Multi-dimensional tuning negative stiffness damper device

Abstract

The utility model discloses a multi-dimensional tuning negative stiffness damper device, which relates to the technical field of dampers, and is characterized in that a movable side plate can rotate around a base, a lever assembly on a damping assembly is connected to the side wall of the movable side plate, and a rotating disc body is connected to the movable side plate; when the damper device is installed on the top of a high-rise building such as a wind driven generator and a maritime lighthouse, and when the upper structure of the building and the damper incline due to a certain external force, the gravity center of the movable side plate and the direction of the force are kept on the same straight line due to the gravity effect; the movable side plate rotates in the direction perpendicular to the force along the annular groove in the upper surface, the damping assembly is triggered to conduct vibration reduction, the movable side plate conducts adaptive rotation on the force in any direction, and vibration reduction in multiple directions in the plane is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, in particular to a multi-dimensional tuning negative stiffness damper device. Background Art

[0002] Dampers play the role of reducing structural vibration and are usually installed at key nodes of building structures, bridges, vehicles, machinery, etc. The multi-dimensional tuned negative stiffness damper of the present invention is mainly installed on the top of tall buildings such as wind turbines and offshore lighthouses for passive vibration control of structures.

[0003] In the SPIS academic resource library, the journal number is: 70 (2023) 106341 and the journal name is: J BUILD ENG. The journal title is: Development of a novel tuned negative stiffness inerter damper for seismic induced structural vibration control. Figure 1 The damper device shown uses the principle of double levers to amplify the mass required for damping, so that structural vibration reduction does not rely on large mass. At the same time, the negative stiffness spring in the device can help the mass block swing in the opposite direction, achieving effective vibration reduction. However, the device can only achieve single-direction control of structural vibration and cannot achieve multi-directional vibration reduction. Utility Model Content

[0004] In order to overcome the problems that a damper device cannot achieve multi-directional vibration reduction and a lever amplification effect cannot be adjusted, the utility model provides a multi-dimensionally tuned negative stiffness damper device.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a multi-dimensional tuned negative stiffness damper device, comprising a damping assembly, a base and a movable side plate, the upper surface of the base being provided with an annular groove, the movable side plate being in abutment against the annular groove, the movable side plate moving circumferentially along the annular groove, the damping assembly comprising a rotating disk fixed to the side wall of the movable side plate, a lever assembly and a counterweight rod arranged on the rotating disk, one end of the lever assembly being connected to the movable side plate and the other end being in abutment against the counterweight rod.

[0006] As described above, the multi-dimensional tuned negative stiffness damper device has an adjustment portion on the side wall of the movable side plate, and the lever assembly includes a fixed bracket, a connecting rod and a rocker arm. The rocker arm is hinged to the fixed bracket, one end of the connecting rod is movably connected to the rocker arm, and the other end is connected to the adjustment portion. The connecting rod can be adjusted in height along the adjustment portion and the rocker arm.

[0007] As described above, the multi-dimensional tuned negative stiffness damper device, the rotating disk includes a base and an annular wall arranged around the base, and horizontal springs and viscous dampers connected to the annular wall are provided on both sides of the base in the length direction of the connecting rod. The horizontal springs and viscous dampers can make the base move back and forth relative to the annular wall along the length direction of the connecting rod.

[0008] In the multi-dimensional tuned negative stiffness damper device as described above, the lever assembly includes an auxiliary rod arranged on the top of the rocker, negative stiffness springs are provided at both ends of the auxiliary rod, and the other end of the negative stiffness spring is fixed to the rotating disk.

[0009] The multi-dimensional tuned negative stiffness damper device as described above includes a counterweight rod, a hemispherical groove is provided at the lower end of the rocker, a counterweight ball is provided at one end of the counterweight rod, and a hemispherical portion is provided at the other end, the counterweight rod is provided with a support column hinged on the rotating disk, the hemispherical portion abuts against the hemispherical groove, and the hemispherical portion can rotate arbitrarily relative to the hemispherical groove.

[0010] As described above, the multi-dimensional tuned negative stiffness damper device has an adjustment groove, the rotating disk is provided with an adjustment groove, the counterweight rod is provided with a support column that can move axially along the counterweight rod, and the lower end of the support column is provided with a support spring that can be movably adjusted along the adjustment groove.

[0011] In the multi-dimensional tuned negative stiffness damper device as described above, a ball base is provided at the bottom of the base, and the ball base is provided with balls. The ball base is used to enable the ball base to move horizontally relative to the base plane.

[0012] As described above, the multi-dimensional tuned negative stiffness damper device, the adjustment part includes a movable slot and a fixed slot, the rocker is provided with a long slot, one end of the connecting rod can be adjusted and fixed in the long slot, and the other end penetrates the movable slot and is provided with a bending plate, and the bending plate is fixed by a fixing member penetrating the fixed slot.

