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Broadband suspended energy harvester

An energy harvester and overhanging technology, which is applied in the direction of controlling mechanical energy, electrical components, and electromechanical devices, can solve the problems that the online monitoring technology of wind turbine blades has not been widely used and cannot meet production needs, and achieve high reliability and power generation. The effect of strong power supply capacity and effective frequency bandwidth

Active Publication Date: 2017-11-21
ZHEJIANG NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increasing length of wind turbine blades and the overall number of wind turbines, the previous method of relying on manual regular inspection and maintenance can no longer meet production needs
Therefore, various forms of wind turbine blade health monitoring methods and corresponding self-power supply devices have been proposed. However, due to the constraints of existing self-power supply device reliability and power generation, the online monitoring technology of wind turbine blades has not yet been developed. widely used

Method used

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  • Broadband suspended energy harvester
  • Broadband suspended energy harvester
  • Broadband suspended energy harvester

Examples

Experimental program
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Effect test

Embodiment Construction

[0011] The blade Y of the wind turbine is installed on the main shaft Z of the generator; one end of the shaft a is mounted on the blade Y of the wind turbine through screws, and the cam a1 is arranged at intervals on the shaft a, and the contour curve of the cam a1 consists of two long arcs a2 , two short arcs a3 and a straight line a4 connecting the long arc a2 and the short arc a3; the long arc a2 is coaxial with the rotating shaft a, and the straight line a4 is tangent to the long arc a2 and the short arc a3; the cam a1 Magnets b are inlaid evenly on the top; the housing c is equipped with an end cover d through screws, and the rotating shaft a is installed on the side wall c3 and the end cover d of the housing c through the bearing e; the inner side of the upper wall c1 of the housing c is screwed A hanger f is installed, a base g is installed on the inner side of the lower wall c2 through screws, and a counterweight G is installed on the outer side of the lower wall c2 of...

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Abstract

The invention relates to a broadband suspended energy harvester, which belongs to the technical field of wind turbine generator monitoring. A wind turbine generator blade is arranged on the spindle of the generator; one end of a rotation shaft is arranged on the wind turbine generator blade; cams, at intervals, are arranged on the rotation shaft; magnets are uniformly embedded on the cams; an end cover is arranged on a shell; the rotation shaft is arranged on the side wall and the end cover of the shell through a bearing; the inner side of the upper wall of the shell is provided with a hanger, the inner side of the lower wall is provided with a base, and the outer side of the lower wall of the shell is provided with a clump weight; a fork tooth of the hanger is placed between two axial adjacent cams, and the fork tooth is embedded with a coil; two sides of a boss of the base are provided with transducers; the free end of each transducer abuts against the cam, and when the free end of each transducer is tangent to the long arc on the cam, the transducer is in a flat and straight state, and is not bent and deformed; and when the free end of each transducer is tangent to the short arc on the cam, the bending and deformation amount of the transducer is the largest, and at the time, the maximum pressure stress on a piezoelectric plate is smaller than the allowable value and the deformation amount of the transducer is smaller than the allowable value.

Description

technical field [0001] The invention belongs to the technical field of wind power generator monitoring, and in particular relates to a broadband suspension energy harvester for supplying power to a wind power generator blade monitoring system. Background technique [0002] The blade is the key component of the wind turbine to receive wind energy and convert it into kinetic energy, which determines the reliability and service life of the generator. Wind turbine blades usually work in harsh environments, and their structural scale, weight and working load are very large. In addition to being damaged by irresistible natural disasters such as lightning strikes and earthquakes, natural corrosion, wear and fatigue stress, etc. Leaf damage is also inevitable. Practice has shown that one-third of the accidents during the operation of wind turbines are caused by blade damage, so the health monitoring of wind turbine blades is imperative. With the increasing length of wind turbine b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18H02K7/18
CPCH02K7/183H02N2/183Y02E10/72
Inventor 蒋永华朱雅娜马继杰
Owner ZHEJIANG NORMAL UNIVERSITY
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