GENERAL INFORMATION

Oil Management System

31. December 2024 JOEST Germany
JR Exciter lubrication Oil Management

In conventional exciters‭, ‬the bearings are lubricated by oil mist‭.‬‭ ‬The gears inside the housing churn the oil into fine droplets‭, ‬which are distributed within the gearbox‭. ‬Only a portion of these droplets reaches the rolling bearings and provide the lubrication‭. ‬Some housings have oil collection pockets on the inside‭. ‬These are intended to guide the oil along the inner surfaces of the housing downwards into the bearings‭. ‬However‭, ‬the entry of oil into the bearings is random and the quantity is undetermined. To improve the entire lubrication‭, ‬the JOEST‭ ‬Oil Management System‭ ‬has been developed‭.‬

The‭ ‬JOEST Exciter‭ ‬is equipped with an oil pump‭, ‬which is driven by the gears of the exciter drive‭. ‬Thus‭, ‬no auxiliary power is needed to operate‭ ‬the pump‭. ‬The oil pump draws oil from the sump of the housing and the oil enters thel filter‭, ‬where dirt particles‭ < ‬6‭ ‬µm are separated‭. ‬The oil filter is designed generously to be replaced after several oil changes‭.‬

Subsequently‭, ‬the oil flow is distributed to the four bearing units‭. ‬Through the circumferential groove on the outer ring of

the bearing‭, ‬the oil reaches the inside and flows from there through holes to the rolling elements‭. ‬Thus‭, ‬the oil flows axially‭ ‬from the center of the bearings outwards‭. ‬Any dirt that may occur in the housing is therefore not flushed into the bearings‭, ‬but‭ ‬is moved away from them‭. ‬Since the pump is firmly coupled with the movement of the exciter drive‭, ‬the lubrication is activated‭ ‬immediately upon startup and therefore eliminates the critical phase where the oil moist is initially formed‭.‬

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