A TRIPLE CIRCUIT LUBRICATION DEVICE WITH INCREASED RELIABILITY FOR A MAIN POWER TRANSMISSION GEARBOX OF AN AIRCRAFT

摘要

The present invention relates to a lubrication device (1) triple circuit of a mechanical system (3), said lubricating device (1) being provided with two lubricating circuits (10,20) independent of a tank (2 ) common to the two lubricating circuits (10,20) and containing a lubricating liquid and a tertiary circuit (30) in which circulates a liquid tertiary. Each lubricating circuit (10,20) comprises tubing, a pressure sensor (12,22), a pump (11,21), a heat exchanger (13,23), the nozzles (14,24) and a point suction (16,26) of said lubricating liquid in said reservoir (2). A second suction point (26) is located below a first suction high point (16). Said tertiary circuit (30) comprises a third pump (31), a third pressure sensor (32), said second heat exchanger (23) and a third heat exchanger (33). and thus allows to cool the lubricating fluid flowing into said second lubrication circuit (20).