CN214799328U - Track vibration energy recovery device - Google Patents
Track vibration energy recovery device Download PDFInfo
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- CN214799328U CN214799328U CN202120707102.2U CN202120707102U CN214799328U CN 214799328 U CN214799328 U CN 214799328U CN 202120707102 U CN202120707102 U CN 202120707102U CN 214799328 U CN214799328 U CN 214799328U
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Abstract
The utility model discloses a track vibration energy recovery device, include: the device comprises a piezoelectric power generation device, a vibration coupling mechanism, a mechanical transmission power generation device and an energy acquisition and storage device. The piezoelectric generating device is used for converting the first mechanical vibration energy into piezoelectric electric energy through a piezoelectric material and outputting the piezoelectric electric energy; the vibration coupling mechanism is used for transmitting and outputting the first mechanical vibration energy remaining after the conversion of the piezoelectric power generation device; the mechanical transmission power generation device is used for converting the second mechanical vibration energy output by the vibration coupling mechanism into mechanical electric energy to be output; the energy acquisition and storage device is electrically connected with the piezoelectric power generation device and the mechanical transmission power generation device respectively and is used for acquiring and storing the piezoelectric power output and the mechanical power output. The utility model provides a piezoelectricity power generation facility and mechanical transmission power generation facility parallel operation have realized utilizing and the diversification of mechanical vibration energy collection mode to the step of mechanical vibration energy, have avoided the waste of track vibration energy.
Description
Technical Field
The utility model relates to a track traffic equipment technical field, in particular to track vibration energy recovery device.
Background
The rail train has the characteristics of heavy load and high running speed, and the rail is always in a reciprocating cycle state of loading and unloading because the train continuously rolls the rail when running. In reality, the track is not completely rigid, and factors such as track irregularity excite and induce vibration of different degrees in each structural layer of the track, and energy generated by the vibration is mostly absorbed by the steel rails, sleepers and roadbed, so that the energy is wasted.
The conventional rail vibration energy recovery device, such as a rail vibration energy collection device based on a space X-type mechanism disclosed in patent CN2020101492634, is provided with an upper bearing plate, a lower bearing plate and two ball pairs connected between the upper bearing plate and the lower bearing plate, wherein the two ball pairs are driven by pressure applied to the upper bearing plate to drive the lower bearing plate to rotate, the lower bearing plate further drives a rotating shaft cylinder to rotate, a transmission gear is connected to the outer side of the rotating shaft cylinder, and the transmission gear is connected with an input shaft of a power generation device, so that mechanical energy is converted into electric energy. However, the device has too many parts, which results in low reliability and low energy collection efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an efficient track vibration energy recovery device is collected to energy.
According to the utility model provides a pair of track vibration energy recovery device, include: the device comprises a piezoelectric power generation device, a vibration coupling mechanism, a mechanical transmission power generation device and an energy acquisition and storage device. The piezoelectric generating device is used for converting the first mechanical vibration energy into piezoelectric electric energy through a piezoelectric material and outputting the piezoelectric electric energy; the vibration coupling mechanism is used for transmitting and outputting the first mechanical vibration energy remaining after the conversion of the piezoelectric power generation device; the mechanical transmission power generation device is used for converting the second mechanical vibration energy output by the vibration coupling mechanism into mechanical electric energy to be output; the energy acquisition and storage device is electrically connected with the piezoelectric power generation device and the mechanical transmission power generation device respectively and is used for acquiring and storing the piezoelectric power output and the mechanical power output.
According to the utility model discloses above-mentioned embodiment's track vibration energy recovery device has following beneficial effect at least: the piezoelectric power generation device and the mechanical transmission power generation device work in parallel, so that the cascade utilization of mechanical vibration energy is realized, the energy collection efficiency of the device is greatly improved, and the waste of the rail vibration energy is avoided while the recycling of the rail vibration energy is realized; in addition, the electric energy generated by the two power generation devices is collected and stored by the energy collecting and storing device, so that the power generation device can be used for supplying energy to electronic equipment beside a track or serving as an emergency standby power supply of platform public facilities, and has strong practicability.
