Adjustable particle damper
By designing an adjustable particle damper and using adjustment components to adjust the size and spacing of obstacles, the problem of vibration reduction that cannot be adapted to different frequencies of transformers in existing technologies has been solved, and the best vibration reduction effect under different working conditions has been achieved.
Patent Information
- Application Number
- CN202422265423.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-09-14
AI Technical Summary
The existing particle damper has a fixed structure and cannot meet the vibration reduction requirements of transformers at different frequencies.
Design an adjustable particle damper that adjusts the size and spacing of obstacles by adjusting components, including partitions, telescopic frames, grid frames, and drive mechanisms, to achieve the best vibration reduction effect of the particle damper under different working conditions.
When the operating conditions of the transformer change, the size and spacing of obstacles can be automatically or manually adjusted to maintain the best vibration reduction effect, adapt to the vibration requirements at different frequencies, and improve vibration reduction performance.
Smart Images
Figure CN223881604U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field that damps and reduces noise, specifically related to an adjustable granular damper. BACKGROUND
[0002] Power plant equipment has been changed from traditional power frequency operation to frequency conversion operation. Environmental vibration and electromagnetic noise generated by power plant equipment have a greater impact on equipment safe operation, and noise has an adverse effect on the environment.
[0003] The noise of the transformer body is mainly generated by the vibration of the transformer body, and the root cause is the core and winding. The reason for the noise generated by the core is that the silicon steel sheet constituting the core produces a slight size change under the action of the alternating magnetic field due to the magnetostriction effect, and the magnetostriction makes the core vibrate periodically with the excitation frequency. In the transformer, the vibration generated by the core and the winding is transmitted to the oil tank through the transformer oil, the body support and positioning components, and the vibration noise generated by the cooling system is superimposed and radiated to the outside together.
[0004] Granular damping technology is a kind of nonlinear passive damping technology, which fills damping particles in the additional cavity or in the internal space of the damping structure to reduce vibration. With the vibration of the main damping body, the particles in the cavity collide and rub with each other and the inner wall of the cavity, thereby consuming vibration energy and achieving the effect of damping. And the granular damper has the characteristics of simple structure, convenient installation, no change of the original structure, adaptability to harsh environment and high economy.
[0005] For example, the Chinese patent with publication number CN11467720B discloses "a granular damper with an internal obstacle network", which enhances the energy consumption of the granular damper through the internal obstacle network structure;
[0006] Because the working condition of the transformer changes constantly during operation, the structure of the granular damper in the prior art is fixed and cannot adapt to the damping requirements under different frequencies. UTILITY MODEL CONTENT
[0007] In view of the shortcomings of the prior art, the utility model provides an adjustable granular damper and a construction method to solve the above problems.
[0008] The utility model provides the following technical scheme:
[0009] An adjustable granular damper, comprising a container and an obstacle with a three-dimensional network structure arranged in the container, further comprising an adjusting assembly for adjusting the size of the obstacle.
[0010] Preferably, the adjusting assembly comprises a partition plate, and the container is divided into a first cavity and a second cavity by the partition plate.
[0011] The obstacle is arranged in the first cavity, and comprises a telescopic frame and a plurality of groups of grid frames arranged in a one-word equidistant manner on the telescopic frame, and the movable end of the telescopic frame is connected with the partition plate.
[0012] A driving mechanism is connected with the partition plate and used for driving the partition plate to move to adjust the size of the first cavity.
[0013] Preferably, the driving mechanism comprises a telescopic assembly, the telescopic assembly comprises a rotating rod, a first gear and a second gear, one end of the rotating rod is fixed on the partition plate, the other end of the rotating rod penetrates to the outside of the container, the first gear and the second gear are in meshing and rotationally arranged on the inner side wall of the second cavity, the first gear is coaxially and threadedly connected with the rotating rod, and the second gear is connected with a driving rod.
[0014] Preferably, a plug hole is coaxially arranged on the second gear, and the driving rod and the plug hole are detachably inserted and matched.
[0015] Preferably, the driving rod is arranged on the output end of a motor, and the motor is detachably arranged on the outer side wall of the container.
[0016] Preferably, the driving rod and the clamping tooth block are magnetically repelled and matched, and the clamping tooth block is kept in meshing with the clamping tooth block through an elastic element.
