A gravity-induced self-excited vibration friction nano energy harvester

Abstract

The present invention provides a gravity-induced self-excited vibration type friction nano energy collector, which relates to the technical field of energy collection and power generation equipment, and comprises a vertical guide rail, a sliding support assembly and a self-excited vibration assembly. Both the self-excited vibration assembly and the sliding support assembly are slidably arranged on the vertical guide rail along the vertical direction. A first electrode sheet is fixedly arranged on a partial structure of the self-excited vibration assembly that can generate self-excited vibration, and a second electrode sheet is fixedly arranged on the sliding support assembly. In the process of the self-excited vibration assembly sliding downward from the top of the vertical guide rail, the self-excited vibration assembly can generate self-excited vibration and drive the first electrode sheet to vibrate up and down. The first electrode sheet repeatedly contacts and separates from the second electrode sheet during the vibration process. The scheme provided by the present invention achieves a power generation effect with small impedance and large output by means of amplitude truncation of a resonant mass block, and has the advantages of simple manufacturing, light weight, low cost and high conversion efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of energy collection and power generation equipment, and in particular to a gravity-induced self-excited vibration type friction nano energy collector. Background Art

[0002] The friction nano-power generation device converts various types of mechanical energy into electrical energy through friction electrification. The principle is: when two different materials are in contact, their surfaces will generate positive and negative static charges due to contact electrification, and when the two materials are separated due to the action of mechanical force, the positive and negative charges generated by contact electrification will also separate. The charge separation will correspondingly generate an induced potential difference on the upper and lower electrodes of the material. If a load is connected to the two electrodes or they are in a short-circuit state, the induced potential difference will drive electrons to flow between the two electrodes through an external circuit. The friction nano-power generation device has the advantages of simple manufacturing, light weight, low cost and high conversion efficiency. In recent years, friction nano-power generation has been widely used in various fields such as energy collection, sensing and interaction. Friction nano-power generation has high instantaneous energy conversion efficiency, flexible and stable power generation materials and a wide range of energy collection. However, the existing technology lacks research on how to convert low-frequency mechanical energy into high-frequency vibration and use the principle of friction nano-power generation to achieve efficient energy conversion. Therefore, there is an urgent need for a device that can convert low-frequency mechanical energy into high-frequency vibration and use the principle of friction nano-power generation to achieve efficient energy conversion. Summary of the invention

[0003] The purpose of the present invention is to provide a gravity-induced self-excited vibration friction nano energy collector to solve the problems existing in the above-mentioned prior art, with a small impedance and large output power generation effect, and has the advantages of simple manufacturing, light weight, low cost and high conversion efficiency.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a gravity-induced self-excited vibration type friction nano energy collector, comprising a vertical guide rail, a sliding support assembly and a self-excited vibration assembly, wherein the self-excited vibration assembly and the sliding support assembly are both slidably arranged on the vertical guide rail along a vertical direction, a first electrode sheet is fixedly arranged on a partial structure of the self-excited vibration assembly that can generate self-excited vibration, a second electrode sheet is fixedly arranged on the sliding support assembly, and the second electrode sheet is arranged opposite to the first electrode sheet, and during the process of the self-excited vibration assembly sliding downward from the top of the vertical guide rail, the self-excited vibration assembly can generate self-excited vibration and drive the first electrode sheet to vibrate up and down, and the first electrode sheet repeatedly contacts and separates from the second electrode sheet during the vibration process.

[0006] Preferably, the structure of the self-excited vibration component away from one end of the vertical guide rail is a resonant mass block, and a first electrode sheet is fixedly provided on the bottom and top surfaces of the resonant mass block, and two second electrode sheets are fixedly provided on the sliding support component, and the two second electrode sheets are respectively located directly above and directly below the resonant mass block.

[0007] Preferably, the self-excited vibration component includes a spring vibration plate and the resonant mass block, the spring vibration plate is arranged perpendicular to the vertical guide rail, one end of the spring vibration plate is provided with a first sliding hole, and the other end is fixedly connected to the resonant mass block, and the spring vibration plate is slidably set on the vertical guide rail through the first sliding hole.

