WO2012156456A1 - Bearing assembly and method for the operation thereof - Google Patents

Bearing assembly and method for the operation thereof Download PDF

Info

Publication number
WO2012156456A1
WO2012156456A1 PCT/EP2012/059148 EP2012059148W WO2012156456A1 WO 2012156456 A1 WO2012156456 A1 WO 2012156456A1 EP 2012059148 W EP2012059148 W EP 2012059148W WO 2012156456 A1 WO2012156456 A1 WO 2012156456A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
temperature
temperature difference
stored
determining
Prior art date
Application number
PCT/EP2012/059148
Other languages
German (de)
French (fr)
Inventor
Ferdinand Schweitzer
Original Assignee
Aktiebolaget Skf
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 Aktiebolaget Skf filed Critical Aktiebolaget Skf
Publication of WO2012156456A1 publication Critical patent/WO2012156456A1/en

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
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/541—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing
    • F16C19/542—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing with two rolling bearings with angular contact
    • F16C19/543—Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing with two rolling bearings with angular contact in O-arrangement
    • 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

Definitions

  • the invention relates to a bearing assembly comprising at least one bearing, wherein the bearing has at least one bearing inner ring and at least one bearing outer ring, wherein at least one temperature sensor is arranged on or in the bearing inner ring and on or in the bearing outer ring. Furthermore, the invention relates to a method for operating such a bearing arrangement.
  • bearing rings can be equipped with a temperature sensor so that the bearing temperature can be monitored.
  • Critical operating conditions which may lead to a temporary destruction of the warehouse, can be detected and countermeasures initiated.
  • the invention is based on the object, so to train a bearing assembly of the type mentioned above and to propose a corresponding method for operating the bearing, with or with which it is possible to monitor the condition of the bearing improved and to receive timely instructions, such as of the Wear state of the bearing is.
  • the criteria are to be monitored in a targeted manner, providing optimal information about this.
  • the solution to this problem by the invention is characterized in that means for determining the temperature difference between the temperature of the bearing inner ring and the temperature of the bearing outer ring are provided, wherein the means are formed upon reaching or exceeding a predetermined value for the temperature difference, a signal issue.
  • This signal will usually be a visual or audible warning indicating that abnormal or critical storage conditions exist. However, it can also be provided that the signal merely causes the detected operating state to be stored in a storage means. By later evaluation of the memory contents, the status of the bearing can then be deduced.
  • the at least one bearing is preferably a roller bearing.
  • the temperature sensors are preferably arranged in the region of the load zone of the bearing.
  • a particularly preferred solution provides that two bearings are arranged, which are designed as angular contact ball bearings and are axially biased against each other.
  • At least one further sensor for detecting the proportion of oil in the air or the oil mist content in the space between the bearing rings can be provided, wherein the sensor is connected to the means for determining the temperature difference.
  • At least one of the temperature sensors arranged on or in the bearing rings can be designed to transmit the measured temperature value wirelessly to the means. Accordingly, monitoring of a rotating sensor without complicated wiring is possible.
  • the method for operating such a bearing assembly is characterized by the steps of: a) measuring the temperature of the at least one bearing inner ring and supplying the signal to the means for determining the temperature difference; b) measuring the temperature of the at least one bearing outer ring and supplying the signal to the means for determining the temperature difference; c) determining the temperature difference between the bearing inner ring and the bearing outer ring and comparing the detected temperature difference with a reference value stored in the means; d) outputting a signal if the determined temperature difference is greater than the stored reference value and / or storing the determined temperature difference in a memory element.
  • the proportion of oil in the air or the oil mist content in the space between the bearing rings can thereby be determined according to the training and fed to the funds.