[0017] Preferably, a scale is arranged on the rotating rod penetrating to the outside of the container in the length direction.
[0018] Preferably, the obstacle comprises a plurality of grid frames arranged in parallel at equal intervals, and two adjacent grid frames are connected through telescopic rods.
[0019] The adjusting assembly comprises a stud rotationally matched with the container, and the stud is threadedly connected with each grid frame.
[0020] Preferably, the telescopic rod is hollow for the stud to pass through, and a grid groove is arranged on the inner side wall of the container, and the contour of the grid groove is matched with the contour of the grid frame.
[0021] Preferably, the inner side wall of the container is provided with soundproof cotton.
[0022] The utility model has the following beneficial technical effects:
[0023] The utility model discloses a built-in three -dimensional network structure's obstacle enhances the energy consumption of particle damper, and the size of the first cavity that has the damping particle can be adjusted through the position of the baffle in the container, and the space size can be adjusted, and telescopic frame follows and adjusts, and then the distance between two adjacent grid frames is adjusted, or the size of the obstacle is adjusted through stud, when the transformer operating condition changes through the above setting, the obstacle changes and reaches the size of prearranged, thereby the particle damper can exert better damping effect under each power frequency. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is the three -dimensional structure schematic diagram of the utility model;
[0025] Figure 2 It is the grid frame structure schematic diagram of the utility model;
[0026] Figure 3 It is the telescopic frame structure schematic diagram of the utility model;
[0027] Figure 4 It is the motor and telescopic component structure schematic diagram of the utility model;
[0028] Figure 5 It is Figure 4 The partial A enlarged schematic diagram of;
[0029] Figure 6 It is the obstacle structure schematic diagram in the second embodiment of the utility model;
[0030] Figure 7 It is the telescopic rod and stud cooperation schematic diagram in the second embodiment of the utility model;
[0031] Figure 8 It is the grid slot structure schematic diagram of the utility model.
[0032] The reference signs in the drawing are:
[0033] 1, container; 11, grid slot; 2, baffle; 3, grid frame; 31, telescopic rod; 4, telescopic frame; 5, guide rod; 6, telescopic component; 61, rotating rod; 611, thread; 62, first gear; 63, second gear; 631, jack; 64, pawl block; 65, elastic piece; 7, motor; 71, driving rod; 8, stud. DETAILED DESCRIPTION
[0034] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of the utility model protection.
[0035] Embodiment one
[0036] A tunable particle damper, as shown in Figures 1-5 :
[0037] The container 1 includes a cuboid structure, and the adjusting assembly is a partition plate 2 arranged in the container 1, the partition plate 2 can slide linearly in the container 1, the partition plate 2 divides the inner cavity of the container 1 into a first cavity and a second cavity which are independent of each other, and the first cavity is internally provided with an obstacle and damping particles;
[0038] As shown in Figures 1-3 , the obstacle includes a telescopic frame 4 and a plurality of grid frames 3, one end of the telescopic frame 4 is mounted on the inner side wall of the first cavity, the other end (movable end) of the telescopic frame 4 is mounted on the partition plate 2, and the plurality of grid frames 3 are installed at nodes of the telescopic frame 4 in a linear and equidistant manner, so that the grid frames 3 remain arranged in an equidistant manner when the telescopic frame 4 is telescoped.
[0039] As shown in Figure 1 , 4 , 5, the driving mechanism includes a motor 7 and a telescopic assembly; the telescopic assembly includes a rotating rod 61, a first gear 62, a second gear 63 and a guide rod 5; the rotating rod 61 and the guide rod 5 are arranged in parallel at the same end and are fixed to the side wall of the partition plate 2, the length direction of the rotating rod 61 and the guide rod 5 is consistent with the moving direction of the partition plate 2, and the other end of the rotating rod 61 and the guide rod 5 extends from the second cavity to the outside of the container 1 through the container 1.
[0040] The first gear 62 and the second gear 63 are meshed with each other and are rotatably installed on the inner side wall of the second cavity, the rotating rod 61 is provided with a thread 611, the rotating rod 61 and the first gear 62 are coaxially arranged, the rotating rod 61 passes through the coaxial first gear 62 relative to the thread, so that the first gear 62 is screw-connected with the thread 611 on the outer wall of the rotating rod 61.
