Particle damper with adjustable baffle angle

Abstract

The utility model provides a baffle angle adjustable particle damper which comprises a damping box, a plurality of baffles and a driving assembly, and the damping box is provided with a damping cavity used for containing particles. The multiple baffles are rotationally connected into the damping cavity through a rotating shaft, a main shaft of the rotating shaft extends horizontally, and the multiple baffles are arranged in a square matrix mode; the driving assembly is arranged in the damping box and connected with one ends of the rotating shafts, and the driving assembly can rotationally drive the multiple rotating shafts to synchronously rotate so as to adjust the angle of the baffle. According to the particle damper with the angle-adjustable baffle, the particle damping characteristic can be flexibly adjusted and controlled, and the energy dissipation efficiency, the vibration adaptability and the overall damping performance are improved.

Description

Technical Field

[0001] This utility model belongs to the field of particle damper technology, and more specifically, it relates to a particle damper with adjustable baffle angle. Background Technology

[0002] A particle damper is a passive vibration reduction device that dissipates energy through inelastic collisions and friction between particles encapsulated within a cavity and between particles and the cavity wall. It has advantages such as simple structure, no need for external energy input, high temperature resistance, and adaptability to multi-frequency vibrations, and has been widely used in spacecraft structures, electronic equipment supports, vehicle suspension systems, and vibration protection for precision instruments.

[0003] In existing technologies, particle dampers are mostly designed with a single cavity inside, filled with granular materials such as metal or ceramics. This means that the movement trajectory and distribution of the particles are fixed after manufacturing. When faced with multi-frequency broadband vibrations or excitation environments with large directional changes, this structure often suffers from reduced vibration reduction or even failure. Utility Model Content

[0004] This utility model provides a particle damper with adjustable baffle angle, which can flexibly control the particle vibration reduction characteristics, improve energy dissipation efficiency, vibration adaptability and overall vibration reduction performance.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An adjustable baffle angle particle damper is provided, comprising a damping box, several baffles, and a drive assembly. The damping box has a damping cavity for accommodating particles; several baffles are rotatably connected to the damping cavity via rotating shafts, the main shaft of the rotating shafts extending horizontally, and the several baffles arranged in a square matrix; the drive assembly is disposed within the damping box and connected to one end of the rotating shafts, and the drive assembly can rotate to drive several rotating shafts to rotate synchronously to adjust the angle of the baffles.

[0006] In one possible implementation, the damping box has a drive cavity spaced apart from the damping cavity, the drive cavity and the damping cavity are spaced apart along the axial direction of the rotating shaft, and the drive assembly is located in the drive cavity.

[0007] In some embodiments, there are nine baffles, and the drive assembly includes nine gears that are connected one-to-one with the nine rotating shafts, with adjacent gears meshing with each other.

[0008] In some embodiments, a drive block extending to the outside of the damping box is connected to the gear located in the middle.

[0009] In some embodiments, the drive block has a rectangular cross-section, and a knob is provided on the outer wall of the damping box. The end face of the knob is provided with a slot for insertion and engagement with the drive block.

[0010] In some embodiments, the outer sidewall of the drive block is provided with an outwardly arc-shaped protrusion, and the inner sidewall of the slot is provided with a receiving groove for accommodating the protrusion.

[0011] In some embodiments, the outer wall of the damping box is provided with a plurality of scale blocks circumferentially spaced around the knob, and the outer wall of the knob is provided with a pointer.

[0012] In one possible implementation, the two ends of the shaft are rotatably connected to the damping box via bearings.

[0013] In one possible implementation, the damping box includes an upward-facing box body and a cover disposed on the box body for sealing the opening.

[0014] In one possible implementation, the end of the shaft away from the drive assembly extends to the outside of the damping box, and a pin hole is provided radially through the outer end of the shaft, into which a cotter pin is inserted.

