Friction-damping device with adjustable parameters for optimizing the effect of acceleration control

Abstract

The present application relates to the damping device of adjustable parameter for optimizing the effect of acceleration control and belongs to the technical field of structural vibration control. The device comprises a shell, a transmission mechanism, an energy dissipation mechanism, a photoelectric detection control system and a lifting mechanism. The transmission mechanism is composed of two one-way bearings with opposite working directions, a synchronous wheel and a belt. The energy dissipation mechanism is composed of an electromagnet and a friction steel plate. The photoelectric detection control system comprises a photoelectric switch, a light axis and a light-shielding cloth. The lifting mechanism is mainly composed of a lifting block and an equidistant support. Through the above structure, the damping force and the adjustable angle displacement are realized, the hysteresis curve can be controlled according to the actual demand, and the device has the characteristics of stable output and flexible regulation.

Description

Technical Field

[0001] This invention relates to a damping device, and more particularly to a chamfered friction damping device with adjustable parameters for optimizing acceleration control, belonging to the field of structural vibration control technology. Background Technology

[0002] With the increasing complexity and height of building structures, structural vibration control technology has gradually become a research hotspot in the field of civil engineering. Energy dissipation and vibration reduction, as one of the passive control methods, relies on the introduction of specific damping devices (i.e., energy dissipators) to utilize structural deformation to provide additional damping, dissipating the energy transmitted into the structure and thus reducing its seismic response. Common energy dissipation and vibration reduction devices include friction dampers, viscous dampers, and metal yield dampers, which improve the seismic performance of structures to a certain extent. However, current vibration reduction technologies still have certain limitations. For example, while energy dissipators can effectively control the displacement response of a structure, they may also lead to an increase in the absolute acceleration response. Therefore, how to effectively control the acceleration response of a structure while reducing its displacement response remains a problem that urgently needs to be solved.

[0003] To further improve the seismic performance of structures, negative stiffness dampers, as a novel type of vibration reduction device, have gradually attracted widespread attention from the academic and engineering communities. Firstly, due to limitations in their generation mechanism, negative stiffness dampers suffer from complex construction and unstable hysteretic energy dissipation, hindering their widespread adoption. Secondly, existing negative stiffness designs are typically based on small displacements, which may lead to excessive structural displacement under strong earthquakes, resulting in isolator shear failure or structural performance degradation. This issue necessitates finding the optimal balance between reducing displacement and controlling acceleration in the design of negative stiffness dampers to ensure structural safety under strong earthquakes. Furthermore, the introduction of negative stiffness dampers may reduce structural stiffness, leading to large displacement responses under relatively small excitation conditions. Addressing the shortcomings of existing negative stiffness dampers in terms of complexity and energy dissipation stability, there is an urgent need to develop a simplified device capable of efficient operation under both small and large displacement conditions, achieving both good energy dissipation and stable displacement and acceleration control capabilities, thereby ensuring structural safety under various seismic excitations. Summary of the Invention

[0004] To address the aforementioned deficiencies in the existing technology, this invention proposes a chamfered friction damping device with adjustable parameters for optimizing acceleration control. This device can improve the problem of insufficient acceleration control in traditional damping devices and achieve the goal of adjustable parameters.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A chamfered friction damping device for optimizing acceleration control with adjustable parameters, comprising a housing, a transmission mechanism, an energy dissipation mechanism, a photoelectric detection and control system, and a lifting mechanism; The energy-consuming mechanism consists of an electromagnet and a friction steel plate. The upper ends of the electromagnet and the friction steel plate are tightly attached. An extension steel pipe is provided on the electromagnet, and the extension steel pipe extends into the conduit. The conduit is bolted to the upper panel of the outer shell through a conduit constraint plate. The transmission mechanism consists of two one-way bearings with opposite working directions, a synchronous pulley, and a belt. The one-way bearings are in close contact with the lower end of the friction steel plate. The one-way bearings and the synchronous pulleys are arranged coaxially. The synchronous pulleys mesh with the belt to achieve transmission. The one-way bearings and the synchronous pulleys are connected to the front and rear panels of the outer casing through a first optical axis. The first optical axis is connected to the external pulley through a flat key. The photoelectric detection and control system consists of a photoelectric switch, a second optical axis, and a light-shielding cloth. The photoelectric switch is fixed to a trigger plate, which is connected to the rear panel of the outer casing by bolts. The end pulley is connected to the trigger plate via the second optical axis, and the light-shielding cloth is connected to the second optical axis via a fixing ring. The external pulley and the end pulley are also connected by belt meshing to achieve transmission. The lifting mechanism consists of a lifting block and four equidistant supports. The four equidistant supports are divided into two groups and are respectively set on both sides of the lifting block. The lifting block is connected to the handle by a long bolt. A third optical axis passes through the inside of the lifting block and is hinged to the lower end of the equidistant supports. The equidistant supports are connected to the front and rear panels of the outer shell by limiting parts. The limiting parts slide in the groove of the outer shell.