  • the allowable reference value of the temperature difference can be determined from stored data or from a stored function as a function of the (measured) oil content in the air or of the oil mist content. Accordingly, for example, a lower temperature difference value comes into play when a poor lubrication state of the bearing (low proportion of oil in the air or low oil mist) is detected; However, if there are good lubricating conditions (high oil content in the air or a lot of oil mist), a higher temperature difference value can be tolerated.
  • the measured values can be stored periodically in the memory element, the stored values being stored in a readable or transferable manner.
  • means for generating an oil mist can be integrated into the warehouse.
  • known solutions that use rotating discs that dip into an oil bath and thus produce oil mist.
  • the oil mist is then continuously generated during operation of the bearing assembly, thus providing optimum lubrication all the time.
  • the self-generating oil mist lubrication is thus generated by the fact that below the bearing a trough-like reservoir - preferably in the form of a ring trough - is formed; in this reservoir, the lubricating oil is introduced.
  • the oil reservoir can by a sealing element, for. B. by a sealing ring formed.
  • the field of application of the proposed invention is broad.
  • the invention has been proven in a separator (storage of the shaft of the separator), which is used in the food industry.
  • machine tools come as an application in question.
  • the or the camp may or may in principle be lubricated grease.
  • the initial greasing usually suffices for the first approx. 1000 operating hours for bearing lubrication.
  • the internal oil mist generator works and feeds fresh oil mist to the bearing point, ie to the rolling elements.
  • the base oil of the rolling bearing grease is used as oil.
  • the oil level (seen in a vertical position) is adjusted so that the sealing lip upper edge of a seal is not overfilled and thus the oil does not overflow.
  • the contacting seals which are preferably used are designed so that they seal in a contact-tight manner up to sealing lip sliding speeds of 90 m / s. By appropriate arrangement of the bearings all the usual designs can be realized ("back-to-back”, “face-to-face”, “tandem").
  • a bearing arrangement is proposed with the proposed embodiment, which is characterized by good monitoring, so that on the maintenance condition always the best possible statements can be made.
  • the maintenance of the bearing can be planned improved.
  • more accurate statements can be made about the remaining service life of the bearing. This topic is also referred to as "Condition Monitoring”.
  • a bearing assembly 1 which has two rolling bearings 2 and 3.
  • the two rolling bearings 2, 3 are designed as deep groove ball bearings. They each have a bearing inner ring 4 and 5 and associated bearing outer rings 6 and 7. Between the bearing rings 4, 5 and 6, 7 balls are arranged. All bearing rings 4, 5, 6, 7 are each provided with a temperature sensor 8, 9, 10, 1 1. The sensor is arranged at a suitable location. However, it is preferably provided that the sensors - as shown - are arranged in the load zone.
  • the respective bearing ring temperatures are measured, ie the bearing inner ring temperature of the bearing 2 T n , the bearing outer ring temperature of the bearing 2 T A1 , the bearing inner ring temperature of the bearing 3 T I2 and the bearing outer ring temperature of the bearing 3 ⁇ 2 ⁇
  • the measured values are passed to means 12 for determining the temperature difference ⁇ .
  • this is wireless.
  • ⁇ 1 TAI - T N
  • ⁇ ⁇ ⁇ - T I determined and compared with a stored reference value AT MAX , where it depends only on the amount of the determined difference values.
  • a signal S is output via an acoustic or optical warning device.
  • the determined values are stored in a memory element 14, if appropriate with assignment of the time of their occurrence.
  • a functional relationship can be stored in the means 12, which changes the permissible reference value as a function of the lubrication state of the bearing arrangement. The value can thus be increased if good lubrication conditions are detected; it can also be reduced if it is determined by sensor 13 that the lubrication conditions are unfavorable.
  • This functional relationship may be based on empirical experience and be fit into a corresponding mathematical function (eg, a higher-order polynomial).
  • the monitoring then takes place to the effect that first the oil content in the air or the oil mist content in the room by sensor 13 is measured.
  • This value is entered into the aforementioned functional relationship and the permissible reference value AT max calculated to that extent. This reference value is then used as the basis for the current temperature monitoring.

