A three-dimensional impact-resistant composite damper based on active control

Abstract

The application discloses a kind of metal rubber three-dimensional anti-shock composite damper based on active control, including damping support framework, top end pressure disc, top end sealing disc, top end square spring shape memory alloy, first vertical damping high-density metal rubber, first lateral damping low-density metal rubber, bottom end sealing disc, bottom end pressure disc, bottom end square spring shape memory alloy, second vertical damping high-density metal rubber, second lateral damping low-density metal rubber, power supply.The application uses high-density combination type structure metal rubber with high damping performance and square spring high-elasticity shape memory alloy as damping element, when bearing external high load, the rigidity characteristics of shape memory alloy can be changed by active control power-on method, thereby indirectly improving the rigidity of metal rubber, so as to achieve overload protection;High-low-density composite metal rubber assembly is used to realize three-dimensional damping, and the phenomenon that traditional high-speed centrifugal state horizontal damping effect is poor is solved.

Description

Technical Field

[0001] This invention relates to the field of vibration damping equipment for aerospace equipment, and in particular to a metal-rubber three-dimensional impact-resistant composite vibration damper based on active control. Background Technology

[0002] Vibration isolation technology plays a crucial role in the aerospace field. Aircraft and spacecraft are affected by structural dynamics, aerodynamic environment, and aeroelastic response characteristics. In particular, the powerful impact forces generated during launch and orbit insertion can damage airborne equipment and structures, and degrade payload stability. Traditional vibration isolators have only a single resonant frequency and their damping stiffness is not adjustable, which poses the risk of amplifying vibrations near the resonant frequency and fails to solve the complex vibration resistance challenges faced in the aerospace industry.

[0003] Metal rubber, also known as metal mesh or wound metal wire material, is a porous damping material with properties similar to elastic rubber. Metal rubber materials excel in damping due to their high damping performance, controllable porosity (or relative density), and strong environmental adaptability. They can be fully utilized in various harsh environments, such as vibration reduction in aerospace equipment, vibration and noise reduction in ship equipment, and impact resistance in precision instruments. At the micrometer scale, the mechanical properties of metal rubber are mainly determined by the dissipation of vibration energy through the internal mesh structure and the dry friction between the wire turns. While metal materials are excellent damping materials due to their vibration reduction performance in special service environments, their stiffness cannot be changed after fabrication, leading to problems such as insufficient stiffness or excessive stiffness in applications. The emergence of shape memory alloys (SMA) has brought opportunities for variable stiffness.

[0004] SMA has a higher energy-to-weight ratio than other smart materials. When the transformation between the austenitic and martensitic phases occurs, due to the different values ​​of Young's modulus of SMA, SMA can be directly used as a variable stiffness element, making it a foreseeable candidate material in the aerospace field, which has stringent requirements for low energy consumption, structural miniaturization and cost-effectiveness.

[0005] To address the vibration issues in high-precision airborne equipment, a metal-rubber three-dimensional impact-resistant composite vibration damper with active control, integrating dustproof sealing, three-dimensional flexible vibration reduction, and high load stiffness, was developed to reduce the vibration characteristics of the equipment under harsh working conditions or during start-up and transportation. Summary of the Invention

[0006] The purpose of this invention is to design a metal-rubber three-dimensional impact-resistant composite vibration damper based on active control in order to solve the above problems.

[0007] The present invention achieves the above objectives through the following technical solutions:

[0008] A metal-rubber three-dimensional impact-resistant composite vibration damper based on active control, comprising:

[0009] Vibration damping support frame; The vibration damping support frame includes rods, upper mounting plate, lower mounting plate, and middle mounting plate, which are installed on the rods from top to bottom.

[0010] Top pressure plate;

[0011] Top sealing plate; top pressure plate is slidably fitted onto the outside of the second end of the top sealing plate; the first end of the top sealing plate is in contact with the upper end face of the upper mounting plate;

[0012] Top-mounted rectangular spring shape memory alloy;

[0013] The first vertical vibration damping high-density metal rubber;

[0014] The first lateral vibration damping low-density metal rubber; the first lateral vibration damping low-density metal rubber is fitted on the rod, the first vertical vibration damping high-density metal rubber is fitted outside the first lateral vibration damping low-density metal rubber, the top rectangular spring shape memory alloy is fitted outside the first lateral vibration damping low-density metal rubber; the top rectangular spring shape memory alloy, the first vertical vibration damping high-density metal rubber, and the first lateral vibration damping low-density metal rubber are all placed inside the top sealing plate, the first end of the top rectangular spring shape memory alloy, the first end of the first vertical vibration damping high-density metal rubber, and the first lateral vibration damping low-density metal rubber are all in contact with the bottom inner side of the first end of the top sealing plate, and the second end of the top rectangular spring shape memory alloy, the second end of the first vertical vibration damping high-density metal rubber, and the second end of the first lateral vibration damping low-density metal rubber are all in contact with the bottom inner side of the first end of the top pressure plate;

