A multi-dimensional ultra-low frequency energy collection and vibration suppression integrated device

Abstract

This invention discloses a multi-dimensional ultra-low frequency energy harvesting and vibration suppression integrated device, relating to the field of low-frequency energy capture, vibration reduction, and isolation technology. The key technical features are: a platform base plate and a supporting platform; three vibration-damping connection mechanisms are provided between the platform base plate and the supporting platform, with the included angles between the three mechanisms being the same; each vibration-damping connection mechanism includes two motor mounting seats, two quasi-zero stiffness devices, and two connecting rods; the two motor mounting seats are fixedly connected to the platform base plate, with opposite installation directions; the tops of the two quasi-zero stiffness devices are respectively connected to the ends of the two connecting rods; and both connecting rods are movably connected to the side walls of the supporting platform. This device not only fully utilizes quasi-zero stiffness technology to achieve excellent vibration isolation and energy capture effects in the low and ultra-low frequency bands, but also allows the external excitation experienced by the object to be multi-directional.

Description

Technical Field

[0001] This invention relates to the field of low-frequency energy harvesting, vibration reduction and isolation technology, and more specifically, to a multi-dimensional ultra-low frequency energy harvesting and vibration suppression integrated device. Background Technology

[0002] Vibration is a very common phenomenon, and therefore contains a huge amount of energy. Scientists are increasingly interested in capturing vibrational energy, and there has been a great deal of research on capturing high-frequency and even ultra-high-frequency vibrational energy. However, in many practical applications, most vibrations are low-frequency or even ultra-low-frequency, such as human movement and ocean waves. If this energy could be harvested to power electronic components such as sensors, it would be very beneficial. Low-frequency / ultra-low-frequency vibrational energy capture has become a cutting-edge and hot topic. In recent years, quasi-zero stiffness devices have received much attention in the field of low-frequency vibration reduction and isolation. Due to their high static and low dynamic stiffness characteristics, quasi-zero stiffness devices can effectively isolate low-frequency vibrations. Attention has also been paid to their application in low-frequency / ultra-low-frequency energy capture. Research on the capture of low-frequency vibrational energy by such devices has verified their feasibility, but most of them are aimed at vertical or single-direction applications, which are not practical.

[0003] Based on the above problems, the applicant provides an integrated device for multi-dimensional ultra-low frequency energy harvesting and vibration suppression. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-dimensional ultra-low frequency energy harvesting and vibration suppression integrated device, which solves the technical problems mentioned in the background art.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a multi-dimensional ultra-low frequency energy harvesting and vibration suppression integrated device, comprising a platform base plate and a bearing platform, wherein three vibration damping connection mechanisms are provided between the platform base plate and the bearing platform, and the included angles between the three vibration damping connection mechanisms are the same; the vibration damping connection mechanism includes two motor mounting seats, two quasi-zero stiffness devices and two connecting rods; the two motor mounting seats are fixedly connected to the platform base plate, and the two motor mounting seats are installed in opposite directions; the tops of the two quasi-zero stiffness devices are respectively connected to the ends of the two connecting rods, and the two connecting rods are movably connected to the side wall of the bearing platform.

[0006] The present invention is further configured such that: the quasi-zero stiffness device includes a vibration mechanism and an energy conversion device; the vibration mechanism is fixedly connected to the energy conversion device; the vibration mechanism includes a housing, multiple sets of fixing mechanisms, multiple inclined springs, a slider, a main spring, and an actuating rod; each set of fixing mechanisms includes two hinge supports, which are respectively fixedly connected to the side wall of the slider and the inner side wall of the housing; both ends of the inclined springs are respectively connected to the hinge supports of the same set of fixing mechanisms; the slider is sleeved on the actuating rod, the main spring is wound around the actuating rod, and the top and bottom of the main spring are respectively connected to the top of the housing and the energy conversion device; the top of the actuating rod passes through the housing and is connected to the connecting rod.

[0007] The present invention is further configured such that: the energy conversion device includes an electromagnetic actuator stator, a coil, a ball bearing, a permanent magnet, and an electromagnetic actuator mover; the bottom of the housing is fixedly connected to the battery actuator stator, the bottom of the ball bearing is fixedly connected to the bottom of the battery actuator stator, the permanent magnet is fixedly sleeved on the side wall of the ball bearing, the coil is wound around the permanent magnet, and the electromagnetic actuator mover is fixedly connected to the bottom of the actuator rod.

