Steam Turbines
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Steam turbines consist of an outer pressure casing and central shaft with a rotor or several rotors, depending on the number of stages of the turbine, arranged along it's length. These rotors are fitted with blades on which the steam impinges, converting the steam energy into a rotating movement.
A turbine normally consists of two stages, the first where the high pressure steam is expanded and used to drive the turbine and the second where the lower pressure steam is used again, ensuring that most of the latent energy of the steam is utilised. The main use of steam turbines is in the generation of electricity.
Note :- Periodic examinations should concentrate on noise, vibrations and/or leakage to give early indication of potential failure as well as checking operating records to ensure correct start-up and shut down procedures.
Appropriate Legislation - PUWER - EAWR |
