Damping device

Abstract

The utility model relates to the technical field of energy dissipation and shock absorption of engineering structures, in particular to a damping device which comprises a bearing mechanism, an upper cover plate and a lower cover plate with the same size specification as the upper cover plate. The movable mechanism comprises a fixed plate arranged between the upper cover plate and the lower cover plate, and a friction plate also arranged between the upper cover plate and the lower cover plate; the fastening mechanism comprises a plurality of fastening bolts arranged on the upper cover plate and a plurality of nuts matched with the fastening bolts; according to the utility model, different SMA wire bundle quantity ratios can be matched by controlling the pre-tightening force of the bolt and the sliding resistance, so that the maximum energy-dissipating capacity can be fully exerted on the basis of ensuring that a structural system has the self-resetting capacity, the sliding resistance can be adjusted, and the self-resetting force of the structural system can be adjusted. The hysteresis curve is not rectangular any more, the rigidity of the structure is effectively improved, and the situation that the energy consumption form is single is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of energy dissipation and shock absorption of engineering structures, in particular to a damping device. Background Art

[0002] The traditional seismic design concept aims to strengthen the energy dissipation and deformation capacity of the structure, dissipate the earthquake energy in time, and increase the displacement deformation limit that the structure can withstand to resist the earthquake. However, according to the earthquake damage statistics that have occurred around the world in recent decades, even if the structure with sufficient energy dissipation and deformation capacity does not collapse in the first earthquake, it will leave a large residual displacement, which is not only unusable but also more likely to be damaged in aftershocks. The performance-based seismic design concept pays more attention to the recovery capacity of the structure after the earthquake, and the seismic design concept has shifted from seismic shock reduction to post-earthquake performance recovery design. In order to enhance the self-reset performance of the structure while ensuring the energy dissipation capacity of the structure, the use of components with self-reset performance in the structure to passively control the deformation, such as adding dampers and energy-dissipating supports in the structure, is an effective, reliable and economical shock reduction method in structural shock control technology.

[0003] Displacement-related dampers mainly include friction dampers, which are widely used due to their strong energy dissipation capacity, low price, and easy installation. Traditional friction dampers also have some problems, such as the inability to adjust the sliding resistance, the rectangular hysteresis curve, the inability to improve the stiffness of the structure, and the single energy dissipation form. Utility Model Content

[0004] In view of the problems in the above or prior art that the sliding resistance cannot be adjusted, the hysteresis curve is rectangular, the rigidity of the structure cannot be improved, and the energy consumption form is single, the present utility model is proposed.

[0005] Therefore, an object of the present invention is to provide a damping device.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: including, a bearing mechanism, including an upper cover plate, and a lower cover plate with the same size specifications as the upper cover plate; a movable mechanism, including a fixed plate arranged between the upper cover plate and the lower cover plate, and a friction plate also arranged between the upper cover plate and the lower cover plate; a fastening mechanism, including a plurality of fastening bolts arranged on the upper cover plate, and a plurality of nuts adapted to the fastening bolts; an adjusting mechanism, including a wire rope arranged on the fixed plate, and a pre-tensioning anchor arranged on the fixed plate and the friction plate; wherein the relative positions of the fixed plate, the upper cover plate and the lower cover plate are fixed, and the friction plate can move within a limited range between the upper cover plate and the lower cover plate.

[0007] As a preferred solution of the damping device of the utility model, wherein: the upper cover plate and the lower cover plate are both provided with bolt holes, and the upper cover plate and the lower cover plate can press the fixing plate tightly through a fastening mechanism.

[0008] As a preferred solution of the damping device of the utility model, wherein: the fixed plate and the friction plate are both provided with a plurality of first circular holes along the first direction, the fixed plate is provided with a first central through channel along the second direction, the friction plate is also provided with a long slot along the first direction, and the friction plate is provided with a second central through channel along the second direction; wherein the first central through channel and the second central through channel have the same size specifications, and the limited range is the length range of the long slot.

[0009] As a preferred solution of the damping device of the utility model, the wire bundle rope is made of shape memory alloy SMA wire bundle.

[0010] As a preferred solution of the damping device of the utility model, wherein: the wire rope can pass through the first through hole and the second through hole.

[0011] As a preferred solution of the damping device of the utility model, the contact surfaces of the friction plate and the upper cover plate and the lower cover plate are polished and rust-removed, which can avoid wear caused by uneven sliding friction surfaces and thus change in sliding friction force.

[0012] As a preferred solution of the damping device of the utility model, wherein: the wire rope passes through the first through hole and the second through hole and is anchored on the fixing plate and the friction plate respectively through the pre-tensioning anchor.

[0013] In order to solve the above technical problems, the utility model also provides the following technical solutions: a pre-tension adjustment method, including a damping device, and step one: measuring the relationship between torque and bolt tension; step two: calculating the sliding friction force through a formula; step three: controlling the adjustment of the pre-tension by adjusting the tightening bolt.

