The saving of a mechanical assembly multiplier / reducing agent, in particular of the 'transmission box' helicopter, in the event of loss of lubricating oil.

摘要

The invention relates to a backup system of a mechanical assembly multiplier / reducer, in particular of the box " type of transmission of a helicopter, in the event of loss of lubricating oil, which comprises an additional system for cooling the chamber of the mechanical assembly, with an inlet (1) and an output (2) arranged on the casing (3) of this mechanical assembly. The inlet (1) and the output (2) are closed during normal operation, and they open under the action of a control device to a predetermined value of a parameter representative of the loss of lubricating oil, this control device which then simultaneously as a function of the additional system for cooling, so that the cooling agent, which is being loaded in the heat resulting from the heating caused by loss of the lubricating oil, can be discharged to the outside by the output (2) of the additional system for cooling, which is of the type with a flow of air. & br / main application: helicopters.