A self-resetting dual-chamber staged friction damper

Abstract

The application relates to a self-resetting double-chamber graded friction damper, which comprises a frame, a partition plate arranged in the frame, the partition plate divides the frame into a first chamber and a second chamber, a first friction plate arranged in the first chamber, a second friction plate and a third friction plate arranged in the second chamber, the third friction plate is abutted against the partition plate and the side wall of the frame close to the second chamber at two ends, the second friction plate is slidably connected with the first friction plate through two stop blocks penetrating through the partition plate, a disc spring is arranged between the two stop blocks, and a disc spring is arranged between the third friction plate and the frame, the damper can be used for graded friction energy consumption of large and small displacements of a building and can always play a self-resetting function under the large and small displacements, so that the damper can be more easily completely reset under the condition of large energy consumption, and thus residual deformation of the building is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building shock absorption, in particular to a self-resetting double-chamber staged friction damper. BACKGROUND

[0002] Building structures will be continuously subjected to external influences to produce vibrations throughout their life cycle, including the influence of the surrounding environment (such as the demolition of old buildings, the disturbance of large construction equipment, and the vibration of high-speed rail operation, etc.) and the influence of earthquakes, especially once an earthquake occurs, which will greatly affect the normal use of buildings and pose a great threat to human life. In addition, the repair and reconstruction of buildings after an earthquake is also a relatively complex problem. Therefore, building shock absorption measures are particularly important. With the development of current building shock absorption technology, friction dampers, which are characterized by replaceability and self-resetting and represented by friction energy dissipation, have reduced the influence of external vibrations on buildings to some extent.

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

[0004] In view of the problems in the prior art, the present application aims to provide a self-resetting double-chamber staged friction damper that only activates horizontal friction energy dissipation under small displacement, thereby reducing the influence of external vibrations on buildings while promoting automatic resetting of the damper, and simultaneously activates horizontal and vertical friction energy dissipation under large displacement, thereby achieving bidirectional friction energy dissipation and automatic resetting of the damper under large displacement.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The present application provides a self-resetting double-chamber staged friction damper, which comprises a frame, a partition plate is arranged in the frame, the partition plate divides the frame into a first chamber and a second chamber, a first friction plate is arranged in the first chamber, a second friction plate and a third friction plate are arranged in the second chamber, one end of the second friction plate passes through the partition plate and is slidably connected to the first friction plate through two stop blocks, a disc spring is arranged between the two stop blocks, a trapezoidal protruding portion is arranged in the middle of the second friction plate in the second chamber, a trapezoidal groove longer than the protruding portion is arranged in the middle of the third friction plate, the two ends of the third friction plate abut against the partition plate and the side wall of the frame close to the second chamber, respectively, and a disc spring is arranged between the third friction plate and the frame.

[0007] Preferably, the first friction plate comprises a plate neck and a plate body connected with the plate neck, the plate neck is exposed outside the frame and fixedly connected with the frame, the plate body is fixedly connected with the partition plate at a free end, the plate body is provided with a rectangular hole near the free end, the second friction plate is provided with a rectangular hole at one end connected with the first friction plate, and the stop block passes through the rectangular holes on the plate body and the second friction plate to slidingly connect the plate body and the second friction plate.

[0008] Preferably, the upper and lower parts of the stop block are provided with stop tables, the stop block passes through the rectangular holes on the first friction plate and the second friction plate, and the upper and lower stop tables clamp the first friction plate and the second friction plate.

[0009] Preferably, when the disc spring between the two stop blocks is at the original length, the two stop blocks are in contact with two ends of the rectangular hole, respectively.

[0010] Preferably, the second friction plate is provided with friction holes on both sides of the rectangular hole, respectively, and the bolts pass through the friction holes and are connected with the first friction plate.

[0011] Preferably, two first friction plates are arranged in the first chamber, and one end of the second friction plate connected with the two first friction plates is located between the two first friction plates.

[0012] Preferably, the second chamber is provided with third friction plates above and below the second friction plate.

[0013] Preferably, the third friction plate is connected with the frame through a metal rod, and the metal rod is sleeved with a disc spring.

[0014] Preferably, one end of the second friction plate away from the first friction plate is exposed outside the frame and provided with a plate lug.