[0008] In summary, this invention has the following beneficial effects: The device not only fully utilizes quasi-zero stiffness technology to achieve excellent vibration isolation and energy capture effects in the low and ultra-low frequency bands, but also allows the external excitation experienced by the object to be multi-directional. From the perspective of traditional linear vibration isolation theory, it improves the vibration isolation frequency band of the vibration isolation system; from the perspective of vibration energy capture, it fully utilizes the advantages of quasi-zero stiffness in the low frequency band, effectively reducing the conversion of low-frequency vibration energy into electrical energy. Attached Figure Description

[0009] Figure 1 This is a front view of the vibration isolation platform in an embodiment of the present invention;

[0010] Figure 2 This is a side view of the vibration isolation platform in an embodiment of the present invention;

[0011] Figure 3 This is a top view of the vibration isolation platform in an embodiment of the present invention;

[0012] Figure 4 This is an isometric view of the vibration isolation platform in an embodiment of the present invention;

[0013] Figure 5 This is a schematic diagram of the vibration isolation platform base plate structure in an embodiment of the present invention;

[0014] Figure 6 This is a schematic diagram of the motor mounting base structure in the quasi-zero stiffness device of this invention.

[0015] Figure 7 This is an isometric view of the quasi-zero stiffness device in an embodiment of the present invention;

[0016] Figure 8 This is an axonometric view of the internal structure of the quasi-zero stiffness device in an embodiment of the present invention;

[0017] Figure 9 This is an axonometric view of the quasi-zero stiffness motor device in an embodiment of the present invention;

[0018] Figure 10 This is a cross-sectional view of the quasi-zero stiffness device in an embodiment of the present invention;

[0019] Figure 11 This is an isometric view of the connecting rod device in an embodiment of the present invention;

[0020] Figure 12 This is an isometric view of the upper support connector in an embodiment of the present invention;

[0021] Figure 13 This is an isometric view of the mounting base in an embodiment of the present invention.

[0022] In the diagram: 1. Platform base plate; 2. Motor mounting base; 3. Quasi-zero stiffness device; 4. Connecting rod; 5. Upper support connector; 6. Mounting base; 7. Bearing platform; 8. Hinge support; 9. Actuating rod; 10. Slider; 11. Inclined spring; 12. Electromagnetic actuator stator; 13. Main spring; 14. Coil; 15. Electromagnetic actuator mover; 16. Permanent magnet; 17. Ball bearing; 18. Housing. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be described in further detail below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the embodiments.

[0025] Example:

[0026] like Figure 1-4As shown, a multi-dimensional ultra-low frequency energy harvesting and vibration suppression integrated device includes a platform base plate 1 and a bearing platform 7. Three sets of motor mounting seats 2 are bolted to the top of the platform base plate 1. The angle between two adjacent sets of motor mounting seats 2 is 60 degrees. There are two motor mounting seats in each set, and the two motor mounting seats 2 in the same set are installed at opposite angles. A quasi-zero stiffness device 3 is fixedly installed on each motor mounting seat 2 by bolting. A connecting rod 4 is fixedly installed on the top of the quasi-zero stiffness device 3 by bolting. The connecting rods 4 corresponding to the motor mounting seats 2 in the same set are all located on the same vertical plane. The end of the connecting rod 4 away from the quasi-zero stiffness device 3 is connected to an upper support connecting plate by threading. The upper support connecting plate is hinged to the mounting seat 6. The mounting seat 6 is fixedly installed on the side wall of the bearing platform 7 by bolting.

[0027] The quasi-zero stiffness device 3 includes a housing 18, an electromagnetic actuator stator 12, an actuator rod 9, a slider 10, three sets of hinge supports 8, a main spring 13, three inclined springs 11, two coils 14, a ball bearing 17, a permanent magnet 16, and an electromagnetic actuator mover. The actuator rod 9 is bolted to the electromagnetic actuator mover 15, and the top of the actuator rod 9 passes through the top of the housing 18 and is connected to the connecting rod 4. The slider 10 is bolted to the actuator rod 9. Figure 8 As shown, each set of hinge supports 8 consists of two hinge supports 8, which are fixedly installed on the side wall of the slider 10 and the inner side wall of the housing 18, respectively. The two ends of the inclined spring 11 are connected to the two hinge supports 8 in the same set, and the three inclined springs 11 are arranged in a triangle. The main spring 13 is wound around the actuating rod 9, and the top and bottom of the main spring 13 are fixedly connected to the top of the housing 18 and the top of the slider 10, respectively. The electromagnetic actuator mover 15, permanent magnet 16, two coils 14, and ball bearing 17 are all installed on the electromagnetic actuator stator 12. The bottom of the ball bearing 17 is connected to the bottom of the electromagnetic actuator stator 12, the permanent magnet 16 is sleeved on the outer side wall of the ball bearing 17, and the two coils 14 are wound on the outer side wall of the permanent magnet 16.

