Self-resetting decoupling impact type fractional friction damper

Abstract

This invention relates to a self-resetting, stratified friction damper with separation and impact, comprising a housing. A first friction system is disposed within the housing, contacting and slidingly connecting with the top and bottom walls of the housing. Second friction systems are disposed on both sides, contacting the top and bottom walls of the housing and slidingly connecting with the side walls of the housing. A first disc spring and a second disc spring are respectively disposed between the first and second friction systems and the end walls of the housing. This device can more comprehensively and flexibly respond to vibrations of varying magnitudes in buildings, selectively applying stratified frictional energy dissipation to different vibration amplitudes, and effectively performing its self-resetting function. While reducing vibration, it can completely reset the building without residual deformation.

Description

Technical Field

[0001] This invention relates to the field of building vibration reduction technology, and in particular to a self-resetting, separate collision-type graded friction damper. Technical Background

[0002] Throughout their lifespan, building structures are constantly subjected to vibrations from external influences, including the surrounding environment (such as the demolition of old buildings, disturbances from large construction equipment, and vibrations from high-speed rail operation) and the effects of earthquakes. Earthquakes, in particular, can severely impact the normal use of buildings and pose a significant threat to human life. Furthermore, post-earthquake building repair and reconstruction are complex issues. Therefore, vibration damping measures are crucial. With the development of current building vibration damping technology, friction dampers, characterized by replaceability and self-resetting, and utilizing frictional energy dissipation, have emerged, reducing the impact of external vibrations on buildings to a certain extent.

[0003] However, traditional friction dampers generally have high stiffness and cannot function well under small displacements, making buildings prone to fatigue failure under small displacement environments such as minor earthquakes and external vibrations. This problem is particularly prominent in steel structures. In addition, based on the design concept of "self-resetting and repair-free", friction dampers are gradually being associated with self-resetting mechanisms. However, traditional friction dampers with self-resetting functions have a large frictional energy dissipation capacity during the reset process, making it difficult for the building structure to fully reset and easily resulting in large residual deformation. Summary of the Invention

[0004] To address the problems existing in the prior art, the purpose of this invention is to provide a self-resetting, separate-collision graded friction damper. Under small displacements, only the first friction system and the first disc spring are activated, reducing the impact of external vibrations on the building while promoting the automatic reset of the damper. Under large displacements, both the first and second friction systems participate in energy dissipation, and both the first and second disc springs participate in reset. This achieves high energy dissipation and automatic reset of the damper under large displacements, making it less likely for the building to develop residual deformation.

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

[0006] This invention proposes a self-resetting, separate-collision graded friction damper, comprising a housing, wherein a first friction system is disposed within the housing, the first friction system being in contact with and slidably connected to the top and bottom walls of the housing, respectively; a second friction system is disposed on both sides of the first friction system, the second friction system being in contact with the top and bottom walls of the housing, and in contact with and slidably connected to the side walls of the housing; a first disc spring and a second disc spring are respectively disposed between the first friction system, the second friction system and the end walls of the housing.

[0007] Preferably, the first friction system includes a first friction plate, one end of which protrudes from the box body and is exposed, and side wings are provided on both sides. A slider is provided on the side wings, and the slider is partially embedded in the side wings. A first guide rod passes through the side wings and the embedded part of the slider, and its two ends contact the two end walls of the box body respectively. A first disc spring is sleeved on the end of the first guide rod. When the first disc spring is at its original length, its two ends contact the side wings and the end walls of the box body respectively. The protruding part of the slider is connected to the second friction system through a second guide rod.

[0008] Preferably, the second friction system includes a second friction plate. The front and rear ends of the slider are provided with second friction plates. The second friction plates contact the top wall, bottom wall and side wall of the box and are slidably connected to the side wall of the box. There is a gap between the second friction plate and the slider. The second guide rod passes through the protruding part of the second friction plate and the slider and its two ends contact the end wall of the box respectively. The end of the second guide rod is fitted with a second disc spring. When the second disc spring is at its original length, its two ends contact the second friction plate and the end wall of the box respectively.