[0015] Preferably, the partition plate comprises an upper partition plate and a lower partition plate, the second friction plate passes through between the upper partition plate and the lower partition plate and is in contact with the upper partition plate and the lower partition plate.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] (1) The damper provided by the application can realize the reset effect in left and right movements through the same disc spring, without the need to design components for realizing the reset effect in different directions, so that the design length of the damper is reduced, the building space is saved, the use of friction materials and reset materials is saved, the number of openings of the friction materials is reduced, the friction energy consumption and the bidirectional reset effect are realized with as little material as possible, and the self stiffness of each component of the damper is improved to prolong the service life of the damper.

[0018] (2) The damper provided by the application can provide sufficient energy dissipation capacity through horizontal friction energy dissipation and vertical friction energy dissipation, so that the damper can generate sufficient energy dissipation capacity on the basis of sufficient deformation when coping with large displacement, that is, the damper provided by the application will not be damaged prematurely due to the fact that the displacement of the building is greater than the maximum deformation that the damper can generate when coping with large displacement, and the building will not be damaged due to insufficient energy dissipation capacity, so that the building can better cope with low-frequency vibration.

[0019] (3) When the damper provided by the application is in a large displacement state and is in transition to an initial state, the horizontal friction energy dissipation system can achieve the effect of slow resetting to prevent the building structure from being damaged unnecessarily due to excessive swing speed, and the vertical friction participates in energy dissipation but does not hinder the resetting process, so that the damper can be easily reset completely even in the case of large energy dissipation, thereby promoting the complete resetting of the building.

[0020] (4) The damper provided by the application can more comprehensively and flexibly cope with large and small vibration actions, and can perform hierarchical friction energy dissipation for large and small displacement and always exhibit a self-resetting function under large and small displacement. Under small displacement, only horizontal energy dissipation is started to realize the self-resetting function and friction energy dissipation under small displacement; under large displacement, horizontal energy dissipation and vertical energy dissipation act simultaneously to realize the bidirectional friction energy dissipation and automatic resetting function of the damper under large displacement. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the damper of the application;

[0022] Figure 2 is a schematic diagram of the structure inside the frame of the application;

[0023] Figure 3 is a schematic diagram of the connection structure of the first friction plate and the second friction plate of the application;

[0024] Figure 4 is a schematic diagram of the structure of the first friction plate of the application;

[0025] Figure 5 is a schematic diagram of the structure of the stop block of the application;

[0026] Figure 6 is a schematic diagram of the structure of the second friction plate of the application;

[0027] Figure 7 is a schematic diagram of the structure of the third friction plate of the application;

[0028] 1, frame, 2, partition, 201, upper partition, 202, lower partition, 3, first chamber, 4, second chamber, 5, first friction plate, 501, plate neck, 502, plate body, 503, rectangular hole, 6, second friction plate, 601, convex part, 602, plate ear, 603, friction hole, 7, third friction plate, 701, groove, 8, stop block, 9, disc spring. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0030] With reference to Figure 1 , Figure 3 and Figure 7 , the present embodiment provides a self-resetting double-chamber staged friction damper, which comprises a frame 1, a partition 2 is arranged in the frame 1, the partition 2 divides the frame 1 into a first chamber 3 and a second chamber 4, a first friction plate 5 is arranged in the first chamber 3, one end of the first friction plate 5 penetrates out of the frame 1 near the side wall of the first chamber 3 and is fixedly connected with the side wall, the other end is fixedly connected with the partition 2, a second friction plate 6 and a third friction plate 7 are arranged in the second chamber 4, one end of the second friction plate 6 penetrates through the partition 2 and is slidably connected with the first friction plate 5 through two stop blocks 8, the other end penetrates out of the frame 1 near the side wall of the second chamber 4 and is slidably connected with the side wall, a disc spring 9 is arranged between the two stop blocks 8, a trapezoidal convex part 601 is arranged in the middle of the second friction plate 6, a trapezoidal groove 701 longer than the convex part 601 is arranged in the middle of the third friction plate 7, preferably, the two ends of the third friction plate 7 abut against the partition 2 and the side wall of the frame 1 near the second chamber 4 respectively, and the disc spring 9 is arranged between the third friction plate 7 and the frame 1.

