A nonlinear energy well vibration reduction and energy capture device and method

Abstract

The present invention discloses a nonlinear energy trap vibration reduction and energy capture device and method, which relates to the field of vibration control and energy collection technology. The device includes a vibration conversion component, a collision energy capture component and an energy collection unit. The vibration conversion component includes a substrate, a vertical plate and a cantilever beam, and one end of the cantilever beam is connected to the vertical plate; the collision energy capture component includes a frame, a horizontal vibration module and a vertical vibration module, and the vertical vibration module includes a first vertical vibration unit and a second vertical vibration unit. The horizontal vibration module is arranged between the first vertical vibration unit and the second vertical vibration unit; the horizontal vibration module is driven by vibration and moves in the opposite direction after elastic collision and rigid collision with the vertical vibration module; the energy collection unit is used to collect and store the charge energy on the cantilever beam, the first vertical vibration unit and the second vertical vibration unit. While broadening the working frequency band, the method collects vibration energy from different directions to improve the efficiency of vibration reduction and energy capture.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration control and energy harvesting, and in particular to a nonlinear energy well vibration reduction and energy harvesting device and method. Background Art

[0002] Nonlinear energy sink is a passive control technology that can achieve targeted energy transfer. The nonlinear energy sink device mainly obtains nonlinear restoring force through springs, magnets, buckling beams, rotation, linear stiffness superposition, etc., which can quickly transfer the vibration energy of the main structure to the vibrator through nonlinear stiffness. The vibrator then dissipates the energy through damping, and the vibration energy does not return to the main structure, thereby achieving vibration reduction of the main structure. Nonlinear energy sink passive energy dissipation devices have been widely used and promoted in various practical engineering vibration reduction fields due to their advantages such as light weight, strong robustness, and wide vibration reduction bandwidth.

[0003] Among the existing technologies, nonlinear energy sinks with non-smooth characteristics such as collision and variable stiffness have better vibration reduction and stability performance than nonlinear energy sinks with smooth characteristics. However, due to the limitations of existing design, experimental and analysis methods, the development and application of non-smooth nonlinear energy sink technology in most specific engineering scenarios (such as marine drilling) are greatly limited.

[0004] In addition, the use of related batteries as a power supply method faces problems such as short life, difficult maintenance, and environmental pollution. The use of vibration energy harvesting technology to convert vibration mechanical energy into electrical energy and store it can replace or extend the traditional battery power supply method of low-power electronic devices (such as equipment operation monitoring sensors, etc.). It has the advantages of self-power supply and green environmental protection, and is receiving more and more attention.

[0005] The Chinese invention patent with publication number CN110071661B discloses a low-frequency and wide-band multi-modal array energy collection device, which includes a base and four piezoelectric energy recovery modules. There are four piezoelectric energy recovery modules, and each piezoelectric energy recovery module is horizontally fixed on the base through a mounting hole on the base; the piezoelectric energy recovery module includes a first L-shaped piezoelectric cantilever beam, a second L-shaped piezoelectric cantilever beam, a mass block, a piezoelectric material and an adaptive frequency modulation module. The frequency modulation base is perpendicular to the two side surfaces of the end surface near the base end and is provided with a middle plug interface and an end plug interface. The middle plug interface is arranged in the middle of the side surface of the frequency modulation base, and the end plug interface is arranged on the side of the frequency modulation base away from the end near the base. The end plug interface is used to plug in the first L-shaped piezoelectric cantilever beam, and the middle plug interface is used to plug in the second L-shaped piezoelectric cantilever beam; the device has low-frequency vibration collection capabilities and wide-band vibration collection capabilities, and has large energy output power and small size.

[0006] However, the structure of the above-mentioned piezoelectric energy recovery device is not compact enough, the energy output still needs to be improved, and the working efficiency of the device needs to be further improved.

[0007] Therefore, how to efficiently and stably collect various forms of energy from the environment to replace traditional batteries is an urgent problem to be solved. Summary of the invention

[0008] In view of the technical problems that the existing electric energy recovery device is not compact enough in structure, the energy output needs to be improved, and the working efficiency of the device needs to be further improved, the purpose of the present invention is to provide a nonlinear energy sink vibration reduction and energy capture device and method, so as to collect and convert vibration energy from different directions while widening the working frequency band, thereby significantly improving the efficiency of vibration reduction and energy capture.

