CN102801357B - Piezoelectric power-generation device for supplying power for rail vehicle bearing monitoring system - Google Patents
Piezoelectric power-generation device for supplying power for rail vehicle bearing monitoring system Download PDFInfo
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- CN102801357B CN102801357B CN201210318784.3A CN201210318784A CN102801357B CN 102801357 B CN102801357 B CN 102801357B CN 201210318784 A CN201210318784 A CN 201210318784A CN 102801357 B CN102801357 B CN 102801357B
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- piezoelectric transducer
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- bearing cap
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Abstract
The invention relates to a piezoelectric power-generation device for supplying power for a rail vehicle bearing monitoring system, and belongs to the technical field of rail transportation monitoring and piezoelectric power-generation. A wheel shaft is arranged on a frame by a bearing; moving magnets with opposite pole configuration directions are embedded on the end faces of a T-shaped chock block; a bearing cap is arranged on the frame by a bolt, a piezoelectric transducer is arranged in the internal part of the bearing cap in a pressure-connecting manner by a circular separation blade and an annular separation blade, and the piezoelectric transducer is formed by bonding a metal substrate and a piezoelectric crystal plate; a static magnet is arranged on the metal substrate of the piezoelectric transducer by a bolt; and a sensing monitoring system on the frame is connected with the piezoelectric transducer by a wire. The piezoelectric generating device has the advantages that the generating device is integrated inside the bearing cap and is excited in a non-contact way by the rotating wheel shaft and magnetic coupling, has no contact impact and noise, and is capable of generating electricity at a constant or high speed.
Description
Technical field
The invention belongs to track traffic monitoring and piezo-electric generating technical field, be specifically related to a kind of piezoelectric generating device of powering for rail vehicle bearing monitor system.
Background technology
The rail vehicle transportation such as railroad train and subway system bearing lifelines of the national economy, and the wheel shaft of rail vehicle and bearing are the keys guaranteeing rail vehicle safe operation.In the past, the health status of the crucial running gear such as rail vehicle wheel shaft and bearing was ensured with periodic maintenance, maintenance; Along with improving constantly and the lifting of people's awareness of safety of running velocity, during vehicle operating, the real time on-line monitoring technical research of wheel shaft and bearing etc. receives the extensive concern of Chinese scholars, and required monitoring key element comprises temperature, rotating speed, dynamic rate, all many-sides such as wearing and tearing and vibration of axle and bearing.
For wheel shaft and bearing monitor system, desirable method is installed on the rotary shaft by all kinds of sensing and monitoring system or installs near bearing, thus realize the direct-on-line monitoring of its running status; But this monitoring scheme is because being difficult to apply for the providing reliable, sufficient supply of electric power of sensing and monitoring system, reason is: 1. train is kept in motion and there is high frequency pitch between train and compartment, and when adopting cable power supply, the low and freight compartment of reliability itself is also without distribution system; 2. as adopted powered battery, needing because battery is limited often to change, effective monitoring cannot be realized when not changing in time when battery electric quantity deficiency, even cause serious potential safety hazard.
Be limited to the energy supply problem of sensing and monitoring system, what generally adopt in current reality is non real-time, indirectly measuring method, by sensing and monitoring system as on roadbed, do not move with car body or do not rotate with wheel shaft, such as: the temperature monitoring system that Chinese patent CN101072985A, CN102278950A etc. provide, the axletree monitoring means that Chinese patent CN102120461A, CN102101484A, CN102101485A etc. provide, etc.Visible, due to rail vehicle wheel shaft and bearing working environment particularity and a supply of electric power difficult problem caused thus, real time on-line monitoring system truly, the especially directly real-time monitoring system of wheel axle and bearing state are also difficult to apply.
Summary of the invention
The invention provides a kind of piezoelectric generating device of powering for rail vehicle bearing monitor system, power for rail vehicle bearing monitor system, to realize real-time, the direct online health monitoring of bearing.
