CN101197518A - Aerogenerator with movable stator - Google Patents

Abstract

A wind power generator with a movable stator belongs to wind power generators. Including stand (1), wind wheel (2), low-speed shaft (3), gearbox (4), high-speed shaft (5), generator rotor (6), generator stator (7), slide rails (8) , sliding vane (9), connecting rod (10), sliding vane regulator (11), wind speed sensor (12). The stator of the generator and the sliding vane are fixed, and the position in the sliding rail is adjusted by the sliding vane regulator according to the wind speed signal measured by the wind speed sensor. Under normal wind speed, part of the stator winding coils participate in the rotating cutting of the generator rotor; when the wind speed increases to high wind speed conditions, the slide regulator adjusts the position of the generator stator through the connecting rod and the sliding vane, so that the stator participating in the rotating cutting of the generator rotor The number of winding coils increases, thereby increasing the power generation and keeping the speed of the wind rotor at a low level. It has the advantages of high utilization efficiency of wind energy, strong adjustment ability and good safety.

Description

Wind turbine with movable stator

technical field

The invention relates to a wind power generator with a movable stator, which belongs to the technical field of wind power generators.

Background technique

As the most mature renewable energy technology, wind power generation is a practical solution to the imminent natural environment and social crisis caused by the massive use of traditional fossil fuel energy. All over the world, wind power generation is developing rapidly and continuously. In the past 20 years, the maximum power of a single wind turbine has changed from tens of kilowatts to 2,500 kilowatts today, and is moving towards 5,000 kilowatts for a single machine. The goal is moving forward. The power of wind farms using multiple units connected to the grid for power generation can reach hundreds of thousands of kilowatts, and has become an important part of the energy supply chain, rather than a dispensable supplementary energy source. my country has a vast territory and is rich in wind energy resources. With the continuous advancement of science and technology, the economics of wind power generation has been continuously improved. In addition, my country has taken renewable energy as an important part of my country's energy strategy, and wind power has a huge potential market.

Due to the strong wind force all year round, the offshore and plateau areas can use wind energy to generate electricity for more hours, and become the main areas for the construction of wind farms in the future and in the future. In order to realize the high-efficiency operation of the wind turbine in the environment of high wind speed, it is necessary to configure the necessary adjustment measures in the wind turbine system to ensure that the generator can maximize the use of wind energy to generate electricity. At present, the method of variable pitch is usually used to realize the adjustment of wind power generation power with the change of wind speed, and obtain high wind energy utilization efficiency. However, the common problems of the above methods are that the structure is complex, the adjustment ability is limited, and due to the constraints of materials, manufacturing technology and control methods, the generator blades will have to be stalled under high wind speed conditions, even if the generator stops. work, and this has just wasted a large amount of high-efficiency wind energy in vain. For this reason, it is very necessary to develop wind energy utilization technology with wide wind speed and high efficiency.

Contents of the invention

The purpose of the present invention is to provide a wind power generator with a movable stator that is suitable for wide wind speed, strong adjustment ability, high safety, and can work efficiently under high wind speed conditions.

It includes a platform, a wind wheel, a low-speed shaft, a gearbox, a high-speed shaft, a generator rotor, a generator stator, and a nacelle cover. The wind wheel is connected to the input end of the low-speed shaft, and the output end of the low-speed shaft is connected to The input end of the gearbox on the top, the output end of the gearbox is connected to the input end of the high-speed shaft, the output end of the high-speed shaft is connected to the generator rotor, the generator rotor is placed in the generator stator, and the nacelle cover is placed on the platform. Covering the gear box, the generator rotor, and the generator stator is characterized in that it also includes slide rails, slide vanes, connecting rods, slide vane regulators, and wind speed sensors, wherein the slide rails are placed on the stand and fixed on The slide on the generator stator for adjusting the position of the generator stator is placed on the slide rail, the slide is connected to the output end of the slide adjuster through the connecting rod, and the input end of the slide adjuster is connected to the wind speed sensor. The slide adjuster is fixed on the stand and placed in the cabin cover.

The working principle of the present invention is that the stator of the generator is fixed with the slide vane, and the position in the slide rail is adjusted by the slide vane regulator according to the wind speed signal measured by the wind speed sensor. Under normal wind speed, the slide vane is at a certain position on the slide rail, and part of the stator winding coils participate in the rotating cutting of the generator rotor; when the wind speed increases to a high wind speed condition, the wind speed sensor transmits the signal to the slide vane regulator, and the slide vane The regulator adjusts the position of the generator stator through the connecting rod and the sliding plate, so that the number of stator winding coils participating in the rotation cutting of the generator rotor increases, thereby increasing the power generation, and increasing the braking torque generated by the interaction between the stator magnetic field and the rotor magnetic field. Keep the speed of the wind rotor at a low level to protect the safe operation of the wind rotor.

Compared with the traditional wind turbines currently used, it has outstanding advantages such as high wind energy utilization efficiency, strong adjustment ability, and good safety. into electrical energy, thereby increasing the power generation and improving the efficiency of wind power generation.

Description of drawings

Figure 1 is a schematic diagram of a wind generator with a movable stator.