[0009] In order to solve the above problems, the first object of the present invention is to provide a nonlinear energy well vibration reduction and energy harvesting device, the nonlinear energy well vibration reduction and energy harvesting device comprising:

[0010] A vibration conversion assembly, comprising a base plate connected to a vibrating part of the engineering equipment, a vertical plate vertically connected to one end of the base plate, and a cantilever beam horizontally arranged above the base plate, one end of the cantilever beam being connected to the vertical plate;

[0011] The collision energy capture assembly comprises a frame, a horizontal vibration module horizontally connected to the inside of the frame, and a vertical vibration module vertically connected to the inside of the frame, wherein the horizontal vibration module is connected to the other end of the cantilever beam, wherein:

[0012] The vertical vibration module includes a first vertical vibration unit connected to the top of the frame and a second vertical vibration unit connected to the bottom of the frame, and the horizontal vibration module is arranged between the first vertical vibration unit and the second vertical vibration unit;

[0013] The vibration of the engineering equipment is transmitted to the horizontal vibration module via the cantilever beam and the frame, and the horizontal vibration module is driven by the vibration to sequentially undergo elastic collision and rigid collision with one of the first vertical vibration unit and the second vertical vibration unit and then move in the opposite direction;

[0014] An energy collection unit is used to collect and store the charge energy on the cantilever beam, the first vertical vibration unit and the second vertical vibration unit.

[0015] Preferably, the horizontal vibration module comprises a spherical mass block and a horizontal preload spring connected to two sides of the spherical mass block, and one end of the horizontal preload spring away from the spherical mass block is fixedly connected to the frame.

[0016] Preferably, the first vertical vibration unit includes a first vertical spring whose top end is connected to the frame, a first cylindrical tube mounted on the first vertical spring, a first collision plate horizontally connected to the bottom end of the first vertical spring, a first stacked piezoelectric ceramic arranged on the surface of one side of the first collision plate close to the horizontal vibration module, and a second stacked piezoelectric ceramic arranged on the end surface of one side of the first cylindrical tube close to the horizontal vibration module, and the top end of the first cylindrical tube is fixedly connected to the frame.

[0017] Preferably, the second vertical vibration unit includes a second vertical spring whose bottom end is connected to the frame, a second cylindrical tube mounted on the second vertical spring, a second collision plate horizontally connected to the top of the second vertical spring, a third stacked piezoelectric ceramic arranged on the surface of the second collision plate on one side close to the horizontal vibration module, and a fourth stacked piezoelectric ceramic arranged on the end surface of the second cylindrical tube on one side close to the horizontal vibration module, and the bottom end of the second cylindrical tube is fixedly connected to the frame.

[0018] Preferably, the energy collection unit includes a piezoelectric composite material and an energy storage circuit arranged on the surface of the cantilever beam, and the energy storage circuit is respectively connected to the piezoelectric composite material, the first stacked piezoelectric ceramic, the second stacked piezoelectric ceramic, the third stacked piezoelectric ceramic and the fourth stacked piezoelectric ceramic through wires.

[0019] Preferably, the spherical mass block is suitable for moving in the vertical direction driven by the cantilever beam and elastically colliding with the first collision plate, and the first collision plate is suitable for squeezing the first vertical spring to continue to compress and rigidly collide with the first cylindrical tube.

[0020] Preferably, the spherical mass block is suitable for moving in the vertical direction driven by the cantilever beam and elastically colliding with the second collision plate, and the second collision plate is suitable for squeezing the second vertical spring to compress and rigidly collide with the second cylindrical tube.

[0021] Preferably, the first stacked piezoelectric ceramic, the second stacked piezoelectric ceramic, the third stacked piezoelectric ceramic and the fourth stacked piezoelectric ceramic accumulate electric charges after being impacted, squeezed and deformed by the spherical mass block.

