CN212376064U

CN212376064U - Composite metal damper

Info

Publication number: CN212376064U
Application number: CN202021195308.3U
Authority: CN
Inventors: 吴洋洋; 季凤梅; 周凯; 张礼
Original assignee: Shanghai Lanke Building Damping Technology Co ltd; Nantong Lanke Shock Absorption Technology Co ltd
Current assignee: Shanghai Lanke Building Damping Technology Co ltd; Nantong Lanke Shock Absorption Technology Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-01-19
Anticipated expiration: 2030-06-24

Abstract

The utility model discloses a composite metal damper, which comprises two connecting end plates extending axially; the energy-consumption core plate, the first middle plate, the second middle plate, the friction plate and the outer side restraint plate are arranged between the two connecting end plates and extend in the radial direction; the metal damper and the friction damper are combined skillfully, the outer side restraining plates of the friction damper are used as restraining components of the energy-consuming core plate of the metal damper, and the outer side restraining plates on the two sides are pre-tightened through bolts to restrain the out-of-plane deformation of the energy-consuming core plate, so that the performance of the metal damper is enhanced, and the damage to the energy-consuming core plate caused by the traditional mode of welding stiffening ribs is avoided; by utilizing the hysteresis characteristic of the friction damper, the second rigidity of the metal damper is effectively reduced, so that the metal damper can meet the requirement of anti-seismic design.

Description

Composite metal damper

Technical Field

The utility model belongs to the technical field of the attenuator and specifically relates to a compound metal damper.

Background

The traditional engineering structure earthquake resistance is mainly characterized in that the energy generated by earthquake is stored and dissipated through the earthquake resistance (rigidity, strength and the like) of the structure, so that the earthquake fortification standard is met: the small earthquake is not damaged, the medium earthquake can be repaired, and the large earthquake is not fallen. However, the method of resisting earthquake through the structure itself is actually a concept of 'hard-to-hard', and the structure is often damaged destructively after an earthquake occurs, so that a great deal of manpower, material resources and financial resources are consumed even if the structure is repaired. The structural vibration control means substitutes the concepts of ' flexible rigidity and ' rigid-flexible coordination ', and some vibration isolation devices or energy dissipation components are arranged at specific positions of the structure, so that the dynamic characteristics of the structure are changed, the reaction and damage of the structure under the dynamic action of wind vibration, earthquake and the like are reduced, and the earthquake resistance and disaster reduction capability of the structure is effectively enhanced.

The metal damper is a commonly used energy dissipation component which dissipates energy through the elastic-plastic hysteresis deformation of metal elements with good ductility, and the purpose of vibration reduction is achieved. The friction type damper is a device which mainly combines friction materials and metal parts into an assembly capable of generating sliding friction through certain pretightening force, so that the sliding friction among the parts is utilized to do work and further dissipate energy input from the outside.

The existing metal damper is made by welding stiffening ribs on an energy-consuming core plate to restrict the out-of-plane deformation of the core plate so as to improve the energy-consuming capability of the metal damper, but a heat affected zone is generated near the welding of the energy-consuming core plate due to the welding, the material performance of the zone is greatly reduced, and the fatigue performance of the metal damper is greatly reduced. In addition, the second rigidity is an important index of the performance of the metal damper, and due to the core plate material property, design parameters and the like, the second rigidity of the metal damper is generally large and cannot meet the design requirement.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to solve the problems existing in the prior art, the utility model provides a composite metal damper,

the technical scheme is as follows: in order to achieve the above purpose, the utility model can adopt the following technical proposal: a composite metal damper comprises a first connecting end plate and a second connecting end plate which extend axially; the energy-consumption core plate, the first middle plate, the second middle plate, the friction plate and the outer side restraint plate are arranged between the first connecting end plate and the second connecting end plate and extend in the radial direction;

