A magnetic spring giant electro-rheological fluid damping structure and a vibration isolator

Abstract

The present invention relates to the technical field of intelligent vibration isolators, and particularly relates to a magnetic spring giant current variable damping structure and a vibration isolator. The damping structure is provided with a coil assembly in a damping cavity and a Halbach magnetic array on the outer side of the damping cavity. The induced electromotive force generated by the relative movement of the coil assembly and the Halbach magnetic array is fed back to a plate assembly to drive the giant current variable fluid in the fluid gap between a positive plate and a negative plate to generate variable damping, realizing an integrated design of spring and damping, greatly reducing the volume of the vibration isolator and improving the integration degree.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent vibration isolators, and particularly to a magnetic spring giant electro-rheological fluid damping structure and a vibration isolator. Background Art

[0002] Giant electro-rheological fluid is a new type of voltage-controlled intelligent material, which exhibits a special rheological effect. That is, when no electric field is applied to the electro-rheological fluid, the particles inside the electro-rheological fluid are randomly distributed, and macroscopically it behaves as a Newtonian fluid; when an electric field is applied to the liquid, within a few milliseconds, the particles inside the liquid are polarized and arranged in an orderly manner, and macroscopically it shows that the stiffness and damping characteristics of the material can be adjusted with the voltage. Therefore, it can be widely used in industry and life to construct vibration isolators and reduce the vibration of heavy machinery. Compared with magneto-rheological fluid that requires continuous current to generate a complex magnetic field, giant electro-rheological fluid only needs two electrodes with a potential difference to change the viscosity characteristics of the giant electro-rheological fluid, and the overall structure is relatively simple. Therefore, through special electrode design, the integration degree can be improved and the volume can be reduced.

[0003] Both electro-rheological fluid and giant electro-rheological fluid materials need to apply voltage on two or more electrodes during the working process to form an electric field in the space between the electrodes, driving the rheological material to arrange according to the designed law and providing damping force. Since the electric field between the electrodes decays exponentially as the distance between the electrodes increases, in order to ensure sufficient electric field strength inside the vibration isolator and maintain a relatively constant damping force, a set of electrodes, or even multiple sets of array-type electrode configurations, are mostly used inside it to form sufficient electric field in a relatively large-scale space. However, the dense electrodes will cause the volume of the vibration isolator to increase rapidly. In addition, the extra high-voltage power supply is also large in volume, bringing great challenges to the design and integrated application of such vibration isolators.

[0004] To address this issue, some vibration isolators have been optimized and improved using a ring-shaped multi-layer electrode configuration. For example, a damper with multi-layer electrodes based on giant electro-rheological fluid shear valves disclosed in the Chinese invention patent with the document number CN109307038B. The ring-shaped electrodes of this damper are arranged coaxially and parallelly, and the alternating electrodes are short-circuited with the positive voltage and ground of the power supply, operating in the shear mode. This type of damper can provide a large damping force. However, this type of vibration isolator requires a large number of electrodes, making it difficult to further optimize the volume of the vibration isolator. Therefore, some electro-rheological fluid vibration isolators cleverly utilize the electromechanical effect. For example, a self-powered electro-rheological fluid damping vibration isolator disclosed in the Chinese invention patent with the document number CN106438823A. This self-powered electro-rheological fluid damping vibration isolator captures energy during mechanical movement through piezoelectricity and supplies it to the vibration isolator, coupling the power supply with the vibration isolator, eliminating the external power supply, and further reducing the volume of the vibration isolator. However, such piezoelectric vibration isolators only have a large resistance during the downward compression process and have no variable resistance during the return stroke. At the same time, due to the change in the internal cavity volume of the vibration isolator caused by the piston rod not being considered in the vibration isolator, the actual application effect is poor. In addition, this type of vibration isolator still uses ordinary springs as the support components. In high-frequency vibrations, ordinary springs will generate additional heat and cause mechanical deformation of themselves, and under heavy loads, the deformation of ordinary springs is also inevitable, so their practicality is poor in special scenarios.

