CN118531915A - High-performance composite friction damper - Google Patents

Abstract

The invention discloses a high-performance composite friction damper, which relates to the technical field of dampers, and comprises a connecting component, a friction component, a fastening component and a limiting component; the connecting component comprises an external connecting piece, an internal connecting piece and a viscoelastic damping piece; a friction part is arranged on the end surface of the internal connecting piece; the friction component comprises a friction core plate, which is in contact and connected with the friction part; the fastening component comprises a fastener and a locking piece; the limiting component comprises a first limiting part and a second limiting part; when the seismic displacement is less than the distance between the limiting block and the friction core plate, a first-order viscoelastic energy dissipation unit dissipates energy and outputs a first-order damping force; when the seismic displacement is greater than the distance between the first limiting part and the friction core plate, the external connecting piece drives the friction core plate to slide, and the viscoelastic energy dissipation unit works together with the friction energy dissipation unit to output a second-order damping force, so as to meet the energy dissipation requirements in different scenarios, and the damping force shows an increasing trend with the increase of displacement, and the energy dissipation and shock absorption effect is obvious.

Description

A high performance composite friction damper

Technical Field

The invention relates to the technical field of dampers, and in particular to a high-performance composite friction damper.

Background Art

Adding dampers to structures to control the seismic response of structures is an effective, safe, reliable and economical shock absorption method in structural shock absorption control technology. Dampers have been widely used in the reinforcement of existing buildings and new buildings, and have good social benefits and economic advantages. At present, common dampers include velocity dampers, including viscous dampers and viscoelastic dampers; displacement dampers, including buckling restrained supports, metal yield dampers and friction dampers. However, at present, dampers can only dissipate energy in a single order, which cannot meet the shock absorption requirements of structures in complex environments, and do not have the function of meeting the energy consumption requirements of different earthquake magnitudes. For this reason, various multi-order dampers and composite dampers have been proposed in the industry, but most solutions have problems such as complex structures and large installation space.

Summary of the invention

The main purpose of the present invention is to provide a high-performance composite friction damper to solve the problems that the existing dampers are difficult to meet the energy consumption requirements of different earthquake magnitudes and have complex structures and large installation space.

To achieve the above object, the present invention provides a high-performance composite friction damper, comprising:

A connecting component, comprising an outer connecting member and an inner connecting member; a viscoelastic damping member is arranged between the outer connecting member and the inner connecting member; the viscoelastic damping member is made of a viscoelastic energy-absorbing material; and a friction portion is arranged on the end surface of the inner connecting member;

The friction assembly comprises a friction core plate disposed between two sets of opposite inner connecting members; the friction core plate is in contact with the friction portion;

The fastening assembly includes a fastener inserted between two sets of inner connecting plates and a detachable locking member disposed on the fastener; the locking member provides a pre-tightening force for the two sets of inner connecting members under the action of an external force, so as to clamp the friction core plate between the two sets of inner connecting members;

The limiting component comprises a first limiting part arranged on the outer connecting member and a second limiting part arranged on the friction core plate.

As a further improvement of the present invention, the external connecting member includes an external connecting plate; the internal connecting member includes an internal connecting plate, and one end of the external connecting plate and the inner connecting plate are overlapped with each other through a viscoelastic damping member so that the other ends of the external connecting plate and the inner connecting plate are staggered with each other; a first pin shaft hole and a second pin shaft hole are respectively provided on the mutually staggered end heads of the external connecting plate and the inner connecting plate; one end of the friction core plate extends beyond the end of the inner connecting plate where the outer connecting plate is overlapped and there is a gap between the end of the outer connecting plate away from the inner connecting plate; the viscoelastic damping member includes a rubber layer; the rubber layer is integrally connected to the external connecting plate and the inner connecting plate.

As a further improvement of the present invention, the side end of the inner connecting plate extends beyond the side end of the outer connecting plate to form a connecting portion; through holes are provided at intervals on the connecting portion; the fastener includes a bolt; one end of the bolt passes through the through hole; the locking member includes a gasket, a disc spring, and a nut which are sequentially sleeved on the bolt; and the nut is threadedly connected to the bolt.

