Metal variable friction composite damper

Abstract

The utility model provides a metal variable friction composite damper, and relates to the technical field of building energy dissipation and shock absorption. The device comprises at least two sets of friction pulling plates and friction clamping plates, an upper metal cover plate, a lower metal cover plate and at least one set of deformation energy dissipation assemblies, mounting grooves matched with the friction pulling plates are formed in the friction clamping plates, and one ends of the friction pulling plates are in sliding friction along the mounting grooves after being stressed; a plurality of high-strength bolts penetrate through the friction clamping plate and limit one end of the friction pulling plate on the inner side of the friction clamping plate, pre-pressing springs are installed at the ends of the high-strength bolts, and connecting parts are arranged at the ends of the friction clamping plate. Bolt holes are formed in the other ends of the friction pulling plates, the metal upper cover plate and the metal lower cover plate are oppositely arranged, form a containing space and are connected with the two friction pulling plates in a matched mode through connecting bolts, and the deformation energy dissipation assembly is arranged in the containing space. The composite damper has double self-resetting mechanisms, can ensure that the structure realizes lossless recovery in small and medium earthquakes, and also has better self-resetting capability in large earthquakes and extremely rare earthquakes.

Description

Technical Field

[0001] The utility model relates to the technical field of building energy consumption and shock absorption, in particular to a metal variable friction composite damper. Background Art

[0002] In order to ensure the seismic safety of building structures under rare and extremely rare earthquakes, various types of dampers can be added to the structure to dissipate external input energy and play an energy-dissipating and shock-absorbing role. Metal dampers and friction dampers are two types of dampers that are widely used at present. When encountering extremely rare earthquakes, they may cause excessive deformation and cause the damper itself to suffer significant damage and fail. In short, a single energy-dissipating damper is difficult to ensure the safety of building structures in extremely rare earthquakes.

[0003] Friction dampers need to dissipate structural vibration energy through the friction force generated by the relative sliding between friction surfaces, and metal dampers need to dissipate structural vibration energy through metal deformation, but they may produce excessive residual deformation in rare and extremely rare earthquakes, that is, they do not have self-reset capabilities. Even if the building structure is still safe, it will seriously affect its recovery function. In summary, the existing technology cannot meet the needs, and there is an urgent need for composite dampers with alternating energy dissipation characteristics to ensure the stability of building structures in rare and extremely rare earthquakes, and dampers with self-reset characteristics to ensure that the damper can largely eliminate the impact of residual deformation.

[0004] In view of the above reasons, the utility model proposes a metal variable friction composite damper to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a metal variable friction composite damper, which has a dual self-reset mechanism, can ensure that the structure can achieve lossless recovery in small and medium earthquakes, and can also have good self-reset ability in large earthquakes and extremely rare earthquakes.

[0006] The utility model provides a metal variable friction composite damper, comprising: at least two groups of friction plates and friction clamps, a metal upper cover plate, a metal lower cover plate and at least one group of deformation energy dissipation components, the thickness of the end of the friction plate is greater than the thickness of the middle, the friction clamp is provided with a mounting groove adapted to the side shape of the friction plate, one end of the friction plate is matched with the mounting groove and can generate sliding friction along the mounting groove after being subjected to force, a plurality of high-strength bolts pass through the friction clamp and limit one end of the friction plate to the inner side thereof, the end of the high-strength bolt is provided with a pre-stressed spring, and the end of the friction clamp is provided with a connecting portion matched with a building component;

[0007] A bolt hole is provided at the other end of the friction pull plate, the metal upper cover plate and the metal lower cover plate are arranged relative to each other to form a receiving space, the two sides of the metal upper cover plate and the metal lower cover plate are respectively connected with the two groups of the bolt holes on the friction pull plates through connecting bolts, and the deformation energy dissipation component is arranged in the receiving space between the metal upper cover plate and the metal lower cover plate.

[0008] Preferably, the metal upper cover plate and the metal lower cover plate are both C-shaped, and are respectively arranged on the upper side and the lower side of the adjacent parts of the two groups of friction pull plates.

[0009] Preferably, the deformation energy dissipation components are disc spring components, and there are multiple groups of them.

