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fuel/oil heat exchanger to a filter. Provisions are made to bypass the filter
in the event of failure or blockage. The second stage of the fuel pump
provides high pressure fuel to the main engine control(MEC). As the fuel
leaves the second stage fuel pump, it passes through another filter where a
portion of the fuel is ported to a servo fuel heater before entering the MEC.
The servo fuel heater uses engine oil to heat the servo fuel to prevent icing
of control mechanisms control(PMC) uses power lever angle, fan inlet
pressure and temperature, N1 rpm and N2 rpm to meter the correct
amount of fuel to the combustor. A fuel-flow transmitter measures the rate
of fuel flow from the MEC and provide a signal to the fuel flow indicator.
燃油從第一級發(fā)動機驅動燃油泵中通過燃油/滑油熱交換器到一個油
濾。當油濾萬一失效或堵塞時將被旁通。燃油泵的第二級提供高壓燃
油給主發(fā)動機控制器。當燃油離開燃油泵第二級,流到另一個油濾，在
那里，一部份燃油在進入主發(fā)動機控制器前前轉到一個伺服燃油加熱
器。這個伺服燃油加熱器用發(fā)動機滑油加熱伺服燃油以防止控制機械
內部主發(fā)動機控制器結冰。主發(fā)動機控制器與電源管理控制器相連，
用動力桿角度、風扇入口壓力及溫度、N1 轉速和N2 轉速來測量燃燒
室燃油量。燃油流量傳感器從主發(fā)動機控制器測量燃油流率并為燃油
流量指示器提供信號。
(7) The oil system is pressurized by the engine driven oil pump. The oil
leaves the oil pump, where sensors for oil pressure and the LOWOIL
PRESSURE switch are located, passes through an oil filter and continues
to the engine bearing and gearbox, the oil is returned to the oil tank by
means of engine driven scavenge pump. From the scavenge pumps the oil
passes through a scavenge filter. Bypass valve is mounted to prevent filter
from blocking. scavenge oil temperature is sensed as the oil returns to the
scavenge pump. The oil then passes through the servo fuel heater and
fuel/oil heat exchanger where it is cooled by fuel before returning to the
oil tank.
滑油系統(tǒng)通過發(fā)動機驅動的滑油泵增壓。滑油離開裝有滑油壓力傳感
器及“LOW OIL PRESSURE”開關的滑油泵，流向一個滑油油濾并
流到發(fā)動機軸承及齒輪箱。滑油通過發(fā)動機驅動的回油泵回到滑油
箱。從回油泵返回的滑油流經一個油濾，旁通活門用來防止油濾堵塞。
當滑油回到回油泵時，通過一個傳感器來感受回油滑油溫度，然后，
滑油通過伺服燃油加熱器及燃油/滑油熱交換器，在這，滑油在回到
滑油箱之前被燃油冷卻。
LESSON 17 PPOWER PLANT （2）
一、單詞
起動Start 點火Ignition 扭矩Torque
轉動Rotate 加速Accelerate 慢車Idle
起動器Starter 一套電路Circuitry 高壓壓氣機High pressure
compressor
外殼Case 位置Position 完成Accomplish
級Stage 空氣渦流發(fā)動機Turbine-air
motor
把…轉換Convert into
能量Energy 足夠的Sufficient 地面源Ground source
交叉引氣Crossbleed 另一個Another 與…有關Related to
火花Spark 混合物Mixture 起飛Take off
著落Landing 有害的Adverse 天氣Weather
情況Condition 要求Require 點火Ignite
勵磁器Exciter 三維的triaxial 屏蔽Shield
引線lead 入口整流罩Inlet cowl 預冷器Percooler
限制Limit 溫度Temperature 總管道m(xù)anifold
相反revers 方向Director 套筒sleeve
遙控器Remote 展開Deploy 在…之前Prior to
展開Deployment 阻流門Blocker
door
排列Arrange
連接在…上Is attached to 螺栓Bolt 阻力連桿Drag link
裝置Fitting 移動Translate 強迫Forcing
級聯(lián)的Cascade 部分、段Segment 形成Form
參數(shù)Parameter 儀表Instrument 發(fā)光二極管Light emitting
diode
百分比Percent 排氣溫度Exhaust gas
temperature
超出Exceed
紅線Redline 重量Weight 總的Total
消耗Consume 順序Sequence 復位Reset
振動Vibration 最大的maximum
二、TEXT
(1) the engine starting system provides air, fuel, ignition and torque for
rotating the engine to an rpm at which the engine can accelerate to idle
rpm. The system consists of the starters, start valves, start bleed valves,
pneumatic ducting, control and power circuitry, start levers and start
selector switches. The start valve and starter are located on the forward
side of the engine accessory gearbox, the start bleed valve is located on the
left side of the HPC case at the 11 o’clock position, the start levers, start
selector switches and start valve open light are in the flight compartment.
Engine starting is accomplished by supplying air from the pneumatic
system through the start valve to the starter.
發(fā)動機起動系統(tǒng)提供引氣、燃油、點火及扭矩，以使發(fā)動機轉動并加
速到慢車所需的轉速。系統(tǒng)包括起動器、起動活門、起動引起活門、
增壓管道、控制及電源線路，起動手柄及起動選擇開關。起動活門及
起動器安裝于發(fā)動機附件齒輪箱，起動引氣活門安裝于高壓壓氣機左
側11 點鐘位置，起動手柄、起動選擇開關及起動活門打開指示燈位
于駕駛艙。發(fā)動機起動過程通過發(fā)動機增壓系統(tǒng)提供空氣經過起動活
門給起動器來完成。
　
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