A damper

Abstract

The application provides a damper and relates to the technical field of building, and aims at solving the technical problem that the damper is difficult to meet the energy absorption under extreme earthquake in the building field. The damper comprises an outer cylinder, an inner cylinder, 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 two ends of the outer cylinder, the inner cylinder is located in the outer cylinder and two ends of the inner cylinder are connected with the first base plate and the third base plate respectively; 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 accommodating damping liquid, and the piston plate is slidingly arranged in the piston cavity; the plurality of piston rods are connected with the piston plate and connected with the second base plate penetrating through the third base plate, and the second base plate is arranged on a side of the third base plate away from the first base plate. The damper can consume excess energy under a smaller stroke and meet the building requirements of energy absorption under extreme earthquake.

Description

Technical Field

[0001] This invention relates to the field of building technology, and more particularly to a damper. Background Technology

[0002] In the field of building engineering, seismic isolation technology refers to setting up a flexible isolation layer between the foundation and the superstructure to cut off the transmission path of seismic energy. By using seismic isolation bearings, the building period is extended to outside the dominant seismic period range, thereby protecting the superstructure. Due to the installation of seismic isolation bearings, the superstructure will undergo significant horizontal deformation under seismic action. Therefore, seismic isolation joints are required to prevent the building from colliding with surrounding structures or soil.

[0003] When site space is limited, building engineering often employs a combination of seismic isolation bearings and viscous dampers to reduce the horizontal deformation of the superstructure during earthquakes without compromising seismic isolation effectiveness. However, the dampers in these technologies are insufficient for energy absorption under extreme earthquake conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a damper to solve the technical problem in the construction field where dampers are unable to meet the energy absorption requirements under extreme earthquake conditions.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The present invention provides a damper, comprising an outer cylinder, an inner cylinder, 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 cylinder, wherein the inner cylinder is located inside the outer cylinder and both ends of the inner cylinder are respectively connected to the first base plate and the third base plate.

[0007] The partition plate is disposed between the inner cylinder and the outer cylinder, and a closed annular piston cavity is formed between the partition plate and the third substrate. The piston cavity is used to contain the damping fluid, and the piston plate is slidably disposed in the piston cavity.

[0008] The plurality of piston rods are connected to the piston plate and pass through the third substrate and are connected to the second substrate, wherein the second substrate is disposed on the side of the third substrate opposite to 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 segment and a second segment, the first segment being connected to the piston plate and passing through the third substrate and connected to the second substrate;

[0011] The second segment is connected to the piston plate and extends through the partition plate to the side of the partition plate facing the first substrate.

[0012] According to at least one embodiment of the present invention, the plurality of piston rods are arranged at uniform intervals along the circumference of the piston plate.

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

[0014] The piston rod can be either rod-shaped or arc-shaped.

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

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

[0017] According to at least one embodiment of the present invention, the anchor includes a fourth base plate, an ear plate and a round tube, wherein the round tube and the ear plate are both disposed on the fourth base plate, and the fourth base plate is connected to the first base plate or the second base plate.

[0018] One part of the ear plate is located inside the circular tube and connected to the inner wall of the circular tube, while the other part of the ear plate extends out of the circular tube.

[0019] According to at least one embodiment of the present invention, the anchor further includes two ribs located inside the circular tube, the two ribs being symmetrically arranged on both sides of the ear plate, one side of each rib being connected to the ear plate, and the other side being 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 includes a slider, a limiting plate, a tie rod, and a cylinder disposed inside the inner cylinder, the two ends of the cylinder being connected to the first base plate and the second base plate, respectively.

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

[0023] The slider is slidably mounted on the pull rod. One end of the pull rod passes through the third substrate and is connected to the second substrate, while 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 slider has a friction cavity for accommodating a friction assembly, the friction assembly abutting against the surface of the pull rod.

[0025] According to at least one embodiment of the present invention, the friction assembly includes a friction element, an elastomer, and a cylindrical tube disposed on the inner wall of the friction cavity, wherein the elastomer and the friction element are disposed within the cylindrical tube, and one end of the friction element opposite to the elastomer abuts against the surface of the pull rod.

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

[0027] According to at least one embodiment of the present invention, the elastic element 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] In one or more technical solutions provided in the exemplary embodiments of the present invention, at least one of the following beneficial effects can be achieved.

