A composite damper

Abstract

The present invention relates to the technical field of earthquake resistance of bridge construction, and aims to solve the problem that the intensity of earthquake action faced by building structures cannot be accurately predicted, and traditional friction dampers cannot take into account both strong earthquakes and weak earthquakes. A composite damper is provided, including a left ear plate and a right ear plate, the left ear plate is connected to a secondary cylinder, the right ear plate is connected to a main cylinder, the secondary cylinder and the main cylinder are outer-circuited with an outer cylinder, a shear energy dissipation component is provided between the main cylinder and the outer cylinder, and a friction energy dissipation component is provided inside the main cylinder. The beneficial effects of the present invention are: combining shear energy dissipation with friction energy dissipation, so that a large amount of mechanical energy can be converted into heat energy and dissipated, so that the structure has good energy dissipation and shock absorption capacity, and meets the shock absorption requirements during strong earthquakes and weak earthquakes, and has a simple structure, is easy to manufacture, has flexible layout, is easy to install, has high operating efficiency and low maintenance costs.

Description

Technical Field

[0001] The invention relates to the technical field of bridge building earthquake resistance, and in particular to a composite damper. Background Art

[0002] With the acceleration of my country's urbanization process, the expansion of urban scale and the more complex urban building structures, in earthquake-resistant design, we must not only consider ensuring the safety of people's lives, but also control the economic losses caused by damage to building structures and equipment. The earthquake-resistant method of traditional structures is to passively resist earthquakes by enhancing the earthquake resistance of the structure itself. Due to the randomness of earthquakes, people cannot accurately estimate the intensity and characteristics of future earthquakes.

[0003] In the earthquake and wind resistance design of building structures, if the friction damper is designed according to the situation under strong earthquake, the damper will not slide at all under weak earthquake, and the friction damper cannot eliminate energy. If the sliding friction force is determined according to the weak earthquake, the damper will not achieve the ideal shock absorption effect under strong earthquake because the output tonnage is too small. Since the intensity of the earthquake faced by the building structure cannot be accurately predicted, the use of such friction dampers as shock absorption components in the building structure has the problem of not being able to take into account both strong and weak earthquakes. Summary of the invention

[0004] The present invention aims to provide a composite damper to solve the problem that the intensity of earthquake action faced by building structures cannot be accurately predicted, so using traditional friction dampers as shock-absorbing components in building structures cannot take into account both strong earthquakes and weak earthquakes.

[0005] The embodiment of the present invention is achieved as follows:

[0006] A composite damper comprises a left ear plate and a right ear plate, wherein the left ear plate is connected to a secondary cylinder, and the right ear plate is connected to a main cylinder, an outer tube is provided outside the secondary cylinder and the main cylinder, a shear energy dissipation component is provided between the main cylinder and the outer tube, and a friction energy dissipation component is provided inside the main cylinder.

[0007] From the perspective of facilitating the structure to achieve adjustable damping force, the present invention proposes a composite damper, which combines shear energy dissipation with friction energy dissipation, so that a large amount of mechanical energy can be converted into heat energy and dissipated, thereby making the structure have good energy dissipation and shock absorption capabilities and meet the shock absorption requirements during strong and weak earthquakes.

[0008] Specifically, under the action of an earthquake, when the horizontal tensile force of the transverse bridge is transmitted to the right ear plate through the structure, the main cylinder moves to the left or right relative to the auxiliary cylinder under the action of external force, which will cause the friction energy dissipation component inside the main cylinder to play a role. By changing the sliding friction between the friction energy dissipation component and the main cylinder, the seismic energy is converted into heat energy generated by friction and dissipated, thereby achieving shock-absorbing energy dissipation. At the same time, it will also cause shear deformation of the shear energy dissipation component, thereby converting the seismic energy into heat energy of the shear energy dissipation component, thereby achieving shock-absorbing energy dissipation.

