Variable pitch system of hydrodynamic transmission wind driven generator

A technology for wind turbines and pitch systems, which is applied to wind turbines, wind turbine control, and wind power generation, etc., can solve problems such as complex structures and inability to feather the blades of wind turbines.

Active Publication Date: 2021-10-29
马旭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Variable pitch system of hydrodynamic transmission wind driven generator
  • Variable pitch system of hydrodynamic transmission wind driven generator
  • Variable pitch system of hydrodynamic transmission wind driven generator

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Experimental program
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Effect test

Embodiment

[0036] See attached Figure 1-3 It is a schematic diagram of the overall and partial structure of an embodiment of the present invention. The present invention specifically discloses a hydraulic drive wind generator pitch system. The wind generator includes a wind generator nacelle 902, a wind generator shroud 903, Propeller electrical control cabinet 905, wind turbine tower 906, pitch drive wheel 907, wind generator hub 904 and a plurality of wind generator unit blades 901 installed on the wind generator hub 904, the system includes The hydraulic spring energy storage device 101, the hydraulic control device and the electric pitch control system with the same number of blades 901 of the unit,

[0037] The hydraulic spring energy storage device 101 is installed on the hub 904 of the corresponding wind power generator, and includes a cylindrical cylinder 104 closed with end caps at both ends, a spring 102 and a sliding connection in the cylindrical cylinder 104 to divide it int...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): F03D7/02F03D7/04
CPCF03D7/0224F03D7/042F05B2270/604Y02E10/72
Inventor 马旭裴旭兵朱振海曹挺渊岳金鑫杨红强史玉蓉杨彬杨筱
Owner 马旭
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