[0030] The damper of an exemplary embodiment of the present invention includes an outer cylinder, an inner cylinder, a second base plate, a piston plate, multiple piston rods, a partition plate, and a first base plate and a third base plate respectively encapsulated at both ends of the outer cylinder. An annular cavity is formed between the inner and outer cylinders, and an annular partition plate is disposed in the cavity, forming a piston cavity for accommodating damping fluid between the partition plate and the third base plate. The annular piston plate is slidably disposed in the damping fluid within the piston cavity, creating a viscous damping effect. The piston plate is connected to the external second base plate via multiple piston rods. When the damper is used for energy absorption in a seismic isolation structure, the relative motion between the first and second base plates dissipates energy through the motion between the piston plate and the damping fluid. Furthermore, a friction damping system is also provided in the inner cylinder. Under conditions of sufficiently large seismic energy (extreme earthquakes), this friction damping system works in conjunction with the viscous damping system to absorb excess energy. Based on this, viscous damping systems can absorb the energy of conventional earthquakes. As a velocity-type system, it does 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 small stroke, thus meeting the building requirements for energy absorption during extreme earthquakes. Attached Figure Description

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

[0032] Figure 1 This is a schematic cross-sectional view of a damper according to an embodiment of the present invention.

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

[0034] Figure 3 yes Figure 2 A schematic diagram of the AA cross-sectional structure;

[0035] Figure 4 yes Figure 2 A schematic diagram of the BB cross-sectional structure;

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

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

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

[0039] Figure 8 yes Figure 7 A schematic diagram of the EE cross-sectional structure;

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

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

[0042] Figure 11 yes Figure 10 A schematic diagram of the FF cross-sectional structure;

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

[0044] Figure label:

[0045] 11. First substrate; 12. Second substrate; 13. Third substrate; 14. Separator 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. Limiting plate; 23. Tie rod; 24. Slider; 241. Column; 242. Elastic body; 243. Friction component; 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 Implementation

[0049] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

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

[0051] Figure 3 yes Figure 2 A schematic diagram of the AA cross-sectional structure; Figure 4 yes Figure 2 A schematic diagram of the BB cross-sectional structure; Figure 5 yes Figure 2 Schematic diagram of CC cross-section structure; Figure 6 yes Figure 2 A schematic diagram of the DD cross-sectional structure. Combined with... Figures 2-6 As shown, the friction damping system in the damper specifically includes an outer cylinder 18, an inner cylinder 17, a second base plate 12, a piston plate 15, multiple piston rods 16, a partition plate 14, and a first base plate 11 and a third base plate 13 respectively encapsulated at both ends of the outer cylinder 18. The inner cylinder 17 is located inside the outer cylinder 18, and both ends of the inner cylinder 17 are connected to the first base plate 11 and the third base plate 13 respectively. The partition plate 14 is disposed 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 base plate 13. The piston cavity 181 is used to contain damping fluid, and the piston plate 15 is slidably disposed in the piston cavity 181. Multiple piston rods 16 are connected to the piston plate 15 and pass through the third base plate 13 and are connected to the second base plate 12. The second base plate 12 is disposed on the side of the third base plate 13 away from the first base plate 11.

[0052] An outer cylinder 18 and an inner cylinder 17, which are coaxial and spaced apart, are circular. The outer cylinder 18 is fitted over the inner cylinder 17, forming an annular space between them. A first substrate 11 and a 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 to the first substrate 11, and the other end is fixed to the third substrate 13. A partition plate 14 is provided in the middle of the annular space to divide the annular space into two parts. The part of the annular space located between the partition plate 14 and the third substrate 13 forms a piston cavity 181 for containing damping fluid. An annular piston plate 15 is disposed in the piston cavity 181.

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

[0054] For example, the piston rod 16 includes a first segment and a second segment. The first segment is connected to the piston plate 15 and extends through the third substrate 13 to connect with the second substrate 12. The second segment is connected to the piston plate 15 and extends through the partition plate 14 to the side of the partition plate 14 facing the first substrate 11. Thus, the piston plate 15 can move left and right in the piston chamber 181 to dissipate energy, and the second segment, through the hole in the partition plate 14, forms a limit and guide for the piston rod 16.

