CN114938163A - Simple vibration isolation energy harvesting multifunctional structure - Google Patents
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- CN114938163A CN114938163A CN202210673325.0A CN202210673325A CN114938163A CN 114938163 A CN114938163 A CN 114938163A CN 202210673325 A CN202210673325 A CN 202210673325A CN 114938163 A CN114938163 A CN 114938163A
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- 238000003306 harvesting Methods 0.000 title claims abstract description 68
- 238000002955 isolation Methods 0.000 title claims abstract description 56
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 74
- 239000010959 steel Substances 0.000 claims abstract description 74
- 238000010248 power generation Methods 0.000 claims abstract description 36
- 239000000725 suspension Substances 0.000 claims abstract description 19
- 230000005611 electricity Effects 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 39
- 230000005284 excitation Effects 0.000 claims description 22
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 18
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 18
- 239000004033 plastic Substances 0.000 claims description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000011229 interlayer Substances 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 5
- 230000004044 response Effects 0.000 description 25
- 238000004458 analytical method Methods 0.000 description 19
- 238000004088 simulation Methods 0.000 description 19
- 230000001052 transient effect Effects 0.000 description 17
- 230000001133 acceleration Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram 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
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229920000297 Rayon Polymers 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
- H02N2/186—Vibration harvesters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
- F16F15/085—Use of both rubber and metal springs
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Abstract
The invention discloses a simple vibration isolation energy harvesting multifunctional structure which consists of one or more vibration isolation energy harvesting mechanisms, wherein each vibration isolation energy harvesting mechanism consists of a steel frame, a piezoelectric energy harvesting module and a friction power generation energy harvesting module; the steel frame consists of two parallel steel cover plates and steel webs arranged at two ends of the steel cover plates oppositely, the steel webs are arc-shaped steel plates, and a groove is formed in the center of the inner side of each steel web; the piezoelectric energy harvesting module is formed by sequentially attaching a first insulating layer, a piezoelectric layer and a second insulating layer; the friction power generation energy capturing module consists of a rubber suspension layer, a nanometer friction power generation vibrator and a spring. The invention overcomes the problems that the upper limit of the load design of the existing vibration isolation and energy harvesting structure is limited by a spring, the piezoelectric energy harvesting and the displacement of a vertical spring are not directly related, and a negative Poisson ratio structure such as a slide block needs to be additionally added to drive a piezoelectric plate to deform and harvest energy to generate electricity.
Description
Technical Field
The invention relates to the field of vibration isolation and kinetic energy conversion, in particular to a simple vibration isolation and energy harvesting multifunctional structure.
Background
With the rapid development of scientific technology, high speed of machinery and light weight of structures, a large amount of engineering vibration problems are continuously emerged, the deterioration of the working state of the machinery is caused, the production efficiency and the working quality are reduced, and the application of vibration isolation is gradually emphasized by people. Mechanical vibration is often the direct cause of malignant damage and failure of machinery and structures, and the current requirements on energy conservation and multifunctional output of a system cannot be met only by adopting a single vibration isolator or vibration isolation structure design.
According to the existing vibration isolation and energy harvesting coupling structure, system bearing is mainly guaranteed by the pre-tightening compression stiffness of the spring, eccentric wear is easily caused when the system bears a transverse load, the transverse vibration isolation stiffness cannot be guaranteed, the upper limit of load design is limited by the spring, piezoelectric energy harvesting energy is not directly related to the displacement of the vertical spring, and a negative Poisson ratio structure such as a sliding block is additionally added to drive the piezoelectric plate to deform and harvest energy to generate electricity.
