AUXILIARY BEARING OF THE BALL BEARING TYPE FOR A MAGNETICALLY SUSPENDED ROTOR SYSTEM

An assembly comprises a rotating shaft (104, 114) supported with respect to a stationary housing (105, 115) by at least one active magnetic bearing presenting a mean radial air gap and at least one auxiliary bearing (118) comprising first and second coaxially arranged annular surfaces (124, 123), on...

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Bibliographische Detailangaben
Hauptverfasser:	DA SILVA, JOAQUIM, ANDERS, JENS, PONSON, FREDERIC, BENDAOUD, MOHAMED, OLIVA, MATTHIEU
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BEARINGS BLASTING ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	An assembly comprises a rotating shaft (104, 114) supported with respect to a stationary housing (105, 115) by at least one active magnetic bearing presenting a mean radial air gap and at least one auxiliary bearing (118) comprising first and second coaxially arranged annular surfaces (124, 123), one (124) of the first and second coaxially arranged annular surfaces (124, 123) defining a clearance (E2) with one of the stationary housing (105, 115) and the rotating shaft (104, 114), the clearance (E2) being less than the mean radial air gap and the other (123) of the first and second coaxially arranged annular surfaces (124, 123) being integral with the other one of the stationary housing (105, 115) and the rotating shaft (104, 114). The auxiliary bearing (118) comprises a first ball bearing and a second ball bearing having a misalignment with respect to each other in order to increase the starting torque. Un ensemble comprend un arbre rotatif (104, 114) supporté par rapport à un boîtier fixe (105, 115) par au moins un palier magnétique actif présentant un entrefer radial moyen et au moins un palier auxiliaire (118) comprenant des première et seconde surfaces annulaires disposées coaxialement (124, 123), lune (124) des première et seconde surfaces annulaires agencées de manière coaxiale (124, 123) définissant un dégagement (E2) avec lun du boîtier fixe (105, 115) et de larbre rotatif (104, 114), le jeu (E2) étant inférieur à lentrefer radial moyen et lautre (123) des première et seconde surfaces annulaires disposées de manière coaxiale (124, 123) étant solidaire de lautre du boîtier fixe (105, 115) et de larbre rotatif (104, 114). Le palier auxiliaire (118) comprend un premier roulement à billes et un second roulement à billes ayant un désalignement lun par rapport à lautre afin daugmenter le couple de démarrage.