[0013] Compared with the existing technology, the beneficial effects of this technical solution are:

[0014] After adopting the structure of the present invention, since the movable side panel can rotate around the base, the lever assembly on the damping assembly is connected to the side wall of the movable side panel, and the rotating disk is connected to the movable side panel. When the damper device is installed on the top of a tall building such as a wind turbine or an offshore lighthouse, when a certain external force causes the upper structure of the building and the damper to tilt, due to the action of gravity, the center of gravity of the movable side panel should remain in the same straight line as the direction of the force, so the movable side panel will turn along the circular groove on the upper surface to the direction perpendicular to the force, and trigger the damping assembly to reduce vibration. The movable side panel will adaptively rotate after recognizing the force in any direction, thereby realizing vibration reduction in multiple directions within the plane.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 It is a structural diagram of the prior art;

[0018] Figure 2 It is a three-dimensional diagram of the utility model;

[0019] Figure 3 yes Figure 2 Partial schematic diagram at point A;

[0020] Figure 4 It is a rear view of the utility model;

[0021] Figure 5 It is a top view of the utility model;

[0022] Figure 6 This is a schematic diagram of the ball base structure of the utility model; DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] like Figures 2 to 6A multi-dimensional tuned negative stiffness damper device is shown, comprising a damping assembly 1, a base 2, and a movable side plate 3. The upper surface of the base 2 is provided with an annular groove 21, the movable side plate 3 abuts against the annular groove 21, and the movable side plate 3 moves circumferentially along the annular groove 21. The damping assembly 1 comprises a rotating disk 11 fixed to the side wall of the movable side plate 3, and a lever assembly 12 and a counterweight rod 13 provided on the rotating disk 11. One end of the lever assembly 12 is connected to the movable side plate 3, and the other end abuts against the counterweight rod 13. After adopting the structure of the present utility model, since the movable side plate can rotate around the base, the lever assembly on the damping assembly is connected to the side wall of the movable side plate, and the rotating disk is connected to the movable side plate, preferably, in order to reduce the influence of the outside world on the device, the damper device can be placed in a sealed container, and then the device can be installed on the building, thereby reducing the influence of the external environment on the damper device. When the damper device is installed on the top of a tall building such as a wind turbine or an offshore lighthouse, when an external force causes the upper structure of the building and the damper to tilt, due to the action of gravity, the center of gravity of the movable side panel 3 should remain in the same straight line with the direction of the force, so the movable side panel 3 will turn along the circular groove 21 on the upper surface in a direction perpendicular to the force and trigger the damping assembly 1 to reduce vibration. The movable side panel 3 will adaptively rotate after recognizing the force in any direction, thereby achieving vibration reduction in multiple directions within the plane.

[0025] like Figure 1 The multi-dimensional tuned negative stiffness damper device shown has an annular groove 21 on the upper surface of the base 2 for accommodating the movable side plate 3. The movable side plate 3 primarily serves as a counterweight for the damper device and serves as the outer shell of the damper device. The movable side plate 3 moves in a circular motion along the groove 21, and two bolt holes are provided at the lower portion of the movable side plate 3 for connecting the annular wall 113. In other words, the annular wall 113 and the movable side plate 3 are fixed, and the rotation of the movable side plate 3 drives the rotation of the annular wall 113. Four ball bearing bases 5 are attached between the upper disc assembly 11 and the base 2. Each ball bearing base 5 is provided with three balls 51. Their function is to ensure that the upper disc assembly 11 can freely move horizontally and rotate freely on the base 2. The upper surface circular groove 21 is covered with small steel balls, whose main function is to reduce the friction generated by the sliding of the lower end of the movable side panel 3 in the upper surface circular groove 21 of the base 2, and to increase the lubricating oil to assist the movement according to actual needs, so that the inertia force generated by the rotation of the movable side panel 3 is much greater than the friction force generated by the coordinated movement of the lower end of the movable side panel 3 in the upper surface circular groove 21, allowing the movable side panel 3 to rotate lightly on the upper surface circular groove 21.

