Initial locking double-chain inhaul cable type displacement amplification viscous damper

Abstract

The invention relates to the field of shock absorption dampers, and discloses an initial locking double-chain inhaul cable type displacement amplification viscous damper which comprises a damper shell, outer gears are symmetrically and fixedly connected to the two ends of a rotating shaft, and locking base bodies are symmetrically and slidably connected to the two sides of the damper shell. The outer gear is fixedly connected to the outer side of the locking base body through a locking rod, and the bottom of the outer gear is connected with a transmission chain in an engaged mode. According to the initial locking double-chain inhaul cable type displacement amplification viscous damper, rotation of the outer gear is limited through the locking rod under the conditions that the damper is in an initial state and suffers from small external action, the whole damper is in a locking state, additional rigidity is provided for the structure, and when the structure suffers from large external excitation action, the external gear is locked. And when the force applied to the damper exceeds the stress limit value of the locking rod, the locking rod is broken, the damper enters a working state, the damping plate is driven to rotate through the rotating shaft, and shearing energy dissipation is conducted on the damping liquid.

Description

Technical Field

[0001] The present invention relates to the field of shock absorbing dampers, in particular to an initially locked double-chain cable-type displacement amplifying viscous damper. Background Art

[0002] my country's geographical location at the intersection of the Mediterranean-South Asian seismic belt and the Pacific Rim seismic belt results in frequent earthquakes characterized by high intensity and destructiveness. Structural vibration reduction technology, as a passive structural control technique, can effectively reduce the seismic response of structures and improve their safety. Viscous dampers, a widely used vibration reduction device in practical engineering, dissipate energy through the shear 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 is subjected to wind vibration or frequent earthquakes, small interlayer deformations occur. At this point, the dampers deform along with the structure. However, due to the small deformation amplitude, the energy dissipated is also small, making them less effective in controlling structural response under small deformation conditions. The development of a viscous damper that initially locks to limit structural deformation and then amplifies displacement to increase energy dissipation has long been a difficult engineering challenge. Summary of the Invention

[0004] The purpose of the present invention is to provide an initially locked double-chain cable-type displacement amplifying viscous damper. In the initial state, the damper is in a locked state as a whole, limiting the deformation between structural layers. As the external excitation increases, the force applied to the damper exceeds the locking force limit, and the locking device fails. The damper enters the working state to dissipate energy, thereby improving the energy dissipation capacity through the displacement amplification structural characteristics.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an initially locked double-chain cable-type displacement amplifying viscous damper, comprising a damper housing, the damper housing being filled with damping fluid, the inner side of the damper housing being rotatably connected to a damping plate via a rotating shaft, the two ends of the rotating shaft being symmetrically fixedly connected to external gears, the two sides of the damper housing being symmetrically slidably connected to a locking base body, the external gear being fixedly connected to the outer side of the locking base body via a locking rod, and the bottom of the external gear being meshedly connected to a transmission chain.

[0006] Preferably, first through holes are symmetrically opened on both sides of the damper housing, 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 greater than the radius of the external gear.

[0008] Preferably, locking base mounting grooves are symmetrically provided on both sides of the damper housing, and the locking base body is slidably connected in the damper housing.

[0009] Preferably, a second through hole is provided on the external gear, a threaded hole is provided on the locking base body, and the locking rod passes through the second through hole and is threadedly connected in the threaded hole.

[0010] Preferably, the locking rod is connected to the outer side of the external gear through a spring, and the spring is wrapped around the outer side of the locking rod.

[0011] Preferably, a concave fracture groove is provided on the locking rod.

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

[0013] Preferably, a chain end plate is fixedly connected between the ends of the two transmission chains, and a steel cable is fixedly connected to the outer side of the chain end plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The initially locked double-chain cable-type displacement amplifying viscous damper achieves locking of the damper working state through a locking system. When the damper is initially in a small external load state, the damper is subjected to 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 for the structure and reducing deformation between structural layers. 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-consuming working state, reducing the dynamic response of the structure.

