CN110752776A - Telescopic pipeline flows energy accumulator - Google Patents
Telescopic pipeline flows energy accumulator Download PDFInfo
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- CN110752776A CN110752776A CN201910455707.4A CN201910455707A CN110752776A CN 110752776 A CN110752776 A CN 110752776A CN 201910455707 A CN201910455707 A CN 201910455707A CN 110752776 A CN110752776 A CN 110752776A
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- 239000000758 substrate Substances 0.000 claims abstract description 13
- 238000005452 bending Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 9
- 239000012530 fluid Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/185—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
Abstract
The invention relates to a telescopic pipeline flow energy harvester, and belongs to the technical field of new energy and pipeline monitoring. A shell is arranged in the pipeline, and an end cover is arranged at the end part of the side wall of the shell; an inner pin hole is formed in the center of a vertical plate of the support, and transverse plates with inclined mounting surfaces are arranged at the upper end and the lower end of the same side of the vertical plate; the left side and the right side of the exciter are respectively provided with a left pin and a right pin, the upper side and the lower side of the exciter are respectively provided with a plurality of cams along the axial direction of the left pin and the right pin, and the cam surfaces are composed of a bottom surface, an inclined surface and a top surface which are connected in sequence; the exciter is arranged in the shell, the left pin extends out of the bottom wall of the shell, and the end part of the left pin is provided with a blunt body; a support spring and a buffer spring are respectively sleeved on left pins on the left side and the right side of the shell bottom wall; a vertical plate of the bracket is arranged on a right pin through an inner pin hole, and a left spring and a right spring are respectively sleeved on the right pin on the left side and the right side of the vertical plate; one end of the piezoelectric vibrator is arranged on the mounting surface of the bracket, the piezoelectric vibrator is of a cantilever beam structure formed by bonding a substrate and a piezoelectric sheet, a top block at the free end of the piezoelectric vibrator abuts against the cam surface, and the top block is contacted with the middle point of the inclined surface of the cam during non-working.
Description
Technical Field
The invention belongs to the technical field of new energy and oil and gas pipeline monitoring systems, and particularly relates to a telescopic pipeline flow energy harvester.
Background
The leakage of the oil and gas pipeline caused by natural corrosion, ineffectiveness in the natural world, especially artificial theft, etc. occurs occasionally during the operation of the oil and gas pipeline, which not only causes huge economic loss, but also causes serious pollution to the surrounding natural environment. In the past, the pipeline leakage monitoring or anti-theft system is maintained by a manual inspection method, but because the pipeline is long in laying distance and is often positioned in places which are rare or inconvenient to traffic, leakage is difficult to find and maintain in time, so that various types of pipeline leakage monitoring or anti-theft systems are proposed successively by people, and some technologies are mature; but the power supply problem of the current oil and gas pipeline monitoring system is not well solved: the cable laying cost is high, the cable is easy to be cut off by lawless persons to influence the normal operation of the monitoring system, the service time is limited when the battery is powered, the monitoring system needs to be frequently replaced, and once the battery is insufficient in electric quantity and is not replaced in time, the remote transmission of monitoring information cannot be completed. Therefore, the novel self-generating technology or the novel self-generating technology can provide effective energy guarantee for popularization and application of the oil and gas pipeline monitoring technology.