[0055] When the first substrate 11 and the second substrate 12 are respectively connected to the corresponding vibration isolation structure 40 and the support below the vibration isolation bearing 41, the relative movement between the first substrate 11 and the second substrate 12 can drive the piston plate 15 to move left and right in the piston chamber 181. At least one damping hole 151 for damping fluid to pass through is provided on the piston plate 15. Energy is absorbed by the viscosity effect of the damping fluid, thereby controlling the displacement between the structures connected to the first substrate 11 and the second substrate 12 to prevent it from becoming too large.

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

[0057] For example, the piston rod 16 may be shaped as either a rod or an arcuate plate.

[0058] When the piston rod 16 is in the shape of an arc plate, and there are three piston rods 16, the central angle corresponding to each piston rod 16 is 60°, such as... Figure 3 As shown, the piston rod 16 is approximately 1 / 6 the size of a cylinder, or it can be viewed as a cylinder with an arc-shaped plate cut away every 60° (corresponding to a central angle of 60°). The shape of the piston rod 16 ensures that the rigidity and strength of the entire system meet the requirements.

[0059] For example, each arc-shaped piston rod 16 is located at the radial centerline of the annular piston plate 15.

[0060] For example, see Figure 5 There are multiple damping holes 151, which can be respectively set at the piston rod 16. Two damping holes 151 form a group, and the two in each group are located on both sides of the arc-shaped piston rod 16, that is, a total of six damping holes 151. The distance between the damping holes 151 in the same group and the corresponding piston rod 16 is the same. It can be understood that the shape of the damping holes 151 is circular.

[0061] See Figure 4 and Figure 6 Both the partition plate 14 and the third substrate 13 are 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 substrate 13.

[0062] like Figure 1 As shown, the friction damping system includes a slider 24, a limiting plate 22, a pull rod 23, and a cylinder 21 disposed inside the inner cylinder 17. Both ends of the cylinder 21 are connected to the first substrate 11 and the second substrate 12, respectively. The limiting plate 22 is located near the center of the cylinder 21, and the cavity between the limiting plate 22 and the third substrate 13 forms a sliding cavity 211 for the slider 24 to slide. The slider 24 is slidably mounted on the pull rod 23. One end of the pull rod 23 passes through the third substrate 13 and connects to the second substrate 12, while the other end passes through the limiting plate 22 and extends outside the sliding cavity 211. The slider 24 has a friction cavity accommodating a friction assembly, which abuts against the surface of the pull rod 23.

[0063] Figure 7 This is a cross-sectional structural diagram of a slider according to an embodiment of the present invention; Figure 8 yes Figure 7 A schematic diagram of the EE cross-sectional structure. See also... Figures 7-8 As shown, by way of example, the friction assembly includes a friction element 243, an elastic body 242, and a cylindrical tube 241 disposed on the inner wall of the friction cavity. The elastic body 242 and the friction element 243 are disposed inside the cylindrical tube 241, and the end of the friction element 243 facing away from the elastic body 242 abuts against the surface of the pull rod 23.

[0064] In practical applications, the cylinder 21 is coaxial with the inner cylinder 17 and is located inside the inner cylinder 17. The cross-sectional shape of the cylinder 21 can be circular. A limiting plate 22 is provided in the middle of the cavity of the cylinder 21 to divide the cavity into two parts. The part of the cylinder 21 located between the limiting plate 22 and the third base plate 13 forms a sliding cavity 211 for the slider 24 to slide left and right. The initial position of the slider 24 is located in the middle of the sliding cavity 211. The sliding cavity 211 is divided into two empty strokes by the slider 24. The two empty strokes are of the same length, so that the friction damper does not play an energy dissipation role when moving left and right in the horizontal direction during normal earthquakes rather than extreme earthquakes.

[0065] When the first substrate 11 and the second substrate 12 are displaced relative to each other, the pull rod 23 will drive the slider 24 to slide left and right in the sliding cavity 211 under the action of friction, and the relative position of the pull rod 23 and the slider 24 remains unchanged.