[0009] It can be seen that the method of combining shear energy dissipation with friction energy dissipation as described in the present invention can effectively consume earthquake energy. Since the pressure between the friction energy dissipation component and the main cylinder can be easily changed, the sliding friction between the two can be changed, and the mechanical energy is converted into heat energy. At the same time, the shear energy dissipation component is used to dissipate shear deformation. Therefore, the structure has a good shock-absorbing effect under the action of earthquakes of different intensities, and has a simple structure, easy manufacturing, flexible layout, easy installation, high operating efficiency and low maintenance cost.

[0010] As an option:

[0011] The left ear plate is connected to the auxiliary cylinder as a whole through a threaded pair, the right ear plate is connected to the main cylinder as a whole through a threaded pair, and the outer tube is connected to the auxiliary cylinder as a whole through a threaded pair.

[0012] As an option:

[0013] The friction energy dissipation component includes a friction rod, an inner wedge block and an outer wedge block. The friction rod is connected to the left ear plate, the inner wedge block is sleeved on the friction rod, the outer wedge block is sleeved on the inner wedge block, and the outer wedge block abuts against the inner wall of the master cylinder.

[0014] As an option:

[0015] The inner wedge block comprises two inner wedge block units arranged opposite to each other, with a gap between them.

[0016] The inner wedge block can squeeze the outer wedge block, changing the positive pressure between the outer wedge block and the inner wall of the main cylinder to automatically adjust the sliding friction force, thereby obtaining different damping forces, which can simultaneously meet the shock absorption requirements of the structure during strong and weak earthquakes.

[0017] As an option:

[0018] The outer wedge block includes a plurality of outer wedge block units arranged in an enclosed manner, a gap exists between two adjacent outer wedge block units, and the gap can be changed by the inner wedge block.

[0019] Specifically, when the gap between two relatively arranged inner wedge block units decreases, the outer wedge block will be stretched open, the gap between two adjacent outer wedge block units will increase, and the positive pressure between the outer wedge block and the main cylinder will increase. When subjected to a transverse earthquake, the outer wedge block and the main cylinder will move relative to each other, and sliding friction will be generated between the two, and the seismic energy will be converted into frictional heat energy.

[0020] As an option:

[0021] The friction pull rod is threadedly connected to the left ear plate.

[0022] As an option:

[0023] A stopper is provided at the end of the friction pull rod for limiting the inner wedge block.

[0024] Prevent the inner wedge block from sliding off the friction pull rod.

[0025] As an option:

[0026] An elastic component is provided between the stopper and the inner wedge block.

[0027] Used to ensure that the attenuation of the preload force is reduced as much as possible.

[0028] As an option:

[0029] The elastic component is a spring.

[0030] As an option:

[0031] The friction rod is a bolt rod, including a rod portion and a head portion, the rod portion is threaded, the stopper is the head portion of the friction rod, and the inner wedge block is located between the second adjusting nut and the head portion of the friction rod.

[0032] As an option:

[0033] The left ear plate is provided with an adjusting nut 1, and the friction pull rod is provided with an adjusting nut 2. The adjusting nut 1 and the adjusting nut 2 form a gear transmission pair, and the inner wedge block and the outer wedge block are squeezed by adjusting the gear transmission pair.

[0034] The friction unit (inner wedge block and outer wedge block) is squeezed by adjusting the gear transmission pair, and the positive pressure between the friction unit and the inner wall of the master cylinder is changed to automatically adjust the sliding friction force, thereby obtaining different damping forces, which can simultaneously meet the shock absorption requirements of the structure during strong and weak earthquakes.

[0035] As an option:

[0036] The gear transmission pair can be replaced by a worm gear or the like.

[0037] As an option:

[0038] The shear energy dissipation component comprises a lead core, and the lead core is embedded in the gap ring groove between the main cylinder and the outer cylinder.

[0039] When subjected to a transverse earthquake, the right ear plate drives the main cylinder to slide, the main cylinder and the outer cylinder move relative to each other, the lead core undergoes shear deformation, and the energy generated by the external force is converted into heat energy of the lead core, thereby achieving shock absorption and energy consumption.

