CN213358998U - Diamond rotary friction damper - Google Patents
Diamond rotary friction damper Download PDFInfo
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- CN213358998U CN213358998U CN202021868171.3U CN202021868171U CN213358998U CN 213358998 U CN213358998 U CN 213358998U CN 202021868171 U CN202021868171 U CN 202021868171U CN 213358998 U CN213358998 U CN 213358998U
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Abstract
The utility model discloses a diamond-shaped rotary friction damper, which comprises two damping units, wherein each damping unit comprises a rotating rod A, a rotating rod B, a rotating shaft A for rotatably connecting the rotating rod A and the rotating rod B, and a friction plate clamped and fixed between the rotating rod A and the rotating rod B, and the rotating shaft A is provided with a pressure applying assembly for adjusting the pretightening force of the damping unit; the two rotating rods A and the two rotating rods B are spliced to form a diamond structure, the two rotating rods A are arranged in parallel, and the two rotating rods B are arranged in parallel; the damper further comprises two rotating shafts B, through holes capable of penetrating the rotating shafts A and through holes capable of penetrating the rotating shafts B are formed in the two ends of the rotating rod A and the two ends of the rotating rod B respectively, the two rotating shafts A are installed on the two opposite vertexes of the diamond structure respectively, and the two rotating shafts B are installed on the other two opposite vertexes of the diamond structure respectively. The damper can be used as an energy dissipation device for a building structure, and can reduce the damage of earthquake force to the building structure in the earthquake.
Description
Technical Field
The utility model belongs to the technical field of building engineering, concretely relates to rhombus rotational friction damper.
Background
Earthquake is a natural phenomenon from the movement of the internal structure of the earth, when the earthquake occurs, the rock body in the earth is broken and the dislocation and slippage generate vibration, namely earthquake waves, and the ground movement caused by the propagation of the earthquake waves is called earthquake movement. The earthquake motion can generate huge energy to act on the building, so that the bearing capacity of the structure is insufficient or the structure is deformed too much to cause damage, which is the most important reason for the loss of life and property caused by the earthquake. In a seismic event, the input vibrational energy from ground acceleration is converted into kinetic and potential energy, which must be absorbed or volatilized by heat. However, for strong earthquakes, most of the input energy will be absorbed by hysteresis, i.e. release is obtained by structural destruction.
Thus, for modern buildings, the most common method of protecting buildings from earthquakes is to increase the stiffness. However, this method is not always effective, particularly when its stiffness value is in resonance with the seismic action, not only does it not mitigate the seismic action, but it increases the structural damage. In order to solve this problem, it is necessary to develop energy dissipaters (such as dampers) that can be applied to building structures to absorb energy and reduce the stress and strain generated by earthquakes, thereby reducing the displacement and damage of the structures.
Disclosure of Invention
The to-be-solved technical problem of the utility model is, overcome prior art and mainly come the shortcoming of power consumption through increasing building structure own rigidity, provide rhombus rotational friction attenuator, this attenuator can be applied to building structure as energy dissipater, arouses when building structure takes place big side and moves at the earthquake, and the accessible attenuator reaches the effect of consuming the energy that the structure warp and produce, increases building structure's bulk rigidity to reduce the harm that the earthquake power caused to building structure.
In order to achieve the above object, the utility model discloses a technical scheme be:
a rhombic rotating friction damper comprises two damping units, wherein each damping unit comprises a rotating rod A, a rotating rod B, a rotating shaft A for rotatably connecting the rotating rod A and the rotating rod B, and a friction plate clamped and fixed between the rotating rod A and the rotating rod B, and a pressing assembly for adjusting the pretightening force of the damping units is installed on the rotating shaft A; the two rotating rods A and the two rotating rods B are spliced to form a diamond structure, the two rotating rods A are arranged in parallel, and the two rotating rods B are arranged in parallel; the attenuator still includes two and is used for rotating the connection dwang A with dwang B's pivot B, dwang A both ends with dwang B both ends are seted up respectively and are worn to establish pivot A's through-hole with can wear to establish pivot B's through-hole, two pivot A install respectively in two relative summits of rhombus structure, two pivot B install respectively in two relative summits in addition of rhombus structure.