[0008] Preferably, the sliding support assembly includes a sliding assembly, an intermediate connecting piece and two contact support plates, the sliding assembly includes an upper sliding sleeve and a lower sliding sleeve, the upper sliding sleeve and the lower sliding sleeve are arranged opposite to each other up and down, one end of the spring vibration plate is clamped between the upper sliding sleeve and the lower sliding sleeve, a coaxial second sliding hole is provided between the upper sliding sleeve and the lower sliding sleeve, the sliding support assembly is slidably connected to the vertical guide rail through the second sliding hole, one end of the intermediate connecting piece is fixedly connected to the sliding assembly, and the other end is fixedly connected to the two contact support plates, the two contact support plates are respectively located on the upper and lower sides of the resonant mass block, and two second electrode sheets are respectively fixedly attached to the two contact support plates on one side facing the resonant mass block.

[0009] Preferably, the resonant mass block is fixed to the spring vibration sheet by bolts.

[0010] Preferably, the vertical guide rail is cylindrical, and the first sliding hole and the vertical guide rail are clearance-matched.

[0011] Preferably, the second sliding hole and the vertical guide rail are clearance-matched.

[0012] Preferably, it also includes a lower base plate, an upper top plate and a connecting plate, the lower base plate and the upper top plate are arranged opposite to each other in the upper and lower directions, the two ends of the connecting plate are respectively fixedly connected to the edges of the same side of the lower base plate and the upper top plate, the vertical guide rail is fixedly arranged between the lower base plate and the upper top plate, and the two ends of the vertical guide rail are respectively fixedly connected to the lower base plate and the upper top plate.

[0013] Preferably, the first electrode sheet and the second electrode sheet are made of nylon and Teflon materials respectively.

[0014] Preferably, the design spacing between the upper contact support plate and the resonant mass block is calculated using the following formula:

[0015] A1=l*sin[θ+(mgb / 2μK1)];

[0016] The design spacing between the contact support plate and the resonant mass block below is calculated using the following formula:

[0017] A2=l*sin[-θ+(mgb / 2μK1)];

[0018] In the formula, l is the length of the spring vibration plate, b is the sum of the thicknesses of the upper sleeve and the lower sleeve, K1 is the stiffness of the spring vibration plate, m is the sum of the masses of the sliding support assembly and the self-excited vibration assembly, μ is the static friction coefficient between the upper sleeve and the lower sleeve and the vertical guide rail, and θ is the maximum angle between the inner walls of the upper sleeve and the lower sleeve and the vertical guide rail.

[0019] Compared with the prior art, the present invention has achieved the following technical effects:

[0020] The present invention provides a self-excited vibration type friction nano energy collector based on gravity induction. When the energy collector is excited by external low-frequency vibration, the sliding support component of the energy collector will slide due to the change of friction between the energy collector and the vertical guide rail. The self-excited vibration component will self-excite under the gravity induction of the device to drive the first electrode sheet to vibrate up and down and repeatedly contact and separate with the second electrode sheet. At this time, the sliding support component and the self-excited vibration component will be in a self-excited resonance state; the first electrode sheet and the second electrode sheet on the self-excited vibration component are made of different friction materials. When the first electrode sheet and the second electrode sheet are in contact and separation, an induced electromotive force will be generated, thereby generating an induced voltage and realizing the conversion from gravity → mechanical energy → electrical energy; the contact support plate arranged in the energy collector hinders the travel of the resonant mass block during the system resonance process to achieve the purpose of amplitude truncation, thereby causing the energy collector to generate instantaneous high-frequency oscillation due to collision, thereby achieving the purpose of reducing the device impedance and increasing the instantaneous output power. Therefore, the solution provided by the present invention achieves the power generation effect of small impedance and large output through amplitude truncation, realizes the up-conversion of low-frequency vibration through gravity-induced self-excited vibration, and realizes the conversion and collection of electric energy through contact-separation friction power generation. It has the advantages of simple manufacturing, light weight, low cost and high conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1A schematic diagram of the structure of the gravity-induced self-excited vibration friction nano energy harvester provided by the present invention;

[0023] Figure 2 It is a schematic structural diagram of the power generation substrate assembly in the present invention;

[0024] Figure 3 It is a structural schematic diagram of the sliding support assembly in the present invention;

[0025] Figure 4 It is a structural schematic diagram of the self-excited vibration component in the present invention;

[0026] Figure 5 This is a simplified schematic diagram of the forces acting on the sliding support assembly and the self-excited vibration assembly during the vibration process.

