An initial closed double-chain cable displacement amplification viscous damper

Abstract

The application relates to the field of shock-absorbing dampers, and discloses an initial locking double-chain cable type displacement amplification viscous damper which comprises a damper shell, outer gears are symmetrically fixedly connected to the two ends of a rotating shaft, locking base bodies are symmetrically and slidably connected to the two sides of the damper shell, the outer gears are fixedly connected to the outer sides of the locking base bodies through locking rods, and transmission chains are meshedly connected to the bottoms of the outer gears. The initial locking double-chain cable type displacement amplification viscous damper is locked by the locking rods when the damper is in an initial state and suffers from small external actions, the overall damper is in a locked state, additional rigidity is provided for a structure, when the structure suffers from large external excitations, the force applied to the damper exceeds the stress limit value of the locking rods, the locking rods are broken, the damper enters a working state, the rotating shaft drives the damping plate to rotate, and the damping liquid is sheared to dissipate energy.

Description

Technical Field

[0001] This invention relates to the field of vibration dampers, specifically to an initial-locked double-chain cable-driven displacement amplification viscous damper. Background Technology

[0002] my country's geographical location at the intersection of the Mediterranean-South Asia seismic belt and the Circum-Pacific seismic belt results in frequent earthquakes characterized by high intensity and destructive power. Structural damping technology, as a passive structural control technique, can effectively reduce structural seismic response and improve structural safety. Viscous dampers, widely used in practical engineering, dissipate energy through the shearing and compression of damping materials or the flow resistance within a sealed cavity. They offer advantages such as simple construction, low cost, and high reliability.

[0003] Conventional viscous dampers lack additional stiffness. When a structure experiences wind-induced vibrations or frequent earthquakes, it undergoes small inter-story deformations. In such cases, the conventional viscous damper deforms along with the structure. Due to the small deformation amplitude, it dissipates less energy, resulting in poor structural response control under small deformation conditions. Inventing a viscous damper that initially restricts structural deformation in a locked state and then increases its energy dissipation capacity by amplifying displacement after operation has remained a challenging engineering problem. Summary of the Invention

[0004] The purpose of this invention is to provide an initially locked double-chain cable-type displacement amplification viscous damper. In the initial state, the damper is in a locked state, which restricts the deformation between structural layers. As the external excitation increases, when the force on the damper exceeds the locking force limit, the locking device fails, and the damper enters the working state to dissipate energy. The energy dissipation capacity is improved through the displacement amplification structural characteristics.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an initial locking double-chain cable-driven displacement amplification viscous damper, comprising a damper housing, the damper housing being filled with damping fluid, a damping plate being rotatably connected to the inner side of the damper housing via a rotating shaft, external gears being symmetrically fixedly connected to both ends of the rotating shaft, a locking base body being symmetrically slidably connected to both sides of the damper housing, the external gears being fixedly connected to the outer side of the locking base body via locking rods, and a transmission chain being meshed with the bottom of the external gears.

[0006] Preferably, the damper housing has first through holes symmetrically opened on both sides, and the rotating shaft passes through the first through holes.

[0007] Preferably, the rotating shaft is fixedly connected to the damping plate, and the radius of the damping plate is larger than the radius of the external gear.

[0008] Preferably, the damper housing has symmetrical locking base mounting grooves on both sides, and the locking base body is slidably connected inside the damper housing.

[0009] Preferably, the external gear has a second through hole, the locking base body has a threaded hole, and the locking rod passes through the second through hole and is threaded into the threaded hole.

[0010] Preferably, the locking rod is connected to the outside of the external gear via a spring, and the spring wraps around the outside of the locking rod.

[0011] Preferably, the locking rod has a concave fracture groove.

[0012] Preferably, the transmission chain is a flexible chain.