[0040] As an option:

[0041] An end cap is provided at the end of the lead core, and the outer cylinder is threadedly connected to the end cap.

[0042] Prevent lead spills from polluting the environment.

[0043] As an option:

[0044] The auxiliary cylinder and the end cover are both provided with lead core collecting grooves.

[0045] Collect worn lead cores to prevent lead spillage and contamination of the environment.

[0046] As an option:

[0047] The auxiliary cylinder and the end cover are both provided with sealing grooves, and sealing rings are installed in the sealing grooves.

[0048] Used for sealing to prevent lead from spilling and polluting the environment.

[0049] As an option:

[0050] The sealing ring is a metal sealing ring.

[0051] The metal sealing ring has good sealing performance.

[0052] As an option:

[0053] The sealing ring is a rubber sealing ring.

[0054] The rubber sealing ring has good sealing and waterproof performance.

[0055] As an option:

[0056] The master cylinder and the auxiliary cylinder are provided with limiting grooves to play a limiting role.

[0057] As an option:

[0058] The left ear plate is fixedly connected to the pier, and the right ear plate is fixedly connected to the bridge beam.

[0059] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0060] From the perspective of facilitating the structure to achieve adjustable damping force, the present invention proposes a composite damper, which combines shear energy dissipation with friction energy dissipation, so that a large amount of mechanical energy can be converted into heat energy and dissipated, thereby making the structure have good energy dissipation and shock absorption capabilities and meet the shock absorption requirements during strong and weak earthquakes.

[0061] Specifically, under the action of an earthquake, when the horizontal tensile force of the transverse bridge is transmitted to the right ear plate through the structure, the main cylinder moves to the left or right relative to the auxiliary cylinder under the action of external force, which will cause the friction energy dissipation component inside the main cylinder to play a role. By changing the sliding friction between the friction energy dissipation component and the main cylinder, the seismic energy is converted into heat energy generated by friction and dissipated, thereby achieving shock-absorbing energy dissipation. At the same time, it will also cause shear deformation of the shear energy dissipation component, thereby converting the seismic energy into heat energy of the shear energy dissipation component, thereby achieving shock-absorbing energy dissipation.

[0062] It can be seen that the method of combining shear energy dissipation with friction energy dissipation as described in the present invention can effectively consume earthquake energy. Since the pressure between the friction energy dissipation component and the main cylinder can be easily changed, the sliding friction between the two can be changed, and the mechanical energy is converted into heat energy. At the same time, the shear energy dissipation component is used to dissipate shear deformation. Therefore, the structure has a good shock-absorbing effect under the action of earthquakes of different intensities, and has a simple structure, easy manufacturing, flexible layout, easy installation, high operating efficiency and low maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 This is a schematic diagram of the structure of the composite damper described in Example 1.

[0064] Figure 2 yes Figure 1 Left view of .

[0065] Figure 3 for Figure 1 Cross-sectional view along the BB direction.

[0066] Figure 4 for Figure 3 Cross-sectional view along the CC direction.

[0067] Figure 5 This is a schematic diagram of the structure of the composite damper described in Example 2.

[0068] Icons: 1-left ear plate; 2-adjusting nut one; 3-adjusting nut two; 4-auxiliary cylinder; 5-friction rod; 6-outer cylinder; 7-inner wedge block; 8-outer wedge block; 9-lead core; 10-end cover; 11-sealing ring; 12-main cylinder; 13-right ear plate; 14-stop block; 15-spring. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0070] Example 1

[0071] See also Figure 1-Figure 4 This embodiment proposes a composite damper, including a left ear plate 1 and a right ear plate 13, wherein the left ear plate 1 is fixedly connected to the pier through an anchor assembly, and the right ear plate 13 is fixedly connected to the bridge beam through an anchor assembly.

