Bidirectional self-resetting SMA damper

Abstract

The utility model relates to a bi-directional self-resetting SMA damper which comprises a shell, two sliding blocks are arranged in the shell in a sliding mode, two limiting plates are arranged between the two sliding blocks at intervals, a plurality of SMA studs are connected between the two sliding blocks, the upper end face and the lower end face of each sliding block are designed to be inclined faces, and the limiting plates are arranged between the two sliding blocks. A plurality of SMA single-head studs are correspondingly arranged at the upper end and the lower end of the shell in the sliding direction of the sliding blocks at intervals, the lengths of the SMA single-head studs are gradually increased from inside to outside, stress rods are arranged on the two sliding blocks, a cylindrical protrusion is arranged on the stress rod between the two sliding blocks, an end cover is arranged at one end of the shell, a sealing cover is arranged at the other end of the shell, and the sealing cover is arranged on the shell. A pull ring is arranged on the end cover, and a through hole for the stress rod to stretch out is formed in the sealing cover. The self-resetting energy-dissipating device has the advantages of being reasonable in structural design, higher in energy-dissipating capacity, higher in self-resetting capacity and the like.

Description

Technical fields:

[0001] This utility model relates to the field of damper technology, specifically to a bidirectional self-resetting SMA damper. Background technology:

[0002] Shape memory alloys (SMAs) are a typical type of smart metallic material with unique properties such as shape memory effect, hyperelasticity, and high damping. They have important applications in key components and core systems in the national economy and defense sectors. For research on the properties of SMA materials, please refer to my previously published doctoral dissertation—Stochastic Dynamics of Typical Shape Memory Alloy Systems.

[0003] In technical R&D collaborations with construction companies, it was discovered that the SMA dampers currently used by these companies operate on the principle of unidirectional resetting of SMA material combined with friction for energy dissipation and vibration reduction. Specific structures can be referenced from Chinese patents: a variable friction self-resetting SMA damper (authorization announcement number: CN 222333012 U) and a Chinese patent for a self-resetting sliding friction damper based on SMA (application announcement number: CN 111962698A). Both of these technical solutions utilize SMA material in the damper to fully leverage its self-resetting capability. However, this type of SMA damper has relatively limited friction energy dissipation and resetting ability, failing to meet higher seismic resistance and vibration reduction requirements. Based on the company's requirements, upgrades and improvements are being made to the existing SMA dampers to further enhance their energy dissipation and vibration reduction capabilities.

[0004] It should be noted that the above content falls within the inventor's technical knowledge and does not necessarily constitute prior art. Utility model content:

[0005] The purpose of this invention is to solve the problems existing in the prior art and provide a bidirectional self-resetting SMA damper. It overturns the design concept of existing dampers that use SMA material for unidirectional reset and friction energy dissipation. It creatively adopts bidirectional SMA material and has the advantages of reasonable structural design, stronger energy dissipation capacity and stronger self-resetting capacity.

[0006] This utility model achieves the above objectives by adopting the following technical solutions:

[0007] A bidirectional self-resetting SMA damper includes a housing, within which two sliders are slidably disposed, and two limiting plates are spaced apart between the two sliders. Multiple SMA double-ended studs are connected between the two sliders. The upper and lower end faces of the sliders are designed as inclined surfaces. Correspondingly, multiple SMA single-ended studs are spaced apart at the upper and lower ends of the housing along the sliding direction of the sliders, and the length of the SMA single-ended studs gradually increases from the inside to the outside. Force rods are provided on the two sliders, and cylindrical protrusions are provided on the force rods between the two sliders. One end of the housing is provided with an end cap, and the other end is provided with a sealing cap. A pull ring is provided on the end cap, and a through hole is provided on the sealing cap for the force rods to extend out.

[0008] The housing includes an upper plate and a lower plate arranged vertically at intervals. A front plate is provided at the front end between the upper plate and the lower plate, and a rear plate is provided at the rear end. Slide rails are provided on the inner sides of the front plate and the rear plate. Slide grooves matching the slide rails are provided on both sides of the corresponding slider. Limiting plates are provided on the inner sides of the upper plate and the lower plate respectively.

[0009] The SMA double-ended stud is fastened to the slider by a nut.

