Self-resetting friction damper

Abstract

The utility model discloses a self-resetting friction damper, and belongs to the technical field of building earthquake resistance. Comprising an upper pressing plate and a lower pressing plate which are distributed up and down and symmetrically arranged, a friction block is arranged between the upper pressing plate and the lower pressing plate, connecting lugs are arranged at the two ends of the friction block, at least one friction part is arranged on the friction block, and each friction part comprises two friction protrusions which are symmetrically arranged up and down. Friction grooves matched with the outer surfaces of the friction protrusions in shape are formed in the contact faces of the upper pressing plate and the friction protrusions and the contact faces of the lower pressing plate and the friction protrusions, the friction protrusions are arranged in the friction grooves in a sliding mode, and a plurality of installation through holes distributed in a rectangular mode are formed in the upper pressing plate and the lower pressing plate. The multiple installation through holes are symmetrically formed along the center line of the upper pressing plate in the width direction, and the friction block is provided with a plurality of strip-shaped holes corresponding to the installation through holes. According to the technical scheme, the anti-seismic capacity of a building is improved in a friction energy dissipation mode among the upper pressing plate, the lower pressing plate and the friction block.

Description

Technical Field

[0001] The utility model belongs to the technical field of building earthquake resistance, and particularly relates to a self - resetting friction damper. Background Art

[0002] The damper for building earthquake resistance is an important structural device, which is used to reduce the vibration of a building under the action of earthquake or wind. It reduces the vibration amplitude by increasing the damping of the structure, thereby protecting the building from damage. The working principle of the damper is mainly based on the principles of vibration transmission and energy consumption. Its core is energy consumption. By absorbing the vibration energy and converting it into other forms of energy, such as heat energy, the structure vibration is reduced.

[0003] In the prior art, the method of arranging viscous dampers and metal dampers is usually adopted to improve the earthquake resistance ability of buildings. However, the price of using viscous dampers is relatively high, and the durability is not good. Oil leakage is likely to occur in the later stage; when using metal dampers, large deformations are likely to occur after an earthquake, resulting in the damage of the damper, and even if it is not damaged after energy consumption, it cannot be automatically reset. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a self - resetting friction damper to solve the problems that when the damper in the prior art is used for building earthquake resistance, the cost of the damper is high and it cannot be automatically reset after energy consumption.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A self - resetting friction damper of the utility model includes an upper pressure plate and a lower pressure plate which are distributed up and down and symmetrically arranged. A friction block is arranged between the upper pressure plate and the lower pressure plate. Connecting ears are arranged at both ends of the friction block. At least one friction part is arranged on the friction block. One friction part includes two friction protrusions which are symmetrically arranged up and down. Friction grooves which match the outer surface shape of the friction protrusions are arranged on the contact surfaces of the upper pressure plate and the lower pressure plate with the friction protrusions. The friction protrusions are slidably arranged in the friction grooves. A number of installation through - holes which are rectangularly distributed are arranged on the upper pressure plate and the lower pressure plate. The number of installation through - holes is symmetrically arranged along the center line of the width direction of the upper pressure plate. A number of strip - shaped holes corresponding to the installation through - holes are arranged on the friction block. Tensile screws are arranged in the strip - shaped holes. The tensile screws pass through the strip - shaped holes and the installation through - holes, and locking nuts are arranged at both ends of the tensile screws. A number of disc springs are arranged between the locking nut and the upper pressure plate and between the locking nut and the lower pressure plate. The locking nuts squeeze the disc springs against the surfaces of the upper pressure plate and the lower pressure plate.

[0007] Further, the width of the strip - shaped hole is at least 0.1 mm larger than the diameter of the tensile screw.

[0008] Furthermore, the length of the strip-shaped hole is at least greater than twice the diameter of the tension bolt.

[0009] Furthermore, the middle part of the friction block is disconnected, and there is an installation distance between the two disconnected parts.

[0010] Furthermore, the friction protrusion is a wedge-shaped protrusion or an arc-shaped protrusion.

[0011] Furthermore, a transition area is provided between two adjacent friction parts.

[0012] Furthermore, when the upper pressing plate and the lower pressing plate are in close contact with the friction block, the tension bolt is located in the middle of the strip-shaped hole.

