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Vibration damping system for offshore wind turbine generator and assembling method of vibration damping system

A vibration reduction system and offshore wind power technology, applied in the control of wind turbines, wind power generation, wind turbines, etc., can solve the problems of single energy consumption mechanism, heavy mass, and large displacement amplitude of mass blocks, so as to prolong the service life. Effect

Pending Publication Date: 2021-06-08
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the energy consumption mechanism of the traditional TMD damping system is relatively simple
In addition, as the size and specifications of offshore wind turbines increase, if the traditional TMD system is used, a heavy mass is required to achieve the desired vibration reduction effect, which is not feasible in engineering
At the same time, the displacement amplitude of the mass block in the traditional TMD system is relatively large, and the limited installation space of the wind turbine cannot meet the ideal mass and displacement amplitude requirements of the mass block.

Method used

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  • Vibration damping system for offshore wind turbine generator and assembling method of vibration damping system
  • Vibration damping system for offshore wind turbine generator and assembling method of vibration damping system
  • Vibration damping system for offshore wind turbine generator and assembling method of vibration damping system

Examples

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Effect test

Embodiment 1

[0047] see figure 1 and figure 2 , this embodiment provides a vibration reduction system for offshore wind turbines, including a damper, a mass water tank 10, a slide rail 11, a connecting plate I13 and a connecting plate II130. The slide rail 11 and the connecting plate II 130 are arranged on the nacelle floor 15 of the wind power generating set.

[0048] The inner cavity of the mass water tank 10 is filled with viscous liquid. A connecting plate I13 is arranged on the side wall of the mass water tank 10 . The bottom of the mass water tank 10 has rollers 12 . The mass water tank 10 is arranged on the slide rail 11 through rollers 12 . The mass water tank 10 can move axially along the slide rail 11 .

[0049] see image 3 , Figure 4 , Figure 5 and Figure 6 , the damper includes 4 groups of wedge-shaped friction pairs 1, middle sliding plate 2, piston plate I3, piston plate II30, shape memory alloy gasket 4, high strength bolt 5, horizontal shape memory alloy cable...

Embodiment 2

[0058] see Figure 7 The main structure of this embodiment is the same as that of Embodiment 1, wherein the friction surface of the outer wedge-shaped friction block 101 includes a first quadrangular truss segment, a first straight segment and a second quadrangular truss segment connected one by one. The bottom surfaces of the first quadrangular truss section and the second quadrangular truss section are right-angled trapezoids. The first quadrangular frustum segment forms a first inclined friction surface 1011 and a first planar friction surface 1012 . The first straight section forms the second plane friction surface 1013 . The second truss section forms a second inclined friction surface 1014 and a third flat friction surface 1015 .

[0059] The friction surface of the inner wedge-shaped friction block 102 includes a triangular truss section, a second straight section, a third quadrangular truncated section and a third straight section connected one by one. The bottom su...

Embodiment 3

[0063] The main structure of this embodiment is the same as that of Embodiment 1, wherein the material of the horizontal shape memory alloy cable 6 and the shape memory alloy washer 4 is nickel-titanium shape memory alloy. Nickel-titanium shape memory alloys have superelastic properties. When loading, before the alloy stress reaches the phase transformation stress, the material is in the austenite state, undergoes elastic deformation, and has high rigidity. When the stress of the alloy reaches the critical stress, the shape memory alloy undergoes a martensitic phase transformation, the stiffness rapidly decays, and enters the "yield" stage equivalent to steel. When the alloy stress reaches the end stress of the positive martensitic transformation, the alloy changes completely from austenite to martensite. After unloading, the alloy undergoes a reverse phase transformation from martensite to austenite. When the load is zero, the alloy only produces a small residual deformation...

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Abstract

The invention provides a vibration damping system for an offshore wind turbine generator and an assembling method of the vibration damping system. The vibration damping system comprises a damper, a mass water tank, a sliding rail and a connecting plate II, wherein the sliding rail and the connecting plate II are arranged on a cabin bottom plate of wind turbine generator. The vibration damping system has multiple energy consumption mechanisms. The mass water tank can reciprocate along the direction of the sliding rail. In the sliding process of a middle sliding plate, the damper absorbs and consumes energy input into the system through friction of a friction pair and metal phase change of shape memory alloy, and thus the energy dissipation rate is effectively improved. The damper provides enough rigidity for the system, so that the horizontal vibration of the unit is effectively reduced, the motion amplitude of the mass water tank is reduced, and the occupied space of the system in a cabin is reduced. The vibration damping system can restore to an initial position under the restoring force effect of a horizontal shape memory alloy inhaul cable, and a stiffness system and a damping system in a traditional TMD are combined into a whole.

Description

technical field [0001] The invention relates to the technical field of engineering vibration reduction, in particular to a vibration reduction system for offshore wind turbines and an assembly method thereof. Background technique [0002] Compared with other traditional energy sources, wind energy has attracted increasing attention due to its clean and renewable advantages. With the continuous development and utilization of offshore wind energy resources, offshore wind turbines are in a stage of rapid development. At the same time, the adverse effects of offshore wind turbines on the performance and service life of the units under the action of external loads such as wind waves and earthquakes and the vibration problems during the working process are gradually exposed. [0003] Effectively reducing the vibration of offshore wind turbines is an urgent problem to be solved in the development of offshore wind power technology. The widely used vibration control method is to ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02F03D80/80F03D80/00F16F15/02
CPCF03D7/0296F03D80/00F03D80/80F16F15/02Y02E10/72
Inventor 柯珂刘思佳周绪红王宇航张萍
Owner CHONGQING UNIV
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