Preferably, the friction plate is provided with a through hole for penetrating through the rotating shaft A, and the friction plate is sleeved on the rotating shaft A.
Preferably, the friction plate is a circular ring friction plate, and an inner ring hole of the circular ring friction plate is sleeved on the rotating shaft A; the surface of the rotating rod A and/or the surface of the rotating rod B are provided with mounting grooves for placing the friction plates.
Preferably, pivot A establishes to the screw rod of bolt, dwang A dwang B with but the friction disc has all been seted up and has been worn to establish the through-hole of screw rod, the screw rod passes dwang A friction disc with threaded connection fixation nut behind the through-hole of dwang B.
Preferably, the pressure applying assembly comprises a resilient member in a compressed state; the elastic component is arranged on the nut of the bolt and is adjacent to the nut of the bolt, or the elastic component is arranged between the rotating rod A and the rotating rod B, or the elastic component is arranged on the fixing nut and is adjacent to the fixing nut, and the rotating rod A or the rotating rod B is arranged between the fixing nut and the rotating rod A or the rotating rod B.
Preferably, the pressing assembly includes two elastic members in a compressed state, one of the elastic members is disposed between the nut of the bolt and the adjacent rotating rod a or B, and the other elastic member is disposed between the fixing nut and the adjacent rotating rod a or B.
Preferably, the elastic part is a spring washer and a hard washer arranged between the spring washer and the rotating rod A or the rotating rod B adjacent to the spring washer, and the spring washer and the hard washer are all sleeved on the rotating shaft A.
Preferably, the initial included angle between the rotating rod A and the rotating rod B which are connected with the same rotating shaft ranges from 80 degrees to 100 degrees; the pre-tightening force of the rhombic rotary friction damper is 62 kN-125 kN.
Preferably, the maximum rotary arm length of the rhombic rotary friction damper is 200-1200 mm; the diameter of friction disc is 150 ~ 320mm, and thickness is 3 mm.
Preferably, the friction plate is an aluminum magnesium alloy friction plate, and the rotating rod a and the rotating rod B are both made of steel plates.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect: the rhombic rotating friction damper can be applied to a building structure as an energy dissipation device, can drive the damper to rotate when the building structure is subjected to large lateral movement caused by an earthquake, can generate friction force to achieve the purpose of dissipating energy, concentrates the energy dissipation on the damper, achieves the effect of dissipating the energy generated by structural deformation through the mutual friction between a rotating rod and a friction plate of a damping unit, increases the overall rigidity of the building structure, and reduces the damage of the earthquake force to the building structure. In this attenuator, dwang A, dwang B and the friction disc connected through pivot A constitute a damping unit for this attenuator constitutes two damping units that set up relatively, can improve the gliding force of attenuator, and the pretightning force of accessible subassembly adjustment attenuator that exerts pressure, combines the initial contained angle adjustment of dwang A and dwang B of attenuator, can make this attenuator reach different gliding forces that play, in order to satisfy different power consumption demands.
Drawings
FIG. 1 is a schematic structural view of a diamond-shaped rotary friction damper according to the present embodiment;
FIG. 2 is a schematic exploded view of the diamond-shaped rotary friction damper of the present embodiment;
FIG. 3 is a front view of the diamond-shaped rotary friction damper of the present embodiment;
FIG. 4 is a schematic view showing the structure of a damper of a comparative example;
fig. 5 is a disassembled schematic view of the damper of the comparative sample.
Detailed Description
The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
It should be noted that in the description of the present invention, the terms "inside", "outside", "upper", "lower", "left", "right", "front", "rear", etc. indicate the positional relationship based on the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 3, a rhombic rotating friction damper comprises two damping units, each damping unit comprises a rotating rod a1, a rotating rod B2, a rotating shaft A3 for rotatably connecting the rotating rod a1 and the rotating rod B2, and a friction plate 6 clamped and fixed between the rotating rod a1 and the rotating rod B2, wherein a pressing assembly for adjusting the pretightening force of the damping unit is installed on the rotating shaft a 1; the two rotating rods A1 and the two rotating rods B2 are spliced to form a diamond structure, the two rotating rods A1 are arranged in parallel, and the two rotating rods B2 are arranged in parallel; the attenuator still includes two and is used for rotating the connection dwang A1 with the pivot B8 of dwang B2, dwang A1 both ends with dwang B2 both ends are seted up respectively and are worn to establish pivot A3 the through-hole with can wear to establish pivot B8's through-hole, two pivot A3 install respectively in two relative summits of rhombus structure, two pivot B8 install respectively in two other relative summits of rhombus structure.
