Damper

Abstract

The invention provides a damper, relates to the technical field of buildings, and aims to solve the technical problem that a damper in the field of buildings is difficult to meet energy absorption under extreme earthquake conditions. The damper comprises an outer cylinder, an inner cylinder, a second base plate, a piston plate, a plurality of piston rods, a partition plate, a first base plate and a third base plate, wherein the first base plate and the third base plate are packaged at the two ends of the outer cylinder correspondingly; the inner cylinder is located in the outer cylinder, and the two ends of the inner cylinder are connected with the first base plate and the third base plate correspondingly; the partition plate is arranged between the inner cylinder and the outer cylinder, a closed annular piston cavity is formed between the partition plate and the third base plate, the piston cavity is used for containing damping liquid, and the piston plate is arranged in the piston cavity in a sliding mode; the multiple piston rods are connected with the piston plate and penetrate through the third base plate to be connected with the second base plate, and the second base plate is arranged on the side, away from the first base plate, of the third base plate. The damper can consume excess energy in a small stroke, and the building requirement for energy absorption during extreme earthquakes is met.

Description

Technical Field

[0001] The present invention relates to the field of building technology, in particular to a damper. Background Art

[0002] In the construction industry, seismic isolation technology involves installing a flexible isolation layer between the foundation and the superstructure to cut off the transmission path of seismic energy. Using isolation bearings and other techniques, the building's lifespan is extended beyond the dominant seismic period, thereby protecting the superstructure. Due to the installation of isolation bearings, the superstructure will experience significant horizontal deformation during earthquakes, necessitating the installation of isolation joints to prevent collisions between the building and surrounding structures or the soil.

[0003] When project sites are limited, a combination of seismic isolation bearings and viscous dampers is often used in construction projects to reduce the horizontal deformation of the superstructure during earthquakes without compromising the isolation effect. However, conventional dampers are unable to absorb the energy required in extreme earthquakes. Summary of the Invention

[0004] The object of the present invention is to provide a damper to solve the technical problem in the field of construction that dampers are difficult to meet the energy absorption requirements under extreme earthquake conditions.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a damper, comprising an outer tube, an inner tube, a second base plate, a piston plate, a plurality of piston rods, a partition plate, and a first base plate and a third base plate respectively encapsulated at both ends of the outer tube, wherein the inner tube is located within the outer tube and the two ends of the inner tube are respectively connected to the first base plate and the third base plate;

[0007] The partition plate is provided between the inner cylinder and the outer cylinder, and a sealed annular piston cavity is formed between the partition plate and the third base plate. The piston cavity is used to accommodate damping fluid, and the piston plate is slidably provided in the piston cavity.

[0008] The plurality of piston rods are connected to the piston plate and pass through the third substrate to be connected to the second substrate. The second substrate is arranged on a side of the third substrate away from the first substrate.

[0009] According to at least one embodiment of the present invention, at least one damping hole is provided on the piston plate for the damping fluid to pass through.

[0010] According to at least one embodiment of the present invention, the piston rod includes a first section and a second section, the first section is connected to the piston plate, and passes through the third base plate and is connected to the second base plate;

[0011] The second section is connected to the piston plate and passes through the partition plate and extends to a side of the partition plate facing the first base plate.

[0012] According to at least one embodiment of the present invention, the plurality of piston rods are evenly spaced apart along the circumference of the piston plate.

[0013] According to at least one embodiment of the present invention, the outer cylinder and the cross-section of the outer cylinder are circular in shape;

[0014] The shape of the piston rod includes one of a rod shape and an arc-shaped plate shape.

[0015] According to at least one embodiment of the present invention, the piston rod is in the shape of an arc plate, there are three piston rods, and the central angle corresponding to each piston rod is 60°.

[0016] According to at least one embodiment of the present invention, the damper further includes two anchors, and the two anchors are respectively provided on the first substrate and the second substrate.

[0017] According to at least one embodiment of the present invention, the anchoring member includes a fourth substrate, an ear plate, and a circular tube, wherein the circular tube and the ear plate are both provided on the fourth substrate, and the fourth substrate is connected to the first substrate or the second substrate;

[0018] A portion of the ear plate is located in the circular tube and connected to the inner wall of the circular tube, and another portion of the ear plate extends out of the circular tube.

[0019] According to at least one embodiment of the present invention, the anchor also includes two ribs located inside the circular tube, and the two ribs are symmetrically arranged on both sides of the ear plate, one side of each rib is connected to the ear plate, and the other side is connected to the inner wall of the circular tube.