[0022] Preferably, the base plate and the lower end surface of the frame are fixedly connected to the vibration parts of the engineering equipment respectively by a plurality of screws.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The nonlinear energy sink vibration reduction and energy capture device in the present application is composed of a vibration conversion component, a collision energy capture component and an energy collection unit, wherein the vibration conversion component is used to convert the vibration energy of the engineering equipment into mechanical energy, and the vibration conversion component is composed of a substrate, a vertical plate and a cantilever beam, the substrate is connected to the vibration part of the engineering equipment, the vertical plate is vertically connected to one end of the substrate, the cantilever beam is horizontally arranged above the substrate, and one end of the cantilever beam is connected to the vertical plate, so that the substrate is fixed on the vibration source, the vertical plate and the cantilever beam constitute a lever system, and the horizontal vibration of the cantilever beam transfers the vibration energy to the collision energy capture component; the collision energy capture component is used to receive the vibration energy from the cantilever beam and collide with the vertical vibration module, and the collision energy capture component is composed of a frame, a horizontal vibration module and a vertical vibration module, wherein the frame is used to provide installation support for the horizontal vibration module and the vertical vibration module, wherein the horizontal vibration module is horizontally connected to the inside of the frame, the vertical vibration module is vertically connected to the frame, and the horizontal vibration module is connected to the other end of the cantilever beam. The vertical vibration module is composed of a first vertical vibration unit and a second vertical vibration unit, the first vertical vibration unit is connected to the inner top of the frame, the second vertical vibration unit is connected to the inner bottom of the frame, and the horizontal vibration module is arranged between the first vertical vibration unit and the second vertical vibration unit. In this way, the vibration of the engineering equipment is transmitted to the horizontal vibration module through the cantilever beam and the frame, and the horizontal vibration module is driven by the vibration to have an elastic collision and a rigid collision with one of the first vertical vibration unit and the second vertical vibration unit in turn, and then moves in the opposite direction. The energy collection unit is used to collect and store the charge energy on the cantilever beam, the first vertical vibration unit and the second vertical vibration unit.

[0025] 2. The vibration of the engineering equipment is first transmitted to the cantilever beam through the substrate. The cantilever beam converts these vibrations into vibrations of the horizontal vibration module. The horizontal vibration module undergoes elastic and rigid collisions with the first vertical vibration unit and the second vertical vibration unit during the vertical vibration process. Since this collision process is nonlinear, the response of the collision depends not only on the intensity of the collision, but may also be affected by factors such as the collision sequence and speed. During the collision process, mechanical energy is converted into electrical energy. This conversion is mainly based on the piezoelectric effect of the piezoelectric ceramics on the first vertical vibration unit and the second vertical vibration unit, that is, the piezoelectric ceramics generate electric charges when subjected to mechanical stress. The energy collection unit is responsible for collecting and storing the charge energy generated by the vibration conversion and collision process. The vibration reduction and energy capture device can not only reduce the vibration of the engineering equipment by converting the vibration energy into electrical energy, but also improve the stability and life of the equipment. On the other hand, the device can convert the vibration energy that was originally wasted into usable electrical energy to achieve energy recycling.

[0026] 3. The geometric nonlinear design of the connection between a pair of horizontal preload springs, the spherical mass block and the frame provides a nonlinear factor for the nonlinear energy sink, which determines the compact reliability of the device, relatively improves the design space utilization, and broadens its operating frequency band as a whole. In addition, the design of the nonlinear energy sink makes the device more adaptable to vibrations of different intensities and frequencies. Under different vibration conditions, it can collect vibration energy in different directions, improving the efficiency of energy conversion.

[0027] 4. Through the introduction and combination of elastic and rigid collision, the stiffness of the device changes in sections, broadening the working frequency band of vibration reduction and energy capture.

[0028] 5. This device attaches stacked piezoelectric ceramics to the energy collection unit of the elastic and rigid collision surfaces, attaches piezoelectric composite materials to the energy collection unit of the cantilever beam, and adds corresponding multiple external energy storage circuits, which can realize the coordinated conversion of power supply by multiple energy collection units and effectively improve the working efficiency of the device.

[0029] 6. This device has good robustness. It can capture energy in a wide frequency range, and at the same time, it can reduce harmful vibrations and protect the main equipment through passive control of non-smooth nonlinear energy wells. It can meet more engineering application scenarios and significantly improve the efficiency of vibration reduction and energy capture to achieve the goal of integrated vibration reduction and energy capture. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of a nonlinear energy well vibration reduction and energy harvesting device according to an embodiment of the present invention;

[0031] Figure 2 It is a schematic diagram of the main structure of the collision energy capture component in an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1-vibration conversion assembly; 11-base plate; 111-screw; 12-vertical plate; 13-cantilever beam;

[0034] 2- Collision energy capture component;