The rhombic rotating friction damper is applied to a building structure as an energy dissipater, when the building structure is subjected to large lateral movement caused by an earthquake, the rotating rod A1 and the rotating rod B2 of the damper can be driven to rotate relatively, the effect of consuming energy generated by structural deformation is achieved through mutual friction between the rotating rod (the rotating rod A1 and the rotating rod B2) and the friction plate 6, the energy consumption is concentrated on the damper, the integral rigidity of the building structure is increased, and therefore the damage of earthquake force to the building structure is reduced. In the damper, the rotating rod A1, the rotating rod B2 and the friction plate 6 positioned between the rotating rod A8932 and the rotating rod B2 which are connected through the same rotating shaft A can form a damping unit, the damper comprises two damping units, the sliding force of the damper can be improved, the pretightening force of the damper can be adjusted through the pressing assembly, and the damper can achieve different sliding forces by combining the adjustment of the initial included angle of the rotating rod A1 and the rotating rod B2 of the damper, so that different energy consumption requirements can be met.
Specifically, the friction plate 6 is provided with a through hole for penetrating through the rotating shaft A3, and the friction plate is sleeved on the rotating shaft A3.
Specifically, the friction plate 6 is a circular ring friction plate, and an inner ring hole of the circular ring friction plate is sleeved on the rotating shaft a 3; the surface of the rotating rod A1 and/or the rotating rod B2 is provided with a mounting groove for placing the friction plate, so that the friction plate 6 can be conveniently positioned and mounted.
Specifically, pivot A3 establishes to the screw rod 32 of bolt, dwang A1 dwang B2 with friction disc 6 has all been seted up and has been passed and to be established the through-hole of screw rod 32, the screw rod 32 passes dwang A1 friction disc 6 with threaded connection fixation nut 7 behind the through-hole of dwang B2. The damper adopting the structure has simple structure and flexible arrangement, and each part of the component can be detached independently, thereby being convenient for the replacement and maintenance of the rotary friction damper during service.
Specifically, the pressing assembly comprises an elastic component in a compressed state; the elastic component is arranged between the nut 31 of the bolt and the rotating rod A1 or the rotating rod B2 adjacent to the nut, or the elastic component is arranged between the fixing nut 7 and the rotating rod A1 or the rotating rod B2 adjacent to the fixing nut.
Besides the above arrangement, the pressing assembly can be arranged as follows: the pressure applying assembly comprises two elastic parts in a compression state, wherein one elastic part is arranged between a nut 31 of the bolt and the rotating rod A1 or the rotating rod B2 adjacent to the nut, and the other elastic part is arranged between the fixing nut 7 and the rotating rod A1 or the rotating rod B2 adjacent to the fixing nut. For example, as shown in fig. 2, two elastic members of the pressing assembly mounted on the upper rotating shaft a are respectively disposed between the nut 31 and the rotating rod a1 adjacent thereto, and between the fixing nut 7 and the rotating rod B2 adjacent thereto; two elastic parts of the pressing component arranged on the lower rotating shaft A1 are respectively arranged between the nut 31 of the bolt and the rotating rod B2 adjacent to the nut, and between the fixing nut 7 and the rotating rod A1 adjacent to the fixing nut.
The pressing assembly adopts the two structures, and the compression condition of the elastic component can be changed by adjusting the position of the fixing nut 7, so that the pre-tightening force (namely the pre-tightening force of the bolt) of the damping unit can be adjusted.
Specifically, as shown in fig. 2, the elastic component is a spring washer 4, and a hard washer 5 is arranged between the spring washer 4 and the rotating rod a1 or the rotating rod B2 adjacent to the spring washer 4, and both the spring washer 4 and the hard washer 5 are sleeved on the rotating shaft A3.