[0020] According to at least one embodiment of the present invention, the fourth substrate is a flange.

[0021] According to at least one embodiment of the present invention, the damper further comprises a slider, a limit plate, a pull rod, and a cylinder disposed inside the inner cylinder, wherein both ends of the cylinder are connected to the first base plate and the second base plate respectively;

[0022] The limiting plate is arranged near the middle of the cylinder, and the cavity between the limiting plate of the cylinder and the third base plate forms a sliding cavity for the slider to slide;

[0023] The sliding block is slidably disposed on the pull rod. One end of the pull rod passes through the third base plate and is connected to the second base plate, and the other end passes through the limiting plate and extends to the outside of the sliding cavity.

[0024] According to at least one embodiment of the present invention, the sliding block has a friction cavity for accommodating a friction component, and the friction component abuts against the surface of the pull rod.

[0025] According to at least one embodiment of the present invention, the friction assembly includes a friction member, an elastomer, and a cylindrical tube arranged on the inner wall of the friction chamber, the elastomer and the friction member are arranged in the cylindrical tube, and one end of the friction member facing away from the elastomer is stopped on the surface of the pull rod.

[0026] According to at least one embodiment of the present invention, there are multiple friction assemblies, and the multiple friction assemblies are evenly arranged along the circumference of the pull rod.

[0027] According to at least one embodiment of the present invention, the elastic member includes a disc spring.

[0028] According to at least one embodiment of the present invention, the cylinder is screwed to the first base plate.

[0029] One or more technical solutions provided in the exemplary embodiments of the present invention can achieve at least one of the following beneficial effects.

[0030] The damper of an exemplary embodiment of the present invention includes an outer tube, an inner tube, a second substrate, a piston plate, a plurality of piston rods, a partition plate, and a first substrate and a third substrate respectively encapsulated at both ends of the outer tube. An annular cavity is formed between the inner tube and the outer tube, and an annular partition plate is arranged in the cavity so that a piston chamber for containing damping fluid is formed between the partition plate and the third substrate. The annular piston plate slides in the damping fluid in the piston chamber to form a viscous damping effect, and the piston plate is connected to the external second substrate through a plurality of piston rods. When the damper is used to absorb energy of a seismic isolation structure, the energy of the relative movement between the first substrate and the second substrate is dissipated by the movement between the piston plate and the damping fluid. Furthermore, a friction damping system is also provided in the inner tube. When the earthquake energy is large enough (extreme earthquake), the friction damping system and the viscous damping system work together to absorb excess energy. Based on this, the viscous damping system can absorb the energy of conventional earthquakes. It is velocity-type and will not affect the stiffness of the seismic isolation system. In extreme earthquakes, the friction damping system and the viscous damping system work together to consume excess energy with a smaller stroke, thereby meeting the building requirements for energy absorption during extreme earthquakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0032] Figure 1 is a schematic cross-sectional structural diagram of a damper according to an embodiment of the present invention;

[0033] Figure 2 is a schematic cross-sectional structural diagram of a viscous damping system according to an embodiment of the present invention;

[0034] Figure 3 yes Figure 2 AA cross-sectional structural diagram;

[0035] Figure 4 yes Figure 2 BB cross-sectional structure diagram;

[0036] Figure 5 yes Figure 2 Schematic diagram of CC cross-section structure;

[0037] Figure 6 yes Figure 2 DD cross-sectional structure diagram;

[0038] Figure 7 is a schematic cross-sectional structural diagram of a slider according to an embodiment of the present invention;

[0039] Figure 8 yes Figure 7 Schematic diagram of EE cross-section structure;

[0040] Figure 9 is a schematic cross-sectional structural diagram of a damper according to another embodiment of the present invention;

[0041] Figure 10 is a schematic cross-sectional structural diagram of an anchor according to an embodiment of the present invention;

[0042] Figure 11 yes Figure 10 FF cross-sectional structure diagram;

[0043] Figure 12 is a schematic diagram of a seismic isolation structure according to an embodiment of the present invention.