[0026] Furthermore, the side wall of the movable side panel 3 is provided with an adjustment portion 31. The lever assembly 12 includes a fixed bracket 121, a connecting rod 122, and a rocker 123. The rocker 123 is hinged to the fixed bracket 121. One end of the connecting rod 122 is movably connected to the rocker 123, and the other end is connected to the adjustment portion 31. The connecting rod 122 can be adjusted in height along the adjustment portion 31 and the rocker 123. The adjustment portion 31 includes a movable slot 311 and a fixed slot 312. The rocker 123 is provided with an elongated slot 1232. One end of the connecting rod 122 is adjustably fixed in the elongated slot 1232, and the other end penetrates the movable slot 311 and is provided with a bent plate. The bent plate is fixed by a fixing member penetrating the fixed slot 312. The upper portion of the movable side panel 3 is provided with a movable slot 311 and a fixed slot 312. The fixed slot 312 is used to fix the movable side panel 3 and the bent plate on the connecting rod 122. The movable slot 311 is used to allow the connecting rod 122 to move up and down, thereby increasing or decreasing the distance between the connecting rod 122 and the bottom of the rocker 123, thereby increasing or decreasing the lever amplification factor and achieving the first level of mass control. Since the upper portion of the movable side panel 3 is connected to the connecting rod 122 and the lower portion is connected to the rotating disk 11, the movable side panel 3 and the damping assembly 1 can rotate together. Assuming that when the main structure is subjected to a leftward force, the movable side panel 3 will rotate to the left half due to the action of gravity, that is, the movable side panel is perpendicular to the direction of the force and the center of gravity of the movable side panel 3 is on the same line as the direction of the force. Since the movable side panel 3 is fixed to the lever assembly 12, the lever assembly 12 will rotate together. When the upper end of the rocker 123 is pushed to the right, the lower end of the rocker 123 will swing to the left. Due to the principle of leverage, the fulcrum positions on the lever are different, and the forces on both sides of the lever are different, thereby achieving a first-level amplification of mass.

[0027] As a specific implementation rather than a limitation, in order to achieve secondary amplification of mass, a hemispherical groove 1231 is provided at the lower end of the rocker 123, a counterweight ball 131 is provided at one end of the counterweight rod 13, and a hemispherical portion 132 is provided at the other end, and the counterweight rod 13 is provided with a support column 133 hinged on the rotating disk body 11, and the hemispherical portion 132 abuts against the hemispherical groove 1231, and the hemispherical portion 132 can rotate arbitrarily relative to the hemispherical groove 1231, and the rotating disk body 11 is provided with an adjustment groove 111, and the support column 133 can move axially along the counterweight rod 13, and a support spring 1331 is provided at the lower end of the support column 133, and the support spring 1331 can be movably adjusted along the adjustment groove 111. When rocker 123 swings leftward, the leftward swing of the lower end of rocker 123 causes hemispherical portion 132 to swing relatively leftward, as hemispherical groove 1231 interlocks with the hemisphere of hemispherical portion 132. Counterweight rod 4 passes through support column 133, forming a lever with support column 133. This causes counterweight ball 131 to swing rightward relative to the rocker, tending to reset rocker 123. Support column 133 is movable within adjustment groove 11, acting as the fulcrum of counterweight rod 133. Adjusting the fulcrum position allows for varying degrees of mass scaling. Support spring 1331 at the bottom of support column 133 is movable relative to support column 133, assisting in the up and down movement of support column 133. As rocker 123 swings left and right, a vertical displacement difference is generated, which support spring 1331 compensates for. Optionally, the hemisphere at the front end of the hemisphere portion 132 can be made of magnets or magnetized, and the rocker 123 is made of iron, and the magnetic force is used to achieve a close fit between the two.

[0028] As a specific embodiment, not a limitation, the rotating disk 11 includes a base 112 and an annular wall 113 disposed around the base 112. A horizontal spring 114 and a viscous damper 115 connected to the annular wall 113 are disposed on both sides of the base 112 along the length of the connecting rod 122. The horizontal spring 114 and the viscous damper 115 enable the base 112 to reciprocate relative to the annular wall 113 along the length of the connecting rod 122. The horizontal spring 114 and the viscous damper 115 are symmetrically arranged on both sides of the base 112 to absorb energy and enable the base 112 to move relative to the annular wall 113.

[0029] Furthermore, lever assembly 12 includes an auxiliary rod 124 mounted on top of rocker 123. Negative springs 125 are mounted at both ends of auxiliary rod 124, the other end of which is fixed to rotating disc 11. Negative spring 125 is a pre-tensioned spring. As rocker 123 swings, negative spring 125 performs an incomplete circular motion with its own length as the radius and the midpoint of auxiliary rod 124 as the center. Negative spring 125 exerts the greatest tension in a vertical position. When the device swings left or right, negative spring 125 releases its maximum tension, assisting rocker 123 and counterweight ball 131 in swinging left or right. Therefore, negative spring 125 assists the device in movement and thus reduces vibration. Even in the event of low-frequency vibrations, the device can keenly detect and reduce vibrations.