[0072] The left ear plate 1 is connected to the auxiliary cylinder 4 as a whole through a threaded pair, the right ear plate 13 is connected to the main cylinder 12 as a whole through a threaded pair, the auxiliary cylinder 4 and the main cylinder 12 are provided with an outer tube 6, the outer tube 6 is connected to the auxiliary cylinder 4 as a whole through a threaded pair, and the main cylinder 12 and the auxiliary cylinder 4 are provided with a limiting groove to play a limiting role. Specifically, one end of the main cylinder 12 extends into the auxiliary cylinder 4, the main cylinder 12 is provided with a limiting groove, the auxiliary cylinder 4 is provided with a matching protrusion, and the end of the main cylinder 12 is provided with a protrusion that is stuck in the groove of the auxiliary cylinder 4 to achieve the above-mentioned limiting role.

[0073] A shear energy dissipation component is provided between the master cylinder 12 and the outer cylinder 6 , and a friction energy dissipation component is provided inside the master cylinder 12 .

[0074] The friction energy dissipation component includes a friction rod 5, an inner wedge block 7 and an outer wedge block 8. The friction rod 5 is threadedly connected to the left ear plate 1 and extends into the interior of the auxiliary cylinder 4 and the main cylinder 12. The inner wedge block 7 is sleeved on the friction rod 5 and is limited by the stop block 14 at the end of the friction rod 5; the outer wedge block 8 is sleeved on the inner wedge block 7, and the outer wedge block 8 abuts against the inner wall of the master cylinder 12.

[0075] The friction rod 5 is a bolt rod, including a rod portion and a head portion, the rod portion is threaded, the stopper 14 is the head portion of the friction rod 5 , and the inner wedge block 7 is clamped between the adjusting nut 2 3 and the head portion of the friction rod 5 .

[0076] The inner wedge block 7 includes two inner wedge block units arranged opposite to each other, with a gap between them. The outer wedge block 8 includes a plurality of outer wedge block units arranged in a closed manner, with a gap between two adjacent outer wedge block units, and the gap can be changed by the inner wedge block 7. The inner wedge block 7 can squeeze the outer wedge block 8, change the positive pressure between the outer wedge block 8 and the inner wall of the master cylinder 12, so as to automatically adjust the size of the sliding friction force, thereby obtaining different damping forces, which can simultaneously meet the shock absorption requirements of the structure during strong and weak earthquakes.

[0077] The left ear plate 1 is provided with an adjusting nut 2, and the friction rod 5 is provided with an adjusting nut 2 3. The axial direction of the adjusting nut 2 and the adjusting nut 2 3 is consistent with the axial direction of the friction rod 5. The adjusting nut 2 and the adjusting nut 2 3 are adapted to each other. The adjusting nut 2 and the adjusting nut 2 3 form a gear transmission pair, and the inner wedge block 7 and the outer wedge block 8 are squeezed by adjusting the gear transmission pair.

[0078] The shear energy dissipation component includes a lead core 9, which is embedded in the gap ring groove between the main cylinder 12 and the outer cylinder 6. The lead core 9 is a lead ring with a hollow ring structure.

[0079] An end cover 10 is provided between the outer cylinder 6 and the master cylinder 12 , and the outer cylinder 6 and the end cover 10 are threadedly connected.

[0080] The auxiliary cylinder 4 and the end cover 10 are both provided with a lead core collecting groove, and the auxiliary cylinder 4 and the end cover 10 are both provided with a sealing groove, and a sealing ring 11 is installed in the sealing groove, and the sealing ring 11 is a metal sealing ring. The auxiliary cylinder 4, the end cover 10 and the metal sealing ring are used to seal the lead core 9 in the gap ring groove between the main cylinder 12 and the outer cylinder 6. At the same time, the auxiliary cylinder 4 and the end cover 10 are provided with a lead core collecting groove to prevent lead from overflowing and polluting the environment. Specifically, the auxiliary cylinder 4 and the end cover 10 are both provided with a lead core collecting groove and two sealing grooves.

