A turntable damper, an energy dissipation support system and an energy dissipation and shock absorption method

Abstract

The present invention provides a rotary damper, an energy dissipation support system and an energy dissipation and shock absorption method. The rotary damper includes a first outer plate, a first disc, an intermediate plate, a second disc and a second outer plate sequentially connected by X first connecting members. The system includes the above-mentioned rotary damper. The method includes using the above-mentioned rotary damper to carry out energy dissipation and shock absorption work. By optimizing the structural design, the present invention improves the energy dissipation capacity of the damping structure; realizes multi-stage energy dissipation under complex working conditions, and solves the defect that the friction damper cannot adapt to the uncertainty of seismic loads.

Description

Technical Field

[0001] The present invention relates to the technical field of energy dissipation and seismic reduction in construction and bridge engineering, and particularly relates to a rotary damper, an energy dissipation support system and an energy dissipation and seismic reduction method. Background Art

[0002] Among numerous efforts to solve the problems of structural earthquake resistance and seismic reduction, configuring dampers is a very effective and economical approach. Among numerous dampers, a friction damper converts vibration energy into heat energy through frictional slip between components, thereby achieving the purpose of seismic reduction. It has a simple structure, stable performance, and strong energy dissipation capacity, and thus has been widely used in the field of seismic resistance of engineering structures. However, after the damper structure and friction material of a traditional friction damper are determined, its frictional force and initial sliding force cannot be changed, which also results in the inability of the traditional friction damper to adapt to the uncertainty of seismic loads and fails to achieve an ideal energy dissipation effect.

[0003] Based on the above problems, it is necessary to study a damper with better seismic reduction effect to solve the above technical problems or alleviate the influence caused by the above technical problems. Summary of the Invention

[0004] Aiming at the deficiencies existing in the prior art, the purpose of the present invention is to solve one or more of the problems existing in the above prior art. For example, one of the purposes of the present invention is to optimize the structural design and improve the energy dissipation capacity of the damping structure; the second purpose is to achieve multi-stage energy dissipation under complex working conditions and solve the defect that the friction damper cannot adapt to the uncertainty of seismic loads.

[0005] To achieve the above purpose, on the one hand, the present invention provides a rotary damper.

[0006] The rotary damper may include a first outer plate, a first disc, an intermediate plate, a second disc and a second outer plate sequentially connected by X first connectors. Among them, X circular holes distributed along the same circumference may be formed on the intermediate plate; X first oblong holes distributed along the same circumference may be formed on both the first disc and the second disc, and the X first oblong holes on each disc correspond to the X circular holes on the intermediate plate one by one, and the central axis of each circular hole is located within the corresponding first oblong hole; the first outer plate is fixedly connected to the first disc, and the second outer plate is fixedly connected to the second disc; X second oblong holes distributed along the same circumference may be formed on both the first outer plate and the second outer plate, and the X second oblong holes on each outer plate correspond to the X first oblong holes on the adjacent disc one by one, and the projection of each first oblong hole on the adjacent outer plate is located within the corresponding second oblong hole; the X first connectors sequentially pass through the second oblong holes of the first outer plate, the first oblong holes of the first disc, the circular holes of the intermediate plate, the first oblong holes of the second disc and the second oblong holes of the second outer plate, and apply a certain axial pre-tightening pressure.

[0007] Further, first central holes may be formed in both the first outer plate and the second outer plate, and the first central holes are located at the center of the circumference along which the X second oblong holes are distributed; second central holes may be formed in both the first disc and the second disc, and the second central holes are located at the center of the circumference along which the X first oblong holes are distributed; a third central hole may be formed in the intermediate plate, and the third central hole is located at the center of the circumference along which the X circular holes are distributed; the rotary damper may further include a central connecting member, and the central connecting member sequentially passes through the first central hole of the first outer plate, the second central hole of the first disc, the third central hole of the intermediate plate, the second central hole of the second disc, and the first central hole of the second outer plate for connection.

[0008] Further, the length direction of the first oblong hole of the first disc is parallel to the circumferential direction of the first disc; the length direction of the second oblong hole is the same as the length direction of the first oblong hole.

[0009] Further, the length of the second oblong hole is greater than the length of the first oblong hole; the materials of the first disc and the second disc are deformable metals.

