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Yaw brake hydraulic system of wind driven generator

A hydraulic system, yaw technology, applied in wind turbines, wind turbine control, wind power generation and other directions, can solve the problem of uneven braking force

Inactive Publication Date: 2014-03-26
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is to provide a hydraulic system yaw for wind power generation, so that the hydraulic control system can achieve normal and stable yaw braking of the hydraulic control system while reducing energy consumption and improving work efficiency, thereby overcoming Faults in the hydraulic system or uneven braking force in the prior art

Method used

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  • Yaw brake hydraulic system of wind driven generator

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Effect test

Embodiment Construction

[0012] The present invention will be further described below in conjunction with specific embodiment:

[0013] The oil cylinder group (1) is made up of six oil cylinders connected by series pipelines;

[0014] The throttle valve (13) ensures that the flow speed of the hydraulic oil in the hydraulic pipeline is balanced, which makes the oil cylinder group (1) move smoothly when pushing the piston rod out, thereby ensuring the stability of the hydraulic system when yaw braking.

[0015] There is a pressure sensor (12) in the hydraulic line,

[0016] Among them, the yaw braking unit includes a hydraulic pump (2), an oil filter (3), a one-way valve (15), a throttle valve (14), a two-position two-way electromagnetic reversing valve (6), an accumulator ( 7), oil cylinder group (1), etc., wherein there is a pressure feedback device in front of the accumulator (7), which is connected with the main oil circuit.

[0017] When yaw braking is required, the first reversing valve (6) and ...

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Abstract

When a hydraulic system of a yaw brake device brakes, the hydraulic system often breaks down due to too high pressure of hydraulic oil in a hydraulic system pipeline, or brake force is too large or too small due to the uneven rate of hydraulic oil communicated to a brake oil cylinder. The invention aims to provide a yaw brake hydraulic system which can make yaw brake of a hydraulic control system normal and stable under the conditions that working energy consumption of the hydraulic control system is reduced and working efficiency of the hydraulic control system is improved in the yaw process of a hydraulic system of a wind driven generator, and then to overcome the defects that in the prior art, the hydraulic system breaks down or the brake force is uneven. The yaw brake hydraulic system comprises an oil pump (2) and an energy accumulator (7) connected with an oil pump pipeline. An oil cylinder set (1) is connected to the pipeline in series. A first reversing valve (6), a second reversing valve (5), a third reversing valve (4), a first overflow valve (9) and a second overflow valve (8) are arranged on the pipeline. The oil cylinder set (1) is formed by connecting seven oil cylinders in series.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a spindle brake and yaw brake device of a hydraulic system for wind power generation. Background technique [0002] Wind power generation converts energy through the wind power generation system, intercepts the kinetic energy of the flowing air, and converts a part of the kinetic energy of the air within the area swept by the wind turbine blades into useful mechanical energy, and then converts the mechanical energy into electrical energy. When the energy of the battery of the wind turbine is saturated or the wind turbine needs maintenance, it is necessary to stop the blades from rotating. Due to the very large torque during the movement of the wind turbine, it is difficult to brake and lock the high-speed main shaft of the wind turbine by the usual braking method. [0003] The hydraulic braking device of the wind turbine mainly includes a main shaft bra...

Claims

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Application Information

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IPC IPC(8): F03D7/00F15B1/02F15B13/02
CPCY02E10/72
Inventor 闫利文苏彬谢辉王小静张健史思亮艾存金
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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