Vibration monitoring of Gas Turbine in oil industry Essay

Vibration monitoring of Gas Turbine in oil industry - Essay Example Mostly it is used in turbo machinery when in support of fluid film bearings. ii. The Velocity-pickup detectors: It is characterized with a flat response to amplitude which is given as a function of frequency. As a result the alarm setting will remains same as before despite different speeds of the turbine. Their role in the turbines diagnosis is however limited. This pickup detector tends to be very directional providing different result values when subjected to the same force but placed facing in different directions. iii. Accelerometers: This is usually in many cases mounted on the machine’s casing. Their main work is to pick up vibrations problems from the spectrum transmitted between the shaft and the casing. They are used in identification of high frequency response problems which can arise due to, dry fictional whirl, wearing of gear teeth, blade flutter and surge. The industrial gas turbines in oil industries are built and intended for industrial applications as exhibited in their design features. Gas turbine in oil industry utilizes the fluid-film in bearings in both their and axial and radial shaft support. They use seal oil auxiliary systems and conventional lube oil, and also they are used in heavier construction, due to their heavy weight driven components. (Kamboukos et al.2005). Some Gas Turbine Condition Monitoring and Protection System that can be used are: i. Radial Bearings: When two proximity probes are used then they should be placed in a configuration that of X-Y in each of the bearing and observe directly their relative motion from the bearing and the shaft. This has been recommended to be used like a shutdown parameter. ii. Thrust Bearings: Only two proximity probes are used, observation of the axial position in the shaft being at within thrust bearing area of clearance. It is also has been recommended to be used as shutdown parameter. (Loboda et al. 2006). iii. Casing Vibration: The