As a further improvement of the present invention, the friction portion comprises a friction layer; the friction layer is arranged on the end of the inner connecting plate away from the outer connecting plate.

As a further improvement of the present invention, the first limiting part includes two groups of limiting blocks spaced apart on the outer connecting plate, and a spacing between the two groups of limiting blocks forms a sliding space; the second limiting part includes a limiting plate spaced apart on the end of the friction core plate extending beyond the inner connecting plate; the limiting plate is vertically connected to the friction core plate, and the limiting plate is located in the sliding space.

As a further improvement of the present invention, the limit plate is located at the exact center of the sliding space.

As a further improvement of the present invention, the first limiting portion is a first pin shaft hole on the upper connecting plate; the second limiting portion is a third pin shaft hole arranged on the friction core plate; the first pin shaft hole and the third pin shaft hole are arranged coaxially.

The beneficial effects of the present invention are embodied in:

Through the cooperation between the first limit part on the external connection part and the friction core plate, when the seismic displacement is less than the distance between the limit block and the friction core plate, the first-order viscoelastic energy dissipation unit consumes energy and outputs a first-order damping force; when the seismic displacement is greater than the distance between the first limit part and the friction core plate, the external connection part drives the friction core plate to slide, and the viscoelastic energy dissipation unit works together with the friction energy dissipation unit to output a second-order damping force to meet the energy dissipation requirements in different scenarios, and the damping force shows an increasing trend with the increase of displacement, and the energy dissipation and shock absorption effect is obvious; the two energy dissipation units of the damper will not affect each other when working, and the performance is stable.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of a high-performance composite friction damper of the present invention;

FIG2 is a schematic diagram of the connection structure of an outer connecting plate, a rubber layer, and an inner connecting plate of a high-performance composite friction damper of the present invention;

FIG3 is a front view of an inner connecting plate of a high performance composite friction damper of the present invention;

FIG4 is a schematic diagram of the sliding space structure of a high-performance composite friction damper of the present invention;

FIG5 is a schematic diagram of the connection between a high-performance composite friction damper and an external building according to the present invention;

FIG6 is a set of mechanical performance curves of a high-performance composite friction damper of the present invention;

FIG7 is a schematic diagram of the structure of a friction core plate of a high-performance composite friction damper according to the present invention;

FIG8 is a schematic diagram of another connection structure of a friction core plate of a high-performance composite friction damper of the present invention;

FIG9 is another set of mechanical performance curves of a high performance composite friction damper of the present invention;

Description of reference numerals:

1. External connecting part; 101. External connecting plate; 2. Viscoelastic damping part; 201. Rubber layer; 3. Internal connecting part; 301. Internal connecting plate; 4. Fastener; 5. Friction core plate; 6. First limiting part; 7. Locking part; 8. Friction part; 9. Second limiting part; 10. First pin shaft hole; 11. Second pin shaft hole; 12. Connecting part; 13. Through hole; 14. Sliding space; 15. Third pin shaft hole; 16. External building; 17. Embedded part; 18. Connecting ear plate; 19. Connecting pin shaft.

DETAILED DESCRIPTION

In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

Embodiment 1, referring to FIG. 1 , a high-performance composite friction damper of the present invention comprises a connecting component, a friction component, a fastening component, and a limiting component.

Among them, the connecting component includes an external connecting part 1 and an internal connecting part 3, and a viscoelastic damping part 2 is arranged between the external connecting part 1 and the internal connecting part 3, and the viscoelastic damping part 2 is made of viscoelastic energy-absorbing material; a friction part 8 is arranged on the end face of the internal connecting part 3; the friction component includes a friction core plate 5 arranged between two groups of opposite internal connecting parts 3, and the friction core plate 5 is in contact with the friction part 8; the fastening component includes a fastener 4 passed through the two groups of internal connecting plates 301, and a detachable locking part 7 arranged on the fastener 4, and the locking part 7 provides a pre-tightening force for the two groups of internal connecting parts 3 under the action of external force, so as to clamp the friction core plate 5 between the two groups of internal connecting parts 3; the limiting component includes a first limiting part 6 arranged on the external connecting part 1, and a second limiting part 9 arranged on the friction core plate 5.

