A cavity type low frequency wide band damping and noise reduction filler for pipe type power devices

Abstract

The application discloses a cavity type low-frequency wide-band damping and noise reduction filler for a pipe type power device, which comprises a rubber filler, a plurality of noise reduction holes are formed in one side of the rubber filler, and the other side of the rubber filler is designed in a conformal mode and is matched with the inner wall of the pipe type power device. The application has the advantage of convenient use, solves the problems that the existing noise reduction filler has poor medium and low frequency damping and noise reduction characteristics in use, increases the propagation of noise, and is difficult to be installed on the arc-shaped inner wall of the pipe type power device and is prone to cause adhesion failure.

Description

Technical Field

[0001] This invention relates to the field of acoustic materials technology, specifically to a cavity-type low-frequency broadband vibration damping and noise reduction filler for tubular power units. Background Technology

[0002] Tubular underwater propulsion systems typically refer to power systems designed with a tubular structure. This design is commonly found in underwater propulsion equipment such as submarines, underwater drones, or certain types of underwater thrusters. This tubular design optimizes water resistance, improves propulsion efficiency, and protects internal mechanical components from damage. Tubular propulsion systems are often filled with noise-reducing materials because noise is a significant factor in the underwater environment. Sound travels very far in water and can be detected by sensitive aquatic life or underwater sonar systems. For submarines used for military purposes, reducing noise enhances their stealth capabilities, making them more difficult to detect. For civilian equipment, reducing noise minimizes the impact on marine life and improves the equipment's acoustic detection capabilities.

[0003] Existing noise-reducing fillers have poor vibration and noise reduction characteristics in the low and medium frequencies during use, which increases the transmission of noise. Moreover, they are difficult to install on the curved inner wall of tubular power devices, which can easily cause adhesion and failure. Summary of the Invention

[0004] The purpose of this invention is to provide a cavity-type low-frequency broadband vibration damping and noise reduction filler for tubular power units, which has the advantage of being easy to use. It solves the problems of existing noise reduction fillers having poor vibration damping and noise reduction characteristics in the mid and low frequencies, which increases the propagation of noise, and being difficult to install on the arc-shaped inner wall of tubular power units, which easily leads to adhesion and failure.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cavity-type low-frequency broadband vibration reduction and noise reduction filler for a tubular power device, comprising a rubber filler, wherein a plurality of noise reduction holes are provided on one side of the rubber filler, and the other side of the rubber filler is conformally designed to fit the inner wall of the tubular power device.

[0006] As a preferred embodiment of the hollow low-frequency broadband vibration reduction and noise reduction filler for tubular power devices according to the present invention, a mesh cloth is fixedly connected to the other side of the rubber filler.

[0007] As a preferred embodiment of the hollow low-frequency broadband vibration damping and noise reduction filler for a tubular power device according to the present invention, an adhesive is fixedly connected to the rubber filler and the mesh cloth, and the adhesive is fixedly connected to the inner wall of the tubular power device.

[0008] As a preferred embodiment of the hollow low-frequency broadband vibration reduction and noise reduction filler for tubular power devices of the present invention, the rubber filler is fixedly connected to elastic elements on both the left and right sides, and a seat is fixedly connected to one side of the elastic element.

[0009] As a preferred embodiment of the hollow low-frequency broadband vibration reduction and noise reduction filler for a tubular power device according to the present invention, a rotating rod is rotatably connected to the base, one end of the rotating rod is provided with a rotating head, the front end of the rotating head is rotatably connected to a first connecting seat, and the rear end of the rotating head is movably connected to an airbag.

[0010] As a preferred embodiment of the hollow low-frequency broadband vibration reduction and noise reduction filler for a tubular power device according to the present invention, a spring is fixedly connected to one end of the first connecting seat, a second connecting seat is fixedly connected to one end of the spring, and the second connecting seat is rotatably connected to one side of the elastic element.