[0027] In the figure: 1. Gravity-induced self-excited vibration friction nano energy collector; 2. Power generation base assembly; 3. Sliding support assembly; 4. Self-excited vibration assembly; 5. Power generation base; 6. Vertical guide rail; 7. Upper sliding sleeve; 8. Lower sliding sleeve; 9. Intermediate connecting piece; 10. Contact support plate; 11. Second electrode sheet; 12. Spring vibration sheet; 13. First electrode sheet; 14. Resonance mass block. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The purpose of the present invention is to provide a gravity-induced self-excited vibration friction nano energy collector to solve the problems existing in the above-mentioned prior art. It can increase the vibration frequency of the collector by generating self-excited vibrations through gravity induction, and then use the friction nano power generation principle to realize energy conversion, and achieve high energy output by amplitude truncation.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] The present invention provides a gravity-induced self-excited vibration type friction nano energy collector 1, such as Figure 1 to Figure 5As shown, it includes a vertical guide rail 6, a sliding support assembly 3 and a self-excited vibration assembly 4. The self-excited vibration assembly 4 and the sliding support assembly 3 are both slidably arranged on the vertical guide rail 6 along the vertical direction. A first electrode sheet 13 is fixedly arranged on the partial structure of the self-excited vibration assembly 4 that can generate self-excited vibration. A second electrode sheet 11 is fixedly arranged on the sliding support assembly 3. The second electrode sheet 11 is arranged opposite to the first electrode sheet 13. In the process of the self-excited vibration assembly 4 sliding downward from the top of the vertical guide rail 6, the self-excited vibration assembly 4 can generate self-excited vibration and drive the first electrode sheet 13 to vibrate up and down. The first electrode sheet 13 repeatedly contacts and separates from the second electrode sheet 11 during the vibration process.

[0032] When the external low-frequency vibration excites the energy collector, the sliding support component 3 of the energy collector will slide due to the change in friction between it and the vertical guide rail 6, and the self-excited vibration component 4 will self-excite under the induction of gravity, driving the first electrode sheet 13 to vibrate up and down and repeatedly contact and separate from the second electrode sheet 11. At this time, the sliding support component 3 and the self-excited vibration component 4 will be in a self-excited resonance state; the first electrode sheet 13 and the second electrode sheet 11 on the self-excited vibration component 4 are made of different friction materials. When the first electrode sheet 13 and the second electrode sheet 11 are in contact and separation, an induced electromotive force will be generated, thereby generating an induced voltage and realizing the conversion from gravity → mechanical energy → electrical energy; the contact support plate 10 set by the energy collector hinders the travel of the resonant mass block 14 during the system resonance process to achieve the purpose of amplitude truncation, so that the energy collector generates instantaneous high-frequency oscillation due to the collision, thereby achieving the purpose of reducing the device impedance and increasing the instantaneous output power. Therefore, the solution provided by the present invention achieves the power generation effect of small impedance and large output through amplitude truncation, realizes the up-conversion of low-frequency vibration through gravity-induced self-excited vibration, and realizes the conversion and collection of electric energy through contact-separation friction power generation. It has the advantages of simple manufacturing, light weight, low cost and high conversion efficiency.

[0033] In a specific embodiment, the structure of the self-excited vibration component 4 away from the end of the vertical guide rail 6 is a resonant mass block 14, and a first electrode sheet 13 is fixedly provided on the bottom and top surfaces of the resonant mass block 14. Two second electrode sheets 11 are fixedly provided on the sliding support component 3, and the two second electrode sheets 11 are respectively located directly above and directly below the resonant mass block 14. When the resonant mass block 14 drives the first electrode sheet 13 to move downward, it contacts the second electrode sheet 11 below it. When the resonant mass block 14 drives the first electrode sheet 13 to move upward, it contacts the second electrode sheet 11 above it. The solution provided in this embodiment is provided with two first electrode sheets 13 and two second electrode sheets 11, which is equivalent to doubling the energy storage or power generation efficiency.

[0034] In a specific embodiment, the self-excited vibration component 4 includes a spring vibration plate 12 and a resonant mass block 14. The spring vibration plate 12 is arranged perpendicular to the vertical guide rail 6. A first sliding hole is opened at one end of the spring vibration plate 12, and the other end is fixedly connected to the resonant mass block 14. The spring vibration plate 12 is slidably set on the vertical guide rail 6 through the first sliding hole. In another preferred embodiment, the vertical guide rail 6 is cylindrical. In order to improve the effect of self-excited vibration, the first sliding hole and the vertical guide rail 6 are set to be clearance fit.