[0016] 2. The initial locking double-chain cable-type displacement amplifying viscous damper can realize the rapid maintenance and replacement of the locking system. After the locking rod breaks, the locking base body is slid upward along the locking base mounting groove to the top, and the locking base body can be removed from the mounting groove. A new locking base body is replaced and placed into the mounting groove and slid to the bottom. The reserved threaded hole of the sliding base is aligned with the reserved through hole of the external gear. The new locking rod is passed through the reserved through hole of the external gear and fixedly connected to the reserved threaded hole of the sliding base, thereby realizing the rapid maintenance and replacement of the locking system.

[0017] 3. This initially locked double-chain cable-type displacement-amplifying viscous damper improves the damper's energy dissipation capacity through the principle of rotational displacement amplification. The external gear, rotating shaft, and damping plate are designed with a coaxial axis. When the external gear rotates, the damping plate is driven to rotate through the rotating shaft. The damping plate radius is larger than the external gear radius. By adjusting the ratio of the damping plate radius to the external gear radius, the rotational displacement amplification factor can be adjusted. This achieves a larger damper deformation effect on the basis of smaller interlayer deformation, thereby improving the damper's energy dissipation capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the side cross-sectional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

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

[0021] In the figure: 1. Damper housing; 2. Damper 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. Transmission chain; 13. Chain end plate; 14. Steel cable. DETAILED DESCRIPTION

[0022] 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] See also Figures 1 to 3 The present invention provides a technical solution: an initially locked double-chain cable-type displacement amplifying viscous damper, comprising a damper housing 1, the damper housing 1 being filled with damping fluid, the inner side of the damper housing 1 being rotatably connected to a damping plate 2 via a rotating shaft 3, the two ends of the rotating shaft 3 being symmetrically fixedly connected to external gears 5, the two sides of the damper housing 1 being symmetrically slidably connected to a locking base body 7, the external gear 5 being fixedly connected to the outer side of the locking base body 7 via a locking rod 9, and the bottom of the external gear 5 being meshedly connected to a transmission chain 12.

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

[0025] In this embodiment, 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 is adjusted by adjusting the ratio of the two radii. The purpose of damper displacement amplification is achieved through rotation, further improving the energy consumption capacity of the damper and reducing the dynamic response of the structure.

[0026] In this embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, locking base mounting grooves 6 are symmetrically provided on both sides of the damper housing 1, and the locking base body 7 is slidably connected to the damper housing 1. The locking base body 7 can slide in the locking base mounting groove 6. After sliding the locking base body 7 downward to the bottom end, the locking rod 9 can be used to fix the external gear 5 and the locking base body 7 together. After sliding the locking base body 7 upward to the top end, it can be taken out from the locking base mounting groove 6, which is convenient for quick maintenance and replacement.

[0027] In this embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, a second through hole 8 is provided on the external gear 5, a threaded hole 11 is provided on the locking base body 7, the locking rod 9 passes through the second through hole 8 and is threadedly connected to 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 downward to the bottom end, 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, Figure 1 and Figure 2 As shown, the locking rod 9 is connected to the outer side of the external gear 5 through a spring 10, and the spring 10 is wrapped around the outer side of the locking rod 9. After the locking rod 9 is tightened, the spring 10 is in a pre-stressed state.

[0029] In this embodiment, Figure 1 and Figure 2As shown, a concave fracture groove is provided on the locking rod 9. When the structure is subjected to smaller external excitations such as wind loads, subway vibrations or frequent earthquakes, the force applied to 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 smaller external excitations. When the structure is subjected to larger external excitations such as rare earthquakes, the shear force between the outer gear 5 and the damper housing 1 exceeds the preset fracture limit of the locking rod 9. The locking rod 9 breaks brittlely at the preset concave fracture groove, and the pre-stressed spring 10 ejects the broken part of the outer gear 5 corresponding to the locking rod 9 out of the damper to prevent the locking rod 9 from interfering with the deformation of the overall damper. After the locking rod 9 breaks, the damper enters the working state.

[0030] In this embodiment, 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 bottom plate of the damper housing 1, and the flexible transmission chain 12 is fitted with the outer gear 5.

