关于TRF数据为0的问题

加菲猫。 · 发表于 2020-10-5 08:19:24

译码右发N1振动值短时偏大，检查当前ENG 2振动探测源为BEAR 1，TRF探测数据都为0，EVMU测试无代码，检查TRF传感器，插头线路测量都正常，后面到其他正常的飞机上发现，也会有同样情况（探测源为BEAR 1，TRF数据为0），问下各位大佬这种情况是正常的吗？

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czx丶opepy · 发表于 2020-10-8 09:23:57

VIBRATION PARAMETERS DESCRIPTION
The No. 1 bearing sensor is formed by an accelerometer located at 9:00 o'clock position on No. 1 and No .2 bearing support and a sensor cable that is routed through the fan frame. The No. 1 bearing vibration sensor permanently monitors the vibrations from No. 1 bearing and the vibrations from LPT and High Pressure Turbine (HPT) shafts. It's also used to the fan trim balance procedure.
The Turbine Rear Frame (TRF) vibration sensor is installed at 12 o'clock on the front flange of the TRF. The TRF vibration sensor is used as back-up of N1 bearing accelerometer to monitor and, if necessary, reduce the engine vibration level using the trim balance procedure.
The aircraft EVMU uses the vibration and the rotational speed signals to extract all the vibration signals and compute the position and the amplitude of the unbalanced signals.
As normal vibration is depending on rotor speed, for each speed, the EVMU processes the ratio actual value/maxi value. This ratio is multiplied by 10 and is available on the EVMU output for display on ECAM SD.
会不会是因为TRF是作为备份的原因？

加菲猫。 · 发表于 2020-10-9 17:11:26

czx丶opepy 发表于 2020-10-08 09:23
VIBRATION PARAMETERS DESCRIPTION
The No. 1 bearing sensor is formed by an accelerometer located at 9:00 o'clock position on No. 1 and No .2 bearing support and a sensor cable that is routed through the fan frame. The No. 1 bearing vibration sensor permanently monitors the vibrations from No. 1 bearing and the vibrations from LPT and High Pressure Turbine (HPT) shafts. It's also used to the fan trim balance procedure.
The Turbine Rear Frame (TRF) vibration sensor is installed at 12 o'clock on the front flange of the TRF. The TRF vibration sensor is used as back-up of N1 bearing accelerometer to monitor and, if necessary, reduce the engine vibration level using the trim balance procedure.
The aircraft EVMU uses the vibration and the rotational speed signals to extract all the vibration signals and compute the position and the amplitude of the unbalanced signals.
As normal vibration is depending on rotor speed, for each speed, the EVMU processes the ratio actual value/maxi value. This ratio is multiplied by 10 and is available on the EVMU output for display on ECAM SD.
会不会是因为TRF是作为备份的原因？

去了其他飞机看，同一架飞机，双发探测源都是BEAR 1，但是左发TRF有数据，右发就全是0

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加菲猫。 · 发表于 2020-10-9 17:11:32

谈恋爱吗发表于 2020-10-05 16:05
-5b？

是的

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大浪淘沙 · 发表于 2020-10-9 22:45:40

肯定不正常！TRF作为备用只是不使用他的数据，不代表没有数据

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siweilinux · 发表于 2020-12-4 16:37:12

一般是插头虚接，清洁润滑

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[70-80 CFM56] 关于TRF数据为0的问题

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