[0014] As a preferred solution of the pre-tension adjustment method of the utility model, the calculation formula is as follows:

[0015] T=KF0d→F0=T / Kd

[0016] N b v =0.9n f μF0

[0017] Where T is the tightening torque, the unit is N·m; K is the tightening torque coefficient; F0 is the pre-tension, the unit is N; d is the nominal diameter of the thread, the unit is mm; N b v Indicates the shear bearing capacity of the preloaded bolt; nf It represents the number of force-transmitting friction surfaces; μ represents the anti-slip coefficient of the friction surface.

[0018] As a preferred solution of the pre-tension adjustment method of the utility model, it also includes: applying butter on the sliding friction surface to delay the damage of the friction surface.

[0019] The beneficial effects of the utility model are as follows: the utility model can match different SMA wire bundle quantity ratios by controlling the pre-tightening force of the bolts and the sliding resistance, thereby achieving full play of the maximum energy consumption capacity on the basis of ensuring that the structural system has the self-resetting ability, so that the utility model can adjust the sliding resistance, and the hysteresis curve is no longer rectangular, which effectively improves the rigidity of the structure and avoids a single energy consumption form. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is the overall schematic diagram of the damping device.

[0022] Figure 2 It is a schematic diagram of the structure of the lower part of the upper cover plate of the damping device.

[0023] Figure 3 It is a perspective diagram of the overall structure of the damping device.

[0024] Figure 4 It is a perspective diagram of the structure of the fixed plate and friction plate of the damping device.

[0025] Figure 5 Schematic diagram of the superelasticity of shape memory alloy.

[0026] Figure 6 3D schematic diagram of SMA characteristics. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Example 1, reference Figures 1 to 6 , which is the first embodiment of the utility model, and provides a damping device, which includes a bearing mechanism 100, including an upper cover plate 101, and a lower cover plate 102 with the same size and specification as the upper cover plate 101; a movable mechanism 200, including a fixing plate 201 arranged between the upper cover plate 101 and the lower cover plate 102, and a friction plate 202 also arranged between the upper cover plate 101 and the lower cover plate 102; a fastening mechanism 300, including a plurality of fastening bolts 301 arranged on the upper cover plate 101, wherein the fastening bolts 301 are provided below There are disc washers to prevent the fastening bolts 301 from loosening, and multiple nuts 302 adapted for the fastening bolts 301; the adjustment mechanism 400 includes a wire rope 401 arranged on the fixed plate 201, the material of the wire rope 401 is a shape memory alloy SMA wire bundle, and a pre-tensioned anchor 402 arranged on the fixed plate 201 and the friction plate 202; wherein, the relative position of the fixed plate 201 and the upper cover plate 101 and the lower cover plate 102 is fixed, and the friction plate 202 can move within a limited range between the upper cover plate 101 and the lower cover plate 102.

[0031] Specifically, bolt holes 101 a are provided on the upper cover plate 101 and the lower cover plate 102 , and the upper cover plate 101 and the lower cover plate 102 can press the fixing plate 201 together through the fastening mechanism 300 .

[0032] Furthermore, the fixed plate 201 and the friction plate 202 are both provided with a plurality of first circular holes 201a along the first direction, the fixed plate 201 is provided with a first central through hole 201b along the second direction, the friction plate 202 is also provided with a long slot 202a along the first direction, and the friction plate 202 is provided with a second central through hole 202b along the second direction; wherein the first central through hole 201b and the second central through hole 202b have the same size specifications, and the limited range is the length range of the long slot 202a.

[0033] The first direction is set as the thickness direction of the fixing plate 201 and the friction plate 202 , and the second direction is set as the long side direction of the fixing plate 201 and the friction plate 202 .

[0034] Preferably, the contact surfaces of the friction plate 202 and the upper cover plate 101 and the lower cover plate 102 are polished and rust-removed, so as to avoid the wear caused by the unevenness of the sliding friction surface and thus the change of the sliding friction force.

[0035] It should be noted that the tow rope 401 can pass through the first through hole 201b and the second through hole 202b.

[0036] When in use, the tow rope 401 passes through the first through hole 201 b and the second through hole 202 b and is anchored on the fixing plate 201 and the friction plate 202 respectively through the pre-tensioning anchor 402 .

[0037] During use, the pre-tightening force of the fastening bolt 301 and the sliding resistance can be controlled to match different SMA bundle quantity ratios, thereby ensuring that the structural system has the self-resetting ability and fully exerting the maximum energy consumption capacity. The damper realizes the self-resetting performance of the connection node and enhances the energy consumption capacity of the structure. The utility model has a simple structure, low manufacturing cost, convenient installation and disassembly, meets the assembly requirements, and is suitable for mass production.

