Noise reduction device for dynamic vibration absorber

Abstract

The utility model discloses a dynamic vibration absorber noise reduction device which comprises a base, fixing rods are symmetrically and fixedly connected to one side of the top of the base, sliding rings are connected to the outer sides of the fixing rods in a sliding mode, a vibration absorber body is connected to the outer sides of the fixing rods in a sliding mode, and springs are fixedly connected to the two sides of the vibration absorber body. The other end of one spring is fixedly connected to one side of the sliding ring, the two ends of one side of the top of the base are symmetrically and fixedly connected with fixing frames, one side of the top of one fixing frame is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a first threaded rod, and the outer side of the first threaded rod is in threaded connection with a first moving rod; one side of the first moving rod is fixedly connected to one side of the sliding ring, the first motor is arranged to drive the first threaded rod, the sliding ring and the vibration absorber body are driven to move along the fixed rod, the compression amount or the pre-tightening force of the spring is changed, the inherent frequency of the vibration absorber is adjusted, the inherent frequency is the same as the vibration frequency, and noise output is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of dynamic vibration absorber technology, specifically relating to a noise reduction device for a dynamic vibration absorber. Background Technology

[0002] Vibration and noise are common problems in industrial production and mechanical equipment operation. They not only affect the stability and service life of equipment, but may also harm the working environment and the health of operators. As an effective vibration control device, the dynamic vibration absorber absorbs and cancels the vibration energy of the main system through an additional mass-spring system, thereby reducing the vibration and noise level.

[0003] Traditional dynamic vibration absorbers are usually designed with fixed parameters, which makes it difficult to adapt to different operating conditions with varying frequencies or loads, resulting in limited vibration absorption performance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a noise reduction device for a dynamic vibration absorber, so as to solve the problem mentioned in the background art that traditional dynamic vibration absorbers are usually designed with fixed parameters, which makes it difficult to adapt to working conditions with different frequencies or load changes, resulting in limited vibration absorption effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a noise reduction device for a dynamic vibration absorber, comprising a base, a fixed rod symmetrically fixedly connected to one side of the top of the base, a sliding ring slidably connected to the outside of the fixed rod, a vibration absorber body slidably connected to the outside of the fixed rod, springs fixedly connected to both sides of the vibration absorber body, the other end of one spring fixedly connected to one side of the sliding ring, a fixed frame symmetrically fixedly connected to both ends of one side of the top of the base, a first motor fixedly connected to one side of the top of one fixed frame, a first threaded rod fixedly connected to the output end of the first motor, a first moving rod threadedly connected to the outside of the first threaded rod, and one side of the first moving rod fixedly connected to one side of the sliding ring.

[0006] Preferably, each of the four fixed frames is symmetrically fixedly connected to a mounting plate on one side, and the fixed frames are grouped in pairs. A second motor is fixedly connected to one side of each mounting plate, and a second threaded rod is fixedly connected to the output end of the second motor. A sound insulation plate is threadedly connected to the outer side of the second threaded rod.

[0007] Preferably, support feet are fixedly connected to all four corners of one side of the bottom of the base.

[0008] Preferably, a first sliding rod is fixedly connected between the two sides inside the fixed frame, and a second moving rod is slidably connected to the outside of the first sliding rod, with one side of the second moving rod fixedly connected to one side of the sliding ring.

[0009] Preferably, a second sliding rod is fixedly connected between one side of the two mounting plates, and the other end of the sound insulation plate is slidably connected to the outside of the second sliding rod.

[0010] Preferably, the first threaded rod is rotatably connected between the two sides inside the fixed frame.

[0011] Preferably, the fixing rod is located inside the spring, and the other end of the spring is fixedly connected to one side of the top of the base.

[0012] Preferably, the second threaded rod is rotatably connected between one side of the two mounting plates.

[0013] Compared with the prior art, this utility model provides a noise reduction device for a dynamic vibration absorber, which has the following beneficial effects:

[0014] 1. This utility model sets up a first motor to drive a first threaded rod, which drives the sliding ring and the vibration absorber body to move along the fixed rod, thereby changing the compression or preload of the spring, adjusting the natural frequency of the vibration absorber to be the same as the vibration frequency, and reducing noise output.