[0035] 21-frame;

[0036] 22- horizontal vibration module; 221- spherical mass block; 222- horizontal preload spring;

[0037] 23- vertical vibration module;

[0038] 231-first vertical vibration unit; 2311-first vertical spring; 2312-first cylindrical tube; 2313-first collision plate; 2314-first stacked piezoelectric ceramic; 2315-second stacked piezoelectric ceramic;

[0039] 232 - second vertical vibration unit; 2321 - second vertical spring; 2322 - second cylindrical tube; 2323 - second collision plate; 2324 - third stacked piezoelectric ceramic; 2325 - second stacked piezoelectric ceramic;

[0040] 3-energy collection unit; 31-piezoelectric composite material; 32-conducting wire; 33-energy storage circuit. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] In the existing technology, the vibration problem of equipment has become increasingly prominent due to the increase in tonnage, power of the main engine and lightening of the main structure of various large-scale engineering equipment. Vibration exceeding a certain limit will inevitably cause great damage to the human body, the equipment itself and the precision monitoring and sensing instruments on it.

[0045] Vibration control technology mainly includes passive control and active control, which reduces the vibration energy transmitted from the vibration source to the main body through vibration reduction, vibration absorption, vibration isolation, etc. Active control will cause problems such as high cost and high energy consumption, while passive control has the advantages of simple structure, easy maintenance and good economy because it only reduces structural vibration by adding energy-consuming devices and does not require external energy input.

[0046] Nonlinear energy wells with non-smooth characteristics such as collision and variable stiffness have better vibration reduction and stability performance than smooth nonlinear energy wells. Therefore, nonlinear energy wells are widely used and promoted in various practical engineering vibration reduction fields.

[0047] However, due to the limitations of existing design, experimental and analytical methods, the development and application of non-smooth nonlinear energy sink technology in most specific engineering scenarios (such as ocean drilling) are greatly limited.

[0048] To solve the above technical problems, please refer to Figure 1-2 As shown, an embodiment of the present invention provides a nonlinear energy well vibration reduction and energy harvesting device, the nonlinear energy well vibration reduction and energy harvesting device comprises a vibration conversion component 1, a collision energy harvesting component 2 and an energy collection unit 3, wherein:

[0049] The vibration conversion assembly 1 is used to convert the vibration energy of the engineering equipment into mechanical energy. In this embodiment, the vibration conversion assembly 1 includes a base plate 11, a vertical plate 12 and a cantilever beam 13. The base plate 11 is connected to the vibration part of the engineering equipment, the vertical plate 12 is vertically connected to one end of the base plate 11, and the cantilever beam 13 is horizontally arranged above the base plate 11, and one end of the cantilever beam 13 is connected to the vertical plate 12. In this way, the base plate 11 is fixed on the vibration source, the vertical plate 12 and the cantilever beam 13 form a lever system, and the horizontal vibration of the cantilever beam 13 transfers the vibration energy to the collision energy capture assembly 2.

[0050] The collision energy capture component 2 is used to receive vibration energy from the cantilever beam 13 and collide with the vertical vibration module 23. In this embodiment, the collision energy capture component 2 includes a frame 21, a horizontal vibration module 22 and a vertical vibration module 23, wherein the frame 21 is used to provide installation support for the horizontal vibration module 22 and the vertical vibration module 23, wherein the horizontal vibration module 22 is horizontally connected to the inside of the frame 21, and the vertical vibration module 23 is vertically connected to the frame 21, and the horizontal vibration module 22 is connected to the other end of the cantilever beam 13.

[0051] Preferably, the vertical vibration module 23 includes a first vertical vibration unit 231 and a second vertical vibration unit 232, the first vertical vibration unit 231 is connected to the inner top of the frame 21, the second vertical vibration unit 232 is connected to the inner bottom of the frame 21, and the horizontal vibration module 22 is arranged between the first vertical vibration unit 231 and the second vertical vibration unit 232.

[0052] The vibration of the engineering equipment is transmitted to the horizontal vibration module 22 through the cantilever beam 13 and the frame 21. The horizontal vibration module 22 is driven by the vibration to elastically collide with one of the first vertical vibration unit 231 and the second vertical vibration unit 232 in sequence and then move in the opposite direction.

[0053] The energy collection unit 3 is used to collect and store the charge energy on the cantilever beam 13 , the first vertical vibration unit 231 and the second vertical vibration unit 232 .