According to some embodiments of the present invention, the piezoelectric power generating device comprises a first housing, a plurality of sets of piezoelectric vibrators arranged in the first housing, wherein the output end of the piezoelectric vibrator is electrically connected to the input end of the energy collecting and storing device.
According to some embodiments of the invention, the piezoelectric vibrator is a Cymbal type piezoelectric vibrator.
According to the utility model discloses a some embodiments, first casing is the hemisphere, first casing is inside to be equipped with two insulating trays at least along its direction of height, the piezoelectric vibrator correspondence is installed each on insulating tray's the last lower terminal surface.
According to some embodiments of the utility model, the upper and lower terminal surface of insulating tray equally divide into a plurality of fan-shaped installation areas along its circumference, piezoelectric vibrator is the array and installs each in the fan-shaped installation area.
According to some embodiments of the present invention, the same piece each on the up end of insulating tray the polarization direction of piezoelectric vibrator is the same, same piece each on the lower terminal surface of insulating tray the polarization direction of piezoelectric vibrator is the same with on the up end the polarization direction of piezoelectric vibrator is the same, adjacent from top to bottom between the insulating tray the polarization direction of piezoelectric vibrator is opposite, adjacent from top to bottom between the insulating tray adjacent cymbal type metal cap of piezoelectric vibrator passes through conducting medium and connects, each adjacent on the same terminal surface of insulating tray cymbal type metal cap of piezoelectric vibrator passes through the wire and connects, each piezoelectric vibrator parallel connection is in the same place.
According to some embodiments of the present invention, the upper and lower end surfaces of the first case are both of a planar design and are connected to the cymbal type metal cap of the piezoelectric vibrator through an insulating medium.
According to some embodiments of the present invention, a shock pad is provided on the upper end surface of the first housing.
According to some embodiments of the utility model, vibration coupling mechanism includes top board and holding down plate, locates the top board with reset spring between the holding down plate, the top board is used for supporting piezoelectric power generation device, the holding down plate is used for drive under reset spring's the spring action mechanical transmission power generation device's input side.
According to some embodiments of the utility model, mechanical transmission power generation facility includes the second casing of chimney shape and locates piston, connecting rod, bent arm, eccentric shaft in the second casing and with the step-up gear that eccentric shaft transmission is connected, with the generator that the step-up gear transmission is connected, the output of generator with energy acquisition and storage device's input electric connection, the one end of connecting rod with the connection can be dismantled to the piston, the other end of connecting rod with bent arm rotates to be connected, top board, holding down plate, reset spring all locate in the chimney shape casing, top board and holding down plate are arranged perpendicularly from top to bottom, the holding down plate is used for the drive the piston is followed reciprocating motion is made to chimney shape casing height direction.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of the embodiment of FIG. 1;
fig. 3 is a cross-sectional view of a piezoelectric power generation device according to an embodiment of the present invention;
fig. 4 is a top view of an insulation tray according to an embodiment of the present invention.
Reference numerals:
a piezoelectric power generation device 100, a first housing 110, an insulating tray 111, a conductive medium 112, a cushion 113, and a piezoelectric vibrator 120;
the vibration coupling mechanism 200, the upper pressure plate 210, the wire guide 211, the lower pressure plate 220 and the return spring 230;
mechanical transmission power generation device 300, second shell 310, piston 320, connecting rod 330, crank arm 340, eccentric shaft 350, speed-increasing gear box 360 and generator 370.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless explicitly defined otherwise, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the terms in the present invention by combining the specific contents of the technical solutions.
Referring to fig. 1 to 4, for the utility model discloses a track vibration energy recovery device, include: the piezoelectric power generating device 100, the vibration coupling mechanism 200, the mechanical transmission power generating device 300, and an energy collecting and storing device (not shown in the drawings).