[0044] Reference numerals:

[0045] 11. First substrate; 12. Second substrate; 13. Third substrate; 14. Partition plate; 15. Piston plate; 151. Damping hole; 16. Piston rod; 17. Inner cylinder; 18. Outer cylinder; 181. Piston chamber;

[0046] 21. Cylinder; 211. Sliding cavity; 22. Stop plate; 23. Pull rod; 24. Slider; 241. Cylinder; 242. Elastic body; 243. Friction member; 244. Pin;

[0047] 30. Anchor; 31. Ear plate; 32. Round tube; 33. Rib plate; 34. Fourth base plate;

[0048] 40. Seismic isolation structure; 41. Seismic isolation bearing. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0050] Figure 1 FIG is a schematic cross-sectional view of a damper according to an embodiment of the present invention. Figure 1 As shown, the damper provided by the exemplary embodiment of the present invention includes two energy dissipation systems: a viscous damping system and a friction damping system, wherein the viscous damping system is as shown in FIG. Figure 2 As shown, Figure 2 3 is a schematic cross-sectional structural diagram of a viscous damping system according to an embodiment of the present invention.

[0051] Figure 3 yes Figure 2 AA cross-sectional structural diagram; Figure 4 yes Figure 2 BB cross-sectional structure diagram; Figure 5 yes Figure 2 Schematic diagram of CC cross-section structure; Figure 6 yes Figure 2 DD cross-sectional structure diagram. Figure 2-Figure 6 As shown, the friction damping system in the damper specifically includes an outer cylinder 18, an inner cylinder 17, a second substrate 12, a piston plate 15, a plurality of piston rods 16, a partition plate 14, and a first substrate 11 and a third substrate 13 respectively encapsulated at both ends of the outer cylinder 18. The inner cylinder 17 is located in the outer cylinder 18, and the two ends of the inner cylinder 17 are respectively connected to the first substrate 11 and the third substrate 13; the partition plate 14 is arranged between the inner cylinder 17 and the outer cylinder 18, and a closed annular piston cavity 181 is formed between the partition plate 14 and the third substrate 13. The piston cavity 181 is used to accommodate damping fluid, and the piston plate 15 is slidably arranged in the piston cavity 181; a plurality of piston rods 16 are connected to the piston plate 15, and pass through the third substrate 13 to be connected to the second substrate 12. The second substrate 12 is arranged on the side of the third substrate 13 away from the first substrate 11.

[0052] The outer cylinder 18 and the inner cylinder 17 are coaxial, spaced apart, and circular. The outer cylinder 18 is sleeved on the outside of the inner cylinder 17 to form an annular space between the two, wherein the first substrate 11 and the third substrate 13 are respectively sealed at both ends of the annular space, that is, one end of the outer cylinder 18 and the inner cylinder 17 are fixed on the first substrate 11, and the other end is fixed on the third substrate 13, and a partition plate 14 is provided at the middle position of the annular space to divide the annular space into two parts; wherein, the part of the annular space located between the partition plate 14 and the third substrate 13 forms a piston chamber 181 for accommodating the damping fluid, and the annular piston plate 15 is provided in the piston chamber 181.

[0053] The piston plate 15 is connected to the second base plate 12 via a plurality of piston rods 16 . The piston rods 16 pass through the third base plate 13 and are connected to the piston plate 15 .

[0054] Illustratively, piston rod 16 includes a first section and a second section. The first section is connected to piston plate 15 and extends through third base plate 13 to connect to second base plate 12. The second section is connected to piston plate 15 and extends through partition plate 14 to the side of partition plate 14 facing first base plate 11. This allows piston plate 15 to move left and right within piston chamber 181 to dissipate energy. The second section extends through the hole in partition plate 14, limiting and guiding piston rod 16.

[0055] When the first and second base plates 11, 12 are connected to the corresponding isolation structures 40 and the buttresses below the isolation supports 41, respectively, the relative movement between the first and second base plates 11, 12 can drive the piston plate 15 to move left and right within the piston chamber 181. The piston plate 15 is provided with at least one damping hole 151 for the passage of damping fluid. The damping fluid's viscous effect absorbs energy, thereby limiting excessive displacement between the structures connected to the first and second base plates 11, 12.

[0056] In some embodiments, there are multiple piston rods 16 , which are evenly spaced apart along the circumference of the piston plate 15 , that is, evenly spaced apart along the circumference of the second base plate 12 .

[0057] Exemplarily, the shape of the piston rod 16 includes one of a rod shape and an arc-shaped plate shape.

[0058] When the shape of the piston rod 16 is an arc plate, there are three piston rods 16, and the central angle of each piston rod 16 is 60 degrees. Figure 3 As shown, the shape of the piston rod 16 is approximately 1 / 6 of a cylinder, which can also be regarded as a cylinder with an arc plate removed every 60° (corresponding to a central angle of 60°). The shape of the piston rod 16 can ensure that the rigidity and strength of the entire system meet the requirements.