[0015] The baffle angle adjustable particle damper provided in this embodiment, compared with the prior art, can change the particle motion path and collision mode by adjusting the internal baffle angle to match different excitation frequencies, thereby achieving flexible control of particle vibration reduction characteristics, improving energy dissipation efficiency, vibration adaptability and overall vibration reduction performance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the baffle angle adjustable particle damper provided in an embodiment of this utility model;

[0018] Figure 2 Another structural schematic diagram of the baffle angle adjustable particle damper provided in an embodiment of this utility model;

[0019] Figure 3 A schematic diagram of the disassembly structure of the baffle angle adjustable particle damper provided in this embodiment of the utility model;

[0020] Figure 4 A schematic diagram of the damping box and knob of the baffle angle adjustable particle damper provided in this embodiment of the utility model;

[0021] Figure 5 This is an embodiment of the present utility model. Figure 4A structural diagram of the middle baffle, rotating shaft, cotter pin, and knob;

[0022] Figure 6 This is an embodiment of the present utility model. Figure 1 A schematic diagram of the central knob.

[0023] The following are the labeling elements in the figure:

[0024] 10. Damping box; 11. Box body; 111. Damping cavity; 112. Drive cavity; 12. Cover; 20. Baffle; 30. Shaft; 31. Pin hole; 40. Drive assembly; 41. Gear; 42. Drive block; 421. Protrusion; 50. Knob; 51. Slot; 52. Receiving groove; 53. Pointer; 60. Scale block; 70. Bearing; 80. Cotter pin. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a number" means two or more, unless otherwise explicitly specified.

[0027] A particle damper is a passive vibration reduction device that dissipates energy through inelastic collisions and friction between particles encapsulated within a cavity and between particles and the cavity wall. It has advantages such as simple structure, no need for external energy input, high temperature resistance, and adaptability to multi-frequency vibrations, and has been widely used in spacecraft structures, electronic equipment supports, vehicle suspension systems, and vibration protection for precision instruments.

[0028] In existing technologies, particle dampers are mostly designed with a single cavity inside, filled with granular materials such as metal or ceramics. This means that the movement trajectory, movement mode, and distribution of the particles are fixed after manufacturing. When faced with multi-frequency broadband vibrations or excitation environments with large directional changes, this structure often suffers from reduced vibration reduction or even failure.

[0029] Please see Figures 1 to 6 The adjustable baffle angle particle damper provided by this utility model will now be described. The adjustable baffle angle particle damper includes a damping box 10, a plurality of baffles 20, and a drive assembly 40. The damping box 10 has a damping cavity 111 for containing particles; the plurality of baffles 20 are rotatably connected to the damping cavity 111 via a rotating shaft 30, the main shaft of the rotating shaft 30 extending horizontally, and the plurality of baffles 20 are arranged in a square matrix; the drive assembly 40 is disposed in the damping box 10 and connected to one end of the rotating shaft 30, and the drive assembly 40 can rotate to drive the plurality of rotating shafts 30 to rotate synchronously to adjust the angle of the baffles 20.

[0030] This application provides a particle damper with an adjustable baffle angle. In actual use, the flow path, velocity, collision frequency and intensity of particles under vibration will change significantly when the baffle angle is different.

[0031] The 20° angle of the baffle determines the accumulation pattern and dynamic distribution of particles in the cavity, affecting the uniformity and efficiency of energy dissipation.

[0032] The angle change can adjust the relative proportion and intensity of collisions and friction between particles and between particles and baffles 20 / box 11.

[0033] The equivalent mass, stiffness, and damping characteristics of the entire damping system will change due to changes in the particle flow state.

[0034] It can dynamically adjust the angle of the baffle 20 to the optimal value according to the vibration frequency, amplitude or expected damping requirements of the actual structure, so that the damper always works in the most efficient state, overcoming the limitation of traditional fixed baffle 20 dampers that are only effective in a specific frequency band.

[0035] The baffles 20 are arranged in a square matrix, meaning that the baffles 20 are uniformly distributed within the damping cavity 111. This results in:

[0036] Uniform energy dissipation: Vibrational energy can be transferred more evenly to the entire particle bed, avoiding local overload or uneven dissipation.

[0037] Maximize space utilization: Arrange up to 20 baffles within the limited cavity space to increase the energy-consuming interface.