The piezoelectric power generating device 100 is provided with a piezoelectric material therein, and the piezoelectric material converts the first mechanical vibration energy generated when the train passes through the rail into piezoelectric power to be output.
The vibration coupling mechanism 200 transmits the first mechanical vibration energy remaining after the conversion of the piezoelectric power generator 100 to the input side of the mechanical transmission power generator 300.
The mechanical transmission power generation device 300 converts the second mechanical vibration energy conducted and output by the vibration coupling mechanism 200 into mechanical electric energy to be output.
The energy acquisition and storage device comprises a rectifying device and an energy storage device which are sequentially connected in series electrically. The rectifying device is electrically connected to the output terminals of the piezoelectric power generator 100 and the mechanical transmission power generator 300, respectively, and is configured to rectify and filter the piezoelectric power output and the mechanical power output. The energy storage device is used for storing the electric energy output by the rectifying device, so that the aim of recycling the track vibration energy is fulfilled. The energy stored by the energy storage device is used for a wide range of purposes, for example to power trackside electronics or to serve as an emergency backup power source for platform utilities.
In some embodiments of the present invention, as shown in fig. 3, the piezoelectric power generating device 100 includes a first casing 110, a plurality of sets of piezoelectric vibrators 120 disposed in the first casing 110, and an output end of the piezoelectric vibrators 120 is electrically connected to an input end of the energy collecting and storing device.
The piezoelectric ceramic in the piezoelectric vibrator 120 is deformed by mechanical vibration, and generates electromotive force at both ends in the polarization direction thereof, thereby converting mechanical vibration energy into electric energy.
The first shell 110 provides a support for the whole piezoelectric vibrator 120 stack, and also provides constant prestress for the whole piezoelectric vibrator 120 stack, so that the piezoelectric vibrator 120 stack is always in a compression state when vibrating. In addition, the first housing 110 may be directly attached to the contact surface of the vibration source, or the area of the vibration source may be enlarged by other mechanical structures.
In some embodiments of the present invention, the piezoelectric vibrator 120 is a Cymbal type piezoelectric vibrator, and the piezoelectric vibrator with such a structure can transform the small radial expansion of the piezoelectric ceramic wafer into the bending deformation of the metal thin-shell cavity. The same number of Cymbal type piezoelectric vibrators can generate larger displacement output than piezoelectric vibrators of other structures under the same voltage.
In some embodiments of the present invention, as shown in fig. 3, the first casing 110 is a hemispherical cavity, at least two insulating trays 111 are disposed inside the first casing 110 along the height direction thereof, and Cymbal piezoelectric vibrators are correspondingly mounted on the upper and lower end surfaces of each insulating tray 111.
In the present embodiment, each Cymbal type piezoelectric vibrator is bonded to the insulating tray 111 with epoxy resin. The hemispherical first shell 110 is used as a carrier for bearing the stack of the piezoelectric vibrators 120, so that on one hand, the receiving area of the piezoelectric vibrators 120 for external vibration energy is enlarged, more vibration energy is captured, and the coupling degree of the piezoelectric power generation device 100 and an external vibration source is improved; on the other hand, the hemispherical shell provides a certain prestress for the whole piezoelectric vibrator 120 stack while maintaining a high compressive strength, so that the tensile strength of the whole piezoelectric power generation device 100 is improved, and the piezoelectric vibrator 120 stack is always in a compressed state when vibrating.
In some embodiments of the present invention, as shown in fig. 4, the upper and lower end surfaces of the insulating tray 111 are equally divided into a plurality of fan-shaped mounting regions along the circumferential direction thereof, and the piezoelectric vibrators 120 are mounted in an array manner in the respective fan-shaped mounting regions.