Disclosure of Invention
The invention provides a simple vibration isolation energy harvesting multifunctional structure, which aims to solve the problems that the upper limit of the load design of the existing vibration isolation and energy harvesting coupling structure is limited by a spring, the piezoelectric energy harvesting is not directly related to the displacement of a vertical spring, and a negative Poisson ratio structure such as a sliding block needs to be additionally added to drive a piezoelectric plate to deform and harvest energy to generate power.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the invention provides a simple vibration isolation and energy harvesting multifunctional structure which is composed of one or more vibration isolation and energy harvesting mechanisms, wherein each vibration isolation and energy harvesting mechanism is composed of a steel frame, piezoelectric energy harvesting modules and friction power generation energy harvesting modules; the steel frame consists of two parallel steel cover plates and steel webs arranged at two ends of the steel cover plates oppositely, the steel webs are arc-shaped steel plates, and a groove is formed in the center of the inner side of each steel web; the piezoelectric energy harvesting module is formed by sequentially attaching a first insulating layer, a piezoelectric layer and a second insulating layer; the friction power generation energy harvesting module consists of a rubber suspension interlayer, a nanometer friction power generation vibrator and a spring, wherein the rubber suspension interlayer is an elastic rubber plate, a plurality of bulges are arranged on the upper surface of the rubber suspension interlayer, and the spring is arranged on the bulges; the lower end of the nanometer friction power generation vibrator is inserted into the spring.
Furthermore, a plurality of the bulges are arranged in a rectangular array.
Further, the nanometer friction power generation vibrator is a stepped cylinder made of rubber, and the stepped cylinder comprises a lower cylinder and an upper cylinder; the lower cylinder is connected with the spring, the upper cylinder is of an inner cavity structure and consists of a plastic ball made of PTFE (polytetrafluoroethylene), copper sheets and a rubber shell, the copper sheets are respectively attached to the upper plane and the lower plane of the inner cavity of the rubber shell, and the plastic ball made of movable PTFE is arranged in the middle of the inner cavity.
Furthermore, the copper sheets on the upper plane and the lower plane of the upper cylindrical inner cavity of the nanometer friction power generation vibrator are led out of a friction power generation output lead for being externally connected with an electric energy module and a friction power generation on-line monitoring parameter module.
Furthermore, a piezoelectric output lead is led out among the first insulating layer, the piezoelectric layer and the second insulating layer and is used for being externally connected with an electric energy module and a piezoelectric online monitoring parameter module.
Further, the mass m of the nanometer friction generating vibrator and the rigidity k of the spring and the external excitation frequency f satisfy the following relational expression:
the units of m are kg and the units of k are N/m.
The invention has the following beneficial effects:
1. the steel frame is simple and stable in structure, the arc-shaped steel web serves as an elastic support, the piezoelectric patches are directly driven to deform through self deformation to generate energy, and a negative poisson ratio structure such as an additional sliding block is not needed; 2. the arc-shaped steel web plate is connected with the elastic rubber suspension partition plate to form a micro-motion elastic foundation, so that the friction power generation vibrator on the rubber suspension partition plate is excited to capture energy; 3. aiming at different bearing requirements, the bearing capacity of the structure is greatly improved by increasing the thickness of the arc-shaped steel web plate, meanwhile, the arc-shaped steel web plate can be combined into array arrangement, the requirements of vibration isolation and energy harvesting in a required frequency domain are met, and the application frequency and the load range are flexible and wide.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on the drawings without inventive labor.
FIG. 1 is a schematic view of an overall structure of a simple vibration isolation and energy harvesting multifunctional structure disclosed by the invention;
FIG. 2 is an isometric view of a simple vibration isolation and energy harvesting multifunctional structure disclosed in the present invention;
FIG. 3 is a schematic diagram of an application of a simple vibration isolation energy harvesting multifunctional structural array disclosed in the present invention;
FIG. 4 is an isometric view of a steel frame structure in the simple vibration isolation and energy harvesting multifunctional structure disclosed by the invention;
FIG. 5 is an isometric view of a rubber suspension separation layer with springs and nano friction generating vibrators in a simple vibration isolation and energy harvesting multifunctional structure disclosed by the invention;
FIG. 6 is an isometric view of a raised rubber suspension layer in a simple vibration isolation and energy harvesting multifunctional structure disclosed by the invention;
FIG. 7a is a detailed view of a spring structure in a simple vibration isolation and energy harvesting multifunctional structure disclosed in the present invention;
FIG. 7b is a detailed structural view of a simple vibration isolation energy harvesting multifunctional structural nano friction power generation vibrator disclosed in the present invention;
