Double-order self-resetting-variable friction energy dissipation damper
By designing a double-order self-reset-variable friction energy-consuming damper, a friction component composed of push-pull rod, friction plate and wedge block, as well as a large disc and small disc spring return component, the problem of insufficient self-resetting ability of the friction damper is solved, and effective energy consumption and self-resetting under different vibration intensities is achieved, and load-bearing capacity and shock absorption effect are improved.
Patent Information
- Application Number
- CN202510963905.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-14
- Publication Date
- 2025-08-12
AI Technical Summary
The existing friction dampers lack self-reset function, and have large load-bearing capacity and residual deformation. The traditional construction dampers lack the load-bearing capacity and self-reset ability.
A double-step self-reset-variable friction energy-consuming damper is designed, using an outer sleeve, friction assembly and reset assembly. The friction assembly consists of a push rod, a friction plate and a wedge block. The reset assembly consists of a large disc spring and a small disc spring, which provides self-reset capability through the coordinated work of the wedge block and the spring.
It realizes effective energy consumption and self-resetting under different vibration intensities. The components are easy to obtain and cost, which is easy to replace, and improves the load-bearing capacity and shock absorption effect of the damper.
Smart Images
Figure CN120465612A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of anti-seismic and vibration-reducing of building structures, in particular to a double-stage self-resetting and variable friction energy dissipation damper. Background Art
[0002] Friction energy dissipation dampers generate damping mainly through friction between metal and metal and between metal and non-metal, thereby consuming energy from earthquakes and reducing the damage caused by earthquakes to buildings. They are widely used in the engineering field.
[0003] Among the reset materials, the fiber tendons are prone to brittle fracture and are difficult to anchor; the SMA tendons are highly temperature sensitive and expensive; and the coil springs have low load-bearing capacity.
[0004] Traditional friction dampers generate relative displacement, dissipating energy through friction and lacking a self-reset function. This results in significant residual deformation and low load-bearing capacity. Current solutions rely on ramps or arc-shaped structures to provide restoring force, but single-slope or arc-shaped dampers suffer from insufficient load-bearing capacity and self-reset capabilities. Summary of the Invention
[0005] The purpose of this application is to provide a dual-stage self-resetting variable friction energy dissipation damper, aiming to solve the problems in the prior art.
[0006] The embodiment of the present application provides a two-stage self-resetting-variable friction energy dissipation damper, including an outer sleeve, a friction assembly and a reset assembly. A mounting groove is provided in the middle of the outer sleeve. The friction assembly includes a push-pull rod, a friction plate and two friction blocks. The push-pull rod is arranged in the mounting groove. The friction plate is laid on the inner wall of the mounting groove. The two friction blocks are slidably sleeved on the push-pull rod and are respectively located at the two ends of the push-pull rod. The friction block is composed of baffles on both sides and a wedge-shaped block group located between the baffles. The wedge block group includes an outer wedge block, a middle wedge block and an inner wedge block. There are two middle wedge blocks in total and the two middle wedge blocks are arranged in front and behind. The outer wedge block is located between the two middle wedge blocks. The outer wedge block is arranged along the periphery of the middle wedge block. The inner wedge block is located inside the middle wedge block and is arranged opposite to the outer wedge block. The outer side surface of the outer wedge block is in contact with the friction plate. The reset assembly is located outside the push-pull rod between the two friction blocks. The reset assembly includes several large disc springs and small disc springs.
[0007] Furthermore, the outer end of the push-pull rod is located outside the outer sleeve, and the inner end of the push-pull rod is located inside the outer sleeve.
[0008] Furthermore, a nut is provided at the inner end, and the diameter of the outer end is larger than the diameter of the push-pull rod.
[0009] Furthermore, the outer wedge block includes a plurality of independent wedge-shaped body units, and the plurality of independent wedge-shaped body units are sequentially spliced along the periphery of the middle wedge block to form a circular wedge block.
[0010] Furthermore, a plurality of the small disc springs and the large disc springs are arranged to penetrate the push-pull rod axially, and the small disc springs are arranged inside the large disc springs.
[0011] Furthermore, a plurality of the large disc springs are spaced apart, and a plurality of the small disc springs are in close contact with each other.
[0012] The beneficial effects of the present invention are: by symmetrically arranging the friction blocks and the reset disc springs between the two groups of friction blocks to work together, energy can be consumed regardless of whether tension or pressure is applied, and the disc springs are always in a compressed state, providing self-resetting ability; at the same time, the components of the present invention are easy to obtain, easy to assemble, low in cost, and easy to replace. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic structural diagram of the wedge block group of the present invention; Figure 3 It is a schematic structural diagram of the reset assembly of the present invention; Figure 4 for Figure 1 Schematic diagram of the cross section at the inner end of the push-pull rod; Figure 5 for Figure 1 A schematic diagram of the inner cross-section of the internal friction stop; Figure 6 for Figure 1 A schematic cross-sectional view of the outer baffle of the inner friction block; Figure 7 for Figure 1 Cross-sectional diagram of the reset component.