[0007] Furthermore, the angle friction damping device also includes a resistance control system, which consists of an adjustable resistor, and the electromagnet is connected in series with the adjustable resistor.

[0008] Furthermore, rubber strips are wound around the lower end of the friction steel plate and the outer ring of the one-way bearing to transmit the movement of the friction steel plate to the one-way bearing. The one-way bearing is configured to only allow it to move in the direction of the equilibrium position, and the movement is further transmitted to the optical axis through the synchronous pulley and belt drive system. A tensioning device is also provided on the outside of the trigger plate to tension the belt between the end pulley and the outer pulley.

[0009] Furthermore, the diameter of the synchronous pulley coaxially arranged with the one-way bearing is four times the diameter of the synchronous pulley coaxially arranged with the lifting block, and the outer pulley is coaxially arranged with the lifting block, and its diameter is four times the diameter of the end pulley.

[0010] Furthermore, the photoelectric switch on the trigger plate can monitor the motion status in real time. When the light-shielding cloth rotates to block the laser, it triggers the photoelectric switch to control the power supply status of the electromagnet. This allows the working state of the one-way bearing to be correlated with the magnetic force of the electromagnet, thereby achieving the purpose of angle setting in the bilinear hysteresis model.

[0011] Furthermore, the lifting block is connected to the handle via a long bolt, and the handle can drive the lifting block to move vertically relative to the bottom plate of the device housing; the third optical axis passes through the lifting block and is hinged to the lower end of the equidistant bracket, and the vertical movement of the lifting block is converted into directional sliding of the equidistant bracket within a preset groove; the upper end of the equidistant bracket is connected to the limiting part, and both the limiting part and the one-way bearing are connected to the first optical axis via a flat key; the distance between the two one-way bearings can be adjusted by shaking the handle.

[0012] Furthermore, the one-way bearing and the synchronous pulley are connected by a flat key in the keyway; the flat key is used to limit the relative rotation between the one-way bearing and the synchronous pulley; the two synchronous pulleys are respectively arranged on both sides of the two one-way bearings, and drive the third optical axis where the lifting block is located to rotate through the belt, so that the two one-way bearings can realize hysteresis curves under different motion states respectively.

[0013] Furthermore, the length of the friction steel plate, the distance of the one-way bearing, and the displacement limit satisfy the following relationship: L=l 0 +2×d ; L Indicates the length of the friction steel plate. l 0 represents the distance between two one-way bearings. d This represents the failure displacement; by adjusting the spacing of the one-way bearings, the failure displacement can be adjusted to achieve the adjustment of the hysteresis model for different angle displacements.

[0014] Furthermore, the electromagnet is connected in series with the adjustable resistor, and the damping force generated by the damping device is inversely proportional to the square of the resistance value of the adjustable resistor.

[0015] Furthermore, the friction steel plate has a threaded hole at its end that is connected to a linear drive shaft. The linear drive shaft, through a linear flange bearing inside the housing, is used to control the linear movement of the friction steel plate.

