Piezoelectric generator for train wheel train monitoring system
A technology for monitoring systems and generators, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve problems such as rupture and damage in places with limited axial space, Achieve high reliability, strong power generation capacity, and effective frequency bandwidth
Active Publication Date: 2020-03-24
ZHEJIANG NORMAL UNIVERSITY
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Problems solved by technology
The common feature of various existing piezoelectric power generation devices is that they generate electricity through axial excitation, and the piezoelectric wafers are subjected to alternating tension and compression stress during operation, so they are not suitable for occasions where the axial space is limited and when the tension stress is too large. will crack and damage
Method used
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[0012] On the frame X, the wheel shaft Y is installed through the bearing, and the shell a is installed through the screws. The end of the wheel shaft Y is installed with the turntable c through the screws. Sector-shaped main magnets n are evenly distributed on the edge of the plate through screws, and the angle c2 between two adjacent main magnets n in the circumferential direction is smaller than the angle c1 between the two sides of the main magnet n itself; the side of the frame a There is an inclined installation surface a4 on the wall a1, and the acute angle a5 between the installation surface a4 and the side wall a1 is greater than 30 degrees; the two ends of the pin shaft b are respectively fixed on the upper wall a2 and the lower wall a3 of the housing a, and the pin shaft The support spring k1, the exciter f and the buffer spring k2 are set sequentially on b from bottom to top, and the exciter f presses the buffer spring k2 and the support spring k1 respectively on th...
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The invention relates to a piezoelectric generator for a train wheel train monitoring system, and belongs to the technical field of new energy, wherein the frame is provided with a shell and a wheel shaft with a turntable, and main magnets are uniformly distributed on the turntable; a mounting surface is arranged on the side wall of the frame, the two ends of the pin shaft are fixed to the upper wall and the lower wall of the shell respectively, the pin shaft is sleeved with a supporting spring, an exciter and a buffer spring, and the exciter presses the buffer spring and the supporting springto the upper wall and the lower wall of the shell respectively; wherein a group of cams and bosses are arranged on the exciter, auxiliary magnets are arranged on the bosses, the main magnet and the auxiliary magnets form a magnetic pair, and a cam surface consists of a bottom surface, an inclined surface and a top surface which are connected in sequence; a piezoelectric vibrator with a substrateflange at the free end is mounted on the mounting surface of the frame, the piezoelectric vibrator is formed by bonding a substrate and a piezoelectric patch which are equal in thickness, and the substrate flange abuts against the cam surface; in a non-working state, the pre-bending deformation generated by the installation of the piezoelectric vibrator is half of the allowable value of the piezoelectric vibrator; and when the support spring and the buffer spring are pressed, the flangings of the substrate are respectively kept in contact with the top surface and the bottom surface of the cam.
Description
technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a piezoelectric generator for a train wheel train monitoring system. Background technique [0002] Rail transportation systems such as railway trains and subways carry the lifeline of the national economy, and rail vehicle wheel sets are the key to ensuring the safe operation of rail vehicles. In the past, the health status of key operating components such as rail vehicle wheelsets was guaranteed by regular maintenance and overhaul; with the continuous improvement of vehicle operating speed and the improvement of people's safety awareness, the research on real-time online monitoring technology of wheel sets during vehicle operation has received great attention. It has attracted extensive attention of scholars at home and abroad, and the required monitoring elements include the temperature, speed, dynamic stiffness, wear and vibration of shafts and bearings, and man...
Claims
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IPC IPC(8): H02N2/18
CPCH02N2/183
Inventor 姚汤伟杨泽盟王淑云郑佳佳王凯温建明曾平黄芳胜
Owner ZHEJIANG NORMAL UNIVERSITY