Disclosure of Invention
The invention provides a telescopic pipeline flow energy harvester, which adopts the following implementation scheme: the inner wall of the pipeline is provided with a shell through a radial plate, and the end part of the side wall of the shell is provided with an end cover through a screw; an inner pin hole is formed in the center of a vertical plate of the support, transverse plates are arranged at the upper end and the lower end of the same side of the vertical plate, inclined mounting surfaces are arranged on the transverse plates, the mounting surfaces are located on the hole walls of the transverse plates, an acute angle formed by the mounting surfaces and the transverse plates is a mounting angle, and the mounting angle is larger than 30 degrees; the left side and the right side of the exciter are respectively provided with a left pin and a right pin which are coaxial, the upper side and the lower side of the exciter are respectively provided with a plurality of cams along the axial direction of the left pin and the right pin, the cams are moving cams, the cam surfaces of the cams are composed of bottom surfaces, inclined surfaces and top surfaces which are sequentially connected, the distance between the bottom surfaces and the top surfaces is a cam lift range, an acute angle formed between the bottom surfaces and the inclined surfaces is a cam lead angle, and the cam lead angle is 30-50 degrees; the exciter is arranged in a body cavity of the shell, the left pin extends out of an outer guide hole in the bottom wall of the shell, the end part of the left pin is provided with a blunt body through a nut, the blunt body is composed of an elastic sheet and rigid sheets clamped by two sides of the elastic sheet, and the ratio of the radius of the rigid sheets to the radius of the elastic sheet is 0.4-1; a support spring and a buffer spring are respectively sleeved on left pins on the left side and the right side of the shell bottom wall, the support spring is pressed between the blunt body and the shell bottom wall, and the buffer spring is pressed between the shell bottom wall and the exciter; a vertical plate of the bracket is arranged on a right pin through an inner pin hole, a left spring and a right spring are respectively sleeved on the right pin on the left side and the right side of the vertical plate, the right end of the right spring abuts against a stop block at the end part of the right pin, and the stop block is arranged at the end part of the right pin through a screw; the frequency modulation block is arranged on the bracket through a screw, and the outer edge of the frequency modulation block is in clearance fit with the inner wall of the body cavity; one end of the piezoelectric vibrator is arranged on the mounting surface of the bracket through a screw and a pressing strip, the piezoelectric vibrator is of a cantilever beam structure formed by bonding a substrate with equal thickness and a piezoelectric sheet, the substrate is arranged close to the exciter, the free end of the piezoelectric vibrator is provided with a top block through a screw, and the top block abuts against the cam surface; when the piezoelectric vibrator is not in work, the top block is in contact with the middle point of the inclined plane of the cam, the pre-bending deformation generated by the installation of the piezoelectric vibrator is half of the allowable deformation of the piezoelectric vibrator, and the allowable deformation of the piezoelectric vibrator is greater than the lift of the cam.
In the invention, the piezoelectric vibrator is in a straight or pre-bending structure in a natural state before being installed, the pre-bending radius of the substrate is smaller than that of the piezoelectric sheet when the piezoelectric vibrator is in the pre-bending structure before being installed, and the pre-bending radius of the bonding surface of the substrate and the piezoelectric sheet is
Before installation, the piezoelectric vibrator has a straight structure, and when two layers of fixed ends of the piezoelectric vibrator are clamped, the allowable deformation of the piezoelectric vibrator isIn the above formula, l and h are the cantilever length and total thickness of the piezoelectric vibrator, respectively, and β ═ Em/Ep，EmAnd EpThe modulus of elasticity, T, of the substrate and piezoelectric sheet material, respectivelypAnd k31Respectively, the allowable stress and the electromechanical coupling coefficient of the piezoelectric sheet material.
When the passive body and the exciter work, the hydrodynamic pressure makes the passive body and the exciter move to the right, when the passive body reaches a dynamic balance state under the combined action of the hydrodynamic pressure, the support spring and the buffer spring, the vortex-induced vibration generated by the passive body under the action of the fluid also enables the exciter to vibrate left and right through the left pin, the exciter enables the bracket and the piezoelectric vibrator to vibrate left and right along the right pin through the left spring and the right spring, the piezoelectric vibrator generates reciprocating bending deformation along the inclined plane of the cam by relative motion of the piezoelectric vibrator and the exciter, so that mechanical energy is converted into electric energy, the deformation process of the piezoelectric vibrator is as follows, ① the exciter leaves the balance position and enables the top block at the free end of the piezoelectric vibrator to ascend along the inclined plane of the cam, the deformation of the piezoelectric vibrator gradually increases, the deformation of the piezoelectric vibrator reaches the maximum when the top block is in contact with the top surface of the cam and does not increase along with the continuous movement of the exciter, ② the deformation of the exciter when the exciter leaves the balance position and enables the top block to descend along the inclined plane of the cam, the top block, the deformation of the piezoelectric vibrator gradually decreases, the deformation of the piezoelectric vibrator when the top block is in contact with the bottom surface of the cam, the piezoelectric vibrator, the vibration system can only maintain the high-pressure-frequency-frequency synchronous vibration-frequency.
Advantages and features: the piezoelectric vibrator is not directly coupled with the fluid, the dynamic performance is not influenced by the fluid, and the piezoelectric vibrator is easy to ensure through design; the piezoelectric vibrator is bent and deformed in one direction, the deformation amount is controllable, and the maximum deformation of the piezoelectric vibrator is smaller than the lift range of the cam, so that the power generation capacity is high and the reliability is high; the energy harvester is a two-degree-of-freedom system, the exciter synchronously excites a plurality of piezoelectric vibrators, and the vibration response characteristic of the exciter is easy to adjust through the rigidity and the mass of a spring, so that the energy harvester is high in power generation capacity and wide in effective frequency band.