[0028] Working principle:

[0029] When the platform is in a vibration environment, the quasi-zero stiffness advantage in low-frequency vibration is utilized to transmit motion to the actuator rod 9, and then to the electromagnetic actuator mover 15. Since the electromagnetic actuator mover 15 is wound with a coil 14, the coil 14 will cut the magnetic field lines in the magnetic field generated by the permanent magnet 16, thereby converting the vibration energy into electrical energy and achieving a vibration suppression effect, realizing the dual effects of energy capture and vibration isolation. Under static conditions, the main spring 13 inside the quasi-zero stiffness device 3 provides a basic load-bearing capacity. When external excitation is transmitted to the platform, the actuator 9 in the outrigger will generate relative displacement. At this time, the inner inclined spring 11, which provides negative stiffness in the quasi-zero stiffness device, will amplify the movement of the actuator 9. The movement is transmitted to the mover, and the mover is wound with the coil 14, which can make the movement of the coil 14 cutting the magnetic field lines more intense. At this time, the main spring 13 will play a role in preventing excessive deformation and providing restoring force for the actuator 9. The movement of the actuator 9 cutting the magnetic field lines converts vibration energy into electrical energy, which can effectively isolate vibration and capture vibration energy.

[0030] The above specific embodiments are merely explanations of the present invention and are not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A multi-dimensional ultra-low frequency energy harvesting and vibration suppression integrated device, comprising a platform base plate (1) and a bearing platform (7), characterized in that: Three shock-absorbing connection mechanisms are provided between the platform base plate (1) and the bearing platform (7), and the included angles between the three shock-absorbing connection mechanisms are the same; the shock-absorbing connection mechanism includes two motor mounting seats (2), two quasi-zero stiffness devices (3) and two connecting rods (4); the two motor mounting seats (2) are fixedly connected to the platform base plate (1), the two motor mounting seats (2) are installed in opposite directions, the tops of the two quasi-zero stiffness devices (3) are respectively connected to the ends of the two connecting rods (4), and the two connecting rods (4) are movably connected to the side wall of the bearing platform (7); The quasi-zero stiffness device (3) includes a vibration mechanism and an energy conversion device; the vibration mechanism is fixedly connected to the energy conversion device; the vibration mechanism includes a housing (18), multiple sets of fixing mechanisms, multiple inclined springs (11), a slider (10), a main spring (13), and an actuating rod (9); each set of fixing mechanisms includes two hinge supports (8), which are fixedly connected to the side wall of the slider (10) and the inner side wall of the housing (18) respectively; the two ends of the inclined spring (11) are connected to the hinge supports (8) of the same set of fixing mechanisms respectively; the slider (10) is sleeved on the actuating rod (9), the main spring (13) is wound around the actuating rod (9), and the top and bottom of the main spring (13) are connected to the top of the housing (18) and the energy conversion device respectively; the top of the actuating rod (9) passes through the housing (18) and is connected to the connecting rod (4).

2. The integrated device for multi-dimensional ultra-low frequency energy harvesting and vibration suppression according to claim 1, characterized in that: The energy conversion device includes an electromagnetic actuator stator (12), a coil (14), a ball bearing (17), a permanent magnet (16), and an electromagnetic actuator mover (15); the bottom of the housing (18) is fixedly connected to the battery actuator stator, the bottom of the ball bearing (17) is fixedly connected to the bottom of the battery actuator stator, the permanent magnet (16) is fixedly sleeved on the side wall of the ball bearing (17), the coil (14) is wound around the permanent magnet (16), and the electromagnetic actuator mover (15) is fixedly connected to the bottom of the actuator rod (9).

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