Abstract

The invention relates to a bearing assembly (1), comprising at least one bearing (2, 3), wherein the bearing (2, 3) has at least one inner bearing ring (4, 5) and at least one outer bearing ring (6, 7), wherein at least one temperature sensor (8, 9, 10, 11) is arranged on or in the inner bearing ring (4, 5) and on or in the outer bearing ring (6, 7). In order to be able to better monitor the operating behavior of the bearing assembly, according to the invention means (12) for determining the temperature difference (ΔΤ) between the temperature (TI1, TI2) of the inner bearing ring (4, 5) and the temperature (TA1, TA2) of the outer bearing ring (6, 7) are provided, wherein the means (12) are designed to output a signal (S) when a specified value of the temperature difference (ΔTmax) is reached. The invention further relates to a method for operating such a bearing assembly.

Description

B e s c h r e i b u n g  Description
Lageranordnung und Verfahren zu deren Betrieb Bearing arrangement and method for its operation
Die Erfindung betrifft eine Lageranordnung umfassend mindestens ein Lager, wobei das Lager mindestens einen Lagerinnenring und mindestens einen Lageraußenring aufweist, wobei am oder im Lagerinnenring und am oder im Lageraußenring mindestens ein Temperatursensor angeordnet ist. Des Weiteren betrifft die Erfindung ein Verfahren zum Betrieb einer solchen Lageranordnung. The invention relates to a bearing assembly comprising at least one bearing, wherein the bearing has at least one bearing inner ring and at least one bearing outer ring, wherein at least one temperature sensor is arranged on or in the bearing inner ring and on or in the bearing outer ring. Furthermore, the invention relates to a method for operating such a bearing arrangement.
Lageranordnungen dieser Art sind hinlänglich im Stand der Technik bekannt. Die Lagerringe können mit einem Temperatursensor ausgestattet werden, so dass die Lagertemperatur überwacht werden kann. Kritische Betriebszustände, die unter Umständen zu einer kurzfristigen Zerstörung des Lagers führen, können so erkannt und Gegenmaßnahmen eingeleitet werden. Bearing arrangements of this type are well known in the art. The bearing rings can be equipped with a temperature sensor so that the bearing temperature can be monitored. Critical operating conditions, which may lead to a temporary destruction of the warehouse, can be detected and countermeasures initiated.
Es hat sich herausgestellt, dass alleine die Lagertemperatur mitunter kein Kriterium ist, das genau genug über das Schädigungspotential Auskunft gibt, das auf das Lager wirkt. Vielmehr erscheint es, dass es einer weitergehenden Überwachung bedarf, um die Belastungssituation eines Lagers richtig einschätzen zu können. It has turned out that the storage temperature alone is sometimes not a criterion that provides accurate enough information about the damage potential that affects the bearing. On the contrary, it seems that further monitoring is required in order to be able to correctly assess the load situation of a warehouse.
Der Erfindung liegt die A u f g a b e zugrunde, eine Lageranordnung der eingangs genannten Art so fortzubilden und ein entsprechendes Verfahren zum Betrieb des Lagers vorzuschlagen, mit der bzw. mit dem es möglich ist, den Zustand des Lagers verbessert zu überwachen und rechtzeitige Hinweise zu erhalten, wie der Verschleißzustand des Lagers ist. Dabei sollen gezielt die Kriterien überwacht werden, die hierüber optimal Auskunft geben. The invention is based on the object, so to train a bearing assembly of the type mentioned above and to propose a corresponding method for operating the bearing, with or with which it is possible to monitor the condition of the bearing improved and to receive timely instructions, such as of the Wear state of the bearing is. In the process, the criteria are to be monitored in a targeted manner, providing optimal information about this.
Die L ö s u n g dieser Aufgabe durch die Erfindung ist dadurch gekennzeichnet, dass Mittel zur Ermittlung der Temperaturdifferenz zwischen der Temperatur des Lagerinnenrings und der Temperatur des Lageraußenrings vorhanden sind, wobei die Mittel ausgebildet sind, beim Erreichen oder Überschreiten eines vorgegebenen Wertes für die Temperaturdifferenz ein Signal auszugeben. The solution to this problem by the invention is characterized in that means for determining the temperature difference between the temperature of the bearing inner ring and the temperature of the bearing outer ring are provided, wherein the means are formed upon reaching or exceeding a predetermined value for the temperature difference, a signal issue.
Bei diesem Signal wird es sich zumeist um eine optische oder akustische Warnung handeln, die angibt, dass abnorme oder kritische Lagerzustände vorliegen. Es kann aber auch vorgesehen sein, dass das Signal lediglich veranlasst, dass der detektierte Betriebszustand in einem Speichermittel gespeichert wird. Durch späteres Auswerten des Speicherinhalts kann dann auf den Status des Lagers rückgeschlossen werden. This signal will usually be a visual or audible warning indicating that abnormal or critical storage conditions exist. However, it can also be provided that the signal merely causes the detected operating state to be stored in a storage means. By later evaluation of the memory contents, the status of the bearing can then be deduced.
Das mindestens eine Lager ist bevorzugt ein Wälzlager. Die Temperatursensoren sind bevorzugt im Bereich der Lastzone des Lagers angeordnet. The at least one bearing is preferably a roller bearing. The temperature sensors are preferably arranged in the region of the load zone of the bearing.
Eine besonders bevorzugte Lösung sieht vor, dass zwei Lager angeordnet sind, die als Schrägkugellager ausgebildet und gegeneinander axial vorgespannt sind. A particularly preferred solution provides that two bearings are arranged, which are designed as angular contact ball bearings and are axially biased against each other.