[0054] Specifically in this embodiment, the vibration of the engineering equipment is first transmitted to the cantilever beam 13 through the substrate 11, and the cantilever beam 13 converts these vibrations into vibrations of the horizontal vibration module 22. The horizontal vibration module 22 undergoes elastic and rigid collisions with the first vertical vibration unit 231 and the second vertical vibration unit 232 during the vertical vibration process. Since this collision process is nonlinear, it means that the collision response not only depends on the intensity of the collision, but may also be affected by factors such as the collision sequence and speed.

[0055] During the collision process, mechanical energy is converted into electrical energy. This conversion is mainly achieved based on the piezoelectric effect of the piezoelectric ceramics on the first vertical vibration unit 231 and the second vertical vibration unit 232, that is, the piezoelectric ceramics generate electric charges when subjected to mechanical stress. The energy collection unit 3 is responsible for collecting and storing the charge energy generated by the vibration conversion and collision process.

[0056] Therefore, the vibration reduction and energy capture device can not only reduce the vibration of engineering equipment and improve the stability and life of the equipment by converting vibration energy into electrical energy, but also can convert the originally wasted vibration energy into usable electrical energy to achieve energy recycling.

[0057] In addition, it is worth noting that the design of the nonlinear energy well makes the device more adaptable to vibrations of different intensities and frequencies. Under different vibration conditions, vibration energy in different directions can be collected, thereby improving the efficiency of energy conversion.

[0058] For further information, see Figure 1 , 2 As shown, the horizontal vibration module 22 includes a spherical mass block 221 and a horizontal preload spring 222 . The two horizontal preload springs 222 are respectively connected to the two sides of the spherical mass block 221 , and one end of the horizontal preload spring 222 away from the spherical mass block 221 is fixedly connected to the frame 21 .

[0059] Specifically, the spherical mass block 221 is the core component of the horizontal vibration module 22, and it responds to the vibration transmitted by the cantilever beam 13 through its mass. When the cantilever beam 13 is vibrated by the engineering equipment, these vibrations are transmitted to the horizontal vibration module 22, and the horizontal preload spring 222 provides the necessary elastic force for the spherical mass block 221, so that it can vibrate freely inside the frame 21. The preload and stiffness of the flat preload spring 222 determine the frequency and amplitude of the vibration of the spherical mass block 221. The vibration of the spherical mass block 221 in the vertical direction. Due to the intensity and speed of its collision, the spherical mass block 221 begins to vibrate in the vertical direction, which will cause it to collide with the first vertical vibration unit 231 and the second vertical vibration unit 232. These collisions form elastic collisions and rigid collisions according to the collision intensity and speed. During the collision, the kinetic energy of the spherical mass block 221 is converted into electrical energy and realized through piezoelectric materials or electromagnetic induction.

[0060] For further information, see Figure 1 , 2 As shown, the first vertical vibration unit 231 includes a first vertical spring 2311, a first cylindrical tube 2312, a first collision plate 2313, a first stacked piezoelectric ceramic 2314 and a second stacked piezoelectric ceramic 2315. The top end of the first vertical spring 2311 is connected to the frame 21, the first cylindrical tube 2312 is sleeved on the first vertical spring 2311, the first collision plate 2313 is horizontally connected to the bottom end of the first vertical spring 2311, the first stacked piezoelectric ceramic 2314 is arranged on a side surface of the first collision plate 2313 close to the horizontal vibration module 22, the top end of the first cylindrical tube 2312 is fixedly connected to the frame 21, and the second stacked piezoelectric ceramic 2315 is arranged at the bottom end of the first cylindrical tube 2312.

[0061] Specifically in this embodiment, the first vertical spring 2311 provides elastic force in the vertical direction, and the spherical mass block 221 and the first collision plate 2313 collide elastically in the vertical direction, and the first stacked piezoelectric ceramic 2314 on the surface of the first collision plate 2313 is squeezed and deformed, and then accumulates charge due to the piezoelectric effect. The first collision plate 2313 continues to move and then collides rigidly with the first cylindrical tube 2312, and the second stacked piezoelectric ceramic 2315 on the surface of the first cylindrical tube 2312 is squeezed and deformed, and then can also accumulate charge due to the piezoelectric effect, so that the mechanical energy generated by the upward movement collision can be converted into electrical energy.

