bhel haridwar
TRANSCRIPT
1
PRESENTATIONON
INDUSTRIAL TRAININGTAKEN AT
BHARAT HEAVY ELECTRICALS LIMITED,
HARIDWAR
BHEL AT A GLANCE --INTRODUCTION - -
ESTABLISHED MORE THAN 50 YEARS AGO IN BHOPAL
CATERS TO CORE SECTOR OF INDIAN ECONOMY.
THE WIDE NETWORK INCLUDES BHEL's 14 MANUFACTURING DIVISION, 8 SERVICE CENTER ,4 POWER SECTOR REGIONAL CENTERS, OVER 150 PROJECT SITES AND 18 REGIONAL OFFICES
COMPANY CONTRIBUTES MORE THAN 75% OF THE NATIONAL GRID, SHARE OF 45% COMES FROM BHEL-Hardwar.
2
3
ACHIEVEMENTS -- INDIA’S “NAVRATNA” COMPANY
ENJOYS PLACE IN “ FORTUNE 500 COMPANIES”
RANKED AMONG TOP 12 COMPANIES IN THE WORLD MANUFACURING POWER GENERATION EQUIPMENTS
ONLY PSU AMONGST 12 INDIAN COMPANIES TO FIGURE IN “ FORBES ASIA FABULOUS 50” LIST
HAS EARNED ISO 9000 , ISO 14001 AND OHSAS 18001
4
BHEL HARIDWAR -- HAS TWO UNITS HEEP AND CFFP
Heavy electrical equipment plant
Central foundry forge plant
5
HEAVY ELECTRICAL EQUIPMENT PLANT --
ESTABLISHED UNDER THE INDO- SOVIET AGREEMENT IN 1959-60
STARTED MANUFACTURING THERMAL SETS IN 1967
NOW MANUFACTURES THERMAL SETS OF 210, 250, 500 MW TURBO GENERATORS & TURBINES WITH ALL ASSOCIATIVE EQUIPMENTS
6
FACILITIES ( PLANT PREMISES ) --
DIVIDED INTO EIGHT BLOCKS
BLOCK 1 (ELECTRICAL MACHINES BLOCK) –
TURBO GENERATORS, EXCITERS AND AC , DC MOTORS ARE MANUFACTURED
MAJOR FACILITIES -- Machine Shop, assembling, painting section, packing & preservation, over speed balancing, test bed, test stand etc.
7
CONVENTIONAL BAYWISE DISTRIBUTION --
BAY-1 ROTOR SHAFT MACHINING
SHAFT SLOTTING
ROTOR WINDING
OVERSPEED AND BALANCING TUNNEL
LSTG
BAY-2 EXCITER SHAFT MACHINING
STATOR BODY MACHINING
STATOR WINDING
TOTAL IMPREGNATION
TEST BED
BAY-3 ROTOR SUPPORT BEARING
SHAFT SEAL BODY
DC MOTOR WINDING
BAY-4 COOLING FANSMACHINING
ARRANGEMENT AND OTHER PARTS
8
TURBO GENERATOR --
INTRODUCTION— COMMONLY KNOWN AS ALTERNATOR.
WORKS ON THE PRINCIPLE OF E.M.I.
PRODUCES A THREE PHASE ALTERNATING E.M.F OF CONSTANT FREQUENCY.
GENERALLY HAVE LARGE AXIAL LENGTH AND SHORT DIAMETER WITH CYLINDRICAL ROTOR.
HIGH SPEED GENERATOR .
SPEED– 3000 rpm
9
TYPES OF TG
10
COMPONENTS OF T.G.--
STATOR— 1. STATOR FRAME.
2. STATOR CORE. 3. STATOR WINDING
4. END COVERS ROTOR— 1. ROTOR SHAFT 2. ROTOR WINDINGS 3. RETAINING RING COOLING SYSTEM EXCITATION SYSTEM
11
Manufacture process for TG
12
STATOR FRAME--
HOUSES ARMATURE CONDUCTORS.
