A pendulum-type tuned mass vibration damper

Abstract

The present invention provides a pendulum-type tuned mass damper, comprising a mass unit, a swing arm unit and an energy dissipation unit, wherein the mass unit comprises an upper mass block and a lower mass block, wherein the upper mass block is swingably connected to a controlled structure through the swing arm unit, and the lower mass block is horizontally movably supported on the controlled structure through a horizontal guide assembly; the energy dissipation unit comprises a linear damping assembly and a nonlinear damping assembly, wherein the linear damping assembly is arranged at the bottom of the lower mass block, and the nonlinear damping assembly comprises linear dampers symmetrically arranged on both sides of the mass unit, and the upper mass block is connected to the lower mass block through the linear dampers. The present invention has the advantages of reducing the occupied space and having excellent vibration reduction effect under the condition of the same mass unit vibration frequency and effective mass.

Description

Technical Field

[0001] The invention relates to the field of damping and vibration reduction, and in particular to a pendulum-type tuned mass vibration absorber. Background Art

[0002] Tuned mass dampers (TMDs) have been widely used in vibration suppression and attenuation of large structures such as bridges. They are mainly composed of mass units, stiffness units and damping units. They achieve the purpose of vibration reduction by tuning their own frequency to a frequency close to the structural vibration frequency. Among them, the pendulum tuned mass damper is a common type of tuned mass damper. Its stiffness unit (swing arm unit) has a long swing length and a large size. When the pendulum tuned mass damper is used in vibration reduction occasions with limited space such as wind turbines (wind turbines have many internal facilities and compact space) and high-rise buildings, the effective stroke will be limited, thus failing to exert an excellent vibration reduction effect. At the same time, the existing tuned mass damper usually uses linear damping for energy dissipation. It is difficult to simultaneously meet the energy dissipation and vibration reduction effects under daily and extreme working conditions. There is a risk of lateral collision between the mass unit and the controlled structure under extreme working conditions. The pendulum tuned mass damper has poor safety and stability in extreme environments. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a pendulum tuned mass damper which reduces the occupied space and has excellent vibration reduction effect under the condition of the same mass unit vibration frequency and effective mass.

[0004] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0005] A pendulum-type tuned mass damper comprises a mass unit, a swing arm unit and an energy dissipation unit, wherein the mass unit comprises an upper mass block and a lower mass block, wherein the upper mass block is swingably connected to a controlled structure via the swing arm unit, and the lower mass block is horizontally movably supported on the controlled structure via a horizontal guide assembly; the energy dissipation unit comprises a linear damping assembly and a nonlinear damping assembly, wherein the linear damping assembly is arranged at the bottom of the lower mass block, and the nonlinear damping assembly comprises linear dampers symmetrically arranged on both sides of the mass unit, and the upper mass block is connected to the lower mass block via the linear dampers.

[0006] As a further improvement of the above technical solution:

[0007] The pendulum tuned mass damper also includes a vertical guide assembly, which includes an axial guide sleeve and a guide rod that are mutually sleeved, the axial guide sleeve is vertically installed on the upper mass block, the guide rod is fixed to the lower mass block, the top end of the guide rod passes through the axial guide sleeve, and the top end of the guide rod is provided with an upper limit portion to prevent the upper mass block and the lower mass block from detaching from each other.

[0008] The pendulum-type tuned mass damper also includes a limit spring for preventing the mass unit from over-limit collision. The guide rod is provided with a lower limit portion that can move axially along the guide rod. The limit spring is installed between the upper limit portion and the lower limit portion. An over-limit collision space is reserved between the axial guide sleeve and the lower limit portion so that they can contact each other when the upper mass block exceeds the limit displacement.

[0009] The pendulum tuned mass damper also includes an upper mass block mounting frame, the upper mass block is placed on the upper part of the upper mass block mounting frame, a guide installation space is provided at the lower part of the upper mass block mounting frame, the axial guide sleeve is located in the guide installation space and is installed on the upper mass block mounting frame through a horizontal mounting frame.

[0010] The upper mass block mounting frame includes an upper frame body for placing the upper mass block, a lower frame body for setting a guide installation space, and a horizontal connecting plate connecting the upper frame body and the lower frame body. The swing arm unit includes a swing arm and a fixed connecting piece. The horizontal connecting plate is provided with a hinge hole with an arc-shaped inner side wall. The swing arm passes through the hinge hole and is fixed to the lower frame body through the fixed connecting piece.

[0011] A position-limiting buffer portion is provided at the center position of the lower side of the lower mass block, and the position-limiting buffer portion cooperates with the horizontal guide assembly in a position-limiting manner when the lower mass block moves to a preset limit position.