[0031] In the embodiment, the exposed end of the first friction plate 5 is hinged to one side of the building, and the exposed end of the second friction plate 6 is hinged to the other side of the building. When the building has small displacement vibration, only the horizontal friction energy dissipation is started, at this time, the second friction plate 6 moves horizontally, the horizontal friction energy dissipation is generated between the first friction plate 5 and the second friction plate 6, between the second friction plate 6 and the partition plate 2, between the second friction plate 6 and the side wall of the frame 1 close to the second chamber 4, and between the stop block 8 and the first friction plate 5 or the second friction plate 6, so as to realize the damping effect on the building. In the recovery process, the damper is reset under the action of the disc spring 9 between the two stop blocks 8, and the building is also reset. When the building has large displacement vibration, the horizontal friction energy dissipation and the vertical friction energy dissipation are started at the same time. When the waist of the trapezoidal protruding part 601 abuts against the waist of the trapezoidal recess 701, the vertical friction energy dissipation is started, at this time, the protruding part 601 continues to move horizontally, which promotes the third friction plate 7 to move vertically away from the second friction plate 6, the vertical friction energy dissipation is generated between the waist of the protruding part 601 and the waist of the recess 701, between the third friction plate 7 and the partition plate 2, and between the third friction plate 7 and the side wall of the frame 1 close to the second chamber 4. That is, when the building has large displacement, the horizontal friction energy dissipation and the vertical friction energy dissipation are generated at the same time. In the building recovery process, the disc spring 9 between the third friction plate 7 and the frame 1 realizes vertical reset, and the vertical friction does not hinder the reset process. Therefore, the resistance of the building in the reset process is small, that is, the building is prevented from being damaged due to inertia reset too fast, and the building slowly returns to the original position under the action of the horizontal disc spring 9, so that residual deformation of the building is avoided.

[0032] Reference Figure 1 , Figure 3 , Figure 4 and Figure 6Preferably, two first friction plates 5 are arranged vertically in the first chamber 3, one end of the second friction plate 6 connected with the two first friction plates 5 is located between the two first friction plates 5, the first friction plate 5 comprises a plate neck 501 and a plate body 502, the plate neck 501 is exposed and fixedly connected with the frame 1, the free end of the plate body 502 is fixedly connected with the baffle 2, a rectangular hole 503 is arranged on the plate body 502 close to the free end, a rectangular hole 503 is arranged on the end of the second friction plate 6 away from the frame 1, the rectangular hole 503 on the second friction plate 6 corresponds to the rectangular hole 503 on the first friction plate 5, the stop block 8 is arranged through the rectangular holes 503 on the plate body 502 and the second friction plate 6, the upper stop block contacts the upper first friction plate 5, and the lower stop block contacts the lower first friction plate 5, so as to slidingly connect the plate body 502 and the second friction plate 6, a disc spring 9 is arranged between the end portions of the two stop blocks 8, when the disc spring 9 is in the original length, the two stop blocks 8 respectively contact the two ends of the rectangular hole 503, when the building is displaced, the damper can immediately respond, the middle portion of the stop block 8 is narrower than the rectangular hole 503 on the first friction plate 5, and the stop block 8 can rotate by 90 degrees after passing through the rectangular holes 503 on the plate body 502 and the second friction plate 6, so that the upper stop block and the lower stop block clamp the first friction plate 5 and the second friction plate 6.

[0033] In the embodiment, when the building is displaced, the second friction plate 6 moves, because the two stop blocks 8 respectively contact the two ends of the rectangular hole 503 on the second friction plate 6 and the first friction plate 5 when the disc spring 9 is in the original length, the movement of the second friction plate 6 drives one of the stop blocks 8 to move, the damper compresses the disc spring 9 between the stop blocks 8 while generating horizontal friction energy dissipation, and the damper resets under the action of the elasticity of the disc spring 9 during the resetting process of the building.

[0034] Referring to Figure 1 , Figure 4 and Figure 5 , preferably, friction holes 603 are arranged on the two sides of the rectangular hole 503 on the second friction plate 6, and a bolt passes through the friction holes 603 and is connected with the first friction plate 5.

[0035] In the embodiment, friction is generated between the bolt and the friction hole 603 when the building is displaced, and the horizontal energy dissipation of the damper is increased during the damping process.

[0036] Referring to Figure 1 , Figure 3 to Figure 5The second friction plate 6 is provided with a third friction plate 7 above and below in the second chamber 4, and the second friction plate 6 is exposed outside the frame 1 at one end away from the first friction plate 5 and is provided with a plate lug 602, and the second friction plate 6 is provided with a trapezoidal protruding part 601 at the upper end and the lower end of the middle part of the second chamber 4, the upper third friction plate 7 is connected with the upper wall of the frame 1 through a metal rod, a disc spring 9 is sleeved on the metal rod, the lower third friction plate 7 is connected with the lower wall of the frame 1 through a metal rod, and a disc spring 9 is sleeved on the metal rod, when the disc spring 9 is at the original length, the two ends are in contact with the third friction plate 7 and the frame 1 respectively.