[0010] Further, the rotary damper may further include a plurality of second connecting members and a plurality of third connecting members. A plurality of first mounting holes may be formed along the circumferential edge of the first disc on the disc surface; a plurality of second mounting holes may be formed in the first outer plate, and the second mounting holes correspond to the first mounting holes one by one; the second connecting member passes through the first mounting hole and the corresponding second mounting hole to fixedly connect the first outer plate and the first disc. A plurality of first mounting holes may be formed along the circumferential edge of the second disc on the disc surface; a plurality of second mounting holes may be formed in the second outer plate, and the second mounting holes correspond to the first mounting holes one by one; the third connecting member passes through the first mounting hole and the corresponding second mounting hole to fixedly connect the second outer plate and the second disc.

[0011] Further, the second connecting member and the third connecting member may both be countersunk bolts, and the first mounting hole may be a bolt counterbore.

[0012] Further, a first circular ring groove may be provided on the contact surface of the first outer plate facing the first disc; a first circular ring groove may also be provided on the contact surface of the second outer plate facing the second disc.

[0013] Further, second circular ring grooves may be provided on the contact surfaces of the intermediate plate facing the first disc and the second disc.

[0014] Further, a plurality of sector holes may be uniformly arranged along the circumferential direction on the first disc and the second disc.

[0015] To achieve the above object, on the other hand, the present invention provides an energy-dissipating support system.

[0016] The system may include the rotary damper as described above.

[0017] To achieve the above object, on yet another aspect, the present invention provides an energy-dissipating shock-absorbing method.

[0018] The method may include using the rotary damper as described above to perform energy-dissipating shock-absorbing work.

[0019] Compared with the prior art, the beneficial effects of the present invention may include at least one of the following:

[0020] (1) By optimizing the structural design, the present invention combines friction energy dissipation and metal energy dissipation, thus greatly improving the energy-dissipating capacity of the damping structure.

[0021] (2) The present invention realizes multi-stage energy dissipation under complex working conditions, and solves the defect that the friction damper cannot adapt to the uncertainty of seismic loads.

[0022] (3) The present invention mainly dissipates the externally input energy, reduces the external influence on the support structure, and thus improves the safety performance of the support structure.

[0023] (4) The rotary damper of the present invention has a large stiffness, high strength, high degree of prefabrication, convenient replacement, and strong energy-dissipating capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0025] Figure 1 Shows a three-dimensional structural schematic diagram of the rotary damper of the present invention;

[0026] Figure 2 Shows a structural exploded schematic diagram of the rotary damper of the present invention;

[0027] Figure 3 Shows a front view of the rotary damper of the present invention;

[0028] Figure 4 Shows a top view of the rotary damper of the present invention;

[0029] Figure 5 Shows Figure 3 the A-A cross-sectional view of

[0030] Figure 6 Shows a three-dimensional structural schematic diagram of the intermediate plate of the present invention;

[0031] Figure 7 Shows a front view of the intermediate plate of the present invention;

[0032] Figure 8 Shows Figure 7 the B-B cross-sectional view of

[0033] Figure 9 Shows a three-dimensional structural schematic diagram of the first disc / second disc of the present invention;

[0034] Figure 10 Shows a front view of the first disc / second disc of the present invention;

[0035] Figure 11 Shows Figure 10 the C-C cross-sectional view of

[0036] Figure 12 Shows a three-dimensional structural schematic diagram of the first outer plate / second outer plate of the present invention;

[0037] Figure 13 Shows a front view of the first outer plate / second outer plate of the present invention;

[0038] Figure 14 Shows Figure 13 the D-D cross-sectional view of

[0039] Figure 15 Shows a structural schematic diagram of the turntable damper of the present invention in the support system;

[0040] Figure 16 Shows the deformation diagram of the turntable damper of the present invention when working in the support system.

[0041] Main reference numerals description:

[0042] 1 - First outer plate; 2 - First disc; 3 - Intermediate plate; 4 - Second disc; 5 - Second outer plate; 6 - Central connecting member; 7 - First connecting member; 8 - First central hole; 9 - Circular hole; 10 - First oblong hole; 11 - Second oblong hole; 12 - Second connecting member; 13 - First mounting hole; 14 - Second mounting hole; 15 - First circular ring groove; 16 - Second circular ring groove; 17 - Sector hole; 18 - Third connecting member; 19 - Second central hole; 20 - Third central hole. Detailed implementation manners

[0043] The following clearly and completely describes the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention. The content not described in detail in the embodiments of the present invention belongs to the prior art well known to those of ordinary skill in the art.