Mindestens ein weiterer Sensor zur Detektion des Ölanteils in der Luft oder des Öl- nebelgehalts im Zwischenraum zwischen den Lagerringen kann vorgesehen werden, wobei der Sensor mit den Mitteln zur Ermittlung der Temperaturdifferenz verbunden ist. Hierdurch wird es möglich, den Schmierungszustand im Lager (Ölanteil bzw. Ölnebelgehalt) mit in die Beurteilung des Schädigungsverlaufs des Lagers einfließen zu lassen. In diesem Zusammenhang ist festzustellen, dass höhere Temperaturdifferenzen zwischen den Lagerringen dann leichter vom Lager hingenommen werden können und weniger schädigenden Einfluss haben, wenn die Schmierverhältnisse entsprechend sind. Durch die Miterfassung des Schmierzustands lässt sich mithin eine verbesserte Aussage über den Status des Lagers und seiner verbleibenden Gebrauchsdauer machen. At least one further sensor for detecting the proportion of oil in the air or the oil mist content in the space between the bearing rings can be provided, wherein the sensor is connected to the means for determining the temperature difference. This makes it possible to incorporate the lubrication state in the bearing (oil content or oil mist content) in the assessment of the damage course of the bearing. In this context, it should be noted that higher temperature differences between the bearing rings can then be easily removed from the bearing and have less harmful influence if the lubrication conditions are appropriate. By Miterfassung the lubrication state can be thus make an improved statement about the status of the warehouse and its remaining service life.
Zumindest einer der an oder in den Lagerringen angeordneten Temperatursensoren kann ausgebildet sein, den gemessenen Temperaturwert drahtlos an die Mittel zu übertragen. Demgemäß wird eine Überwachung auch eines rotierenden Sensors ohne aufwändige Verkabelung möglich. At least one of the temperature sensors arranged on or in the bearing rings can be designed to transmit the measured temperature value wirelessly to the means. Accordingly, monitoring of a rotating sensor without complicated wiring is possible.
Das Verfahren zum Betrieb einer solchen Lageranordnung zeichnet sich durch die Schritte aus: a) Messung der Temperatur des mindestens einen Lagerinnenrings und Zuleiten des Signals zu den Mitteln zur Ermittlung der Temperaturdifferenz; b) Messung der Temperatur des mindestens einen Lageraußenrings und Zuleiten des Signals zu den Mitteln zur Ermittlung der Temperaturdifferenz; c) Ermittlung der Temperaturdifferenz zwischen dem Lagerinnenring und dem Lageraußenring und Vergleichen der ermittelten Temperaturdifferenz mit einem in den Mitteln gespeicherten Referenzwert; d) Ausgeben eines Signals, falls die ermittelte Temperaturdifferenz größer ist als der gespeicherte Referenzwert und/oder Speichern der ermittelten Temperaturdifferenz in einem Speicherelement. The method for operating such a bearing assembly is characterized by the steps of: a) measuring the temperature of the at least one bearing inner ring and supplying the signal to the means for determining the temperature difference; b) measuring the temperature of the at least one bearing outer ring and supplying the signal to the means for determining the temperature difference; c) determining the temperature difference between the bearing inner ring and the bearing outer ring and comparing the detected temperature difference with a reference value stored in the means; d) outputting a signal if the determined temperature difference is greater than the stored reference value and / or storing the determined temperature difference in a memory element.
Der Ölanteil in der Luft oder der Ölnebelgehalt im Zwischenraum zwischen den Lagerringen kann dabei fortbildungsgemäß ermittelt und den Mitteln zugeleitet werden. In den Mitteln kann der zulässige Referenzwert der Temperaturdifferenz anhand gespeicherter Daten oder anhand einer gespeicherten Funktion in Abhängigkeit des (gemessenen) Ölanteils in der Luft oder des Ölnebelgehalts festgelegt werden. Demgemäß kommt beispielsweise ein geringerer Temperatur-Differenzwert zum Tragen, wenn ein schlechter Schmierzustand des Lagers (geringer Ölanteil in der Luft bzw. geringer Ölnebel) detektiert wird; liegen indes gute Schmierverhältnisse vor (hoher Ölanteil in der Luft bzw. viel Ölnebel) kann ein höherer Temperatur- Differenzwert toleriert werden. The proportion of oil in the air or the oil mist content in the space between the bearing rings can thereby be determined according to the training and fed to the funds. In the means, the allowable reference value of the temperature difference can be determined from stored data or from a stored function as a function of the (measured) oil content in the air or of the oil mist content. Accordingly, for example, a lower temperature difference value comes into play when a poor lubrication state of the bearing (low proportion of oil in the air or low oil mist) is detected; However, if there are good lubricating conditions (high oil content in the air or a lot of oil mist), a higher temperature difference value can be tolerated.
Falls kein oder nur unzureichend Ölnebel generiert wird, tritt Mangelschmierung ein und als Folge erhöht sich die Belastung des Lagers. Generell erhöht sich dabei die Temperatur des Lagers. If no or only insufficient oil mist is generated, insufficient lubrication occurs and, as a consequence, the load on the bearing increases. Generally, the temperature of the bearing increases.
In den Mitteln können die gemessenen Werte periodisch in dem Speicherelement gespeichert werden, wobei die gespeicherten Werte auslesbar oder übertragbar abgespeichert sind. In the means, the measured values can be stored periodically in the memory element, the stored values being stored in a readable or transferable manner.