[0062] For further information, see Figure 1 , 2As shown, the second vertical vibration unit 232 includes a second vertical spring 2321, a second cylindrical tube 2322, a second collision plate 2323, a third stacked piezoelectric ceramic 2324 and a fourth stacked piezoelectric ceramic 2325. The bottom end of the second vertical spring 2321 is connected to the frame 21, the second cylindrical tube 2322 is sleeved on the second vertical spring 2321, the second collision plate 2323 is horizontally connected to the top of the second vertical spring 2321, the third stacked piezoelectric ceramic 2324 is arranged on a side surface of the second collision plate 2323 close to the horizontal vibration module 22, the bottom end of the second cylindrical tube 2322 is fixedly connected to the frame 21, and the fourth stacked piezoelectric ceramic 2325 is arranged on the top of the second cylindrical tube 2322.

[0063] Similarly, the second vertical vibration unit 232 is arranged on the other side of the horizontal vibration module 22. When the spherical mass block 221 starts to move away from the first vertical vibration unit 231, the spherical mass block 221 and the second collision plate 2323 have an elastic collision. The third stacked piezoelectric ceramic 2324 on the upper surface of the second collision plate 2323 is squeezed and deformed, and then accumulates charge due to the piezoelectric effect; the second collision plate 2323 continues to move downward and then has a rigid collision with the second cylindrical tube 2322. The fourth stacked piezoelectric ceramic 2325 on the surface of the second cylindrical tube 2322 is squeezed and deformed, and then can also accumulate charge due to the piezoelectric effect. In this way, the mechanical energy generated by the downward movement collision can also be converted into electrical energy.

[0064] For further information, see Figure 1 , 2 As shown, the energy collection unit 3 includes a piezoelectric composite material 31 and an energy storage circuit 33, wherein the piezoelectric composite material 31 is arranged on the surface of the cantilever beam 13, and the energy storage circuit 33 is connected to the piezoelectric composite material 31, the first stacked piezoelectric ceramic 2314, the second stacked piezoelectric ceramic 2315, the third stacked piezoelectric ceramic 2324 and the fourth stacked piezoelectric ceramic 2325 through the wire 32.

[0065] In this embodiment, since the piezoelectric composite material 31 is disposed on the surface of the cantilever beam 13 , the piezoelectric effect can be used to convert mechanical energy into electrical energy.

[0066] Preferably, the piezoelectric composite material may be composed of an inorganic piezoelectric material (such as piezoelectric ceramics) and a polymer matrix, which structure can improve the flexibility and adaptability of the material while maintaining the piezoelectric properties.

[0067] The energy storage circuit 33 is connected to the piezoelectric composite material 31, the first stacked piezoelectric ceramic 2314, the second stacked piezoelectric ceramic 2315, the third stacked piezoelectric ceramic 2324 and the fourth stacked piezoelectric ceramic 2325 through the wire 32, and utilizes the characteristics of energy storage elements (such as capacitors or batteries) to store energy after charging with power input and release it when needed.

[0068] It should be noted that the combined use of piezoelectric composite materials and stacked piezoelectric ceramics can not only improve the efficiency of energy conversion, but also make the conversion from mechanical vibration to electrical energy more efficient.

[0069] For further information, see Figure 2 As shown, the spherical mass block 221 is suitable for moving in the vertical direction driven by the cantilever beam 13 and elastically colliding with the first collision plate 2313. The first collision plate 2313 is suitable for squeezing the first vertical spring 2311 to continue to compress and rigidly collide with the first cylindrical tube 2312.

[0070] Therefore, the vibration of the cantilever beam 13 in this embodiment causes the spherical mass block 221 to move in the vertical direction and to elastically collide with the first collision plate 2313. This collision causes the first collision plate 2313 to gain kinetic energy, thereby squeezing the first vertical spring 2311. The first vertical spring 2311 is compressed and accumulates potential energy. When the spring is compressed to contact with the first cylindrical barrel 2312, this potential energy is suddenly released, causing the first collision plate 2313 to rigidly collide with the first cylindrical barrel 2312.

[0071] For further information, see Figure 2 As shown, the spherical mass block 221 is suitable for moving in the vertical direction driven by the cantilever beam 13 and elastically colliding with the second collision plate 2323 . The second collision plate 2323 is suitable for squeezing the second vertical spring 2321 to compress and rigidly collide with the second cylindrical tube 2322 .