[0044] It should be noted that "first", "second", "third", etc. are only for convenient description and easy distinction, and cannot be understood as indicating or implying relative importance. "Upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. are only for convenient description and to form a relative orientation or positional relationship, and do not indicate or imply that the indicated components must have the specific orientation or position.

[0045] Exemplary Embodiment 1

[0046] This exemplary embodiment provides a turntable damper. The following will be described in conjunction with Figures 1 to 14 it.

[0047] As Figures 1 to 5 shown, the turntable damper may include a first outer plate 1, a first disc 2, an intermediate plate 3, a second disc 4, and a second outer plate 5 sequentially connected by X first connectors 7.

[0048] As Figures 1 to 2 , Figures 6 to 14 shown, X circular holes 9 may be formed in the intermediate plate 3 and distributed along the same circumference; X first oblong holes 10 may be formed in both the first disc 2 and the second disc 4 and distributed along the same circumference. The X first oblong holes 10 on each disc correspond to the X circular holes 9 on the intermediate plate 3 one by one, and the central axis of each circular hole 9 is located within the corresponding first oblong hole 10; the first outer plate 1 is fixedly connected to the first disc 2, and the second outer plate 5 is fixedly connected to the second disc 4; X second oblong holes 11 may be formed in both the first outer plate 1 and the second outer plate 5 and distributed along the same circumference. The X second oblong holes 11 on each outer plate correspond to the X first oblong holes 10 on the adjacent disc one by one, and the projection of each first oblong hole 10 on the adjacent outer plate is located within the corresponding second oblong hole 11. The X first connectors 7 sequentially pass through the second oblong holes 11 of the first outer plate 1, the first oblong holes 10 of the first disc 2, the circular holes 9 of the intermediate plate 3, the first oblong holes 10 of the second disc 4, and the second oblong holes 11 of the second outer plate 5, and apply a certain axial pre-tightening pressure.

[0049] Specifically, the intermediate plate 3 can rotate within a certain angular range relative to the first disc 2 and the second disc 4. During installation and connection, the number of the circular holes 9, the first oblong holes 10, and the second oblong holes 11 are equal, their positions correspond one by one and their centers are aligned.

[0050] In this embodiment, as Figures 1 to 14 shown, first central holes 8 can be provided on both the first outer plate 1 and the second outer plate 5. The first central holes 8 are located at the center of the circumference along which X second oblong holes 11 are distributed; second central holes 19 can be provided on both the first disc 2 and the second disc 4. The second central holes 19 are located at the center of the circumference along which X first oblong holes 10 are distributed; a third central hole 20 can be provided on the intermediate plate 3. The third central hole 20 is located at the center of the circumference along which X circular holes 9 are distributed. The rotary damper can further include a central connecting member 6. The central connecting member 6 sequentially passes through the first central hole 8 of the first outer plate 1, the second central hole 19 of the first disc 2, the third central hole 20 of the intermediate plate 3, the second central hole 19 of the second disc 4, and the first central hole 8 of the second outer plate 5 for connection.

[0051] Specifically, when the rotary damper is connected, the installation of the first connecting member 7 can be coordinated by connecting the central connecting member 6 through the corresponding first central hole 8, second central hole 19, and third central hole 20. Among them, the first connecting member 7 can adopt a prestressed bolt.

[0052] In this embodiment, as Figure 2 shown, the length direction of the first oblong holes 10 on the first disc 2 can be parallel to the circumferential direction of the first disc 2, and the length direction of the first oblong holes 10 on the second disc 4 is the same as the length direction of the first oblong holes 10 on the first disc 2. The length direction of the second oblong holes 11 is the same as the length direction of the first oblong holes 10. When the intermediate plate 3 rotates relative to the first disc 2 and the second disc 4 due to an external force, the first connecting member 7 slides within the first oblong holes 10 and the second oblong holes 11.