[0035] In a specific embodiment, the sliding support assembly 3 includes a sliding assembly, an intermediate connecting member 9 and two contact support plates 10. The elasticity of the spring vibration plate 12 is different from that of the intermediate connecting member 9. The sliding assembly includes an upper sliding sleeve 7 and a lower sliding sleeve 8. The upper sliding sleeve 7 and the lower sliding sleeve 8 are arranged relatively up and down. One end of the spring vibration plate 12 is clamped between the upper sliding sleeve 7 and the lower sliding sleeve 8. A coaxial second sliding hole is provided between the upper sliding sleeve 7 and the lower sliding sleeve 8. The sliding support assembly 3 is slidably connected to the vertical guide rail 6 through the second sliding hole. One end of the intermediate connecting member 9 is fixedly connected to the sliding assembly, and the other end is fixedly connected to the two contact support plates 10. The two contact support plates 10 are respectively located on the upper and lower sides of the resonant mass block 14, and the two second electrode sheets 11 are respectively fixedly attached to the two contact support plates 10 on the side facing the resonant mass block 14. The two contact support plates 10 play the role of supporting the second electrode sheets 11 and preventing the resonant mass block 14 from vibrating significantly. In the solution provided in this embodiment, the self-excited vibration component 4 is arranged between the sliding support components 3, and is driven by the sliding support components 3 to slide synchronously on the vertical guide rail 6, so that the two second electrode sheets 11 are always located on the upper and lower sides of the two first electrode sheets 13, thereby achieving contact and separation.

[0036] In a specific embodiment, the resonant mass block 14 is fixed on the spring vibration sheet 12 by bolts, and the resonant mass block 14 is preferably a square structure.

[0037] In a specific embodiment, the second sliding hole and the vertical guide rail 6 are clearance-matched, and the clearance between the second sliding hole and the vertical guide rail 6 is the same as the clearance between the first sliding hole and the vertical guide rail 6 .

[0038] In a specific embodiment, the gravity-induced self-excited vibration friction nano energy collector 1 also includes a lower substrate, an upper top plate and a connecting plate. The lower substrate and the upper top plate are arranged opposite to each other in the upper and lower directions. The two ends of the connecting plate are fixedly connected to the edges of the same side of the lower substrate and the upper top plate, respectively. The vertical guide rail 6 is fixedly arranged between the lower substrate and the upper top plate, and the two ends of the vertical guide rail 6 are fixedly connected to the lower substrate and the upper top plate, respectively. The bottom end of the vertical guide rail 6 is threadedly connected to the lower substrate, and the top end of the vertical guide rail 6 is fixed to the upper top plate by a nut.

[0039] The lower base plate, the upper top plate and the connecting plate together constitute a power generation base 5 , and the power generation base 5 and the vertical guide rail 6 together constitute a power generation base assembly 2 .

[0040] In a specific embodiment, the first electrode sheet 13 and the second electrode sheet 11 are made of nylon and Teflon materials respectively.

[0041] In a specific embodiment, the design spacing between the upper contact support plate 10 and the resonant mass block 14 is calculated using the following formula:

[0042] A1=l*sin[θ+(mgb / 2μK1)]

[0043] The design spacing between the lower contact support plate 10 and the resonant mass block 14 is calculated using the following formula:

[0044] A2=l*sin[-θ+(mgb / 2μK1)]

[0045] In the formula, l is the length of the spring vibration plate 12, b is the sum of the thicknesses of the upper sliding sleeve 7 and the lower sliding sleeve 8, K1 is the stiffness of the spring vibration plate 12, m is the sum of the masses of the sliding support component 3 and the self-excited vibration component 4, μ is the static friction coefficient between the upper sliding sleeve 7 and the lower sliding sleeve 8 and the vertical guide rail 6, and θ is the maximum angle between the upper sliding sleeve 7 and the lower sliding sleeve 8 relative to the vertical guide rail 6.

[0046] The use process of the device provided by the present invention is generally as follows:

[0047] First, the sliding support assembly 3 and the self-excited vibration assembly 4 are manually or in other ways lifted to the top of the vertical guide rail 6, and the device is placed in a vibration environment (for example, the resonant mass block 14 is manually made to vibrate). The device is stimulated by the vibration in the external environment, and the sliding support assembly 3 will begin to slide, driving the self-excited vibration assembly 4 to generate self-excited vibration under the induction of gravity. The device will be in a resonant state, and the sliding support assembly 3 will drive the self-excited vibration assembly 4 to slide downward until it reaches the bottom of the vertical guide rail 6. Through the self-excited vibration of the self-excited vibration assembly 4, the first electrode sheet 13 can simultaneously obtain the high-frequency vibration of the resonant mass block 14. During vibration, the first electrode sheet 13 and the second electrode sheet 11 repeatedly contact and separate, so that an induced electromotive force is generated between the two materials.