[0072] Therefore, the device can adapt to different vibration conditions, thereby improving the environmental adaptability and practicality of the device.

[0073] For further information, see Figure 1 , 2 As shown, the first stacked piezoelectric ceramic 2314 , the second stacked piezoelectric ceramic 2315 , the third stacked piezoelectric ceramic 2324 and the fourth stacked piezoelectric ceramic 2325 accumulate electric charges after being impacted, squeezed and deformed by the spherical mass block 221 .

[0074] It is necessary to further explain that the basic working principle of stacked piezoelectric ceramics is based on the piezoelectric effect, that is, in a specific material (such as piezoelectric ceramics), when mechanical stress is applied, charge distribution and potential difference will be generated, causing the accumulation of charge between electrodes. This effect stores the charge through the energy storage circuit.

[0075] In addition, the stacked piezoelectric ceramic is composed of multiple piezoelectric ceramic layers, each layer having an electrode. When external pressure acts on the spherical mass block 221 and is transmitted to the piezoelectric ceramic, the internal polarization charge is rearranged due to the deformation of the piezoelectric material, resulting in charge accumulation.

[0076] For further information, see Figure 1 As shown, the lower end surfaces of the base plate 11 and the frame 21 are fixedly connected to the vibrating parts of the engineering equipment through a plurality of screws 111 .

[0077] Thus, the base plate 11 and the frame 21 are fixedly connected to the vibrating parts of the engineering equipment by screws 111, ensuring that the vibration conversion component 1 and the collision energy capture component 2 can stably transmit and convert vibration energy. This fixing method can reduce the energy loss caused by vibration and improve the energy conversion efficiency.

[0078] The embodiment of the present invention further provides a vibration reduction and energy harvesting method of a nonlinear energy sink vibration reduction and energy harvesting device, the vibration reduction and energy harvesting method comprising the steps of:

[0079] Step 1: After the cantilever beam 13 and the collision energy capture assembly 2 are connected to the vibrating part of the engineering equipment through the base plate 11, the spherical mass block 221 connected to the cantilever beam 13 is driven to have an initial velocity and moves in the vertical direction under the action of the horizontal preload spring 7;

[0080] Step 2: During the movement, when the horizontal preload spring 7 returns to its original length, the spherical mass block 221 and the first vertical vibration unit 231 or the second vertical vibration unit 232 undergo elastic collision and rigid collision in sequence and then move in the opposite direction;

[0081] Step 3: The first vertical vibration unit 231, the second vertical vibration unit 232 and the cantilever beam 13 are deformed after being subjected to external pressure, thereby continuously accumulating electric charges;

[0082] Step 4: The energy collection unit 3 collects and stores the charge energy on the cantilever beam 13 , the first vertical vibration unit 231 and the second vertical vibration unit 232 .

[0083] Therefore, nonlinear energy trap technology can not only effectively reduce the vibration of engineering equipment and improve the stability and life of the equipment, but also realize energy recovery and reuse by converting vibration energy into electrical energy, thus avoiding energy waste. The key steps of combining elastic collision with rigid collision, charge accumulation and energy collection can effectively suppress the vibration of engineering equipment and efficiently capture energy.

[0084] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A nonlinear energy trap vibration reduction and energy harvesting device, characterized in that: include: A vibration conversion assembly, comprising a base plate connected to a vibrating part of the engineering equipment, a vertical plate vertically connected to one end of the base plate, and a cantilever beam horizontally arranged above the base plate, one end of the cantilever beam being connected to the vertical plate; The collision energy capture assembly comprises a frame, a horizontal vibration module horizontally connected to the inside of the frame, and a vertical vibration module vertically connected to the inside of the frame, wherein the horizontal vibration module is connected to the other end of the cantilever beam, wherein: The vertical vibration module includes a first vertical vibration unit connected to the top of the frame and a second vertical vibration unit connected to the bottom of the frame, and the horizontal vibration module is arranged between the first vertical vibration unit and the second vertical vibration unit; The vibration of the engineering equipment is transmitted to the horizontal vibration module via the cantilever beam and the frame, and the horizontal vibration module is driven by the vibration to sequentially undergo elastic collision and rigid collision with one of the first vertical vibration unit and the second vertical vibration unit and then move in the opposite direction; An energy collection unit is used to collect and store the charge energy on the cantilever beam, the first vertical vibration unit and the second vertical vibration unit.