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

[0067] Combination Figure 7 and Figure 8 As shown, through holes are provided on the limiting plate 22 and the end plate (or third base plate 13) of the cylinder 21 for the pull rod 23 to move through, providing support, guidance and limiting for the pull rod 23. A through hole communicating with the friction cavity is also provided on the slider 24 for the pull rod 23 to be inserted. The axial direction of the cylindrical column 241 on the inner wall of the friction cavity is radial to the slider 24. For example, each group of cylindrical columns 241 consists of four cylindrical columns 241 arranged circumferentially at 90° intervals. One or more disc springs are provided at the bottom of each cylindrical column 241, and friction elements 243 are provided at the opening. The friction elements 243 abut against the surface of the pull rod 23 under the elastic action of the disc springs. For example, four friction elements 243 abut against the pull rod 23 from the top, bottom, left and right directions respectively to form a friction pair. The shape of the friction elements 243 matches the surface shape of the pull rod 23, and the pull rod 23 can be circular or rectangular in cross-section.

[0068] For example, depending on the actual damping force requirements, multiple sets of cylindrical tubes 241 can be arranged inside the friction cavity, with each set of cylindrical tubes 241 distributed along the axial direction of the tie rod 23. For instance, two sets of cylindrical tubes 241 (two sets of friction components) are distributed along the axial direction of the tie rod 23, and four friction components of the same set are arranged circumferentially along the tie rod 23. It is understood that the shape of the cylindrical tubes 241 matches the outer circumferential surface of the disc spring, for example, both are circular.

[0069] For example, the column 241 and the friction member 243 are respectively provided with corresponding pin holes. When the friction member 243 is set inside the column 241 against the elastic force of the disc spring, the pin 244 is used to fix the friction member 243 inside the column 241. At this time, the pull rod 23 can be easily passed through the slider 24, and then the pin 244 can be pulled out. The friction member 243 abuts against 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 protruding threaded post is provided on the first substrate 11, and a threaded hole is provided on the end plate of the cylinder 21, allowing the cylinder 21 to be detachably mounted on the first substrate 11. Simultaneously, a through hole for the cylinder 21 to pass through is provided on the third substrate 13, and the end plate of the cylinder 21 near the third substrate 13 is disposed in the through hole of the third substrate 13. The end plate of the cylinder 21 near the third substrate 13 and the surface of the third substrate 13 facing the first substrate 11 can be flush. By screwing the cylinder 21 to the first substrate 11, assembly and maintenance are more convenient.

[0071] Figure 9 This is a schematic cross-sectional view of a damper according to another embodiment of the present invention; Figure 10 This is a cross-sectional structural diagram of an anchor according to an embodiment of the present invention; Figure 11 yes Figure 10 A schematic diagram of the FF cross-sectional structure; Figure 12 This is a schematic diagram of a seismic isolation structure according to an embodiment of the present invention. See also... Figures 9-12 In an exemplary embodiment of the present invention, anchors 30 are provided at both ends of the damper, that is, on the outer sides of the first base plate 11 and the second base plate 12. The anchors 30 are connected to the support pier below the seismic isolation support 41 and the lower hanging plate wall on the seismic isolation structure 40 on the seismic isolation support 41 by means of pins, which can minimize the horizontal displacement of the seismic isolation structure 40.

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

[0073] The anchor 30 also 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 of each rib 33 is connected to the ear plate 31, and the other side is connected to the inner wall of the circular tube 32.

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

[0075] The ear plate 31 is provided with a pin hole so that the damper can be conveniently installed in the corresponding part of the vibration isolation structure 40 by means of a pin. The vibration isolation structure 40 is provided with an ear plate 31 with a pin hole in the corresponding part. The ear plate 31 of the anchor 30 and the ear plate 31 of the vibration isolation structure 40 are connected by a pin.

[0076] In practical applications, the circular tube 32 and ear plate 31 of the anchor 30 are both welded to the fourth base plate 34. The upper and lower edges of the ear plate 31 are welded inside the circular tube 32. Simultaneously, the strength and rigidity of the anchor 30 are enhanced by using a rib plate 33 on each side of the ear plate 31. The two rib plates 33 and the ear plate 31 are roughly fixed in a cross shape within the circular tube 32. Figure 11 As shown, the two sides of the rib plate 33 are welded to the inner walls of the ear plate 31 and the circular tube 32, respectively. The portion of the ear plate 31 with pin holes is located outside the circular tube 32 so as to connect with the ear plate 31 on the vibration isolation structure 40.

