1200kw Francis Turbine for Hydro Power Plant
Overview
The Francis turbine fills a large gap between the Pelton and Kaplan
and it is widely used. They operate in water head from 10 to 600
meters, and are primarily used for electric power generation. Their
power output can be calculated from the water head and flow rate
and typically range from 10 to more than 700 megawatts. One of the
distinct advantages of the Francis turbine with respect to other
water turbines is that they can also be used as water pump. This
makes them ideal for a pumped storage systems.
1. Water inlet parts
Water inlet parts consist of connecting pipe, turbine inlet valve
and expansion joint. Turbine inlet valve is used to close the unit
in static water when need stop, it is also used to close the unit
and cut the water flow in dynamic water when the unit is in
emergency and turbine distributor break down. Expansion joint is
used to compensate installation error and for the convenience of
maintenance. Water drainage valve is located on the bottom. One end
of connecting pipe is connected with the turbine inlet valve;
another end is connected with the pipe of power plant (welded at
site).
2. Spiral case
Spiral case is welding part, equipped with fixed guide vane in it.
Spiral case shall make the water become number of swirl of water
flow and guide water to flow regularly into guide vane apparatus
and runner along circumference. It is equipped with an air relieve
valve on the top of spiral case to exhaust air when filling water
initially.
3. Turbine distributor
It consists of guide vane, guide vane lever, shaft sleeve, front
cover, back cover, etc. It can form or change number of swirls of
water flow to adjust turbine discharge according to variation of
load. It is also used to normal and emergency shut down. The shape,
dimensions, quantity and position of the 16 guide vanes is similar
to the accepted model turbine, shall ensure the water flow won't
cause vibration during operating. Diameter of spacing circle of
guide vane is 860 mm. The guide vane has the hydraulic torque
performance of self-close trend within the range from full opening
to near no-load opening. The maximum opening of guide vane shall
have certain margin. Stop block is equipped for each guide vane,
the guide vane can be controlled to swing with certain range and
won't hit with other guide vanes when the shear pin is broken and
the friction device between guide vane and guide vane lever is out
of service. The guide vane is made of ZG230-450, they shall be
interchangeable. Each guide vane is machined precisely; the
contacting line of adjacent guide vanes shall be finished to ensure
perfect contact of all guide vanes under closing state in order to
reduce water leakage. The bearings for guide vane shaft and
distributor shaft are self-lubricated sliding bearings; the bearing
shoe adopts steel back complex material. Use guide vane lever end
cover and bolt to adjust and keep the position of each guide vane
to the front cover and the rear cover. The sealing is located on
upper guide vane shaft to cut the flow. The control ring is made by
cast steel as a whole. Circular wiring plate is located on the
external circumference of the control ring. The control ring has
enough strength and rigidity, won't occur excessive bending due to
unbalance stress of servomotor.
4. Runner
Runner is the heart of the turbine; it can transfer water energy to
mechanic energy. Runner is welded as a whole, crown, band and blade
is made of stainless steel ZG0Cr13Ni4Mo which has perfect
performance of anti-cavitation, anti- corrosion and weldable. Crown
and band adopts gap type sealing to reduce water leakage. Shape of
each runner blade shall be machined according to standard GB/T
10969 "Specifications for water passage components of hydraulic
turbines". The runner is welded and heat treated according to
special specification, subject to non-destructive inspection
according to ASME standard. The runner is subject to static balance
testing after machining. Sixteen φ22 holes are located on runner
crown in order to reduce the pressure applied on runner by the
water.
Specification
| Name | 1200kw Water Turbine Generator |
| Water Head | 67m or customized |
| Runner Diameters | 2.28m |
| Capacity | 800KW |
| Frequency | 50HZ |
| Generator Voltage | 400V |
| Layout pattern | Horizontal |
| Material(blades) | Stainless Steel ZG0Cr13Ni4Mo |
| Excitation | Brushless |
| Generator Insulation | F/F |
| Lifespan | 50 years |
Why choose us?
1. More than 20 years of industry experience, install commissioning
more than 150 equipment each year
2. Provide complete proposal for hydro power plant from water to
wire
3. Abundant foreign power plant project implementation experience
such as France, Japan, USA, South Africa, Sri Lanka, Iran,
Southeast Asia
4. Design and manufacture of hydro power generator with voltage
400V,6.3KV . capacity exceed 1000kw with 400V
FAQ
1.You are a trading company or a manufacture?
We are a hydro turbine generator manufacture with over 20 years of
experiences, Our factory is in the Sichuan you will take 2 hours
driving after you reach Shuangliu Airport, pay a visit to our
factory you will know more about us.
2.What Kind of water turbine should I choose?
We need to know water head, flow rate, voltage level, frequency,
on-grid or off-grid running, automation level from you to work out
the solution
3: Can you do the EPC for the hydro power plant?
Yes, We can design, producing and install the equipment, we will
dispatch technologist and workers to install the equipment.
