Wind driven generator and variable-pitch system thereof

Abstract

The invention provides a wind driven generator and a variable-pitch system thereof. The variable-pitch system comprises a hydraulic cylinder, a hydraulic control reversing valve and a control device. The control device comprises a quality component, a piston, a second piston rod and a spring. The second piston rod is connected with the quality component and a first end of the piston, the spring is disposed at a second end of the piston, a part of the second piston rod, the piston and the spring are disposed in a first tank, hydraulic oil is fully filled in the first tank, a spring cavity of the first tank is provided with a first oil port while a springless cavity of the first tank is provided with a second oil port, and the first oil port and the second oil port are respectively connected with a control oil port of the hydraulic control reversing valve so as to control reversing of the hydraulic control reversing valve. The wind driven generator and the variable-pitch system thereof have the advantages of easiness in installation and debugging, small system impact, fast response speed, high reliability and the like.

Description

technical field [0001] The present invention mainly relates to the field of wind power, in particular to a wind power generator pitch system and a wind power generator including the pitch system. Background technique [0002] Wind power generation is a power generation method that converts the wind energy captured within the windward swept area of ​​the fan blades into electrical energy. In the process of wind power generation, the angle between the windward surface of the wind rotor blade and the wind speed directly affects the absorption of wind energy by the fan, and the absorption is the highest when the angle reaches a certain value. In order to make the wind rotor have the best absorption rate at low wind speeds, not absorb wind energy exceeding the capacity of the generator at high wind speeds and prevent flying cars, those skilled in the art particularly need a wind turbine pitch system, through which the pitch system can change Blades are angled to suit different w...

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Problems solved by technology

[0004] However, due to the calculation of the pitch angle, various physical factors such as the airfoil, length, and installation inclination angle of the blade need to be considered, and at the same time, the change of wind speed and direction is also unpredictable, and in order to meet the rapid response requirements of the pitch system, so make program design very complex

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