Specifically, the friction plate 6 is a high-friction plate, preferably an aluminum magnesium alloy friction plate, and the rotating rod a and the rotating rod B are both of a steel plate structure; the bolts are high-strength bolts.
Specifically, the initial included angle between the rotating rod A1 and the rotating rod B2 which are connected with the rotating shaft ranges from 80 degrees to 100 degrees; the inventor finds that the change of the initial included angle of the damper has a large influence on the friction force of the rotary friction damper in the experimental process, the friction force has a trend of increasing along with the increase of the initial included angle, when the initial angle is increased from 90 degrees to 120 degrees, the friction force is increased to a large value, but the increase of the initial angle is not infinite, and the asymmetry of the hysteretic curve of the damper is more and more obvious along with the increase of the initial included angle. That is, the damper stroke becomes small due to the excessively large or small initial angle, and the requirement for seismic fortification cannot be satisfied, and the initial angle becomes small, the rotational friction of the output damper is also small, and it is not preferable to use a damper having an excessively small angle from the viewpoint of economy, and the initial angle range is preferably 80 ° to 100 °.
Specifically, the pretightening force of the rotary friction damper is 62 kN-125 kN.
Specifically, the maximum rotary arm length of the rotary friction damper is 200-1200 mm. The inventor finds in the experimental process that the friction force of the damper is gradually reduced along with the increase of the rotating arm length, the change of the arm length and the friction force is not in a linear relation, and the friction force can not be obviously changed when the arm length is increased after reaching a certain length, so that the optimal range of the maximum rotating arm length of the rotating friction damper is 200-1200 mm.
Specifically, the diameter of the friction plate 6 is 150-320 mm, and the thickness is 3 mm.
EXAMPLE 1 damper rotational Friction test
Test samples: the pivot lever a1 and pivot lever B2 of the diamond-shaped rotary friction damper shown in fig. 1 and 2 are each formed of a straight steel plate having the same dimensions and shape, and the damper arm length L is set to 200mm (as shown in fig. 3), and the inner ring radius R of the annular friction surface is set to be equal to the inner ring radius R of the annular friction surface112.5mm, outer ring radius R275mm, friction coefficient mu 0.3, pretensionForce Fsl80kN, 90 degrees as the initial included angle theta, and the loading displacement epsilon-30 mm and 30mm]Decreasing the angle is positive loading.
Comparative sample: the L-shaped rotary friction damper shown in fig. 4 and 5 includes two rotary levers a1, a rotary lever B2, two friction plates 6 and a rotary shaft A3; through holes used for penetrating through the rotating shaft A3 are formed in the end portions of one end of the rotating rod A1 and one end of the rotating rod B2, the rotating rod A1 is rotatably connected with the rotating rod B2 through the rotating shaft A3, the two rotating rods A1 are respectively arranged on two sides of the rotating rod B2, and one friction plate 6 is fixedly clamped between the adjacent rotating rod A1 and the adjacent rotating rod B2; still install in the pivot 3 and be used for adjusting the subassembly of exerting pressure of the pretightning force of rotation friction damper, subassembly, pivot A, dwang A1, dwang B2, damper arm length, friction surface size, coefficient of friction, pretightning force, initial contained angle and loading displacement of exerting pressure are the same with the experiment sample.
The experimental method comprises the following steps: in the test, a 100kN MTS hydraulic servo actuator is adopted to implement low-cycle horizontal reciprocating loading, displacement loading control is adopted, the friction force of an experimental sample and a comparison sample is measured through a force sensor on the actuator, the sliding displacement of a damper is measured through a displacement meter, and the variation of the pretightening force of the high-strength bolt is measured through a 200kN pressure sensor.
