Safeguard system of a speed increasing/reducing mechanical assembly, especially of the helicopter 'gear box' type, in case of lubricating oil loss

摘要

The invention relates to a safeguard system for speed increasing/reducing mechanical assembly, especially of the helicopter "gear box" type, in case of lubricating oil loss, which comprises an additional cooling system the casing of the said mechanical assembly, with an inlet (1) and an outlet (2) arranged on the casing (3) of this mechanical assembly. The inlet (1) and the outlet (2) closed during normal operation and they open under the effect of a control device at a preset value of a parameter significant for lubricating oil loss, whereby this control device actuates simultaneously the additional cooling system, in order to provide a circulation of the coolant between the inlet (1) and the outlet (2) so that this coolant, loaded with the calories further to the warm-up caused by the lubricating oil loss, may evacuate the said calories outside via the outlet (2) of the additional cooling system, which is of the air circulation type.