the energy dissipation core plate is fixedly connected between the first connecting end plate and the second connecting end plate through two end parts and is positioned in the center; the first middle plate and the second middle plate are respectively arranged at two sides of the energy consumption core plate, and a gap is arranged between the first middle plate and the energy consumption core plate; the first middle plate and the second middle plate are fixedly connected to the second connecting end plate through end parts, and a gap is formed between the other end part and the first connecting end plate;

the first middle plate, the second middle plate and the energy dissipation core plate are axially arranged on the same plane, and a friction plate and an outer side restraint plate are sequentially attached to the outer surface of the first middle plate, the second middle plate and the energy dissipation core plate;

the outer side restraint plate is fixedly connected to the first connecting end plate through an end part, and a gap is formed between the other end part and the second connecting end plate;

and at least one bolt pre-tightening assembly penetrating through the friction plate, the first middle plate or the second middle plate is arranged on the outer side restraint plate.

The energy-consuming core plate is made of steel with good ductility; the power consumption thereof can be increased.

The first middle plate and the second middle plate are subjected to shot blasting treatment, so that the friction coefficient of the first middle plate and the second middle plate is increased.

More preferably, the friction plate is made of one of polytetrafluoroethylene, brass plate and polymer composite material.

In order to enhance the out-of-plane rigidity of the outer side constraint plate, the out-of-plane constraint effect of the outer side constraint plate is enhanced; the surface of the outer side constraint plate is transversely and longitudinally provided with a plurality of stiffening ribs.

Furthermore, the bolt pre-tightening assembly comprises a bolt, a nut and a belleville spring; the bolt sequentially penetrates through the belleville spring, the outer side restraint plate, the friction plate, the first middle plate or the second middle plate, the friction plate and the outer side restraint plate and then is matched with the nut.

The outer side restraining plates on the two sides are pre-tightened through bolts to restrain the out-of-plane deformation of the energy consumption core plate, and the pre-tightening force plays a role in restraining the out-of-plane deformation of the energy consumption core plate on one hand and enables the outer side restraining plates and the friction plate to generate friction force when sliding relatively on the other hand; the performance of the metal damper is enhanced, and the damage to the energy-consuming core plate caused by the traditional mode of welding stiffening ribs is avoided.

Gaskets are arranged at the contact parts of the bolt and the nut with other parts; the functions of increasing the contact surface and dispersing the pre-tightening force are achieved, and the distribution of the pre-tightening force is more uniform.

The butterfly spring is formed by overlapping a plurality of butterfly springs; the elastic deformation of the belleville spring compensates the loss of the friction material, and the constant friction force is kept.

Furthermore, at least one long slotted hole through which the bolt pre-tightening assembly passes is formed in the outer side restraint plate; as a reserved deformation space.

Furthermore, the energy consumption core plate, the outer side restraint plate, the first connecting end plate and the second connecting end plate are fixed in a welding mode.

Has the advantages that: the utility model has the advantages of it is following:

1) the metal damper and the friction damper are combined ingeniously, the outer side restraining plates of the friction damper are used as restraining components of the energy dissipation core plate of the metal damper, the outer side restraining plates on the two sides are pre-tightened through bolts, and out-of-plane deformation of the energy dissipation core plate is restrained, so that the performance of the metal damper is enhanced, and the damage to the energy dissipation core plate caused by a traditional mode of welding stiffening ribs is avoided.

2) By utilizing the hysteresis characteristic of the friction damper, the second rigidity of the metal damper is effectively reduced, so that the metal damper can meet the requirement of anti-seismic design.

Drawings

FIG. 1 is a schematic view of the composite metal damper of the present invention;

FIG. 2 is a schematic diagram of the right-view structure of the composite metal damper of the present invention;

FIG. 3 is a schematic sectional view A-A of FIG. 1;

fig. 4 is a schematic sectional structure view of B-B of fig. 2.