[0005] Based on the above-mentioned status of the prior art, there is an urgent need in the prior art for a giant electro-rheological fluid vibration isolator with high integration, small volume, and better vibration isolation effect. Summary of the Invention

[0006] To solve the above technical problems, the purpose of the present invention is to provide a magnetic spring giant electro-rheological fluid damping structure and a vibration isolator, which have high integration, small volume, and better vibration isolation effect.

[0007] To achieve the above technical effects, the present invention adopts the following technical solutions:

[0008] In the first aspect, the present invention provides a magnetic spring giant electro-rheological fluid damping structure, which includes a housing assembly with airtightness, and further includes:

[0009] A damping cavity formed inside the housing assembly;

[0010] A Halbach magnetic array provided outside the damping cavity and used to provide an induced magnetic field for the damping cavity;

[0011] At least one set of electrode assemblies, each electrode assembly including a positive electrode plate and a negative electrode plate, with a rheological fluid gap between the positive electrode plate and the negative electrode plate, and the rheological fluid gap is used to accommodate giant electro-rheological fluid;

[0012] The floating energy harvesting component includes a force-actuating part and a floating part driven by the force-actuating part. The floating part is disposed in the damping cavity and includes at least one set of coil assemblies. The coil assemblies are used to generate an induced electromotive force and apply it to the plate assembly to generate an electric field in the rheological fluid gap. The floating energy harvesting component also has at least one energy dissipation part.

[0013] When an electric field is generated between the positive plate and the negative plate, the giant electro-rheological fluid in the rheological fluid gap can apply a shear damping force opposite to the movement direction of the floating energy harvesting component to the energy dissipation part.

[0014] Preferably, the above-mentioned magnetic spring giant electro-rheological fluid damping structure includes a housing assembly with airtightness, and further includes:

[0015] A damping cavity longitudinally formed inside the housing assembly;

[0016] At least two sets of Halbach magnetic arrays evenly distributed outside the damping cavity and used to provide an induced magnetic field for the damping cavity;

[0017] At least one set of plate assemblies, the plate assemblies include a positive plate and a negative plate, and there is a rheological fluid gap between the positive plate and the negative plate. The rheological fluid gap is used to accommodate the giant electro-rheological fluid;

[0018] The floating energy harvesting component includes a force-actuating part and a floating part driven by the force-actuating part. The floating part is disposed in the damping cavity and includes multiple sets of coil assemblies. Each set of coil assemblies at least includes a set of energy harvesting coils for cutting the magnetic field to generate an induced voltage. The energy harvesting coils are used to generate an induced electromotive force and apply it to the plate assembly to generate an electric field in the rheological fluid gap. The floating energy harvesting component also has at least one energy dissipation part, and the energy dissipation part has at least one buffer force-bearing surface that can be in direct contact with the giant electro-rheological fluid;

[0019] When an electric field is generated between the positive plate and the negative plate, the giant electro-rheological fluid in the rheological fluid gap can apply a shear damping force opposite to the movement direction of the floating energy harvesting component to the energy dissipation part.

[0020] Preferably, the floating part further includes a central permanent magnet, and multiple sets of coil assemblies are evenly distributed on the upper and lower sides of the central permanent magnet.

[0021] Preferably, the Halbach magnetic array is a linear Halbach magnetic array.

[0022] Further, each of the Halbach magnetic arrays includes a plurality of permanent magnets sequentially distributed in the longitudinal direction of the damping chamber, and the adjacent permanent magnets are arranged at 90° in the magnetization direction. Each of the Halbach magnetic arrays is fixedly connected to the housing assembly.

[0023] Further, each of the magnetic spring giant magnetorheological fluid damping structures includes two sets of plate assemblies, and the two sets of plate assemblies are symmetrically arranged on both sides of the floating energy harvesting assembly.

[0024] Further, the horizontal cross-section of the damping chamber is any one of a circle, a rectangle or a regular polygon, and is preferably a circle or a rectangle.

[0025] Further, the floating energy harvesting assembly further includes a connecting member, which is arranged between the force actuating member and the floating member and is used to connect the force actuating member and the floating member.