[0012] The horizontal guide assembly includes a double rail assembly or a plurality of bull's eye bearings;

[0013] The double rail assembly comprises an upper rail component and a lower rail component, the lower rail of the lower rail component is four lower rails arranged in a cross shape, the lower slider of the lower rail component is vertically cross-connected with the upper slider of the upper rail component, the lower mass block is installed on the upper rail of the upper rail component through a lower mounting frame; the limit buffer portion is arranged at the center of the lower rail arranged in a cross shape; the linear damping assembly is arranged at the four corners of the lower mounting frame;

[0014] When the horizontal guide assembly includes a plurality of bull's eye bearings, the linear damping assembly and the bull's eye bearings are staggered and arranged on the lower mounting frame.

[0015] The mass unit is connected to the controlled structure through an installation force transmission frame, and the installation force transmission frame includes a mounting frame sleeved on the outside of the mass unit, a horizontal mounting plate arranged at the bottom end of the mounting frame, and a force transmission frame connected between the mounting frame and the controlled structure; the swing arm unit is connected to the controlled structure through the mounting frame and the force transmission frame in turn; the horizontal guide assembly and the linear damping assembly are installed between the lower mass block and the horizontal mounting plate.

[0016] The force transmission mounting frame also includes a height adjustment component for adjusting the height of the swing arm unit, and the height adjustment component includes a lifting adjustment frame, a lifting adjustment rope and a rope fixing frame, the swing arm unit is hinged to the lifting adjustment frame, the lifting adjustment frame can be vertically slidably mounted on the mounting frame, the rope fixing frame is arranged above the lifting adjustment frame, the bottom end of the lifting adjustment rope is fixedly connected to the lifting adjustment frame, and the top end of the lifting adjustment rope is connected to the rope fixing frame through a rope body clamping limiter so as to be adjustable in height.

[0017] The linear damping component is an eddy current damping component, which includes an energy-dissipating magnetic steel and a conductor plate. The energy-dissipating magnetic steel and the conductor plate are arranged relatively between the lower mass block and the controlled structure.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] (1) The present invention is the first to separate the mass unit into an upper mass block and a lower mass block. After the separation, the swing length of the swing arm is proportional to the proportion of the upper mass block in the total mass of the mass unit. When the mass unit requires a specific vibration frequency, the swing length of the swing arm can be shorter than the swing length of the existing single mass block by reducing the mass proportion of the upper mass block. Therefore, under the same mass unit vibration frequency and the same effective mass, the present invention can effectively reduce the swing length of the swing arm unit by separating the upper mass block and the lower mass block and adjusting the proportion of the upper mass block and the lower mass block, greatly reducing the vertical space occupied by the shock absorber, and can be applied to the vibration reduction of wind-induced vibration (with the characteristics of mainly horizontal vibration, low vibration frequency and large vibration amplitude) and space-constrained structures such as wind turbines.

[0020] (2) Based on the structure of the mass block being separately set, the present invention effectively realizes the excellent vibration reduction and energy dissipation effect of the shock absorber under normal and extreme working conditions through the combination of the linear damping component and the nonlinear damping component. Specifically, the damping size of the nonlinear damping component is nonlinearly related to the horizontal displacement of the mass block. When the shock absorber is in daily operation, the horizontal displacement of the mass unit is small. At this time, the damping provided by the nonlinear damping component can be ignored. The excellent vibration reduction effect can be achieved mainly by providing damping force through the linear damping component. When the shock absorber is in extreme working conditions and the amplitude exceeds the preset stroke (such as earthquakes, extreme winds or emergency stops that may cause impact), the horizontal displacement of the mass unit is large, causing the damping of the nonlinear damping component to increase nonlinearly. At this time, the nonlinear damping component begins to work. The combination of the linear damping component and the nonlinear damping component provides damping, which effectively reduces the vibration amplitude of the mass block under extreme working conditions and reduces the probability of lateral collision between the mass unit and the controlled structure.

[0021] It can be seen that the shock absorber obtains excellent damping and vibration reduction effects through the linear damping component within the design stroke; when the shock absorber is in extreme working conditions and the amplitude exceeds the preset stroke, the nonlinear damping component and the linear damping component work together to obtain excellent damping and vibration reduction effects, thereby reducing the amplitude of the tuned mass shock absorber under extreme working conditions such as earthquakes, extreme winds or emergency stops, and effectively preventing the occurrence of over-limit collision of the shock absorber.

[0022] (3) The nonlinear damping component includes linear dampers symmetrically arranged on both sides of the mass unit. The linear dampers decouple the vertical motion of the upper mass block and the lower mass block, that is, release the vertical relative motion constraint of the upper mass block and the lower mass block. At this time, the lower mass block will not move vertically synchronously with the swing of the upper mass block, and the lower mass block will still move in the original horizontal plane. At this time, the gap between the lower mass block and the controlled structure remains unchanged. The lower mass block can be supported on the controlled structure freely in the plane through the horizontal guide component, which makes the gap of the linear damping component arranged at the gap remain unchanged, which can maintain the linear damping vibration reduction effect of the linear damping component and ensure the reliable operation of the vibration reduction function of the linear damping component.