[0016] By adopting the above technical solution, the present invention has at least one of the following beneficial effects compared with the prior art: 1. The damping component of the device mainly consists of the magnetic force generated when an electromagnet is energized, which in turn generates frictional force by pressing against a friction steel plate. By controlling the resistance value of an adjustable resistor, the electromagnetic attraction force is controlled, thereby controlling the magnitude of the damping force of the damping device. The damping device achieved by this method features adjustable damping and stable output force. Furthermore, this damping device overcomes the problems of sudden friction changes, meshing gaps, and jamming inherent in traditional gear and rack transmission devices.

[0017] 2. The angle of the damping device is mainly achieved through the lifting mechanism. By shaking the handle at the lower end of the device, the distance between the two one-way bearings can be adjusted symmetrically, thereby controlling the position where the one-way bearings disengage from the friction steel plate, thus achieving the purpose of adjustable hysteresis curve angle parameters.

[0018] 3. This damping device uses a multi-stage variable speed synchronous pulley mechanism, which can effectively amplify structural displacement. The end pulley can accurately identify the motion state of the structure and achieve timely control of the electromagnet's working state at the chamfer position. This design not only improves the device's recognition accuracy of the structural response but also ensures the reliability of the chamfer position control, thus achieving the effect of dual control of displacement and acceleration. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention (concealing the front panel, top panel, and resistor device of the outer casing). Figure 2 This is a three-dimensional structural diagram from another perspective of the present invention; Figure 3 This is a three-dimensional structural diagram of the present invention from another perspective (hiding one side panel of the front of the outer casing). Figure 4 This is a three-dimensional structural diagram of the present invention from another perspective (hiding one side panel on the back of the outer casing). Figure 5 This is a side view of the present invention (concealing the end plate and resistor device on one side of the housing). Figure 6 This is a schematic diagram of the transmission mechanism of the present invention; Figure 7 This is a schematic diagram of the energy consumption mechanism of the present invention; Figure 8 This is a schematic diagram of the lifting mechanism of the present invention; Figure 9 The results of the hysteretic loading test of the present invention under constant loading period conditions with an external resistance of 0Ω and a chamfer displacement of 10, 20, and 30 mm. Figure 10 The results of the hysteretic loading test of the present invention under constant loading period conditions with a chamfer displacement of 20 mm and an applied resistance of 30, 60, and 90 Ω. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-10 The present invention will be further described in detail below to facilitate a clear understanding of the invention, but these descriptions do not constitute a limitation thereof.

[0021] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, 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 this invention.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] As attached Figure 1-8 As shown in the figure, a chamfered friction damping device for optimizing acceleration control and with adjustable parameters in this embodiment includes a housing 1, a transmission mechanism, an energy dissipation mechanism, a photoelectric detection and control system, and a lifting mechanism.

[0024] like Figure 1-3 As shown in Figure 6, the transmission mechanism consists of two one-way bearings 4 with opposite working directions, a synchronous pulley 8, and a belt 9. The one-way bearings 4 are tightly fitted to the lower end of the friction steel plate 3, and the one-way bearings 4 and synchronous pulleys 8 are arranged coaxially. The synchronous pulleys 8 and belt 9 mesh to achieve transmission. The one-way bearings 4 and synchronous pulleys 8 are connected to the front and rear panels of the outer casing 1 via a first optical shaft 140, which is connected to the external pulley 24 via a flat key 20. Rubber strips are wound around the lower end of the friction steel plate 3 and the outer ring of the one-way bearings 4 to transmit the movement of the friction steel plate 3 to the one-way bearings 4. The one-way bearings 4 are configured to only allow movement towards the equilibrium position, and this movement is further transmitted to the optical shaft through the transmission system of the synchronous pulleys 8 and belt 9.