[0010] Preferably, the two groups of friction plates are coaxially arranged, and each group of disc spring assemblies is symmetrically arranged in the accommodating space about the axis of the friction plates.

[0011] Preferably, the disc spring assembly includes a disc spring and a loading head and a moving part respectively arranged at both ends of the disc spring, the two ends of the disc spring are respectively embedded in the loading head and the moving part, a stud is fixed on the end surface of the moving part, and the adjacent ends of the two groups of friction plates are respectively provided with an embedding groove for embedding the loading head and a screw hole for cooperating with the stud.

[0012] Preferably, the thickness of the portion of the friction plate extending into the inner portion of the friction clamping plate gradually increases from the middle to both sides, and the contact surfaces of the friction plate and the friction clamping plate are matched serrated friction surfaces.

[0013] Preferably, a plurality of groups of countersunk long holes are provided on both sides of the surface of the friction clamp plate, and a plurality of high-strength bolts pass through the countersunk long holes respectively and are fastened therewith by nuts, and the plurality of high-strength bolts cooperate to limit one end of the friction pull plate to its inner side.

[0014] Preferably, the pre-compression spring is located on the inner side of the nut, and after the pre-compression spring is installed, a pre-compression is applied thereto so that the nut is in a compressed state.

[0015] Preferably, when an earthquake just occurs, the metal upper cover plate, the metal lower cover plate and the deformation energy dissipation component are deformed while the friction plate and the friction clamp plate do not slide relative to each other, and then the metal upper cover plate, the metal lower cover plate and the deformation energy dissipation component stop deforming, and the friction plate and the friction clamp plate slide relative to each other.

[0016] Preferably, the connecting portion is a connecting ring.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The utility model adopts a double self-reset mechanism. First, when the metal upper cover plate and the metal lower cover plate are deformed, the deformation energy dissipation components located on the inner side of the two can provide self-reset capability; when the friction plate and the friction clamp plate slide relative to each other, the high-strength bolts and the preload springs are compressed during installation to provide self-reset capability; this mechanism can ensure that the damper can achieve lossless recovery in small and medium earthquakes, and still have good self-reset capability in large earthquakes;

[0019] 2. The utility model adopts an energy dissipation mechanism of alternating energy dissipation. By designing various parameters of the damper, such as metal deformation parameters and friction surface parameters, relative sliding does not occur simultaneously but occurs in sequence, and a mechanism of two energy dissipation not occurring simultaneously is realized to realize the function of alternating energy dissipation of the damper. During use, the metal upper cover plate and the metal lower cover plate are first deformed to dissipate energy, and then the relative friction between the friction clamp plate and the friction pull plate is used to dissipate energy. This avoids the wear of the damper caused by a single energy dissipation mechanism, can extend the service life of the damper, and ensures the reliability and durability of the damper.

[0020] 3. The present invention can increase the maximum allowable stroke of the damper during earthquake action by adding a number of connecting parts, a metal upper cover plate, a metal lower cover plate and a deformation energy dissipation component between the two friction pull plates. This design can improve the seismic performance of the building structure in rare and extremely rare earthquakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is an overall schematic diagram of a metal variable friction composite damper according to a first embodiment of the utility model;

[0023] Figure 2 This is an exploded schematic diagram of a metal variable friction composite damper according to a first embodiment of the utility model;

[0024] Figure 3 It is a front cross-sectional view of the friction part of the metal variable friction composite damper of Example 1;

[0025] Figure 4 for Figure 3 Schematic diagram of the changes of part A in the middle when subjected to axial tension;

[0026] Figure 5 It is a front cross-sectional view of the connection between the friction pull plate and the metal upper cover plate and the metal lower cover plate in the first embodiment;

[0027] Figure 6 is a front cross-sectional view of the deformation energy dissipation component in the first embodiment;

[0028] Figure 7 It is a schematic diagram of the movement of the deformation energy dissipation component from axial tension to axial compression in the first embodiment;

[0029] Figure 8 It is a structural schematic diagram of the connecting plate in the second embodiment.