[0041] The second gear 63 is coaxially provided with a insertion hole 631 (non-circular structure), the output end of the motor 7 is provided with a driving rod 71, the driving rod 71 is matched with the insertion hole 631; the motor 7 can be detachably installed on the outer side wall of the container 1 through a bolt assembly, and when the motor 7 is installed on the outer side wall of the container 1, the driving rod 71 is just inserted into the insertion hole 631.
[0042] The clamping block 64 is linearly slidably connected to the inner side wall of the second cavity of the container 1, and an elastic member 65 is connected between the clamping block 64 and the inner side wall of the second cavity, and the elastic force of the elastic member 65 pushes the clamping block 64 to tend to approach the second gear 63 and engage.
[0043] Working principle:
[0044] In normal state, the damping particles in the first cavity of the container 1 collide and rub with the obstacles, the damping particles and the inner wall of the first cavity, thereby consuming vibration energy and achieving the effect of vibration reduction.
[0045] When the power frequency of the transformer changes, the motor 7 can be controlled to drive the driving rod 71 to rotate, the driving rod 71 drives the second gear 63 to rotate, the second gear 63 drives the first gear 62 to rotate, and the first gear 62 rotates in place to drive the rotating rod 61 to move along the axis direction of the first gear 62, thereby driving the partition plate 2 to move inside the container 1, and adjusting the space of the first cavity filled with damping particles and obstacles. At this time, the clamping block 64 is far away from the second gear 63 due to the magnetic repulsion between the driving rod 71 and the clamping block 64.
[0046] The movement of the partition plate 2 drives the telescopic frame 4 to follow the telescopic movement, thereby adjusting the distance between the adjacent grid frames 3; thereby changing the parameters of the obstacles (including the space effect of the first cavity, the distance between the grid frames 3, and the filling rate of the damping particles, etc.), thereby affecting the final vibration reduction effect.
[0047] The distance that the partition plate 2 needs to move to maintain the optimal vibration reduction effect of the transformer under the power frequency can be simulated by the simulation technology in the early stage to obtain the parameters required by the particle damper under each power frequency, thereby constructing the relationship between the relative position of the partition plate 2 and the transformer under the corresponding power frequency.
[0048] It also includes a sensor (vibration sensor or magnetic sensor) for detecting the vibration of the transformer, and when the sensor detects the change of the vibration of the transformer, the power frequency changes, and the motor 7 can be controlled according to the program built in the processor, thereby realizing automatic control.
[0049] Usually, a large number of particle dampers are needed for a transformer, and if each particle damper is equipped with a motor 7, the cost will be large, therefore, the motor 7 is designed as a detachable structure, and one motor 7 can correspond to multiple particle dampers on one transformer; when the motor 7 is detached from the side wall of the container 1, the driving rod 71 is separated from the insertion hole 631 of the second gear 63, at this time, the clamping block 64 approaches the second gear 63 and remains engaged under the pushing of the elastic force of the elastic member 65, thereby preventing the rotation of the second gear 63 caused by the vibration of the transformer.
[0050] The part of the rotating rod 61 or the guide rod 5 that extends to the outside of the container 1 is marked with a scale, which can be used to determine the relative position of the partition 2 relative to the inner cavity of the container 1.
[0051] In another embodiment, instead of using the motor 7, a single drive rod 71 can be inserted directly into the socket 631 for manual adjustment.
[0052] Example 2
[0053] The difference lies in including all the contents of Embodiment 1, such as Figures 6-8 As shown, the adjustment component is a stud 8 set on the container 1. The stud 8 rotates relative to the container 1. The obstacle includes multiple grid frames 3 arranged at equal intervals. The nodes of two adjacent grid frames 3 are connected by telescopic rods 31, so the distance between two adjacent grid frames 3 can be adjusted.
[0054] The difference between container 1 and embodiment 1 is that there is only one cavity with a constant space, and the damping particles are placed in this cavity, such as... Figure 8 As shown, one of the inner sidewalls of container 1 is provided with a grid groove 11 that is adapted to the grid frame 3. The width of the grid groove 11 is slightly larger than the outer diameter of the grid frame 3 and the telescopic rod 31. Since the internal space of container 1 remains unchanged, when the distance between two adjacent grid frames 3 is large, the grid groove 11 is used to accommodate the excess grid frame 3 and telescopic rod 31.