[0038] By adjusting the angle of the baffle by 20°, the width, shape, and collision angle of the particle channel will change, thereby altering the flow pattern and energy dissipation path of the particles during vibration. For example:

[0039] The initial state is set to the vertical state of the baffle 20. When the baffle 20 is adjusted at a small angle, the particles and the baffle 20 mainly rely on sliding friction, and energy is mainly consumed through friction.

[0040] When the baffle 20 is adjusted to a larger angle, the particles will jump and collide in multiple intersecting channels, mainly consuming energy through inelastic collisions.

[0041] The granular material can be steel balls or ceramic spheres with a diameter of up to 22mm, or other materials and shapes. The filling rate can be any value within 90%. By adjusting the internal baffle angle by 20° to match different excitation frequencies, the particle movement path and collision mode can be changed, thereby achieving flexible control of the particle vibration reduction characteristics, improving energy dissipation efficiency, vibration adaptability, and overall vibration reduction performance.

[0042] The baffle angle adjustable particle damper provided in this embodiment, compared with the prior art, can change the particle motion path and collision mode by adjusting the internal baffle angle 20 to match different excitation frequencies, thereby realizing flexible control of particle vibration reduction characteristics, improving energy dissipation efficiency, vibration adaptability and overall vibration reduction performance.

[0043] In one possible implementation, the damping box 10 described above adopts the following... Figure 3 The structure shown is described in the following document. Figure 3 The damping box 10 is provided with a drive cavity 112 spaced apart from the damping cavity 111. The drive cavity 112 and the damping cavity 111 are spaced apart along the axial direction of the rotating shaft 30. The drive assembly 40 is located in the drive cavity 112.

[0044] Specifically, the drive assembly 40 is placed in an independent drive cavity 112 that is spaced apart from the damping cavity 111, which effectively prevents particles in the damping cavity 111 from entering the drive cavity 112, thus avoiding particles from jamming precision transmission components such as gear 41 and bearing 70, which could lead to drive failure, increased wear, or even damage.

[0045] This provides a clean, low-wear working environment for the drive components 40 (gears 41, bearings 70, etc.), significantly improving their reliability and service life.

[0046] The drive chamber 112 is relatively independent and clean, and there is no need to clean particles when maintaining or replacing the drive assembly 40, making the operation simpler.

[0047] In some embodiments, see Figure 3 and Figure 4The baffle 20 has nine baffles, and the drive assembly 40 includes nine gears 41 that are connected one-to-one with the nine rotating shafts 30, with two adjacent gears 41 meshing with each other.

[0048] Specifically, the rigid meshing of gears 41 transmits motion, ensuring that all nine gears 41 (i.e., all nine shafts 30) rotate synchronously. This is the most reliable and precise mechanical method to achieve a strictly consistent deflection angle for all baffles 20.

[0049] Gear 41 has high transmission efficiency and large torque, and can overcome the particle resistance encountered when baffle 20 rotates.

[0050] The gears 41 can be closely arranged in the drive cavity 112, taking up little space.

[0051] The meshing of gear 41 has a certain degree of self-locking (especially at small angles), which helps to maintain the angle stability of baffle 20 when there is no drive input and resists small angle changes caused by vibration or particle pressure.

[0052] In some embodiments, see Figure 3 and Figure 4 A drive block 42 extending to the outside of the damping box 10 is connected to the gear 41 located in the middle.

[0053] Specifically, the center position has the shortest average distance from the other gears 41, the frictional torque and transmission chain deformation that need to be overcome during driving are minimal, and the operation of the knob 50 requires the least effort.

[0054] The driving power is input from the central drive block 42, which makes the load distribution on the entire gear 41 set most uniform, the transmission most stable, and reduces internal stress.

[0055] Only one hole needs to be made in the damping box 10 at the position corresponding to the center gear 41 to lead out the drive block 42, resulting in the simplest external structure.

[0056] The drive block 42 extends to the outside of the damping box 10, providing a physical interface for external operation and is an essential part for realizing the angle adjustment function.

[0057] In some embodiments, see Figure 3 , Figure 4 and Figure 6 The drive block 42 has a rectangular cross-section, and a knob 50 is provided on the outer wall of the damping box 10. The end face of the knob 50 is provided with a slot 51 for insertion and engagement with the drive block 42.