Further, referring to Figures 1 and 2, the external connecting member 1 includes an external connecting plate 101, and the internal connecting member 3 includes an internal connecting plate 301. One end of the external connecting plate 101 and the inner connecting plate 301 are overlapped with each other through the viscoelastic damping member 2, so that the other ends of the external connecting plate 101 and the inner connecting plate 301 are offset from each other; a first pin shaft hole 10 and a second pin shaft hole 11 are respectively provided on the mutually offset ends of the external connecting plate 101 and the inner connecting plate 301; one end of the friction core plate 5 extends beyond the end of the inner connecting plate 301 overlapping the external connecting plate 101 and there is a gap between the end of the external connecting plate 101 away from the inner connecting plate 301; the viscoelastic damping member 2 includes a rubber layer 201, and the rubber layer 201 is integrally connected with the external connecting plate 101 and the inner connecting plate 301.

Preferably, the viscoelastic damping element is made of rubber.

Preferably, the outer connecting plate 101 and the inner connecting plate 301 are both rectangular plates.

Preferably, the rubber layer 201, the outer connecting plate 101 and the inner connecting plate 301 are integrally connected by vulcanization.

Preferably, the rubber layer 201, the outer connecting plate 101, and the inner connecting plate 301 are each provided in two groups.

In the above arrangement, two groups are provided for the combination of the outer connecting plate 101, the inner connecting plate 301 and the rubber layer 201, and the ends of the outer connecting plate 101 and the inner connecting plate 301 which are far away from each other are provided with a first pin hole 10 and a second pin hole 11, respectively, so as to facilitate the connection of the entire damper with the external building 16.

Further, referring to Figures 1 and 2, the side end of the inner connecting plate 301 extends beyond the side end of the outer connecting plate 101 to form a connecting portion 12, and through holes 13 are provided at intervals on the connecting portion 12; the fastener 4 includes a bolt, one end of which passes through the through hole 13; the locking member 7 includes a gasket, a disc spring, and a nut which are sequentially mounted on the bolt, and the nut is threadedly connected to the bolt.

Preferably, the width of the outer connecting plate 101 is consistent with that of the inner connecting plate 301 , and the inner connecting plate 301 extends along the width direction to form a connecting portion 12 .

Further, referring to FIG. 3 , the friction portion 8 includes a friction layer, and the friction layer is disposed on the end of the inner connecting plate 301 away from the outer connecting plate 101 .

Preferably, the friction layer is made of polymer friction material.

In the above arrangement, the friction core plate 5 is located between the two groups of inner connecting plates 301 and contacts the friction layer. When the bolts and nuts are tightened, the two groups of inner connecting plates 301 move toward each other to clamp the friction core plate 5 .

Further, referring to Figure 4, the first limiting portion 6 includes two groups of limiting blocks spaced apart on the outer connecting plate 101, and there is a spacing between the two groups of limiting blocks to form a sliding space 14; the second limiting portion 9 includes a limiting plate disposed on the end of the friction core plate 5 extending beyond the inner connecting plate 301, the limiting plate is vertically connected to the friction core plate 5, and the limiting plate is located in the sliding space 14.

Preferably, the limit blocks are located on the side walls of the outer connecting plates 101 away from the inner connecting plates 301 and overlapped with the inner connecting plates 301 , and after the two groups of inner connecting plates 301 are connected by bolts, the limit blocks are arranged to face each other.

Furthermore, the limiting plate is located at the exact center of the sliding space 14 .

Preferably, a “T”-shaped structure is formed between the limit plate and the friction core plate 5 .