[0015] Bottom sealing plate; the top sealing plate is the same as the bottom sealing plate. Both the top sealing plate and the bottom sealing plate are formed into hollow cylinders, and a through hole is provided at the center of the first end, while the second end is open.

[0016] Bottom pressure plate; the top pressure plate is the same as the bottom pressure plate, both of which are formed into hollow cylinders, with a through hole at the center of the first end and an open second end; the outer diameter of the top sealing plate and the bottom sealing plate is smaller than the inner diameter of the top pressure plate and the bottom pressure plate; the bottom pressure plate can be slidably fitted onto the outside of the second end of the bottom sealing plate; the first end of the bottom sealing plate is in contact with the lower end face of the lower mounting plate;

[0017] The bottom-end rectangular spring is made of shape memory alloy.

[0018] The second vertical vibration damping high-density metal rubber;

[0019] The second lateral vibration damping low-density metal rubber; the first vertical vibration damping high-density metal rubber, the first lateral vibration damping low-density metal rubber, the second vertical vibration damping high-density metal rubber, and the second lateral vibration damping low-density metal rubber are all formed into cylindrical rings; the second lateral vibration damping low-density metal rubber is fitted onto the rod, the second vertical vibration damping high-density metal rubber is fitted onto the outside of the second lateral vibration damping low-density metal rubber, and the bottom end rectangular spring shape memory alloy is fitted onto the outside of the second lateral vibration damping low-density metal rubber; the bottom end rectangular spring shape memory alloy, The high-density metal rubber for second vertical vibration damping and the low-density metal rubber for second lateral vibration damping are both placed inside the bottom sealing plate. The first end of the bottom rectangular spring shape memory alloy, the first end of the high-density metal rubber for second vertical vibration damping, and the first end of the low-density metal rubber for second lateral vibration damping are all in contact with the bottom inner side of the first end of the bottom sealing plate. The second end of the bottom rectangular spring shape memory alloy, the second end of the high-density metal rubber for second vertical vibration damping, and the second end of the low-density metal rubber for second lateral vibration damping are all in contact with the bottom inner side of the first end of the bottom pressure plate.

[0020] The upper fixing component is used to limit the upward displacement of the top pressure plate; the upper fixing component is installed on the upper end of the rod; the vibration isolation equipment is installed on the upper fixing component and the middle mounting plate;

[0021] The lower fixing component is used to limit the downward displacement of the bottom pressure plate; the lower fixing component is installed at the lower end of the rod.

[0022] Power supplies for heating the top and bottom rectangular spring shape memory alloys; the power supplies are connected to power the top and bottom rectangular spring shape memory alloys respectively.

[0023] Preferably, the upper mounting plate, the middle mounting plate, and the lower mounting plate are arranged in parallel to each other.

[0024] Preferably, the upper fixing member and the middle mounting plate are provided with multiple axial mounting holes, and the vibration isolation equipment is fixed to the upper fixing member or the middle mounting plate by bolts passing through the mounting holes.

[0025] Preferably, the upper fixing member is a bearing pressure plate, the lower end of which is provided with a screw hole, and the upper end of the rod is provided with an external thread, and the bearing pressure plate is threadedly connected to the upper end of the rod.

[0026] Preferably, the lower fixing member is a nut, and an external thread is provided at the lower end of the rod, and the nut is threadedly connected to the lower end of the rod.

[0027] Preferably, both the second end sidewall of the first vertical vibration-damping high-density metal rubber and the second vertical vibration-damping high-density metal rubber are provided with annular protrusions. The edge of the annular protrusion of the first vertical vibration-damping high-density metal rubber is located between the second end face of the top sealing plate and the inner side of the first end of the top pressure plate; the edge of the annular protrusion of the second vertical vibration-damping high-density metal rubber is located between the second end face of the bottom sealing plate and the inner side of the first end of the bottom pressure plate.

