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Multilayer spherical container damper

A technology of dampers and containers, applied in springs/shock absorbers, engines, wind power generation, etc., can solve the problems of dissipating vibration energy and uneconomical

Inactive Publication Date: 2014-02-05
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the method of increasing the stiffness of the structure itself is used to dissipate the vibration energy by using its own ability, such as increasing the cross-sectional size of the component or increasing the strength level of the material, this method is not economical and has major problems

Method used

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Examples

Experimental program
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Embodiment 1

[0017] Embodiment 1: The present invention is a multi-layer spherical container damper suitable for wind power generation towers. In actual use, first determine the placement position of the damper according to the available space inside the cabin and platform, so as to determine the choice Figure 1~Figure 4 The damper type shown. The dynamic characteristics of the wind power tower to be installed with dampers are tested to determine its first-order natural frequency. Since the damping effect is the best when the natural frequency of the damper is almost equal to the first-order natural frequency of the wind power tower, the rolling frequency of the rolling ball or the oscillation frequency of the liquid in the damper is determined accordingly. According to the expected vibration reduction effect, when the rolling ball or liquid mass is taken as 1.5%~2.5% of the first-order modal mass of the wind power tower, the vibration reduction effect can reach 20%~30%. In order to ens...

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Abstract

The invention relates to a multilayer spherical container damper which consists of a fixing support, steel balls, liquid, containers and bolts. The containers are spherical containers, a plurality of containers are sequentially placed on the fixing support from top to bottom, the containers contain any one or all of the steel balls or liquid, and the fixing support is fixed above the multilayer spherical container damper through the screws. The rolling frequency of the steel balls in the containers depends on the container radius and the steel ball radius, the oscillation frequency of the liquid in the containers depends on the liquid level height and the container radius, the masses of the steel balls and the liquid depend on the expected damping effect and are 1.5%-2.5% of first-order modal mass of a wind power generating tower. When the steel ball rolling frequency or the liquid oscillation frequency is almost completely consistent with the natural vibration frequency of the damper, the control effect is good, and therefore the spherical container radius, the steel ball radius and the liquid level height are determined. The multilayer spherical container damper is simple in structure and novel in concept.

Description

technical field [0001] The invention belongs to the technical field of structural engineering, and in particular relates to a multilayer spherical container damper. Background technique [0002] With the increasing consumption of natural resources, energy issues have become a huge challenge faced by all countries in the world. However, there are abundant wind energy resources and vast flat areas in the sea, making wind power technology a hot spot in research and application in recent years. In order to obtain greater power production capacity, the power of a single unit of offshore wind turbines continues to increase, and the size and weight of the wind turbines have increased significantly. In order to lift the nacelle and impeller and other components to the design height for operation, a higher support tower is required. However, compared with onshore wind power generation, offshore wind power towers not only have to bear strong wind loads, but also are affected by waves...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F15/02F16F15/023F03D11/00
CPCY02E10/722
Inventor 陈俊岭
Owner TONGJI UNIV
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