330关于热汇流条给发动机燃油低压活门供电的疑问

yoyonj · 发表于 2012-11-1 23:28:50

330手册中提到，在飞机断电后，由于热汇流条能给低压活门供电，能使低压活门在断电后保持打开，
我的疑问是：在飞机断电后，如果热汇流条一直给低压活门马达通电，那电量不是迟早会耗尽，请高手指点，帮忙看看哪里理解错了，谢谢

Gmao · 发表于 2012-11-2 09:55:59

你是不是看错了两个马达虽然供电不一样但操作和原理是一样的应该是互为失效保障的
Each actuator
has two motors, which get their power supply from different sources:
- the 28 VDC ESS bus supplies motor 1,
- the 28 VDC bus 2 supplies motor 2.
The engine LP fuel shut-off system is controlled manually.
When the ENG 1 FIRE P/BSW is in and guarded, the ENG 1
MASTER switch selection to ON disconnect the 28VDC supply from
the master switch slave ENG 1 relay. The relay de-energizes and
connects a 28 VDC supply (through the ENG 1 FIRE P/BSW) to the
LP valve actuator. The actuator then opens the LP valve.
When the No. 1 ENG MASTER switch is set to OFF, it connects a
28 VDC supply to the relay. The relay energizes and connects a 28
VDC supply through the ENG 1 FIRE P/BSW to the LP valve actuator.
The actuator then closes the LP valve. The ENG 1 FIRE P/BSW
position, master switch slave ENG 1 relay and engine 1 LP valve
actuator positions are sent to the FCMCs for indication on the ECAM
FUEL page and for LP system fault reporting.

pzc07 · 发表于 2012-11-7 15:28:11

咋这多英文。。

mengzf213 · 发表于 2012-12-11 09:26:58

我这么理解的：当飞机有电，ENG主电门在OFF位时，28V DC ESS BUS给MASTER SWITCH SLAVE RELAY ENG1供电，继电器吸合，使LP VALVE保持在关位；此时若飞机失电，MASTER SWITCH SLAVE RELAY ENG1没电，吸合电路断开，28V DC BUS2或者28V DC HOT BUS1给马达供电，使活门打开。

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[A330] 330关于热汇流条给发动机燃油低压活门供电的疑问

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