mATRatze
Guest
Nö,die EHAs hängen auch am Netz,deshalb ist der Wegfall von diversen Leitungen für mich nicht richtig.
Load limiting relief valves prevent that EHA internal pressure
increases over 5800 PSI (400 bar). In this case, the over pressurized
hydraulic fluid is evacuated through the LP maintaining and LP
non-return valves to the general aircraft hydraulic system
Connected to the aircraft 5080-PSI (350 bar) HP hydraulic system
through the HP port, the commanded fluid-filling device includes a
solenoid valve, called filling solenoid valve, an HP filter and a filling
non-return valve. According to the accumulator pressure and
temperature, reflecting the accumulator level, the electronic module
controls the opening of the filling solenoid valve via flight control
computer when the aircraft is on ground and hydraulic system is
available. The complete filling is achieved around 20 seconds.
In case of maintenance operation, a bleeding device opens manually
the LP maintaining valve and depressurizes the unit through the LP
non-return valve.
To summarize, the EHA filling is automatic when the bleeding is a
manual operation.
Load limiting relief valves prevent that EHA internal pressure
increases over 5800 PSI (400 bar). In this case, the over pressurized
hydraulic fluid is evacuated through the LP maintaining and LP
non-return valves to the general aircraft hydraulic system
Connected to the aircraft 5080-PSI (350 bar) HP hydraulic system
through the HP port, the commanded fluid-filling device includes a
solenoid valve, called filling solenoid valve, an HP filter and a filling
non-return valve. According to the accumulator pressure and
temperature, reflecting the accumulator level, the electronic module
controls the opening of the filling solenoid valve via flight control
computer when the aircraft is on ground and hydraulic system is
available. The complete filling is achieved around 20 seconds.
In case of maintenance operation, a bleeding device opens manually
the LP maintaining valve and depressurizes the unit through the LP
non-return valve.
To summarize, the EHA filling is automatic when the bleeding is a
manual operation.