AIRCRAFT HYDRAULIC SYSTEM Russian patent published in 2012 - IPC B64C13/36 

FIELD: transport.

SUBSTANCE: invention relates to aircraft engineering. Hydraulic system comprises three subsystems of hydraulic supply communicated with hydrosupply consumer power drives. Besides, hydraulic system is furnished with extra hydraulic power source. Every said subsystem includes hydraulic tank, suction and delivery lines, main and standby sources and hydropneumatic accumulator. Hydraulic tank comprises shell made up of two aligned different-diameter cylinders. Every said cylinder houses pistons articulated by rods dividing them into chambers. Note here that larger-diameter cylinder chamber houses hydraulic system working fluid. Hydropneumatic accumulator includes shell to house piston to divide it into two chambers. One of hydropneumatic accumulator chambers is filled with compressed gas and communicated with hydraulic tank smaller-diameter chamber. Another chamber of hydropneumatic accumulator is communicated with pressure line. Extra hydraulic power source comprises motor and pump fitted on common shaft. Pump inlet is communicated via extra suction line with hydraulic tank chamber while its outlet is communicated with extra pressure line of the first subsystem of hydraulic supply. Extra pressure line of third subsystem is communicated with extra source motor source via working fluid feed control valve.

EFFECT: higher reliability, reduced weight.

2 cl, 2 dwg