Shaft end overhanging-type piezoelectric beam generator based on clamp limit
A piezoelectric beam and generator technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc. problems such as narrow speed band, to achieve the effect of novel structure, effective speed band, easy installation and maintenance
Inactive Publication Date: 2013-09-18
ZHEJIANG NORMAL UNIVERSITY
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Problems solved by technology
[0004] The invention provides a piezoelectric beam generator suspended from the shaft end based on clamping and limiting, which is a health monitoring system for propellers / vehicle wheels, cantilever shafts and other rotating bodies without fixed support or whose support points are far away from the shaft end. Power supply needs to solve the problems of low power generation efficiency, low reliability, narrow effective speed band, or the failure of piezoelectric vibrators to generate power in existing rotary piezoelectric generators
Method used
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[0014] The left end cover 2 and the right end cover 12 are respectively installed on the two ends of the housing 1 by screws, and the inside of the bottom of the left end cover 2 and the right end cover 12 are respectively embedded with a limit ring 4 and a bearing 6; the hammer body 901 of the suspension hammer 9 is screwed Fixed inside the housing 1, two stop rings 902 and a through hole 903 are provided on the pendulum 9, and the centers of the stop rings 902 and the through holes 903 are the same; the left end cover 2 and the right end cover 12 The sector-shaped piezoelectric vibrator 3 is respectively crimped with the housing 1. The piezoelectric vibrator 3 is formed by bonding a metal substrate 301 and a piezoelectric wafer 302. The other end of the piezoelectric vibrator 3 is clamped at a limit position. Between the sharp point of ring one 4 and limit ring two 902, the free end of piezoelectric vibrator 3 is also installed with circular magnet one 5 through screws; the r...
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The invention relates to a shaft end overhanging-type piezoelectric beam generator based on clamp limit, belonging to the technical field of new energy and power generation. A left end cover and a right end cover are arranged on a shell; limit rings I and bearings are embedded at the bottoms of the end covers; a hammer body provided with the limit rings and a through hole is fixed in the shell through a bolt; fan-shaped piezoelectric vibrators are connected between the left end cover and the shell as well as between the right end cover and the shell in a press mode; the other end of each piezoelectric vibrator is clamped between two limit ring points; a free end is provided with a piece of magnet I; rotating shafts of rotors are arranged on the left end cover and the right end cover through the bearings; one end of each rotating shaft is fixed with a connecting plate through a nut; and a piece of magnet II is embedded on the rotating plate of each rotor. The shaft end overhanging-type piezoelectric beam generator based on the clamp limit has the advantages that external fixed support is not needed; the generator is an integrated independent component; and a rotating body structure needs not to be changed, so that the generator is convenient to install and maintain; the piezoelectric vibrator is restricted by the limit ring, and is high in reliability and effective in bandwidth.
Description
technical field [0001] The invention belongs to the technical field of new energy and power generation, and specifically relates to a piezoelectric beam generator suspended from the shaft end based on clamping and limiting, which is used for power supply of a health monitoring system without a fixed support rotating body. Background technique [0002] In order to meet the power supply requirements of the health monitoring system of rotating bodies such as helicopter propellers, automobile tires, aeroengines, high-speed trains, oil and gas drill spindles and their bearing components, domestic and foreign scholars have proposed various forms of rotary piezoelectric and electromagnetic micro power generation. machine. Relatively speaking, the rotary electromagnetic generator is very mature and has been widely used, but it is not suitable for powering the wireless sensor monitoring system because of the electromagnetic interference generated during the power generation process. ...
Claims
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Inventor 程光明阚君武陈一峰曾平王淑云
Owner ZHEJIANG NORMAL UNIVERSITY