[0026] Further, the coil assembly includes a coil base, and at least one set or multiple sets of energy harvesting coils are wound around each coil base. Preferably, the number of the coil assemblies is an even number and is longitudinally arranged along the damping chamber, and the even number of coil assemblies are symmetrically distributed on both sides of the central permanent magnet.

[0027] Further, one of the plates in the plate assembly is fixedly connected to the housing assembly, and the other plate is fixedly connected to the floating energy harvesting assembly and serves as the energy dissipation part.

[0028] Further, the positive plate and the negative plate are both fixedly connected to the housing assembly. The floating energy harvesting assembly further includes a floating seat fixedly connected to the central permanent magnet and the coil assembly and serving as an energy dissipation part. The floating seat has at least one side wall, and the side wall can be in direct contact with the giant magnetorheological fluid in the magnetorheological fluid gap.

[0029] Further, it further includes a voltage transformation assembly for boosting the induced voltage and loading it onto the plate assembly.

[0030] In a second aspect, the present invention further provides a magnetic spring giant magnetorheological fluid vibration isolator including the magnetic spring giant magnetorheological fluid damping structure provided in the first aspect above.

[0031] Further, a magnetic spring giant magnetorheological fluid vibration isolator provided by the present invention further includes a mounting seat, and a plurality of magnetic spring giant magnetorheological fluid damping structures are evenly distributed on the mounting seat. The housing assembly of the magnetic spring giant magnetorheological fluid damping structure is fixedly connected to the mounting seat, and the force actuating member of the magnetic spring giant magnetorheological fluid damping structure can move up and down relative to the mounting seat.

[0032] Further, it further includes an upper connecting seat, a lower connecting seat, and a plurality of air bearings. The air bearing includes an outer bearing ring and an air shaft disposed inside the outer bearing ring. The mounting seat is located between the upper connecting seat and the lower connecting seat and is fixedly connected to the lower connecting seat through the outer bearing ring. The top ends of the air shaft and the force actuating component are both fixedly connected to the upper connecting seat.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] First of all, a magneto-spring giant electro-rheological fluid damping structure provided by the present invention adopts a damping cavity arranged inside a housing, and Halbach magnetic arrays are arranged on both sides of the damping cavity to provide a strong magnetic field for the damping cavity. At the same time, an energy harvesting coil and a central permanent magnet are integrated in the damping cavity to form a magneto-spring structure. Through optimized magnetic field and energy harvesting coil designs, when the magneto-spring giant electro-rheological fluid damping structure works, the energy of an external vibration source captured can be converted into voltage, and a high voltage is generated by a boosting component and supplied to a plate assembly to achieve the purpose of integrated energy supply and vibration isolation. In this magneto-spring giant electro-rheological fluid damping structure, since the magneto-spring composed of a coil assembly and a central permanent magnet can withstand high voltage without being damaged, and the above magneto-spring overcomes the deficiencies of traditional springs such as creep and mechanical fatigue when supporting vibration isolators, the magneto-spring has the advantages of not deforming under heavy loads and being able to reduce the heat generated by the actuator to prevent mechanical deformation. Therefore, it is very suitable for applications in high-voltage, high-frequency, and heavy-load scenarios. At the same time, in this magneto-spring giant electro-rheological fluid damping structure, through a reasonable design of the plate assembly, the overall size of the magneto-spring giant electro-rheological fluid damping structure can be significantly reduced, making it have high integration, small volume, and better vibration isolation effect. In addition, when the vibration isolator is working normally, no external energy supply is required, avoiding additional energy consumption.

