Circuit for supplying oil to rolling bearing of twin spool turboshaft engine, has alarm varying unit varying alarm threshold according to engine speed from measurement of oil pressure, and for triggering alarm

摘要

The circuit has an oil recovery pump (28) that is mounted downstream of each of a set of chambers (10, 12, 14) for recovering lubricating oil supplied with rolling bearings and for returning the lubricating oil to an oil tank (16). A pressure sensor (36) is arranged upstream of the set of chambers to deliver a measurement of oil pressure. An alarm varying unit (34) or full authority digital engine control (FADEC) is utilized for varying alarm threshold according to engine speed from the measurement of oil pressure, and for triggering an alarm when a threshold variable is crossed.