The friction force of the rotational damping was measured and the results are shown in the following table:
the comparison sample and the experiment sample comprise two damping units, and the rotation friction force ratio of the comparison sample to the experiment sample is 1:2, namely the experiment sample can provide larger sliding force and improve the damping effect through the optimization of the combination form of the damping units.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The rhombic rotating friction damper is characterized by comprising two damping units, wherein each damping unit comprises a rotating rod A, a rotating rod B, a rotating shaft A and a friction plate, wherein the rotating shaft A is used for rotatably connecting the rotating rod A and the rotating rod B, the friction plate is fixedly clamped between the rotating rod A and the rotating rod B, and the rotating shaft A is provided with a pressing assembly used for adjusting the pretightening force of the damping unit; the two rotating rods A and the two rotating rods B are spliced to form a diamond structure, the two rotating rods A are arranged in parallel, and the two rotating rods B are arranged in parallel; the attenuator still includes two and is used for rotating the connection dwang A with dwang B's pivot B, dwang A both ends with dwang B both ends are seted up respectively and are worn to establish pivot A's through-hole with can wear to establish pivot B's through-hole, two pivot A install respectively in two relative summits of rhombus structure, two pivot B install respectively in two relative summits in addition of rhombus structure.
2. The diamond-shaped rotary friction damper according to claim 1, wherein the friction plate is provided with a through hole for penetrating the rotating shaft a, and the friction plate is sleeved on the rotating shaft a.
3. The diamond-shaped rotary friction damper according to claim 2, wherein the friction plate is a circular ring-shaped friction plate, and an inner ring hole of the circular ring-shaped friction plate is sleeved on the rotating shaft A; the surface of the rotating rod A and/or the surface of the rotating rod B are provided with mounting grooves for placing the friction plates.
4. The diamond-shaped rotary friction damper according to claim 1, wherein the rotary shaft a is a screw rod of a bolt, the rotary rod a, the rotary rod B and the friction plate are all provided with through holes through which the screw rod can be inserted, and the screw rod passes through the through holes of the rotary rod a, the friction plate and the rotary rod B and then is connected with a fixing nut through threads.
5. The diamond shaped rotary friction damper according to claim 4, wherein said biasing assembly includes a resilient member in compression; the elastic component is arranged on the nut of the bolt and is adjacent to the nut of the bolt, or the elastic component is arranged between the rotating rod A and the rotating rod B, or the elastic component is arranged on the fixing nut and is adjacent to the fixing nut, and the rotating rod A or the rotating rod B is arranged between the fixing nut and the rotating rod A or the rotating rod B.
6. The diamond-shaped rotational friction damper according to claim 4, wherein the pressing assembly comprises two elastic members in a compressed state, one of the elastic members is disposed between the nut of the bolt and the adjacent rotating rod A or B, and the other elastic member is disposed between the fixing nut and the adjacent rotating rod A or B.
7. The diamond-shaped rotary friction damper according to claim 5 or 6, wherein the elastic member is a spring washer and a hard washer disposed between the spring washer and the adjacent rotating rod A or rotating rod B, and both the spring washer and the hard washer are sleeved on the rotating shaft A.
8. The diamond-shaped rotary friction damper according to claim 1, wherein the initial included angle of the rotating rod a and the rotating rod B connected to the same rotating shaft ranges from 80 ° to 100 °; the pre-tightening force of the rhombic rotary friction damper is 62 kN-125 kN.
9. The diamond-shaped rotary friction damper according to claim 1, wherein the maximum rotary arm length of the diamond-shaped rotary friction damper is 200-1200 mm; the diameter of friction disc is 150 ~ 320mm, and thickness is 3 mm.
10. The diamond-shaped rotary friction damper according to claim 1, wherein the friction plate is an aluminum magnesium alloy friction plate, and the rotating rod a and the rotating rod B are both made of steel plate structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021868171.3U CN213358998U (en) | 2020-08-31 | 2020-08-31 | Diamond rotary friction damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021868171.3U CN213358998U (en) | 2020-08-31 | 2020-08-31 | Diamond rotary friction damper |
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| CN213358998U true CN213358998U (en) | 2021-06-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114645584A (en) * | 2022-04-16 | 2022-06-21 | 北京工业大学 | Rotary friction self-resetting damper |
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2020
- 2020-08-31 CN CN202021868171.3U patent/CN213358998U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114645584A (en) * | 2022-04-16 | 2022-06-21 | 北京工业大学 | Rotary friction self-resetting damper |
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