[0035] Secondly, a magneto-spring giant electro-rheological fluid vibration isolator provided by the present invention integrates a plurality of the above magneto-spring giant electro-rheological fluid damping structures. At the same time, with the cooperation of a plurality of air bearings, the magneto-spring giant electro-rheological fluid vibration isolator has good vibration isolation effect and long service life. When the magneto-spring giant electro-rheological fluid vibration isolator works, the induced electromotive force generated by the relative movement between the coil assembly and the Halbach magnetic array is fed back to the plate assembly to drive the giant electro-rheological fluid in the variable damping gap between the positive plate and the negative plate to generate variable damping, realizing the integrated design of spring and damping, greatly reducing the volume of the vibration isolator, and improving the integration. Description of the Drawings

[0036] Figure 1 It is a schematic diagram of the overall structure of a magneto-spring giant electro-rheological fluid damping structure provided by Embodiment 1 of the present invention;

[0037] Figure 2Schematic longitudinal sectional structure diagram of a magnetic spring giant electro-rheological fluid damping structure provided in Embodiment 1 of the present invention;

[0038] Figure 3 Schematic overall structure diagram of a magnetic spring giant electro-rheological fluid isolator provided in Embodiment 2 of the present invention;

[0039] Figure 4 Schematic overall structure diagram of a magnetic spring giant electro-rheological fluid damping structure provided in Embodiment 3 of the present invention;

[0040] Figure 5 Longitudinal sectional structure of a magnetic spring giant electro-rheological fluid damping structure provided in Embodiment 3 of the present invention;

[0041] Figure 6 Schematic overall structure diagram of a magnetic spring giant electro-rheological fluid damping structure provided in Embodiment 4 of the present invention;

[0042] Figure 7 Longitudinal sectional structure of a magnetic spring giant electro-rheological fluid damping structure provided in Embodiment 4 of the present invention;

[0043] Figure 8 Transverse sectional structure of a magnetic spring giant electro-rheological fluid damping structure provided in Embodiment 4 of the present invention;

[0044] Figure 9 Schematic diagram of a partially enlarged structure at A of a magnetic spring giant electro-rheological fluid damping structure provided in Embodiment 4 of the present invention;

[0045] Reference numerals are: 10, housing assembly; 11, damping chamber; 12, Halbach magnetic array; 21, force actuator component; 22, connecting piece; 23, floating component; 231, central permanent magnet; 232, coil assembly; 232a, coil base; 232b, energy harvesting coil; 30, plate assembly; 31, positive plate; 32, negative plate; 41, upper connecting seat; 42, lower connecting seat; 43, mounting seat; 44, guiding bearing; 451, bearing outer ring; 452, air-floating shaft; 51, fixed seat; 52, floating seat; 521, internal component; 522, convex part; 522a, buffer stress-bearing surface. Detailed implementation manners

[0046] The embodiments of the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and thus are only examples and cannot be used to limit the protection scope of the present invention.

[0047] Unless otherwise specified, in the present invention, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "x-direction", "y-direction", "z-direction", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for exemplary illustration and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood by combining the drawings and according to specific circumstances.

[0048] Example 1

[0049] Please refer to Figures 1 - 2, this embodiment provides a magnetic spring giant magnetorheological fluid damping structure, which includes a housing assembly 10, two sets of Halbach magnetic arrays 12, a floating energy harvesting component, and two sets of plate assemblies 30. Among them, the housing assembly 10 has airtightness to facilitate the accommodation of internal devices. More specifically, a damping chamber 11 with a rectangular cross-section is provided inside the housing assembly 10. The above two sets of Halbach magnetic arrays 12 are respectively arranged on both sides of the damping chamber 11 and are used to provide an induced magnetic field for the damping chamber 11. The floating energy harvesting component includes a force actuator 21, a connecting member 22, and a floating member 23. The force actuator 21, the connecting member 22, and the floating member 23 are arranged in sequence from top to bottom along the damping chamber 11 and are fixedly connected in sequence. The connecting member 22 and the floating member 23 are both arranged inside the damping chamber 11. The top end of the force actuator 21 is located outside the housing assembly 10, and the bottom end of the force actuator 21 extends into the damping chamber 11 and is fixedly connected to the connecting member 22, so that when the force actuator 21 is subjected to an external force, it can drive the connecting member 22 and the floating member 23 to slide up and down inside the damping chamber 11. More specifically, the floating member 23 specifically includes a central permanent magnet 231 and an even number of coil assemblies 232 symmetrically distributed on the upper and lower sides of the central permanent magnet 231. Among them, each coil assembly 232 includes a coil base 232a, the coil base 232a is horizontally arranged, and at least one or more sets of energy harvesting coils 232b are wound on each coil base 232a. When the floating member 23 slides up and down inside the damping chamber 11, it can drive the coil assembly 232 to cut the magnetic field to generate an induced voltage. Correspondingly, the positive output terminal and the negative output terminal of the energy harvesting coil 232b are respectively connected to the positive plate 31 and the negative plate 32, so that an electric field is generated between the positive plate 31 and the negative plate 32. It should be noted that in actual implementation, the positive output terminal and the negative output terminal of the energy harvesting coil 232b can also be respectively connected to the negative plate 32 and the positive plate 31.