FIG. 7c is a detailed structural view of an inner cavity of a nano friction power generation vibrator in the simple vibration isolation and energy harvesting multifunctional structure disclosed by the invention;
FIG. 8 is a schematic diagram of an analog simulation structure of a simple vibration isolation and energy harvesting multifunctional structure disclosed in the present invention;
FIG. 9a is a graph showing the results of a displacement distribution simulation of the structure of FIG. 8 under a vertical force of 200N;
FIG. 9b is a simulation of the stress distribution of the structure of FIG. 8 under a vertical force of 200N;
FIG. 10 is an analysis boundary diagram of the structure shown in FIG. 8;
FIG. 11a shows that the acceleration value of FIG. 9 is 10m/s under the vibration condition of 1 to 10000Hz 2 Time, vibration energy level difference in the frequency domain;
FIG. 11b is a graph showing that the acceleration value of FIG. 9 is 10m/s under the vibration condition of 1 to 10000Hz 2 The acceleration vibration level drop in the frequency domain;
FIG. 12a is a vibration energy level difference simulation of the transient response analysis of FIG. 8 at 1Hz as the excitation frequency;
FIG. 12b is the acceleration step drop simulation result of the transient response analysis of FIG. 8 at 1Hz as the excitation frequency;
FIG. 12c is a piezoelectric voltage simulation of the transient response analysis of FIG. 8 at 1Hz as the excitation frequency;
FIG. 12d is a simulation of the speed of the PTFE plastic ball of FIG. 8 at 1Hz for transient response analysis;
FIG. 13a is the vibration energy level difference simulation result of the transient response analysis of FIG. 8 at 2Hz for the excitation frequency;
FIG. 13b is the acceleration step drop simulation result of the transient response analysis of FIG. 8 at 2Hz for the excitation frequency;
FIG. 13c is a piezoelectric voltage simulation of the transient response analysis of FIG. 8 at 2 Hz;
FIG. 13d is a simulation of the speed of the PTFE plastic ball of FIG. 8 at 2Hz for transient response analysis;
FIG. 14a is the vibration energy level difference simulation results of the transient response analysis of FIG. 8 at 3Hz for the excitation frequency;
FIG. 14b is the acceleration step drop simulation result of the transient response analysis of FIG. 8 at 3Hz for the excitation frequency;
FIG. 14c is a piezoelectric voltage simulation of the transient response analysis of FIG. 8 at 3Hz as the excitation frequency;
FIG. 14d is a simulation of the speed of the PTFE plastic ball of FIG. 8 at 3Hz for transient response analysis;
FIG. 15a is the vibration energy level difference simulation results of the transient response analysis of FIG. 8 at 4Hz for the excitation frequency;
FIG. 15b is the acceleration step drop simulation result of the transient response analysis of FIG. 8 at 4Hz for the excitation frequency;
FIG. 15c is a piezoelectric voltage simulation of the transient response analysis of FIG. 8 at 4Hz for the excitation frequency;
FIG. 15d is the result of a PTFE plastic ball velocity simulation of the transient response analysis of FIG. 8 at 4 Hz;
in the figure: 1. the vibration isolation energy harvesting device comprises a steel frame, 11, a steel cover plate, 12, a steel web plate, 2, a first insulation layer, 3, a piezoelectric layer, 4, a second insulation layer, 5, a rubber suspension layer, 51, a protrusion, 6, a nano friction power generation vibrator, 61, a lower cylinder, 62 an upper cylinder, 621, a plastic ball, 622, a copper sheet, 623, a rubber shell, 624, a friction power generation output lead, 7, a piezoelectric output lead, 8, a spring, 91, mechanical equipment, 92 and a simple vibration isolation energy harvesting multifunctional structure and an array thereof, 93 and a base body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 7c, a simple vibration isolation energy harvesting multifunctional structure is composed of one or more vibration isolation energy harvesting mechanisms, each vibration isolation energy harvesting mechanism is composed of a steel frame 1, a piezoelectric energy harvesting module and a friction power generation energy harvesting module, the piezoelectric energy harvesting modules are attached to the outer sides of steel webs 12 on two sides of the steel frame through adhesives, and two ends of a rubber suspension layer 5 of each friction power generation energy harvesting module are installed in grooves of the steel webs 12; as shown in fig. 4, the steel frame 1 is composed of two parallel steel cover plates 11 with a width of 60mm and steel web plates 12 with a width of 60mm and a thickness of 1mm, which are oppositely arranged at two ends of the steel cover plates, wherein the steel web plates 12 are arc-shaped steel plates, and a groove is arranged at the center of the inner side of each steel web plate 12; the piezoelectric energy harvesting module is formed by sequentially laminating a first insulating layer 2, a piezoelectric layer 3 and a second insulating layer 4, wherein the piezoelectric layer is made of a PZT material with the thickness of 1mm, and the first insulating layer and the second insulating layer are both made of rubber plates with the thickness of 0.5 mm; the friction power generation energy harvesting module consists of a rubber suspension layer 5, a nanometer friction power generation vibrator 6 and a spring 8, wherein the rubber suspension layer 5 is a rubber plate with the hardness of 60HA, and a plurality of protrusions 51 are arranged on the upper surface of the rubber plate; the spring 8 is arranged on the bulge 51, and the lower end of the nanometer friction power generation vibrator 6 is inserted into the spring 8.
