Wind turbine blade capable of automatically adjusting length through incoming flow wind speed

Abstract

The invention provides a wind turbine blade capable of automatically adjusting length through incoming flow wind speed. The wind turbine blade comprises a blade main body, a telescopic blade, a telescopic mechanism, a driving mechanism and a control mechanism, a cavity is formed in the blade body, an opening communicated with the cavity is formed in the first end of the blade body, and the opening is connected with a sealing assembly. The telescopic blade is arranged in the cavity in a manner of extending out of the opening; the telescopic mechanism, the driving mechanism and the control mechanism are fixed in the cavity, the control mechanism is connected with the driving mechanism, and the driving mechanism is in transmission connection with the telescopic blades through the telescopic mechanism; and the second end of the blade main body is connected with a mounting head. According to the wind turbine blade capable of automatically adjusting the length through the incoming flow wind speed, the blade tip part can automatically stretch out and draw back according to the incoming flow wind speed, the length of the blade can be automatically adjusted, more wind energy can be captured, the power of a wind turbine is kept in a large interval, the wind energy capturing efficiency of the blade is improved, and the power of the wind turbine is improved.

Description

technical field [0001] The invention relates to the field of wind turbine blades, in particular to a wind turbine blade whose length can be automatically adjusted according to the incoming wind speed. Background technique [0002] A wind turbine is a power device that converts wind energy into mechanical work, which drives the rotor to rotate, and finally outputs alternating current. A wind turbine generally consists of components such as a wind wheel, a generator, a tower, a speed-limiting safety mechanism, and an energy storage device. The working principle of the wind turbine is relatively simple. The wind wheel rotates under the impetus of the incoming wind speed, which converts the rotational kinetic energy of the wind wheel into the mechanical energy of the wind wheel. Driven by the low-speed shaft of the wind turbine, the generator outputs a high-speed shaft through the planetary gear. , drives the generator to rotate to generate electricity. In a broad sense, wind en...

AI Technical Summary

Problems solved by technology

[0003] The blades of wind turbines in the prior art are generally fixed-length blades. A wind turbine with a fixed blade length cannot automatically expand and contract the blades according to the wind speed of the incoming flow, which reduces the efficiency of the blades in capturing wind energy, reduces the power generated by the wind turbine, and reduces economic benefits. to weaken

Secondly, wind turbines with fixed blade lengths will take longer to reach cut-in wind speed, and at the same time, it will take longer to stop the wind turbine to reach cut-out wind speed

Impact on the safety of wind turbines

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