[0010] The SMA single-headed stud is fastened to the upper or lower plate by a nut.

[0011] The lower end of the SMA single-head stud is designed to be spherical.

[0012] The end cap and sealing cap are respectively installed on the upper plate and the lower plate by bolts.

[0013] The present invention adopts the above technical solution, which can bring the following beneficial effects:

[0014] (1) By designing SMA double-ended studs and SMA single-ended studs, the tensile strength in both the lateral and longitudinal directions is improved, thereby enhancing seismic performance. (2) By arranging the length of the SMA single-ended stud to increase with the inclined surface on the slider, it can achieve better energy dissipation than friction and has self-resetting capability, making its energy dissipation capacity more durable and reliable compared to traditional friction plates. (3) By designing two sliders and matching limit plates, SMA single-ended studs, SMA double-ended studs, etc., it can function effectively under both compression and tension. Attached image description:

[0015] Figure 1 This is a front view of the bidirectional self-resetting SMA damper of this utility model;

[0016] Figure 2 This is a top view of the bidirectional self-resetting SMA damper of this utility model;

[0017] Figure 3 for Figure 2 Sectional view along line AA in the middle;

[0018] Figure 4 This is a schematic diagram illustrating the sliding principle of the slider of this utility model;

[0019] Figure 5 This is a schematic diagram of the bidirectional self-resetting SMA damper of this utility model under tensile force.

[0020] In the diagram, 1. Housing, 101. Upper plate, 102. Lower plate, 103. Front plate, 104. Rear plate, 2. Slider, 3. Limiting plate, 4. SMA double-ended stud, 5. Inclined surface, 6. SMA single-ended stud, 7. Force rod, 8. Cylindrical protrusion, 9. End cap, 10. Pull ring, 11. Sealing cap, 12. Through hole, 13. Slide rail, 14. Slide groove, 15. Nut, 16. Spherical, 17. Bolt. Detailed implementation method:

[0021] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0023] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "provided with," "set up," "connected," and "connected" should be interpreted broadly. For example, "provided with" and "set up" can refer to fixed installation, detachable installation, or integration; "connected" can refer to direct connection or connection through an intermediate medium; and "connected" in this application mainly refers to the interconnection of air passages. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0025] like Figure 1-4As shown, a bidirectional self-resetting SMA damper includes a housing 1. Two sliders 2 are slidably disposed within the housing 1. Two limiting plates 3 are spaced apart between the two sliders 2. Multiple SMA double-ended studs 4 are connected between the two sliders 2. Here, the SMA double-ended studs 4 refer to double-ended studs made of SMA material. The upper and lower end faces of the sliders 2 are designed as inclined surfaces 5. Correspondingly, multiple SMA single-ended studs 6 are spaced apart at the upper and lower ends of the housing 1 along the sliding direction of the sliders. Here, the SMA single-ended studs 6 refer to single-ended studs made of SMA material, and the length of the SMA single-ended studs 6 gradually increases from the inside to the outside (e.g., ...). Figure 3 As shown, (matching the inclined surface 5 of slider 2), both sliders 2 are provided with force-bearing rods 7, and the force-bearing rods 7 between the two sliders 2 are provided with cylindrical protrusions 8. One end of the housing 1 is provided with an end cap 9, and the other end is provided with a sealing cap 11. The end cap 9 is provided with a pull ring 10, and the sealing cap 11 is provided with a through hole 12 for the force-bearing rod 7 to extend out. By designing SMA double-ended studs 4 and SMA single-ended studs 6, the tensile strength in both the lateral and longitudinal directions is improved, thereby improving the seismic performance. By arranging the length of the SMA single-ended stud 6 to increase with the inclined surface 5 on the slider 2, it can play a better energy dissipation role than friction, and has self-resetting ability. Compared with traditional friction plates, its energy dissipation ability is more durable and reliable. By designing two sliders 2 and matching limiting plates 3, SMA single-ended studs 6, SMA double-ended studs 4, etc., it can play a role whether under compression or tension. In practical applications, the pull ring 10 and the force-bearing rods 7 are connected to the building respectively.