[0059] Exemplarily, each arc-shaped plate-shaped piston rod 16 is located at the radial center line of the annular piston plate 15 .

[0060] For example, see Figure 5 There are multiple damping holes 151, each of which can be provided on the piston rod 16. Two damping holes 151 form a group, with two in each group located on either side of the arc-shaped plate-shaped piston rod 16, for a total of six damping holes 151. The distances between the damping holes 151 in the same group and the corresponding piston rod 16 are the same. It is understood that the damping holes 151 are circular in shape.

[0061] See also Figure 4 and Figure 6 The partition plate 14 and the third base plate 13 are both provided with holes for the piston rod 16 to pass through. The shape of the holes is adapted to the shape of the piston rod 16 so that the piston rod 16 can move freely on the partition plate 14 and the third base plate 13.

[0062] like Figure 1 As shown, the friction damping system includes a slider 24, a limit plate 22, a pull rod 23, and a cylinder 21 disposed within the inner tube 17. The cylinder 21 has two ends connected to the first base plate 11 and the second base plate 12, respectively. The limit plate 22 is disposed near the center of the cylinder 21. The cavity between the limit plate 22 and the third base plate 13 of the cylinder 21 forms a sliding cavity 211 for the slider 24 to slide. The slider 24 is slidably disposed on the pull rod 23. One end of the pull rod 23 passes through the third base plate 13 and is connected to the second base plate 12, while the other end passes through the limit plate 22 and extends out of the sliding cavity 211. The slider 24 has a friction cavity for accommodating a friction component, which abuts against the surface of the pull rod 23.

[0063] Figure 7 is a schematic cross-sectional structural diagram of a slider according to an embodiment of the present invention; Figure 8 yes Figure 7 EE cross-sectional structure diagram. Figure 7-Figure 8 As shown, exemplarily, the friction assembly includes a friction member 243, an elastomer 242 and a cylinder 241 arranged on the inner wall of the friction chamber. The elastomer 242 and the friction member 243 are arranged in the cylinder 241, and the end of the friction member 243 facing away from the elastomer 242 stops on the surface of the pull rod 23.

[0064] In practice, cylinder 21 is coaxial with inner cylinder 17 and located within inner cylinder 17. The cross-section of cylinder 21 can be circular. A limit plate 22 is positioned in the middle of the cylinder 21 cavity, dividing it into two sections. The portion of cylinder 21 between limit plate 22 and third base plate 13 forms a sliding cavity 211 for the left and right sliding of slider 24. Slider 24's initial position is in the middle of cavity 211, which is divided by slider 24 into two idle strokes of equal length. Therefore, during conventional earthquakes, rather than extreme earthquakes, the friction damper does not dissipate energy during left and right horizontal movement.

[0065] When the first substrate 11 and the second substrate 12 are relatively displaced, the pull rod 23 drives the slider 24 to slide left and right in the sliding cavity 211 under the action of friction, and the relative positions of the pull rod 23 and the slider 24 remain unchanged.

[0066] When the relative displacement between the first substrate 11 and the second plate is greater than the idle stroke, the slider 24 stops on the end plate of the cylinder 21 or the limit plate 22, and the relative position of the pull rod 23 and the slider 24 changes. At this time, the pull rod 23 and the friction part 243 abutting on the pull rod 23 generate friction to dissipate energy.

[0067] Combine Figure 7 and Figure 8 As shown, through holes are provided on the limit plate 22 and the end plate (or third base plate 13) of the cylinder 21 for the pull rod 23 to pass through, providing support, guidance and limitation for the pull rod 23. A through hole is also provided on the slider 24, which is connected to the friction chamber, for the pull rod 23 to be inserted into. The axial direction of the cylinder 241 on the inner wall of the friction chamber is the radial direction of the slider 24. For example, each group of cylinders 241 is composed of four cylinders 241 arranged circumferentially at intervals of 90°. One or more disc springs are provided at the bottom of each cylinder 241, and a friction member 243 is provided at the opening. The friction member 243 is abutted against the surface of the pull rod 23 under the elastic action of the disc spring. For example, the four friction members 243 abut against the pull rod 23 in the four directions of up, down, left and right, respectively, to form a friction pair. The shape of the friction member 243 matches the surface shape of the pull rod 23, and the pull rod 23 can have a circular or rectangular cross section.