Drawings
FIG. 1 is a schematic diagram of an energy harvester according to a preferred embodiment of the invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is an enlarged view of section I of FIG. 1;
FIG. 4 is a schematic diagram of the exciter in accordance with a preferred embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the conduit and housing in accordance with a preferred embodiment of the present invention;
FIG. 6 is a schematic view of the structure of the stand according to a preferred embodiment of the present invention.
Detailed Description
A shell a is arranged on the inner wall of the pipeline G through a web plate G1, and an end cover b is arranged at the end part of the side wall a2 of the shell a through a screw; an inner pin hole c2 is formed in the center of a vertical plate c1 of the bracket c, transverse plates c4 are arranged at the upper end and the lower end of the same side of the vertical plate c1, inclined mounting surfaces c5 are arranged on the transverse plates c4, the mounting surfaces c5 are located on hole walls of the transverse plates c4, an acute angle c6 formed by the mounting surfaces c5 and the transverse plates c4 is a mounting angle, and the mounting angle is larger than 30 degrees; the left end and the right end of the exciter f are respectively provided with a left pin f4 and a right pin f7, the left pin f4 and the right pin f7 are coaxial, the upper side and the lower side of the exciter f are both provided with a plurality of cams f0 along the axial direction of the left pin f4 and the right pin f7, the cams f0 are moving cams, the cam surface of each cam f0 is composed of a bottom surface f1, an inclined surface f2 and a top surface f3 which are sequentially connected, the distance f5 between the bottom surface f1 and the top surface f3 is a cam lift, the acute angle f6 formed between the bottom surface f1 and the inclined surface f2 is a cam lift angle, and the cam lift angle is 30-50 degrees; the exciter f is arranged in a body cavity a3 of the shell a, a left pin f4 extends out of an outer guide hole in a bottom wall a1 of the shell, a blunt body n is arranged at the end part of the left pin f4 through a nut, the blunt body n is composed of an elastic sheet n1 and a rigid sheet n2 clamped at two sides of the elastic sheet n1, and the ratio of the radius of the rigid sheet n2 to the radius of the elastic sheet n1 is 0.4-1; a support spring k1 and a buffer spring k2 are respectively sleeved on left pins f4 at the left side and the right side of the shell bottom wall a1, the left end and the right end of the support spring k1 are respectively abutted against the bluff body n and the shell bottom wall a1, and the left end and the right end of the buffer spring k2 are respectively abutted against the shell bottom wall a1 and the exciter f; a vertical plate c1 of a bracket c is arranged on a right pin f7 through an inner pin hole c2, a left spring k3 and a right spring k4 are respectively sleeved on the right pin f7 on the left side and the right side of the vertical plate c1, the right end of the right spring k4 abuts against a stop block j at the end part of the right pin f7, the stop block j is arranged at the end part of a right pin f7 through a screw, the stop block j is also a frequency modulation mass block, and the outer edge of the stop block j is in clearance fit with the inner edge of the frequency modulation block i; the frequency modulation block i is arranged on the bracket c through a screw, and the outer edge of the frequency modulation block i is in contact with the inner wall of the body cavity a3 of the shell a and is in clearance fit with the inner wall; one end of a piezoelectric vibrator d is mounted on a mounting surface c5 of a bracket c through a screw and a pressing strip e, the piezoelectric vibrator d is of a cantilever beam structure formed by bonding a substrate d1 and a piezoelectric sheet d2 which are of equal thickness, the substrate d1 is mounted close to an exciter f, a top block d3 is mounted at the free end of the piezoelectric vibrator d through a screw, and a top block d3 abuts against a cam surface; when the piezoelectric vibrator d is not in operation, the top block d3 is in contact with the middle point of the inclined surface f2 of the cam f0, the pre-bending deformation amount generated by the installation of the piezoelectric vibrator d is half of the allowable deformation amount of the piezoelectric vibrator d, and the allowable deformation amount of the piezoelectric vibrator d is larger than the lift of the cam.
In the invention, the piezoelectric vibrator d is in a straight or pre-bending structure in a natural state before being installed, the pre-bending radius of the substrate d1 is smaller than that of the piezoelectric sheet d2 when the piezoelectric vibrator d is in the pre-bending structure before being installed, and the pre-bending radius of the bonding surface of the substrate d1 and the piezoelectric sheet d2 is equal to that of the piezoelectric sheet d2
When the piezoelectric vibrator d is in a straight structure before being installed and two layers of fixed ends of the piezoelectric vibrator d are clamped, the allowable deformation of the piezoelectric vibrator d is
In the above formula, l and h are the cantilever length and total thickness of the piezoelectric vibrator d, respectively, and β ═ Em/Ep，EmAnd EpThe elastic moduli, T, of the materials of the substrate d1 and the piezoelectric sheet d2pAnd k31The allowable stress and electromechanical coupling coefficient of the piezoelectric sheet d2 material, respectively.