[0025] In this embodiment, the one-way bearing 4 and the synchronous pulley 8 are connected by a flat key 20 in the keyway. The flat key 20 is used to limit the relative rotation between the one-way bearing 4 and the synchronous pulley 8. The two synchronous pulleys 8 are respectively arranged on both sides of the two one-way bearings 4, and drive the third optical axis 142 where the lifting block 10 is located to rotate through the belt 9, so that the two one-way bearings 4 can realize hysteresis curves under different motion states respectively.

[0026] In this embodiment, the diameter of the synchronous pulley 8 coaxially arranged with the one-way bearing 4 is four times the diameter of the synchronous pulley 8 coaxially arranged with the lifting block 10. The outer pulley 24 is coaxially arranged with the lifting block 10, and its diameter is four times the diameter of the end pulley 28.

[0027] like Figure 4 As shown in Figure 7, the energy-consuming mechanism consists of an electromagnet 2 and a friction steel plate 3. The upper ends of the electromagnet 2 and the friction steel plate 3 are tightly fitted together. An extension steel pipe 21 is provided on the electromagnet 2, and the extension steel pipe 21 extends into the conduit 5. The conduit 5 is bolted to the upper panel of the outer shell 1 through a conduit constraint plate 6. A stiffening plate 7 is also provided between the conduit constraint plate 6 and the outer shell 1.

[0028] like Figure 1-5 As shown, the photoelectric detection and control system consists of a photoelectric switch 29, a second optical axis 141, and a light-shielding cloth 17. The photoelectric switch 29 is fixed to a trigger plate 22, which is connected to the rear panel of the outer casing 1 by bolts. The end pulley 28 is connected to the trigger plate 22 via the second optical axis 141, and the light-shielding cloth 17 is connected to the second optical axis 141 via a fixing ring 23. The external pulley 24 and the end pulley 28 are also connected by a belt 9 for transmission. The photoelectric switch 29, mounted on the trigger plate 22, can monitor the motion status in real time. When the light-shielding cloth 17 rotates to block the laser, it triggers the photoelectric switch 29 to operate, thereby controlling the power supply status of the electromagnet 2. This correlates the working state of the one-way bearing 4 with the magnetic force of the electromagnet 2, thus achieving the purpose of angle clipping in the bilinear hysteresis model.

[0029] like Figure 8 As shown, the lifting mechanism consists of a lifting block 10 and four equidistant supports 11. The four equidistant supports 11 are divided into two groups and are respectively set on both sides of the lifting block 10. The lifting block is connected to the handle 26 by a long bolt 25. A third optical axis 142 passes through the inside of the lifting block 10 and is hinged to the lower end of the equidistant supports 11. The equidistant supports 11 are connected to the front and rear panels of the outer shell 1 by limiting parts 12. The limiting parts 12 slide in the groove of the outer shell 1.

[0030] The lifting block 10 is connected to the handle 26 via a long bolt 25. The handle 26 can drive the lifting block 10 to move vertically relative to the bottom plate of the device housing 1. The third optical axis 142 passes through the lifting block 10 and is hinged to the lower end of the equidistant bracket 11. The vertical movement of the lifting block 10 is converted into directional sliding of the equidistant bracket 11 within a preset groove. The upper end of the equidistant bracket 11 is connected to the limiting part 12. The limiting part 12 and the one-way bearing 4 are both connected to the first optical axis 140 via a flat key 20. The distance between the two one-way bearings 4 can be adjusted by shaking the handle 26. In addition, a tensioning device 5 is provided on the outside of the trigger plate 22 to tension the belt 9 between the end pulley 28 and the outer pulley 24. The tensioning device 5 adjusts the tension force via a tension spring 16.

[0031] In this embodiment, the length of the friction steel plate 3, the distance between the one-way bearings 4, and the displacement limit satisfy the following relationship: L = l0 + 2 × d. L represents the length of the friction steel plate 3, l0 represents the distance between the two one-way bearings 4, and d represents the failure displacement. By adjusting the spacing of the one-way bearings 4, the failure displacement can be adjusted to achieve the adjustment of the hysteresis model for different angle displacements.

