A spherical gear-type dual-mass pendulum multidimensional vibration damper

Abstract

This invention belongs to the field of structural vibration reduction technology, and relates to a spherical gear-type dual-mass pendulum multi-dimensional vibration damper, including a spherical gear transmission unit, a dual-mass pendulum main body unit, and a unidirectional damping energy dissipation unit. The spherical gear transmission unit is used to convert multi-dimensional vibration motion into unidirectional rotational motion; the dual-mass pendulum main body unit can achieve extremely low frequencies; and the unidirectional damping energy dissipation unit is used to dissipate vibration energy. This invention eliminates the dependence of the frequency of traditional pendulum structures on the pendulum length, and can achieve extremely low frequencies within a limited space; in the energy dissipation path, the spherical gear transmission unit converts three-dimensional rotational motion into unidirectional motion before energy dissipation and vibration reduction, avoiding the problem of requiring distributed energy dissipation units in multi-dimensional vibration reduction of traditional pendulum dampers. Compared with traditional single-pendulum tuned mass dampers, this damper design provides a more space-efficient vibration reduction solution for highly flexible engineering structures.

Description

Technical Field

[0001] This invention belongs to the field of structural vibration reduction technology and relates to a spherical gear-type dual-mass pendulum multi-dimensional vibration damper. Background Technology

[0002] Vibration is a common problem in highly flexible engineering structures. Super high-rise buildings, long-span bridges, offshore wind turbines, and photovoltaic supports in mountainous areas can all be subjected to external loads, resulting in severe vibrations that affect structural functionality and safety. Therefore, effectively suppressing vibrations in highly flexible engineering structures is one of the most important problems that urgently needs to be solved in the field of civil engineering.

[0003] Current vibration control schemes are mainly classified into three categories based on their control mechanisms: passive, active, and semi-active control. Among them, passive control devices are widely used in various highly flexible engineering structures due to their simple principle, easy construction, low cost, and lack of external power supply. Tuned mass dampers are one of the most representative passive vibration reduction devices, with the single-pendulum tuned mass damper technology being the most mature. However, traditional single-pendulum tuned mass dampers have technical limitations: the first-order natural frequency of large, highly flexible engineering structures is generally low, requiring a huge pendulum length to achieve optimal vibration reduction control, which places high demands on installation space; even with nested support optimization in some projects, it is difficult to significantly shorten the pendulum length, thus limiting its widespread use in highly flexible structures. Furthermore, due to the multi-dimensional motion of the mass body, the energy dissipation unit assembly of traditional single-pendulum tuned mass dampers often involves distributing and connecting the pendulum's mass body with multiple energy dissipation dampers for multi-dimensional energy dissipation, which also leads to a large space requirement. Summary of the Invention

[0004] To overcome the problem of large installation space occupation of traditional single pendulum dampers, this invention provides a spherical gear type dual-mass pendulum multi-dimensional vibration damping damper. Based on the dual-mass pendulum structure, it achieves extremely low frequencies in limited space. By introducing a spherical gear transmission method, the multi-dimensional motion of the pendulum is transformed into unidirectional rotation and energy dissipation, thus solving the problem of low space efficiency of single pendulum dampers in low-frequency vibration reduction applications.

[0005] The technical solution provided by this invention is as follows: A spherical gear type dual-mass pendulum multi-dimensional vibration damping device includes a spherical gear transmission unit, a support unit, a dual-mass pendulum main body unit, and a unidirectional damping energy dissipation unit; the spherical gear transmission unit is mounted on the support unit and connected to the dual-mass pendulum main body unit and the unidirectional damping energy dissipation unit; the spherical gear transmission unit includes a main spherical gear and a driven gear; the dual-mass pendulum main body unit generates multi-dimensional oscillation under external excitation, driving the spherical gear transmission unit to rotate, and then transmitting the energy to the unidirectional damping energy dissipation unit through the transmission component to achieve energy dissipation.

[0006] Preferably, the dual-mass pendulum main unit includes a first mass body, a second mass body, and a rigid rod, with both ends of the rigid rod connected to the first mass body and the second mass body, respectively; the main spherical gear is mounted on the rigid rod and meshes with the driven gear.

[0007] Preferably, the first mass and the second mass are movable along a rigid rod.

[0008] Preferably, the main spherical gear and the driven gear are respectively provided with protective covers.

[0009] Preferably, the unidirectional damping energy dissipation unit includes a damper, which is an electromagnetic damper or a viscous damper.