[0023] After the vertical motion is decoupled, the restoring force (elastic force) of the damper will be provided solely by the gravity of the upper mass block, while the gravity of the lower mass block is completely borne by the horizontal guide assembly, which does not provide a restoring force. At the same time, the linear damper couples the horizontal motion of the upper mass block with that of the lower mass block, that is, the mass block and the lower mass block move together in the horizontal direction, and the horizontal inertial force of the damper (the effective mass of the mass unit) is the sum of the upper mass block and the lower mass block, and the effective mass of the mass unit is the same as the effective mass of the traditional single mass block. In other words, the upper mass block and the lower mass block move relative to each other vertically without affecting each other, and move together in the horizontal direction, which can achieve the purpose of effectively shortening the swing length of the swing arm of the mass unit at the same frequency and the same effective mass. It is a necessary setting structure to shorten the swing length of the shock absorber swing arm, and it is also the basic principle of the separated mass pendulum damper.

[0024] (4) In extreme working conditions such as when the swing arm unit breaks, the horizontal guide assembly can support the overall structure of the shock absorber, and the linear damper can provide cushioning during the falling process of the upper mass block, allowing the upper mass block to fall smoothly on the lower mass block, thereby ensuring the safety of the shock absorber in extreme environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0026] Figure 1 It is a schematic diagram of the structure of the pendulum-type tuned mass damper of the present invention in a specific application;

[0027] Figure 2 yes Figure 1 The main view of

[0028] Figure 3 yes Figure 2 Left view of;

[0029] Figure 4 It is a three-dimensional structural diagram of a pendulum tuned mass damper;

[0030] Figure 5 yes Figure 4 The main view of

[0031] Figure 6 yes Figure 5 AA cross-sectional view;

[0032] Figure 7 yes Figure 5 A three-dimensional cross-sectional view at AA;

[0033] Figure 8 It is the schematic diagram of the pendulum tuned mass damper;

[0034] Fig. 9 It is a schematic diagram of the three-dimensional structure of the horizontal guide component.

[0035] The symbols in the figure represent:

[0036] 1. Mass unit; 11. Upper mass block; 12. Lower mass block; 121. Lower mounting frame; 2. Swing arm unit; 21. Swing arm; 22. Fixed connector; 3. Energy dissipation unit; 31. Linear damping assembly; 311. Energy dissipation magnet; 312. Conductor plate; 32. Nonlinear damping assembly; 321. Linear damper; 4. Controlled structure; 5. Horizontal guide assembly; 51. Double guide rail assembly; 511. Lower guide rail; 512. Lower slider; 513. Upper slider; 514. Upper guide rail; 52. Bull's eye bearing; 6. Vertical guide assembly; 61. Axial guide sleeve; 62. Guide rod; 621. Upper limit part; 622, lower limit part; 63, over-limit collision space; 7, limit assembly; 71, limit spring; 72, limit buffer; 8, upper mass block mounting frame; 81, guide mounting space; 82, horizontal mounting frame; 83, upper frame; 84, lower frame; 85, horizontal connecting plate; 9, force transmission frame installation; 91, mounting frame; 92, horizontal mounting plate; 93, force transmission frame; 931, mounting ring; 932, force transmission mounting rod; 10, height adjustment assembly; 101, lifting adjustment frame; 102, lifting adjustment rope; 103, rope body fixing frame; 104, rope body clamping limiter. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0038] Figures 1 to 8The embodiment of the pendulum tuned mass damper of the present invention is shown. The pendulum tuned mass damper comprises a mass unit 1, a swing arm unit 2 and an energy dissipation unit 3. The mass unit 1 comprises an upper mass block 11 and a lower mass block 12. The upper mass block 11 is swingably connected to the controlled structure 4 through the swing arm unit 2. The lower mass block 12 is horizontally movably supported on the controlled structure 4 through a horizontal guide assembly 5. The energy dissipation unit 3 comprises a linear damping assembly 31 and a nonlinear damping assembly 32. The linear damping assembly 31 is arranged at the bottom of the lower mass block 12. The nonlinear damping assembly 32 comprises linear dampers 321 symmetrically arranged on both sides of the mass unit 1. The upper mass block 11 and the lower mass block 12 are connected through the linear dampers 321. The structure is simple and compact, and occupies little space.