Mit Vorteil können Mittel zur Erzeugung eines Ölnebels in das Lager integriert werden. Hierbei sind Lösungen bekannt, die rotierende Scheiben einsetzen, die in ein Ölbad eintauchen und so Ölnebel erzeugen. Der Ölnebel wird dann kontinuierlich während des Betriebs der Lageranordnung erzeugt und stellt somit ständig eine optimale Schmierung zur Verfügung. Die selbstgenerierende Ölnebelschmierung wird also dadurch erzeugt, dass unterhalb des Lagers ein wannenähnliches Reservoir - bevorzugt in Form einer Ringwanne - ausgebildet ist; in dieses Reservoir wird das Schmieröl eingebracht. Das Ölreservoir kann durch ein Dichtungselement, z. B. durch einen Dichtungsring, gebildet werden. Advantageously, means for generating an oil mist can be integrated into the warehouse. Here are known solutions that use rotating discs that dip into an oil bath and thus produce oil mist. The oil mist is then continuously generated during operation of the bearing assembly, thus providing optimum lubrication all the time. The self-generating oil mist lubrication is thus generated by the fact that below the bearing a trough-like reservoir - preferably in the form of a ring trough - is formed; in this reservoir, the lubricating oil is introduced. The oil reservoir can by a sealing element, for. B. by a sealing ring formed.
Das Anwendungsgebiet der vorgeschlagenen Erfindung ist breit. Beispielsweise hat sich die Erfindung in einem Separator (Lagerung der Welle des Separators) bewährt, der in der Lebensmittelindustrie eingesetzt wird. Genauso kommen beispielsweise Werkzeugmaschinen als Anwendungsfeld in Frage. Das bzw. die Lager kann bzw. können grundsätzlich fettge schmiert sein. Die Erst- befettung reicht üblicherweise für die ersten ca. tausend Betriebs stunden zur Lagerschmierung aus. Unabhängig von der Befettung arbeitet der interne Ölnebelgenera- tor und führt frischen Ölnebel zu der Lagerstelle, d. h. zu den Wälzkörpern. Bevorzugt wird dabei das Grundöl des Wälzlagerfetts als Öl verwendet. The field of application of the proposed invention is broad. For example, the invention has been proven in a separator (storage of the shaft of the separator), which is used in the food industry. Likewise, for example, machine tools come as an application in question. The or the camp may or may in principle be lubricated grease. The initial greasing usually suffices for the first approx. 1000 operating hours for bearing lubrication. Regardless of the lubrication, the internal oil mist generator works and feeds fresh oil mist to the bearing point, ie to the rolling elements. Preferably, the base oil of the rolling bearing grease is used as oil.
Der Ölstand (in vertikaler Lage gesehen) wird so eingestellt, dass die Dichtlippenoberkante einer Abdichtung dabei nicht überfüllt wird und das Öl somit nicht überläuft. Die vorzugsweise zum Einsatz kommenden berührenden Dichtungen sind dabei so ausgelegt, dass diese bis zu Dichtlippengleitgeschwindigkeiten von 90 m/s berührend abdichten. Durch entsprechende Anordnung der Wälzlager können alle üblichen Ausführungen realisiert werden („back-to-back";„face-to-face"; „tan- dem"). The oil level (seen in a vertical position) is adjusted so that the sealing lip upper edge of a seal is not overfilled and thus the oil does not overflow. The contacting seals which are preferably used are designed so that they seal in a contact-tight manner up to sealing lip sliding speeds of 90 m / s. By appropriate arrangement of the bearings all the usual designs can be realized ("back-to-back", "face-to-face", "tandem").
Demgemäß wird mit der vorgeschlagenen Ausgestaltung eine Lageranordnung vorgeschlagen, die sich durch eine gute Überwachung auszeichnet, so dass über den Wartungszustand stets bestmögliche Aussagen gemacht werden können. Somit kann die Wartung des Lagers verbessert geplant werden. Weiterhin können genauere Aussagen über die verbleibende Gebrauchsdauer des Lagers gemacht werden. Dieses Thema wird auch unter der Bezeichnung„Condition Monitoring" geführt. Accordingly, a bearing arrangement is proposed with the proposed embodiment, which is characterized by good monitoring, so that on the maintenance condition always the best possible statements can be made. Thus, the maintenance of the bearing can be planned improved. Furthermore, more accurate statements can be made about the remaining service life of the bearing. This topic is also referred to as "Condition Monitoring".
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Die einzige Figur zeigt den Radialschnitt durch eine Lageranordnung. In the drawing, an embodiment of the invention is shown. The single figure shows the radial section through a bearing assembly.
In der Figur ist eine Lageranordnung 1 dargestellt, die zwei Wälzlager 2 und 3 aufweist. Die beiden Wälzlager 2, 3 sind als Rillenkugellager ausgebildet. Sie haben jeweils einen Lagerinnenring 4 bzw. 5 und zugehörige Lageraußenringe 6 bzw. 7. Zwischen den Lagerringen 4, 5 und 6, 7 sind Kugeln angeordnet. Alle Lagerringe 4, 5, 6, 7 sind mit je einem Temperatursensor 8, 9, 10, 1 1 versehen. Der Sensor ist dabei an einer geeigneten Stelle angeordnet. Bevorzugt ist allerdings vorgesehen, dass die Sensoren - wie dargestellt - in der Lastzone angeordnet sind. In the figure, a bearing assembly 1 is shown, which has two rolling bearings 2 and 3. The two rolling bearings 2, 3 are designed as deep groove ball bearings. They each have a bearing inner ring 4 and 5 and associated bearing outer rings 6 and 7. Between the bearing rings 4, 5 and 6, 7 balls are arranged. All bearing rings 4, 5, 6, 7 are each provided with a temperature sensor 8, 9, 10, 1 1. The sensor is arranged at a suitable location. However, it is preferably provided that the sensors - as shown - are arranged in the load zone.
Mit den Sensoren 8, 9, 10, 1 1 werden die jeweiligen Lagerringtemperaturen gemessen, d. h. die Lagerinnenringtemperatur des Lagers 2 Tn, die Lageraußenringtemperatur des Lagers 2 TA1, die Lagerinnenringtemperatur des Lagers 3 TI2 und die Lageraußenringtemperatur des Lagers 3 ΤΑ2· With the sensors 8, 9, 10, 1 1, the respective bearing ring temperatures are measured, ie the bearing inner ring temperature of the bearing 2 T n , the bearing outer ring temperature of the bearing 2 T A1 , the bearing inner ring temperature of the bearing 3 T I2 and the bearing outer ring temperature of the bearing 3 ΤΑ2 ·
