Bhel vocational training

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Bhel vocational training

  1. 1. Overview - B.H.E.L  BHEL is the largest engineering &manufacturing enterprise in India.  Established 40 years ago.  Earns profits continuously since 1971-72,& paying dividends since 1976-77
  2. 2. Vision, Mission & Values Vision Mission Values • A world class engineering enterprise committed to enhancing stakeholder values. • To be an Indian multinational engineering enterprise providing total business solution through quality products. • Meeting commitments made to external & internal customers. • Respect for dignity & potential of individuals. • Integrity and fairness in all matters.
  3. 3. BHEL HEEP(Heavy Electrical Equipment [Plant) CFFP(Central Foundary Forged Plant)
  4. 4. Heep(Heavy Electrical Equipment Plant) Block 1 : Electrical Machine Shop Block 2 : Heavy Fabrication Shop Block 3 : Turbine Manufacturing Block 4 : CIM( Coils & Insulation Manufacturing ) Block 5 : Condenser fabrication & Forgr Block 6 : Fabrication Shop,Die Shop, Stamping Shop Block 7 : Carpantry Shop Block 8 : Heat Exchanger shop
  5. 5. Block 1  Machine section  Assembly section  Stator winding        Machine section Iron assembly Heavy rotor assembly section Stator winding section Armature/Rotor section General assembly section Test stands Hydro generator Turbo generator
  6. 6. TURBO GENRATOR 210 MW 500 MW
  7. 7. Sailent feature of Turbo Genrator  Rated output : 588 MVA,500 MW  Terminal voltage : 21 KV  Rated stator current : 16 KA  Rated frequency : 50 Hz  Rated power factor : 0.85 Lag  Efficiency : 98.55%
  8. 8. Turbo Genrator  Turbo generator consists of following parts: o o o o  STATOR ROTOR BEARINGS SHAFT BEARINGS Other additional auxiliaries: o Excitation system
  9. 9. Stator  Stator frame  Stator core  Stator winding  End shields  Terminal bushing  Phase connector  Hydrozen cooler
  10. 10. Stator frame  Stator body is a totally enclosed gas tight fabricated structure made up of high quality mild steel  At top of the stator frame U- shape pipe is situated which are used to flow of water for cooling .
  11. 11. Stator Core  The laminated core made by cold rolled high quality silicon steel  It is stacked with lamination segments & Segments are assembled in an interleaved manner from layer to layer for uniform permeability.
  12. 12. Stator Winding  The stator has a three phase, double layer, short pitched and bar type of windings having two parallel paths  Each bar consist of hollow conductor with cooling water passing through the latter.  Bhel used to epoxy mica thermosetting insulation for stator bars.
  13. 13. Vaccum Pressure Impregration  In 1956 Dr. MEYER has brought this system.  In this process preheating, impregration,post curing& electrical testing are done.  It remove the penetrating air pockets in the winding.
  14. 14. Rotor  Rotor shaft  Rotor winding  Rotor wedges  Rotor retaining rings  Field connections  Fans
  15. 15. Rotor shaft  Rotor shaft is a single piece solid forging manufactured from a vacuum casting.  The longnitudnal slots are distributed over the circumfrence
  16. 16. Rotor winding  The rotor winding distributed symmetrical in the rotor pole  The winding itself is made up of many turns of copper .  All of the turns associated with a single slot are called a coil.
  17. 17. Retaning Ring
  18. 18. Retaning Ring  The overhang portion of the field winding is held by non- magnetic steel forging of retaining against centrifugal forces.  They are shrink fitted to the ends of the rotor body at one end.  The other side of retaining ring does not make contact with the shaft .  To reduce stray losses, the retaining rings are made of non- magnetic, austenitic steel and cold worked, resulting in high mechanical strength.
  19. 19. Fans  The generator cooling gas is circulated by two single stage axial flow propeller type fans.  The fans are shrink fitted on either side of rotor body.  Fan hubs are made of alloy steel.  Fan blades which are precision castings with special alloy are machined in the tall portion.
  20. 20. Thank you !
  21. 21. For More About Electrical Engineering visit Technofriendz A community of technical scholars technofriendz.weebly.com

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