[0050] In this embodiment, the above two sets of plate assemblies 30 are respectively arranged on both sides of the floating member 23. More specifically, each set of the plate assemblies 30 includes a positive plate 31 and a negative plate 32. Among them, the top end of the positive plate 31 in each set of the plate assemblies 30 is fixedly connected to the connecting member 22, and there is a gap between the bottom end of the positive plate 31 and the inner side surface of the bottom plate of the housing assembly 10. The negative plate 32 in this plate assembly 30 is arranged outside the positive plate 31 and is used to separate the damping chamber 11. A rheological fluid gap is formed between the positive plate 31 and the negative plate 32 between each set of the plate assemblies 30. This rheological fluid gap communicates with the damping chamber 11. The damping chamber 11 is filled with giant electro-rheological fluid and this giant electro-rheological fluid can flow and fill into the rheological fluid gap. Thus, when the above floating member 23 moves downward under the drive of the force actuating member 21, an induced voltage is generated between the positive plate 31 and the negative plate 32, so that the viscosity characteristic of the giant electro-rheological fluid located between this rheological fluid gap increases under the action of the electric field. Therefore, when the positive plate 31 moves downward along with the connecting member 22, the positive plate 31 serves as an energy dissipation part, and the giant electro-rheological fluid with the increased viscosity characteristic can apply a shear damping force opposite to its moving direction to the positive plate 31. At this time, the outer side surface of the positive plate 31 is in direct contact with the giant electro-rheological fluid. It should be specially noted that in this magnetic spring giant electro-rheological fluid damping structure, the positions of the positive plate 31 and the negative plate 32 in each set of the plate assemblies 30 can be exchanged.

[0051] In this embodiment, in order to provide a strong magnetic field to the damping chamber 11, each set of Halbach magnetic arrays 12 includes a plurality of permanent magnets distributed in sequence along the longitudinal direction of the damping chamber 11, and the adjacent permanent magnets are arranged with a 90° magnetization direction. Each set of the Halbach magnetic arrays 12 is located between the negative plate 32 and the housing assembly 10 and is fixedly connected to the housing assembly 10. The setting of this Halbach magnetic array 12 greatly compresses the volume of this magnetic spring giant electro-rheological fluid damping structure and can effectively increase the magnetic field strength in the damping chamber 11.

[0052] In this embodiment, this magnetic spring giant electro-rheological fluid damping structure further includes a voltage transformation component (not shown in the drawings). This voltage transformation component can be fixedly installed on the connecting member 22 and is used to boost the induced voltage generated by the coil assembly 232 and load it onto the plate assembly 30. It should be noted that the connection manner of the coil assembly 232, the voltage transformation component, and the plate assembly 30 is a prior art, and the voltage transformation component also belongs to the prior art. Therefore, it will not be elaborated here.

[0053] When the magneto-spring giant electro-rheological fluid damping structure provided in this embodiment is working, the force-actuating component 21 can move downward relative to the housing assembly 10 under the influence of external vibration. During this process, the connecting component 22 and the floating component 23 are driven to move downward. At this time, since the coil assembly 232 of the floating component 23 cuts the magnetic field, an induced voltage is generated, and thus an electric field is generated in the electro-rheological fluid gap between the positive plate 31 and the negative plate 32. The viscosity characteristics of the giant electro-rheological fluid in the electro-rheological fluid gap increase under the action of the electric field. Therefore, during the downward movement of the connecting component 22 and the positive plate 31, an upward shear damping force is applied to the positive plate 31, thereby achieving a vibration isolation effect.