[0030] The working principle of this embodiment is as follows: the damper device is first installed in a closed device and then installed on the top of a tall building. When the tall building is subjected to force in any direction, such as when the main structure of the building is subjected to a horizontal force to the left, the damper device will tilt to the left along with the main structure, and the movable side plate 3 will slide to the left half through the circular groove 21 on the upper surface of the bottom disc 2, and the movable side plate 3 will rotate with the damping assembly 1. As the entire device tilts leftward, gravity forces base 112 to slide leftward, compressing horizontal spring 114 and viscous damper 115 closer to movable side plate 3. Horizontal spring 114 further away from movable side plate 3 stretches. As base 112 moves leftward, connecting rod 122, fixed to the movable side plate, becomes immobile relative to movable side plate 3, while its length remains unchanged. This effectively pushes the upper end of rocker arm 123 rightward, causing the lower end of rocker arm 123 to move leftward due to the lever mechanism. Furthermore, due to the interaction between hemispherical portion 132 and rocker arm 123, counterweight ball 131 swings rightward relative to the lower end of rocker arm 123, tending to return rocker arm 123 to its vertical position. Therefore, when the main structure swings leftward, counterweight ball 131 within the device swings rightward, tending to return rocker arm 123 to its vertical position, effectively reducing vibration frequency and enhancing structural stability. The forces in other directions are also damped and reduced according to the above principle to increase the stability of the structure.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A multi-dimensional tuned negative stiffness damper device, characterized in that: The invention comprises a damping assembly (1), a base (2) and a movable side plate (3); the upper surface of the base (2) is provided with an annular groove (21); the movable side plate (3) abuts against the annular groove (21); the movable side plate (3) moves circumferentially along the annular groove (21); the damping assembly (1) comprises a rotating disk (11) fixed to the side wall of the movable side plate (3); a lever assembly (12) and a counterweight rod (13) arranged on the rotating disk (11); one end of the lever assembly (12) is connected to the movable side plate (3); and the other end abuts against the counterweight rod (13).

2. The multi-dimensional tuned negative stiffness damper device according to claim 1, characterized in that: The side wall of the movable side panel (3) is provided with an adjusting portion (31), and the lever assembly (12) includes a fixed bracket (121), a connecting rod (122) and a rocker (123), wherein the rocker (123) is hinged to the fixed bracket (121), one end of the connecting rod (122) is movably connected to the rocker (123), and the other end is connected to the adjusting portion (31), and the connecting rod (122) can be adjusted in height along the adjusting portion (31) and the rocker (123).

3. The multi-dimensional tuned negative stiffness damper device according to claim 2, characterized in that: The rotating disk (11) includes a base (112) and an annular wall (113) arranged around the base (112). Horizontal springs (114) and viscous dampers (115) connected to the annular wall (113) are provided on both sides of the base (112) in the length direction of the connecting rod (122). The horizontal springs (114) and the viscous dampers (115) can enable the base (112) to move back and forth relative to the annular wall (113) along the length direction of the connecting rod (122).

4. The multi-dimensional tuned negative stiffness damper device according to claim 2, characterized in that: The lever assembly (12) includes an auxiliary rod (124) disposed on the top of the rocker (123), and negative stiffness springs (125) are provided at both ends of the auxiliary rod (124). The other end of the negative stiffness spring (125) is fixed to the rotating disk (11).

5. The multi-dimensional tuned negative stiffness damper device according to claim 4, characterized in that: A hemispherical groove (1231) is provided at the lower end of the rocker (123), a counterweight ball (131) is provided at one end of the counterweight rod (13), and a hemispherical portion (132) is provided at the other end, the counterweight rod (13) is provided with a support column (133) hinged to the rotating disk (11), the hemispherical portion (132) abuts against the hemispherical groove (1231), and the hemispherical portion (132) can rotate arbitrarily relative to the hemispherical groove (1231).

6. The multi-dimensional tuned negative stiffness damper device according to claim 5, characterized in that: The rotating disc (11) is provided with an adjustment groove (111), the support column (133) can move axially along the counterweight rod (13), and a support spring (1331) is provided at the lower end of the support column (133), and the support spring (1331) can be movably adjusted along the adjustment groove (111).

7. The multi-dimensional tuned negative stiffness damper device according to claim 3, characterized in that: A ball base (5) is provided at the bottom of the base (112), and the ball base (5) is provided with a ball (51). The ball base (5) is used to enable the ball base (5) to move horizontally relative to the plane of the base (2).

8. The multi-dimensional tuned negative stiffness damper device according to claim 2, characterized in that: The adjusting portion (31) comprises a movable slot (311) and a fixed slot (312); the rocker (123) is provided with a long slot (1232); one end of the connecting rod (122) is adjustable and fixed in the long slot (1232); the other end penetrates the movable slot (311) and is provided with a bent plate; the bent plate is fixed by a fixing member penetrating the fixed slot (312).

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