In the above arrangement, referring to FIG1 , an embedded part 17 is provided in the external building 16, and a connecting ear plate 18 is provided on the embedded part 17, and a connecting hole is provided on the connecting ear plate 18; the entire damper is connected to the connecting ear plate 18 through the first pin hole 10 and the second pin hole 11 on the upper connecting plate and the lower connecting plate respectively through the connecting pin 19; the outer connecting plate 101 and the inner connecting plate 301 are vulcanized into one with the rubber layer 201 to form a viscoelastic energy dissipation unit, which can also dissipate energy under relatively small vibration conditions and can meet the energy dissipation requirements of small and medium earthquakes and wind earthquakes; the friction layer is installed on the inner side of the inner connecting plate 301; the friction core plate 5 is located at the center of the damper, between the two viscoelastic energy dissipation units; the limit block is installed On the inner side of the outer connecting plate 101; the viscoelastic energy dissipation unit, the friction core plate 5, etc. are installed as a whole through fastening components to form a friction energy dissipation unit; thus, an adjustable high-performance composite friction damper is formed; the damper has a simple structure and is easy to process and manufacture. The damper is similar in size to an ordinary damper and requires a small installation space; the damper adopts a viscoelastic plus friction energy dissipation unit mechanism. The viscoelastic energy dissipation unit has a restoring force, which can make up for the defect that the friction damper cannot be reset, and can solve the energy dissipation needs of small and medium earthquakes; the output of the friction energy dissipation unit is stable, and the superimposed energy dissipation of the two can improve the shear resistance of the viscoelastic energy dissipation unit. At the second order, the output damping force meets the needs of large earthquakes; the two energy dissipation units of the damper will not affect each other when working, and the performance is stable.

Under the action of small and medium earthquakes, the displacement caused by the earthquake is less than the distance between the limit plate and the limit blocks on both sides. The outer connecting plate 101 starts to move due to the earthquake. The outer connecting plate 101 moves relative to the inner connecting plate 301, and the rubber layer 201 between the two is sheared, outputting a first-order viscoelastic damping force (VED); when the earthquake action increases, the displacement generated is greater than the distance between the limit plate and the limit blocks on both sides. At this time, the upper limit block of the outer connecting plate 101 drives the friction core plate 5 to move, and the friction energy dissipation unit (FD) adds energy dissipation. At this time, the energy dissipation unit changes from a single viscoelastic energy dissipation unit (VED) to a superposition of viscoelastic friction energy dissipation units (VED+FD), that is, a second-order damping force. The output damping force increases, and the shock absorption and energy dissipation effect is enhanced. Its mechanical performance curve is shown in Figure 6. In this embodiment, the variable-order displacement can be adjusted by adjusting the distance between the limit plate and the limit blocks on both sides to meet different design requirements.

In Figure 6, the X-axis represents displacement and the Y-axis represents damping force; line segments A and B represent that only the output first-order viscoelastic damping force (VED) remains; line segments C and D represent that a single viscoelastic energy dissipation unit (VED) is changed to a superposition of viscoelastic friction energy dissipation units (VED+FD); line segment E represents variable-order displacement, with the first-order viscoelastic damping force (VED) being the largest; line segment F represents variable design displacement, with the second-order damping force being the largest.

Through the cooperation between the upper limit block of the external connecting plate 101 and the friction core plate 5, when the seismic displacement is less than the distance between the limit block and the friction core plate 5, the first-order viscoelastic energy dissipation unit consumes energy and outputs a first-order damping force; when the seismic displacement is greater than the distance between the limit block and the friction core plate 5, the external connecting plate 101 drives the friction core plate 5 to slide, and the viscoelastic energy dissipation unit works together with the friction energy dissipation unit to output a second-order damping force to meet the energy consumption requirements in different scenarios, and the damping force shows an increasing trend with the increase of displacement, and the energy consumption and shock absorption effect is obvious.

Embodiment 2, based on the above embodiment, see Figures 7 and 8, the first limiting portion 6 is the first pin shaft hole 10 on the upper connecting plate, the second limiting portion 9 is the third pin shaft hole 15 arranged on the friction core plate 5, and the first pin shaft hole 10 and the third pin shaft hole 15 are arranged coaxially.

Preferably, one end of the friction core plate 5 extending beyond the inner connecting plate 301 is flush with one end of the outer connecting plate 101 away from the inner connecting plate 301 .