[0011] As a preferred embodiment of the hollow low-frequency broadband vibration damping and noise reduction filler for the tubular power device of the present invention, a reinforcing plate is fixedly connected to the rear side of the airbag, the reinforcing plate is fixedly connected to the seat body, and a sealing element is fixedly connected to the rear side of the elastic element, the seat body and the reinforcing plate, and the sealing element is fixedly installed on the inner wall of the tubular power device.

[0012] As a preferred embodiment of the hollow low-frequency broadband vibration reduction and noise reduction filler for a tubular power device according to the present invention, a reinforcing bolt is provided through the reinforcing plate and the sealing element, and the reinforcing bolt is threadedly connected to the tubular power device.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. The present invention can serve as a resonant cavity for sound waves by setting several noise reduction holes. When sound waves enter these holes, a resonance effect will be generated in the holes, consuming sound wave energy and thus reducing noise transmission. The other side of the rubber filler is a conformal design, that is, its shape matches the inner wall of the tubular power device, which can fit tightly against the inner wall, reduce sound wave reflection, and improve the noise reduction effect.

[0015] 2. This invention, by incorporating an elastic element, can absorb the deformation of the rubber filler caused by thermal expansion and contraction, maintaining close contact between the filler and the pipe wall. A seat is fixedly connected to one side of the elastic element to support and fix the entire filler system. The rotating rod is rotatably connected to the seat to adapt to dimensional changes caused by thermal expansion and contraction. The front end of the rotating head is rotatably connected to the first connecting seat, and the rear end is movably connected to the airbag, providing adjustment and buffering functions. The spring provides additional buffering, reducing stress caused by thermal expansion and contraction, ensuring stable contact between the filler and the pipe wall. The airbag provides an additional buffer layer between the filler and the pipe wall. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the installation state of the present invention;

[0019] Figure 4 For the present invention Figure 3 A magnified view of A in the middle.

[0020] In the diagram: 1. Rubber filler; 2. Noise reduction hole; 3. Mesh cloth; 4. Adhesive; 5. Tubular power unit; 6. Elastic element; 7. Seat; 8. Rotating rod; 9. Airbag; 10. Seal; 11. Reinforcing bolt; 12. Reinforcing plate; 13. Rotating head; 14. First connecting seat; 15. Spring; 16. Second connecting seat. Detailed Implementation

[0021] Please see Figures 1-4 A cavity-type low-frequency broadband vibration reduction and noise reduction filler for a tubular power device includes a rubber filler 1. A plurality of noise reduction holes 2 are opened on one side of the rubber filler 1, and the other side of the rubber filler 1 is conformally designed to fit the inner wall of the tubular power device 5.

[0022] Several noise reduction holes 2 can serve as resonant cavities for sound waves. When sound waves enter these holes, a resonance effect is generated inside the holes, consuming sound wave energy and thus reducing noise transmission.

[0023] The other side of the rubber filler 1 is a conformal design, that is, its shape matches the inner wall of the tubular power unit 5, which can fit tightly against the inner wall, reduce sound wave reflection, and improve the noise reduction effect.

[0024] Moreover, the conformal design can maintain good contact between the inner wall of the rubber filler 1 and the tubular power unit 5, preventing adhesion failure of the contact surface.

[0025] Furthermore, a mesh cloth 3 is fixedly connected to the other side of the rubber filler 1, and an adhesive 4 is fixedly connected to the rubber filler 1 and the mesh cloth 3. The adhesive 4 is fixedly connected to the inner wall of the tubular power device 5.

[0026] The mesh fabric 3 can improve the structural strength and stability of the filler, and the adhesive 4 is used to fix the rubber filler 1 to the inner wall of the tubular power unit 5, ensuring that the filler will not detach from the inner wall and maintain its stability and noise reduction effect.

[0027] Furthermore, elastic elements 6 are fixedly connected to both sides of the rubber filler 1, and a seat 7 is fixedly connected to one side of the elastic element 6.

[0028] Furthermore, a rotating rod 8 is rotatably connected to the seat 7, and a rotating head 13 is provided at one end of the rotating rod 8. A first connecting seat 14 is rotatably connected to the front end of the rotating head 13, and an airbag 9 is movably connected to the rear end of the rotating head 13.

