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Wind power generation system

A technology for wind power generation systems and generators, which is applied to wind power generation, wind turbines, wind turbine combinations, etc., can solve the problems of slow rotor speed, large absolute length of efficient blade segments, processing of ultra-long blades, and increased manufacturing difficulty. , to achieve the effects of good system safety, high wind energy utilization efficiency, and improved start-up and low wind speed performance

Inactive Publication Date: 2008-10-22
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

The processing and manufacturing of ultra-long blades is more difficult and the cost is increasing day by day; the transportation of ultra-long blades has become a bottleneck problem; the problems of aerodynamic deformation and flutter of ultra-long blades are becoming more and more prominent, which brings great hidden dangers to the safety of blades; Turbine design requires the rotor to work near the optimum tip speed ratio. As the blades become longer, the rotor speed becomes slower and slower, making the absolute length of the low-efficiency blade segments located in the small radius area larger and larger

Method used

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Embodiment Construction

[0021] In order to solve the problems existing in the current wind power generation device, the wind power generation system of the present invention has announced a double-rotor wind turbine structure with brackets, which can simultaneously solve the processing, manufacturing and transportation problems of super long blades; The beam structure can improve the strength of the blade and reduce deformation and flutter; the bracket beam structure, the blade can be properly kept away from the tower, and the possibility of the blade hitting the tower is solved; the large and small rotors have different circumferential speeds, and the small rotor has a high speed, which can Make the small rotor have the same tip speed as the large rotor, improve the working efficiency of the blade in the small radius area, and thus greatly reduce the chord length and weight of the blade.

[0022] The present invention will be further described in detail below in conjunction with the accompanying draw...

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Abstract

The invention provides a wind power generation system, relating to the wind power generation technology, which can be used in a commercial wind power generation system with a large horizontal shaft rotor. The wind power generation system comprises dual rotors; shafts of the dual rotors are respectively fixedly connected with a big vane and a small vane which are positioned on two axial ends of a generator respectively; and a rod-shaped support girder has an upper end connected with the root part of the rotating shaft of the big vane close to an engine room through an interconnecting piece in a rotatable connection and a lower end fixedly connected with the movable part of the upper part of a tower scaffold through a fixing component. The wind power generation system has the advantages of high wind power utilization efficiency, good system security and improvement of starting and low wind speed performance, and accords with developing tendency of large size of modern wind turbines.

Description

technical field [0001] The invention relates to the technical field of wind power generation, more specifically, to a large-scale wind power generation system with a horizontal axis rotor. Background technique [0002] Modern wind power generation devices are developing towards large scale, and the blades are getting longer and longer, which brings a series of problems accordingly. The processing and manufacturing of ultra-long blades is more difficult and the cost is increasing day by day; the transportation of ultra-long blades has become a bottleneck problem; the problems of aerodynamic deformation and flutter of ultra-long blades are becoming more and more prominent, which brings great hidden dangers to the safety of blades; Turbine design requires the rotor to work near the optimum tip speed ratio. Due to the elongation of the blades, the rotor speed becomes slower and slower, which makes the absolute length of the low-efficiency blade segments located in the small radi...

Claims

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Application Information

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IPC IPC(8): F03D9/00F03D1/06H02K7/18F03D9/25
CPCY02E10/721Y02E10/72
Inventor 张冬阳谭春青王会社刘建军孙志刚张新敬
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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