Detailed Description

Referring to fig. 1 to 4, the present invention discloses a composite metal damper, which includes a first connecting end plate 1 and a second connecting end plate 2 extending axially; the energy dissipation core plate comprises an energy dissipation core plate 3, a first middle plate 4, a second middle plate 5, a friction plate 6 and an outer side restraint plate 7, wherein the energy dissipation core plate 3, the first middle plate 4, the second middle plate 5, the friction plate 6 and the outer side restraint plate 7 are arranged between the first connection end plate 1 and the second connection end plate 2 and extend in the radial direction.

Wherein the energy-consuming core plate 3 is made of steel with good ductility; the energy consumption can be increased; the first middle plate 4 and the second middle plate 5 are subjected to shot blasting treatment, so that the friction coefficient is increased; the friction plate 6 is made of polytetrafluoroethylene.

The energy dissipation core plate 3 is fixedly connected between the first connecting end plate 1 and the second connecting end plate 2 through two end parts in a welding mode and is located in the center; the first middle plate 4 and the second middle plate 5 are respectively arranged at two sides of the energy consumption core plate 3, and a gap is arranged between the first middle plate and the energy consumption core plate 3; the arrangement of the gap effectively avoids collision between the energy-consuming core plate 3 and the middle plate when the energy-consuming core plate is deformed and consumed.

The thickness of the first middle plate 4 and the second middle plate 5 is the same as that of the energy consumption core plate 3 and are arranged on the same plane, the two middle plates are fixedly connected to the second connecting end plate 2 through end portions in a welded mode, a gap is formed between the other end portion and the first connecting end plate 1, and a friction plate 6 and an outer side restraint plate 7 are sequentially attached to the outer surfaces of the two middle plates.

The outer side restraint plate 7 is fixedly connected to the first connecting end plate 1 through end welding, and a gap is formed between the other end of the outer side restraint plate and the second connecting end plate 2; in order to enhance the out-of-plane rigidity of the outer side restraining plate 7, the out-of-plane restraining effect thereof is enhanced; the surface of the outer side restraint plate 7 is provided with a plurality of stiffening ribs 71 in the transverse direction and the longitudinal direction.

Four long slotted holes 72 for the bolt pre-tightening assembly 8 to pass through are formed in the outer side restraint plate 7; as a reserved deformation space. The bolt pre-tightening assembly 8 penetrates through the outer side restraint plate 7, the friction plate 6, the first middle plate 4 or the second middle plate 5. Specifically, the bolt pre-tightening assembly 8 comprises a bolt 81, a nut 82 and a belleville spring 83; the bolt 81 sequentially penetrates through the belleville spring 83, the outer side restraint plate 7, the friction plate 6, the first middle plate 4 or the second middle plate 5, the friction plate 6 and the outer side restraint plate 7 and then is matched with the nut 82.

The contact parts of the bolt 81, the nut 82 and other parts are provided with gaskets 84; the functions of increasing the contact surface and dispersing the pre-tightening force are achieved, and the distribution of the pre-tightening force is more uniform. The belleville springs 83 are formed by overlapping a plurality of springs; the elastic deformation of the belleville spring compensates the loss of the friction material, and the constant friction force is kept.

The outer side restraining plates 7 on the two sides are pre-tightened through bolts 81 to restrain the out-of-plane deformation of the energy dissipation core plate 3, and the pre-tightening force plays a role in restraining the energy dissipation core plate 3 out-of-plane on one hand and enables the outer side restraining plates 7 and the friction plate 6 to generate friction force when sliding relatively on the other hand; the performance of the metal damper is enhanced, and the damage to the energy-consuming core plate 3 caused by the traditional mode of welding stiffening ribs is avoided.

