general awareness in steam turbine manufacturing
TRANSCRIPT
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
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