The technical scheme that the present invention takes is: wheel shaft is arranged on vehicle frame by bearing; The end of wheel shaft is provided with T-shaped block by screw, and one end of described T-shaped block is crimped on the inner ring of bearing, other end is inlaid with the moving magnet that pole configuration direction is contrary; Bearing cap is arranged on vehicle frame by screw, and the bottom of described bearing cap is provided with cannelure; The end face of described bearing cap bottom annular recess is provided with PZT (piezoelectric transducer), rounded tabs and annular catch by screw; The center and peripheral position of PZT (piezoelectric transducer) is crimped on the end face of bearing cap bottom annular recess by described rounded tabs and annular catch; Described PZT (piezoelectric transducer) is by metal substrate and piezoelectric chip is bonding forms; Fixed magnet to be arranged on the metal substrate of PZT (piezoelectric transducer) by screw and to be in the centre of piezoelectric chip; Sensing and monitoring system to be arranged on vehicle frame by screw and to be placed in the inside of bearing cap, and described sensing and monitoring system is connected with PZT (piezoelectric transducer) by wire group.
In the present invention, the effect of moving magnet and fixed magnet produces repulsive force alternately and attraction by relatively rotating, and the function of PZT (piezoelectric transducer) converts mechanical energy to electric energy.
During track vehicle operating, first, second moving magnet be embedded on T-shaped block rotates with wheel shaft, and the PZT (piezoelectric transducer) being arranged on bearing cap inside and the fixed magnet geo-stationary be arranged on described transducer.When the first moving magnet rotates near fixed magnet, namely moving magnet and fixed magnet like pole are close, generation repulsive force; On the contrary, when the second moving magnet rotates near fixed magnet, namely moving magnet and fixed magnet opposite pole are close, generation attraction.Between moving magnet and fixed magnet, the alternately change of repulsive force and attraction makes PZT (piezoelectric transducer) produce cyclic bending to be out of shape, thus converts mechanical energy to electric energy, and the electric energy produced is directly used in driving monitoring system after certain conversion process.
Feature of the present invention is: the bending deformation quantity of PZT (piezoelectric transducer) and single activation generated energy be by magnetic pole between magnetic field intensity determine, the state changes such as wheel shaft speedup, deceleration and speed height directly affect its nothing, therefore adaptable to the rotating speed of wheel shaft, under various rotary state, there is stronger generating capacity; Meanwhile, by the deflection of magnetic field intensity design limiting PZT (piezoelectric transducer), and then improve the reliability of TRT.
Advantage of the present invention is: 1. TRT is integrated in bearing cap, is encouraged by the wheel shaft rotated and magnetic couple noncontact, and contactless impact, noise and contact encourage the PZT (piezoelectric transducer) damage that may cause; 2. PZT (piezoelectric transducer) is out of shape along axle axial, and deflection and generated energy do not affect by wheel shaft rotary state, rotating speed adaptive capacity and generating capacity by force, at the uniform velocity and high speed time all can generate electricity, and reliability is high.
Accompanying drawing explanation
Fig. 1 is the structure diagrammatic cross-sectional view of piezoelectric generating device in a preferred embodiment of the present invention;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is the I portion enlarged drawing of Fig. 1;
Fig. 4 is the structural representation of PZT (piezoelectric transducer) of the present invention;
Fig. 5 is the B-B view of Fig. 4.
Detailed description of the invention
Wheel shaft 3 is arranged on vehicle frame 1 by bearing 2; The end of wheel shaft 3 is provided with T-shaped block 4 by screw, one end of described T-shaped block 4 is crimped on the inner ring of bearing 2, other end is inlaid with first group of moving magnet 5 and second group of moving magnet 5 ', and the pole configuration direction of described two adjacent first group of moving magnets 5 and second group of moving magnet 5 ' is contrary; Bearing cap 6 is arranged on vehicle frame 1 by screw, and the bottom of described bearing cap 6 is provided with cannelure 601; The end face of described bearing cap 6 bottom annular recess 601 is provided with PZT (piezoelectric transducer) 7, rounded tabs 8 and annular catch 9 by screw; The center and peripheral position of PZT (piezoelectric transducer) 7 is crimped on the end face of bearing cap 6 bottom annular recess 601 by described rounded tabs 8 and annular catch 9; Described PZT (piezoelectric transducer) 7 is by metal substrate 701 and piezoelectric chip 702 is bonding forms; Fixed magnet 10 to be arranged on the metal substrate 701 of PZT (piezoelectric transducer) 7 by screw and to be in the centre of piezoelectric chip 702; Sensing and monitoring system 12 to be arranged on vehicle frame 1 by screw and to be placed in the inside of described bearing cap 6, and described sensing and monitoring system 12 is connected with PZT (piezoelectric transducer) 7 by wire group 11.
