Gas turbine major overhaul

The rotors of rotating machinery, including gas turbine units, are extremely sensitive to misalignment. Regular maintenance and laser alignment during commissioning significantly reduce the cost of regular engineering maintenance in the long term.

To access the compressor rotor, compressor blades and bearing assemblies, the GTU housings must be removed. However, before their removal, the GTU structure must be properly supported with mechanical jacks to avoid twisting the housing.

A comprehensive inspection of the hot gas duct with replacement of all necessary components, such as work blades, nozzle assemblies, elements of the combustion chamber and fuel system, is included in a capital repair scope.

During a comprehensive inspection of the compressor, the inlet assembly is checked for erosion, corrosion and mechanical damage. The rotor is also checked for cracks and other damage, and the bearing bushings are checked for wear.