[0015] 2. This utility model sets up a sound insulation board and adjusts the position of the sound insulation board by driving the second threaded rod with a second motor to form a physical sound insulation barrier, effectively blocking the propagation path of noise. This dual noise reduction method, which combines vibration absorption and sound insulation, not only reduces vibration transmission but also further reduces air noise. It is suitable for industrial scenarios with high requirements for acoustic environment and significantly improves the overall noise reduction performance.

[0016] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a scientific and reasonable structure, is safe and convenient to use, and provides great help to people. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the main body of a dynamic vibration absorber noise reduction device proposed in this utility model;

[0019] Figure 2 This is a side view of the structure of a dynamic vibration absorber noise reduction device proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the noise reduction device for a dynamic vibration absorber after the sound insulation plate has been moved, as proposed in this utility model.

[0021] Figure 4 This utility model proposes a noise reduction device for a dynamic vibration absorber. Figure 2 Enlarged structural diagram at point A;

[0022] In the diagram: 1. Base; 2. Fixing rod; 3. Sliding ring; 4. Vibration absorber body; 5. Spring; 6. Fixing frame; 7. First motor; 8. First threaded rod; 9. First moving rod; 10. Mounting plate; 11. Second motor; 12. Second threaded rod; 13. Sound insulation plate; 14. Support foot; 15. First sliding rod; 16. Second moving rod; 17. Second sliding rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a noise reduction device for a dynamic vibration absorber, comprising a base 1, a fixing rod 2 symmetrically fixedly connected to one side of the top of the base 1, a sliding ring 3 slidably connected to the outside of the fixing rod 2, a vibration absorber body 4 slidably connected to the outside of the fixing rod 2, springs 5 ​​fixedly connected to both sides of the vibration absorber body 4, the other end of one spring 5 fixedly connected to one side of the sliding ring 3, a fixing frame 6 symmetrically fixedly connected to both ends of one side of the top of the base 1, a first motor 7 fixedly connected to one side of the top of one fixing frame 6, a first threaded rod 8 fixedly connected to the output end of the first motor 7, and the first threaded rod 8 being threadedly connected to the outside of the first threaded rod 8. There is a first moving rod 9, one side of which is fixedly connected to the side of the sliding ring 3. The sliding ring 3 and the vibration absorber body 4 are installed on the fixed rod 2 at the top of the base 1. The vibration absorber body 4 is connected to the sliding ring 3 and the base 1 through springs 5 ​​on both sides. When the first motor 7 is started, it drives the first threaded rod 8 to rotate, causing the threaded first moving rod 9 to move horizontally, thereby pushing the sliding ring 3 to slide along the fixed rod 2. The displacement of the sliding ring 3 will change the compression or preload of the spring 5, thereby adjusting the natural frequency of the vibration absorber body 4 to match the frequency of the external vibration source, improving the vibration absorption effect, and reducing the noise output at the same time.

[0025] In this invention, preferably, each of the four fixed frames 6 has a mounting plate 10 symmetrically fixedly connected to one side. Two fixed frames 6 form a group, and a second motor 11 is fixedly connected to one side of each mounting plate 10. A second threaded rod 12 is fixedly connected to the output end of the second motor 11, and a sound insulation plate 13 is threadedly connected to the outer side of the second threaded rod 12. The second motor 11 is mounted on the mounting plate 10 on the side of the fixed frame 6. The second motor 11 drives the second threaded rod 12 to rotate, causing the threaded sound insulation plate 13 to move along the second sliding rod 17. By adjusting the position of the sound insulation plate 13, a physical sound barrier can be formed along the vibration transmission path, blocking noise transmission and reducing airborne noise radiation.