In some embodiments of the present invention, as shown in fig. 3, the polarization direction of each piezoelectric vibrator 120 on the upper end surface of the same insulating tray 111 is the same, the polarization direction of each piezoelectric vibrator 120 on the lower end surface of the same insulating tray 111 is the same as the polarization direction of each piezoelectric vibrator 120 on the upper end surface, adjacent to each other, the polarization direction of the piezoelectric vibrators 120 adjacent up and down between the insulating trays 111 is opposite, the cymbal-shaped metal caps of the piezoelectric vibrators 120 adjacent up and down between the adjacent insulating trays 111 maintain the same polarity and are connected together through the conductive medium 112, the cymbal-shaped metal caps of the piezoelectric vibrators 120 adjacent up and down on the same end surface of each insulating tray 111 are connected together through a wire, and finally each piezoelectric vibrator 120 constitutes a parallel connection structure.
By attaching the piezoelectric vibrators 120 having the same polarization direction to the upper and lower end surfaces of the insulating tray 111 and forming a parallel structure, when the piezoelectric vibrators 120 are bent and deformed, the upper and lower piezoelectric vibrators 120 respectively extend and contract, the electric fields formed by the piezoelectric ceramics in the upper and lower piezoelectric vibrators 120 have the same polarization direction, the electric charges on the cymbal-shaped metal caps of the upper and lower piezoelectric vibrators 120 are the same, and form a potential with the different charges accumulated on the electrodes at the end of the piezoelectric vibrators 120 close to the insulating tray 111, the total output voltage of the piezoelectric power generation apparatus 100 is the same as the voltage output by a single piezoelectric vibrator 120, and the total output power of the piezoelectric power generation apparatus 100 is the sum of the power output by all the piezoelectric vibrators 120. Through such structural layout, the energy collection efficiency is maximized while the space is reasonably utilized.
In some embodiments of the present invention, the upper and lower end surfaces of the first casing 110 are both planar and are connected to the cymbal-shaped top hat of the piezoelectric vibrator 120 through an insulating medium. The upper and lower bottom surfaces of the first shell 110 of the hemispherical shell are designed to be flat surfaces, and can be tightly attached to the contact surface of the Cymbal type piezoelectric vibrator, so that the receiving area of the Cymbal type piezoelectric vibrator to external vibration energy is increased.
In some embodiments of the present invention, as shown in fig. 3, a shock absorbing pad 113 is disposed on the upper end surface of the first housing 110. When a train passes by, the rail transmits mechanical vibration energy to the Cymbal type piezoelectric vibrator through the shock pad 113, the Cymbal type metal cap on the upper surface of the Cymbal type piezoelectric vibrator generates corresponding bending vibration deformation, and the external vibration is buffered and amplified and converted into the radial stress of the piezoelectric vibrator 120 due to the coupling effect between the Cymbal type metal cap and the piezoelectric ceramic in the Cymbal type piezoelectric vibrator. Under the action of the radial stress, the piezoelectric ceramic generates radial motion inside the piezoelectric ceramic, and based on the principle of piezoelectric effect, the alternating external vibration enables the piezoelectric ceramic to generate an alternating electric field, so that mechanical vibration energy is converted into electric energy. The shock pad 113 has excellent elastic energy storage and damping dissipation effects, and by arranging the shock pad 113, the vibration frequency generated when a train just starts to run over the piezoelectric power generation device 100 can be attenuated, so that the safety and reliability of the rail vibration energy recovery device are improved, and the vibration frequency is controlled within the working response range of a Cymbal type piezoelectric vibrator to improve the energy recovery efficiency.
In some embodiments of the present invention, as shown in fig. 2, the vibration coupling mechanism 200 includes an upper pressing plate 210 and a lower pressing plate 220, and a return spring 230 disposed between the upper pressing plate 210 and the lower pressing plate 220, the upper pressing plate 210 is used for supporting the piezoelectric power generating device 100, and the lower pressing plate 220 is used for driving the input side of the mechanical transmission power generating device 200 under the elastic force of the return spring 230. The remaining first mechanical vibration energy after the conversion of the piezoelectric power generation device 100 is transmitted to the upper pressure plate 210, the upper pressure plate 210 is connected to the lower pressure plate 220 through the return spring 230, when the lower pressure plate 220 is pressed, the pressure is transmitted to the input side of the mechanical transmission power generation device 300, and the mechanical transmission power generation device 300 converts the pressure into electric energy by applying work.