[0028] The beneficial effects of this invention are as follows:

[0029] This application employs a high- and low-density composite structure of metal-rubber with high damping performance and a high-elasticity shape memory alloy for the spring as vibration damping elements. When subjected to high external loads, the stiffness characteristics of the shape memory alloy can be indirectly improved by actively controlling the energizing method and changing the temperature, thereby achieving overload protection. Simultaneously, the entire vibration damper adopts an enclosed composite structure, enabling sealed and dust-free applications. Furthermore, the use of high- and low-density composite metal-rubber components achieves three-dimensional vibration damping, solving the problem of poor horizontal vibration damping performance under traditional high-speed centrifugal conditions. Attached Figure Description

[0030] Figure 1 This is a perspective view of the present invention;

[0031] Figure 2 This is a planar sectional view of the present invention;

[0032] Figure 3 This is a three-dimensional sectional view of the present invention;

[0033] Figure 4 This is an exploded view of the present invention;

[0034] In the diagram: 1-Bearing pressure plate, 2-Top pressure plate, 3-Top sealing plate, 4-Top rectangular spring shape memory alloy, 5-Bottom sealing plate, 6-Bottom pressure plate, 7-Bottom rectangular spring shape memory alloy, 8-High-density metal rubber for first vertical vibration damping, 9-Low-density metal rubber for first lateral vibration damping, 10-Vibration damping support frame, 11-High-density metal rubber for second vertical vibration damping, 12-Low-density metal rubber for second lateral vibration damping, 13-Nut, 14-Power supply. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0042] like Figure 1-4 As shown, a metal-rubber three-dimensional impact-resistant composite vibration damper based on active control includes:

[0043] Vibration damping support frame 10; the vibration damping support frame 10 includes a rod, an upper mounting plate, a lower mounting plate, and a middle mounting plate, the upper mounting plate, the middle mounting plate, and the lower mounting plate are installed on the rod in sequence from top to bottom; the upper mounting plate, the middle mounting plate, and the lower mounting plate are arranged parallel to each other.

[0044] Top pressure plate 2;

[0045] Top sealing disc 3; top pressure disc 2 is slidably fitted onto the outside of the second end of top sealing disc 3; the first end of top sealing disc 3 is in contact with the upper end surface of the upper mounting disc;

[0046] Shape memory alloy 4 is used for top-end springs with variable stiffness under high load conditions;

[0047] The first vertical vibration damping high-density metal rubber 8;

[0048] The first lateral vibration damping low-density metal rubber 9 is fitted onto the rod, the first vertical vibration damping high-density metal rubber 8 is fitted onto the outside of the first lateral vibration damping low-density metal rubber 9, and the top rectangular spring shape memory alloy 4 is fitted onto the outside of the first lateral vibration damping low-density metal rubber 9; the top rectangular spring shape memory alloy 4, the first vertical vibration damping high-density metal rubber 8, and the first lateral vibration damping low-density metal rubber 9 are all placed inside the top sealing plate 3, the first end of the top rectangular spring shape memory alloy 4, the first end of the first vertical vibration damping high-density metal rubber 8, and the first lateral vibration damping low-density metal rubber 9 are all in contact with the bottom inner side of the first end of the top sealing plate 3, and the second end of the top rectangular spring shape memory alloy 4, the second end of the first vertical vibration damping high-density metal rubber 8, and the second end of the first lateral vibration damping low-density metal rubber 9 are all in contact with the bottom inner side of the first end of the top pressure plate 2;

[0049] Bottom sealing disc 5; Top sealing disc 3 is the same as bottom sealing disc 5. Both top sealing disc 3 and bottom sealing disc 5 are formed into hollow cylinders, and a through hole is provided at the center of the first end, while the second end is open.

[0050] Bottom pressure plate 6; Top pressure plate 2 is the same as bottom pressure plate 6, both top pressure plate 2 and bottom pressure plate 6 are formed into hollow cylinders, and a through hole is provided at the center of the first end, and the second end is open; the outer diameter of top sealing plate 3 and bottom sealing plate 5 is smaller than the inner diameter of top pressure plate 2 and bottom pressure plate 6; bottom pressure plate 6 can be slidably fitted on the outside of the second end of bottom sealing plate 5; the first end of bottom sealing plate 5 is in contact with the lower end surface of the lower mounting plate;

[0051] Second vertical vibration damping high-density metal rubber 11;