MADE OF CYLINDRICAL SECTION WITH TWO END SHIELDS WHICH ARE GAS TIGHT AND PRESSURE RESISTANT.
TESTING ON THE FRAME HYDRAULIC TESTING
PNEUMATIC TESTING
13
STATOR FRAME
14
STATOR CORE --
STACKED FROM INSULATED ELECTRICAL SHEET LAMINATIONS MADE OF SILICON STEEL.
SHEETS ARE LAYERED IN THE FORM OF BUTT JOINTS, GROUP OF LAYERS FORM THE PACKETS.
PACKETS ARE ALLIGNED BY THE STUDDS
IMPOSED VENTILLATION DUCTS FOR COOLING AFTER EACH PACKET
DOVETAIL BARS AND HEADER ARE USED.
15
STATOR CORE
16
ROTOR --
MOVING OR ROTATING PART OF GENERATOR, HOUSING THE FIELD WINDING
CYLINDRICAL TYPE CONSTRUCTION IS USED HENCE LARGE AXIAL LENGTH COMPARED TO DIAMETER.
WINDING CARRIES VERY HIGH CURRENT
REVOLVES AT A SPEED OF 3000 RPM.
17
ROTOR
18
STEPS IN ROTOR MACHINING--
SHAFT MACHINING
SLOT CUTTING
ROTOR WINDING
ROTOR SLOT WEDGES
19
PARTS OF ROTOR
1. ROTOR SHAFT
2. ROTOR WINDING
3. ROTOR WEDGES
4. RETAINING RING
5. FANS
20
1. ROTOR SHAFT --
CHROMIUM, MOLYBDENUM, NICKLE & VANADIUM MAIN CONSTITUENT OF ROTOR STEEL.
LONGITUDINAL SLOTS & CROSS SLOTS.
180 DEGREE DISPLACED MAGNETIC POLES.
21
ROTOR SHAFT
22
2. FIELD WINDING --
SERIES CONNECTED COILS INTO LONGITUDINAL SLOTS.
WOUND TO HAVE TWO POLES.
CONDUCTORS HAVE RECTANGULAR CROSS SECTION.
28 STRIPS OF COIL USED TO MAKE SINGLE COIL OF FIELD WINDING
FINISHING OF COIL
23
3. ROTOR RETAINING RINGS --
CENTRIFUGAL FORCES OF THE END WINDINGS ARE CONTAINED BY RRR.
SECURED IN THE AXIAL POSITION BY SNAP RINGS.
PLACED OVER THE ROTOR BY FITTING.
24
ROTOR RETAINING RING --
25
4. ROTOR FANS --
The cooling air in generator is cold by two axial flow fans.
located at the rotor shaft one at each end augment the cooling of the winding.
The blades of fan have threaded roots for screwed into the rotor shaft.
26
EXCITER --
FUNCTION IS TO PRODUCE NECESSARY DC FOR TURBO GENERATORS FIELD WINDING
AC EXCITER WITH ROTATING ARMATURE AND STATIONARY FIELD
AC VOLTAGE IS RECTIFIED TO DC AND FED TO GENERATOR FIELD WINDING
27
EXCITER COMPONENTS--
1. DIODE WHEEL (RECTIFIER)
2. PMG OR PILOT EXCITER
3. SLIP RING
4. AVR
28
EXCITER
29
EXCITER
30
CONCLUSION
Improved practical knowledge and awareness abt. TG
Got to know about the technology and material used in manufacturingof turbo generators.
Turbo Generator and exciter are manufactured in HEEP part
Manufacturing process mainly divided into Stator Section And Rotor Section
Each and everyprocess is carried out in a sequential process.
31
Turbo generators are designed with the Closed circuit air cooling withwater or air coolers mounted in the pit.
Raw material are usedonly after thorough material testing in the testing lab.
32
REFERENCES
Manuals Provided by Manager of Block-1
Electrical machinery by Dr. P.S. Bimbhra
www.wikipedia.org
www.bhel.com/
www.google.com
33
THANK YOU
34
ANY QUERIES ?