[0013] The beneficial effects of the present utility model are as follows:

[0014] (1) The damper in this technical solution can stably provide friction energy dissipation and can automatically reset after energy dissipation;

[0015] (2) In this technical solution, the structure of providing the clamping force through the disc spring is easy to adjust and maintain. At the same time, the pre-tightening force can be adjusted by adjusting the relative position of the locking nut relative to the tension bolt, thereby changing the friction damping force range of this damper, and thus it can be applicable to more shock-absorbing and energy-dissipating scenarios with different requirements;

[0016] (3) The damper in this technical solution can achieve two-way energy dissipation in tension and compression, and the structures of the various components in this damper are simple, and the overall cost is low.

[0017] Other advantages, objectives and features of the present utility model will be described in the subsequent description, and to some extent, they are obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the objectives, technical solutions and beneficial effects of the present utility model clearer, the present utility model provides the following drawings for illustration:

[0019] Figure 1 It is a three-dimensional schematic diagram of the wedge-shaped self-resetting friction damper of the present utility model;

[0020] Figure 2 It is a front view schematic diagram of the wedge-shaped self-resetting friction damper of the present utility model;

[0021] Figure 3 It is a three-dimensional schematic diagram of the friction block in the wedge-shaped self-resetting friction damper of the present utility model;

[0022] Figure 4 This is a three-dimensional schematic diagram of the upper pressure plate and the lower pressure plate in the wedge-shaped self-resetting friction damper of the present utility model.

[0023] The markings in the attached drawings are as follows:

[0024] 1. Upper pressure plate; 2. Lower pressure plate; 3. Installation through hole; 4. Connecting ear; 5. Friction block; 6. Friction groove; 7. Strip-shaped hole; 8. Tensile screw; 9. Locking nut; 10. Disc spring. Specific implementation manner

[0025] As Figures 1 to 4 shown, a self-resetting friction damper of the present utility model includes an upper pressure plate 1 and a lower pressure plate 2 which are vertically distributed and symmetrically arranged. A friction block 5 is provided between the upper pressure plate 1 and the lower pressure plate 2. Connecting ears 4 are provided at both ends of the friction block 5. At least one friction part is provided on the friction block 5. One friction part includes two friction protrusions which are symmetrically arranged up and down. Friction grooves 6 which match the outer surface shape of the friction protrusions are provided on the contact surfaces of the upper pressure plate 1 and the lower pressure plate 2 with the friction protrusions. The friction protrusions are slidably arranged in the friction grooves 6. A number of installation through holes 3 which are rectangularly distributed are provided on the upper pressure plate 1 and the lower pressure plate 2. The number of installation through holes 3 is symmetrically arranged along the center line of the width direction of the upper pressure plate 1. A number of strip-shaped holes 7 corresponding to the installation through holes 3 are provided on the friction block 5. A tensile screw 8 is provided in the strip-shaped holes 7. The tensile screw 8 passes through the strip-shaped holes 7 and the installation through holes 3. Locking nuts 9 are provided at both ends of the tensile screw 8. A number of disc springs 10 are provided between the locking nut 9 and the upper pressure plate 1 and between the locking nut 9 and the lower pressure plate 2. The locking nut 9 squeezes and presses the disc springs 10 against the surfaces of the upper pressure plate 1 and the lower pressure plate 2.

[0026] In this technical solution, a pre-tightening force is applied to the disc spring 10 by the tensile screw 8. The disc spring 10 transmits the pre-pressure force to make the upper pressure plate 1, the lower pressure plate 2 and the friction block 5 fit tightly. When the damper generates displacement deformation, a restoring force and a frictional force that resist the deformation will be generated on the contact surfaces of the three. The magnitude of this restoring force is related to the pre-pressure force provided by the disc spring 10 and the profile angle. The greater the slope of the friction protrusion, the greater the restoring force provided. The magnitude of the frictional force is also related to the pre-pressure force and the profile angle. As the displacement deformation of the damper expands, the pre-pressure force of the disc spring 10 becomes larger, and both the restoring force and the frictional force become larger, and they are in a linear proportional relationship. When the damper is not stressed, due to the existence of the spring pre-tightening force, a restoring force will be generated, causing components such as the friction block 5 to generate displacement recovery. At this time, a reverse frictional force is generated. The restoring force minus the reverse frictional force is the deformation restoring force that the damper can finally provide, realizing the function of self-resetting. In the reciprocating deformation of the damper, frictional energy dissipation occurs, consuming seismic energy. Moreover, the friction block 5, the upper pressure plate 1 and the lower pressure plate 2 are relatively wear-resistant, so the durability of the damper is better. At the same time, this damper has a large displacement deformation ability. When the displacement deformation reaches the maximum, the ultimate damping force of the damper is reached.

