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Wind driven generator and vibration control method for transmission system of wind driven generator

A wind turbine and transmission system technology, applied in the control of wind turbines, wind turbines, wind power generation, etc., can solve problems such as load fluctuations, elastic support damage of units, etc.

Active Publication Date: 2018-01-30
JIAXING NANYANG POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a vibration control method for a wind power generator and a wind power generator transmission system that can actively change the support effect of the transmission system, and solves the premature elastic support of the unit caused by the load fluctuation and complex wind conditions of the existing wind power generator. damage problem

Method used

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  • Wind driven generator and vibration control method for transmission system of wind driven generator
  • Wind driven generator and vibration control method for transmission system of wind driven generator
  • Wind driven generator and vibration control method for transmission system of wind driven generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment one, see figure 1 , a wind generator comprising a column 1 and a nacelle 7 . The nacelle 7 is connected to the upper end of the column 1 through the yaw braking system 2 . In the engine room 7, a generator 74 (see Figure 5 ), temperature sensor 71, auxiliary hydraulic device 72, control system 73 and transmission system 79 (such as a gearbox). The rotating shaft 741 of the generator is connected with the rotating shaft of the fan blade 78 through the transmission system 79 . Wind vanes 78 are located outside the nacelle. The auxiliary hydraulic device is the structure of the existing hydraulic station, and the transmission system 79 is supported in the engine room by the hydraulic elastic support 75 to realize vibration reduction. The hydraulic elastic support 75 includes a left mounting frame 751 , a left connecting seat 752 , a right supporting frame 753 and a right connecting seat 754 . One end of the left connection seat 752 is connected together wi...

Embodiment 2

[0034] Embodiment two, see figure 2 , The yaw brake system includes a yaw bearing 12, a yaw brake disc 22 arranged on the yaw bearing and several brakes 3. There are 6 brakes 3. Three of the six brakes 3 are arranged on the right side of the brake disc 2 , and the other three brakes 3 are arranged on the left side of the brake disc 2 . Above is the same as embodiment one, is prior art, and difference is:

[0035] The brake 3 includes a hydraulic brake mechanism 31 and a spring brake mechanism 32 . The hydraulic brake mechanism 31 is provided with an online oil leakage detection mechanism 4 .

[0036] see image 3 , The hydraulic braking mechanism 31 includes a hydraulic cylinder 311 , a piston 312 and a first friction plate 313 . One end of the piston 312 is sealingly connected in the hydraulic cylinder 311 through the first seal ring 314 , and the other end is connected with the first friction plate and 313 . The first sealing ring 314 is fixedly connected with the hyd...

Embodiment 3

[0042] Embodiment three, the difference with embodiment one is:

[0043] see Figure 4 , The hydraulic braking mechanism 31 is also provided with a selective sealing structure 5 . The selective sealing structure 5 includes a second sealing ring 51 and a gas source 52 . The second sealing ring 51 is an inflatable sealing ring. The second sealing ring 51 is sleeved on the piston 312 . The second sealing ring 51 is fixed together with the hydraulic cylinder 311 . Air source 52 is compressed air. The gas source 52 communicates with the second sealing ring 51 through a pipeline 53 . An electric valve 54 is provided on the pipeline 53 . The selective sealing structure 5 also includes a control unit electrically connected with the oil sensor. The annular oil groove 41 is located between the first sealing ring 314 and the second sealing ring 51 . In the initial state, the second sealing ring 51 is in a collapsed state, that is, the second sealing ring 51 does not seal the pist...

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Abstract

The invention relates to the technical field of wind power generation. A wind driven generator comprises fan blades, an upright column and a cabin which is connected to the upright column, an electricgenerator and a transmission system are arranged in the cabin, the fan blades drive the electric generator through the transmission system, and the transmission system is supported in the cabin through a hydraulic elastic support. A displacement sensor used for detecting the deformation displacement of the hydraulic elastic support, a pressure sensor used for detecting the pressure value of the hydraulic elastic support, a temperature sensor for detecting the temperature of cabin, an auxiliary hydraulic device used for adjusting the pressure value of the hydraulic elastic support and a control system are arranged in the cabin. By means of the wind driven generator and a vibration control method for the transmission system of the wind driven generator, the supporting effect of the transmission system can be actively changed, and the problems that in an existing wind driven generator, the elastic support of a unit is prematurely damaged due to load fluctuation, complex wind conditions and the like are solved.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a wind power generator and a vibration control method for a rotating shaft of the wind power generator. Background technique [0002] At present, with the development of the wind power industry, large-megawatt wind turbines have gradually become the mainstream models in the market. The wind turbines drive the generator through the transmission system when the blades are used. The existing transmission system generally adopts hydraulic elastic support for support. and vibration reduction, while the current general-purpose hydraulic elastic support is only a passive vibration reduction device. Under these conditions, the deformation of the hydraulic elastic support is too large and the vibration reduction effect is poor, causing premature damage to the elastic support, damage to the coupling, and torsional vibration of the transmission system, which has brought seriou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/04F03D80/00F03D7/02F16D55/22F16D65/14F16D66/00F16F15/027F16D121/04
CPCY02E10/72
Inventor 王记彩余健刘若竹沈斌
Owner JIAXING NANYANG POLYTECHNIC INST