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Leeward type wind turbine

A technology of wind turbines and wind wheels, applied in the direction of wind engines, wind engines consistent with the wind direction, wind engine control, etc., to achieve the effect of reducing the cost of blades and the whole machine, and improving the yaw control performance

Pending Publication Date: 2020-05-19
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these designs cannot support wind turbines reaching the 20MW level, and innovative designs must be carried out

Method used

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  • Leeward type wind turbine
  • Leeward type wind turbine
  • Leeward type wind turbine

Examples

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Embodiment Construction

[0024] The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0025] A leeward wind turbine, comprising a wind wheel 1 and a wind wheel rotation mechanism, the wind wheel 1 includes several blades 1-1, the inner ends of the several blades 1-1 are fixedly connected to the upper end of the wind wheel rotation mechanism, and the several blades 1-1 1 are circularly distributed around the wind rotor rotating mechanism, and the vertical cross section of the wind rotor 1 presents an M shape when the wind is still. In the prior art, there is a V-shaped cone-angle wind rotor, but the biggest feature of the wind rotor 1 of the present invention is that it is M-shaped when stationary, and the wind rotor 1 will gradually deform as the wind speed increases.

[0026] Further, the wind wheel rotation mechanism includes a hub 2, a nacelle 3 and a tower 4, the inner ends ...

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Abstract

The invention discloses a leeward type wind turbine. A wind wheel (1) comprises a plurality of blades (1-1). The inner ends of the blades (1-1) are fixedly connected to the upper end of a wind wheel rotating mechanism. The blades (1-1) are annularly distributed around the wind wheel rotating mechanism. When the wind is still, the vertical cross section of the wind wheel (1) is in an M shape. The leeward type wind wheel configuration is not limited by the tower interference, so that the blades can be designed to be more flexible than the windward configuration; and meanwhile the leeward type M-shaped wind wheel deforms automatically as the wind speed is increased, so that the blades are in the tension stress state as much as possible in a section of wind speed range near the rated power, the material strength of the blades is fully exerted, the blades are designed to be more flexible and lighter, and the cost of the blades and the whole machine is further reduced. The leeward type windwheel can be automatically aligned with the incoming flow by virtue of the reset yaw moment of the wind wheel, is generally better in yaw control performance compared with the windward type and is also more applicable to ultra-large wind turbines under extreme weather conditions.

Description

technical field [0001] The invention relates to a leeward wind turbine, which belongs to the technical field of wind turbines with a leeward M-shaped wind wheel. Background technique [0002] Wind energy is an important component of renewable energy. Since the 1870s, the number of installed wind turbines has increased rapidly. The size of wind turbines has increased significantly. As the installed capacity of onshore wind power in high wind speed areas tends to be saturated, the development of low wind speed wind farms and distributed wind power is a recent hot spot in the wind power industry. One of the distinguishing features of low wind speed wind turbines is that they have longer blades to increase the swept area. At the same time, offshore wind power is also developing rapidly. The urgent need to reduce the Cost of Energy of offshore wind energy drives the length of wind turbine blades to increase. The above two scenarios are the epitome of the industry demand for t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06F03D7/02
CPCF03D1/0625F03D1/0641F03D7/0204F05B2240/31Y02E10/72
Inventor 孙振业朱卫军陶秋晗李迺路杨华曹九发陈东阳
Owner YANGZHOU UNIV
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