[0055] The stud 8 can be adjusted manually or driven by a motor. The stud 8 is threadedly connected to multiple equally spaced parallel grid frame 3 nodes, and the module of the threaded connection between the stud 8 and each grid frame 3 is sequentially arithmetically equal, thus ensuring that the spacing remains constant when the stud 13 is rotated to adjust the spacing between adjacent grid frames 3. Figure 7 As shown, the stud 8 is located inside the multiple telescopic rods 31 on the same axis, thereby avoiding wear of the threads caused by the collision of damping particles with the stud 8.
[0056] Working principle:
[0057] When the operating conditions of a transformer change, the magnetic field around it will also change. By detecting the changes in the magnetic field using a magnetic sensor, signal data can be obtained through analysis.
[0058] Based on the pre-constructed mapping relationship between the magnetic field strength around the transformer and the area of the obstacle in the vibration direction, the motor is driven to rotate a set number of revolutions. The rotation of the motor drives the stud 8 to rotate, and the rotation of the stud 8 drives all the grid frames 3 to move and adjust the spacing between two adjacent grid frames 3, thereby adjusting the area of the obstacle in the vibration direction (the length direction of the container 1).
[0059] The above-described embodiments only express the specific implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application.
Claims
1. An adjustable granular damper comprising a container (1) and obstacles arranged in a three-dimensional network inside the container (1), characterized in that: It also includes an adjustment component for adjusting the size of the obstacle; The regulating component includes a partition (2), which divides the container (1) into a first chamber and a second chamber. The obstacle is placed in the first cavity, including a telescopic frame (4) and multiple sets of grid frames (3) arranged equidistantly in a straight line on the telescopic frame (4). The movable end of the telescopic frame (4) is connected to the partition (2). The driving mechanism is connected to the partition (2) and is used to drive the partition (2) to move in the container (1) to adjust the size of the first cavity.
2. A tunable granular damper according to claim 1, wherein, The drive mechanism includes a telescopic assembly (6); the telescopic assembly (6) includes a rotating rod (61), a first gear (62), and a second gear (63); one end of the rotating rod (61) is fixed on the partition (2), and the other end extends through to the outside of the container (1); the first gear (62) and the second gear (63) mesh with each other and rotate and are installed on the inner side wall of the second cavity; the first gear (62) and the rotating rod (61) are coaxially threaded and connected; and the second gear (63) is connected to an active rod (71).
3. An adjustable particle damper according to claim 2, wherein, The second gear (63) has a coaxial insertion hole (631) on it, and the drive rod (71) and the insertion hole (631) can be detachably inserted and connected.
4. An adjustable particle damper according to claim 2, wherein The active rod (71) is installed at the output end of the motor (7), and the motor (7) is detachably installed on the outer wall of the container (1).
5. An adjustable particle damper according to claim 3, characterized in that, The active rod (71) and the locking block (64) are magnetically repelled and engaged, and the locking block (64) is tended to be engaged with the locking block (64) by the elastic element (65).
6. An adjustable particle damper according to claim 3, characterized in that, The rotating rod (61) has a scale along its length at the part that extends through to the outside of the container (1).
7. An adjustable particle damper according to claim 1, characterized in that, The inner wall of the container (1) is provided with sound insulation cotton.
8. An adjustable particle damper, comprising a container (1) and an obstacle of a three-dimensional network structure disposed within the container (1), characterized in that: It also includes an adjustment component for adjusting the size of the obstacle; The obstacle includes multiple parallel grid frames (3) arranged at equal intervals, and adjacent nodes of the grid frames (3) are connected by telescopic rods (31); The adjustment assembly includes a stud (8) that rotates with the container (1) and is threadedly connected to each of the grid frames (3).
9. An adjustable particle damper according to claim 8, characterized in that, The telescopic rod (31) is hollow inside for the stud (8) to pass through; a grid groove (11) is provided on one inner side wall of the container (1), and the outline of the grid groove (11) is adapted to the outline of the grid frame (3).
10. An adjustable particle damper according to claim 8, characterized in that, The inner wall of the container (1) is provided with sound insulation cotton.