[0032] The angle friction damping device also includes a resistance control system, which consists of an adjustable resistor 27, with the electromagnet 2 connected in series with the adjustable resistor 27. The damping force generated by the damping device is inversely proportional to the square of the resistance value of the adjustable resistor 27.

[0033] like Figure 1 , 3 / 4-5 and Figure 7 As shown, the friction steel plate 3 has a threaded hole at its end that is connected to the linear drive shaft 19. The linear drive shaft 19 is used to control the linear movement of the friction steel plate 3 through the linear flange bearing 18 inside the housing 1.

[0034] Example 2 The hysteresis loading test results of the adjustable cuff friction damping device provided in Embodiment 1 of this application under constant loading period conditions, with an applied resistance of 0Ω and cuff displacements of 10mm, 20mm, and 30mm, are as follows: Figure 7 As shown, it can symmetrically adjust the angle displacement limit during loading and unloading, providing failure displacements of different sizes.

[0035] Example 3 The hysteresis loading test results of the adjustable chamfer friction damping device provided in Embodiment 1 of this application under constant loading period conditions with a chamfer displacement of 20mm and an external resistance of 30, 60, and 90Ω are as follows: Figure 8 As shown, it can provide different damping forces by adjusting the resistance value of the adjustable resistor. The above is merely a preferred embodiment of the present invention and does not constitute any limitation on the structure of the present invention. The arrangement and quantity of the present invention are not limited to this example and can be optimized according to actual engineering conditions. Any modifications, equivalent changes, and decorations made to the above embodiments based on the technical principles of the present invention without departing from the scope of the present invention's technical solution are still within the scope of the present invention's technical solution.

Claims

1. A chamfered friction damping device for optimizing acceleration control with adjustable parameters, characterized in that: It includes the outer shell (1), transmission mechanism, energy consumption mechanism, photoelectric detection and control system, and lifting mechanism; The energy-consuming mechanism consists of an electromagnet (2) and a friction steel plate (3). The upper ends of the electromagnet (2) and the friction steel plate (3) are tightly attached. An extension steel pipe (21) is provided on the electromagnet (2). The extension steel pipe (21) extends into the conduit (5). The conduit (5) is bolted to the upper panel of the outer shell (1) through the conduit constraint plate (6). The transmission mechanism consists of two one-way bearings (4) with opposite working directions, a synchronous pulley (8) and a belt (9). The one-way bearing (4) is in close contact with the lower end of the friction steel plate (3). The one-way bearing (4) and the synchronous pulley (8) are arranged coaxially. The synchronous pulley (8) and the belt (9) mesh to realize transmission. The one-way bearing (4) and the synchronous pulley (8) are connected to the front and rear panels of the outer shell (1) through a first optical axis (140). The first optical axis (140) is connected to the external pulley (24) through a flat key (20). The photoelectric detection and control system consists of a photoelectric switch (29), a second optical axis (141), and a light-shielding cloth (17). The photoelectric switch (29) is fixed to a trigger plate (22), which is connected to the rear panel of the outer casing (1) by bolts. The end pulley (28) is connected to the trigger plate (22) through the second optical axis (141), and the light-shielding cloth (17) is connected to the second optical axis (141) through a fixing ring (23). The external pulley (24) and the end pulley (28) are also connected by a belt (9) to achieve transmission. The lifting mechanism consists of a lifting block (10) and four equidistant supports (11). The four equidistant supports (11) are divided into two groups and are respectively set on both sides of the lifting block (10). The lifting block is connected to the handle (26) by a long bolt (25). A third optical axis (142) passes through the inside of the lifting block (10) and is hinged to the lower end of the equidistant supports (11). The equidistant supports (11) are connected to the front and rear panels of the outer shell (1) by a limiting part (12). The limiting part (12) slides in the groove of the outer shell (1).

2. The angle-friction damping device for optimizing acceleration control and with adjustable parameters according to claim 1, characterized in that: The angle friction damping device also includes a resistance control system, which consists of an adjustable resistor (27), and the electromagnet (2) is connected in series with the adjustable resistor (27).

