Leeward type wind driven generator
A technology for wind turbines and generator cabins, which is applied to wind turbines, wind turbines consistent with the wind direction, and wind power generation, etc., can solve the problems of reducing the sweep area of the wind rotor, affecting the dynamic stiffness of the system, and wind energy absorption losses, etc. Achieve the effect of reducing weight, improving stress state and improving stability
Pending Publication Date: 2021-09-07
宁波爱思信息技术有限公司
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Problems solved by technology
However, in order to ensure that the blades will not hit the tower when the wind turbine is running, there is a limitation on the distance between the blade tip and the tower in the upwind structure, and the method of tilting the main shaft upward by 3-5° is usually used to pull the ends of the blades apart. In this way, the swept area of the wind rotor will be reduced, resulting in a certain loss of wind energy absorption; in addition, the upwind-type nacelle cannot automatically yaw and face the wind with the change of the wind direction, and an additional A set of yaw-winding device and system not only has high cost, but also increases the weight of the nacelle, affecting the dynamic stiffness of the system
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[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention , but not to limit the scope of the present invention.
[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, ...
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The invention discloses a leeward type wind driven generator which comprises a base, a tower frame and a pre-tensioning piece. A rotary platform is rotationally connected to the base. The lower end of the tower frame is connected to the rotary platform. A generator cabin is arranged at the upper end of the tower frame, a plurality of blades are rotationally connected to the generator cabin through a hub, and the blades are located on the leeward side of the tower frame. One end of the pre-tensioning piece is connected to the tower frame, and the other end of the pre-tensioning piece is connected to the rotary platform. The two ends of the pre-tensioning piece are connected to the tower and the rotary platform correspondingly, certain pre-tensioning force is applied to the pre-tensioning piece, the stress state of the section of the tower frame under the wind load effect can be improved, the tension generated by the pre-tensioning piece can offset part of the bending moment of wind force to the tower frame, the load of the tower frame is reduced, the weight of the tower frame is reduced, the stability of the tower frame is improved, and therefore rigidity and strength of the whole structure of the wind driven generator are improved.
Description
technical field [0001] The invention belongs to the field of wind power generators, in particular, relates to a leeward wind power generator, Background technique [0002] At present, the high-power horizontal axis wind turbines mainly adopt the upwind type, that is, the structure with blades in front of the tower, which will not be affected by the turbulent area behind the tower. However, in order to ensure that the blades will not hit the tower when the wind turbine is running, there is a limitation on the distance between the blade tip and the tower in the upwind structure, and the method of tilting the main shaft upward by 3-5° is usually used to pull the ends of the blades apart. In this way, the swept area of the wind rotor will be reduced, resulting in a certain loss of wind energy absorption; in addition, the upwind-type nacelle cannot automatically yaw and face the wind with the change of the wind direction, and an additional A set of yaw-winding device and syste...
Claims
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IPC IPC(8): F03D1/06F03D13/20F03D80/00
CPCF03D1/0675F03D1/0633F03D13/20F03D80/00Y02E10/728Y02E10/72
Inventor 李文龙梁涛
Owner 宁波爱思信息技术有限公司