Die gemessenen Werte werden zu Mitteln 12 zur Ermittlung der Temperaturdifferenz ΔΤ geleitet. Für die rotierenden Sensoren 8 und 10 erfolgt dies drahtlos. The measured values are passed to means 12 for determining the temperature difference ΔΤ. For the rotating sensors 8 and 10, this is wireless.
In den Mitteln 12 werden die jeweiligen Temperaturdifferenzen In the means 12, the respective temperature differences
ΔΤ1 = TAI - TN ΔΤ 1 = TAI - T N
und and
ΔΤ = Τ^ - TI bestimmt und mit einem gespeicherte Referenzwert ATMAX verglichen, wobei es lediglich auf den Betrag der ermittelten Differenzwerte ankommt. ΔΤ = Τ ^ - T I determined and compared with a stored reference value AT MAX , where it depends only on the amount of the determined difference values.
In Abhängigkeit des Ergebnisses des Vergleichs können entsprechende Maßnahmen veranlasst werden. Möglich ist es, dass beim Überschreiben des Referenzwertes ein Signal S über ein akustisches oder optisches Warngerät ausgegeben wird. Es ist aber auch möglich, dass die ermittelten Werte - gegebenenfalls unter Zuordnung des Zeitpunkts ihres Auftretens - in einem Speicherelement 14 gespeichert werden. Depending on the result of the comparison, appropriate measures can be taken. It is possible that when overwriting the reference value, a signal S is output via an acoustic or optical warning device. However, it is also possible that the determined values are stored in a memory element 14, if appropriate with assignment of the time of their occurrence.
Hierbei kann vorgesehen werden, dass Informationen von einem Sensor 13 zur Ermittlung des Olanteils in der Luft bzw. des Ölnebelgehalts im Raum zwischen den Lagerringen herangezogen wird, den Referenzwerte ATMAX zu bewerten bzw. zu relativieren. Hierzu kann in den Mitteln 12 ein funktionaler Zusammenhang gespeichert sein, dass den zulässigen Referenzwert in Abhängigkeit des Schmierungszustands der Lageranordnung verändert. Der Wert kann so erhöht werden, wenn gute Schmierverhältnisse detektiert werden; er kann auch vermindert werden, wenn per Sensor 13 festgestellt wird, dass die Schmierverhältnisse ungünstig sind. It can be provided that information from a sensor 13 for determining the Olanteils in the air or the oil mist content in the space between the bearing rings is used to evaluate the reference values AT MAX or relativise. For this purpose, a functional relationship can be stored in the means 12, which changes the permissible reference value as a function of the lubrication state of the bearing arrangement. The value can thus be increased if good lubrication conditions are detected; it can also be reduced if it is determined by sensor 13 that the lubrication conditions are unfavorable.
Demgemäß wird also im genannten Fall ein funktionaler Zusammenhang definiert (zulässiger Referenzwert ATmax = f (Ölanteil in der Luft / Ölnebelgehalt im Raum)), der gespeichert wird. Dieser funktionale Zusammenhang kann auf empirischen Erfahrungen basieren und in eine entsprechende mathematische Funktion gefasst sein (z. B. in ein Polynom höherer Ordnung). Die Überwachung findet dann dahingehend statt, dass zunächst der Ölanteil in der Luft bzw. der Ölnebelgehalt im Raum per Sensor 13 gemessen wird. Dieser Wert wird in den genannten funktonalen Zusammenhang eingegeben und der insoweit zulässiger Referenzwert ATmax berechnet. Dieser Referenzwert wird dann der aktuellen Temperaturüberwachung zugrunde gelegt. Accordingly, in the case mentioned, a functional relationship is defined (permissible reference value AT max = f (oil content in the air / oil mist content in the room)), which is stored. This functional relationship may be based on empirical experience and be fit into a corresponding mathematical function (eg, a higher-order polynomial). The monitoring then takes place to the effect that first the oil content in the air or the oil mist content in the room by sensor 13 is measured. This value is entered into the aforementioned functional relationship and the permissible reference value AT max calculated to that extent. This reference value is then used as the basis for the current temperature monitoring.
Mit der vorgeschlagenen Ausgestaltung einer Lageranordnung kann ein verbessertes Online-Monitoring der Anordnung erfolgen, so dass verbesserte Hinweise auf den Wartungszustand bzw. auf die Wartungsnotwendigkeit und auf die verbleibende Gebrauchsdauer der Lager möglich sind. Somit wird es möglich, einen unzulässigen Betriebszustand frühzeitig zu erkennen und einen Lageraustausch zeitgerecht zu planen. Bezugszeichenliste With the proposed embodiment of a bearing arrangement, an improved on-line monitoring of the arrangement can take place so that improved indications of the maintenance condition or the need for maintenance and the remaining service life of the bearings are possible. This makes it possible to detect an inadmissible operating state at an early stage and to schedule a stock exchange in a timely manner. LIST OF REFERENCE NUMBERS
1 Lageranordnung 1 bearing arrangement
2 Lager (Wälzlager)  2 bearings (rolling bearings)
3 Lager (Wälzlager)  3 bearings (rolling bearings)
4 Lagerinnenring  4 bearing inner ring
5 Lagerinnenring  5 bearing inner ring
6 Lageraußenring  6 bearing outer ring
7 Lageraußenring  7 bearing outer ring
8 Temperatursensor  8 temperature sensor
9 Temperatursensor  9 temperature sensor
10 Temperatursensor  10 temperature sensor
1 1 Temperatursensor  1 1 temperature sensor
12 Mittel zur Ermittlung der Temperaturdifferenz 12 means for determining the temperature difference
13 Sensor zur Detektion des Olanteils / Ölnebelgehalts13 Sensor for detecting oil content / oil mist content
14 Speicherelement 14 memory element
ΔΤ Temperaturdifferenz ΔΤ temperature difference
Tu Temperatur des Lagerinnenrings  Tu temperature of the bearing inner ring
Ti2 Temperatur des Lagerinnenrings  Ti2 temperature of the bearing inner ring
TAI Temperatur des Lageraußenrings  TAI temperature of the bearing outer ring
TA2 Temperatur des Lageraußenrings  TA2 Temperature of bearing outer ring
Δ z-1Τ ί max Referenzwert für die Temperaturdifferenz s Signal Δ z - 1 Τ ί max reference value for the temperature difference s signal