[0058] Specifically, the rectangular cross-section, in conjunction with the matching rectangular slot 51, can transmit large torque without slippage, avoiding the slippage phenomenon that may occur with the circular cross-section.

[0059] The mating surfaces are flat, with no relative rotational clearance, ensuring that the angle transmission between the knob 50 and the drive block 42 (and consequently the baffle 20) is lag-free.

[0060] Knob 50 is the most ergonomically designed manual rotary operating component, allowing users to directly apply rotational force.

[0061] The slot 51 design allows the knob 50 to be easily inserted into or removed from the drive block 42, facilitating the disassembly of the knob 50.

[0062] The inner peripheral wall of slot 51 is pressed against the outer peripheral wall of drive block 42, which improves the stability of the insertion.

[0063] In some embodiments, see Figure 3 , Figure 4 and Figure 6 The outer side wall of the drive block 42 is provided with an outwardly arc-shaped protrusion 421, and the inner side wall of the slot 51 is provided with a receiving groove 52 for accommodating the protrusion 421.

[0064] Specifically, once the knob 50 is inserted into the drive block 42, the protrusion 421 engages with the receiving groove 52, forming a mechanical interlock structure. This effectively prevents the knob 50 from accidentally dislodging from the drive block 42 during operation (especially under conditions of high torque or vibration), ensuring operational safety and reliability.

[0065] Additional constraint points enhance the connection rigidity between knob 50 and drive block 42, reducing minor wobble.

[0066] In some embodiments, see Figure 1 , Figure 3 and Figure 6 The outer wall of the damping box 10 is provided with several scale blocks 60 arranged circumferentially around the knob 50, and the outer wall of the knob 50 is provided with a pointer 53.

[0067] Specifically, the scale block 60 is fixed to the damping box 10 (representing a reference point), and the pointer 53 is fixed to the knob 50 (rotating synchronously with the knob 50 and the baffle 20). The pointer 53 points to the reading on the scale block 60, directly and intuitively indicating the current angular position of the baffle 20.

[0068] The optimal baffle 20 angle required for a specific vibration problem can be determined based on theory, experience, or test results. The baffle 20 can be precisely adjusted to this angle using a scale, and the result can be recorded.

[0069] If repeated adjustments are required or switching is needed under different operating conditions, the scale system ensures that the previously effective angle settings can be accurately reproduced.

[0070] During the damper commissioning phase, different angles can be systematically tested and their corresponding damping effects recorded to quickly find the optimal solution.

[0071] In one possible implementation, the aforementioned rotating shaft 30 adopts as follows: Figure 4 and Figure 5 The structure shown is described in the following document. Figure 4 and Figure 5 The two ends of the rotating shaft 30 are rotatably connected to the damping box 10 through bearings 70.

[0072] Specifically, the bearing 70 (such as the rolling bearing 70) significantly reduces the frictional resistance when the shaft 30 rotates, making the drive assembly 40 (especially the manual knob 50) easier and less strenuous to operate.

[0073] It provides precise rotation guidance to ensure that the rotating shaft 30 (and baffle 20) rotates smoothly and without jamming.

[0074] The two ends support form a stable beam structure, which enhances the rigidity of the rotating shaft 30, resists deformation caused by particle pressure and vibration, and maintains the positional accuracy of the baffle 20.

[0075] Furthermore, the outer wall of the damping box 10 is provided with a through rotating hole for accommodating the bearing 70. At one end of the rotating hole near the damping cavity 111, there is a converging platform at the central axis to limit the displacement of the bearing 70 into the damping cavity 111. Two retaining rings are fitted on the rotating shaft 30. The two retaining rings are located at the two opposite ends of the two bearings 70. The retaining rings are embedded in the inner wall of the rotating hole to limit the displacement of the bearing 70 outward from the damping box 10.

[0076] In one possible implementation, the damping box 10 described above adopts the following... Figures 1 to 3 The structure shown is described in the following document. Figures 1 to 3 The damping box 10 includes a box body 11 with an upward opening and a cover 12 disposed on the box body 11 for sealing the opening.