[0009] Preferably, the first friction plate includes a plate neck and a plate body connected thereto. The free end of the plate neck passes through one end wall of the box and is exposed and slidably connected to that end wall of the box. The plate body is provided with a first long friction hole that runs through the plate body vertically. The plate body is slidably connected to the box body through the first long friction hole. The side wings are located on both sides of the middle part of the plate body.

[0010] Preferably, the second friction plate is L-shaped, with the vertical plate of the second friction plate contacting and slidingly connected to the box body, and the horizontal plate sleeved on the second guide rod, and contacting the second disc spring when the second disc spring is at its original length.

[0011] Preferably, the side wall of the box is provided with a second long friction hole, and the side wall of the box is slidably connected to the vertical plate of the second friction plate through the second long friction hole.

[0012] Preferably, the distances between the two ends of the plate and the two end walls of the box are both greater than the maximum compression length of the first disc spring.

[0013] Preferably, the box body is fitted with a clamp, the open end of which is located away from the box body and away from the plate neck, and is fixedly connected to the connecting plate.

[0014] Preferably, there are two clamps, and the open ends of the two clamps are fixedly connected by a connecting plate. The connecting plate is provided with an ear plate on the side away from the box body, and the ear plate and the plate neck are both located between the two clamps.

[0015] Preferably, the box body includes a bottom shell and a top cover that fits therewith.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] (1) The damper provided by the present invention can more comprehensively and flexibly cope with the vibrations of buildings of different sizes, and can perform graded friction energy dissipation for different vibration amplitudes of buildings. It can also perform self-resetting function well. When the vibration amplitude of the building is small, it has a small displacement and requires less energy. At this time, only the first friction energy dissipation system and the first disc spring work. It can not only meet the energy dissipation required for the building vibration reduction process, but also make the friction force of the damper small during the recovery process, so as not to affect the damper's return to its original position. When the vibration amplitude of the building is large, it has a large displacement and requires more energy. When the first friction plate in the first friction energy dissipation system moves to a certain extent, it will force the second friction system to participate in energy dissipation. During the recovery process of the damper, the first disc spring and the second disc spring act simultaneously first, and the recovery force is large. After the second disc spring returns to its original length, the first spring acts alone, which promotes the damper to return to its original position, thereby promoting the return of the building to its original position. It will not cause residual deformation of the building due to excessive friction force, nor will it cause unnecessary damage due to the building's too fast recovery.

[0018] (2) The damper provided by this invention includes a dual friction system and a dual reset disc spring, and the second friction plate is set in an L-shape. Each friction system has a corresponding reset system, ensuring that the damper can achieve a self-resetting effect when facing displacements of large and small without wasting the internal space of the damper. In addition, under large displacement, the dual reset system enables both the first and second friction energy dissipation systems of the damper to return to their initial state, allowing the damper to cope more flexibly with repeated loads, such as strong earthquakes, while better reducing residual displacement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the damper of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the box body of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the first friction plate of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the first guide rod and the second guide rod of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the top cover of the box body of the present invention;

[0024] Figure 6 This is a schematic diagram of the connecting plate of the present invention;

[0025] Reference numerals: 1. Box body; 101. Bottom shell; 102. Top cover; 103. Second long friction hole; 2. First friction plate; 201. Plate neck; 202. Plate body; 203. First long friction hole; 3. Side wing; 4. Slider; 5. First guide rod; 6. First disc spring; 7. First guide rod; 8. Second friction plate; 801. Vertical plate; 802. Horizontal plate; 9. Second disc spring; 10. Clamp; 11. Connecting plate; 12. Ear plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] refer to Figure 1 , Figure 2 This embodiment proposes a self-resetting, separate collision-type graded friction damper, characterized in that it includes a housing 1, in which a first friction system is provided. One end of the first friction system extends out of the housing 1, and its upper and lower ends contact and slide with the top and bottom walls of the housing 1, respectively. A second friction system is provided on both sides of the first friction system. The second friction system contacts the top and bottom walls of the housing 1 and contacts and slides with the side walls of the housing 1. A first disc spring 6 and a second disc spring 9 are respectively provided between the first friction system, the second friction system and the end walls of the housing 1.