Label names in Fig. 1: 1, platform, 2, wind wheel, 3, low-speed shaft, 4, gear box, 5, high-speed shaft, 6, generator rotor, 7, generator stator, 8, slide rail, 9, Slider, 10, connecting rod, 11, slide regulator, 12, wind speed sensor, 13, cabin cover

Detailed ways

According to shown in Figure 1, the wind power generator of movable stator of the present invention comprises platform 1, wind wheel 2, low-speed shaft 3, gear box 4, high-speed shaft 5, generator rotor 6, generator stator 7, nacelle cover 13, wherein the wind wheel 2 is connected to the input end of the low-speed shaft 3, the output end of the low-speed shaft 3 is connected to the input end of the gearbox 4 fixed on the platform 1, and the output end of the gearbox 4 is connected to the input end of the high-speed shaft 5 The output end of the high-speed shaft 5 is connected to the generator rotor 6, the generator rotor 6 is placed in the generator stator 7, the cabin cover 13 is placed on the platform 1, and the gear box, the generator rotor and the generator stator are covered , is characterized in that it also includes a sliding rail 8, a sliding vane 9, a connecting rod 10, a sliding vane regulator 11, and an wind speed sensor 12, wherein the sliding rail 8 is placed on the stand 1 and fixed on the generator stator 7 The slide 9 used to adjust the position of the generator stator 7 is placed on the slide rail 8, the slide 9 is connected to the output end of the slide regulator 11 through the connecting rod 10, and the input end of the slide regulator 11 is connected to the wind speed sensor 12 is connected, and the slide regulator 11 is fixed on the platform 1 and placed in the cabin cover 13.

When the wind generator is working, the wind wheel is driven by the wind to rotate, and its speed is transmitted to the gearbox through the low-speed shaft to increase the speed. The high-speed shaft through the speed-up is connected to the rotor of the generator, which drives the rotor to rotate at high speed and cuts the magnetic field lines to generate electric potential energy. Since the length of the blades of the wind rotor is as high as tens of meters, the linear velocity of the outer edge of the blades is very high. Excessively high speeds will not only cause a large amount of mechanical energy loss converted from wind energy, but also greatly reduce the power generation efficiency, and will also induce a large number of The additional stress poses a potential threat to the operation safety of the blades. For reasons of efficiency and safety, the speed of the wind rotor should work within a certain range. For high wind speed environments, in order to ensure the safety of equipment, traditional wind turbines usually perform stall regulation, which wastes a lot of high-efficiency wind energy. In order to ensure that the wind turbine can work efficiently at high wind speeds and convert more wind energy into electrical energy, slide rails can be laid on the wind turbine stand, and slides can be set on the slide rails. The slides and generator stator Fixed, connected with the slide regulator through the connecting rod, the position of the generator stator and the slide in the slide rail is adjusted by the slide regulator according to the wind speed signal measured by the wind speed sensor. Under normal wind speed, the slide vane is at a certain position on the slide rail, and part of the stator winding coils participate in the rotating cutting of the generator rotor; when the wind speed increases to a high wind speed condition, the wind speed sensor transmits the signal to the slide vane regulator, and the slide vane The regulator adjusts the position of the generator stator through the connecting rod and the sliding plate, so that the number of stator winding coils participating in the rotation cutting of the generator rotor increases, thereby increasing the power generation, and increasing the braking torque generated by the interaction between the stator magnetic field and the rotor magnetic field. Keep the wind wheel at a low speed to protect the safe work of the wind wheel.

Compared with the traditional wind turbine currently used, although the wind turbine with a movable stator increases the cost of the slide regulator and slide rail, as well as the energy consumption required for work, it has high wind energy utilization efficiency and strong adjustment ability. , good safety and other outstanding advantages, it can meet the requirements of high-efficiency work of wind turbines under high wind speed conditions, convert wind energy into electrical energy as much as possible, and improve the efficiency of wind power generation.

Claims (1)

1. A wind-driven generator with a movable stator, comprising a stand (1), a wind wheel (2), a low-speed shaft (3), a gear box (4), a high-speed shaft (5), a generator rotor (6), Generator stator (7), nacelle cover (13), wherein the wind wheel (2) is connected to the input end of the low-speed shaft (3), and the output end of the low-speed shaft (3) is connected to the gear fixed on the platform (1) The input end of the box (4), the output end of the gearbox (4) are connected to the input end of the high-speed shaft (5), the output end of the high-speed shaft (5) is connected to the generator rotor (6), and the generator rotor (6) placed in the generator stator (7), the nacelle cover (13) is placed on the stand (1), and the gear box (4), the generator rotor (6) and the generator stator (7) are covered, and it is characterized in that , also includes slide rail (8), slide vane (9), connecting rod (10), slide vane regulator (11), wind speed sensor (12), wherein slide rail (8) is placed on bench (1) Above, the sliding piece (9) fixed on the generator stator (7) and used to adjust the position of the generator stator (7) is placed on the slide rail (8), and the sliding piece (9) is connected to the The output end of the sliding vane regulator (11), the input end of the sliding vane regulator (11) is connected with the wind speed sensor (12), and the sliding vane regulator (11) is fixed on the platform (1) and placed on the cabin cover (13).

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