[0068] For example, based on actual damping force requirements, multiple groups of cylinders 241 can be disposed within the friction chamber, with each group of cylinders 241 distributed axially along the pull rod 23. For example, two groups of cylinders 241 (two friction assemblies) can be distributed axially along the pull rod 23, with the four friction assemblies in the same group arranged circumferentially along the pull rod 23. It will be appreciated that the shape of the cylinders 241 matches the outer circumference of the disc spring, and both are, for example, circular.

[0069] For example, corresponding pin holes are provided on the cylinder 241 and the friction member 243 respectively. When the friction member 243 overcomes the elastic force of the disc spring and is set inside the cylinder 241, the friction member 243 is fixed in the cylinder 241 using the pin 244. At this time, the pull rod 23 can be conveniently passed through the slider 24, and then the pin 244 can be pulled out. The friction member 243 stops on the surface of the pull rod 23 under the elastic force of the disc spring to form a friction pair.

[0070] In some embodiments, a raised threaded post is provided on the first substrate 11, and a screw hole is provided on the end plate of the cylinder 21, allowing the cylinder 21 to be removably mounted on the first substrate 11. Furthermore, a through hole is provided on the third substrate 13 for the cylinder 21 to pass through. The end plate of the cylinder 21 adjacent to the third substrate 13 is positioned within the through hole of the third substrate 13. The end plate of the cylinder 21 adjacent to the third substrate 13 and the surface of the third substrate 13 facing the first substrate 11 can be flush. Screwing the cylinder 21 to the first substrate 11 facilitates assembly and maintenance.

[0071] Figure 9 is a schematic cross-sectional structural diagram of a damper according to another embodiment of the present invention; Figure 10 is a schematic cross-sectional structural diagram of an anchor according to an embodiment of the present invention; Figure 11 yes Figure 10 FF cross-sectional structure diagram; Figure 12 Schematic diagram of a seismic isolation structure according to an embodiment of the present invention. Figures 9-12 In the exemplary embodiment of the present invention, anchors 30 are provided at both ends of the damper, that is, on the outside of the first substrate 11 and the second substrate 12. The anchors 30 are connected to the pier below the isolation support 41 and the lower hanging wall on the isolation structure 40 on the isolation support 41 by a pin shaft, so that the horizontal displacement of the isolation structure 40 can be minimized.

[0072] Specifically, the anchor 30 includes a fourth substrate 34, an ear plate 31 and a circular tube 32. The circular tube 32 and the ear plate 31 are both arranged on the fourth substrate 34, and the fourth substrate 34 is connected to the first substrate 11 or the second substrate 12; a part of the ear plate 31 is located in the circular tube 32 and is connected to the inner wall of the circular tube 32, and the other part of the ear plate 31 extends out of the circular tube 32.

[0073] The anchor 30 further includes two ribs 33 located inside the circular tube 32 . The two ribs 33 are symmetrically arranged on both sides of the ear plate 31 . One side surface of each rib 33 is connected to the ear plate 31 , and the other side surface is connected to the inner wall of the circular tube 32 .

[0074] For example, the fourth base plate 34 is a flange. The first base plate 11 and the second base plate 12 are also flanges. The fourth base plate 34 of the anchor 30 can be detachably connected by bolts between the flanges, which is convenient for maintenance and installation.

[0075] Pin holes are provided on the ear plate 31 to facilitate installation of the damper at the corresponding position of the isolation structure 40 through a pin shaft at the corresponding position to be connected. The isolation structure 40 is provided with an ear plate 31 with a pin hole at the corresponding position, and the ear plate 31 of the anchor 30 and the ear plate 31 of the isolation structure 40 are connected through a pin shaft.

[0076] In practical applications, the circular tube 32 and the ear plate 31 in the anchor 30 are welded to the fourth base plate 34, and the upper and lower edges of the ear plate 31 are welded in the circular tube 32. At the same time, a rib 33 is used on both sides of the ear plate 31 to enhance the strength and rigidity of the anchor 30. The two ribs 33 and the ear plate 31 are fixed in the circular tube 32 in a roughly cross shape. Figure 11 As shown, both sides of the rib 33 are welded to the inner wall of the ear plate 31 and the circular tube 32. The portion of the ear plate 31 with the pin hole is arranged outside the circular tube 32 so as to be connected to the ear plate 31 on the seismic isolation structure 40.