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Lageranordnung (1) umfassend mindestens ein Lager (2, 3), wobei das Lager (2, 3) mindestens einen Lagerinnenring (4, 5) und mindestens einen Lageraußenring (6, 7) aufweist, wobei am oder im Lagerinnenring (4, 5) und am oder im Lageraußenring (6, 7) mindestens ein Temperatursensor (8, 9, 10, 1 1) angeordnet ist, dadurch gekennzeichnet, dass 1. Bearing arrangement (1) comprising at least one bearing (2, 3), wherein the bearing (2, 3) at least one bearing inner ring (4, 5) and at least one bearing outer ring (6, 7), wherein on or in the bearing inner ring (4 , 5) and at or in the bearing outer ring (6, 7) at least one temperature sensor (8, 9, 10, 1 1) is arranged, characterized in that
Mittel (12) zur Ermittlung der Temperaturdifferenz (ΔΤ) zwischen der Temperatur (Tn, TI2) des Lagerinnenrings (4, 5) und der Temperatur (TA1, T^) des Lageraußenrings (6, 7) vorhanden sind, wobei die Mittel (12) ausgebildet sind, beim Erreichen oder Überschreiten eines vorgegebenen Wertes für die Temperaturdifferenz (ATmax) ein Signal (S) auszugeben. Means (12) for determining the temperature difference (ΔΤ) between the temperature (T n , T I2 ) of the bearing inner ring (4, 5) and the temperature (T A1 , T ^) of the bearing outer ring (6, 7) are present, the Means (12) are designed to output when reaching or exceeding a predetermined value for the temperature difference (AT max ) a signal (S).
2. Lageranordnung nach Anspruch 1, dadurch gekennzeichnet, dass das mindestens eine Lager (2, 3) ein Wälzlager ist. 2. Bearing arrangement according to claim 1, characterized in that the at least one bearing (2, 3) is a rolling bearing.
3. Lageranordnung nach Anspruch 2, dadurch gekennzeichnet, dass die Temperatursensoren (8, 9, 10, 1 1) im Bereich der Lastzone des Lagers (2, 3) angeordnet sind. 3. Bearing arrangement according to claim 2, characterized in that the temperature sensors (8, 9, 10, 1 1) in the region of the load zone of the bearing (2, 3) are arranged.
4. Lageranordnung nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass zwei Lager (2, 3) angeordnet sind, die als Schrägkugellager ausgebildet und gegeneinander axial vorgespannt sind. 4. Bearing arrangement according to claim 2 or 3, characterized in that two bearings (2, 3) are arranged, which are formed as angular contact ball bearings and are axially biased against each other.
5. Lageranordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass mindestens ein Sensor (13) zur Detektion des Ölanteils in der Luft oder des Ölnebelgehalts im Zwischenraum zwischen den Lagerringen (4, 5, 6, 7) angeordnet ist, wobei der Sensor (13) mit den Mitteln (12) zur Ermittlung der Temperaturdifferenz (ΔΤ) verbunden ist. 5. Bearing arrangement according to one of claims 1 to 4, characterized in that at least one sensor (13) for detecting the proportion of oil in the air or the oil mist content in the space between the bearing rings (4, 5, 6, 7) is arranged, wherein the Sensor (13) with the means (12) for determining the temperature difference (ΔΤ) is connected.
6. Lageranordnung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass zumindest einer der an oder in den Lagerringen (4, 5, 6, 7) angeordneten Temperatursensoren (8, 9, 10, 1 1) ausgebildet ist, den gemessenen Temperaturwert (Tn, TI2) drahtlos an die Mittel (12) zu übertragen. 6. Bearing arrangement according to one of claims 1 to 5, characterized in that at least one of the on or in the bearing rings (4, 5, 6, 7) arranged temperature sensors (8, 9, 10, 1 1) is formed, the measured temperature value (T n , T I2 ) wirelessly to the means (12) to transmit.
7. Verfahren zum Betrieb einer Lageranordnung (1) nach einem der Ansprüche 1 bis 6, umfassend die Schritte: a) Messung der Temperatur (Tn, TI2) des mindestens einen Lagerinnenrings (4, 5) und Zuleiten des Signals zu den Mitteln (12) zur Ermittlung der Temperaturdifferenz (AT); b) Messung der Temperatur (TAI, T^) des mindestens einen Lageraußenrings (6, 7) und Zuleiten des Signals zu den Mitteln (12) zur Ermittlung der Temperaturdifferenz (AT); c) Ermittlung der Temperaturdifferenz (ΔΤ) zwischen dem Lagerinnenring (4, 5) und dem Lageraußenring (6, 7) und Vergleichen der ermittelten Temperaturdifferenz (ΔΤ) mit einem in den Mitteln (12) gespeicherten Referenzwert (ATmax); d) Ausgeben eines Signals (S), falls die ermittelte Temperaturdifferenz (ΔΤ) größer ist als der gespeicherte Referenzwert (ATmax) und/oder Speichern der ermittelten Temperaturdifferenz (ΔΤ) in einem Speicherelement (14). 7. A method for operating a bearing assembly (1) according to any one of claims 1 to 6, comprising the steps of: a) measuring the temperature (T n , T I2 ) of the at least one bearing inner ring (4, 5) and supplying the signal to the means (12) for determining the temperature difference (AT); b) measuring the temperature (T AI , T ^) of the at least one bearing outer ring (6, 7) and supplying the signal to the means (12) for determining the temperature difference (AT); c) determining the temperature difference (ΔΤ) between the bearing inner ring (4, 5) and the bearing outer ring (6, 7) and comparing the determined temperature difference (ΔΤ) with a reference value (AT max ) stored in the means (12); d) outputting a signal (S) if the determined temperature difference (ΔΤ) is greater than the stored reference value (AT max ) and / or storing the determined temperature difference (ΔΤ) in a memory element (14).
8. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Ölanteil in der Luft oder der Ölnebelgehalt im Zwischenraum zwischen den Lagerringen (4, 5, 6, 7) ermittelt und den Mitteln (12) zugeleitet wird. 8. The method according to claim 1, characterized in that the oil content in the air or the oil mist content in the space between the bearing rings (4, 5, 6, 7) determined and the means (12) is fed.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass in den Mitteln (12) der zulässige Referenzwert (ATmax) der Temperaturdifferenz anhand gespeicherter Daten oder anhand einer gespeicherten Funktion in Abhängigkeit des Ölanteils in der Luft oder des Ölnebelgehalts festgelegt wird. 9. The method according to claim 8, characterized in that in the means (12) the allowable reference value (AT max ) of the temperature difference is determined based on stored data or on the basis of a stored function as a function of the oil content in the air or the oil mist content.
10. Verfahren nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass in den Mitteln (12) die gemessenen Werte periodisch in dem Speicherelement (14) gespeichert werden, wobei die gespeicherte Werte auslesbar oder übertragbar abgespeichert sind. 10. The method according to any one of claims 7 to 9, characterized in that in the means (12) the measured values are stored periodically in the memory element (14), wherein the stored values are stored readable or transferable.
PCT/EP2012/059148 2011-05-19 2012-05-16 Bearing assembly and method for the operation thereof WO2012156456A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110076099 DE102011076099B4 (en) 2011-05-19 2011-05-19 Method for operating a bearing arrangement
DE102011076099.7 2011-05-19