The working principle is as follows:

the utility model relates to a when compound metal damper is used for structure antidetonation shock attenuation, two upper and lower connection end plates pass through the linkage unit and are connected from top to bottom with the structure. When earthquake occurs, the building structure moves up and down relatively to drive the damper to move up and down. Wherein the energy-consuming core plate 3 is subjected to shear deformation along the axial direction, and the out-of-plane deformation of the energy-consuming core plate is limited by the outer restraining plate 7. Meanwhile, the outer side restraint plate 7 and the friction material are relatively deformed to generate friction force, and the long slotted hole in the outer side restraint plate 7 is a reserved deformation space; the metal damper and the friction damper are combined ingeniously, the outer side restraining plates 7 of the friction damper are used as restraining components of the metal damper energy dissipation core plate 3, the outer side restraining plates 7 on the two sides are pre-tightened through bolts to restrain out-of-plane deformation of the energy dissipation core plate 3, performance of the metal damper is enhanced, and damage to the energy dissipation core plate 3 caused by a traditional mode of welding stiffening ribs is avoided. In addition, by utilizing the hysteresis characteristic of the friction damper, the second rigidity of the metal damper is effectively reduced, so that the metal damper can meet the requirement of anti-seismic design.

Claims

1. A composite metal damper is characterized by comprising a first connecting end plate (1) and a second connecting end plate (2) which extend axially; the energy-consumption core plate is characterized by further comprising an energy-consumption core plate (3), a first middle plate (4), a second middle plate (5), a friction plate (6) and an outer side restraint plate (7), wherein the energy-consumption core plate is arranged between the first connecting end plate (1) and the second connecting end plate (2) and extends in the radial direction;

the energy dissipation core plate (3) is fixedly connected between the first connecting end plate (1) and the second connecting end plate (2) through two end parts and is positioned in the center; the first middle plate (4) and the second middle plate (5) are respectively arranged at two sides of the energy consumption core plate (3) and a gap is arranged between the first middle plate and the energy consumption core plate (3); the first middle plate (4) and the second middle plate (5) are fixedly connected to the second connecting end plate (2) through end parts, and a gap is formed between the other end part and the first connecting end plate (1);

the first middle plate (4), the second middle plate (5) and the energy consumption core plate (3) are axially arranged on the same plane, and a friction plate (6) and an outer side restraint plate (7) are sequentially attached to the outer surface of the first middle plate;

the outer side restraint plate (7) is fixedly connected to the first connecting end plate (1) through an end part, and a gap is formed between the other end part and the second connecting end plate (2);

and at least one bolt pre-tightening assembly (8) penetrating through the friction plate (6) and the first middle plate (4) or the second middle plate (5) is arranged on the outer side restraint plate (7).

2. The composite metal damper according to claim 1, wherein: the energy dissipation core plate (3) is made of steel with good ductility.

3. The composite metal damper according to claim 1, wherein: the first middle plate (4) and the second middle plate (5) are subjected to shot blasting treatment.

4. The composite metal damper according to claim 1, wherein: the friction plate (6) is made of one of polytetrafluoroethylene, a brass plate and a polymer composite material.

5. The composite metal damper according to claim 1, wherein: the surface of the outer side restraint plate (7) is transversely and longitudinally provided with a plurality of stiffening ribs (71).

6. The composite metal damper according to claim 1, wherein: the bolt pre-tightening assembly (8) comprises a bolt (81), a nut (82) and a belleville spring (83); the bolt (81) penetrates through the belleville spring (83), the outer side restraint plate (7), the friction plate (6), the first middle plate (4) or the second middle plate (5), the friction plate (6) and the outer side restraint plate (7) in sequence and then is matched with the nut (82).

7. The composite metal damper according to claim 6, wherein: and gaskets (84) are arranged at the contact parts of the bolt (81), the nut (82) and other parts.

8. The composite metal damper according to claim 6, wherein: the belleville springs (83) are formed by overlapping a plurality of belleville springs.

9. The composite metal damper according to claim 1, wherein: and the outer side restraint plate (7) is provided with at least one long slotted hole (72) through which the bolt pre-tightening assembly (8) passes.

10. The composite metal damper according to claim 1, wherein: the energy dissipation core plate (3), the outer side restraint plate (7), the first connecting end plate (1) and the second connecting end plate (2) are fixed in a welding mode.