2, a circular segment-shaped portion of a pressure measuring film is arranged in each case, one of which by the reference numeral, 7 'and the fourth indicator 7 identifies. Under mechanical stress irreversible mechanical changes are caused in the pressure measuring film of the fourth indicator 7, which are optically detectable, for example by means of polarized light. The bearing further comprises at least two temperature indicators 8, 9, which are arranged on the cage 3, with respect to the axis of rotation radially opposite each other, on the lateral surface, adjacent to the end face of the cage 3, and perform an irreversible color change upon reaching a critical temperature which is optically detectable.
Das Lager umfasst weiter einen bildlich nicht dargestellten Feuchteindikator, der bei Erreichen einer kritischen Luftfeuchte in dem Lager einen optisch erfassbaren irreversiblen Farbumschlag durchführt; dieser Feuchteindikator ist beispielsweise an der inneren Mantelfläche des zweiten Lagerrings 2 oder an der äußeren Mantelfläche des ersten Lagerrings 1 , nahe der Stirnfläche des jeweiligen Lagerrings 1 , 2, angeordnet, um ein leichtes Auslesen der Farbe des Feuchteindikators zu ermöglichen. The bearing further comprises a moisture indicator, not shown, which performs a visually detectable irreversible color change upon reaching a critical humidity in the camp; This moisture indicator is, for example, on the inner circumferential surface of the second bearing ring 2 or on the outer surface of the first bearing ring 1, near the end face of the respective bearing ring 1, 2, arranged to allow easy readout of the color of the moisture indicator.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 erster Lagerring 1 first bearing ring
2 zweiter Lagerring 2 second bearing ring
3 Käfig  3 cage
4 erster Indikator  4 first indicator
5 zweiter Indikator  5 second indicator
6 dritter Indikator  6 third indicator
7 vierter Indikator 7 fourth indicator
8 Temperaturindikator  8 temperature indicator
9 Temperatunndikator  9 temperature indicator

Claims

Patentansprüche claims
Lager, insbesondere Wälzlager, umfassend als Lagerteile mindestens einen Lagerring (1 , 2), ein Dichtelement oder einen Käfig (3), Bearing, in particular rolling bearing, comprising as bearing parts at least one bearing ring (1, 2), a sealing element or a cage (3),
gekennzeichnet durch einen mechanisch, insbesondere durch Stoß und / oder mechanischer Zug- oder Druckspannung auslösbaren, an der Oberfläche des Korpus des Lagerteils angeordneten Indikator (4, 5, 6, 7), der bei Erreichen eines Grenzwertes eine irreversible, optisch erfassbare Änderung aufweist. characterized by a mechanically, in particular triggered by shock and / or mechanical tensile or compressive stress, arranged on the surface of the body of the bearing part indicator (4, 5, 6, 7), which has an irreversible, optically detectable change upon reaching a threshold value.
Lager nach Anspruch 1 , dadurch gekennzeichnet, dass der Indikator (4, 5) einen Farbumschlag bei Erreichen des Grenzwertes durchführt. Bearing according to claim 1, characterized in that the indicator (4, 5) performs a color change upon reaching the limit value.
Lager nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Indikator (4) ein abgeschlossenes Volumen einer Testflüssigkeit, insbesondere in einem Glasrohr, umfasst. Bearing according to claim 1 or 2, characterized in that the indicator (4) comprises a closed volume of a test liquid, in particular in a glass tube.
Lager nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Indikator (5) eine Testfolie umfasst. Bearing according to one of claims 1 or 2, characterized in that the indicator (5) comprises a test film.
Lager nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Indikator (7) eine Druckmessfolie umfasst. Bearing according to claim 1 or 2, characterized in that the indicator (7) comprises a pressure measuring film.
Lager nach einem der Ansprüche 1 bis 5, weiter umfassend einen Temperaturindikator (8, 9), der bei Erreichen einer kritischen Temperatur einen optisch erfassbaren Farbumschlag durchführt. Bearing according to one of claims 1 to 5, further comprising a temperature indicator (8, 9), which performs an optically detectable color change upon reaching a critical temperature.
Lager nach Anspruch 1 , dadurch gekennzeichnet, dass der Indikator (6) einen Reisslack umfasst. Bearing according to claim 1, characterized in that the indicator (6) comprises a rice paint.
EP13759125.1A 2012-09-19 2013-08-06 Bearing having an indicator Withdrawn EP2898229A1 (en)

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DE102012216762.5A DE102012216762A1 (en) 2012-09-19 2012-09-19 camp
PCT/DE2013/200102 WO2014044262A1 (en) 2012-09-19 2013-08-06 Bearing having an indicator

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US (1) US20150233418A1 (en)
EP (1) EP2898229A1 (en)
CN (1) CN104685236B (en)
DE (1) DE102012216762A1 (en)
WO (1) WO2014044262A1 (en)

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Publication number Publication date
US20150233418A1 (en) 2015-08-20
CN104685236B (en) 2017-07-18
CN104685236A (en) 2015-06-03
WO2014044262A1 (en) 2014-03-27
DE102012216762A1 (en) 2014-03-20

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