[0013] Preferably, chain end plates are fixedly connected between the ends of the two transmission chains, and steel cables are fixedly connected to the outer side of the chain end plates.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. This initially locked double-chain cable-stayed displacement amplification viscous damper locks the damper's working state through a locking system. When the damper is initially under a small external load, the damper experiences a small force, and the shear force generated by the relative rotation between the external gear and the damper housing is less than the breaking force limit of the locking rod. The damper is in a non-deformable locked state, providing greater additional stiffness to the structure and reducing inter-story deformation. As the external load increases, the force on the damper increases, and the shear force generated by the relative rotation between the external gear and the damper housing exceeds the breaking force limit of the locking rod, causing the locking rod to fracture brittlely. The locking system fails, and the damper enters an energy-dissipating working state, reducing the structural dynamic response.

[0016] 2. This initial locking double-chain cable-driven displacement amplification viscous damper enables rapid maintenance and replacement of the locking system. After the locking rod breaks, the locking base body can be slid upwards to the top along the locking base mounting groove. The locking base body can then be removed from the mounting groove and replaced with a new locking base body. The new locking base body is placed in the mounting groove and slid to the bottom. The threaded hole of the sliding base is aligned with the reserved through hole of the external gear. The new locking rod is then passed through the reserved through hole of the external gear and fixedly connected to the threaded hole of the sliding base, thus enabling rapid maintenance and replacement of the locking system.

[0017] 3. This initial-locking double-chain cable-stayed displacement-amplifying viscous damper improves the energy dissipation capacity of the damper through the principle of rotational displacement amplification. The external gear, rotating shaft, and damping plate are designed with the same central axis. When the external gear rotates, it drives the damping plate to rotate through the rotating shaft. The radius of the damping plate is larger than the radius of the external gear. By adjusting the ratio of the radius of the damping plate to the radius of the external gear, the rotational displacement amplification factor can be adjusted. This achieves the effect of larger damper deformation on the basis of smaller interlayer deformation, thereby improving the energy dissipation capacity of the damper. Attached Figure Description

[0018] Figure 1 This is a side cross-sectional view of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the damper housing, first through hole, locking base mounting groove, locking base body and threaded hole connection structure of the present invention.

[0021] In the diagram: 1. Damper housing; 2. Damping plate; 3. Rotating shaft; 4. First through hole; 5. External gear; 6. Locking base mounting groove; 7. Locking base body; 8. Second through hole; 9. Locking rod; 10. Spring; 11. Threaded hole; 12. Drive chain; 13. Chain end plate; 14. Steel cable. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1 to 3 The present invention provides a technical solution: an initial locking double-chain cable displacement amplification viscous damper, including a damper shell 1, the damper shell 1 being filled with damping fluid, a damping plate 2 being rotatably connected to the inner side of the damper shell 1 via a rotating shaft 3, external gears 5 being symmetrically fixedly connected to both ends of the rotating shaft 3, a locking base body 7 being symmetrically slidably connected to both sides of the damper shell 1, the external gears 5 being fixedly connected to the outer side of the locking base body 7 via locking rods 9, and a transmission chain 12 being meshed with the bottom of the external gears 5.

[0024] In this embodiment, as Figure 1 and Figure 3 As shown, the damper housing 1 has symmetrical first through holes 4 on both sides, the rotating shaft 3 passes through the first through hole 4, and the rotation of the external gear 5 can drive the rotating shaft 3 and the damping plate 2 to rotate.

[0025] In this embodiment, as Figure 1 and Figure 2 As shown, the rotating shaft 3 is fixedly connected to the damping plate 2, and the radius of the damping plate 2 is larger than the radius of the external gear 5. The rotation of the external gear 5 can drive the damping plate 2 to rotate. The displacement amplification factor can be adjusted by adjusting the ratio of the radii of the two. The purpose of amplifying the displacement of the damper is achieved by rotation, thereby further improving the energy dissipation capacity of the damper and reducing the dynamic response of the structure.