In the present invention, the effect of moving magnet 4 and fixed magnet 10 produces repulsive force alternately and attraction by relatively rotating, and the function of PZT (piezoelectric transducer) 7 converts mechanical energy to electric energy.
During track vehicle operating, T-shaped block 4 and the first group of moving magnet 5 be embedded on T-shaped block 4 and second group of moving magnet 5 ' rotate with wheel shaft 3, and the PZT (piezoelectric transducer) 7 being arranged on bearing cap 6 inside and fixed magnet 10 geo-stationary be arranged on described transducer 7.Time near the rotation in first group of moving magnet 5 to fixed magnet 10, the N pole of moving magnet 5 and the N of fixed magnet extremely close, produce repulsive force, thus make PZT (piezoelectric transducer) 7 produce flexural deformation left; Repulsive force after first group of moving magnet 5 leaves fixed magnet 10, between magnetic pole fades away.Meanwhile, second group of moving magnet 5 ' is near fixed magnet 10, and the S pole of moving magnet 5 ' is extremely close with the N of fixed magnet 10, generation attraction, thus makes PZT (piezoelectric transducer) 7 produce flexural deformation to the right.First group of moving magnet 5 and second group of moving magnet 5 ' alternately near and away from fixed magnet 10, even if PZT (piezoelectric transducer) 7 produces cyclic bending distortion alternately, thus convert mechanical energy to electric energy; The electric energy generated flows to the sensing and detecting system 12 be positioned on vehicle frame 1 by wire group 11.
Claims (1)
1. for the piezoelectric generating device that rail vehicle bearing monitor system is powered, it is characterized in that: wheel shaft is arranged on vehicle frame by bearing; The end of wheel shaft is provided with T-shaped block by screw, and one end of described T-shaped block is crimped on the inner ring of bearing, other end is inlaid with the moving magnet that pole configuration direction is contrary; Bearing cap is arranged on vehicle frame by screw, and the bottom of described bearing cap is provided with cannelure; The end face of described bearing cap bottom annular recess is provided with PZT (piezoelectric transducer), rounded tabs and annular catch by screw; The center and peripheral position of PZT (piezoelectric transducer) is crimped on the end face of bearing cap bottom annular recess by described rounded tabs and annular catch; Described PZT (piezoelectric transducer) is by metal substrate and piezoelectric chip is bonding forms; Fixed magnet to be arranged on the metal substrate of PZT (piezoelectric transducer) by screw and to be in the centre of piezoelectric chip; Sensing and monitoring system to be arranged on vehicle frame by screw and to be placed in the inside of described bearing cap, and described sensing and monitoring system is connected with PZT (piezoelectric transducer) by wire group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210318784.3A CN102801357B (en) | 2012-09-01 | 2012-09-01 | Piezoelectric power-generation device for supplying power for rail vehicle bearing monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210318784.3A CN102801357B (en) | 2012-09-01 | 2012-09-01 | Piezoelectric power-generation device for supplying power for rail vehicle bearing monitoring system |
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| Publication Number | Publication Date |
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| CN102801357A CN102801357A (en) | 2012-11-28 |
| CN102801357B true CN102801357B (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210318784.3A Expired - Fee Related CN102801357B (en) | 2012-09-01 | 2012-09-01 | Piezoelectric power-generation device for supplying power for rail vehicle bearing monitoring system |
