General Awareness in Steam Turbine Manufacturing

submitted by: Anuj yadav(0800140016)

MAIN PART OF STEAM TURBINE : BLADE ROTOR IP OUTER

CASING IPINNER CASING

TYPES OF ROTOR: H.P ROTOR I.P ROTOR

L.P ROTOR

H.P ROTOR: IT IS KNOWN AS AHIGH

PRESSURE ROTOR HIGH PRESSURE ROTOR HAVE LESS IN SIZE AND DIAMETER THE R.P.M OF THE HIGH PRESSURE ROTOR IS LESS IN COMPARISON TO OTHER ROTOR

I.P ROTOR:  INTERMEDIATE

PRESSURE ROTOR  IT HAVE MEDIATE SIZE AND DIAMETER OF H.P AND I.P ROTOR  R.P.M OF I.P IN BETWEEN OF H.P AN L.P ROTOR

L.P ROTOR:  LOW PRESSURE ROTOR  IT HAVE MUCH BIGGER

SIZE AND DIAMETER COMPARISON TO H.P AND I.P ROTOR  IT HAVE HIGH R.P.M TO OTHERS ROTOR

STEAM TURBINE BLADES

BLADING

WORKING PRINCIPLE OF STEAM TURBINE ROTATING BLADE ROW

FIXED BLADE ROW

DRIVING

FORCE

•Steam at high pressure & temperature is made to pass through a row of fixed blade mounted on stationary body in Casing. •There will be drop in pressure of the steam across the fixed blade resulting to very high steam velocity at the exit of fixed blade •The high velocity steam then impinges on another row of rotating blades mounted on the rotor shaft •The impingement of high velocity steam generates driving force on these rotating blades which rotate the rotor.

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What is a stage? STATIONARY BLADE

A set of fixed blades blades and rotating blades mounted on rotor is called stage of turbine. Depending on steam condition and power output, number of stages in steam turbine is decided.

ROTOR BLADE

STEAM TURBINE BLADING IN PRESENT SETS

HP TURBINE, IP TURBINE & INITIAL STAGES OF LP TURBINE REAR STAGES OF LP TURBINE

– CYLINDRICAL PROFILE BLADES

– TWISTED PROFILE BLADES

Thanks …