[0026] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the damper housing 1 has symmetrical locking base mounting slots 6 on both sides. The locking base body 7 is slidably connected inside the damper housing 1. The locking base body 7 can slide in the locking base mounting slot 6. After the locking base body 7 is slid down to the bottom, the external gear 5 can be fixed together with the locking base body 7 by the locking rod 9. After the locking base body 7 is slid up to the top, it can be removed from the locking base mounting slot 6, which facilitates quick maintenance and replacement.

[0027] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the external gear 5 has a second through hole 8, and the locking base body 7 has a threaded hole 11. The locking rod 9 passes through the second through hole 8 and is threaded into the threaded hole 11. The locking base body 7 can slide in the locking base mounting groove 6. When the locking base body 7 slides down to the bottom, the threaded hole 11 is aligned with the second through hole 8, and the locking rod 9 can pass through the second through hole 8 and be screwed into the threaded hole 11.

[0028] In this embodiment, as Figure 1 and Figure 2 As shown, the locking rod 9 is connected to the outside of the external gear 5 through the spring 10, and the spring 10 is wrapped around the outside of the locking rod 9. After the locking rod 9 is tightened, the spring 10 is in a pre-compression state.

[0029] In this embodiment, as Figure 1 and Figure 2As shown, a concave fracture groove is provided on the locking rod 9. When the structure is subjected to small external excitations such as wind load, subway vibration or frequent earthquakes, the force on the damper is less than the preset fracture limit of the locking rod 9. The damper is always in a locked state, providing greater additional stiffness and limiting the displacement response of the structure under small external excitations. When the structure is subjected to large external excitations such as rare earthquakes, the shear force between the external gear 5 and the damper housing 1 exceeds the preset fracture limit of the locking rod 9. The locking rod 9 fractures brittlely at the preset concave fracture groove. The pre-compressed spring 10 ejects the external gear 5 corresponding to the fractured part of the locking rod 9 out of the damper, preventing the locking rod 9 from hindering the deformation of the overall damper. After the locking rod 9 fractures, the damper enters the working state.

[0030] In this embodiment, as Figure 1 and Figure 2 As shown, the transmission chain 12 is a flexible chain, which is fixedly connected to the ground or floor through the base plate of the damper housing 1. The flexible transmission chain 12 is fitted and installed with the external gear 5.

[0031] In this embodiment, as Figure 1 and Figure 2 As shown, chain end plates 13 are fixedly connected between the ends of the two transmission chains 12, and steel cables 14 are fixedly connected to the outer side of the chain end plates 13. The transmission chains 12 are fixed to the beam-column joint areas on both sides by the two ends of the steel cables 14. The steel cables 14 and the transmission chains 12 are in a taut state. At this time, the damper is in the initial locked state. The locking rod 9 locks the components of the damper, providing greater additional stiffness to the structure and limiting structural deformation.

[0032] The method of use and advantages of this invention: The working process of this initially locked double-chain cable-stayed displacement amplification viscous damper is as follows:

[0033] like Figures 1 to 3As shown: After the locking base body 7 is installed into the locking base mounting groove 6 and slids down to the bottom, the external gear 5 can be fixed together with the locking base body 7 using the locking rod 9. The damper housing 1 is fixedly connected to the ground or floor through the bottom plate. After the flexible transmission chain 12 is installed in conjunction with the external gear 5, it is fixed to the beam-column joint area on both sides by the two ends of the steel cable 14. The steel cable 14 and the transmission chain 12 are in a taut state. At this time, the damper is in the initial locking state. The locking rod 9 locks all the components of the damper. The damper provides additional stiffness to the structure, limiting structural deformation. When the structure is subjected to minor external excitations such as wind loads, subway vibrations, or frequent earthquakes, the force on the damper is less than the preset fracture limit of the locking rod 9, and the damper remains locked, providing additional stiffness and limiting the displacement response of the structure under minor external excitations. When the structure is subjected to major external excitations such as rare earthquakes, the shear force between the external gear 5 and the damper housing 1 exceeds the preset fracture limit of the locking rod 9, and the damper remains locked. The locking rod 9 fractures brittlely at the pre-set concave fracture groove. The pre-compressed spring 10 ejects the broken part of the external gear 5 corresponding to the locking rod 9 from the outside of the damper, preventing the locking rod 9 from hindering the overall deformation of the damper. After the locking rod 9 fractures, the damper enters the working state. During the interlayer deformation of the structure, the external gear 5 is driven to rotate through the flexible transmission chain 12 and the steel cable 14. During the rotation of the external gear 5, the damping plate 2 is driven to rotate through the rotating shaft 3. During the rotation of the damping plate 2, it rotates relative to the damper shell 1. During the relative rotation, the shearing effect on the damping fluid plays a role in energy dissipation. The radius of the damping plate 2 is larger than the radius of the external gear 5. The rotation of the external gear 5 drives the rotation of the damping plate 2. The displacement amplification factor can be adjusted by adjusting the ratio of the radii of the two. The purpose of amplifying the damper displacement is achieved by rotation, which further improves the energy dissipation capacity of the damper and reduces the dynamic response of the structure. After the locking base body 7 is slid upward to the top, the locking base body 7 can be removed from the locking base mounting slot 6 to achieve quick maintenance and replacement.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0035] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An initial-locked double-chain cable-driven displacement amplification viscous damper, comprising a damper housing (1), characterized in that: The damper housing (1) is filled with damping fluid. The inner side of the damper housing (1) is rotatably connected to a damping plate (2) via a rotating shaft (3). External gears (5) are symmetrically fixedly connected to both ends of the rotating shaft (3). Locking base bodies (7) are symmetrically slidably connected to both sides of the damper housing (1). The external gears (5) are fixedly connected to the outer side of the locking base bodies (7) via locking rods (9). A transmission chain (12) is meshed with the bottom of the external gears (5). The external gear (5) has a second through hole (8), the locking base body (7) has a threaded hole (11), and the locking rod (9) passes through the second through hole (8) and is threaded into the threaded hole (11). The locking rod (9) is provided with a concave fracture groove, which constitutes the preset fracture part of the locking rod (9); The locking rod (9) fixes the external gear (5) to the locking base body (7) together, and the damper is in the initial locking state; when the shear force between the external gear (5) and the damper housing (1) exceeds the preset fracture limit of the locking rod (9), the locking rod (9) undergoes brittle fracture at the preset concave fracture groove, and the damper enters the working state.

2. The initial-locking double-chain cable-driven displacement amplification viscous damper according to claim 1, characterized in that: The damper housing (1) has symmetrical first through holes (4) on both sides, and the rotating shaft (3) passes through the first through holes (4).

3. The initial-locking double-chain cable-driven displacement amplification viscous damper according to claim 1, characterized in that: The rotating shaft (3) is fixedly connected to the damping plate (2), and the radius of the damping plate (2) is greater than the radius of the external gear (5).

4. The initial-locking double-chain cable-driven displacement amplification viscous damper according to claim 1, characterized in that: The damper housing (1) has symmetrical locking base mounting slots (6) on both sides, and the locking base body (7) is slidably connected inside the damper housing (1).

5. The initial-locking double-chain cable-driven displacement amplification viscous damper according to claim 1, characterized in that: The locking rod (9) is connected to the outside of the external gear (5) via a spring (10), and the spring (10) is wrapped around the outside of the locking rod (9).

6. The initial-locking double-chain cable-driven displacement amplification viscous damper according to claim 1, characterized in that: The transmission chain (12) is a flexible chain.

7. The initial-locking double-chain cable-driven displacement amplification viscous damper according to claim 1, characterized in that: Chain end plates (13) are fixedly connected between the ends of the two transmission chains (12), and steel cables (14) are fixedly connected to the outside of the chain end plates (13).

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