曝光台 注意防骗
网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者
(2) The engine starter is a single-stage, axial flow, turbine-air motor, the
starter converts compressed air pressure into rotational mechanical energy
sufficient to accelerate the engine to starting speed. Pressurized air and
electrical power are required for starter operation. The engine may be
started with air from the APU(we will introduce APU in the next lesson),
from a ground source, or by using engine crossbleed. Another important
system related to engine operation is the ignition system. The purpose of
the ignition system is to produce a high current electrical spark to ignite
the fuel /air mixture in the engine combustion chamber during starting and
to provide continuons ignition during takeoff, landing and operation in
adverse weather conditions. The ignition system consists of the ignition
power supply, engine ignition control, 2 ignition exciters, 2 spark igniters
and 2 triaxial shielded ignition leads.
发动机起动器是一个单级、轴流式空气涡轮发动机，起动器将压缩空
气的压力转换为足够的转动机械能以加速发动机的转速。起动操作时
需要增压空气及电源。发动机可以用APU 来的引气、地面气源或发
动机交输引气起动（我们将在下一课介绍APU）。另一个与发动机起
动有关的重要系统是点火系统。点火系统的作用是在起动过程中产生
高压电火花点燃发动机燃烧室中的燃油/空气的混合气，并在起飞、降
落阶段及恶劣天气下提供持续的点火。点火系统包括点火电源、发动
机点火控制、2 个点火励磁器、2 个火花点火器及2 个三相点火屏蔽
线。
(3) Bleed air is extracted from the high pressure compressor for the following
system:
Air-conditioning
Cabin pressurizatin
Wing and engine inlet cowl anti-icing
Hydraulic tank pressurization
Potable water tank pressurization
Fan air is used as cooling air for the precooler to limit the temperature of the
bleed air in the pneumatic manifold. Fan air is also used for cooling the
generator and thrust reverser.
引气从高压压气机中释放给列镣系统：
空调系统
客舱增压系统
机翼及发动机入口整流罩防冰
液压油箱增压
饮用水箱增压
风扇空气做为预冷器中的冷却空气用以限制增压总管中的引气温度。风
扇空气也可用于冷却发电机和反推装置。
(4) The thrust reverser system reversers the direction of the fan exhaust during
landing and provides additional brakeing of the airplane. The reverser
sleeve is part of the engine cowling . the actuating system is on the
reverser. The control and indicatin system are located remote from the
engine. The reverser can only be deployed on the ground with hydraulic
pressure available. Prior to deployment the engine thrust lever must be at
idle position.
In figure17-1,10blocker doors are arranged around the forward section of
the thrust reverser sleeve. The forward section of the blocker door is
attached to the sleeve with two bolts, the blocker door drag link attaches
the blocker door to the inner duct. The ddrag link attaches to the blocker
door with a link attachment fittin and to the inner duct with a bolt. As the
sleeve translate aft, the blocker doors rotate into a blocking position, due
to sleeve movement and the door’s attachment to the inner duct.When
extended, the blocker doors block the fan exhaust, forcing air in the
reverse direction through the cascade segments.When retracted, the doors
form part of the outer duct for fan exhaust air.
反推装置系统将降落阶段风扇排放的气流反向并辅助飞机刹车。反推
器的外壳是发动机整流罩的要部分。作动系统在反推器上。控制及指
示系统从发动机遥控。反推器只能够在地面液压系统有效时打开。在
打开之前，发动机反推装置必须是在慢车位。
在图17-1 里，10 个阻流门围绕着反推装置外壳前部排列。阻流门前
段用两个螺栓与外壳相连，阻流门阻力连杆将阻流门连接在内部管道
上。阻力连杆用一个连接装置连接到阻流门并用一个螺栓连接到内部
管道上。当外壳移动后部，阻流门转到阻流位，由于外壳转动，并且
门连接在内部管道。当扩展时，阻流门阻止风扇排气，迫使空气反向
通过级联段。当收回时，阻流门将作为风扇向外排气的外部管道的一
部份。
(5) The engine and hydraulic parameters are displayed on two engine
instrument panel(ELS)using light emitting diodes(LED).
Engine displays and controls on the center panel consist of the following :
·N1 displays—— indicate fan speed in percent rpm.
·N2 displays —indicate high pressure compressor speed in percent rpm .
·Exhaust gas temperature(EGT)displays
1. indicate temperature of exhaust gas in °C.
2. a red light above each N1,N2,and EGT display illuminates if that engine
exceed its redline.
·Fuel flow displays
Indicate fuel flow in weight of fuel per hour and also total fuel consumed per
engine.
The FUEL FLOW/FUEL USED switch is used to change display from FUEL
FLOWto FUEL USED, after 10 seconds the FUEL USED display reverts to
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：
航空工程英语基础（中英文对照）(96)