When the passive body n and the exciter f move rightwards under the combined action of the fluid dynamic pressure, the support spring k1 and the buffer spring k2, the vortex-induced vibration generated by the passive body n under the action of the fluid also enables the exciter f to vibrate leftwards and rightwards through the left pin f4, the exciter f enables the bracket c and the piezoelectric vibrator d to vibrate leftwards and rightwards along the right pin f7 through the left spring k3 and the right spring k4, the relative motion of the piezoelectric vibrator d and the exciter f enables the piezoelectric vibrator d to generate reciprocating bending deformation along the inclined plane f0 of the cam f0 so as to convert mechanical energy into electric energy, the deformation process of the piezoelectric vibrator d is as follows, when the exciter f of the piezoelectric vibrator f leaves the balance position and enables the top block d 0 at the free end of the piezoelectric vibrator d to ascend along the inclined plane f0 of the cam f0, the deformation amount of the piezoelectric vibrator d gradually increases, the deformation amount of the piezoelectric vibrator d reaches the maximum amount when the top block d 0 contacts the top surface f0 f of the cam f0, the top block 0, the vibration system is enabled to be easily reduced along the lift force of the top surface 0, and the top surface of the piezoelectric vibrator f, the piezoelectric vibrator d 0, the lift force of the top cam 0 is easily reduced, and the lift force of the top surface 0, the top surface 0 is easily reduced, and the lift force of the top surface 0, and the lift force of the top cam 0 d is easily reduced, and the lift force of the top cam 0, the lift system 0 d is easily reduced.
Claims (1)
1. The utility model provides a telescopic pipeline flows energy accumulator which characterized in that: the inner wall of the pipeline is provided with a shell through a radial plate, and the end part of the side wall of the shell is provided with an end cover; an inner pin hole is formed in the center of a vertical plate of the support, transverse plates are arranged at the upper end and the lower end of the same side of the vertical plate, and inclined mounting surfaces are arranged on the transverse plates; the left side and the right side of the exciter are respectively provided with a left pin and a right pin, the upper side and the lower side of the exciter are respectively provided with a plurality of cams along the axial direction of the left pin and the right pin, the cam surface consists of a bottom surface, an inclined surface and a top surface which are sequentially connected, and the lift angle of the cams is 30-50 degrees; the exciter is arranged in a body cavity of the shell, the left pin extends out of the outer guide hole in the bottom wall of the shell, the end part of the left pin is provided with a blunt body, the blunt body consists of an elastic sheet and rigid sheets clamped by two sides of the elastic sheet, and the ratio of the radius of the rigid sheets to the radius of the elastic sheet is 0.4-1; a support spring and a buffer spring are respectively sleeved on left pins on the left side and the right side of the shell bottom wall, the support spring is pressed between the blunt body and the shell bottom wall, and the buffer spring is pressed between the shell bottom wall and the exciter; a vertical plate of the bracket is arranged on a right pin through an inner pin hole, a left spring and a right spring are respectively sleeved on the right pin on the left side and the right side of the vertical plate, and the right end of the right spring abuts against a stop block at the end part of the right pin; the frequency modulation block is arranged on the bracket, and the outer edge of the frequency modulation block is in clearance fit with the inner wall of the body cavity; one end of the piezoelectric vibrator is arranged on the mounting surface of the bracket, the piezoelectric vibrator is of a cantilever beam structure formed by bonding a substrate with equal thickness and a piezoelectric sheet, the substrate is arranged close to the exciter, and the free end of the piezoelectric vibrator is provided with a top block which abuts against the cam surface; when the piezoelectric vibrator does not work, the top block is contacted with the middle point of the inclined plane of the cam, the pre-bending deformation generated by the installation of the piezoelectric vibrator is half of the allowable deformation of the piezoelectric vibrator, and the allowable deformation of the piezoelectric vibrator is greater than the lift of the cam; the top block keeps in contact with the top surface of the cam when the buffer spring is pressed, and the top block keeps in contact with the bottom surface of the cam when the left spring is pressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910455707.4A CN110752776B (en) | 2019-05-18 | 2019-05-18 | Telescopic pipeline flows energy accumulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910455707.4A CN110752776B (en) | 2019-05-18 | 2019-05-18 | Telescopic pipeline flows energy accumulator |
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| CN110752776A true CN110752776A (en) | 2020-02-04 |
| CN110752776B CN110752776B (en) | 2021-10-08 |
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