[0026] The housing 1 includes an upper plate 101 and a lower plate 102 arranged vertically at intervals. A front plate 103 is provided at the front end between the upper plate 101 and the lower plate 102, and a rear plate 104 is provided at the rear end. Slide rails 13 are provided on the inner sides of the front plate 103 and the rear plate 104. Slide grooves 14 matching the slide rails 13 are provided on both sides of the corresponding slider 2. Limiting plates 3 are provided on the inner sides of the upper plate 101 and the lower plate 102. The specific structure of the housing 1 is given, realizing the sliding design of the slider and facilitating the installation of various components.

[0027] The SMA double-ended stud 4 is fastened to the slider 2 by a nut 15. The threaded connection ensures a secure and reliable installation.

[0028] The SMA single-ended stud 6 is fastened to the upper plate 101 or the lower plate 102 by a nut 15. The threaded connection is firm and reliable, and the length is adjustable.

[0029] The lower end of the SMA single-head stud 6 is designed as a spherical shape 16. The spherical shape 16 facilitates its fit with the inclined surface 5.

[0030] The end cap 9 and the sealing cap 11 are respectively installed on the upper plate 101 and the lower plate 102 by bolts 17. This facilitates disassembly, assembly, and subsequent maintenance.

[0031] Instructions for use of a bidirectional self-resetting SMA damper according to this application:

[0032] (1) When the force-bearing rod 7 is not subjected to any force, the SMA single-ended stud 6 and the SMA double-ended stud 4 will not deform, such as Figure 5 As shown in Figure (a).

[0033] (2) When the force-bearing rod 7 is subjected to tension, it pulls the right slider 2 to the right. At this time, the left slider 2 will not move to the right under the action of the limiting plate 3. Therefore, the SMA double-ended stud 4 is first subjected to force and deforms to play a role in energy dissipation. Figure 5 As shown in Figure (b); when the tension reaches the set value, the inclined surface 5 contacts the SMA single-ended stud 6, and the SMA single-ended stud 6 begins to deform. At this time, the SMA double-ended stud 4 and the SMA single-ended stud 6 work together to dissipate energy, as shown in Figure (b). Figure 5 As shown in Figure (c).

[0034] (3) After the tension disappears, the system is reset under the action of the SMA double-ended stud 4 and the SMA single-ended stud 6, such as... Figure 5 As shown in Figure (d) in the diagram.

[0035] When the force-bearing rod 7 is subjected to pressure, its energy dissipation principle is the same as that of the tension rod described above.

[0036] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0037] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A bidirectional self-resetting SMA damper, characterized in that, The device includes a housing, within which two sliders are slidably mounted. Two limiting plates are spaced apart between the two sliders. Multiple SMA double-ended studs connect the two sliders. The upper and lower end faces of the sliders are designed as inclined surfaces. Correspondingly, multiple SMA single-ended studs are spaced apart at the upper and lower ends of the housing along the sliding direction of the sliders, with the length of the SMA single-ended studs gradually increasing from the inside to the outside. Each slider has a force-bearing rod, and the force-bearing rod between the two sliders has a cylindrical protrusion. One end of the housing has an end cap, and the other end has a sealing cap. The end cap has a pull ring, and the sealing cap has a through hole for the force-bearing rod to extend out.

2. The bidirectional self-resetting SMA damper according to claim 1, characterized in that, The housing includes an upper plate and a lower plate arranged vertically at intervals. A front plate is provided at the front end between the upper plate and the lower plate, and a rear plate is provided at the rear end. Slide rails are provided on the inner sides of the front plate and the rear plate. Slide grooves matching the slide rails are provided on both sides of the corresponding slider. Limiting plates are provided on the inner sides of the upper plate and the lower plate respectively.

3. A bidirectional self-resetting SMA damper according to claim 1 or 2, characterized in that, The SMA double-ended stud is fastened to the slider by a nut.

4. A bidirectional self-resetting SMA damper according to claim 3, characterized in that, The SMA single-headed stud is fastened to the upper or lower plate by a nut.

5. A bidirectional self-resetting SMA damper according to claim 4, characterized in that, The lower end of the SMA single-head stud is designed to be spherical.

6. A bidirectional self-resetting SMA damper according to claim 5, characterized in that, The end cap and sealing cap are respectively installed on the upper plate and the lower plate by bolts.

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