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1、CHAPTER 77 Engine Indicating 77 章 发动机指示Text 1 INTRODUCTION正文 1 介绍The engine indicating system continuously supplies engine data to the common display system (CDS). The engine indicating system has these subsystems:发动机指示系统连续将发动机数据传至通用显示系统(CDS).发动 机指示系统具有以下子系统:- Low pressure rotor tachometer (N1) 低压转子
2、转速表(N1)- High pressure rotor tachometer (N2) 高压转子转速表(N2)- Exhaust gas temperature (EGT) 发动机排气温度(EGT)- Airborne vibration monitoring (AVM). 机载振动监控(AVM)The CDS usually shows engine data on two display units (DUs). One DU shows the primary engine display and the other shows the secondary engine display
3、. The primary engine display usually shows on the upper center DU. The secondary engine display usually shows on the lower center DU. Engine data can also show on the inboard DUs.CDS通常在两个显示组件(DU)上显示 发动机数据.一个DU显示在主发动机显示上,另外一个在次发动机显示上.主发动 机显示通常在上侧中央DU.次发动机显示通常在下侧中央DU.发动机数据也可以 显示在内测DU上.Text 2 Related C
4、omponents 正文 2 相关部件The engine indicating system shows these parameters for each engine:发动 机指示系统显示每个发动机的以下参数:- Low pressure rotor speed (N1)低压转子转速(N1)- High pressure rotor speed (N2)高压转子转速(N2)- Exhaust gas temperature (EGT) 排气温度(EGT)- Engine vibration. 发动机振动Electronic Engine Control 发动机电子控制发动机电子控制The
5、 electronic engine control (EEC) receives an analog input from these engine sensors:发动机电子控制(EEC)从以下发动机传感器接收模拟输入:- N1 speed sensor N1转速传感器- N2 speed sensor N2转速传感器- EGT probes (T49.5). EGT探头(T49.5)The EEC changes the analog signals to digital signals. The EEC sends the digital signals on an ARINC 429
6、 data bus to the display electronics units (DEU)s.EEC将模拟信号转换为数字信号.EEC将信号从ARINC429数据汇流条 至电子显示组件(DEU).Airborne Vibration Monitoring Signal Conditioner 机载振动监控信号调节机载振动监控信号调节 器器The airborne vibration monitoring (AVM) signal conditioner calculates and monitors vibration levels of each engine.机载振动监控(AVM)信号
7、调节器计算 和监控每个发动机的振动水平.The AVM signal conditioner receives analog input from these engine sensors: AVM信号调节器从以下发动机传感器接收模拟输入:- N1 speed sensor N1转速传感器- N2 speed sensor N2转速传感器- Number 1 bearing vibration sensor 1号轴承振动传感器- Fan frame compressor case vertical vibration (FFCCV) sensor.风扇结构 压气机机匣垂面(FFCCV)振动传感
8、器The DEUs and the flight data acquisition unit (FDAU) receive AVM information through an ARINC 429 data bus.DEU和飞行数据采集组件从通过 ARINC429数据汇流条接收AVM信息DEUs DEUThe DEUs use digital input from the EEC to show these engine parameters on the common display system (CDS):DEU利用来自EEC的信号输 入来在通用显示系统(CDS)上显示以下发动机参数:-
9、 N1- N2- EGT.The DEUs use their analog N1 and N2 signals as alternate inputs when the EEC does not have electrical power. EGT shows only when the EEC has electrical power.DEU在EEC未通电时使用模拟的N1和N2信号作为备份输入. EGT只有在发动机通电时才能显示.Text 3 ENGINE TACHOMETER SYSTEM正文 3 发动机转速计系统The engine tachometer system supplies
10、 the engine low pressure rotor (N1) and the engine high pressure rotor (N2) speed signals to these components: 发动机转速计系统将发动机低压转速和发动机高压转速信号送入以下部件:- Electronic engine control (EEC)发动机电子控制(EEC)- Display electronics units (DEUs) 电子显示组件(DEUs)- Engine airborne vibration monitoring (AVM) signal conditioner.
11、发动机机 载振动监控(AVM)信号调节器General Description概述概述The EEC receives two analog signals from each speed sensor. The EEC changes these analog signals to digital signals.EEC从每个转速传感器接收模 拟信号,EEC将这些模拟信号转换为数字信号The EEC uses the two signals for channel A and channel B operation. Each channel sends data to each DEU o
12、n an ARINC 429 data bus.EEC使用 这两个信号以进行A,B通道操作.每个通道将数据送入ARINC 429数据汇流条上 的每个DEU.Usually, the DEUs use input from the EEC to show N1 and N2 on the common display system (CDS). The DEUs can also use input directly from the speed sensors to show N1 and N2.DEU通常使用来自EEC的输入来在 CDS上显示N1和N2。DEU也可直接利用来自于转速传感器的输
13、入显示N1和N2.The AVM signal conditioner receives an analog input from the speed sensors to help calculate vibration levels. AVM信号调节器从转速传感器接收 模拟输入以帮助计算振动水平.Text 4 EGT INDICATING SYSTEM正文 4 EGT 指示系统The exhaust gas temperature (EGT) indication system monitors the exhaust gas temperature at the second stage
14、 low pressure turbine nozzles.排 气温度(EGT)指示系统监控第二级低压涡轮喷口的排气温度.The EGT system has eight thermocouples and four T49.5 thermocouple harness assemblies. Each wire harness assembly has two thermocouples and supplies input to the electronic engine control (EEC).EGT系统有8个热电 偶和4个热电偶线束装置.每个导线线束装置有两个热电偶,将输入送入EE
15、C.The EEC uses EGT signals for these functions:EEC使用EGT实现以下功能:- Show EGT on the common display system (CDS)在CDS上显示EGT- Engine hot start and wet start (no ignition) logic 发动机热起动和湿起动 逻辑电路- Low pressure turbine (LPT) cooling logic. 低压涡轮(LPT)冷却逻辑电路The EEC sends the EGT data to the display electronics un
16、its (DEU)s on an ARINC 429 bus. EEC将EGT数据送入ARINC429汇流条上的DEU.The DEUs are part of the CDS. The DEUs usually show EGT on the upper center display unit. EGT can also show on the lower center and inboard display units.DEU是CDS的一部分.DEU通常在上侧中央显示组件上显示 EGT.EGT也可以在下侧中央和内测显示组件上显示.Text 5 AVM SYSTEM 正文 5 AVM 系统The airborne vibration monitoring (AVM) system continuously supplies engine vibration levels to the CDS.机载振动监控(AVM)系统持续的将发动机振 动水平供应至CDSThe