Based on the above, according to the application, a negative Poisson ratio structure such as a sliding block does not need to be additionally added to drive the piezoelectric plate to deform to generate power, the elastic support can be formed by bending and deforming the arc-shaped steel web plate of the steel frame when two ends of the arc-shaped steel web plate are stressed, according to the negative Poisson ratio effect, the vertical displacement of the structure of the steel frame during excitation is converted into the transverse displacement of the arc-shaped steel web plate, and the piezoelectric layer attached to the outer side of the arc-shaped steel web plate converts the vibration energy into the electric energy. The arc steel web of steelframe links to each other with elastic rubber suspension layer, forms fine motion elastic foundation, arranges spring and nanometer friction electricity generation oscillator on rubber suspension layer, further turns into the electric energy with vibration energy, and when friction nanometer electricity generation oscillator took place to resonate under the excitation, nanometer friction electricity generation can increase suddenly, and the load design upper limit also need not to receive the restriction of spring.
In a specific embodiment, the steel web 12 is a steel plate with an arc-shaped edge line satisfying sine line sin (pi x h), where h is a vertical inner distance between upper and lower steel cover plates of a steel frame, and the vertical inner distance between the upper and lower steel cover plates of the steel frame is 50 mm.
In a particular embodiment, the groove length is the same as the steel web 12 width. The groove depth is 1/5 times the thickness of the steel web 12.
In a specific embodiment, the protrusions 51 are arranged in a 3 × 7 rectangular array, the height of the protrusions is 2mm, and the diameter of the protrusions is 2 mm.
In a specific embodiment, the nano friction power generation vibrator 6 is a stepped cylinder made of rubber, the stepped cylinder comprises a lower cylinder 61 and an upper cylinder 62, the height of the lower cylinder is 2mm, the diameter of the lower cylinder is 2mm, the height of the upper cylinder is 3mm, and the diameter of the upper cylinder is 4 mm; wherein cylinder 61 down with spring 8 is connected, it is the inner chamber structure to go up cylinder 61, and inner chamber diameter is 3mm, highly is 3mm, it comprises plastic ball 621, copper sheet 622 and the rubber casing 623 of PTFE material to go up cylinder 61, two upper and lower planes of rubber casing 623 inner chamber adopt the viscose to paste the copper sheet 622 that thickness is 0.1mm respectively, are provided with mobilizable diameter in the middle of the inner chamber and are 2 mm's plastic ball 621 of PTFE material, and PTFE material friction factor is little, can reduce with the loss of copper sheet friction in-process energy.
In a specific embodiment, as shown in fig. 7c, a friction power generation output lead 624 is led out from the copper sheets 622 on the upper and lower planes of the inner cavity of the upper cylinder 62 of the nano friction power generation vibrator 6, and is used for externally connecting an electric energy module and a friction power generation on-line parameter monitoring module.
In a specific embodiment, as shown in fig. 1, a piezoelectric output lead 7 is led out from among the first insulating layer 2, the piezoelectric layer 3 and the second insulating layer 4, and is used for externally connecting a power module and a piezoelectric online parameter monitoring module.