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| CN103973161A (en) * | 2014-04-25 | 2014-08-06 | 天津大学 | Rotation piezoelectric energy collecting device |
| CN103994144B (en) * | 2014-05-28 | 2016-02-17 | 浙江师范大学 | A kind of High-Speed Cylindrical Roller Bearing with self power generation monitoring device |
| CN103973162B (en) * | 2014-05-28 | 2016-05-04 | 浙江师范大学 | A kind of band is from the cylinder roller bearing of monitoring assembly |
| CN103982541B (en) * | 2014-05-28 | 2017-01-11 | 浙江师范大学 | Large-scale high-speed conical roller bearing with automatic power supply monitoring for electric power facility |
| CN103982542B (en) * | 2014-05-28 | 2017-01-11 | 浙江师范大学 | Self-monitoring conical ball bearing for generator |
| CN103982543B (en) * | 2014-05-28 | 2017-07-25 | 浙江师范大学 | Wind-driven generator perceives taper roll bearing certainly |
| CN103982539B (en) * | 2014-05-28 | 2017-01-11 | 浙江师范大学 | High-speed ball bearing with integrated monitoring assembly |
| CN104158438A (en) * | 2014-08-26 | 2014-11-19 | 天津大学 | Permanent magnet piezoelectric energy harvesting device |
| CN105119522A (en) * | 2015-09-02 | 2015-12-02 | 北京印刷学院 | Railway operation remote monitoring impact vibration piezoelectric conversion mass-energy conversion device |
| CN106160572B (en) * | 2016-06-15 | 2017-11-21 | 浙江师范大学 | A kind of radial telescopic type piezoelectric generator of gyromagnet excitation |
| CN106123914B (en) * | 2016-06-15 | 2018-06-01 | 浙江师范大学 | A kind of self-powered vehicle positioning tracking and warning device |
| CN107565849B (en) * | 2017-08-17 | 2019-03-05 | 浙江师范大学 | A kind of high-speed rail rotor string monitoring device |
| CN108429353A (en) * | 2018-03-14 | 2018-08-21 | 西安交通大学 | A kind of spontaneous electrical component suitable for rolling bearing test system |
| CN113464574B (en) * | 2021-07-05 | 2023-05-26 | 浙江师范大学 | Bearing monitoring device from electricity generation |
| CN113437899B (en) * | 2021-07-05 | 2023-01-31 | 浙江师范大学 | Follow-up rotating body monitoring device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002369554A (en) * | 2001-06-06 | 2002-12-20 | Nec Tokin Corp | Indicator |
| CN101274636A (en) * | 2007-03-26 | 2008-10-01 | 林贵生 | Vehicle-mounted intelligent supervising and early warning device for running status of track traffic vehicle |
| WO2011059129A1 (en) * | 2009-11-10 | 2011-05-19 | (주)우광테크 | Energy harvesting device employing a piezoelectric ceramic and magnets |
| KR100982643B1 (en) * | 2009-11-10 | 2010-09-17 | (주)우광테크 | An apparatus of energy harvesting for using piezoelectric-ceramic and magnet |
| CN102255557B (en) * | 2011-07-20 | 2013-08-07 | 大连理工大学 | Rotary piezoelectric generation device |
| CN202721625U (en) * | 2012-09-01 | 2013-02-06 | 浙江师范大学 | Piezoelectric power generation apparatus used for supplying electric power for track vehicle bearing monitoring system |
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Inventor after: Cheng Guangming Inventor after: Han Junwu Inventor after: Wang Shuyun Inventor after: Li Ning Inventor after: Yin Xiaohong Inventor after: Zhang Zhonghua Inventor before: Han Junwu Inventor before: Wang Shuyun Inventor before: Zhao Zichao Inventor before: Cheng Guangming Inventor before: Zhang Zhonghua Inventor before: Li Shengjie |
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Free format text: CORRECT: INVENTOR; FROM: KAN JUNWU WANG SHUYUN ZHAO ZICHAO CHENG GUANGMING ZHANG ZHONGHUA LI SHENGJIE TO: CHENG GUANGMING KAN JUNWU WANG SHUYUN LI NING YIN XIAOHONG ZHANG ZHONGHUA |
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