Factory Price Large Power 2MW Water Wheel Generator
The power of generator(KW)
Butterfly valve control and Guide vane control
water turbine generator
Factory Price Large Power 2MW Water Wheel Generator
Francis Turbines are generally installed with their axis vertical. Water with high head (pressure) enters the turbine through the spiral casing surrounding the guide vanes. The water looses a part of its pressure in the volute (spiral casing) to maintain its speed. Then water passes through guide vanes where it is directed to strike the blades on the runner at optimum angles. As the water flows through the runner its pressure and angular momentum reduces. This reduction imparts reaction on the runner and power is transferred to the turbine shaft.
If the turbine is operating at the design conditions the water leaves the runner in axial direction. Water exits the turbine through the draft tube, which acts as a diffuser and reduces the exit velocity of the flow to recover maximum energy from the flowing water.
For power generation using Francis Turbine the turbine is supplied with high pressure water which enters the turbine with radial inflow and leaves the turbine axially through the draft tube. The energy from water flow is transferred to the shaft of the turbine in form of torque and rotation. The turbine shaft is coupled with dynamos or alternators for power generation. For quality power generation speed of turbine should be maintained constant despite the changing loads. To maintain the runner speed constant even in reduced load condition the water flow rate is reduced by changing the guide vanes angle.
Francis Turbine Components
1. Spiral Casing
Spiral casing is the inlet medium of water to the turbine. The water flowing from the reservoir or dam is made to pass through this pipe with high pressure. The blades of the turbines are circularly placed, which mean the water striking the turbines blades should flow in the circular axis for efficient striking. So the spiral casing is used, but due to circular movement of the water, it looses its pressure.
To maintain the same pressure the diameter of the casing is gradually reduced, so as to maintain the pressure uniform, thus uniform momentum or velocity striking the runner blades.
2. Stay Vanes
Stay vanes and guide vanes guides the water to the runner blades. Stay vanes remain stationary at their position and reduces the swirling of water due to radial flow, as it enters the runner blades. Thus making turbine more efficient.
3. Guide Vanes
Guide vanes are not stationary, they change their angle as per the requirement to control the angle of striking of water to turbine blades to increase the efficiency. They also regulate the flow rate of water into the runner blades thus controlling the power output of a turbine according to the load on the turbine
4. Runner Blades
The performance and efficiency of the turbine is dependent on the design of the runner blades. In a Francis turbine, runner blades are divided into 2 parts. The lower half is made in the shape of small bucket so that it uses the impulse action of water to rotate the turbine.
The upper part of the blades use the reaction force of water flowing through it. These two forces together makes the runner to rotate.
5. Draft Tube
The pressure at the exit of the runner of Reaction Turbine is generally less than atmospheric pressure. The water at exit cannot be directly discharged to the tail race. A tube or pipe of gradually increasing area is used for discharging water from the exit of turbine to the tail race.
This tube of increasing area is called Draft Tube. One end of the tube is connected to the outlet of runner while the other end is sub-merged below the level of water in the tail-race.
2,Turgo turbine generators series, e.g. vertical type and horizontal type.
3,Tubular turbine generators series, e.g. Bulb type and shaft extension type
4,Francis turbine generators series
5,Impulse turbine generators series and double turbine generators series and so on.
Q1, Which turbine should I choose?
Please tell me the water head, flow rate, frequency, Total power you need
, voltage, on grid or off grid operation, we will propose a solution.
Q2, Can your factory provide all the equipment for hydropower generation?
Yes, we can provide you with turbines, hydro-generators, pressure regulators, turbine wheels, control panels, transformers, monitoring systems and more.
Q3, Can you do EPC for a hydroelectric power plant?
Yes, we can provide TURN-KEY and EPC services including measurement, design, manufacturing, construction, manufacturing, commissioning, inspection, maintenance runner replacement and refurbishment/upgrade/improvement/repair/refurbishment of turbines/generators including bearings, seals For parts and key parts, we will send technicians and workers to install equipment.
Q4,Is your company a trading company or a manufacturer?
We are a manufacturer of hydro turbine generators and started to promote the international market in 2013. Our factory is located in Sichuan, where China's water conservancy and hydropower is most developed. Welcome to visit our factory in China.
Q5, What is an acceptable MOQ?
For this product, our acceptable MOQ is 1 set.
Q6,How long is the delivery time?
Delivery times range from 15 days to 6 months depending on the model you are purchasing.
Q7,Does your company have its own independent official website?
Of course, and we can see more information about our company and products on our official website. website address: www.fstgenerator.com