Abstract
Gas turbines are engines an energy plant makes use of for generating the rotary motion to show power generators. The gas turbine is largely a combustion engine for changing natural gas or different liquid fuels to rotational mechanical energy. Often, the gas turbine generates excessive noise or vibrations. In this work, the problem of vibrations occurrence in the gas turbine model MS9001E used in the south Baghdad power station is solved. This is done by making a groove in the bearing pad to increase the oil flow, replacing the bearing type with a tilt-pad bearing type with damper. The finite element method was used in the analysis process by ANSYS program. The results showed a decrease in the values of vibration amplitude, total deformation, stress, and strain.
Highlights
The gas unit that is used in power plants consists of three main parts, which are the air compressor, the combustion chamber, and the turbine
This paper aims to make improvements to the gas turbine model MS9001E used in the South Baghdad Station to reduce vibrations
By comparing the results in both cases, the following was concluded: In the model analysis, the deformation value of the first mod at frequency (12 Hz) decreased to (0.0023 mm) after its value before development was (1.3134 mm), this will help reduce the stress on the system, when an excitation function interacts with the natural frequency of the structure
Summary
The gas unit that is used in power plants consists of three main parts, which are the air compressor, the combustion chamber, and the turbine. Kulvir studied Singh Higher burn temperatures can best be reached through using the progressed materials for components along with combustor, nozzles, buckets (rotating blades), turbine wheels and spacers These critical parts facing various operating conditions with reference to temperature, transient loads and environment. Surge and Stalls are two main kinds of instabilities that often occur in compressor systems that affect gas turbines This instability often results in excessive vibration due to pressure, and commands are given through this phenomenon [6]. This is done by collecting data obtained from the operation and control department of the station which show the values of vibrations in the gas turbine through the monitoring screen This model used in south Baghdad Power Plant station, this station can supply max power is about rotation speed 3000 r.p.m
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