[0039] The present invention is the first to split the mass unit 1 into an upper mass block 11 and a lower mass block 12. After the split setting, the swing length of the swing arm 21 is directly proportional to the proportion of the upper mass block 11 in the total mass of the mass unit 1. When the mass unit 1 requires a specific vibration frequency, the swing length of the swing arm 21 can be shorter than the swing length of the swing arm 21 of the existing traditional single mass block by reducing the mass proportion of the upper mass block 11. Therefore, under the condition of the same vibration frequency of the mass unit 1 and the same effective mass, the present invention can effectively reduce the swing length of the swing arm 21 of the swing arm unit 2 by splitting the upper mass block 11 and the lower mass block 12 and adjusting the mass proportion of the upper mass block 11 and the lower mass block 12, thereby greatly reducing the vertical space occupied by the shock absorber, and can be applied to the vibration reduction of space-constrained structures such as wind turbines that are mainly wind-induced vibrations (with the characteristics of mainly horizontal vibrations, low vibration frequencies and large vibration amplitudes). Specifically, after the upper mass block 11 and the lower mass block 12 are split, the vibration frequency of the mass unit 1 、Swing arm 21 swing length The proportional relationship with the mass unit 1 is:

[0040] ,

[0041] In the formula, is the vibration frequency of mass unit 1, is the proportion of the upper mass block 11 in the total mass of the mass unit 1, is the acceleration due to gravity, For the swing arm 21 swing length.

[0042] When the mass unit 1 requires a specific vibration frequency, the smaller the proportion of the upper mass block 11, the shorter the required swing length of the swing arm 21. It can be seen that by setting the upper mass block 11 and the lower mass block 12, adjusting the proportion of the upper mass block 11 and the lower mass block 12 can shorten the swing length of the swing arm 21, reduce the setting space, and make it applicable to vibration reduction in space-constrained applications.

[0043] Based on the structure of the mass block being set separately, the present invention effectively realizes the excellent vibration reduction and energy dissipation effect of the shock absorber under normal and extreme working conditions through the combination of the linear damping component 31 and the nonlinear damping component 32. Specifically, the damping coefficient of the tuned mass shock absorber is C , linear damping component 31 damping coefficient and the nonlinear damping component 32 damping coefficient The relationship is:

[0044] ,

[0045] In the formula, C is the damping coefficient of the tuned mass damper ， is the damping coefficient of the linear damping component 31, is the intrinsic damping coefficient of the nonlinear damping component, is the damping coefficient of the nonlinear damping component 32 applied to the pendulum tuned mass damper, wherein, is the horizontal displacement of mass unit 1, is the swing length of the swing arm 21. and Determined according to the characteristics of the damping component itself.

[0046] It can be seen from the above formula that the damping magnitude of the nonlinear damping component 32 is nonlinearly related to the horizontal displacement of the mass unit 1. When the horizontal displacement of the mass unit 1 is 0, the nonlinear damping is 0; when the horizontal displacement of the mass unit 1 increases, the nonlinear damping also gradually increases. The damping coefficient of the linear damping component 31 remains unchanged when the mass unit 1 moves, and the damping of the linear damping component 31 is proportional to the displacement speed.

[0047] When the shock absorber is in normal operation, the mass unit 1 is displaced horizontally. u The value is very small. At this time, The value is very small, so that the damping of the nonlinear damping component 32 can be ignored, and the damping is mainly provided by the linear damping component 31, so as to achieve an excellent vibration reduction effect.

[0048] The greater the vibration of the controlled structure 4, the greater the amplitude of the shock absorber. However, the amplitude of the shock absorber is limited by the design stroke. When the amplitude of the controlled structure 4 exceeds a certain value, the amplitude of the shock absorber will exceed the design stroke. When the shock absorber is in extreme working conditions and the amplitude exceeds the preset stroke, the preset amplitude stroke of the shock absorber is the maximum amplitude of the shock absorber set according to the vibration reduction requirements and the size of the controlled structure 4. At this time, the horizontal displacement of the mass unit 1 u big, The value is large, and the damping of the nonlinear damping component 32 increases nonlinearly. At this time, the nonlinear damping component 32 begins to provide damping force. The damping energy provided by the combination of the linear damping component 31 and the nonlinear damping component 32 effectively reduces the vibration amplitude of the mass block under extreme working conditions, and reduces the probability of lateral collision between the mass unit 1 and the controlled structure 4.

[0049] It can be seen that the shock absorber obtains excellent damping and vibration reduction effects through the linear damping component 31 during daily operating conditions; when the shock absorber is in extreme conditions and the amplitude exceeds the preset stroke, the nonlinear damping component 32 and the linear damping component 31 work together to obtain excellent damping and vibration reduction effects, thereby reducing the amplitude of the tuned mass shock absorber under extreme conditions such as earthquakes, extreme winds or emergency stops, and effectively preventing the occurrence of over-limit collision of the shock absorber.