[0030] Description of reference numerals:

[0031] 1-1, first friction clamp; 1-2: second friction clamp; 1-3: mounting groove; 2-1: first friction pull plate; 2-2: second friction pull plate; 3-1: metal upper cover plate; 3-2: metal lower cover plate; 4: deformation energy dissipation component; 4-1: loading head; 4-2: disc spring; 4-3: moving part; 4-4: stud; 5: high-strength bolt; 5-1: pre-stressed spring; 6: connecting part; 7-1: bolt hole; 7-2: connecting bolt; 8: connecting plate. DETAILED DESCRIPTION

[0032] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] Embodiment 1

[0036] like Figure 1-7 As shown, the utility model provides a metal variable friction composite damper, comprising: a first friction plate 2-1, a second friction plate 2-2, a first friction clamping plate 1-1, a second friction clamping plate 1-2, a metal upper cover plate 3-1, a metal lower cover plate 3-2 and at least one group of deformation energy dissipation components 4, wherein the matching installation relationship between the first friction plate 2-1 and the first friction clamping plate 1-1 and the matching installation relationship between the second friction plate 2-2 and the second friction clamping plate 1-2 are completely symmetrically arranged. The first friction plate 2-1 and the first friction clamping plate 1-1 are used as an example to illustrate the invention. The thickness of the end of the first friction plate 2-1 is The first friction plate 1-1 has a mounting groove 1-3 that matches the side shape of the first friction plate 2-1. The side of the mounting groove 1-3 close to the first friction plate 2-1 is completely open, so that one end of the first friction plate 2-1 can be inserted. One end of the first friction plate 2-1 is installed in cooperation with the mounting groove 1-3 and can generate sliding friction along the mounting groove 1-3 after being subjected to force. The inner wall of the mounting groove 1-3 and the surface of the first friction plate 2-1 are matched metal friction surfaces, and a large friction force can be generated during the relative sliding process between the first friction plate 2-1 and the first friction plate 1-1. A plurality of high-strength bolts 5 pass through the first friction clamping plate 1-1 and confine one end of the first friction tension plate 2-1 inside thereof; a preload spring 5-1 is installed at the end of the high-strength bolt 5; the magnitude of the initial friction force can be changed by adjusting the preload of the preload spring 5-1; a connecting portion 6 for connecting with a building component is provided at the end of the first friction clamping plate 1-1; by cooperating with the connecting portions 6 on the end faces of two groups of the first friction clamping plates 1-1, the damper can be connected with the building component to realize the effect of friction energy dissipation under rare or extremely rare earthquakes.

[0037] like Figure 2As shown, a bolt hole 7-1 is provided at the other end of the first friction plate 2-1, and the metal upper cover plate 3-1 and the metal upper cover plate 3-2 are arranged relatively to form a receiving space. The two sides of the metal upper cover plate 3-1 and the metal upper cover plate 3-2 are respectively connected with the bolt holes 7-1 on the first friction plate 2-1 and the second friction plate 2-2 through connecting bolts 7-2, and the deformation energy dissipation component 4 is arranged in the receiving space between the metal upper cover plate 3-1 and the metal upper cover plate 3-2.

[0038] In this embodiment, the metal upper cover plate 3-1 and the metal upper cover plate 3-2 are both C-shaped, and are respectively arranged on the upper and lower sides of the adjacent parts of the two groups of first friction plates 2-1 and second friction plates 2-2. Ribs extend outward from both ends of the metal upper cover plate 3-1 and the metal upper cover plate 3-2, and circular holes corresponding to the bolt holes 7-1 are opened on the ribs. The connecting bolts 7-2 pass through the circular holes on the ribs of the metal upper cover plate 3-1, the bolt holes 7-1 at both ends of the first friction plate 2-1 and the second friction plate 2-2, and the circular holes on the ribs of the metal upper cover plate 3-2 in sequence to achieve the matching connection of the four components.