[0052] The second lateral vibration damping low-density metal rubber 12; the first vertical vibration damping high-density metal rubber 8, the first lateral vibration damping low-density metal rubber 9, the second vertical vibration damping high-density metal rubber 11, and the second lateral vibration damping low-density metal rubber 12 are all formed into cylindrical rings; the second lateral vibration damping low-density metal rubber 12 is fitted onto the rod, the second vertical vibration damping high-density metal rubber 11 is fitted onto the outside of the second lateral vibration damping low-density metal rubber 12, and the bottom end rectangular spring shape memory alloy 7 is fitted onto the outside of the second lateral vibration damping low-density metal rubber 12; the bottom end rectangular spring shape memory alloy 7 The high-density metal rubber 11 for second vertical vibration damping and the low-density metal rubber 12 for second lateral vibration damping are both placed inside the bottom sealing plate 5. The first end of the bottom rectangular spring shape memory alloy 7, the first end of the high-density metal rubber 11 for second vertical vibration damping, and the first end of the low-density metal rubber 12 for second lateral vibration damping are all in contact with the bottom inner side of the first end of the bottom sealing plate 5. The second end of the bottom rectangular spring shape memory alloy 7, the second end of the high-density metal rubber 11 for second vertical vibration damping, and the second end of the low-density metal rubber 12 for second lateral vibration damping are all in contact with the bottom inner side of the first end of the bottom pressure plate 6.

[0053] Bottom-end rectangular spring shape memory alloy 7;

[0054] The bearing pressure plate 1 is used to limit the upward displacement of the top pressure plate 2; the lower end of the bearing pressure plate 1 is provided with a screw hole, and the upper end of the rod is provided with an external thread, and the bearing pressure plate 1 is threadedly connected to the upper end of the rod. The middle mounting plate and the vibration isolation equipment are both provided with six axial mounting holes on the disc-shaped structure on the upper part of the bearing pressure plate 1; the vibration isolation equipment is fixed to the middle mounting plate or the bearing pressure plate 1 by bolts passing through the mounting holes.

[0055] Nut 13 is used to limit the downward displacement of the bottom pressure plate 6; correspondingly, an external thread is provided at the lower end of the rod, and nut 13 is threadedly connected to the lower end of the rod.

[0056] Power supply 14 is used for heating the top rectangular spring shape memory alloy 4 and the bottom rectangular spring shape memory alloy 7; power supply 14 provides power to the top rectangular spring shape memory alloy 4 and the bottom rectangular spring shape memory alloy 7 respectively. Power supply 14 is essentially used for temperature control of the rectangular spring shape memory alloy.

[0057] like Figure 2 As shown, in some embodiments, annular protrusions are provided on the second end sidewall of the first vertical vibration-damping high-density metal rubber 8 and the second end sidewall of the second vertical vibration-damping high-density metal rubber 11. The edge of the annular protrusion of the first vertical vibration-damping high-density metal rubber 8 is located between the second end face of the top sealing plate 3 and the inner side of the first end of the top pressure plate 2; the edge of the annular protrusion of the second vertical vibration-damping high-density metal rubber 11 is located between the second end face of the bottom sealing plate 5 and the inner side of the first end of the bottom pressure plate 6.

[0058] In this application, the high-density metal rubber 8 for first vertical vibration damping, the low-density metal rubber 9 for first lateral vibration damping, the high-density metal rubber 11 for second vertical vibration damping, and the low-density metal rubber 12 for second lateral vibration damping are all used to achieve vibration damping and buffering for the object being damped.

[0059] In this application, the top pressure plate 2 and the top sealing plate 3 are connected and fitted together to seal the top rectangular spring shape memory alloy 4, the first vertical vibration damping high-density metal rubber 8, and the first lateral vibration damping low-density metal rubber 9 disposed inside; the bottom sealing plate 5 and the bottom pressure plate 6 are connected and fitted together to seal the bottom rectangular spring shape memory alloy 7, the second vertical vibration damping high-density metal rubber 11, and the second lateral vibration damping low-density metal rubber 12 disposed inside.

[0060] The bearing pressure plate 1 presses down the top sealing plate 3, and the bottom pressure plate 6 and the top sealing plate 3 cooperate to tightly press down the first vertical vibration damping high-density metal rubber 8 and the first lateral vibration damping low-density metal rubber 9; the nut 13 presses down the bottom sealing plate 5, and the bottom pressure plate 6 and the bottom sealing plate 5 cooperate to tightly press down the second vertical vibration damping high-density metal rubber 11 and the second lateral vibration damping low-density metal rubber 12;

[0061] The top spring shape memory alloy 4 and the bottom spring shape memory alloy 7 are connected to an external power supply 14 for temperature control of the shape memory alloy to adjust the stiffness of the top high-density metal rubber, thereby improving the longitudinal load-bearing capacity of the shock absorber.