[0053] In this embodiment, as Figure 2 shown, the length of the second oblong holes 11 is greater than the length of the first oblong holes 10. The materials of the first disc 2 and the second disc 4 are deformable metals. The first disc 2 and the second disc 4 can deform when subjected to force extrusion and can recover after the force disappears. For example, the deformable metal can be a shape memory alloy. Of course, other metals that can achieve the function of deforming and then recovering are also acceptable.

[0054] Specifically, the length of the second oblong hole 11 being greater than the length of the first oblong hole 10 enables the first connecting member 7 to cause deformation of the first disc 2 and the second disc 4 after sliding to the end of the first oblong hole 10, and the first connecting member 7 can further move a certain distance within the second oblong hole 11. Of course, it should be noted that the first outer plate 1, the middle plate 3, and the second outer plate 5 do not deform, and the material of the three can be steel or other rigid materials that do not deform.

[0055] In this embodiment, as Figure 2 shown, the rotary damper may further include a plurality of second connecting members 12 and a plurality of third connecting members 18.

[0056] A plurality of first mounting holes 13 as Figures 9 to 11 shown may be formed along the circumferential edge of the first disc 2 on the disc surface, and a plurality of second mounting holes 14 as Figure 12 and Figure 13 shown may be provided on the first outer plate 1. The second mounting holes 14 correspond to the first mounting holes 13 one by one. The number of the first mounting holes 13 and the second mounting holes 14 is the same as the number of the second connecting members 12. The second connecting members 12 pass through the first mounting holes 13 of the first disc 2 and the corresponding second mounting holes 14 of the first outer plate 1 to fixedly connect the first outer plate 1 and the first disc 2.

[0057] Furthermore, a plurality of first mounting holes 13 as Figures 9 to 11 shown may also be formed along the circumferential edge of the second disc 4 on the disc surface, and a plurality of second mounting holes 14 as Figure 12 and Figure 13 shown may be provided on the second outer plate 5. The second mounting holes 14 correspond to the first mounting holes 13 one by one. The number of the first mounting holes 13 and the second mounting holes 14 is the same as the number of the third connecting members 18. The third connecting members 18 pass through the first mounting holes 13 of the second disc 4 and the corresponding second mounting holes 14 of the second outer plate 5 to fixedly connect the second outer plate 5 and the second disc 4.

[0058] In this embodiment, as Figure 2 shown, both the second connecting members 12 and the third connecting members 18 can be countersunk bolts, and the first mounting holes 13 are bolt counterbores, so as to make the contact surfaces of the first disc 2 or the second disc 4 and the middle plate 3 flat. Of course, the present invention is not limited thereto. For example, the second connecting members 12 and the third connecting members 18 can adopt screw rods, the first mounting holes 13 can be set as threaded holes, the screw rod heads are arranged outside the first outer plate 1 or the second outer plate 5, and the screw rods pass through the second mounting holes 14 and are fixed by matching the threads of the screw rods with the threads of the first mounting holes 13 without completely passing through the first mounting holes 13.

[0059] In this embodiment, as Figure 2 、 Figures 12 to 14As shown, a first circular groove 15 may be provided on the contact surface of the first outer plate 1 facing the first disc 2; a first circular groove 15 may also be provided on the contact surface of the second outer plate 5 facing the second disc 4. Further, as Figure 2 , Figures 6 to 8 shown, second circular grooves 16 may be provided on the contact surfaces of the intermediate plate 3 facing the first disc 2 and the second disc 4.

[0060] Specifically, the first circular groove 15 and the second circular groove 16 are provided to avoid the first disc 2 or the second disc 4. One of the functions is to leave a buffer space for the deformation of the first disc 2 and the second disc 4, because out-of-plane buckling will occur when the first disc 2 and the second disc 4 are stressed and buckled; another function is to prevent friction between the positions of the first circular groove 15 and the second circular groove 16 and the first disc 2 and the second disc 4. These two functions are to reduce the resistance when the first disc 2 and the second disc 4 are deformed, so that the first disc 2 and the second disc 4 are more likely to deform. Otherwise, the first connecting member 7 may deform first.