3. The angle-flicker friction damping device for optimizing acceleration control and with adjustable parameters according to claim 2, characterized in that: Rubber strips are wrapped around the lower end of the friction steel plate (3) and the outer ring of the one-way bearing (4) to transmit the movement of the friction steel plate (3) to the one-way bearing (4). The one-way bearing (4) is set to allow it to move only in the direction of the equilibrium position, and the movement is further transmitted to the optical axis through the synchronous pulley (8) and belt (9) transmission system. A tensioning device (5) is also provided on the outside of the trigger plate (22) to tension the belt (9) between the end pulley (28) and the outer pulley (24).

4. The angle-friction damping device for optimizing acceleration control and with adjustable parameters according to claim 1, characterized in that: The diameter of the synchronous pulley (8) coaxially arranged with the one-way bearing (4) is four times the diameter of the synchronous pulley (8) coaxially arranged with the lifting block (10). The outer pulley (24) is coaxially arranged with the lifting block (10), and its diameter is four times the diameter of the end pulley (28).

5. The angle-flicker friction damping device for optimizing acceleration control and with adjustable parameters according to claim 1, characterized in that: The photoelectric switch (29) set on the trigger plate (22) can monitor the motion status in real time. When the light-shielding cloth (17) rotates to block the laser, the photoelectric switch (29) is triggered to control the power supply status of the electromagnet (2). This enables the working state of the one-way bearing (4) to be associated with the magnetic force of the electromagnet (2), thereby realizing the purpose of the angle in the bilinear hysteresis model.

6. The angle-friction damping device for optimizing acceleration control and with adjustable parameters according to claim 1, characterized in that: The lifting block (10) is connected to the handle (26) by a long bolt (25). The handle (26) can drive the lifting block (10) to move vertically relative to the bottom plate of the device housing (1). The third optical axis (142) passes through the lifting block (10) and is hinged to the lower end of the equidistant bracket (11). The vertical movement of the lifting block (10) is converted into the directional sliding of the equidistant bracket (11) in the preset groove. The upper end of the equidistant bracket (11) is connected to the limiting part (12). The limiting part (12) and the one-way bearing (4) are both connected to the first optical axis (140) by a flat key (20). The distance between the two one-way bearings (4) can be adjusted by shaking the handle (26).

7. The angle-friction damping device for optimizing acceleration control and with adjustable parameters according to claim 1, characterized in that: The one-way bearing (4) and the synchronous pulley (8) are connected by a flat key (20) in the keyway; the flat key (20) is used to limit the relative rotation between the one-way bearing (4) and the synchronous pulley (8); the two synchronous pulleys (8) are respectively set on both sides of the two one-way bearings (4), and drive the third optical axis (142) where the lifting block (10) is located to rotate through the belt (9), so that the two one-way bearings (4) can realize the hysteresis curves under different motion states respectively.

8. The angled friction damping device for optimizing acceleration control and with adjustable parameters according to claim 1, characterized in that: The length of the friction steel plate (3), the distance of the one-way bearing (4), and the displacement limit satisfy the following relationship: L=l 0 +2×d ; L This indicates the length of the friction steel plate (3). l 0 represents the distance between the two one-way bearings (4). d The failure displacement is indicated by the distance between the one-way bearings (4). The failure displacement can be adjusted by adjusting the distance between the bearings (4) to achieve the adjustment of the hysteresis model for different angle displacements.

9. The angled friction damping device for optimizing acceleration control and with adjustable parameters according to claim 1, characterized in that: The electromagnet (2) is connected in series with the adjustable resistor (27), and the damping force generated by the damping device is inversely proportional to the square of the resistance value of the adjustable resistor (27).

10. The angle-friction damping device for optimizing acceleration control and with adjustable parameters according to claim 1, characterized in that: The friction steel plate (3) has a threaded hole at its end that is connected to a linear drive shaft (19). The linear drive shaft (19) passes through a linear flange bearing (18) inside the housing (1) to control the linear motion of the friction steel plate (3).

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