[0062] Top pressure plate 2, top sealing plate 3, bottom pressure plate 6, and bottom sealing plate 5 are all made of high-strength aluminum material, which reduces the weight of the shock absorber while ensuring its strength.

[0063] There is a certain distance between the top pressure plate 2 and the top sealing plate 3, so that when the shock absorber is subjected to external load, the shock absorber can be subjected to longitudinal load vibration.

[0064] The high-density metal rubber 8 for first vertical vibration damping and the high-density metal rubber 11 for second vertical vibration damping can withstand large longitudinal load vibrations. The low-density metal rubber 9 for first lateral vibration damping and the low-density metal rubber 12 for second lateral vibration damping can withstand radial load vibrations. The combination of high and low density metal rubbers enables the vibration damper to achieve a three-dimensional impact damping effect.

[0065] The top rectangular spring shape memory alloy 4 and the bottom rectangular spring shape memory alloy 7 are connected to an external power supply 14. Under normal temperature conditions, the relative preload of the rectangular spring shape memory alloy is small, and the high-density metal rubber for vertical vibration damping plays the main role in bearing and damping. When the damper bearing plate 1 is subjected to a large load impact, the high-density metal rubber for vertical vibration damping is subjected to longitudinal vibration. At this time, the high temperature generated by the impact causes the shape memory alloy to deform greatly, thereby increasing the stiffness. At the same time, the stiffness of the rectangular spring shape memory alloy is further improved by actively controlling the power supply to raise the temperature, thereby achieving overload protection of the damper.

[0066] The high-density metal rubber for vertical vibration damping is designed in the molded direction, which can withstand large longitudinal load vibrations. The low-density metal rubber for lateral vibration damping is non-molded, with high stiffness but poor vibration damping effect. The composite structure of high and low density metal rubber can enable the vibration damper to achieve a three-dimensional impact-resistant vibration damping effect.

[0067] In summary, the damping performance and stiffness of the vibration damper have been greatly improved, and the damper has achieved a good vibration reduction and buffering effect. In actual use, the density of the high-density and low-density metal rubber of the vibration damper is designed according to the actual engineering requirements to achieve three-dimensional flexible vibration reduction performance.

[0068] This invention combines high- and low-density composite metal rubber with shape memory alloy for springs. It fully utilizes the excellent elasticity, high damping performance, non-volatile properties in a vacuum, resistance to corrosive environments, high and low temperature resistance, and long fatigue life of metal rubber. At the same time, it utilizes the superelastic properties of shape memory alloys that restore their original shape when external force is removed, as well as the excellent damping properties of self-adjustment due to phase change and interface movement generated during phase change. This invention is fully applicable to the field of high-precision airborne equipment in aerospace.

[0069] Traditional vibration dampers suffer from poor stability, structural characteristics that can lead to failure during long-term use, and weak impact resistance. This invention solves the problem of actively adjusting the temperature to control the shape memory alloy to restore its original shape after deformation under overload conditions.

[0070] This application can be widely used in various harsh environments, such as aerospace, shipbuilding, precision instruments and equipment, and other fields. It can be used in instruments and equipment that require vibration reduction, such as machine tools, fans, water pumps, press units, and air conditioning water pumps, to ensure that the instruments and equipment remain intact under operating conditions.