[0028] In this embodiment, the two ends of the damper are hinged to the building via the exposed portion of the first friction system and the housing 1, respectively. This allows for graded vibration reduction of the building based on the magnitude of its vibration. When the building experiences small vibrations and undergoes minor displacement, requiring minimal energy consumption, only the first friction energy dissipation system and the first disc spring 6 are operational. During the building's displacement, the first disc spring 6 is compressed, and frictional energy dissipation occurs between the upper end of the first friction system and the top wall of the housing 1, and between the lower end of the first friction system and the bottom wall of the housing 1, thus achieving a damping effect. The damper then returns to its original position under the restoring force of the first disc spring 6. This satisfies the energy consumption requirements during the building's vibration reduction process while minimizing friction during the damper's return to its original position, ensuring that the damper's return to its original position is not affected. When the degree is large, a large displacement occurs, which requires a large amount of energy. During the displacement process, the first disc spring 6 is compressed. When the first friction energy dissipation system moves to a certain extent, it will force the second friction system to participate in energy dissipation. The second disc spring 9 is also compressed. In addition to the energy dissipation of the first friction system, the second friction system also has friction energy dissipation with the top wall, bottom wall and side wall of the box 1, which plays a role in vibration reduction. During the recovery process, the first disc spring 6 and the second disc spring 9 act simultaneously, with a large recovery force, which ensures that the building can return to its original position and will not cause residual deformation of the building due to excessive friction. After the second disc spring 9 returns to its original length, the first spring 6 acts alone, which allows the building to return to its original position without causing unnecessary damage due to excessive recovery.

[0029] refer to Figures 2 to 4 Preferably, the first friction system includes a first friction plate 2, and the second friction system includes a second friction plate 8. One end of the first friction plate 2 protrudes from the box body 1 and is exposed. Side wings 3 are also provided on both sides of the portion of the first friction plate 2 inside the box body 1. A slider 4 is provided on the side wing 3, and the slider 4 is partially embedded in the side wing 3. A first guide rod 5 passes through the side wing 3 and the embedded portion of the slider 4, and its two ends contact the two end walls of the box body 1 respectively. A first disc spring 6 is sleeved on the end of the first guide rod 5. When the first disc spring 6 is at its original length, both ends... The slider 4 is respectively in contact with the side wing 3 and the end wall of the box body 1. The front end and the rear end of the slider 4 are provided with a second friction plate 8. The second friction plate 8 is in contact with the top wall, bottom wall and side wall of the box body 1 and is slidably connected to the side wall of the box body 1. There is a gap between the second friction plate 8 and the slider 4. The second guide rod 7 passes through the protruding part of the second friction plate 8 and the slider 4 and its two ends are respectively in contact with the end wall of the box body 1. The end of the second guide rod 7 is fitted with a second disc spring 9. When the second disc spring 9 is at its original length, its two ends are in contact with the second friction plate 8 and the end wall of the box body 1 respectively.

