Engine vibration indication, Other Engineering

Engine Vibration Indication

The engine vibration monitoring (EVM) system shows the out of balance force for the N1 and N2 shaft.

High engine vibration shows engine damage or other deviations in the engine. Vibration also reduces the comfort level in the aft passenger compartment.

Engine Vibration Monitoring System

The EVM system shows vibration in inches/second (IPS) An amber limit shows the maximum vibration level.

The EVM system has:
• a dual engine vibration transducer on each engine
• an engine vibration signal conditioner
• a pushswitch on the overhead panel.

The vibration transducer has two internal vibration pick-ups, a pick-up A and B. each pick-up gives a voltage proportional to the acceleration or deceleration of the vibration.

The vibration transducer is on the IP compressor casing. This casing is the housing for bearings of the HP and LP shaft.

The engine vibration signal conditioner is a single unit for both engines. It processes the output of the engine vibration transducers for indication. The engine vibration signal conditioner gives two modes of vibration indication, tracked and broadband.

Tracked Indication

The tracked mode shows vibration of the N1 and N2 shaft. The engine vibration signal conditioner tunes two filters with an input of the N1 and N2 RPM indicator generators. Both filters connect to one pick-up of the vibration transducer, the other is standby. The VIB pushswitch on the ENGINE panel controls the active pick-up of the vibration transducer.

Broadband Indication

The broadband mode is an alternative mode. Vibration of the total power plant is shown. In this mode the output of both pick-ups in the vibration transducer goes through broadband filters. A semi-guarded switch selects the tracked or broadband mode.


Inte

1031_Engine Vibration Indication.png

Posted Date: 9/12/2012 9:15:19 AM | Location : United States







Related Discussions:- Engine vibration indication, Assignment Help, Ask Question on Engine vibration indication, Get Answer, Expert's Help, Engine vibration indication Discussions

Write discussion on Engine vibration indication
Your posts are moderated
Related Questions
Gas turbine fuel properties and specification In the earliest days of the gas turbine engine, kerosene was regarded as the most suitable fuel. It commended itself on the grounds

a circular roller of radius 10cm and of weight 1.8kn rest on a smooth horizontal surface

Explain the following observations: cells of Escherichia coli fermenting glucose grow faster when NO3 - is supplied to the culture and then grow even faster when the culture is hig

Transfer Function Models Corresponding to each linear state space equation in the time domain with input u(t) and output y(t) is a matrix of transfer functions relating the Lap

Equivalent Shaft Horsepower (EHP) In practice there is always a certain amount of jet thrust in the total output of the turbo-propeller engine and this must be added to the s.h

What is the difference between real money & nominal money?  Moderate cash is relevant to the evaluate of keeping track of. nominal figure is what is published on the expenses. w

Primed stability derivatives The rolling and yawing motions are coupled through the cross inertia I XZ due to rotation not being about the principal axes. Since in general air

Why would an investor buy preferred stock? A buyer that wants the benefit potential of value but wants to reduce possibility would buy recommended inventory. The buyer would rec

Noise reduction The problem of engine noise has always been associated with aircraft. Increases in engine power have given rise to increases in noise and the indications are t

determine forces in each member of equilqteral truss