[0029] Furthermore, a spring 15 is fixedly connected to one end of the first connecting seat 14, and a second connecting seat 16 is fixedly connected to one end of the spring 15. The second connecting seat 16 is rotatably connected to one side of the elastic member 6.

[0030] Furthermore, a reinforcing plate 12 is fixedly connected to the rear side of the airbag 9. The reinforcing plate 12 is fixedly connected to the seat body 7. A sealing element 10 is fixedly connected to the rear side of the elastic element 6, the seat body 7 and the reinforcing plate 12. The sealing element 10 is fixedly installed on the inner wall of the tubular power unit 5.

[0031] Furthermore, reinforcing bolts 11 are provided through the reinforcing plate 12 and the sealing element 10, and the reinforcing bolts 11 are threadedly connected to the tubular power unit 5.

[0032] Elastic elements 6 are fixedly connected to both sides of the rubber packing 1. These elastic elements 6 can absorb the deformation of the rubber packing 1 caused by thermal expansion and contraction, maintaining tight contact between the packing and the pipe wall. A seat 7 is fixedly connected to one side of the elastic element 6 to support and fix the entire packing system. The rotating rod 8 is rotatably connected to the seat 7 to adapt to dimensional changes caused by thermal expansion and contraction. The front end of the rotating head 13 is rotatably connected to the first connecting seat 14, and the rear end is movably connected to the air bladder 9, providing adjustment and buffering functions. The spring 15 provides additional buffering to reduce stress caused by thermal expansion and contraction and ensure the packing... The contact between the material and the pipe wall is stable. The airbag 9 can provide an additional buffer layer between the filler and the pipe wall to adapt to the thermal expansion and contraction of the rubber filler 1, reduce the direct contact between the filler and the pipe wall, and further reduce vibration transmission. The reinforcing plate 12 can enhance the stability of the overall structure and prevent structural loosening caused by thermal expansion and contraction. The seal 10 can provide additional sealing function to prevent liquid or gas leakage and ensure sealing. The reinforcing bolt 11 can fix the reinforcing plate 12 and the seal 10 to the inner wall of the tubular power unit 5 to ensure the stability of the entire system and maintain a good fixing effect.

[0033] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cavity-type low-frequency broadband vibration damping and noise reduction filler for a tubular power unit, comprising rubber filler (1), characterized in that: The rubber filler (1) has several noise reduction holes (2) on one side, and the other side of the rubber filler (1) is a conformal design that is compatible with the inner wall of the tubular power device (5). The rubber filler (1) is fixedly connected to elastic elements (6) on both the left and right sides, and a seat (7) is fixedly connected to one side of the elastic element (6); A rotating rod (8) is rotatably connected to the seat (7). One end of the rotating rod (8) is provided with a rotating head (13). The front end of the rotating head (13) is rotatably connected to a first connecting seat (14), and the rear end of the rotating head (13) is movably connected to an airbag (9). A spring (15) is fixedly connected to one end of the first connecting seat (14), and a second connecting seat (16) is fixedly connected to one end of the spring (15). The second connecting seat (16) is rotatably connected to one side of the elastic member (6). A reinforcing plate (12) is fixedly connected to the rear side of the airbag (9), and the reinforcing plate (12) is fixedly connected to the seat (7). A sealing member (10) is fixedly connected to the rear side of the elastic member (6), the seat (7) and the reinforcing plate (12), and the sealing member (10) is fixedly installed on the inner wall of the tubular power device (5). Reinforcing bolts (11) are provided through the reinforcing plate (12) and the sealing element (10), and the reinforcing bolts (11) are threadedly connected to the tubular power device (5).

2. The cavity-type low-frequency broadband vibration damping and noise reduction filler for a tubular power unit according to claim 1, characterized in that: A mesh cloth (3) is fixedly connected to the other side of the rubber filler (1).

3. The cavity-type low-frequency broadband vibration damping and noise reduction filler for a tubular power unit according to claim 1, characterized in that: An adhesive (4) is fixedly connected to the rubber filler (1) and the mesh cloth (3), and the adhesive (4) is fixedly connected to the inner wall of the tubular power device (5).

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