[0026] In this utility model, preferably, support feet 14 are fixedly connected to the four corners of one side of the bottom of the base 1, and a first sliding rod 15 is fixedly connected between the two sides inside a fixed frame 6. A second moving rod 16 is slidably connected to the outside of the first sliding rod 15. One side of the second moving rod 16 is fixedly connected to one side of the sliding ring 3. When the first moving rod 9 pushes the sliding ring 3, the second moving rod 16 moves accordingly, which enhances the stability of the sliding ring 3, prevents it from tilting during the adjustment process, and ensures that the vibration absorber body 4 always maintains linear motion.

[0027] In this utility model, preferably, a second sliding rod 17 is fixedly connected between one side of the two mounting plates 10, and the other end of the sound insulation plate 13 is slidably connected to the outside of the second sliding rod 17. The second sliding rod 17 plays a guiding role, so that the sound insulation plate 13 remains stable during movement, avoiding jamming or tilting, ensuring that the sound insulation plate 13 can be accurately adjusted in position, and effectively blocking the transmission of noise. The first threaded rod 8 is rotatably connected between the two sides inside a fixed frame 6, the fixed rod 2 is located inside the spring 5, the other end of a spring 5 is fixedly connected to one side of the top of the base 1, and the second threaded rod 12 is rotatably connected between one side of the two mounting plates 10.

[0028] The working principle and usage process of this utility model are as follows: When the first motor 7 starts, it drives the first threaded rod 8 to rotate, causing the threaded first moving rod 9 to move horizontally. This pushes the sliding ring 3 to slide along the fixed rod 2. The displacement of the sliding ring 3 changes the compression or preload of the spring 5, thereby adjusting the natural frequency of the vibration absorber body 4 to match the frequency of the external vibration source, improving the vibration absorption effect and reducing noise output. The second motor 11 drives the second threaded rod 12 to rotate, causing the threaded sound insulation plate 13 to move along the second sliding rod 17. By adjusting the position of the sound insulation plate 13, a physical sound barrier can be formed along the vibration transmission path, blocking noise propagation and reducing airborne noise radiation.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for reducing noise by means of a dynamic absorber, comprising a base (1), characterised in that: The bottom (1) top side symmetrical fixed connection has fixed rod (2), the fixed rod (2) outside sliding connection has sliding ring (3), the fixed rod (2) outside sliding connection has vibration absorber body (4), the vibration absorber body (4) both sides are fixedly connected with spring (5), one spring (5) the other end is fixedly connected to sliding ring (3) one side, the bottom (1) top side both ends are fixedly connected with fixed frame (6), one fixed frame (6) top side fixedly connected with first motor (7), the output of first motor (7) is fixedly connected with first threaded rod (8), the first threaded rod (8) outside thread connection has first moving rod (9), one side of first moving rod (9) is fixedly connected to one side of sliding ring (3).

2. A device according to claim 1, wherein: Four fixed frame (6) one side are fixedly connected with mounting plate (10), two fixed frame (6) are a group, one mounting plate (10) one side is fixedly connected with second motor (11), the output of second motor (11) is fixedly connected with second threaded rod (12), the second threaded rod (12) outside thread connection has soundproof board (13).

3. The power absorber noise reduction device of claim 1, wherein: The bottom (1) bottom side four corners are fixedly connected with support leg (14).

4. The power absorber noise reduction device of claim 1, wherein: One fixed frame (6) inside both sides are fixedly connected with first sliding rod (15), the first sliding rod (15) outside sliding connection has second moving rod (16), one side of second moving rod (16) is fixedly connected to one side of sliding ring (3).

5. The power absorber noise reduction device of claim 2, wherein: Two mounting plate (10) one side is fixedly connected with second sliding rod (17), the other end of soundproof board (13) is slidingly connected to the outside of second sliding rod (17).

6. The power absorber noise reduction device of claim 1, wherein: The first threaded rod (8) is rotatably connected between the two sides of one fixed frame (6).

7. The power absorber noise reduction device of claim 1, wherein: The fixed rod (2) is located in the spring (5), and the other end of the spring (5) is fixedly connected to the top side of the bottom (1).

8. The power absorber noise reduction device of claim 2, wherein: The second threaded rod (12) is rotatably connected between the two mounting plates (10).

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