A piezoelectric generator for train wheel train monitoring system

Abstract

The invention relates to a piezoelectric generator for a train wheel train monitoring system, which belongs to the technical field of new energy sources. The frame is equipped with a shell and a wheel shaft with a turntable, and the main magnets are evenly distributed on the turntable; there is a mounting surface on the side wall of the frame, and the two ends of the pin shaft are respectively fixed on the upper and lower walls of the shell, and the pin shaft is covered with a support spring. , exciter and buffer spring, the exciter press-connects the buffer spring and the support spring to the upper wall and the lower wall of the shell respectively; the exciter is provided with a set of cams and bosses, and the bosses are equipped with secondary magnets, the main magnet and the The auxiliary magnet constitutes the magnetic pair, and the cam surface is composed of the bottom surface, the inclined surface and the top surface connected in sequence; the piezoelectric vibrator with the substrate flanging at the free end is installed on the mounting surface of the frame, and the piezoelectric vibrator is composed of a substrate of equal thickness and a piezoelectric vibrator. The flange of the substrate is pressed against the cam surface; when the piezoelectric vibrator is not in operation, the pre-bending deformation generated by the installation of the piezoelectric vibrator is half of its allowable value; when the support spring and the buffer spring are pressed to death, the flange of the substrate Keep in contact with the top and bottom faces of the cam, respectively.

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...

AI Technical Summary

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

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