[0027] In an implementable manner, the width of the strip-shaped hole 7 is greater than the diameter of the tension bolt 8 by at least 0.1 mm, preferably 0.5 mm. While achieving lateral limitation, it can also ensure the sliding effect of the friction block 5. At the same time, the length of the strip-shaped hole 7 is at least greater than twice the diameter of the tension bolt 8. It is not difficult to understand that the length of the strip-shaped hole 7 is equivalent to controlling the stroke range of the damper, and it can be designed and manufactured according to the actual situation.

[0028] In an implementable manner, the middle part of the friction block is disconnected, and there is an installation spacing between the two disconnected parts. The disconnection setting enables the friction blocks 5 on both sides to move towards each other when compressed and move away from each other when in tension, thereby realizing two-way energy dissipation. At the same time, the installation spacing also controls the stroke range of the damper, and it can be designed and manufactured according to the actual situation.

[0029] In an implementable manner, the friction protrusion is a wedge-shaped protrusion or an arc-shaped protrusion. Of course, other protrusion shapes that can achieve friction energy dissipation are also within the protection scope of this solution. Specifically, as Figure 3 shown, no further elaboration will be made here.

[0030] In an implementable manner, a transition region is provided between adjacent two friction parts, which can enhance the strength of the friction block 5 and avoid the sliding interference between adjacent friction protrusions in the friction grooves 6.

[0031] In an implementable manner, when the upper pressure plate 1 and the lower pressure plate 2 are in close contact with the friction block 5, the tension bolt 8 is located in the middle of the strip-shaped hole 7 to ensure the initial position and avoid the problem that the sliding of the friction block 5 is blocked due to improper installation position.

[0032] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the present invention and are not restrictive. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A self-resetting friction damper, characterized in that: The invention comprises an upper pressing plate (1) and a lower pressing plate (2) which are distributed and symmetrically arranged up and down, a friction block (5) is arranged between the upper pressing plate (1) and the lower pressing plate (2), connecting ears (4) are arranged at both ends of the friction block (5), at least one friction part is arranged on the friction block (5), and one of the friction parts comprises two friction protrusions which are symmetrically arranged up and down, and the contact surfaces of the upper pressing plate (1) and the lower pressing plate (2) with the friction protrusions are provided with friction grooves (6) which match the shape of the outer surface of the friction protrusions, and the friction protrusions are slidably arranged in the friction grooves (6), and the upper pressing plate (1) and the lower pressing plate (2) are provided with a plurality of rectangularly distributed mounting through holes (3), and the plurality of the The mounting through holes (3) are symmetrically arranged along the center line of the width direction of the upper pressure plate (1); the friction block (5) is provided with a plurality of strip holes (7) corresponding to the mounting through holes (3); a tension screw (8) is arranged in the strip hole (7); the tension screw (8) passes through the strip hole (7) and the mounting through hole (3); and locking nuts (9) are arranged on both ends of the tension screw (8); a plurality of disc springs (10) are arranged between the locking nut (9) and the upper pressure plate (1) and between the locking nut (9) and the lower pressure plate (2); the locking nut (9) presses the disc springs (10) against the surfaces of the upper pressure plate (1) and the lower pressure plate (2).

2. A self-resetting friction damper according to claim 1, characterized in that: The width of the strip-shaped hole (7) is at least 0.1 mm greater than the diameter of the tension screw rod (8).

3. A self-resetting friction damper according to claim 1, characterized in that: The length of the strip-shaped hole (7) is at least twice the diameter of the tension screw rod (8).

4. A self-resetting friction damper according to claim 1, characterized in that: The middle part of the friction block (5) is broken, and an installation distance is provided between the two broken parts.

5. A self-resetting friction damper according to claim 1, characterized in that: The friction protrusion is a wedge-shaped protrusion or an arc-shaped protrusion.

6. A self-resetting friction damper according to claim 1, characterized in that: A transition area is provided between two adjacent friction parts.

7. A self-resetting friction damper according to claim 1, characterized in that: When the upper pressing plate (1) and the lower pressing plate (2) are tightly fitted with the friction block (5), the tension screw rod (8) is located in the middle of the strip hole (7).

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