Publications (1)

Publication Number Publication Date
WO2012156456A1 true WO2012156456A1 (en) 2012-11-22

Family

ID=46354157

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/059148 WO2012156456A1 (en) 2011-05-19 2012-05-16 Bearing assembly and method for the operation thereof

Country Status (2)

Country Link
DE (1) DE102011076099B4 (en)
WO (1) WO2012156456A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10215227B2 (en) * 2012-08-06 2019-02-26 Windfin B.V. Control method, program and system for controlling the bearing preload of a wind turbine and wind turbine comprising such control system
DE102020216210A1 (en) 2020-12-17 2022-06-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein System and method for thermal monitoring of large rolling bearings

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4514123A (en) * 1981-10-29 1985-04-30 Kearney & Trecker Corporation Adaptive control system for machine tool or the like
JPH11118622A (en) * 1997-10-17 1999-04-30 Nippon Seiko Kk Rotating body equipment
DE19944652A1 (en) * 1999-09-17 2002-05-16 Skf Gmbh Bearing arrangement for paper machine drying cylinders, has temperature sensors with wireless transmission capability attached to inner and outer bearing rings
JP2008157340A (en) * 2006-12-22 2008-07-10 Ntn Corp Rolling bearing

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10017572B4 (en) * 2000-04-10 2008-04-17 INSTITUT FüR MIKROTECHNIK MAINZ GMBH Rolling bearings with remote sensing units
DE10121730A1 (en) * 2001-05-04 2002-11-28 Man B & W Diesel As Kopenhagen Increasing explosion proofing of large diesel engine e.g. for ship, by applying mist of water droplets to inside of engine housing in the event of high temperatures
CH698379B1 (en) * 2004-05-10 2009-07-31 Hsu Chuan Li Machine comprises an oil mist detector and a temperature monitoring module for monitoring the lubricant state via temperature monitoring channels and the temperature at bearing positions and on the stator
JP2007138974A (en) * 2005-11-15 2007-06-07 Nsk Ltd Rolling bearing with temperature sensor
DE102006008176A1 (en) * 2006-02-22 2007-08-30 Ab Skf Bearing arrangement for mounting impression roll in printing press, has sensor and exciter element, which are arranged on inner ring or on component which is connected to inner ring, where detecting unit detects and forwards signal
JP2009036312A (en) * 2007-08-02 2009-02-19 Ntn Corp Bearing device
DE102007036271A1 (en) * 2007-07-31 2009-02-05 Baumer Hübner GmbH Encoder with monitoring of bearing wear and method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4514123A (en) * 1981-10-29 1985-04-30 Kearney & Trecker Corporation Adaptive control system for machine tool or the like
JPH11118622A (en) * 1997-10-17 1999-04-30 Nippon Seiko Kk Rotating body equipment
DE19944652A1 (en) * 1999-09-17 2002-05-16 Skf Gmbh Bearing arrangement for paper machine drying cylinders, has temperature sensors with wireless transmission capability attached to inner and outer bearing rings
JP2008157340A (en) * 2006-12-22 2008-07-10 Ntn Corp Rolling bearing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10215227B2 (en) * 2012-08-06 2019-02-26 Windfin B.V. Control method, program and system for controlling the bearing preload of a wind turbine and wind turbine comprising such control system
DE102020216210A1 (en) 2020-12-17 2022-06-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein System and method for thermal monitoring of large rolling bearings
DE102020216210B4 (en) 2020-12-17 2022-11-10 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein System and method for thermal monitoring of large rolling bearings

Also Published As

Publication number Publication date
DE102011076099A1 (en) 2012-11-22
DE102011076099B4 (en) 2012-12-06

Similar Documents

Publication Publication Date Title
DE60002450T2 (en) ONE AXLE HUB UNIT FOR RAIL VEHICLES
DE69732183T2 (en) BEARING WITH A SENSOR MODULE
DE102017213623A1 (en) Bearing diagnostic device
EP2927662B1 (en) Method and system for monitoring the status of a roller bearing of a wind turbine
US20190250066A1 (en) Monitoring method and monitoring apparatus for determining remaining life of a bearing
EP2131178A1 (en) Diagnostic method for at least one ball bearing, in particular for an angular ball bearing, a corresponding diagnostic system and the use of such a diagnostic system
EP3019845A1 (en) Method and arrangement for monitoring an industrial device such as, for example, a machine or a system
WO2011018492A1 (en) Bearing assembly having lubricant sensor
EP3483581B1 (en) Method and device for monitoring a bearing clearance of rolling bearings
DE102017223386A1 (en) Slide bearing assembly for a heavy shaft, in particular a wind turbine, and control system and method for lubricating oil supply thereof
DE102004048649A1 (en) Checking method, for monitoring condition of roller bearing in device with roller bearings and for forecasting its service life, uses computer evaluation with measured variable
DE102011076099B4 (en) Method for operating a bearing arrangement
DE102014104964A1 (en) Method for identifying critical operating conditions of rolling bearings
DE102016005214A1 (en) Device for checking a state of a machine part
US10508690B2 (en) Rolling-element bearing assembly
WO2017125104A1 (en) Method and measuring assembly for detecting slip in rolling bearings
EP2805073A1 (en) Device with at least one rolling element and method for outputting a signal
DE102016204979A1 (en) Capacitance measurement in a bearing housing
Dempsey et al. Investigation of tapered roller bearing damage detection using oil debris analysis
DE102009059655A1 (en) Lubricant monitoring device for wind power plant, comprises lubricant containing sample area, and sensor, which work together with sample area, where sample area is arranged in sections inside antifriction bearing
DE102012220261A1 (en) Bearing for supporting converter vessel used during production of steel and non-ferrous metal materials, has sensor for monitoring of bearing condition, that is arranged inside of bearing housing
DE3234443A1 (en) Device for detecting thermally active changes of state in bearings
EP3774064B1 (en) Method by which a lubricant throughflow at a centrifuge is monitored
DE102020216210B4 (en) System and method for thermal monitoring of large rolling bearings
DE112020000770T5 (en) Storage device and spindle device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12729368

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12729368

Country of ref document: EP

Kind code of ref document: A1