[0054] Embodiment 2

[0055] Please refer to Figure 3 , this embodiment provides a magneto-spring giant electro-rheological fluid vibration isolator, which includes a plurality of magneto-spring giant electro-rheological fluid damping structures provided in the above Embodiment 1. The specific structure of the magneto-spring giant electro-rheological fluid vibration isolator is as follows:

[0056] In this embodiment, the magneto-spring giant electro-rheological fluid vibration isolator includes an upper connecting seat 41, a lower connecting seat 42, a mounting seat 43, a plurality of magneto-spring giant electro-rheological fluid damping structures provided in the above Embodiment 1, and a plurality of air bearings. Specifically, the upper connecting seat 41 and the lower connecting seat 42 are arranged opposite to each other, the mounting seat 43 is arranged between the upper connecting seat 41 and the lower connecting seat 42, and a plurality of magneto-spring giant electro-rheological fluid damping structures are located between the upper connecting seat 41 and the lower connecting seat 42 and are evenly arranged at intervals along the circumference of the mounting seat 43 to achieve a zero horizontal resultant force.

[0057] In this embodiment, each magneto-spring giant electro-rheological fluid damping structure includes a housing assembly 10, and the housing assembly 10 is fixedly connected to the mounting seat 43 to realize the connection between the magneto-spring giant electro-rheological fluid damping structure and the mounting seat 43. Each magneto-spring giant electro-rheological fluid damping structure includes a force-actuating component 21, the force-actuating component 21 is in the shape of a shaft rod and is slidably connected to the housing assembly 10. The top end of the force-actuating component 21 is located outside the housing assembly 10 and is connected to the upper connecting seat 41 through a guide bearing 44. To realize the connection between the upper connecting seat 41 and the lower connecting seat 42, a plurality of air bearings are arranged between the upper connecting seat 41 and the lower connecting seat 42. Specifically, the air bearing includes an outer bearing ring 451 and an air float shaft 452 floatingly assembled inside the outer bearing ring 451. The mounting seat 43 is fixedly connected to the lower connecting seat 42 through the outer bearing ring 451, and the top end of the air float shaft 452 is fixedly connected to the upper connecting seat 41. It should be noted that in the above air bearing, the assembly method of the outer bearing ring 451 and the air float shaft 452 is a prior art, so it will not be elaborated here.

[0058] In this embodiment, the magnetic spring giant electrorheological fluid vibration isolator adopts an air bearing as a supporting and guiding component, which can further improve the shock absorption effect and service life of the magnetic spring giant electrorheological fluid vibration isolator. At the same time, the magnetic spring giant electrorheological fluid vibration isolator can also achieve no deformation under heavy load and reduce the heat generated by the actuator during the shock absorption and vibration isolation process to avoid and prevent mechanical deformation. Therefore, it can be suitable for high-voltage, high-frequency, and heavy-load application scenarios.

[0059] Example 3

[0060] See also Figures 4 - 5 The difference between the magnetic spring giant electrorheological fluid damping structure provided in this embodiment and the embodiment 1 is that the cross section of the damping cavity 11 of the magnetic spring giant electrorheological fluid damping structure provided in this embodiment is circular, and the magnetic spring giant electrorheological fluid damping structure only includes one set of electrode plate assemblies 30. More specifically:

[0061] In this embodiment, a group of electrode plates 30 are arranged in the shell assembly 10, and the electrode plate assembly 30 includes a positive electrode plate 31 and a negative electrode plate 32. The positive electrode plate 31 is located on the inner side of the negative electrode plate 32, and the positive electrode plate 31 and the negative electrode plate 32 are both circular and the positive electrode plate 31 and the negative electrode plate 32 are coaxially arranged. The top end of the positive electrode plate 31 is fixedly connected to the connecting member 22, and a gap is left between the bottom end of the positive electrode plate 31 and the inner side surface of the bottom plate of the shell assembly 10, so that the positive electrode plate 31 can move up and down with the connecting member 22. In addition, a rheological fluid gap is formed between the positive plate 31 and the negative plate 32. The damping chamber 11 is filled with giant electrorheological fluid, and part of the giant electrorheological fluid is located in the rheological fluid gap. The floating component 23 is located on the inner side of the positive plate 31 and is fixedly connected to the connecting member 22, so that the connecting member 22, the floating component 23 and the positive plate 31 can move synchronously. When the floating component 23 moves downward, the induced voltage generated by the coil assembly 232 causes an electric field to be generated between the positive plate 31 and the negative plate 32. The above electric field increases the viscosity characteristics of the giant electrorheological fluid located in the rheological fluid gap. The outer surface of the positive plate 31 is in direct contact with the giant electrorheological fluid. Therefore, the positive plate 31 acts as an energy dissipation part. The giant electrorheological fluid exerts an upward shear damping force on the positive plate 31 to achieve shock absorption and vibration isolation effects.

[0062] Example 4

[0063] See also Figures 6 - 9 The difference between the magnetic spring giant electrorheological fluid damping structure provided in this embodiment and the embodiment 1 is that the cross section of the damping cavity 11 of the magnetic spring giant electrorheological fluid damping structure provided in this embodiment is circular, and the magnetic spring giant electrorheological fluid damping structure includes two sets of electrode plate assemblies 30. More specifically:

[0064] In this embodiment, a magneto-spring giant electro-rheological fluid damping structure provided in this embodiment further includes a fixed seat 51 and a floating seat 52, and both the fixed seat 51 and the floating seat 52 are made of electrically insulating materials. Specifically, the fixed seat 51 is in an annular shape and is used to partition a damping cavity 11 within the housing assembly 10. The floating seat 52 is coaxially arranged inside the fixed seat 51, and the floating seat 52 can move up and down along with the connecting member 22. Two sets of the plate assemblies 30 are arranged between the floating seat 52 and the fixed seat 51.

[0065] In this embodiment, each set of the plate assemblies 30 includes a positive plate 31 and a negative plate 32. Both the negative plate 32 and the positive plate 31 are in an arc plate-like structure. The negative plate 32 is fixedly installed on the inner side surface of the fixed seat 51, and the positive plate 31 is fixedly installed inside the negative plate 32 and fixedly connected to the housing assembly 10. A rheological fluid gap is formed between the positive plate 31 and the negative plate 32 for accommodating the giant electro-rheological fluid.

[0066] In this embodiment, there is a gap between the two positive plates 31. The floating seat 52 includes two relatively arranged internal members 521. The internal members 521 are arranged inside the two sets of positive plates 31, and the tops of the internal members 521 are fixedly connected to the connecting member 22 so that the internal members 521 can move up and down along with the connecting member 22. A convex portion 522 is fixedly connected to both ends of each internal member 521. The convex portion 522 is in a plate-like structure. One end of the convex portion 522 is fixedly connected to the internal member 521, and the other end passes through the gap between the two sets of positive plates 31 and extends into the rheological fluid gap, so that the outer side surface of the convex portion 522 can serve as a buffer stress-bearing surface 522a and be in direct contact with the giant electro-rheological fluid within the rheological fluid gap. Thus, the floating seat 52 serves as an energy dissipation portion to dissipate external vibrations.

