Large horizontal shaft wind turbine transmission chain and flexible design method thereof
A wind turbine and horizontal axis technology, applied in the field of large-scale horizontal axis wind turbine transmission chain and its flexible design, can solve the problems of wear of the transmission shaft and gear box, stimulate torsional vibration of the transmission chain, etc., and achieve the effect of reducing damage
Inactive Publication Date: 2015-02-25
SHANTOU UNIV
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Problems solved by technology
The random fluctuation of the wind and the effect of wind shear and tower shadow will excite the torsional vibration of the transmission chain, causing the wear of the transmission shaft and the gearbox
Method used
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[0040] The present invention will be further described below in conjunction with the accompanying drawings.
[0041] The structure of the present invention is as figure 1 As shown, it includes a gearbox 1 and a wind wheel rotor 2 connected in sequence, a low-speed shaft 3, a planetary gear, a first gear shaft 7, a first tooth 8 wheel, a second gear 9, a second gear shaft 10, and a third gear 11 , the fourth gear 12, the high speed shaft 13 and the generator rotor 14. The planetary gear includes a planetary carrier 4, a sun gear 6 and three planetary gears 5, the planetary carrier 4 is connected to the low-speed shaft 3, the sun gear 6 is connected to the first gear shaft 7, and the three planetary gears 5 are all arranged in the gearbox 1 Between the ring gear 15 and the sun gear 6. A gear box support 16 is arranged below the gear box 1 .
[0042] Since the moment of inertia of the wind wheel is much greater than that of the low-speed shaft, the moment of inertia of the gen...
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The invention relates to the technical field of wind turbines, in particular to a large horizontal shaft wind turbine transmission chain and a flexible design method thereof. The wind turbine transmission chain comprises a gearbox, a wind wheel rotor, a low-speed shaft, a planetary gear, a first gear shaft, a first gear, a second gear, a second gear shaft, a third gear, a fourth gear, a high-speed shaft and a generator rotor, wherein the wind wheel rotor, the low-speed shaft, the planetary gear, the first gear shaft, the first gear, the second gear, the second gear shaft, the third gear, the fourth gear, the high-speed shaft and the generator rotor are sequentially connected. The design method comprises the steps that 1, a twelve-degree-of-freedom kinetic model of a transmission system is built; 2, structure optimization is carried out on the transmission system; 3, a modal analysis method is used for analyzing the inherent frequency and the modal shape of the system; 4, according to the GL standards, typical complex working conditions are selected for carrying out digital simulation on a wind turbine, and the vibration performance of all working states of the flexibly-designed wind turbine is analyzed. After the flexible parameters of the transmission system are optimized, vibrations of the high-speed shaft and the low-speed shaft and vibration inside the gearbox are reduced, and the damage caused by torsional vibration on the transmission system can be also reduced.
Description
technical field [0001] The invention relates to the technical field of wind turbines, in particular to a transmission chain of a large horizontal axis wind turbine and a flexible design method thereof. Background technique [0002] Wind energy is a clean and renewable energy that can replace some fossil energy to reduce carbon dioxide emissions, play an important role in the prevention and control of air pollution and modernization, and also provide a guarantee for the sustainable supply of energy, so More and more countries in the world pay attention to it, and wind energy is expected to become a clean and non-polluting renewable energy that will be developed and utilized on a large scale in the future. [0003] In recent years, as the cost of wind power generation continues to decrease, the capacity of a single wind turbine has continued to increase, and the load on the mechanical transmission chain of the wind turbine has increased significantly. Due to the random fluctu...
Claims
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IPC IPC(8): G06F17/50
Inventor 郑黎明曾德灿关锡恩陈严
Owner SHANTOU UNIV