In a specific embodiment, the mass m of the nano-friction electricity generating vibrator 6 and the stiffness k of the spring 8 and the external excitation frequency f satisfy the following relation:
the units of m are kg and the units of k are N/m.
The piezoelectric output lead 7 and the friction power generation output lead 624 can be connected with an external electric energy module to collect electric energy converted by vibration on one hand, and on the other hand, because the energy harvesting electric quantity and the excitation have obvious rules, the electric quantity can be used as an identification signal of an external load, and the piezoelectric output lead 7 and the friction power generation output lead 624 are connected with an external online monitoring parameter module, so that data can be collected, summarized and analyzed, the online monitoring of vibration response parameters is realized, and convenience is provided for subsequent research work.
In a specific embodiment, as shown in fig. 3, the simple vibration isolation and energy harvesting multifunctional structure and the array 92 thereof can disperse and bear the vibration of the mechanical equipment 91 on the fixed substrate 93, and the invention can be used for engineering equipment and structures with different specifications by adjusting the thickness of the steel web and the number of the vibration isolation and energy harvesting structures, and is particularly suitable for large-scale engineering equipment used in the field of ships.
To better explain the simple vibration isolation energy harvesting structure, an ideal model is established, as shown in fig. 8, the thickness of an arc-shaped steel web of a steel frame is 1mm, a rubber suspension layer is made of a rubber plate with the thickness of 2mm and the hardness of 60HA, a spring nanometer friction generating vibrator is simulated by a cylindrical rubber shell, a movable PTFE plastic ball with the diameter of 2mm is arranged in an inner cavity of the rubber shell, and piezoelectric layers made of PZT-5A materials with the thickness of 1mm are attached to two sides of the outer side of the steel frame.
Fixing the displacement of the bottom edge of the steel frame shown in FIG. 8, applying a vertical downward force on the upper surface of the steel frame of 200N, and analyzing the result as shown in FIGS. 9a and 9b, wherein the maximum displacement is 0.10mm, and the maximum stress is less than 1.40 × 10 8 Pa。
When the vertical excitation is carried out, the vibration condition applied to the upper surface is 1-10000 Hz, and the acceleration value is 10m/s 2 The responses of the upper and lower steel cover plates of the steel frame and the upper and lower contact surfaces of the arc-shaped steel plate are extracted respectively, as shown in fig. 10, the responses are respectively the vibration responses of the response surface a, the response surface B, and the point a (the central point of the upper layer of the steel frame) and the point B (the central point of the lower layer of the steel frame).
To facilitate calculation and analysis of the vibration isolation effect, the acceleration a of the vibration response point a is analyzed a Acceleration a of point b b Input excitation energy J A Simple vibration isolation and energy harvestingExcitation energy J capable of being output by structure B 。
The vibration isolation effect parameters are defined as follows:
level difference of vibration energy
Difference of acceleration vibration level
When the vibration isolation effect of a vibration isolation device is evaluated, the vibration level drop is usually evaluated, the vibration level drop is calculated by adopting the acceleration, and is expressed by decibel form, generally, the larger the vibration level drop is, the better the vibration isolation effect of the vibration isolation device is, so that the vibration energy level difference shown in fig. 11a and the acceleration vibration level drop shown in fig. 11b can show that the excellent vibration isolation effect exists in the scheme.
Transient response analysis was performed with 1Hz, 2Hz, 3Hz and 4Hz excitation frequencies, respectively.