[0061] In this embodiment, as Figure 2 , Figures 9 to 11 shown, a plurality of sector holes 17 may be uniformly provided on the first disc 2 and the second disc 4 along the circumferential direction. Corresponding to the positions of the first circular groove 15 and the second circular groove 16, corresponding sector regions will also be formed between two adjacent sector holes 17. The setting of the sector holes 17 can, on the one hand, make the first disc 2 and the second disc 4 more likely to deform, and on the other hand, make the deformation energy consumption of the first disc 2 and the second disc 4 concentrate on the perforated area, because yielding is more likely to occur in the perforated area. Of course, the present invention is not limited to this, and the sector holes 17 may also be set in other shapes.

[0062] Exemplary Embodiment 2

[0063] This exemplary embodiment provides an energy-dissipating support system, which will be described below in conjunction with Figure 15 this.

[0064] The system may include a rotary damper as in Exemplary Embodiment 1. For example, the rotary damper may be placed in the energy-dissipating support structure to form an energy-dissipating support system as Figure 15 shown. Among them, Figure 15 in which M represents the rotary damper of the present invention and N represents a common hinge.

[0065] Exemplary Embodiment 3

[0066] This exemplary embodiment provides an energy-dissipating and shock-absorbing method.

[0067] The method may include using a rotary damper as in Exemplary Embodiment 1 to perform energy-dissipating and shock-absorbing work.

[0068] To better understand the above exemplary embodiments of the present invention, the following combines Figures 1 to 16 specific examples to further illustrate the assembly method of the rotary damper and the working principle of energy dissipation and shock absorption using the rotary damper.

[0069] Example Illustration 1

[0070] The assembly method of the rotary damper may include:

[0071] Process each part component in the factory, and then assemble the rotary damper.

[0072] When assembling the rotary damper, first pass the second connecting member 12 through the first mounting hole 13 of the first disc 2 and the second mounting hole 14 of the corresponding first outer plate 1 to fixedly connect the first outer plate 1 and the first disc 2; pass the third connecting member 18 through the first mounting hole 13 of the second disc 4 and the second mounting hole 14 of the corresponding second outer plate 5 to fixedly connect the second outer plate 5 and the second disc 4.

[0073] Then, perform central positioning by passing the central connecting member 6 successively through the first central hole 8 of the first outer plate 1, the second central hole 19 of the first disc 2, the third central hole 20 of the intermediate plate 3, the second central hole 19 of the second disc 4, and the first central hole 8 of the second outer plate 5. Furthermore, assist in the connection and installation by cooperating with the first connecting member 7. Pass the first connecting member 7 successively through the second long circular hole 11 of the first outer plate 1, the first long circular hole 10 of the first disc 2, the circular hole 9 of the intermediate plate 3, the first long circular hole 10 of the second disc 4, and the second long circular hole 11 of the second outer plate 5, and apply a certain axial pre-tightening pressure.

[0074] Finally, place the rotary damper in the energy dissipation support structure to form a new energy dissipation support system.

[0075] It should be noted that during the installation and connection, it is necessary to ensure that the positions of the circular hole 9, the first long circular hole 10, and the second long circular hole 11 correspond to each other one by one and are centered.

[0076] Example Illustration 2

[0077] The working principle of the present invention for energy dissipation and shock absorption using the rotary damper may include:

[0078] During operation, that is, when the external force load is greater than the initial sliding force between the first disc 2 / second disc 4 and the intermediate plate 3, rotation occurs between the first disc 2 / second disc 4 and the intermediate plate 3, and frictional energy dissipation occurs. At this time, since the first connecting member 7 slides in the first long circular hole 10 and the second long circular hole 11, the components do not deform. In this stage, there is only frictional energy dissipation, and it only occurs between the first disc 2 / second disc 4 and the intermediate plate 3.

[0079] When the first connecting member 7 slides to the end of the first oblong hole 10 of the first disc 2 / the second disc 4, it is rotated and locked. At this time, the first connecting member 7 has not yet slid to the end of the second oblong hole 11 of the first outer plate 1 / the second outer plate 5. Therefore, the first disc 2 / the second disc 4 will undergo deformation and energy consumption next, while the intermediate plate 3 and the first outer plate 1 / the second outer plate 5 do not deform and do not consume energy. It should be noted that the first disc 2 / the second disc 4 will generate a small displacement due to deformation. Under this small displacement, there will be frictional energy consumption on the contact surfaces of the first disc 2 / the second disc 4 with the intermediate plate 3 and the first outer plate 1 / the second outer plate 5. Therefore, in this stage, there is both metal deformation energy consumption and frictional energy consumption.