[0077] Specifically, after opening the cover 12, the damping cavity 111 is completely open, making it very convenient to fill the cavity with damping particles, or to empty the old particles and replace them with particles of different types / sizes. This is crucial for the maintenance and adjustment of the damper (trying different particles).

[0078] When it is necessary to clean the inside of the damping cavity 111 (such as powder or foreign matter accumulated after long-term use), opening the cover 12 is extremely convenient.

[0079] Although the baffle 20 is inside the cavity, the status of the baffle 20 can be checked more intuitively after opening the cover 12.

[0080] In one possible implementation, the aforementioned rotating shaft 30 adopts as follows: Figure 2 and Figure 5 The structure shown is described in the following document. Figure 2 and Figure 5 The end of the rotating shaft 30 away from the drive assembly 40 extends to the outside of the damping box 10. The outer end of the rotating shaft 30 is provided with a pin hole 31 that penetrates radially, and a cotter pin 80 is inserted into the pin hole 31.

[0081] Specifically, after the cotter pin 80 is inserted into the pin hole 31, its two legs open to form a reliable mechanical stop. This effectively prevents the shaft 30 from accidentally moving along its axial direction or completely disengaging from the bearing 70 / box 11 during operation (especially when affected by vibration, particle impact, or temperature changes).

[0082] The cotter pin 80 is a low-cost, easy-to-install (with pliers) and highly reliable axial fastening standard part.

[0083] When it is necessary to disassemble the shaft 30 (for example, to replace the bearing 70 or the baffle 20), simply pull out the cotter pin 80; the operation is simple.

[0084] It provides an important safety barrier to prevent the shaft 30 from accidentally coming off and causing equipment damage or safety hazards.

[0085] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A particle damper with adjustable baffle angle, characterized in that, include: A damping box having a damping cavity for containing particles; Several baffles are rotatably connected to the damping cavity via a rotating shaft, the main shaft of which extends horizontally, and the baffles are arranged in a square matrix; and A drive assembly is disposed inside the damping box and connected to one end of the rotating shaft. The drive assembly can rotate to drive several rotating shafts to rotate synchronously to adjust the angle of the baffle.

2. The baffle angle adjustable particle damper as described in claim 1, characterized in that, The damping box is provided with a drive cavity spaced apart from the damping cavity. The drive cavity and the damping cavity are spaced apart along the axial direction of the rotating shaft, and the drive assembly is located in the drive cavity.

3. The baffle angle adjustable particle damper as described in claim 2, characterized in that, The baffle has nine sections, and the drive assembly includes nine gears that are connected one-to-one with the nine rotating shafts, with two adjacent gears meshing with each other.

4. The baffle angle adjustable particle damper as described in claim 3, characterized in that, A drive block extending to the outside of the damping box is connected to the gear located in the middle.

5. The baffle angle adjustable particle damper as described in claim 4, characterized in that, The drive block has a rectangular cross-section, and a knob is provided on the outer wall of the damping box. The end face of the knob is provided with a slot for insertion and engagement with the drive block.

6. The baffle angle adjustable particle damper as described in claim 5, characterized in that, The outer side wall of the drive block is provided with an outwardly arc-shaped protrusion, and the inner side wall of the slot is provided with a receiving groove for accommodating the protrusion.

7. The baffle angle adjustable particle damper as described in claim 5, characterized in that, The outer wall of the damping box is provided with a number of scale blocks arranged circumferentially around the knob, and the outer wall of the knob is provided with a pointer.

8. The baffle angle adjustable particle damper as described in claim 1, characterized in that, The two ends of the rotating shaft are rotatably connected to the damping box via bearings.

9. The baffle angle adjustable particle damper as described in claim 1, characterized in that, The damping box includes an upward-facing box body and a cover disposed on the box body for sealing the opening.

10. The baffle angle adjustable particle damper as described in claim 1, characterized in that, The end of the rotating shaft away from the drive assembly extends to the outside of the damping box, and a pin hole is provided radially through the outer end of the rotating shaft, into which a cotter pin is inserted.

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