[0050] The nonlinear damping component 32 includes linear dampers 321 symmetrically arranged on both sides of the mass unit 1. The linear damper 321 decouples the vertical movement of the upper mass block 11 and the lower mass block 12, that is, releases the vertical relative movement constraint of the upper mass block 11 and the lower mass block 12. At this time, the lower mass block 12 will not move vertically synchronously with the swing of the upper mass block 11, and the lower mass block 12 still maintains movement in the original horizontal plane. At this time, the gap between the lower mass block 12 and the controlled structure 4 remains unchanged, and the lower mass block 12 can be supported on the controlled structure 4 freely in the plane through the horizontal guide component 5, which makes the gap of the linear damping component 31 set at the gap remain unchanged, and the linear damping vibration reduction effect of the linear damping component 31 can be maintained, ensuring the reliable operation of the vibration reduction function of the linear damping component 31.

[0051] After the vertical motion is decoupled, the restoring force (elastic force) of the damper will be provided solely by the gravity of the upper mass block 11, while the gravity of the lower mass block 12 is completely borne by the horizontal guide assembly 5, which does not provide a restoring force. At the same time, the linear damper 321 couples the horizontal motion of the upper mass block 11 with that of the lower mass block 12, that is, the mass block 11 and the lower mass block 12 move together in the horizontal direction, and the horizontal inertial force of the damper (the effective mass of the mass unit 1) is the sum of the upper mass block 11 and the lower mass block 12, so that the effective mass of the mass unit 1 remains unchanged from the effective mass of the traditional single mass block. In other words, the upper mass block 11 and the lower mass block 12 move relative to each other vertically without affecting each other, and move together in the horizontal direction, so that the purpose of effectively shortening the swing length of the swing arm 21 of the mass unit 1 at the same frequency and the same effective mass can be achieved. It is a necessary setting structure to shorten the swing length of the shock absorber swing arm 21, and it is also the basic principle of the separated mass pendulum damper.

[0052] Finally, when the swing arm unit 2 breaks or other working conditions occur, the horizontal guide assembly 5 can support the overall structure of the shock absorber, and the linear damper 321 can provide a buffering effect during the falling process of the upper mass block 11, so that the upper mass block 11 can fall smoothly on the lower mass block 12, and the combined force of gravity is supported by the horizontal guide assembly 5 and transmitted to the bottom structure of the shock absorber, ensuring the safety of the shock absorber in unexpected extreme environments.

[0053] Furthermore, if Figure 6 and Figure 7 As shown, the pendulum tuned mass damper also includes a vertical guide assembly 6, which includes an axial guide sleeve 61 and a guide rod 62. The axial guide sleeve 61 is vertically mounted on the upper mass block 11, and the guide rod 62 is fixed to the lower mass block 12. The axial guide sleeve 61 and the guide rod 62 are mutually sleeved, and the top of the guide rod 62 passes through the axial guide sleeve 61. The setting of the vertical guide assembly 6 further ensures that the upper mass block 11 and the lower mass block 12 can move relative to each other vertically, and the upper mass block 11 and the lower mass block 12 can move together in the horizontal direction, thereby further ensuring the effective energy consumption and reliable operation of the shock absorber when the mass blocks are set separately. At the same time, an upper limit portion 621 is fixedly provided at the top of the guide rod 62. The setting of the upper limit portion 621 can effectively prevent the upper mass block 11 from being separated from the lower mass block 12 when it moves to the extreme position, thereby improving the safety of the shock absorber.

[0054] Furthermore, the pendulum tuned mass damper also includes a limit spring 71. The guide rod 62 is provided with a lower limit portion 622 which can move axially along the guide rod 62, and the lower limit portion 622 is arranged below the upper limit portion 621. The limit spring 71 is installed between the upper limit portion 621 and the lower limit portion 622, and the bottom end of the limit spring 71 is connected to the lower limit portion 622. An over-limit collision space 63 is left between the axial guide sleeve 61 and the lower limit portion 622. The size of the over-limit collision space 63 is set according to the proportional relationship between the horizontal displacement of the mass unit 1 and the corresponding vertical displacement, and the maximum preset horizontal displacement of the mass unit 1. Specifically, according to the proportional relationship between the horizontal displacement of the mass unit 1 and the corresponding vertical displacement, the preset vertical displacement of the mass unit 1 at the maximum preset horizontal displacement is obtained, so that the required height of the over-limit collision space 63 is set according to the preset vertical displacement.

[0055] When the mass unit 1 moves away from the center position in any direction in the horizontal plane, the upper mass block 11 moves upward. When the horizontal movement displacement of the upper mass block 11 is at the maximum preset horizontal displacement, the axial guide sleeve 61 contacts and collides with the lower limit portion 622. At this time, the axial guide sleeve 61 will squeeze the lower limit portion 622, and the limit spring 71 located between the upper limit portion 621 and the lower limit portion 622 will be compressed, so as to achieve the horizontal limitation of the upper mass block 11 by providing a vertical reaction force, further effectively avoiding the direct lateral collision between the mass unit 1 and the controlled structure 4, thereby improving the safety and reliability of the shock absorber and ensuring the safe operation of the controlled structure 4.

