Circular piezoelectric vibrator power generation device for wind turbine blade monitoring system

Abstract

The invention relates to a round piezoelectric vibrator power generating device for a wind driven generator blade monitoring system and belongs to the technical filed of new energy and power generation. An end cover is fixed on a body through a bolt. The end cover and the bottom wall of the body are respectively provided with a round piezoelectric vibrator. Movable magnets are arranged in the centers of the piezoelectric vibrators. Shaft sleeves are respectively inlaid in the center of the end cover and the center of the inner side of the bottom wall of the body. Rotary shafts of excitation discs are arranged in inner holes of the shaft sleeves. Fixed magnets are inlaid on flange plates of the excitation discs. The radius of each fixed magnet is equal to the radius of each movable magnet arranged on each piezoelectric vibrator, and the fixed magnets and the movable magnets are arranged in like poles mode. Mass blocks are welded at the rims of the flange plates of the excitation discs. The round piezoelectric vibrator power generating device for the wind driven generator blade monitoring system has the advantages that effective excitation and power generation of the piezoelectric vibrators are achieved, outside is not needed to fix and support the round piezoelectric vibrator power generating device, the power generating device is an independent part, blade structure is not needed to be changed, and the round piezoelectric vibrator power generating device is convenient to install and maintain.

Description

technical field [0001] The invention belongs to the technical field of new energy and power generation, and in particular relates to a circular piezoelectric vibrator power generation device for 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 overall reliability and service life of the generator. Wind turbine blades usually work in a harsh environment, 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. Production practice shows 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...

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Problems solved by technology

[0005] The present invention provides a circular piezoelectric vibrator power generation device for a wind turbine blade monitoring system, to solve the current problems that cannot be used for "no fixed support" rotating body power generation, and the piezoelectric vibrator has large stress changes and low reliability during operation. The problem of narrow effective speed band

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