[0077] For example, four sector-shaped plates are provided at the opening of the end of the circular tube 32 away from the fourth substrate 34 to seal the interior of the circular tube 32 into a sealed structure. The two right-angled sides of each sector-shaped plate are welded to the ear plate 31 and the rib plate 33, respectively, and the arc-shaped side is welded to the inner wall of the circular tube 32. This sealed internal structure of the circular tube 32 can prevent moisture from entering, giving the internal components of the circular tube 32 a certain degree of corrosion resistance.

[0078] The damper provided in the exemplary embodiment of the present invention, under normal seismic action, drives the piston plate 15 to reciprocate within the piston chamber 181 via the piston rod 16, squeezing the damping fluid (silicone oil, mineral oil, polyalphaolefin, etc.) in the piston chamber 181 to generate damping force through the damping hole 151 to dissipate energy. At this time, the slider 24 of the friction damping system slides freely in the sliding chamber 211 through the empty stroke, and no relative movement occurs between the slider 24 and the pull rod 23. That is, the slider 24 and the pull rod 23 reciprocate synchronously in the empty stroke of the sliding chamber 211, without generating energy dissipation, and without affecting the stiffness of the overall seismic isolation system (including the seismic isolation structure, seismic isolation bearing and seismic isolation pier).

[0079] Furthermore, when an extreme earthquake with greater energy occurs, the horizontal deformation of the isolation structure 40 exceeds the idle stroke of the slider 24 in the sliding cavity 211. The slider 24 collides with the limiting plate 22 or the end plate of the cylinder 21. At this time, the slider 24 and the tie rod 23 generate relative motion, and friction energy is dissipated between the friction element 243 and the tie rod 23. Based on this, the friction damping system and the viscous damping system work together to dissipate energy, which can consume earthquake energy with a small stroke, thereby ensuring that the isolation structure 40 does not collide with the surrounding structure or soil.

[0080] As can be seen from the above, in the damper provided by the exemplary embodiment of the present invention, only the viscous damping system plays a role during a conventional earthquake, 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] Those skilled in the art should understand that the above embodiments are merely for illustrating the present invention and are not intended to limit the scope of the invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A damper, characterized in that, It includes an outer cylinder, an inner cylinder, a second substrate, a piston plate, multiple piston rods, a partition plate, and a first substrate and a third substrate respectively encapsulated at both ends of the outer cylinder. The inner cylinder is located inside the outer cylinder and its two ends are respectively connected to the first substrate and the third substrate. The partition plate is disposed between the inner cylinder and the outer cylinder, and a closed annular piston cavity is formed between the partition plate and the third substrate. The piston cavity is used to contain the damping fluid, and the piston plate is slidably disposed in the piston cavity. The plurality of piston rods are connected to the piston plate and pass through the third substrate and are connected to the second substrate, wherein the second substrate is disposed on the side of the third substrate opposite to the first substrate; The damper also includes a slider, a limiting plate, a tie rod, and a cylinder disposed inside the inner cylinder, with both ends of the cylinder connected to the first base plate and the second base plate, respectively. The limiting plate is located near the middle of the cylinder, and the cavity between the limiting plate and the third base plate of the cylinder forms a sliding cavity for the slider to slide. The slider is slidably mounted on the pull rod. One end of the pull rod passes through the third substrate and is connected to the second substrate, while the other end passes through the limiting plate and extends to the outside of the sliding cavity. The slider has a friction cavity for accommodating a friction assembly, which abuts against the surface of the pull rod. The friction assembly includes a friction element, an elastomer, and a cylindrical tube disposed on the inner wall of the friction cavity. The elastomer and the friction element are disposed inside the cylindrical tube, and the end of the friction element facing away from the elastomer abuts against the surface of the pull rod.

2. The damper according to claim 1, characterized in that, The piston plate has 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 being connected to the piston plate and passing through the third substrate and connected to the second substrate; The second segment is connected to the piston plate and extends through the partition plate to the side of the partition plate facing the first substrate.

4. The damper according to claim 1, characterized in that, The plurality of piston rods are arranged at uniform intervals 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 circular.

6. The damper according to claim 1, characterized in that, The piston rod can be either rod-shaped or arc-shaped.

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

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

9. The damper according to any one of claims 1-6, characterized in that, The damper also includes two anchors.

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

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