[0030] In this embodiment, during vibration reduction, when the building experiences a small displacement, the displacement of the first friction plate 2 is also small, and one end of the first disc spring 6 is compressed. Friction energy is generated between the upper end of the first friction plate 2 and the top wall of the box 1, between the lower end of the first friction plate 2 and the bottom wall of the box 1, between the first friction plate 2 and one end of the box 1, between the side wing 3 and the first guide rod 5, between the slider 4 and the first guide rod 5, and between the slider 4 and the second guide rod 7. When the building reaches the point of maximum small displacement, the compressed first disc spring 6 generates a restoring force, causing the damper to automatically reset. When the building experiences a large displacement, the first friction plate... When the displacement reaches a certain level, the slider 4 collides with the second friction plate 8, activating the second friction system. The second disc spring 9 on one side is compressed. At this time, in addition to the friction energy loss between the first friction plate 2 and the box 1, the side wing 3 and the first guide rod 5, the slider 4 and the first guide rod 5, and the slider 4 and the second guide rod 7, friction energy loss is also generated between the second friction plate 8 and the top wall of the box 1, the second friction plate 8 and the bottom wall of the box 1, the second friction plate 8 and the side wall of the box 1, and the second friction plate 8 and the second guide rod 7. This meets the high energy consumption requirements when the building experiences large-amplitude vibrations.

[0031] refer to Figure 2 , Figure 3 Preferably, the first friction plate 2 includes a neck 201 and a body 202 connected thereto. The free end of the neck 201 passes through one end wall of the box body 1 and is slidably connected to that end wall. The body 202 is provided with a first long friction hole 203, which extends vertically through the body 202. Bolts pass through the top wall of the box body 1, the first long friction hole 203, and the bottom wall of the box body 1 in sequence to slidably connect the box body 1 and the first friction plate 2. The second friction plate 8 is L-shaped. The side wall of the box body 1 is provided with a second long friction hole 103. Bolts pass through the second long friction hole 103 and the vertical plate 801 of the second friction plate 8 to slidably connect the side wall of the box body 1 and the second friction plate 8. The horizontal plate 802 of the second friction plate 8 is sleeved on the second guide rod 7 and contacts the second disc spring 9 when the second disc spring 9 is at its original length. There is a gap between the free end of the horizontal plate 802 of the second friction plate 8 and the side wing 3 of the first friction plate 1.

[0032] In this embodiment, the neck 201 is hinged to the building. When the first friction plate 2 slides relative to the box 1, friction energy is also generated between the bolt and the first long friction hole 203. After the second friction system is started, the second friction plate 8 slides relative to the box 1, and friction energy is also generated between the bolt and the second long friction hole 103, which increases the shock absorption effect. In this embodiment, the second friction plate 8 is set as L-shaped, which meets the energy consumption requirements while saving space. There is a gap between the free end of the horizontal plate 802 of the second friction plate 8 and the side wing 3 of the first friction plate 2 to prevent the second friction system from participating in energy consumption when the building undergoes small displacement, which would cause excessive friction and affect the building's reset.

[0033] Preferably, the distances between the two ends of the plate 202 and the two end walls of the box 1 are both greater than the maximum compression length of the first disc spring 6, so as to prevent the first friction plate 2 from being unable to slide relative to the box 1 when the building vibrates significantly, thus preventing the damper from failing.

[0034] refer to Figure 1 , Figure 5 , Figure 6 Preferably, the box body 1 includes a bottom shell 101 and a top cover 102 that cooperates with it. The first friction system and the second friction system are disposed inside the bottom shell 101. The box body 1 is fitted with a clamp 10. The open end of the clamp 10 is located at the end away from the box body 1 and away from the plate neck 201. There are two clamps 10. The open ends of the two clamps 10 are fixedly connected by a connecting plate 11. The connecting plate 11 is provided with an ear plate 12 on the side away from the box body 1. The ear plate 12 and the plate neck 201 are both located between the two clamps 11.

