A DUAL CIRCUIT LUBRICATION METHOD AND DEVICE WITH INCREASED RELIABILITY FOR A MAIN POWER TRANSMISSION GEARBOX OF AN AIRCRAFT

摘要

The present invention relates to a lubrication device (1) dual-circuit of a mechanical system (3), said lubricating device (1) having two lubricating circuits (10,20) and independent from a reservoir (2) common to the two lubricating circuits (10,20) and containing a lubricating liquid. A first lubrication circuit (10) comprises two first suction point (16,17) of said lubricating liquid in said reservoir (2) and a second lubrication circuit (20) includes a second suction point (27) said lubricating liquid in said reservoir (2). Said lubricating device (1) dual-circuit comprises a passage detecting means below a limit height of said lubricating liquid in said container (2) formed by a first suction high point (16) located at said boundary height, said second suction point (27) being located below said limit height and a first low point of suction (17) being below said second suction point (27).