B - Operations – Transporting – 64 – C
Patent
B - Operations, Transporting
64
C
B64C 25/22 (2006.01) B64C 25/26 (2006.01)
Patent
CA 2606726
The invention relates to an architecture for a hydraulic system for operating the landing gear of an aircraft including at least one pressure source and at least one hydraulic return, the system having a hydraulic circuit comprising a first hydraulic line (DOWN) that, when pressurized, causes the landing gear to be lowered, and a second hydraulic line (UP) that, when pressurized, causes the landing gear to be raised, said lines being selectively pressurized by means of a hydraulic distribution member comprising at least an isolation valve and a selector for putting one of the lines into communication with pressure and the other line into communication with return. According to the invention, the architecture includes passive bypass means for bypassing the selector, said means being disposed between the second line (UP) and an admission line that extends between the isolation valve and the selector, and forced return connection means for forcing the isolation valve to isolate the pressure circuit of the aircraft and connect the admission line to return.
L'invention concerne une architecture de système hydraulique de manoeuvre des atterrisseurs d'un aéronef comportant au moins une source de pression et un retour hydraulique, avec un circuit hydraulique comportant une première ligne hydraulique ("DESCENTE") dont la pressuri-sation provoque la descente des atterrisseurs, et une deuxième ligne hydraulique ("RELEVAGE") dont la pressuri-sation provoque le relevage des atterrisseurs, ces lignes étant sélectivement pressurisées au moyen d'un organe de distribution hydraulique comportant au moins une vanne d'isolation et un sélecteur pour mettre en communication l'une des lignes avec la pression, et l'autre des lignes avec le retour. Selon l'invention, l'architecture com-porte des moyens de shunt passifs du sélecteur disposés entre la deuxième ligne ("RELEVAGE") et une ligne d'ad-mission qui s'étend entre la vanne d'isolation et le sé-lecteur, et des moyens de mise au retour forcée pour for-cer la vanne d'isolation à isoler le circuit de la pres-sion de l'aéronef et mettre la ligne d'admission au re-tour.
Felemez Eric
Fremiot Sebastien
Leutard David
Goudreau Gage Dubuc
Messier-Bugatti
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