Horizontal axis wind turbine with door fan blades and retractable rotor

Abstract

A horizontal-axis wind driven generator provided with a door-leaf-shaped blade and an extendable wind wheel comprises a tower (8), a fan main shaft (6), a generator (7), and an extendable wind wheel (16). The extendable wind wheel (16) further comprises a front frame, a rear frame, a regulation apparatus, and a door-leaf-shaped blade (4). The front frame comprises an inner frame (9) of the front frame and an outer frame (2) of the front frame. The rear frame comprises an inner frame (11) of the rear frame and an outer frame (5) of the rear frame. The inner frame (9) of the front frame and the outer frame (2) of the front frame are connected by means of a support rod (10) of the front frame. The inner frame (11) of the rear frame and the outer frame (5) of the rear frame are connected by means of a support rod (19) of the rear frame. The inner frame (9) of the front frame and the inner frame (11) of the rear frame are in key connection with a front section of the fan main shaft (6). An inner frame (9) of the front frame is slidably fitted to the fan main shaft (6). The inner frame (11) of the rear frame and the fan main shaft (6) are located by using bolts. The present invention improves output power and the wind capture efficiency of a fan, and reduces cost of power generation in a unit and reduces repair and maintenance costs, so that the present invention is suitable for a large or middle wind driven generator.

Description

technical field [0001] The invention relates to the technical field of wind power generation devices, in particular to a horizontal axis wind power generator with door fan-shaped blades and a retractable wind wheel. Background technique [0002] Wind power generators use wind energy to drive blades to drive the main shaft of the generator to rotate to generate electricity. It is clean and pollution-free and is widely used. Most of the existing wind turbines are three-blade horizontal-axis wind turbines. In order to ensure the rated output power of the generator, the height of the horizontal-axis wind turbines currently used is relatively high, and the overall height of the larger-power wind turbines is as high as 100 meters. , the rated power is lower than 2MW. If the rated output power of the wind turbine is further increased, the length of the blades and the height of the wind turbine need to be increased. Due to the limitation of the material strength and its own weight, ...

AI Technical Summary

Problems solved by technology

[0003] (1) After the height of the fan increases, the sloshing degree of the tower increases accordingly, and the wind resistance becomes worse. When it is 25m / s, it must be shut down, and the availability of the fan is reduced;

[0004] (2) The higher the height of the fan, the greater the difficulty of hoisting, the greater the danger of hoisting, etc., and the hoisting cost will increase significantly; the daily maintenance is difficult, and the maintenance cost will increase significantly;

[0005] (3) The increase in the power of wind turbines leads to an increase in the overall height of the wind turbines, a narrowing of the scope of application of wind power, and an increase in equipment maintenance costs, which will significantly increase the cost of obtaining unit kilowatts of electric energy, which is not competitive;

[0006] (4) Due to the limitation of existing material technology, it is difficult to further increase the length of fan blades; however, the existing large fan blades are easy to break, have short service life, and have high replacement costs;

[0007] (5) In the prior art, the adjustment of the three blades of the horizontal axis wind turbine often cannot be synchronized, resulting in forced shutdown

[0008] To sum up, the horizontal axis fans in the prior art are mature in technology, large-scale manufacturing, and low in cost. However, due to the limitation of the blade form, strength and the height of the fan tower, the fan output power is generally small, the blades are easy to break, The disadvantages of low blade fluttering efficiency and huge air leakage from the wind rotor are that the wind is abandoned at a wind speed of 13m / s and completely abandoned at 25m / s; moreover, the investment of wind power equipment is large, the cost recovery period is long, and the annual utilization hours are relatively low

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