[0048] The present invention uses gravity as the energy source for the energy collector to maintain motion, and self-excited vibration is excited by Coulomb friction. The self-excited vibration generated by the spring vibrating plate 12 is more conducive to obtaining a higher vibration frequency. The present invention fixes Teflon on the contact support plate 10 and nylon on the resonant mass block 14 to ensure that the two materials can be contacted and separated at high frequency during the self-excited vibration and generate induced electromotive force. The contact support plate 10 plays the role of cutting off the resonant mass block 14 to increase the instantaneous output power and reduce the impedance of the device. The present invention can be equipped with an energy storage device to collect the generated energy according to the use requirements, and has the advantages of high frequency, high conversion efficiency, simple structure and easy implementation.

[0049] In the solution provided by the present invention, due to the difference in stiffness, a large relative displacement will be generated between the sliding support assembly 3 and the spring vibration sheet 12 during the resonance process, so the resonant mass block 14 and the contact support plate 10 will collide.

[0050] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A gravity-induced self-excited vibration friction nano energy harvester, characterized in that: It includes a vertical guide rail, a sliding support assembly and a self-excited vibration assembly, wherein the self-excited vibration assembly and the sliding support assembly are both slidably arranged on the vertical guide rail along the vertical direction, a first electrode sheet is fixedly arranged on the partial structure of the self-excited vibration assembly that can generate self-excited vibration, a second electrode sheet is fixedly arranged on the sliding support assembly, and the second electrode sheet is arranged opposite to the first electrode sheet, and during the process of the self-excited vibration assembly sliding downward from the top end of the vertical guide rail, the self-excited vibration assembly can generate self-excited vibration and drive the first electrode sheet to vibrate up and down, and the first electrode sheet repeatedly contacts and separates from the second electrode sheet during the vibration process; the structure of the self-excited vibration assembly away from one end of the vertical guide rail is a resonant mass block, and the bottom and top surfaces of the resonant mass block are fixedly provided with a first electrode sheet, and two second electrode sheets are fixedly arranged on the sliding support assembly, and the two second electrode sheets are respectively located directly above and directly below the resonant mass block; the self-excited vibration assembly includes a spring 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt and a nut.

2. The gravity-induced self-excited vibration friction nano energy harvester according to claim 1 is characterized in that: The resonant mass block is fixed on the spring vibration sheet by means of bolts.

3. The gravity-induced self-excited vibration friction nano energy harvester according to claim 1, characterized in that: The vertical guide rail is cylindrical, the first sliding hole and the vertical guide rail are clearance-matched, and the second sliding hole and the vertical guide rail are clearance-matched.

4. The gravity-induced self-excited vibration friction nano energy harvester according to claim 1, characterized in that: It also includes a lower base plate, an upper top plate and a connecting plate, wherein the lower base plate and the upper top plate are arranged opposite to each other in an upper and lower direction, and two ends of the connecting plate are respectively fixedly connected to the edges of the lower base plate and the upper top plate on the same side, and the vertical guide rail is fixedly arranged between the lower base plate and the upper top plate, and two ends of the vertical guide rail are respectively fixedly connected to the lower base plate and the upper top plate.

5. The gravity-induced self-excited vibration friction nano energy harvester according to claim 1, characterized in that: The first electrode sheet and the second electrode sheet are made of nylon and Teflon materials respectively.

6. The gravity-induced self-excited vibration friction nano energy harvester according to claim 1, characterized in that: The design spacing between the upper contact support plate and the resonant mass block is calculated using the following formula: The design spacing between the contact support plate and the resonant mass block below is calculated using the following formula: ； In the formula, l is the length of the spring vibrating sheet, b is the sum of the thicknesses of the upper sliding sleeve and the lower sliding sleeve, K 1 is the stiffness of the spring vibrating plate, m is the sum of the masses of the sliding support assembly and the self-excited vibration assembly, μ is the static friction coefficient between the upper sliding sleeve, the lower sliding sleeve and the vertical guide rail, θ It is the maximum angle between the inner walls of the upper sliding sleeve and the lower sliding sleeve and the vertical guide rail.

Images