
2014-03-10 | 000-004-882 DE-DE
SCHAEFFLER AG, BARCELONA/SCHWEINFURT
Schaeffler auf der EWEA 2014 in Halle 6, Stand 6C50
Mittelfrequenzanw rmger t von Schaeffler f r eine einfache und flexible Lagermontage
Mittelfrequenztechnik ist die innovative L sung von Schaeffler zur induktiven Bauteilerw rmung von gro en und schweren Teilen. Die Induktion wird mit mittleren Frequenzen erzeugt und erm glicht eine Erw rmung der Lager in kurzer Zeit, um diese f r die Montage vorzubereiten. Besonders in der Windkraft, wo herk mmliche Methoden an ihre Grenzen sto en, bietet diese Technik Energieeffizienz, Sicherheit und einen hohen Grad an Flexibilit t. Denn das FAG-Mittelfrequenzanw rmger t von Schaeffler ist mobil und erm glicht das Anw rmen unterschiedlichster Werkst cke auch an schwer zug nglichen Orten. Es ist erheblich leichter als herk mmliche Netzfrequenzanlagen und flexible Induktoren erm glichen ein schnelles, sicheres und kontrolliertes Anw rmen. Durch unterschiedliche Versionen und kundenspezifische Designs l sst sich das Mittelfrequenzanw rmger t vielseitig einsetzen und bietet auch f r komplexe Anwendungen eine prozesssichere und wirtschaftliche L sung.
FAG-Mittelfrequenzanw rmger t f r mehr Flexibilit t
Es ist kaum vorstellbar, dass sich Lagerinnenringe mit einem Au endurchmesser von mehr als drei Metern und einem Gewicht von fast einer Tonne in deutlich weniger als einer Stunde erw rmen und somit montieren lassen. Mit dem FAG-Mittelfrequenzanw rmger t ist das m glich. Es besteht aus einem Generator und einem Induktor, je nach Anwendung kann dieser flexibel oder fest sein. Die flexible Version hnelt einem Kabel, das entweder au en am Werkst ck oder in der Bohrung platziert wird. Die L nge des flexiblen Induktors h ngt von der Anwendung ab und betr gt bis zu 50 Meter. Damit ist eine maximale Anpassungsf higkeit an unterschiedlich gro e und geformte Werkst cke m glich. Bei Anwendungen in der
Serienfertigung, wo gleiche Bauteile in gro er St ckzahl montiert werden, steht weniger die Flexibilit t im Vordergrund als vielmehr verk rzte R stzeiten und die Prozesssicherheit. Hier eignen sich feste Induktoren. Bei dieser Ausf hrung wird die Spule in einem an das Werkst ck angepassten Geh use verbaut und kann somit schnell und einfach in der Erw rmungszone platziert werden.
Kundenl sung mit festem Induktor in der Serienfertigung
Ein Kundenauftrag aus der Windkraft erforderte die Erw rmung dreier FAG-Pendelrollenlager gleicher Bauart mit unterschiedlichen Bohrungsdurchmessern von 800 bis 1.050 Millimetern. Der Kunde suchte nach einer Methode, seine Serienfertigung schneller, effizienter und prozesssicherer zu gestalten. Dar ber hinaus war ein homogenes Erw rmen gefordert, da ansonsten eine Besch digung der Lager h tte entstehen k nnen. Anhand der vom Kunden vorgegebenen Parameter, wie geometrische Daten, Einbausituation, Prozessbeschreibung und Stromversorgung, ermittelten die Schaeffler-Experten Leistung und Funktionalit t des Generators sowie das Induktor-Design. Sie entwickelten daf r drei unterschiedliche sogenannte Twin-Induktoren in fester Rahmen-Bauweise. In die Rahmen wurde die Induktorwicklung so integriert, dass Au en- und Innenring gleichzeitig erw rmt werden. So konnte der homogene Anw rmvorgang sichergestellt und gleichzeitig die daf r ben tigten Zeiten um 50% und die Energiekosten um mehr als 60% reduziert werden.
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