[0014] In the picture: 1-outer sleeve; 2-friction plate; 3-baffle I; 4-baffle II; 5-baffle III; 6-baffle IV; 7-nut; 8-push-pull rod; 9-first middle wedge block; 10-first outer wedge block; 11-first inner wedge block; 12-second middle wedge block; 13-second outer wedge block; 14-second inner wedge block; 15-small disc spring; 16-large disc spring. DETAILED DESCRIPTION
[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.
[0016] like Figures 1 to 7 The double-stage self-resetting-variable friction energy dissipation damper shown in the figure comprises an outer sleeve 1, a friction assembly and a reset assembly. A mounting groove is provided in the middle of the outer sleeve 1. The friction assembly comprises a push-pull rod 8, a friction plate 2 and two friction blocks. The push-pull rod 8 is arranged in the mounting groove. The outer sleeve 1 coincides with the central axis of the push-pull rod 8. At the same time, the outer end of the mounting groove is closed, and the friction block can be blocked in the mounting groove. The friction plate 2 is laid on the inner wall of the mounting groove. The two friction blocks are slidably sleeved on the push-pull rod 8 and are respectively located at the two ends of the push-pull rod 8. The friction block consists of baffles on both sides and a wedge-shaped block group located between the baffles. Taking the outer end friction block as an example, Figure 2 The wedge block group includes an outer wedge block 10, a middle wedge block 9, and an inner wedge block 11. There are two middle wedge blocks 9, and the two middle wedge blocks 9 are arranged in a front-to-rear manner. The outer wedge block 10 is located between the two middle wedge blocks 9 and arranged along the periphery of the middle wedge block 9. The inner wedge block 11 is located inside the middle wedge block 9 and opposite the outer wedge block 10. The outer surface of the outer wedge block 10 contacts the friction plate 2. Each type of wedge block has a trapezoidal cross-section, and both the front and rear sides of the wedge block are friction surfaces. When the three wedge block positions are set, the friction surfaces contact each other. The reset assembly is located outside the push-pull rod 8 between the two friction blocks, and the reset assembly includes a plurality of large disc springs 16 and a plurality of small disc springs 15 .
[0017] The outer end of the push-pull rod 8 is located outside the outer sleeve 1 , and the inner end of the push-pull rod 8 is located inside the outer sleeve 1 .
[0018] A nut 7 is provided at the inner end, and the diameter of the outer end is larger than the diameter of the push-pull rod 8. The nut 7 can abut against the baffle Ⅱ4 of the friction block located inside the push-pull rod to limit it. Similarly, the outer end can also abut against the baffle Ⅳ6 of the friction block located at the outer end of the push-pull rod 8 to limit it.
[0019] The outer wedge block 10 includes a plurality of independent wedge-shaped units, and the plurality of independent wedge-shaped units are sequentially spliced along the periphery of the middle wedge block to form a circular wedge block.
[0020] A plurality of the small disc springs 15 and the large disc springs 16 are sequentially arranged to penetrate the push-pull rod 8 axially, and the small disc springs 15 are arranged inside the large disc springs 16 .
[0021] Several large disc springs 16 are spaced apart, and several small disc springs 15 are closely attached to each other. Both small disc springs 15 and large disc springs 16 are conical, disc-shaped, thin springs with a central opening. The inner diameter of the small disc spring 15 is slightly larger than the diameter of the push-pull rod 8, while the outer diameter of the small disc spring 15 is slightly smaller than the outer diameter of the large disc spring 16. The outer diameter of the large disc spring 16 is slightly smaller than the inner diameter of the friction plate 2. The small disc springs 15 and large disc springs 16 are placed within the outer sleeve 1, located between the baffles of the two friction blocks and in contact with both. The push-pull rod 8 extends through the small disc springs 15 and large disc springs 16, and both are always under pressure when in operation.
[0022] Segmented energy dissipation of the reset component: under the action of small shock, only the small disc spring 15 and the outer wedge blocks 10 and 13 on the two friction blocks and the friction plate 2 are needed to dissipate the vibration energy together. The spacing of the large disc spring 16 is reduced, but no compression deformation occurs. After the shock, it relies on the spring restoring force of the small disc spring 15 to reset; under the action of large shock, the large disc spring 16 has no spacing, and the small disc spring 15, the large disc spring 16 and the outer wedge blocks 10 and 13 on the two friction blocks and the friction plate 2 dissipate the vibration energy together. After the shock, it relies on the spring restoring force of the small disc spring 15 and the large disc spring 16 to reset, thereby realizing two-stage energy dissipation.