[0077] For example, four fan-shaped plates are provided at the opening of the end of the circular tube 32 facing away from the fourth base plate 34, sealing the interior of the circular tube 32 into a sealed structure. The two right-angled sides of each fan-shaped plate are welded to the ear plate 31 and the rib plate 33, respectively, and the arc side is welded to the inner wall of the circular tube 32. This sealed internal structure of the circular tube 32 prevents moisture from entering, making the components inside the circular tube 32 somewhat corrosion-resistant.

[0078] The damper provided by the exemplary embodiment of the present invention, under the action of a conventional earthquake, drives the piston plate 15 to reciprocate in the piston chamber 181 through the piston rod 16, and squeezes the damping liquid (silicone oil, mineral oil, polyα-olefin, etc.) in the piston chamber 181 through the damping hole 151 to generate a damping force for energy consumption. At this time, the slider 24 of the friction damping system slides freely in the sliding chamber 211 through the idle stroke, and there is no relative movement between the slider 24 and the pull rod 23, that is, the slider 24 and the pull rod 23 reciprocate synchronously in the idle stroke of the sliding chamber 211, without generating energy consumption and without affecting the stiffness of the overall seismic isolation system (including the seismic isolation structure, seismic isolation support and seismic isolation pier).

[0079] Furthermore, when an extreme earthquake with even greater energy occurs, the horizontal deformation of the seismic isolation structure 40 exceeds the idle travel of the slider 24 in the sliding cavity 211, causing the slider 24 to collide with the limit plate 22 or the end plate of the cylinder 21. At this point, the slider 24 and the pull rod 23 move relative to each other, generating frictional energy dissipation between the friction member 243 and the pull rod 23. Based on this, the friction damping system and the viscous damping system work together to dissipate seismic energy with a relatively small travel, thereby ensuring that the seismic isolation structure 40 does not collide with surrounding structures or soil.

[0080] From the above, it can be seen that in the damper provided by the exemplary embodiment of the present invention, during a conventional earthquake, only the viscous damping system plays a role in providing damping force for the seismic isolation system. Since the viscous damping system is velocity-type, it will not affect the stiffness of the seismic isolation system; the viscous damping system and the friction damping system are nested, and the seismic isolation system does not need to set up separate anchors for the friction damping system, which can save space, meet the width requirements of the seismic isolation joint, and reduce costs.

[0081] It should be understood by those skilled in the art that the above embodiments are merely for the purpose of illustrating the present invention clearly, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and such changes or modifications are still within the scope of the present invention.

Claims

1. A damper, characterized in that: The device comprises an outer tube, an inner tube, a second base plate, a piston plate, a plurality of piston rods, a partition plate, and a first base plate and a third base plate respectively encapsulated at both ends of the outer tube, wherein the inner tube is located inside the outer tube and the two ends of the inner tube are respectively connected to the first base plate and the third base plate; The partition plate is provided between the inner cylinder and the outer cylinder, and a sealed annular piston cavity is formed between the partition plate and the third base plate. The piston cavity is used to accommodate damping fluid, and the piston plate is slidably provided in the piston cavity. The plurality of piston rods are connected to the piston plate and pass through the third substrate to be connected to the second substrate. The second substrate is arranged on a side of the third substrate away from the first substrate.

2. The damper according to claim 1, characterized in that The piston plate is provided with at least one damping hole for the damping fluid to pass through.

3. The damper according to claim 1, characterized in that The piston rod includes a first section and a second section, the first section is connected to the piston plate, and passes through the third base plate and is connected to the second base plate; The second section is connected to the piston plate and passes through the partition plate and extends to a side of the partition plate facing the first base plate.

4. The damper according to claim 1, characterized in that The plurality of piston rods are evenly spaced and arranged along the circumference of the piston plate.

5. The damper according to claim 1, characterized in that The outer cylinder and the cross section of the outer cylinder are in a circular shape.

6. The damper according to claim 1, characterized in that The shape of the piston rod includes one of a rod shape and an arc-shaped plate shape.

7. The damper according to claim 5, characterized in that The shape of the piston rod is an arc plate.

8. The damper according to claim 7, characterized in that There are three piston rods, and the central angle corresponding to each piston rod is 60°.

9. The damper according to any one of claims 1 to 6, characterized in that: The damper further comprises two anchors.

10. The damper according to claim 9, characterized in that The two anchors are respectively provided on the first substrate and the second substrate.

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