[0038] Example 2, reference Figures 1 to 6 , which is the second embodiment of the utility model. Different from the previous embodiment, this embodiment provides a pre-tension adjustment method, which includes the above-mentioned damping device, and also includes, step one: determining the relationship between torque and bolt tension; step two: calculating the sliding friction force through a calculation formula; step three: controlling the adjustment of the pre-tension by adjusting the fastening bolt 301.

[0039] Specifically, the above calculation formula is as follows:

[0040] T=KF0d→F0=T / Kd

[0041] N b v =0.9n f μF0

[0042] Where T is the tightening torque, the unit is N·m; K is the tightening torque coefficient; F0 is the pre-tension, the unit is N; d is the nominal diameter of the thread, the unit is mm; N b v Indicates the shear bearing capacity of the preloaded bolt; n f It represents the number of force-transmitting friction surfaces; μ represents the anti-slip coefficient of the friction surface.

[0043] Furthermore, applying butter on the sliding friction surface can delay damage to the friction surface.

[0044] Furthermore, the friction plate 202 and the fixing plate 201 are connected in opposite directions to the use ends, and their connection holes are connected to the node plate through pins.

[0045] The rest of the structure is the same as that of Example 1.

[0046] When in use, first prepare the torque measuring instrument, bolt tension measuring instrument and related test samples, install the bolt to be tested on an appropriate device, and ensure that its stress condition meets the experimental requirements, use the torque measuring instrument to apply torque to the bolt, and record the corresponding torque value, use the bolt tension measuring instrument to perform tension test on the bolt, and record the corresponding tension value, process the measured torque and bolt tension data to obtain the relationship between them, and calculate the sliding friction value according to the above calculation formula using the measured torque and bolt tension data to ensure that the calculation process is accurate to obtain an accurate sliding friction value, and according to the calculated sliding friction value, control and adjust the bolt pre-tension by adjusting the tightening bolt to ensure that the adjustment process is carried out step by step as required to avoid excessive or insufficient pre-tension from affecting the results. In actual use, you can take measures to apply butter on the sliding friction surface to delay the damage of the friction surface, select the appropriate type of butter, and apply it according to the actual situation to ensure that its coverage is wide and uniform.

[0047] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0048] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0049] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0050] 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 preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A damping device, characterized in that: include, The bearing mechanism (100) comprises an upper cover plate (101) and a lower cover plate (102) having the same size and specification as the upper cover plate (101); The movable mechanism (200) comprises a fixing plate (201) disposed between the upper cover plate (101) and the lower cover plate (102), and a friction plate (202) also disposed between the upper cover plate (101) and the lower cover plate (102); A fastening mechanism (300) comprising a plurality of fastening bolts (301) arranged on the upper cover plate (101), and a plurality of nuts (302) adapted to fit the fastening bolts (301); An adjustment mechanism (400) comprises a wire rope (401) arranged on the fixing plate (201), and a pre-tensioning anchor (402) arranged on the fixing plate (201) and the friction plate (202); The relative positions of the fixing plate (201) and the upper cover plate (101) and the lower cover plate (102) are fixed, and the friction plate (202) is movable within a limited range between the upper cover plate (101) and the lower cover plate (102).

2. The damping device according to claim 1, characterized in that: Bolt holes (101a) are provided on both the upper cover plate (101) and the lower cover plate (102), and the upper cover plate (101) and the lower cover plate (102) can press the fixing plate (201) tightly through a fastening mechanism (300).

3. The damping device according to claim 1 or 2, characterized in that: The fixing plate (201) and the friction plate (202) are both provided with a plurality of first circular holes (201a) along a first direction, the fixing plate (201) is provided with a first central through hole (201b) along a second direction, the friction plate (202) is also provided with a long notch (202a) along the first direction, and the friction plate (202) is provided with a second central through hole (202b) along the second direction; The first through hole (201b) and the second through hole (202b) have the same size specifications, and the limited range is the length range of the long slot (202a).

4. The damping device according to claim 3, characterized in that: The wire bundle rope (401) is made of shape memory alloy SMA wire bundle.

5. The damping device according to claim 4, characterized in that: The wire bundle rope (401) can pass through the first through hole (201b) and the second through hole (202b).

6. The damping device according to claim 4 or 5, characterized in that: The contact surfaces of the friction plate (202) and the upper cover plate (101) and the lower cover plate (102) are all polished and rust-removed, thereby avoiding wear caused by uneven sliding friction surfaces and thus preventing changes in sliding friction force.

7. The damping device according to claim 6, characterized in that: The wire rope (401) passes through the first central through hole (201b) and the second central through hole (202b) and is anchored on the fixing plate (201) and the friction plate (202) respectively through the pre-tensioning anchor (402).

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