[0023] The entire damper is divided into the following two motion states: For ease of understanding, Figure 1 The parts on the external friction block are respectively marked as baffle III 5, baffle IV 6, the first middle wedge block 9, the first outer wedge block 10, and the first inner wedge block 11; the parts on the internal friction block are respectively marked as baffle I 3, baffle II 4, the second middle wedge block 12, the second outer wedge block 13, and the second inner wedge block 14.
[0024] Tensile state: When push-pull rod 8 is subjected to tension, the tension is transmitted through nut 7 at the inner end of push-pull rod 8 to baffle II 4 on the internal friction block. Baffle II 4 causes second middle wedge 12 to generate normal positive pressure along the friction surface, which is transmitted to second outer wedge 13. Second outer wedge 13 and friction plate 2 generate friction in the opposite direction of motion. Baffle I 3 puts the internal disc spring assembly in a compressed state, and baffle III 5, baffle IV 6, and first outer wedge 10 at the other end do not experience relative displacement. If the tension is removed at a certain moment, the spring restoring force of the disc spring causes second middle wedge 12, second outer wedge 13, second inner wedge 14, baffle I 3, and baffle II 4 to move in the opposite direction. There is no extrusion or friction between second outer wedge 13 and friction plate 2.
[0025] Pressure state: When push-pull rod 8 is subjected to pressure, the pressure is transmitted to baffle IV6 through the first end of push-pull rod 8. Baffle IV6 causes first middle wedge block 9 to generate normal positive pressure along the friction surface, which is transmitted to first outer wedge block 10. First outer wedge block 10 and friction plate 2 generate friction in the opposite direction of movement. Baffle III5 keeps the disc spring in a compressed state, and baffle I3, baffle II4, and second outer wedge block 13 at the other end do not produce relative displacement. If the pressure is removed at a certain moment, the spring restoring force of the disc spring causes first middle wedge block 9, first outer wedge block 10, first inner wedge block 11, baffle III5, and baffle IV6 to move in the opposite direction. There is no squeezing force or friction between first outer wedge block 10 and friction plate 2.
[0026] The above embodiments are not limitations of the present invention. Unless otherwise clearly specified and limited, the terms "setting", "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the scope of the technical solution of the present invention also fall within the scope of protection of the present invention. In addition, the technical features involved in the different embodiments of the present application described above can be combined with each other as long as they do not conflict with each other.
[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
Claims
1. A two-stage self-resetting variable friction energy dissipation damper, characterized in that: The invention comprises an outer sleeve, a friction assembly and a reset assembly. A mounting groove is provided in the middle of the outer sleeve. The friction assembly comprises a push-pull rod, a friction plate and two friction blocks. The push-pull rod is arranged in the mounting groove. The friction plate is laid on the inner wall of the mounting groove. The two friction blocks are slidably sleeved on the push-pull rod and are respectively located at the two ends of the push-pull rod. The friction block is composed of baffles on both sides and a wedge block group located between the baffles. The wedge block group includes an outer wedge block, a middle wedge block and a shaped block and an inner wedge-shaped block, there are two middle wedge-shaped blocks in total and the two middle wedge-shaped blocks are arranged front and back, the outer wedge-shaped block is located between the two middle wedge-shaped blocks, the outer wedge-shaped block is arranged along the periphery of the middle wedge-shaped block, the inner wedge-shaped block is located inside the middle wedge-shaped block and is arranged opposite to the outer wedge-shaped block, the outer side surface of the outer wedge-shaped block is in contact with the friction plate, the reset assembly is located outside the push-pull rod between the two friction blocks, and the reset assembly includes a plurality of large disc springs and small disc springs.
2. The dual-stage self-resetting variable friction energy dissipation damper according to claim 1, characterized in that: The outer end of the push-pull rod is located outside the outer sleeve, and the inner end of the push-pull rod is located inside the outer sleeve.
3. The dual-stage self-resetting variable friction energy dissipation damper according to claim 2, characterized in that: A nut is provided at the inner end, and the diameter of the outer end is larger than the diameter of the push-pull rod.
4. The dual-stage self-resetting variable friction energy dissipation damper according to claim 1, characterized in that: The outer wedge block includes a plurality of independent wedge-shaped body units, and the plurality of independent wedge-shaped body units are sequentially spliced along the periphery of the middle wedge block to form a circular wedge block.
5. The dual-stage self-resetting variable friction energy dissipation damper according to claim 1, characterized in that: A plurality of small disc springs and large disc springs are arranged to penetrate the push-pull rod axially, and the small disc springs are arranged inside the large disc springs.
6. The dual-stage self-resetting variable friction energy dissipation damper according to claim 5, characterized in that: There are intervals between the plurality of large disc springs, and the plurality of small disc springs are closely attached to each other.