The upper platen 210 is further provided with a wire hole 211, and the electric energy output by the piezoelectric power generating device 100 is led out from the wire hole 211 to the energy collecting and storing device through a wire line.
In some embodiments of the present invention, as shown in fig. 2, the mechanical transmission power generation device 300 includes a chimney-shaped second housing 310, and a piston 320, a connecting rod 330, a crank arm 340, an eccentric shaft 350, an acceleration gear box 360 in transmission connection with the eccentric shaft 350, and a generator 370 in transmission connection with the acceleration gear box 360, which are disposed in the second housing 310, wherein an output end of the generator 370 is electrically connected to an input end of the energy collecting and storing device.
One end of the connecting rod 330 is connected to the piston 320 through a spline, and the other end of the connecting rod 330 is connected to the crank arm 340 through a roller bearing.
The upper press plate 210, the lower press plate 220 and the return spring 230 are all arranged in the second casing 310, and the upper press plate 210 and the lower press plate 220 are vertically arranged up and down in the second casing 310. When the upper pressure plate 210 is vibrated, the vibration is transmitted to the return spring 230, the return spring 230 generates an elastic force and acts on the lower pressure plate 220, and the lower pressure plate 220 is pressed to drive the piston 320 to reciprocate along the height direction of the second housing 310.
The connecting rod 330 is driven by the piston 320 to make horizontal rotation movement, and drives the eccentric shaft 350 connected with the crank arm 340 to rotate through the roller bearing, and at this time, the eccentric shaft 350 outputs mechanical energy outwards. Because the rotation speed of the eccentric shaft 350 is relatively low, the eccentric shaft 350 is connected to the speed-up gearbox 360 for acceleration, and the output shaft of the speed-up gearbox 360 is connected to the generator 370 through a coupler, so that the conversion from mechanical energy to electric energy is realized.
In addition, the reciprocating rotation motion of the crank arm 340 eliminates the inverter current generated by the generator when the piston 320 returns, so that the generator 370 is always in the forward rotation no matter the piston 320 is in the descending or ascending stroke, thereby enhancing the safety and reliability of the mechanical transmission power generation device 300. The rotational speed of the generator 370 is increased by the acceleration of the step-up gear box 360, and the energy collection efficiency of the mechanical transmission power generation device 300 is improved.
In this embodiment, the generator 370 may preferably be a PDMC generator to improve energy harvesting efficiency. The piezoelectric power generation device 100 and the mechanical transmission power generation device 300 are connected through the upper pressure plate 210, the return spring 230 and the lower pressure plate 220, so that diversification of mechanical vibration energy collection modes is realized. And the two mechanical vibration energy collection modes work in parallel, so that the cascade utilization of the rail vibration energy can be realized, and the energy collection efficiency is improved.
In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An orbital vibration energy recovery device comprising:
a piezoelectric power generation device (100) for converting the first mechanical vibration energy into piezoelectric power output by a piezoelectric material;
the vibration coupling mechanism (200) is used for transmitting and outputting the first mechanical vibration energy which is remained after the piezoelectric power generation device (100) is converted;
the mechanical transmission power generation device (300) is used for converting the second mechanical vibration energy output by the vibration coupling mechanism (200) into mechanical electric energy to be output;
and the energy acquisition and storage device is electrically connected with the piezoelectric power generation device (100) and the mechanical transmission power generation device (300) respectively and is used for acquiring and storing the piezoelectric power output and the mechanical power output.
2. The orbital vibration energy recovery device according to claim 1, wherein the piezoelectric power generation device (100) comprises a first housing (110), a plurality of sets of piezoelectric vibrators (120) disposed in the first housing (110), and an output end of the piezoelectric vibrators (120) is electrically connected to an input end of the energy harvesting and storing device.