[0037] In the embodiment, when the building has a large displacement, the waist of the protruding part 601 is in contact with the waist of the groove 701 in the sliding process, the vertical energy dissipation is started, the upper protruding part 601 extrudes the upper third friction plate 7, the upper third friction plate 7 moves vertically upward, the lower protruding part 601 extrudes the lower third friction plate 7, the lower third friction plate 7 moves vertically downward, and the two ends of the third friction plate 7 are in friction with the partition plate 2 and the side wall of the frame 1 respectively in the vertical movement process, thereby playing a role of energy dissipation.

[0038] Reference Figure 1 and Figure 2 Preferably, the partition plate 2 comprises an upper partition plate 201 and a lower partition plate 202, the second friction plate 6 passes through between the upper partition plate 201 and the lower partition plate 202 and is in contact with the upper partition plate 201 and the lower partition plate 202, and in the embodiment, the second friction plate 6 is easy to install.

[0039] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A self-resetting dual-chamber graded friction damper, characterized in that, The system includes a frame (1), a partition (2) is provided inside the frame (1), the partition (2) divides the interior of the frame (1) into a first chamber (3) and a second chamber (4), a first friction plate (5) is provided in the first chamber (3), a second friction plate (6) and a third friction plate (7) are provided in the second chamber (4), one end of the second friction plate (6) passes through the partition (2) and is slidably connected to the first friction plate (5) through two blocks (8), a disc spring (9) is provided between the two blocks (8), the second friction plate (6) is located in the middle of the second chamber (4) and has a trapezoidal protrusion (601), the third friction plate (7) has a trapezoidal groove (701) longer than the protrusion (601) in the middle, the two ends of the third friction plate (7) respectively abut against the partition (2) and the side wall of the frame (1) near the second chamber (4), and a disc spring (9) is provided between the third friction plate (7) and the frame (1); The first friction plate (5) includes a neck (501) and a body (502) connected thereto. The neck (501) passes through the frame (1) and is exposed and fixedly connected to the frame (1). The free end of the body (502) is fixedly connected to the partition (2). A rectangular hole (503) is provided near the free end of the body (502). A rectangular hole (503) is provided at the end of the second friction plate (6) connected to the first friction plate (5). The stop block (8) passes through the body (502) and the second friction plate (6). A rectangular hole (503) is used to slide the plate body (502) and the second friction plate (6) together; two first friction plates (5) are arranged vertically in the first chamber (3), and one end of the second friction plate (6) connected to the two first friction plates (5) is located between the two first friction plates (5) vertically; in the second chamber (4), a third friction plate (7) is arranged vertically on both the second friction plate (6); the third friction plate (7) is connected to the frame (1) by a metal rod, and a disc spring (9) is sleeved on the metal rod.

2. The self-resetting dual-chamber graded friction damper according to claim 1, characterized in that, The upper and lower parts of the stop block (8) are respectively provided with a stop platform. The stop block (8) passes through the rectangular hole (503) on the first friction plate (5) and the second friction plate (6). The upper and lower stop platforms lock the first friction plate (5) and the second friction plate (6).

3. The self-resetting dual-chamber graded friction damper according to claim 1, characterized in that, When the disc spring (9) between the two stops (8) is at its original length, the two stops (8) are in contact with the two ends of the rectangular hole (503) respectively.

4. The self-resetting dual-chamber graded friction damper according to claim 1, characterized in that, Friction holes (603) are provided on both sides of the rectangular hole (503) on the second friction plate (6), and bolts are connected to the first friction plate (5) through the friction holes (603).

5. The self-resetting dual-chamber graded friction damper according to claim 1, characterized in that, The second friction plate (6) is exposed through the frame (1) at the end away from the first friction plate (5) and is provided with a plate lug (602).

6. The self-resetting dual-chamber graded friction damper according to claim 1, characterized in that, The partition (2) includes an upper partition (201) and a lower partition (202), and the second friction plate (6) passes between the upper partition (201) and the lower partition (202) and contacts the upper partition (201) and the lower partition (202).

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