LUBRICATING INSTALLATION FOR ROCKING POWER TRANSMISSION BOX

摘要

The invention concerns an installation comprising at least a pressurized lubricating circuit (37a, 37b) for elements housed in the rocking crankcase (23), each circuit including a radial transfer bearing (47a, 47b) between two opposite cylindrical journals coaxial about the rocking axis (B-B), one fixed journal on a fixed part (31) and one pivoting journal on a pivoting part integral with the pivoting crankcase (23), each transfer bearing comprising two U-shaped annular gaskets facing each other and spaced apart along the rocking axis (B-B) so as to define between them an annular pressurized liquid lubricant chamber, said annular chamber being supplied with pressurized liquid lubricant by at least a supply duct (46a, 46b) integrated in the fixed part (31) and whereof the upstream part is connected to a pressurized lubricant source (34a, 34b), and feeds the rocking crankcase (23) with pressurized lubricant through a dispensing duct (48a, 48b) emerging into the rocking crankcase (23). The invention is useful for lubricating rocking power transmission boxes for convertible aircraft tilt rotors.