[0010] This invention pertains to passive dampers and addresses the issues of low space efficiency caused by the long pendulum length required for optimized low-frequency vibration reduction in traditional single-pendulum dampers and the need for distributed energy-dissipating dampers for three-dimensional vibration reduction. By utilizing the coordinated oscillation of the two masses in the dual-mass pendulum main unit, the damper frequency is freed from dependence on pendulum length. Furthermore, a spherical gear transmission unit transforms the multi-dimensional motion of the two masses into unidirectional rotation for energy dissipation, eliminating the reliance on distributed energy-dissipating dampers in traditional multi-dimensional vibration reduction. This ultimately improves space efficiency. Compared to traditional single-pendulum dampers, this invention requires less space, has higher space utilization, and can potentially achieve vibration control across a wider frequency range, providing an effective solution for the vibration reduction needs of highly flexible engineering structures. Attached Figure Description

[0011] Figure 1 is a perspective view of the spherical gear-type dual-mass pendulum multi-dimensional vibration damping device of the present invention; Figure 2 is a left view of the spherical gear-type dual-mass pendulum multi-dimensional vibration damping device of the present invention; Figure 3 is a front view of the spherical gear-type dual-mass pendulum multi-dimensional vibration damping device of the present invention; Figure 4 is a top view of the spherical gear-type dual-mass pendulum multi-dimensional vibration damping device of the present invention. Figure 5 is a detailed view of the spherical gear transmission unit of the spherical gear type dual-mass pendulum multi-dimensional vibration damping device of the present invention. In the diagram: First mass body-1, Second mass body-2, Rigid rod-3, Main spherical gear-4, Driven gear-5, Drive shaft-6, First protective cover-7, Second protective cover-8, First support-9, Second support-10, Energy dissipating damper-11, Energy dissipating damper bracket-12, Coupling-13, Mounting base plate-14. Detailed Implementation

[0012] To facilitate understanding of the present invention, the spherical gear-type dual-mass pendulum multidimensional vibration damping device of the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. The accompanying drawings show preferred embodiments of the present invention; however, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

[0013] This embodiment provides a spherical gear type dual-mass pendulum multidimensional vibration damping device, including a spherical gear transmission unit, a support unit, mounting components, a dual-mass pendulum main body unit, a unidirectional damping energy dissipation unit, and other necessary auxiliary components. The dual-mass pendulum main body unit is used to capture the multidimensional vibration energy of the structure being damped, the spherical gear transmission unit realizes the conversion of multidimensional motion into unidirectional rotation, the unidirectional damping energy dissipation unit completes the dissipation of vibration energy, and the support unit and mounting components provide fixed support for each corresponding unit.

[0014] like Figure 1-5 As shown, the main body of the dual-mass pendulum includes a first mass 1, a second mass 2, and a rigid rod 3. The lower end of the rigid rod 3 is connected to the first mass 1, and the upper end of the rigid rod 3 is connected to the second mass 2. The spherical gear transmission unit includes a main spherical gear 4, a driven gear 5, and a transmission shaft 6. The driven gear 5 is located on one side of the main spherical gear 4 and meshes with it. The main spherical gear 4 is mounted on the rigid rod 3 and is located between the first mass 1 and the second mass 2. The frequency of the dual-mass pendulum damper can be adjusted by adjusting the distance ratio between the first mass 1 and the second mass 2 and the main spherical gear 4. The distance ratio can be flexibly adjusted according to the target vibration reduction frequency to adapt to the low-frequency vibration reduction requirements under different working conditions.

[0015] In other embodiments of the present invention, stepper motors can be installed inside the first mass body 1 and the second mass body 2 to achieve position adjustment of the first mass body 1 and the second mass body 2.

[0016] The main spherical gear 4 is installed inside the first protective cover 7, which is fixed to one end of the first support 9. The main spherical gear 4 can achieve multi-dimensional rotational transmission. The driven gear 5 is installed inside the second protective cover 8, which is fixed to one side of the second support 10. The driven gear 5 converts the multi-dimensional rotation of the main spherical gear 4 into unidirectional rotation. The transmission shaft 6 passes through the center of the driven gear 5 and rotates in the same phase as the driven gear 5. The spherical gear transmission unit converts the multi-dimensional motion of the first mass body 1 and the second mass body 2 into unidirectional rotation and transmits it to the transmission shaft 6.

[0017] The unidirectional damping energy dissipation unit includes an energy dissipation damper 11, an energy dissipation damper bracket 12, and a coupling 13. The energy dissipation damper bracket 12 is fixed to one side of the second support 10. The energy dissipation damper 11 is mounted on the energy dissipation damper bracket 12. The input end of the energy dissipation damper 12 is connected to one end of the drive shaft 6 via the coupling 13. The damping coefficient of the energy dissipation damper 11 can be adjusted according to the vibration reduction requirements for damping optimization. It should be noted that the energy dissipation damper 11 in this part is not limited to a certain type of damper, including electromagnetic dampers, viscous dampers, etc.

