BHEL is one of India's largest engineering companies that designs and manufactures heavy machinery including steam turbines. It has several manufacturing units across India including one in Haridwar, Uttarakhand. The Haridwar unit has a Turbine Manufacturing Shop that produces steam turbines using CNC machines. The turbine production process involves machining components like casings from steel and casting blades from alloys using various machines and operations.
2. Overview of BHEL
BHEL was established in 1964.
BHEL is one of the only 7 Public Sector Undertakings (PSUs) of
India clubbed under the esteemed 'Maharatna' status . On 1st
February 2013, the Government of India granted Maharatna status
to BHEL.
BHEL is engaged in the design, engineering, manufacture,
construction, testing, commissioning and servicing of a wide range of
products and services for the core sectors of the economy, viz.
Power, Transmission, Industry, Transportation (Railway), Renewable
Energy, Oil & Gas and defence.
BHEL has 15 manufacturing divisions, two repair units, four regional
offices, eight service centers and 15 regional centers.
4. Product Range
Boiler(stream generator)
Gas Generator
Hydro Generator
Steam turbine
Gas turbine
Hydro turbine
Transportation Equipments
Traction Machines
Transformer
Switchgear
Oil field equipments OFE
Boiler drum
Water wall panel
Wind mill
Valve
Electro-static Precipitator
sR & D products
5. BHEL HARIDWAR Unit
BHEL or the Bharat Heavy Engineering Limited is one of the largest
engineering and manufacturing organizations in the country and the
BHEL, Haridwar is their gift to UTTARAKHAND With two large
manufacturing plants. It has established a Heavy Electrical Equipment
Plant or HEEP and a Central Foundry Forge Plant or CFFP in Haridwar.
The Heavy Electrical Equipment Plant in Haridwar designs and
manufactures turbo generators, AC and DC motors, STEAM turbines, heat
exchangers.
The Central Foundry Forge Plant in Haridwar deals with steel castings and
manufacturing of steel forgings.
The BHEL plants in Haridwar have earned the ISO - 9001 and 9002
certificates for its high quality and maintenance. These two units have also
earned the ISO - 14001 certificates.
Situated in Ranipur near Haridwar, the Bharat Heavy Engineering Limited
employs over 8,000 people.
7. BLOCK 3
TURBINE SHOP
BAY 1 BAY 2 BAY 3
HEAVY MACHINE
SHOP(HMS)
BEARING SECTION BLADE SHOP
ASSEMBLY SECTION TURNING SECTION TURNING SECTION
ASSEMBLY SECTION HEAT TREATMENT
SHOP
GOVERNING SECTION
Block-3: Turbine Manufacturing Shop
8. STEAM TURBINE
A steam turbine works on the principle
of conversion of High pressure & temperature steam
into high Kinetic energy , thereby giving torque to a
moving rotor.
10. High pressure turbine (H.P.
Turbine)
• High pressure and temperature fluid at the inlet of the turbine exit
as lower pressure and temperature fluid.
Specification of HP Turbine(500 MW)
Main Steam Temp- 537˚C
main steam pressure- 170 kg/cm2
Reheat steam temp- 537˚C
Length of Rotor - 4.61m
Height -2.15m
Weight -86400kg
12. H.P turbine blades
.The blades are responsible for extracting energy from the
high temperature, high pressure steam produced by
the boiler.
13. INTERMEDIATE PRESSURE TURBINE
Intermediate pressure turbine having more pressure then
L.P turbine and lass than the high pressure turbine(H.P) .
Its blade is larger than high pressure turbine.
15. Blade of intermediate pressure
turbine The size of blades of I.P steam turbine is larger than
H.P steam turbine , but smaller than L.P steam
turbine.
16. Low Pressure Turbine
LP turbine is designed to be a dual flow turbine. Steam enters the
centre of the turbine from the crossover pipe and flows across the
reaction blading in two opposite directions. This configuration
reduces axial thrust on the turbine and allows for a smaller
turbine installation.
Specification of LP Turbine(500 MW)
Main Steam Temp- 320˚C
Main steam pressure- 8 kg/cm2
Reheat steam temp- 320˚C
Length of Rotor - 8.71m
Height -10.7m
Weight-345000kg.
19. Low Pressure Turbine blade
Titanium alloys offer high strength to intermediate
temperatures at a density almost half that of steel and
nickel-based super alloys. As a result, they have been
adopted widely in the fan and compressor stages of the gas
turbine for both disc and blade applications..
LP blade is larger than HP & IP.
20.
21. SINUMERIK CNC lathe
Swing over
carriage:3500mm
Centre distance
:9000mm
Weight capacity:120 T
Spindle power:196KW
External chucking
range:250-2000mm
Max spindle rpm:200
CNC system
840D:SINUMERIK
24. Skoda Vertical CNC lathe
Finishing machining casings
including guide blade grooves
are carried out in vertical
position on this lathe. The
machine is provided with 840-C
CNC system.
30. BLADE SHOP
Various operations consist in manufacturing of
blades of steam turbine.
Check the raw material(Stainless Steel / Titanium
Alloy)
Blanking-by blank saw m/c
MILLING- width and thickness are maintained
Mill Rhomboid –Rhomboid shape is provided by
Duplex milling machine
Blanking of Rhomboid shape
35. T-ROOT PROFILE OF BLADE
T –ROOT profiling is done by NC M/c at various station
STATION 1- Clamping the w/p on NC m/c .
STATION 2- Rough Tapering
STATION 3- T-ROOT Cutting, Chamfering
STATION 4- Stepping
STATION 5- Smoothing o/p(final milling).
37. CONCLUSION
Summer Training gives the idea of ‘general awareness in
steam turbine manufacturing’, & its process. Its provides
practical idea to manufacturing several components of
turbine.