[0056] More preferably, a limit buffer 72 is provided at the lower center of the lower mass block 12. When the upper mass block 11 is horizontally displaced and the limit spring 71 is triggered to limit, when the vibration amplitude of the shock absorber further increases, the horizontal guide device will limit with the limit buffer 72, further preventing the occurrence of over-limit collision. In this embodiment, the limit buffer 72 is a rubber limit buffer.

[0057] It can be seen that the present invention has four-level buffering and vibration reduction functions, which are: in daily operating conditions, the linear damping component 31 provides linear damping; when the amplitude of the shock absorber is too large, the linear damping component 31 provides gradually increasing nonlinear damping; when the amplitude of the shock absorber is further increased, the limit spring 71 compresses and deforms to provide damping; when the amplitude swing of the shock absorber increases to exceed the limit position (that is, when the outer periphery of the lower mass block 12 swings to the center position when the lower mass block 12 is not swinging), the limit buffer 72 plays the role of the last level of limit protection. The present invention greatly improves the safety of the shock absorber during over-limit movement through the four-level buffering and vibration reduction of the linear damping component 31, the nonlinear damping component 32, and the limit component 7 (limit spring 71 and limit buffer 72).

[0058] like Figure 6 and Figure 7 As shown, the pendulum tuned mass damper also includes an upper mass block mounting frame 8. The upper mass block 11 is placed on the upper part of the upper mass block mounting frame 8; the lower part of the upper mass block mounting frame 8 is provided with a guide installation space 81. The axial guide sleeve 61 is located in the guide installation space 81, and the axial guide sleeve 61 is installed on the upper mass block mounting frame 8 through a horizontal mounting frame 82. The force of the mass unit 1 is transmitted to the axial guide sleeve 61 through the upper mass block mounting frame 8 and the horizontal mounting frame 82 in turn, so that the axial guide sleeve 61 can move synchronously with the upper mass block 11, ensuring the reliable operation of the vertical guide assembly 6; and its layout structure is simple and compact, and occupies a small space.

[0059] Furthermore, the upper mass block mounting frame 8 includes an upper frame 83, a lower frame 84 and a horizontal connecting plate 85. Among them, the upper mass block 11 is placed on the upper frame 83; the lower frame 84 is provided with a guide installation space 81; the horizontal connecting plate 85 is connected between the upper frame 83 and the lower frame 84 to strengthen the strength of the upper mass block mounting frame 8. The swing arm unit 2 includes a swing arm 21 and a fixed connecting member 22. The horizontal connecting plate 85 is provided with a hinge hole with an arc-shaped inner side wall. The swing arm 21 passes through the hinge hole and is fixed to the lower frame 84 through the fixed connecting member 22. At this time, the hinge point of the swing arm 21 is located at the hinge hole position, and the bearing point of the swing arm 21 is located at the connection of the lower frame 84, so as to separate the rotation of the swing arm 21 and the load-bearing function of the mass unit 1, thereby improving the safety, stability and service life of the swing arm unit 2.

[0060] like Fig. 9 As shown, the horizontal guide assembly 5 includes a double rail assembly 51, and the double rail assembly 51 includes an upper rail component and a lower rail component. The lower rail 511 of the lower rail component is four lower rails 511 arranged in a cross shape, the lower slider 512 of the lower rail component is vertically cross-connected with the upper slider 513 of the upper rail component, and the lower mass block 12 is installed on the upper rail 514 of the upper rail component through the lower mounting frame 121; the limit buffer 72 is arranged at the center of the lower rail 511 arranged in a cross shape; the linear damping assembly 31 is arranged at the four corners of the lower mounting frame 121. The double rail assembly 51 is supported on the controlled structure 4, and the movement of the lower mass block 12 in any horizontal direction can be realized by superimposing the movements of the double rail assembly 51 in mutually perpendicular directions. It is easy to install, compact in structure design, and occupies little space. In other embodiments, any structure of the horizontal guide assembly 5 that can realize the horizontal movement of the lower mass block 12 in any horizontal direction should be within the protection scope of the present invention. For example, it can also be set to multiple bull's eye bearings 52, and the linear damping assembly 31 and the bull's eye bearings 52 are staggered and installed on the lower mounting frame 121.