[0067] When the magneto-spring giant electro-rheological fluid damping structure provided in this embodiment is working, when the force actuating component 21 moves downward under an external force, it can drive the connecting member 22, the floating component 23, and the internal member 521 to move downward synchronously. At this time, the induced voltage generated by the energy harvesting coil 232b in the floating component 23 can generate an electric field within the rheological fluid gap between each set of plate assemblies 30 and act on the giant electro-rheological fluid to increase its viscosity characteristics. Thus, the giant electro-rheological fluid can apply a shear damping force opposite to its movement direction to the buffer stress-bearing surface 522a to dissipate external vibrations and achieve the effects of shock absorption and vibration isolation.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the gist and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. A magnetic spring giant electro-rheological fluid damping structure, comprising a housing assembly (10), characterized in that, It further includes: A damping cavity (11), formed inside the housing assembly (10); A Halbach magnetic array (12), provided outside the damping cavity (11) and used to provide an induced magnetic field for the damping cavity (11); At least one set of plate assemblies (30), the plate assembly (30) includes a positive plate (31) and a negative plate (32), and there is a rheological fluid gap between the positive plate (31) and the negative plate (32), and the rheological fluid gap is used to accommodate giant electro-rheological fluid; A floating energy harvesting assembly, including a force-actuating component (21) and a floating component (23) driven by the force-actuating component (21), the floating component (23) is arranged inside the damping cavity (11) and includes at least one set of coil assemblies (232) and a central permanent magnet (231), the coil assembly (232) is used to generate an induced electromotive force and load it onto the plate assembly (30) to generate an electric field in the rheological fluid gap; the floating energy harvesting assembly also has at least one energy dissipation part; one of the plates in the plate assembly (30) is fixedly connected to the housing assembly (10), and the other plate is fixedly connected to the floating energy harvesting assembly and serves as the energy dissipation part; When an electric field is generated between the positive plate (31) and the negative plate (32), the giant electro-rheological fluid in the rheological fluid gap can apply a shear damping force opposite to the movement direction of the floating energy harvesting assembly to the energy dissipation part.

2. The magneto-spring giant electro-rheological fluid damping structure according to claim 1, characterized in that: Each set of the Halbach magnetic arrays (12) includes a plurality of permanent magnets arranged in sequence along the longitudinal direction of the damping cavity (11), and the adjacent permanent magnets are arranged with a 90° magnetization direction, and each set of the Halbach magnetic arrays (12) is fixedly connected to the housing assembly (10).

3. A magnetic spring giant electro-rheological fluid damping structure according to claim 1, characterized in that: The horizontal cross-section of the damping cavity (11) is any one of a circle, a rectangle or a regular polygon.

4. A magnetic spring giant electro-rheological fluid damping structure according to claim 1, characterized in that: Each set of coil assemblies (232) includes a coil base (232a), and at least one set or multiple sets of energy harvesting coils (232b) are wound around each coil base (232a).

5. The magneto-spring giant electro-rheological fluid damping structure according to claim 1, characterized in that: Both the positive plate (31) and the negative plate (32) are fixedly connected to the housing assembly (10), and the floating energy harvesting assembly further includes a floating seat (52), the floating seat (52) has at least a buffer stress surface (522a), and the buffer stress surface (522a) can be in direct contact with the giant electro-rheological fluid in the rheological fluid gap.

6. A magneto-spring giant electro-rheological fluid damping structure according to claim 1, characterized in that: It further includes a voltage transformation component for boosting the induced voltage and loading it onto the plate assembly (30).

7. A magnetic spring giant magnetorheological fluid vibration isolator, characterized in that: It includes the magneto-spring giant electro-rheological fluid damping structure according to any one of claims 1 to 6.

8. The magneto-spring giant electro-rheological fluid vibration isolator according to claim 7, characterized in that: It further includes a mounting seat (43), and a plurality of magneto-spring giant electro-rheological fluid damping structures are evenly distributed on the mounting seat (43), the housing assembly (10) of the magneto-spring giant electro-rheological fluid damping structure is fixedly connected to the mounting seat (43), and the force-actuating component (21) of the magneto-spring giant electro-rheological fluid damping structure can move up and down relative to the mounting seat (43).

9. The magneto-spring giant electro-rheological fluid vibration isolator according to claim 8, characterized in that: It further includes an upper connecting seat (41), a lower connecting seat (42) and a plurality of air bearing shafts (452). The air bearing shaft (452) includes an outer bearing ring (451) and an air bearing shaft (452) disposed inside the outer bearing ring (451). The mounting seat (43) is located between the upper connecting seat (41) and the lower connecting seat (42) and is fixedly connected to the lower connecting seat (42) through the outer bearing ring (451). The top of the air bearing shaft (452) and the top of the force actuating component (21) are both fixedly connected to the upper connecting seat (41).

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