液壓 B系統(tǒng)提供小于 3000PSI的壓力給飛行控制、起落架及反推裝置
系統(tǒng)。液壓 B系統(tǒng)為下列系統(tǒng)提供壓力：主輪剎車右反推裝置
副翼—動力控制組件及自動駕駛作動筒
升降舵—動力控制組件及自動駕駛作動筒
升降舵 FEEL
方向舵
外側飛行擾流板 2#和 7#
后緣襟翼
前緣襟翼和縫翼
備用起落架收起
備用前輪轉彎
(6) System Bhydraulic pressoure is provided by two hydraulic pumps, an EDP(engine driven pump) and an EMDP(electric motor driven pump).the pumps are supplied with fluid from a reservoir pressurized with pneumatic air from the ECS(environmental control system). Output of the pumps is routed to a pressure module and from there to the using systems. Return fluid from the using system is routed through a return filter module then to the reservoir. Drain fluid from both pumps is routed through a heat exchanger before going to the reservoir.

B系統(tǒng)壓力油兩個液壓泵、一個發(fā)動機驅(qū)動泵和一個電動馬達泵來提供。泵內(nèi)裝有從油箱來的液體，用環(huán)境控制系統(tǒng)的增壓空氣產(chǎn)生壓力。泵內(nèi)輸出的壓力被送往壓力組件并從這兒傳給用戶系統(tǒng)。從用戶系統(tǒng)返回的流體通過一個回油濾組件被送往油箱。泵中排出的流體通過一個熱交換器后被送往油箱。

(7) The standby system components are located in the main gear wheel well,on the keel beam and the aft bulkhead. The standby pump is operated when required to power the rudder, thrust reversers, or to extend the leading edge devices. The pump can be turned on by either of three guarded switches on the forward overhead panel(P5). In addition, the pump automatically switches on and provides standby pressure to the rudder whenever hydraulic system A or Bis lost, the flaps are not up, the

airplane is either in the air or on the ground with wheel speed above 60 knots, and at least one flight control switch, system A or B, is ON.
備用系統(tǒng)組件位于主輪艙，壓力隔板后方龍骨上方。當需要操作方向舵、反推裝置或打開前緣設備時，備用泵開始工作。這個泵能夠被頭頂（ P5）面板前方的三個帶保護罩的開關中的任一個打開。另外，無論 A系統(tǒng)或 B系統(tǒng)哪一個失效時，這個泵將自動工作并為方向舵提供備用壓力，襟翼不會打開，飛機無論在空中或地面輪速都將大于 60節(jié)，并且至少有一個飛行控制開關， A系統(tǒng)或 B系統(tǒng)是打開的。
(8) When the standby pump is turned on, pressurized fluid is delivered to two motor-operated shutoff valves on the standby pressure module and to two thrust reverser shuttlee valves. The motor operated shutoff valves which control pressure to the leading edge devices and to the standby rudder actrator are individually controlled by switches on the forward overhead panel. The standby rudder shutoff valve is also opened when the standby hydraulic pump is automatically turned on.
當備用泵打開時，壓力被送往備用壓力組件的兩個馬達控制的截流閥和兩個反推裝置截流閥上。馬達控制截流閥控制提供給前緣設備的壓力并通過前頂置面板分別控制備用方向舵作動筒。當備用液壓泵自動工作時，備用方向舵截流閥也同時打開。
LESSON 14 LANDING GEAR起落架
一、單詞二、TEXT
主起落架  Main gear 前起落架  Nose gear 梁  Spar
防滑的  Antiskid 無效的  Inoperative 自動剎車  Autobrake