Variable pitch system of hydrodynamic transmission wind driven generator

Abstract

The invention discloses a variable pitch system of a hydrodynamic transmission wind driven generator. The variable pitch system comprises hydraulic spring energy storage devices, a hydraulic control device and a variable pitch electric control system, wherein the number of the hydraulic spring energy storage devices is equal to that of blades of a wind driven generator unit. The hydraulic control device comprises a hydraulic pump, a one-way valve, a three-position four-way proportional flow valve, a hydraulic motor, an emergency feathering electromagnetic valve and an emergency emptying electromagnetic valve. The variable pitch electric control system is electrically connected with an in-cylinder pressure sensor, an out-cylinder pressure sensor, a hydraulic pump, the three-position four-way proportional flow valve, the emergency feathering electromagnetic valve and the emergency emptying electromagnetic valve. According to the blades of the wind driven generator unit, reliable variable pitch can be achieved; when the wind driven generator unit breaks down, blades of the wind driven generator unit can be feathered quickly, and operation safety of the wind driven generator is guaranteed; and the variable pitch electric control system is matched with the hydraulic control device for application, so that reliable variable pitch of the blades of the wind driven generator unit can be guaranteed, and meanwhile, a response can be made in time when a fault occurs.

Description

technical field [0001] The present invention relates to the field of wind power generating equipment, and more specifically relates to a pitch-changing system of a hydraulic transmission wind power generator. Background technique [0002] The wind turbine pitch system is to change the blade pitch angle of the wind turbine unit to change the blade angle of attack to cater to the change of wind speed, and then change the overall aerodynamic performance of the blade after deflection, so that the fan can achieve the best effect on the use of wind energy . The wind turbine adjusts the pitch angle of the blades according to the wind speed to ensure that the unit can maintain a certain power output. [0003] Most of the blades of the existing wind turbines are driven by hydraulic mechanisms, but the structure of the existing hydraulic pitch system is complex, and when the wind turbine fails, the blades of the wind turbine cannot Feathering in time has a greater safety risk. [0...

AI Technical Summary

Problems solved by technology

[0003] Most of the blades of the existing wind turbines are driven by hydraulic mechanisms, but the structure of the existing hydraulic pitch system is complex, and when the wind turbine fails, the blades of the wind turbine cannot Timely feathering, there is a greater safety risk

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