[0081] In the event of an earthquake, when the horizontal thrust of the transverse bridge is transmitted to the right ear plate 13 through the structure, the main cylinder 12 moves to the left relative to the auxiliary cylinder 4 under the action of external force, which increases the friction resistance between the friction unit (inner wedge block 7, outer wedge block 8) and the inner wall of the main cylinder 12, thereby achieving shock absorption and energy consumption, and at the same time drives the lead core 9 between the outer cylinder 6 and the main cylinder 12 to produce shear deformation, and the energy generated by the external force is converted into thermal energy of the lead core 9, further reducing shock absorption and energy consumption.

[0082] In the event of an earthquake, when the horizontal tensile force of the cross bridge is transmitted to the right ear plate 13 through the structure, the main cylinder 12 moves to the right relative to the auxiliary cylinder 4 under the action of external force, which increases the friction resistance between the friction unit (inner wedge block 7, outer wedge block 8) and the inner wall of the main cylinder 12, thereby achieving shock absorption and energy consumption, and at the same time drives the lead core 9 between the outer tube 6 and the main cylinder 12 to produce shear deformation, and the energy generated by the external force is converted into thermal energy of the lead core 9, further reducing shock absorption and energy consumption.

[0083] Example 2

[0084] The difference between this embodiment and embodiment 1 is that, see Figure 5 A spring 15 is provided between the stopper 14 and the inner wedge block 7 to minimize the attenuation of the preload force.

[0085] Example 3

[0086] The difference between this embodiment and embodiment 1 is that the gear transmission pair between the adjusting nut 1 2 and the adjusting nut 2 3 is replaced by a worm gear or the like.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A composite damper, characterized in that: The invention comprises a left ear plate (1) and a right ear plate (13), wherein the left ear plate (1) is connected to the auxiliary cylinder (4), and the right ear plate (13) is connected to the main cylinder (12); an outer cylinder (6) is provided on the outer sleeves of the auxiliary cylinder (4) and the main cylinder (12); a shear energy dissipation component is provided between the main cylinder (12) and the outer cylinder (6); and a friction energy dissipation component is provided inside the main cylinder (12); The left ear plate (1) and the auxiliary cylinder (4) are connected as a whole through a threaded pair, the right ear plate (13) and the main cylinder (12) are connected as a whole through a threaded pair, and the outer cylinder (6) and the auxiliary cylinder (4) are connected as a whole through a threaded pair; The friction energy dissipation component comprises a friction rod (5), an inner wedge block (7) and an outer wedge block (8); the friction rod (5) is connected to the left ear plate (1); the inner wedge block (7) is sleeved on the friction rod (5); the outer wedge block (8) is sleeved on the inner wedge block (7); and the outer wedge block (8) abuts against the inner wall of the master cylinder (12); A stopper (14) is provided at the end of the friction pull rod (5) for limiting the position of the inner wedge block (7); The left ear plate (1) is provided with an adjusting nut 1 (2), and the friction pull rod (5) is provided with an adjusting nut 2 (3). The adjusting nut 1 (2) and the adjusting nut 2 (3) form a gear transmission pair, and the inner wedge block (7) and the outer wedge block (8) are squeezed by adjusting the gear transmission pair. The shear energy dissipation component comprises a lead core (9), wherein the lead core (9) is embedded in a gap ring groove between the main cylinder (12) and the outer cylinder (6).

2. The composite damper according to claim 1, characterized in that: An elastic component is provided between the stopper (14) and the inner wedge block (7).

3. The composite damper according to claim 1, characterized in that: An end cap (10) is provided at the end of the lead core (9), and the outer cylinder (6) is threadedly connected to the end cap (10).

4. The composite damper according to claim 3, characterized in that: The auxiliary cylinder (4) and the end cover (10) are both provided with lead core collecting grooves.

5. The composite damper according to claim 3, characterized in that: The auxiliary cylinder (4) and the end cover (10) are both provided with a sealing groove, and a sealing ring (11) is installed in the sealing groove.

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