[0061] In this embodiment, the linear damping component 31 is an eddy current damping component, which includes an energy-consuming magnetic steel 311 and a conductor plate 312 arranged relatively, wherein the energy-consuming magnetic steel 311 is fixed to the lower mass block 12, and the conductor plate 312 is fixed to the controlled structure 4. When the mass unit 1 swings, the energy-consuming magnetic steel 311 and the conductor plate 312 produce relative motion. At this time, the conductor plate 312 cuts the magnetic flux lines, generating an eddy current damping force, so that the energy of the structure during vibration is finally converted into heat energy generated by eddy current heating, thereby achieving the purpose of energy consumption and vibration reduction. In other embodiments, the energy-consuming magnetic steel 311 may be arranged on the controlled structure 4, and the conductor plate 312 may be arranged on the lower mass block 12; the energy-consuming magnetic steel 311 may also be a permanent magnet of other materials.

[0062] In this embodiment, the eddy current damping components are arranged at the four corners of the lower mass block 12 to be staggered with the dual guide rail components 51. In other embodiments, when the horizontal guide component 5 is a bull's eye bearing 52, the eddy current damping components can be staggered according to the setting position of the bull's eye bearing 52, such as setting the bull's eye bearing 52 at the four corners of the lower mass block 12, and the eddy current damping components are set in the central area or the middle area of ​​the four sides of the lower mass block 12.

[0063] In this embodiment, the mass unit 1 is connected to the controlled structure 4 through the force transmission frame 9, and the force transmission frame 9 includes a mounting frame 91, a horizontal mounting plate 92 and a force transmission frame 93. Among them, the mounting frame 91 is sleeved on the outside of the mass unit 1; the horizontal mounting plate 92 is arranged at the bottom of the mounting frame 91; the force transmission frame 93 is connected between the mounting frame 91 and the controlled structure 4; the swing arm unit 2 is connected to the controlled structure 4 through the mounting frame 91 and the force transmission frame 93 in turn. The vibration of the controlled structure 4 of the present invention is transmitted to the mass unit 1 through the force transmission frame 93, the force transmission frame 9 and the swing arm unit 2 in turn. The horizontal guide assembly 5 and the linear damping assembly 31 are installed between the lower mass block 12 and the horizontal mounting plate 92, and the overall structure is simple and the layout is compact.

[0064] In this embodiment, the force transmission frame 93 includes a mounting ring 931 and two force transmission mounting rods 932. Among them, the mounting ring 931 is fitted with the inner wall of the controlled structure 4 and is fixedly connected; the two force transmission mounting rods 932 are parallel to each other, and the two ends of the force transmission mounting rods 932 are fixedly connected to the mounting ring 931. The horizontal mounting plate 92 and the mounting frame 91 are both installed on the force transmission mounting rods 932, so that the force of the controlled structure 4 can be effectively transmitted to the shock absorber, and its layout is compact and occupies a small space. In other embodiments, the mounting ring 931 can also be adjusted according to the shape of the controlled structure 4, as long as it is effectively fitted with the inner wall of the controlled structure 4 and the force is reliably transmitted to the shock absorber.

[0065] More preferably, if Figures 1 to 3 As shown, the installation force transmission frame 9 also includes a height adjustment component 10, which includes a lifting adjustment frame 101, a lifting adjustment rope 102 and a rope body fixing frame 103. Among them, the swing arm 21 of the swing arm unit 2 is connected to the outer periphery of the mass unit 1, and the swing arm 21 is hinged to the lifting adjustment frame 101. The hinge position of the swing arm 21 can adjust the swing length; the lifting adjustment frame 101 can be vertically slidably installed on the installation frame 91; the rope body fixing frame 103 is arranged above the lifting adjustment frame 101; the bottom end of the lifting adjustment rope 102 is fixedly connected to the lifting adjustment frame 101, and the top end of the lifting adjustment rope 102 is connected to the rope body fixing frame 103 through the rope body clamping limiter 104 so as to be height-adjustable.

[0066] When the height of the swing arm 21 needs to be adjusted, the lifting and adjusting rope 102 can be lifted and lowered through the rope body clamping limiter 104, so that the lifting and adjusting frame 101 located at the bottom of the lifting and adjusting rope 102 can be lifted and lowered synchronously to realize the lifting and lowering of the swing arm 21. The present invention realizes the lifting and adjusting function of the swing arm 21, so that the vibration frequency and damping coefficient of the mass unit 1 can be flexibly adjusted, which greatly provides effective application of the shock absorber in different occasions. In this embodiment, the lifting and adjusting rope 102 can be a wire rope or a chain.

[0067] In this embodiment, there are two linear dampers 321, which are symmetrically arranged on opposite sides of the mass unit 1, and the two ends of each linear damper 321 are respectively hinged to the upper mass block mounting frame 8 and the lower mounting frame 121. In other embodiments, the number of linear dampers 321 can be adjusted according to actual vibration reduction requirements, such as linear dampers 321 can be set on all four sides of the mass unit 1, and one or more linear dampers 321 can be set on a single side.

