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A small wind turbine pitch device

A wind turbine and small-scale technology, which is applied in wind turbines, wind turbine control, engines, etc., can solve the problems of poor pitch stability and reliability, poor pitch synchronization, reset impact, etc., to improve utilization and avoid The effect of balancing and ensuring stability

Active Publication Date: 2019-04-19
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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  • A small wind turbine pitch device
  • A small wind turbine pitch 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] like figure 1 , 2 As shown, the small wind turbine pitch device of the present invention mainly includes a drive mechanism, a transmission assembly, a pitch assembly, a return torsion spring 15 , a rotating box 14 , and a hub 21 . The drive mechanism is connected to the transmission assembly through a key 8 coupling. 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 to the slewing box 14 through screws 26 . One end of the return torsion spring 15 is connected with the transmission shaft 16 , and the other end is fixed on the rotating box body 14 . The wheel hub 21 is fixedly connected to the rotary casing 14 through bolts 22 .

[0019] The drive mechanism includes 3 drive units, and each drive unit is e...

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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 small wind turbine pitch device, belonging to the technical field of wind turbines. Background technique [0002] A wind turbine is a device that converts wind energy into electrical energy. The power of small horizontal-axis fixed-pitch wind turbines varies with wind speed and direction. In recent years, the pitch technology of small wind turbines has developed rapidly. At present, the power control methods of small wind turbines include: (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) The method of changing the blade pitch is adopted. Among them, the main methods of changing the blade pitch are the use of servo motor control or hydraulic system drive to achieve pitch and mechanical pitch. An additional pitching method of the drive system is required, which is co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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