In the above setting, the pin passes through the first pin hole 10 and the third spool hole on the connecting ear plate 18 in sequence, thereby connecting the outer connecting plate 101, the friction core plate 5 and the external building 16, so that the viscoelastic energy dissipation unit and the friction energy dissipation unit can work simultaneously. The viscoelastic energy dissipation unit can provide restoring force for the damping force, and its mechanical performance curve is shown in Figure 9.

In FIG9 , the X-axis represents displacement, the Y-axis represents damping force; line segment G represents the start-slip displacement and the start-slip damping force; line segment H represents the design displacement and the maximum damping force.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A high performance composite friction damper, comprising: A connection assembly, comprising an external connection member (1) and an internal connection member (3); a viscoelastic damping member (2) is provided between the external connection member (1) and the internal connection member (3); the viscoelastic damping member (2) is made of a viscoelastic energy dissipation material; and a friction portion (8) is provided on the end surface of the internal connection member (3); The friction assembly comprises a friction core plate (5) arranged between two sets of opposite inner connecting members (3); the friction core plate (5) is in contact with a friction portion (8); A fastening assembly, comprising a fastener (4) inserted between two groups of inner connecting plates (301), and a detachable locking member (7) arranged on the fastener (4); the locking member (7) provides a pre-tightening force for the two groups of inner connecting members (3) under the action of an external force, so as to clamp the friction core plate (5) between the two groups of inner connecting members (3); The limiting assembly comprises a first limiting portion (6) arranged on the external connecting member (1) and a second limiting portion (9) arranged on the friction core plate (5). 2. A high-performance composite friction damper according to claim 1, characterized in that: the outer connecting member (1) comprises an outer connecting plate (101); the inner connecting member (3) comprises an inner connecting plate (301); one end of the outer connecting plate (101) and the inner connecting plate (301) are overlapped with each other through the viscoelastic damping member (2), so that the other ends of the outer connecting plate (101) and the inner connecting plate (301) are mutually displaced; the outer connecting plate (101) and the inner connecting plate (301) are overlapped with each other through the viscoelastic damping member (2), so that the other ends of the outer connecting plate (101) and the inner connecting plate (301) are mutually displaced; The mutually offset ends of the plates (301) are respectively provided with a first pin shaft hole (10) and a second pin shaft hole (11); one end of the friction core plate (5) extends beyond the end where the inner connecting plate (301) and the outer connecting plate (101) overlap, and there is a gap between the end of the outer connecting plate (101) and the inner connecting plate (301) away from the end; the viscoelastic damping component (2) comprises a rubber layer (201); the rubber layer (201) is integrally connected to the outer connecting plate (101) and the inner connecting plate (301). 3. A high-performance composite friction damper according to claim 2, characterized in that: the side end of the inner connecting plate (301) extends beyond the side end of the outer connecting plate (101) to form a connecting portion (12); through holes (13) are provided at intervals on the connecting portion (12); the fastener (4) includes a bolt; one end of the bolt passes through the through hole (13); the locking member (7) includes a gasket, a disc spring, and a nut which are sequentially mounted on the bolt; and the nut is threadedly connected to the bolt. 4. A high-performance composite friction damper according to claim 3, characterized in that: the friction portion (8) comprises a friction layer; the friction layer is arranged on the end of the inner connecting plate (301) away from the outer connecting plate (101). 5. A high-performance composite friction damper according to claim 4, characterized in that: the first limiting portion (6) includes two groups of limiting blocks spaced apart on the outer connecting plate (101), and there is a spacing between the two groups of limiting blocks to form a sliding space (14); the second limiting portion (9) includes a limiting plate arranged on the end of the friction core plate (5) extending beyond the inner connecting plate (301); the limiting plate is vertically connected to the friction core plate (5), and the limiting plate is located in the sliding space (14). 6. A high-performance composite friction damper according to claim 5, characterized in that the limit plate is located at the exact center of the sliding space (14). 7. A high-performance composite friction damper according to claim 4, characterized in that: the first limiting portion (6) is a first pin shaft hole (10) on the upper connecting plate; the second limiting portion (9) is a third pin shaft hole (15) arranged on the friction core plate (5); the first pin shaft hole (10) and the third pin shaft hole (15) are arranged coaxially.