Method of installation of large capacity gas-turbine powered electrical generating machinery

A method of installing in a machinery hall a gas turbine apparatus for coupling mechanically to an electric power generator, the gas turbine comprising a power turbine unit whose output shaft is coupled to the input shaft of the generator and also comprising as a separate unit a gas generator unit which is to be connected to the power turbine with a gas-tight fitting by means of respective cooperating flanges and also with a protruding axial shaft on the gas generator which mates with a bearing in the power turbine unit, said method comprising the steps of:

• fixedly installing on supporting means in the machinery hall the power turbine unit and coupling said power turbine unit to the generator with the said bearing of said power turbine unit being oriented horizontally for coaxial alignment with said shaft of said gas generator,
• transporting the gas generator into the machinery hall and to the site of its assembly with the power turbine unit by rolling the gas generator horizontally on a plurality of roller means and with its entire weight supported in static equilibrium on the roller means,
• lifting one end of the gas generator slightly so as to permit the removal from thereunder of sufficient of the roller means to ensure that the roller means remaining do not provide static equilibrium of the gas generator,
• concurrently with the lifting step, supporting a portion of the weight of the gas generator from an overhead travelling crane which is attached to the gas generator at a point to provide, in cooperation with said remaining roller means, static equilibrium support of the gas generator,
• and repeatedly adjusting the height of said roller means and also the extent of lift provided by the travelling crane while concurrently moving said gas generator horizontally to bring the cooperating flanges on the gas generator and power turbine unit into abutting relationship with each other while said shaft concurrently is coaxially aligned with said bearing.