[0039] In this embodiment, the contact surfaces of the first friction plate 2-1 and the first friction clamping plate 1-1 are matched sawtooth friction surfaces, and the thickness of the first friction plate 2-1 extending into the interior of the first friction clamping plate 1-1 gradually increases from the middle to the sides. A plurality of groups of countersunk long holes are provided on both sides of the surface of the first friction clamping plate 1-1, and a plurality of high-strength bolts 5 pass through each countersunk long hole and are fastened with nuts, and the plurality of high-strength bolts 5 cooperate to limit one end of the first friction plate 2-1 to the inner side thereof. The preload spring 5-1 is located on the inner side of the nut. In order to make the relative sliding of the friction part occur after the metal upper cover plate 3-1 and the metal upper cover plate 3-2 are deformed, a preload is applied to the preload spring 5-1 before it is installed to make it in a compressed state, thereby increasing the initial friction force of the sliding friction to achieve the ability of the damper to alternately consume energy. The preload spring 5-1 is in a compressed state under the preload force and there is still a certain amount of compression, so as to provide a rebound force for the friction surface between the friction part of the first friction clamp plate 1-1 and the first friction tension plate 2-1 after misalignment. When the earthquake just occurs, the metal upper cover plate 3-1, the metal upper cover plate 3-2 and the deformation energy dissipation component 4 are deformed, while the first friction tension plate 2-1 and the first friction clamp plate 1-1 do not slide relative to each other. Subsequently, the metal upper cover plate 3-1, the metal lower cover plate 3-2 and the deformation energy dissipation component 4 stop deforming, and the first friction tension plate 2-1 and the first friction clamp plate 1-1 slide relative to each other. The schematic diagram of the change of the friction part when it is axially pulled is shown in FIG. Figure 4 shown.

[0040] It should be noted that when the friction part slides, due to structural limitations, the displacement of the open end of the first friction clamping plate 1-1 is larger than that of the closed end. In this embodiment, the design material of the first friction clamping plate 1-1 should be selected from materials with better shear resistance; in addition, a pre-stressed spring 5-1 with different elastic modulus should be selected or a disc spring or other elastic materials or structures should be used according to the distance between the center axis of the countersunk long hole and the open end of the first friction clamping plate 1-1.

[0041] In this embodiment, the deformation energy dissipation component 4 is a disc spring component, and the number of the disc spring components is multiple. The two groups of first friction plates 2-1 and second friction plates 2-2 are coaxially arranged, and each group of disc spring components 4 is symmetrically arranged in the accommodation space about the axis of the first friction plate 2-1 and the second friction plate 2-2, and each group of bolt holes 7-1, high-strength bolts 5 and countersunk long holes are also symmetrically arranged about the axis of the first friction plate 2-1 and the second friction plate 2-2. The movement of the deformation energy dissipation component 4 from axial tension to axial compression is as shown in FIG. Figure 7 shown.

[0042] like Figure 5 , 6 As shown, in this embodiment, the disc spring assembly 4 includes a disc spring 4-2 and a loading head 4-1 and a moving part 4-3 respectively arranged at both ends thereof, the two ends of the disc spring 4-2 are respectively embedded in the loading head 4-1 and the moving part 4-3, a stud 4-4 is fixed on the end surface of the moving part 4-3, and the adjacent ends of the two groups of first friction plates 2-1 and second friction plates 2-2 are respectively provided with embedding grooves for embedding the loading head 4-1 and screw holes for mounting with the studs. The main body of the moving part 4-3 is a solid steel rod with a circular steel plate on the top and a bolt head on the bottom. The size of the circular steel plate is adapted to the space size within the design of the loading head 4-1 inlay. A circular steel plate with a radius larger than the radius of the disc spring segment of the loading head 4-1 is welded to the steel rod at a distance beyond the lower end of the loading head 4-1, wherein the portion of the circular steel plate exceeding the radius of the disc spring segment of the head is designed to be a circular ring protruding toward the loading head 4-1; the two circular steel plates of the moving part 4-3 corresponding to the disc spring 4-2 are both designed to be protruding circular rings, so that when subjected to axial tension or axial compression, the disc spring is in a compressed state.

[0043] In this embodiment, the connecting portion 6 is a connecting ring, which can be conveniently connected to the building component through the connecting ring.

[0044] Embodiment 2

[0045] like Figure 8 As shown, in order to increase the maximum stroke allowed by the damper during earthquake action, this embodiment provides a connecting plate 8 between the two first friction plates 2-1 and the second friction plates 2-2.

