Our company has recently completed a major project on wind turbines. We provide our customers with major gearboxes and generators. This prompted our customers' projects to be completed smoothly. The customer response is very good.
一.Main principle
The working principle of the well-known wind power generation is relatively simple. The wind wheel rotates under the action of the wind. It converts the kinetic energy of the wind into the mechanical energy of the wind turbine shaft, and the generator rotates to generate electricity under the driving of the wind turbine shaft. Broadly speaking, wind energy is also solar energy, so it can also be said that wind turbines are thermal energy generators that use the sun as a heat source and the atmosphere as a working medium.
The well-known wind power generation is an electrical device that converts wind energy into mechanical energy and mechanical energy into electrical energy. Broadly speaking, it is a thermal energy utilization engine that uses the sun as a heat source and the atmosphere as a working medium. Wind power uses natural energy. It is much better than diesel power generation. However, if it is used in an emergency, it is still not as good as a diesel generator. Wind power cannot be considered as a backup power source, but it can be used for a long time.
The principle of the well-known wind power generation is to use the wind to drive the rotation of the windmill blades, and then increase the speed of the rotation through the speed increaser to promote the generator to generate electricity. According to the current wind turbine technology, about three meters per second of the breeze speed (the degree of breeze), you can start generating electricity.
- Basic structure
- Cabin: The cabin contains key equipment for the well-known wind power generation, including gearboxes and generators. Maintenance personnel can enter the cabin through the wind turbine tower. At the left end of the nacelle are wind turbine rotors, ie rotor blades and shafts.
- Rotor blades: catch wind and transmit wind power to the rotor shaft. On modern 600 kW wind turbines, each rotor blade has a measured length of approximately 20 meters and is designed to resemble an airplane's wing.
- Axis: The rotor axis is attached to the low speed shaft of the wind turbine.
- Low speed shaft: The low speed shaft of the wind turbine connects the rotor shaft to the gearbox. On modern 600 kW wind turbines, the rotor speed is quite slow, about 19 to 30 revolutions per minute. There are conduits for the hydraulic system in the shaft to activate the operation of the aerodynamic brake.
- Gearbox: The left side of the gearbox is the low speed shaft, which increases the speed of the high speed shaft to 50 times the low speed shaft.
- High-speed shaft and its mechanical brake: The high-speed shaft runs at 1500 rpm and drives the generator. It is equipped with an emergency mechanical brake for when the aerodynamic brake fails or when the wind turbine is being serviced.
- Generator: Usually called induction motor or asynchronous generator. On modern wind turbines, the maximum power output is typically between 500 and 1500 kW.
- Yaw device: Rotate the nacelle with the motor so that the rotor is facing the wind. The yaw device is operated by an electronic controller that can sense the wind direction through the wind vane. Usually, when the wind changes its direction, the wind turbine will only deflect a few degrees at a time.
- Electronic controller: Contains a computer that continuously monitors the state of the wind turbine and controls the yaw device. To prevent any malfunction (ie overheating of the gearbox or generator), the controller can automatically stop the rotation of the wind turbine and call the wind turbine operator via a telephone modem.
- Hydraulic system: An aerodynamic brake used to reset a wind turbine.
- Cooling element: Contains a fan for cooling the generator. In addition, it contains an oil cooling element for cooling the oil in the gearbox. Some wind turbines have water cooled generators.
- Tower: The wind turbine tower carries the nacelle and rotor. Usually tall towers have an advantage because the higher the ground, the greater the wind speed. Modern 600 kW wind turbines have tower heights of 40 to 60 meters. It can be a tubular tower or a lattice tower. Tubular towers are safer for maintenance personnel as they can reach the top of the tower through an internal ladder. The advantage of a latticed tower is that it is relatively inexpensive.
- Anemometer and wind vane: used to measure wind speed and direction
- Tail rudder: A small wind turbine (usually 10 kW or less) that is common in wind direction on a horizontal axis. Located behind the rotor, it is connected to the rotor. The main function is to adjust the fan steering so that the fan is facing the wind direction. The second function is to make the wind turbine head deviate from the wind direction in the case of windy wind conditions, so as to reduce the speed and protect the fan.
With Best Regards,
Lee ( Sales Department; Miss. )
NER GROUP CO.,LIMITED
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