3. The orbital vibration energy recovery device of claim 2 wherein the piezoelectric vibrator (120) is a Cymbal piezoelectric vibrator.
4. The rail vibration energy recovery device according to claim 2 or 3, wherein the first housing (110) is hemispherical, at least two insulating trays (111) are provided inside the first housing (110) along the height direction thereof, and the piezoelectric vibrators (120) are correspondingly mounted on the upper and lower end surfaces of each insulating tray (111).
5. The rail vibration energy recovery device according to claim 4, wherein the upper and lower end surfaces of the insulating tray (111) are equally divided into a plurality of fan-shaped mounting regions along the circumferential direction thereof, and the piezoelectric vibrators (120) are mounted in an array in each of the fan-shaped mounting regions.
6. The rail vibration energy recovery device according to claim 5, wherein the piezoelectric vibrators (120) on the upper end surface of the same insulating tray (111) have the same polarization direction, the piezoelectric vibrators (120) on the lower end surface of the same insulating tray (111) have the same polarization direction as the piezoelectric vibrators (120) on the upper end surface, the piezoelectric vibrators (120) vertically adjacent to each other on the lower end surface of the same insulating tray (111) have the same polarization direction, the piezoelectric vibrators (120) vertically adjacent to each other on the upper end surface of the same insulating tray (111) have the same polarization direction, cymbal-shaped metal caps of the piezoelectric vibrators (120) vertically adjacent to each other on the upper end surface of the adjacent insulating tray (111) are connected by a conductive medium (112), the cymbal-shaped metal caps of the piezoelectric vibrators (120) vertically adjacent to each other on the same end surface of the insulating tray (111) are connected by a wire, and the piezoelectric vibrators (120) are connected in parallel.
7. The orbital vibration energy recovery device according to claim 6, wherein the upper and lower end faces of the first casing (110) are each of a planar design and are connected to cymbal-type metal caps of the piezoelectric vibrator (120) through an insulating medium.
8. The orbital vibration energy recovery device of claim 2 wherein the first housing (110) has a shock pad (113) on an upper end surface thereof.
9. The orbital vibration energy recovery device according to claim 1, wherein the vibration coupling mechanism (200) comprises an upper pressing plate (210) and a lower pressing plate (220), and a return spring (230) arranged between the upper pressing plate (210) and the lower pressing plate (220), wherein the upper pressing plate (210) is used for supporting the piezoelectric power generation device (100), and the lower pressing plate (220) is used for driving the input side of the mechanical transmission power generation device (300) under the elastic force of the return spring (230).
10. The orbital vibration energy recovery device according to claim 9, wherein the mechanical transmission power generation device (300) comprises a chimney-shaped second housing (310), a piston (320), a connecting rod (330), a crank arm (340), an eccentric shaft (350), a speed-increasing gear box (360) in transmission connection with the eccentric shaft (350), and a power generator (370) in transmission connection with the speed-increasing gear box (360), wherein the output end of the power generator (370) is electrically connected with the input end of the energy collecting and storing device, one end of the connecting rod (330) is detachably connected with the piston (320), the other end of the connecting rod (330) is rotatably connected with the crank arm (340), and the upper pressure plate (210), the lower pressure plate (220) and the return spring (230) are all arranged in the second housing (310), the upper pressing plate (210) and the lower pressing plate (220) are vertically arranged, and the lower pressing plate (220) is used for driving the piston (320) to reciprocate along the height direction of the second shell (310).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120707102.2U CN214799328U (en) | 2021-04-07 | 2021-04-07 | Track vibration energy recovery device |
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| CN202120707102.2U CN214799328U (en) | 2021-04-07 | 2021-04-07 | Track vibration energy recovery device |
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| CN214799328U true CN214799328U (en) | 2021-11-19 |
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