[0046] The structure of the connecting plate 8 can be simply regarded as the connecting parts of the two first friction plates 2-1 and the second friction plates 2-2, and then the cross sections are connected. It should be noted that when the connecting plate 8 is installed, the end with the threaded hole must correspond to the first friction plate 2-1 with the embedding groove, and the end with the embedding groove must correspond to the second friction plate 2-2 with the threaded hole.

[0047] The number of connecting plates 8 may not be unique. If the earthquake resistance of the building needs to be improved, the number of connecting plates 8 may be appropriately increased. The length of the connecting plates 8 should not be too long, and the length of the connecting plates 8 should be appropriately reduced as the number of connecting plates 8 increases, in order to reduce the cost of the damper.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A metal variable friction composite damper, characterized in that: include: At least two groups of friction plates and friction clamps, a metal upper cover plate, a metal lower cover plate and at least one group of deformation energy dissipation components, the thickness of the end of the friction plate is greater than the thickness of the middle, the friction clamp is provided with a mounting groove adapted to the side shape of the friction plate, one end of the friction plate is installed in cooperation with the mounting groove and can generate sliding friction along the mounting groove after being subjected to force, a plurality of high-strength bolts pass through the friction clamp and limit one end of the friction plate to the inner side thereof, a pre-stressed spring is installed at the end of the high-strength bolt, and a connecting portion that is connected to the building component is provided at the end of the friction clamp; A bolt hole is provided at the other end of the friction pull plate, the metal upper cover plate and the metal lower cover plate are arranged relative to each other to form a receiving space, the two sides of the metal upper cover plate and the metal lower cover plate are respectively connected with the two groups of the bolt holes on the friction pull plates through connecting bolts, and the deformation energy dissipation component is arranged in the receiving space between the metal upper cover plate and the metal lower cover plate.

2. The metal variable friction composite damper according to claim 1, characterized in that: The metal upper cover plate and the metal lower cover plate are both C-shaped and are respectively arranged on the upper side and the lower side of the adjacent parts of the two groups of friction pull plates.

3. The metal variable friction composite damper according to claim 1, characterized in that: The deformation energy dissipation components are disc spring components, which are in multiple groups.

4. The metal variable friction composite damper according to claim 3, characterized in that: The two groups of friction plates are coaxially arranged, and each group of disc spring components is symmetrically arranged in the accommodating space about the axis of the friction plates.

5. The metal variable friction composite damper according to claim 3, characterized in that: The disc spring assembly includes a disc spring and a loading head and a moving part respectively arranged at both ends of the disc spring. The two ends of the disc spring are respectively embedded in the loading head and the moving part. A stud is fixed on the end surface of the moving part. The adjacent ends of the two groups of friction pull plates are respectively provided with an embedding groove for embedding the loading head and a screw hole for mounting with the stud.

6. The metal variable friction composite damper according to claim 1, characterized in that: The thickness of the part of the friction plate extending into the inner part of the friction clamping plate gradually increases from the middle to both sides, and the contact surfaces of the friction plate and the friction clamping plate are matched serrated friction surfaces.

7. The metal variable friction composite damper according to claim 1, characterized in that: A plurality of groups of countersunk long holes are arranged on both sides of the surface of the friction clamp plate, and a plurality of high-strength bolts pass through the countersunk long holes respectively and are fastened therewith by nuts. The plurality of high-strength bolts cooperate to limit one end of the friction pull plate to its inner side.

8. The metal variable friction composite damper according to claim 7, characterized in that: The pre-compression spring is located at the inner side of the nut, and after the pre-compression spring is installed, a pre-compression force is applied to the nut so that the nut is in a compressed state.

9. The metal variable friction composite damper according to claim 1, characterized in that: When an earthquake just occurs, the metal upper cover plate, the metal lower cover plate and the deformation energy dissipation component are deformed while the friction plate and the friction clamp plate do not slide relative to each other. Subsequently, the metal upper cover plate, the metal lower cover plate and the deformation energy dissipation component stop deforming, and the friction plate and the friction clamp plate slide relative to each other.

10. The metal variable friction composite damper according to claim 1, characterized in that: The connecting portion is a connecting ring.

Images