[0035] In this embodiment, the box body 1 includes a bottom shell 101 and a matching top cover 102, which facilitates installation and disassembly. The box body 1 is fitted with a clamp 10 to protect the damper. The connecting plate 11 is provided with an ear plate 12, and the damper can be hinged to the building through the ear plate 12.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A self-resetting, separation-collision type graded friction damper, characterized in that, Includes a box body (1), inside which a first friction system is provided. The first friction system contacts and slides with the top wall and bottom wall of the box body (1) respectively. A second friction system is also provided on both sides of the first friction system. The second friction system contacts the top wall and bottom wall of the box body (1) and contacts and slides with the side wall of the box body (1). A first disc spring (6) and a second disc spring (9) are respectively provided between the first friction system, the second friction system and the end wall of the box body (1). The first friction system includes a first friction plate (2), one end of which protrudes from the box body (1) and is exposed, and side wings (3) are provided on both sides. A slider (4) is provided on the side wing (3), and the slider (4) is partially embedded in the side wing (3). A first guide rod (5) passes through the embedded part of the side wing (3) and the slider (4) and its two ends are respectively in contact with the two end walls of the box body (1). A first disc spring (6) is sleeved at the end of the first guide rod (5). When the first disc spring (6) is at its original length, its two ends are respectively in contact with the side wing (3) and the end wall of the box body (1). The protruding part of the slider (4) is connected to the second friction system through the second guide rod (7).

2. The self-resetting, separate-collision graded friction damper according to claim 1, characterized in that, The second friction system includes a second friction plate (8). The front end and rear end of the slider (4) are provided with the second friction plate (8). The second friction plate (8) contacts the top wall, bottom wall and side wall of the box (1) and slides in connection with the side wall of the box (1). There is a gap between the second friction plate (8) and the slider (4). The second guide rod (7) passes through the protruding part of the second friction plate (8) and the slider (4) and its two ends contact the end wall of the box (1) respectively. The end of the second guide rod (7) is fitted with a second disc spring (9). When the second disc spring (9) is at its original length, its two ends contact the second friction plate (8) and the end wall of the box (1) respectively.

3. The self-resetting, separate-collision graded friction damper according to claim 1, characterized in that, The first friction plate (2) includes a plate neck (201) and a plate body (202) connected thereto. The free end of the plate neck (201) passes through one end wall of the box body (1) and is exposed and slidably connected to that end wall of the box body (1). The plate body (202) is provided with a first long friction hole (203). The first long friction hole (203) passes through the plate body (202) vertically. The plate body (202) is slidably connected to the box body (1) through the first long friction hole (203). The side wings (3) are located on both sides of the middle part of the plate body (202).

4. The self-resetting, separation-collision type graded friction damper according to claim 2, characterized in that, The second friction plate (8) is L-shaped. The vertical plate (801) of the second friction plate (8) contacts and slides with the box body (1). The horizontal plate (802) is sleeved on the second guide rod (7) and contacts the second disc spring (9) when the second disc spring (9) is at its original length.

5. The self-resetting, separation-collision type graded friction damper according to claim 4, characterized in that, The side wall of the box (1) is provided with a second long friction hole (103), and the side wall of the box (1) is slidably connected to the vertical plate (801) of the second friction plate (8) through the second long friction hole (103).

6. The self-resetting, separate-collision graded friction damper according to claim 3, characterized in that, The distances between the two ends of the plate (202) and the two end walls of the box (1) are both greater than the maximum compression length of the first disc spring (6).

7. The self-resetting, separate-collision graded friction damper according to claim 3, characterized in that, The box body (1) is fitted with a clamp (10) on the outside. The open end of the clamp (10) is located away from the box body (1) and away from the plate neck (201), and is fixedly connected to the connecting plate (11).

8. The self-resetting, separate-collision graded friction damper according to claim 7, characterized in that, There are two clamps (10), and the open ends of the two clamps (10) are fixedly connected by a connecting plate (11). The connecting plate (11) is provided with an ear plate (12) on the side away from the box body. The ear plate (12) and the plate neck (201) are both located between the two clamps (10).

9. The self-resetting, separate-collision graded friction damper according to claim 1, characterized in that, The box body (1) includes a bottom shell (101) and a top cover (102) that cooperates with it.

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