At the moment, the vertical exciting force F applied to the top surface of the steel sheet on the vibration isolation and noise reduction thin layer is (t is time):
at 1 Hz: f ═ 10 × sin (2 × pi × t) N
At 2 Hz: f-10 sin (4 π t) N
At 3 Hz: f-10 sin (6 π t) N
At 4 Hz: f ═ 10 × sin (8 × pi × t) N
The vibration response, the piezoelectric output voltage and the speed of the PTFE plastic ball in the stable operation period were extracted, as shown in fig. 12a to 15d, and the data results indicated that the vibration energy level difference could reach the level of-170 dB; the acceleration vibration level drop is at the level of 155 dB; the piezoelectric voltage is linearly related to the excitation frequency and presents a half-wave waveform; the speed of the PTFE plastic ball for realizing the friction power generation is as high as the level of 20mm/s to 60 mm/s. In the vibration isolation process, the lower the negative value of the vibration energy level difference is, the higher the positive value of the acceleration vibration level difference is, and the better the vibration isolation effect is. The larger the piezoelectric voltage amplitude is, the larger the energy harvesting electric energy is; the higher the speed of the PTFE plastic ball is, the more violent the collision friction of the PTFE plastic ball and the copper sheet is, and the more electric charges are generated. The piezoelectric voltage and the electric charge of the invention can obviously reflect the external excitation degree, therefore, the invention has excellent vibration isolation performance, energy harvesting capability and electric parameter output rule for vibration state perception.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. The simple vibration isolation energy harvesting multifunctional structure is characterized by comprising one or more vibration isolation energy harvesting mechanisms, wherein each vibration isolation energy harvesting mechanism comprises a steel frame (1), a piezoelectric energy harvesting module and a friction power generation energy harvesting module, the piezoelectric energy harvesting modules are arranged on the outer sides of steel webs (12) on two sides of the steel frame, and two ends of a rubber suspension layer (5) of each friction power generation energy harvesting module are arranged in grooves of the steel webs (12);
the steel frame (1) is composed of two parallel steel cover plates (11) and steel webs (12) oppositely arranged at two ends of the steel cover plates, the steel webs (12) are arc-shaped steel plates, and grooves are formed in the centers of the inner sides of the steel webs (12);
the piezoelectric energy harvesting module is formed by sequentially attaching a first insulating layer (2), a piezoelectric layer (3) and a second insulating layer (4);
the friction power generation energy harvesting module is composed of a rubber suspension interlayer (5), a nanometer friction power generation vibrator (6) and a spring (8), the rubber suspension interlayer (5) is an elastic rubber plate, and a plurality of protrusions (51) are arranged on the upper surface of the rubber suspension interlayer;
the spring (8) is arranged on the protrusion (51), and the lower end of the nanometer friction power generation vibrator (6) is inserted into the spring (8).
2. The simple vibration isolation and energy harvesting multifunctional structure according to claim 1, wherein a plurality of the protrusions (51) are arranged in a rectangular array.
3. The simple vibration isolation and energy harvesting multifunctional structure according to claim 1, wherein the nano friction electricity generating vibrator (6) is a stepped cylinder made of rubber, and the stepped cylinder comprises a lower cylinder (61) and an upper cylinder (62); lower cylinder (61) with spring (8) are connected, it has the inner chamber structure to go up cylinder (62), it comprises plastic ball (621), copper sheet (622) and rubber casing (623) of polytetrafluoroethylene PTFE material to go up the cylinder, copper sheet (622) have been pasted respectively to two upper and lower planes of the inner chamber of rubber casing (623), are provided with plastic ball (621) of mobilizable PTFE material in the middle of the inner chamber.
4. The simple vibration isolation energy harvesting multifunctional structure according to claim 4, wherein a friction power generation output lead (624) is led out from the copper sheets (622) on the upper plane and the lower plane of the inner cavity of the upper cylinder (62) of the nano friction power generation vibrator (6) and is used for being externally connected with an electric energy module and a friction power generation online monitoring parameter module.
5. The simple vibration isolation and energy harvesting multifunctional structure according to claim 1, wherein a piezoelectric output lead (7) is led out among the first insulating layer (2), the piezoelectric layer (3) and the second insulating layer (4) and is used for externally connecting an electric energy module and a piezoelectric online monitoring parameter module.
6. The simple vibration isolation and energy harvesting multifunctional structure according to claim 1, wherein the mass m of the nano friction electricity generating vibrator (6) and the stiffness k of the spring (8) and the external excitation frequency f satisfy the following relations:
the units of m are kg and the units of k are N/m.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219381A (en) * | 2019-07-03 | 2019-09-10 | 安徽工程大学 | A kind of lift granular pattern energy by collision damper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219381A (en) * | 2019-07-03 | 2019-09-10 | 安徽工程大学 | A kind of lift granular pattern energy by collision damper |
| CN110219381B (en) * | 2019-07-03 | 2024-04-26 | 安徽工程大学 | Lifting particle type collision energy dissipation damper |
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