[0068] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pendulum-type tuned mass damper, comprising a mass unit, a swing arm unit and an energy dissipation unit, characterized in that: The mass unit includes an upper mass block and a lower mass block, the upper mass block is swingably connected to the controlled structure through the swing arm unit, and the lower mass block is horizontally movably supported on the controlled structure through a horizontal guide component; the energy dissipation unit includes a linear damping component and a nonlinear damping component, the linear damping component is arranged at the bottom of the lower mass block, the nonlinear damping component includes linear dampers symmetrically arranged on both sides of the mass unit, and the upper mass block is connected to the lower mass block through the linear damper.

2. The pendulum tuned mass damper according to claim 1, characterized in that: It also includes a vertical guide assembly, which includes an axial guide sleeve and a guide rod that are socketed with each other, the axial guide sleeve is vertically installed on the upper mass block, the guide rod is fixed to the lower mass block, the top end of the guide rod passes through the axial guide sleeve, and the top end of the guide rod is provided with an upper limit portion to prevent the upper mass block and the lower mass block from detaching from each other.

3. The pendulum tuned mass damper according to claim 2, characterized in that: It also includes a limit spring to prevent the mass unit from over-limit collision. The guide rod is provided with a lower limit portion that can move axially along the guide rod. The limit spring is installed between the upper limit portion and the lower limit portion. An over-limit collision space is reserved between the axial guide sleeve and the lower limit portion so that they can contact each other when the upper mass block exceeds the limit displacement.

4. The pendulum tuned mass damper according to claim 3, characterized in that: It also includes an upper mass block mounting frame, the upper mass block is placed on the upper part of the upper mass block mounting frame, the lower part of the upper mass block mounting frame is provided with a guide installation space, the axial guide sleeve is located in the guide installation space and is installed on the upper mass block mounting frame through a horizontal mounting frame.

5. The pendulum tuned mass damper according to claim 4, characterized in that: The upper mass block mounting frame includes an upper frame body for placing the upper mass block, a lower frame body for setting a guide installation space, and a horizontal connecting plate connecting the upper frame body and the lower frame body. The swing arm unit includes a swing arm and a fixed connecting piece. The horizontal connecting plate is provided with a hinge hole with an arc-shaped inner side wall. The swing arm passes through the hinge hole and is fixed to the lower frame body through the fixed connecting piece.

6. The pendulum tuned mass damper according to any one of claims 1 to 5, characterized in that: A position-limiting buffer portion is provided at the center position of the lower side of the lower mass block, and the position-limiting buffer portion cooperates with the horizontal guide assembly in a position-limiting manner when the lower mass block moves to a preset limit position.

7. The pendulum tuned mass damper according to claim 6, characterized in that: The horizontal guide assembly includes a double rail assembly or a plurality of bull's eye bearings; The double rail assembly comprises an upper rail component and a lower rail component, the lower rail of the lower rail component is four lower rails arranged in a cross shape, the lower slider of the lower rail component is vertically cross-connected with the upper slider of the upper rail component, the lower mass block is installed on the upper rail of the upper rail component through a lower mounting frame; the limit buffer portion is arranged at the center of the lower rail arranged in a cross shape; the linear damping assembly is arranged at the four corners of the lower mounting frame; When the horizontal guide assembly includes a plurality of bull's eye bearings, the linear damping assembly and the bull's eye bearings are staggered and arranged on the lower mounting frame.

8. The pendulum tuned mass damper according to any one of claims 1 to 5, characterized in that: The mass unit is connected to the controlled structure through an installation force transmission frame, and the installation force transmission frame includes a mounting frame sleeved on the outside of the mass unit, a horizontal mounting plate arranged at the bottom end of the mounting frame, and a force transmission frame connected between the mounting frame and the controlled structure; the swing arm unit is connected to the controlled structure through the mounting frame and the force transmission frame in turn; the horizontal guide assembly and the linear damping assembly are installed between the lower mass block and the horizontal mounting plate.

9. The pendulum tuned mass damper according to claim 8, characterized in that: The force transmission mounting frame also includes a height adjustment component for adjusting the height of the swing arm unit, and the height adjustment component includes a lifting adjustment frame, a lifting adjustment rope and a rope fixing frame, the swing arm unit is hinged to the lifting adjustment frame, the lifting adjustment frame can be vertically slidably mounted on the mounting frame, the rope fixing frame is arranged above the lifting adjustment frame, the bottom end of the lifting adjustment rope is fixedly connected to the lifting adjustment frame, and the top end of the lifting adjustment rope is connected to the rope fixing frame through a rope body clamping limiter so as to be adjustable in height.

10. The pendulum tuned mass damper according to any one of claims 1 to 5, characterized in that: The linear damping component is an eddy current damping component, which includes an energy-dissipating magnetic steel and a conductor plate. The energy-dissipating magnetic steel and the conductor plate are arranged relatively between the lower mass block and the controlled structure.

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