[0071] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A metal-rubber three-dimensional impact-resistant composite vibration damper based on active control, characterized in that, include: Vibration damping support frame; The vibration damping support frame includes rods, an upper mounting plate, a lower mounting plate, and a middle mounting plate. The upper mounting plate, the middle mounting plate, and the lower mounting plate are installed on the rods in sequence from top to bottom. Top pressure plate; Top sealing plate; top pressure plate is slidably fitted onto the outside of the second end of the top sealing plate; the first end of the top sealing plate is in contact with the upper end face of the upper mounting plate; Top spring shape memory alloy; The first vertical vibration damping high-density metal rubber; The first lateral vibration damping low-density metal rubber; the first lateral vibration damping low-density metal rubber is fitted on the rod, the first vertical vibration damping high-density metal rubber is fitted outside the first lateral vibration damping low-density metal rubber, the top rectangular spring shape memory alloy is fitted outside the first lateral vibration damping low-density metal rubber; the top rectangular spring shape memory alloy, the first vertical vibration damping high-density metal rubber, and the first lateral vibration damping low-density metal rubber are all placed inside the top sealing plate, the first end of the top rectangular spring shape memory alloy, the first end of the first vertical vibration damping high-density metal rubber, and the first lateral vibration damping low-density metal rubber are all in contact with the bottom inner side of the first end of the top sealing plate, and the second end of the top rectangular spring shape memory alloy, the second end of the first vertical vibration damping high-density metal rubber, and the second end of the first lateral vibration damping low-density metal rubber are all in contact with the bottom inner side of the first end of the top pressure plate; Bottom sealing plate; the top sealing plate is the same as the bottom sealing plate. Both the top sealing plate and the bottom sealing plate are formed into hollow cylinders, and a through hole is provided at the center of the first end, while the second end is open. Bottom pressure plate; the top pressure plate is the same as the bottom pressure plate, both of which are formed into hollow cylinders, with a through hole at the center of the first end and an open second end; the outer diameter of the top sealing plate and the bottom sealing plate is smaller than the inner diameter of the top pressure plate and the bottom pressure plate; the bottom pressure plate can be slidably fitted onto the outside of the second end of the bottom sealing plate; the first end of the bottom sealing plate is in contact with the lower end face of the lower mounting plate; The bottom-end rectangular spring is made of shape memory alloy. The second vertical vibration damping high-density metal rubber; The second lateral vibration damping low-density metal rubber; the first vertical vibration damping high-density metal rubber, the first lateral vibration damping low-density metal rubber, the second vertical vibration damping high-density metal rubber, and the second lateral vibration damping low-density metal rubber are all formed into cylindrical rings; the second lateral vibration damping low-density metal rubber is fitted onto the rod, the second vertical vibration damping high-density metal rubber is fitted onto the outside of the second lateral vibration damping low-density metal rubber, and the bottom end rectangular spring shape memory alloy is fitted onto the outside of the second lateral vibration damping low-density metal rubber; the bottom end rectangular spring shape memory alloy, The high-density metal rubber for second vertical vibration damping and the low-density metal rubber for second lateral vibration damping are both placed inside the bottom sealing plate. The first end of the bottom rectangular spring shape memory alloy, the first end of the high-density metal rubber for second vertical vibration damping, and the first end of the low-density metal rubber for second lateral vibration damping are all in contact with the bottom inner side of the first end of the bottom sealing plate. The second end of the bottom rectangular spring shape memory alloy, the second end of the high-density metal rubber for second vertical vibration damping, and the second end of the low-density metal rubber for second lateral vibration damping are all in contact with the bottom inner side of the first end of the bottom pressure plate. The upper fixing component is used to limit the upward displacement of the top pressure plate; the upper fixing component is installed on the upper end of the rod; the vibration isolation equipment is installed on the upper fixing component and the middle mounting plate; The lower fixing component is used to limit the downward displacement of the bottom pressure plate; the lower fixing component is installed at the lower end of the rod. Power supplies for heating the top and bottom rectangular spring shape memory alloys; power supplies are connected to the top and bottom rectangular spring shape memory alloys respectively; The upper installation disk, middle installation disk, and lower installation disk are arranged in parallel to each other.

2. The metal-rubber three-dimensional impact-resistant composite vibration damper based on active control according to claim 1, characterized in that: The upper fixing component and the middle mounting plate are both provided with multiple axial mounting holes. The vibration isolation equipment is fixed to the upper fixing component or the middle mounting plate by bolts passing through the mounting holes.

3. The metal-rubber three-dimensional impact-resistant composite vibration damper based on active control according to claim 2, characterized in that: The upper fixing component is a bearing pressure plate. The lower end of the bearing pressure plate is provided with a screw hole, and the upper end of the rod is provided with an external thread. The bearing pressure plate is threadedly connected to the upper end of the rod.

4. The metal-rubber three-dimensional impact-resistant composite vibration damper based on active control according to claim 2, characterized in that: The lower fixing component is a nut, and correspondingly, an external thread is provided at the lower end of the rod, and the nut is threadedly connected to the lower end of the rod.

5. The metal-rubber three-dimensional impact-resistant composite vibration damper based on active control according to claim 1, characterized in that: Both the second end sidewall of the first vertical vibration-damping high-density metal rubber and the second vertical vibration-damping high-density metal rubber are provided with annular protrusions. The edge of the annular protrusion of the first vertical vibration-damping high-density metal rubber is located between the second end face of the top sealing plate and the inner side of the first end of the top pressure plate; the edge of the annular protrusion of the second vertical vibration-damping high-density metal rubber is located between the second end face of the bottom sealing plate and the inner side of the first end of the bottom pressure plate.

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