[0080] The turntable damper of the present invention is placed in an energy dissipation support structure as Figure 15 shown, and the formed energy dissipation support system deforms during operation as Figure 16 shown.

[0081] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A turntable damper, characterized in that, The turntable damper includes a first outer plate, a first disc, an intermediate plate, a second disc, and a second outer plate sequentially connected by X first connectors. Among them, the intermediate plate is provided with X circular holes distributed along the same circumference; both the first disc and the second disc are provided with X first oblong holes distributed along the same circumference. The X first oblong holes on each disc correspond to the X circular holes on the intermediate plate one by one, and the central axis of each circular hole is located within the corresponding first oblong hole; the first outer plate is fixedly connected to the first disc, and the second outer plate is fixedly connected to the second disc; both the first outer plate and the second outer plate are provided with X second oblong holes distributed along the same circumference. The X second oblong holes on each outer plate correspond to the X first oblong holes on the adjacent disc one by one, and the projection of each first oblong hole on the adjacent outer plate is located within the corresponding second oblong hole; the X first connectors sequentially pass through the second oblong holes of the first outer plate, the first oblong holes of the first disc, the circular holes of the intermediate plate, the first oblong holes of the second disc, and the second oblong holes of the second outer plate, and a certain axial pre-tightening pressure is applied; the length direction of the first oblong holes on the first disc is parallel to the circumferential direction of the first disc; the length direction of the second oblong holes is the same as the length direction of the first oblong holes; the length of the second oblong holes is greater than the length of the first oblong holes; the intermediate plate can rotate relative to the first disc and the second disc within a certain angle range; the first connectors slide within the first oblong holes and the second oblong holes; the materials of the first disc and the second disc are deformable metals; the materials of the first outer plate, the intermediate plate, and the second outer plate are non-deformable rigid materials; both the first outer plate and the second outer plate are provided with first central holes, and the first central holes are located at the center of the circumference along which the X second oblong holes are distributed; both the first disc and the second disc are provided with second central holes, and the second central holes are located at the center of the circumference along which the X first oblong holes are distributed; the intermediate plate is provided with a third central hole, and the third central hole is located at the center of the circumference along which the X circular holes are distributed; the turntable damper further includes a central connector, and the central connector sequentially passes through the first central hole of the first outer plate, the second central hole of the first disc, the third central hole of the intermediate plate, the second central hole of the second disc, and the first central hole of the second outer plate for connection.

2. The turntable damper according to claim 1, wherein, The turntable damper further includes a plurality of second connectors and a plurality of third connectors; a plurality of first mounting holes are provided along the circumferential edge of the first disc on the disc surface. A plurality of second mounting holes are provided on the first outer plate, and the second mounting holes correspond to the first mounting holes one by one; the second connectors pass through the first mounting holes and the corresponding second mounting holes to fixedly connect the first outer plate and the first disc; a plurality of first mounting holes are provided along the circumferential edge of the second disc on the disc surface. A plurality of second mounting holes are provided on the second outer plate, and the second mounting holes correspond to the first mounting holes one by one; the third connectors pass through the first mounting holes and the corresponding second mounting holes to fixedly connect the second outer plate and the second disc.

3. The turntable damper according to claim 2, wherein, The second connecting member and the third connecting member are both countersunk bolts, and the first mounting hole is a bolt counterbore.

4. The turntable damper according to claim 1, wherein A first circular ring groove is provided on the contact surface of the first outer plate facing the first disc; A first circular ring groove is also provided on the contact surface of the second outer plate facing the second disc; Second circular ring grooves are provided on the contact surfaces of the intermediate plate facing the first disc and the second disc.

5. The turntable damper according to claim 1, characterized in that, A plurality of fan-shaped holes are uniformly arranged along the circumference of the first disc and the second disc.

6. An energy-dissipating bracing system, characterized in that, The system includes the rotary damper according to any one of claims 1 to 5.

7. An energy dissipation and shock absorption method, characterized in that, The method includes using the rotary damper according to any one of claims 1 to 5 to perform energy dissipation and shock absorption work.

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