[0018] The support unit and mounting components include a first support 9, a second support 10, a first protective cover 7, a second protective cover 8, and a mounting base plate 14, which are used to fix the entire transmission mechanism and provide stable support and positioning reference. The first protective cover 7 is used to support the main spherical gear 4 and serves as a dustproof cover. The second protective cover 8 is installed at the driven gear 5, covering the driven gear 5 and serving as a dustproof cover and protection. The bottom ends of the first support 9 and the second support 10 are connected to the mounting base plate 14.

[0019] The dual-mass pendulum damper is also equipped with various necessary auxiliary components, including fasteners and seals, namely bolts, sealing rings, bearings, etc., which are hidden in the device to fix the components and ensure the sealing of the transmission mechanism.

[0020] The assembly sequence of the dual-mass pendulum damper of the present invention is as follows: a first protective cover 7 and a main spherical gear 4 are installed at one end of the first support 9; a second protective cover 8 and a driven gear 5 are installed at one end of the second support 10; the main spherical gear 4 and the driven gear 5 are engaged by gear meshing; the rigid rod 3 of the dual-mass pendulum main unit is fixed to the main spherical gear 4, and the first mass body 1 and the second mass body 2 are installed at the designed positions on the rigid rod 3; the energy dissipation damper bracket 12 is connected to the second support 10; a drive shaft 6 is installed at the center of the driven gear 5, the drive shaft 6 is connected to the coupling 13, and then connected to the energy dissipation damper 11; the energy dissipation damper 11 is fixed on the energy dissipation damper bracket 12; the first support 9 and the second support 10 are fixed on the mounting base plate 14.

[0021] Based on this, the vibration control implementation process in this invention is briefly described from a principle perspective. When the spherical gear-type dual-mass pendulum multi-dimensional vibration damper is subjected to external excitation, the first mass 1 and the second mass 2 on the rigid shaft 3 begin to oscillate in multiple dimensions. The main spherical gear 4 rotates, driving the driven gear 5 to rotate unidirectionally, thereby causing the transmission shaft 6 at the center of the driven gear 5 to rotate in the same phase. The transmission shaft 6 is connected to an energy-dissipating damper 11 for energy dissipation, thus converting multi-dimensional motion into unidirectional rotation and dissipating energy, ultimately achieving multi-dimensional vibration reduction.

[0022] The frequency of the two-mass pendulum damper can be expressed as: ; in f dmp For a two-mass pendulum damper to the natural frequency, The distance from the first mass body 1 to the main spherical gear 4 is [missing information]. The distance from the second mass body 2 to the main spherical gear 4 is [missing information]. This is the acceleration due to gravity.

[0023] In summary, the spherical gear-type dual-mass pendulum multi-dimensional vibration damping device provided by this invention is based on the special design of spherical gears that can rotate in multiple dimensions, enabling the original device to sense external excitations in multiple dimensions and dissipate energy in one direction, thus avoiding the space occupation of traditional multi-dimensional vibration damping distributed energy dissipation; at the same time, the frequency dependence of the dual-mass pendulum damper on the pendulum length is reduced, which also improves space efficiency.

[0024] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A spherical gear-type dual-mass pendulum multi-dimensional vibration damping device, characterized in that: It includes a spherical gear transmission unit, a support unit, a dual-mass pendulum main body unit, and a unidirectional damping energy dissipation unit. The spherical gear transmission unit is mounted on the support unit and connected to the dual-mass pendulum main body unit and the unidirectional damping energy dissipation unit. The spherical gear transmission unit includes a main spherical gear and a driven gear. The dual-mass pendulum main body unit generates multi-dimensional oscillation under external excitation, driving the spherical gear transmission unit to rotate, and then transmitting the energy to the unidirectional damping energy dissipation unit through the transmission assembly to achieve energy dissipation.

2. The spherical gear-type dual-mass pendulum multi-dimensional vibration damper according to claim 1, characterized in that: The main unit of the dual-mass pendulum includes a first mass body, a second mass body, and a rigid rod. The two ends of the rigid rod are connected to the first mass body and the second mass body, respectively. The main spherical gear is mounted on the rigid rod and meshes with the driven gear.

3. The spherical gear-type dual-mass pendulum multi-dimensional vibration damper according to claim 2, characterized in that: The first mass and the second mass can move along the rigid rod.

4. The spherical gear-type dual-mass pendulum multi-dimensional vibration damper according to claim 1, characterized in that: The main spherical gear and the driven gear are respectively provided with protective covers.

5. The spherical gear-type dual-mass pendulum multi-dimensional vibration damper according to claim 1, characterized in that: The unidirectional damping energy dissipation unit includes a damper, which is an electromagnetic damper or a viscous damper.

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