General Awareness in Steam Turbine Manufacturing

GENERAL AWARENESS IN STEAM TURBINE MANUFACTURING

submitted by:Anuj yadav(0800140016)

MAIN PART OF STEAM TURBINE :BLADEROTORIP 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 ROTORHIGH PRESSURE ROTOR HAVE LESS IN SIZE AND DIAMETERTHE R.P.M OF THE HIGH PRESSURE ROTOR IS LESS IN COMPARISON TO OTHER ROTOR

I.P ROTOR:INTERMEDIATE

PRESSURE ROTORIT 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 ROTORIT 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

9

FIXED BLADE ROW

ROTATING BLADE ROW

WORKING PRINCIPLE OF STEAM TURBINE

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.

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 & – CYLINDRICAL PROFILE BLADESINITIAL STAGES OF LP TURBINE

REAR STAGES OF LP TURBINE – TWISTED PROFILE BLADES

Thanks …