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Small wind turbine pitch change device

A wind turbine, small technology, applied in wind turbine, wind turbine control, engine and other directions, can solve the problems of poor pitch stability and reliability, poor pitch synchronization, reset impact, etc., to improve the utilization rate, avoid unnecessary Balance and ensure stability

Active Publication Date: 2017-07-21
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These pitch-changing technologies usually require individual pitching of each blade shaft, and the synchronization of pitching is poor. When the wind speed decreases instantaneously, there is no buffer, which is prone to reset impact, and the stability and reliability of pitching are poor.

Method used

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  • Small wind turbine pitch change device
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Embodiment Construction

[0017] The patent of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as figure 1 , 2 As shown, the small wind turbine pitch control device of the present invention mainly includes a driving mechanism, a transmission component, a pitch control component, a return torsion spring 15 , a rotary box 14 , and a hub 21 . The driving mechanism is connected with the transmission assembly through the key 8 connection. The transmission assembly is connected with the pitch assembly through the driving bevel gear 20 and the driven bevel gear 23 . The pitch assembly is fixedly connected with the rotary box 14 through screws 26 . One end of the reset torsion spring 15 is connected with the transmission shaft 16 , and the other end is fixed on the rotary box 14 . The hub 21 is fixedly connected to the revolving box body 14 through bolts 22 .

[0019] The driving mechanism includes 3 driving units,...

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Abstract

The invention provides a small wind turbine pitch change device. The device mainly comprises a driving mechanism, a transmission module, a pitch change module, a return torsion spring, a rotating box body and a hub. The driving mechanism is connected with the transmission module through key connection; the transmission module is connected with the pitch change module through bevel gear transmission; the pitch change module is connected with the rotating box body through a screw; and one end of the return torsion spring is connected with a transmission shaft, and the other end is fixed on the rotating box body. The device achieves a function of flexibly adjusting a pitch angle, increases the utilization rate of wind energy, and improves the pitch change stability and synchronization at the same time.

Description

technical field [0001] The invention relates to a pitch changing device of a small wind power machine, which belongs to the technical field of wind power machines. Background technique [0002] A wind turbine is a device that converts wind energy into electricity. The power of a small horizontal axis fixed-pitch wind turbine varies with wind speed and direction. In recent years, small wind turbine pitch technology has developed rapidly. At present, the methods for controlling the power of small wind turbines are: (1) changing the windward area of ​​the wind rotor by tilting the tail rudder rotor; (2) changing the electrical load for off-grid wind turbines; (3) using friction, etc. Mechanical speed limiting device; (4) Adopt the method of changing blade pitch. Among them, the ways to change the pitch of the blade mainly include the use of servo motor control or hydraulic system drive to achieve pitch change and mechanical pitch change. It is necessary to increase the pitc...

Claims

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Application Information

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IPC IPC(8): F03D7/02
CPCF03D7/0224Y02E10/72
Inventor 唐新姿李鹏程彭锐涛陆鑫宇
Owner XIANGTAN UNIV
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