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

[0032] The use method and advantages of the present invention: The initial locking double-chain cable-type displacement amplifying viscous damper works as follows:

[0033] like Figures 1 to 3As shown: After the locking base body 7 is installed into the locking base installation groove 6 and slides down to the bottom, the locking rod 9 can be used to fix the outer gear 5 and the locking base body 7 together, and the bottom plate of the damper housing 1 is fixed to the ground or floor. After the flexible transmission chain 12 is fitted with the outer gear 5, the two ends of the steel cable 14 are respectively fixed to the beam node area on both sides. The steel cable 14 and the transmission chain 12 are in a taut state as a whole. At this time, the damper is in the initial locking state, and the damper components are locked by the locking rod 9. The structure is fixed, providing greater additional stiffness to limit structural deformation. When the structure is subjected to smaller external excitations such as wind loads, subway vibrations or frequent earthquakes, the force applied to 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 to limit the displacement response of the structure under smaller external excitations. When the structure is subjected to larger external excitations such as rare earthquakes, the shear force between the outer gear 5 and the damper housing 1 exceeds the preset fracture limit of the locking rod 9, and the damper is locked. The locking rod 9 breaks brittlely at the preset concave fracture groove, and the pre-stressed spring 10 pops the broken part of the outer gear 5 corresponding to the locking rod 9 out of the damper to prevent the locking rod 9 from interfering with the deformation of the overall damper. After the locking rod 9 breaks, the damper enters the working state. During the interlayer deformation of the structure, the flexible transmission chain 12 and the steel cable 14 drive the outer gear 5 to rotate. During the rotation of the outer 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 housing 1. During the relative rotation, the shear effect of the damping fluid is consumed. The radius of the damping plate 2 is larger than the radius of the outer gear 5. The rotation of the outer gear 5 drives the damping plate 2 to rotate. The displacement amplification factor is adjusted by adjusting the ratio of the two radii. The purpose of damper displacement amplification is achieved by rotation, further improving the energy dissipation capacity of the damper and reducing 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 above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

[0035] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships 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 devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the protection content of the present invention.

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

Claims

1. An initially locked double-chain cable-type displacement-amplifying 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), both ends of the rotating shaft (3) are symmetrically fixedly connected to external gears (5), both sides of the damper housing (1) are symmetrically slidably connected to a locking base body (7), the external gear (5) is fixedly connected to the outer side of the locking base body (7) via a locking rod (9), and the bottom of the external gear (5) is meshedly connected to a transmission chain (12).

2. The initially locked double-chain cable-type displacement-amplifying viscous damper according to claim 1, characterized in that: First through holes (4) are symmetrically provided on both sides of the damper housing (1), and the rotating shaft (3) passes through the first through holes (4).

3. The initially locked double-chain cable-type displacement-amplifying 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 initially locked double-chain cable-type displacement-amplifying viscous damper according to claim 1, characterized in that: Locking base mounting grooves (6) are symmetrically provided on both sides of the damper housing (1), and the locking base body (7) is slidably connected in the damper housing (1).

5. The initially locked double-chain cable-type displacement-amplifying viscous damper according to claim 1, characterized in that: The outer gear (5) is provided with a second through hole (8), the locking base body (7) is provided with a threaded hole (11), and the locking rod (9) passes through the second through hole (8) and is threadedly connected in the threaded hole (11).

6. The initial locking double-chain cable-type displacement amplifying viscous damper according to claim 1, characterized in that: The locking rod (9) is connected to the outer side of the external gear (5) through a spring (10), and the spring (10) is wrapped around the outer side of the locking rod (9).

7. The initially locked double-chain cable-type displacement-amplifying viscous damper according to claim 1, characterized in that: A concave fracture groove is provided on the locking rod (9).

8. The initially locked double-chain cable-type displacement-amplifying viscous damper according to claim 1, characterized in that: The transmission chain (12) is a flexible chain.

9. The initially locked double-chain cable-type displacement-amplifying viscous damper according to claim 1, characterized in that: A chain end plate (13) is fixedly connected between the ends of the two transmission chains (12), and a steel cable (14) is fixedly connected to the outer side of the chain end plate (13).

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