A Composite Nested Piezoelectric Damper for Floating Offshore Wind Turbines

A wind turbine and composite technology, applied in wind turbine combination, wind turbine, wind power generation and other directions, can solve the problems of weak vibration control ability, low energy utilization rate, limited vibration reduction ability, etc. The effect of improving the efficiency of vibration reduction and energy consumption and improving the efficiency of energy utilization

Active Publication Date: 2020-11-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing dampers have obvious defects: (1) the ability to damp vibration in the vertical third dimension is limited; (2) the mechanical energy of vibration is dissipated through thermal energy, plastic deformation energy, etc., and the vibration control ability is weak and the energy low utilization

Method used

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  • A Composite Nested Piezoelectric Damper for Floating Offshore Wind Turbines
  • A Composite Nested Piezoelectric Damper for Floating Offshore Wind Turbines
  • A Composite Nested Piezoelectric Damper for Floating Offshore Wind Turbines

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Embodiment

[0028] Such as Figure 1~3 As shown, a composite nested piezoelectric damper for floating offshore wind power generator 14 includes multi-layer nested spherical cavities. In this embodiment, three layers of spherical cavities are provided, respectively the outermost Layer spherical cavity 5, middle spherical cavity 6 and innermost spherical cavity 7.

[0029] Each spherical cavity is filled with liquid 10 and air is left inside. The volume of liquid 10 inside each spherical cavity accounts for more than 2 / 3 of the volume of the spherical cavity. At this height, the liquid 10 can shake normally and produce large The specific ratio can be determined through calculation and numerical simulation according to the site conditions.

[0030] The inner wall of the outermost spherical cavity 5 and the inner and outer walls of the remaining spherical cavities are respectively provided with piezoelectric ceramic sheets 2 , and the innermost spherical cavity 7 is also provided with energy...

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Abstract

The invention relates to a combined type nested piezoelectric damper for a floating type offshore wind turbine. The combined type nested piezoelectric damper comprises multi-layer nested ball-shaped cavities, wherein each ball-shaped cavity is internally filled with liquid (10) and air is reserved within; the inner wall of the outermost layer of ball-shaped cavity (5) and the inner and outer wallsof the remaining ball-shaped cavities are provided with piezoelectric ceramic sheets (2) correspondingly, and the innermost layer of ball-shaped cavity (7) is further internally provided with energyconsumption steel balls (4); and adjacent ball-shaped cavities are fixedly connected through a first elastic energy consumption assembly, and the outermost layer of ball-shaped cavity (5) is connectedwith the inner wall of a wind turbine (14) through a second elastic energy consumption assembly. Compared with the prior art, the combined type nested piezoelectric damper for the floating type offshore wind turbine has a plurality of energy consumption mechanisms, so that energy consumption effects are good, originally dissipated energy can be utilized, and accordingly the energy utilization rate is improved.

Description

technical field [0001] The invention relates to a piezoelectric damper, in particular to a composite nested piezoelectric damper used for a floating offshore wind power generator. Background technique [0002] As a clean and renewable energy, wind energy is becoming an important research direction in the world today. Compared with fixed offshore wind turbines, floating offshore wind turbines can get rid of the shackles of different seabed conditions, have good maneuverability, and have higher wind energy utilization. Therefore, in recent years, the industry has paid more and more attention to offshore floating wind power technology. Offshore power plants in Portugal, Scotland and other regions have been completed and put into use. At the same time, the problems caused by the vibration of floating offshore generators due to the load have also aroused widespread attention. How to reduce the vibration of the structure more simply, economically and efficiently in the offshore ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/00F16F15/08F16F15/04F16F15/023F03D9/25
CPCF03D9/25F05B2220/709F16F15/007F16F15/023F16F15/04F16F15/08Y02E10/72
Inventor 鲁正欧阳辉殷峥琪何智亮
Owner TONGJI UNIV
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