2. The nonlinear energy trap vibration reduction and energy harvesting device according to claim 1, characterized in that: The horizontal vibration module comprises a spherical mass block and a horizontal preload spring connected to two sides of the spherical mass block, and one end of the horizontal preload spring away from the spherical mass block is fixedly connected to the frame.

3. The nonlinear energy trap vibration reduction and energy harvesting device according to claim 2, characterized in that: The first vertical vibration unit includes a first vertical spring whose top end is connected to the frame, a first cylindrical tube mounted on the first vertical spring, a first collision plate horizontally connected to the bottom end of the first vertical spring, a first stacked piezoelectric ceramic arranged on the surface of one side of the first collision plate close to the horizontal vibration module, and a second stacked piezoelectric ceramic arranged on the end surface of one side of the first cylindrical tube close to the horizontal vibration module, and the top end of the first cylindrical tube is fixedly connected to the frame.

4. The nonlinear energy trap vibration reduction and energy harvesting device according to claim 3, characterized in that: The second vertical vibration unit includes a second vertical spring whose bottom end is connected to the frame, a second cylindrical tube mounted on the second vertical spring, a second collision plate horizontally connected to the top of the second vertical spring, a third stacked piezoelectric ceramic arranged on the surface of the second collision plate on one side close to the horizontal vibration module, and a fourth stacked piezoelectric ceramic arranged on the end surface of the second cylindrical tube on one side close to the horizontal vibration module, and the bottom end of the second cylindrical tube is fixedly connected to the frame.

5. The nonlinear energy sink vibration reduction and energy harvesting device according to claim 4, characterized in that: The energy collection unit includes a piezoelectric composite material and an energy storage circuit arranged on the surface of the cantilever beam, and the energy storage circuit is connected to the piezoelectric composite material, the first stacked piezoelectric ceramic, the second stacked piezoelectric ceramic, the third stacked piezoelectric ceramic and the fourth stacked piezoelectric ceramic through wires.

6. The nonlinear energy well vibration reduction and energy harvesting device according to claim 3, characterized in that: The spherical mass block is suitable for moving in a vertical direction driven by the cantilever beam and elastically colliding with the first collision plate. The first collision plate is suitable for squeezing the first vertical spring to continue to compress and rigidly collide with the first cylindrical tube.

7. The nonlinear energy trap vibration reduction and energy harvesting device according to claim 4, characterized in that: The spherical mass block is suitable for moving in the vertical direction driven by the cantilever beam and elastically colliding with the second collision plate, and the second collision plate is suitable for squeezing the second vertical spring to compress and rigidly collide with the second cylindrical tube.

8. The nonlinear energy sink vibration reduction and energy harvesting device according to claim 5, characterized in that: The first stacked piezoelectric ceramic, the second stacked piezoelectric ceramic, the third stacked piezoelectric ceramic and the fourth stacked piezoelectric ceramic accumulate electric charges after being impacted, squeezed and deformed by the spherical mass block.

9. The nonlinear energy sink vibration reduction and energy harvesting device according to claim 1, characterized in that: The base plate and the lower end surface of the frame are respectively fixedly connected to the vibration parts of the engineering equipment through a plurality of screws.

10. The vibration reduction and energy harvesting method of the nonlinear energy sink vibration reduction and energy harvesting device according to any one of claims 1 to 9, characterized in that: The vibration reduction and energy capture method comprises the steps of: Step 1: After the cantilever beam and the collision energy capture assembly are connected to the vibrating part of the engineering equipment through the base plate, the spherical mass block connected to the cantilever beam is driven to have an initial velocity and moves in the vertical direction under the action of the horizontal preload spring; Step 2: During the movement, when the horizontal preload spring returns to its original length, the spherical mass block and the first vertical vibration unit or the second vertical vibration unit undergo elastic collision and rigid collision in sequence and then move in the opposite direction; Step 3: The first vertical vibration unit, the second vertical vibration unit and the cantilever beam are deformed after being subjected to external pressure, thereby continuously accumulating electric charge; Step 4: Collect and store the charge energy on the cantilever beam, the first vertical vibration unit and the second vertical vibration unit through the energy collection unit.

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