Noise-absorbing structural air duct based on the ribs inside the underwater submersible

Abstract

The present invention proposes a sound-absorbing structural air duct based on the internal ribs of an underwater submersible, comprising a structural air duct body and a sound-absorbing mechanism installed inside the structural air duct body. A plurality of T-shaped internal ribs are fixed to the inner side wall of the structural air duct body, the webs of the T-shaped internal ribs are fixedly connected to the inner side wall of the structural air duct body, the wing plates of the T-shaped internal ribs are arranged parallel to the inner side wall of the structural air duct body, the sound-absorbing mechanism comprises a side wall plate fixed to the wing plate, a bottom plate connecting the side wall plates of two adjacent T-shaped internal ribs, the side wall plate, the bottom plate and the two adjacent T-shaped internal ribs forming a hollow annular sound-absorbing chamber, a sound-absorbing and insulating structure is installed on the inner side wall of the sound-absorbing chamber, and an air inlet and an air outlet are provided on the bottom plate or the side wall plate. This sound-absorbing structural air duct forms a compact structural air duct by conforming the sound-absorbing structure to the hull structure, thereby realizing the reuse of abandoned space and suppressing circulating air noise.

Description

Technical Field

[0001] The present invention relates to the technical field of submersible auxiliary structures, and in particular to a sound-absorbing structural air duct based on ribs inside an underwater submersible. Background Art

[0002] Submersibles at home and abroad are all underwater operation platforms. A common feature of underwater operation platforms is that they need to withstand huge seawater pressure, and the greater the diving depth, the greater the pressure, so the internal space is usually relatively small. In order to accommodate the needs of detection, maneuvering, excavation, personnel activities and other complex functions, the main structure of underwater submersibles often adopts a cylindrical shell + annular ribs (see Figure 1 ) to strengthen the structure, thereby isolating and resisting the water pressure from the deep sea, ensuring the safety and integrity of the submersible. However, the annular ribs arranged along the axial direction of the submersible compress the effective space within the submersible. The protruding internal ribs have limited "layer height" and "clear width", making it impossible to accommodate even slightly larger equipment or equipment. This creates a large amount of unusable abandoned area, wasting extremely valuable space resources.

[0003] Furthermore, as a core system for ensuring the temperature and humidity required for personnel comfort and reliable equipment operation, the ventilation and air-conditioning system is a key system for underwater submersibles. However, due to the closed internal compartments, the complex hydrological environments in different sea areas, the numerous heating devices within the cabins, and the diverse needs of personnel, especially with the transition from small to large-scale and from conventional energy to nuclear energy, ventilation and air-conditioning systems often experience high loads, large air volumes, and high noise levels, making it difficult to create a comfortable, low-noise environment for personnel. To control air noise and pipeline vibration, slowing the air flow rate within the pipes is an effective method. However, this results in a large area of ​​ductwork and a complex pipe network, placing a heavy burden on the underwater submersible and squeezing out space for other equipment and personnel, resulting in congestion and difficulty in equipment maintenance.

[0004] Therefore, achieving quiet ventilation and air conditioning and ensuring personnel comfort while fully improving space utilization, providing more comfortable space for personnel and providing more space for equipment maintenance are key issues that need to be urgently addressed. Summary of the Invention

[0005] The main purpose of the present invention is to provide a sound-absorbing structural air duct based on the ribs inside an underwater submersible, aiming to improve space utilization, suppress circulating air noise, and achieve quiet ventilation and air conditioning.

[0006] To achieve the above-mentioned purpose, the present invention provides a sound-absorbing structural air duct based on the ribs inside an underwater submersible, comprising a structural air duct body and a sound-absorbing mechanism installed inside the structural air duct body, wherein:

[0007] A plurality of T-shaped inner ribs are fixed on the inner wall of the structural air duct body, the web of the T-shaped inner ribs is fixedly connected to the inner wall of the structural air duct body, the wing plates of the T-shaped inner ribs are arranged parallel to the inner wall of the structural air duct body, and the silencer mechanism includes a side wall plate fixed on the wing plate, a bottom plate connecting the side wall plates of two adjacent T-shaped inner ribs, the side wall plate, the bottom plate and the two adjacent T-shaped inner ribs form a hollow annular silencer cavity, a sound insulation structure is installed on the inner wall of the silencer cavity, and an air inlet and an air outlet are provided on the bottom plate or the side wall plate.

[0008] Preferably, the side wall panels and the bottom panel are detachably connected via fasteners, and a sealing member is installed between the sealing surfaces of the side wall panels and the bottom panel.

[0009] Preferably, the base plate includes a sleeve and annular bosses located on both sides of the sleeve, the bosses are located on the outside of the side wall plate, and both the bosses and the side wall plate are provided with mounting holes for fasteners to pass through, and a seal is installed between the bosses and the side wall plate.

[0010] Preferably, the sealing member comprises a rubber strip installed between the boss and the side wall plate, and a plurality of fasteners are evenly arranged in the circumferential direction of the boss.

[0011] Preferably, a sealing groove is provided on the contacting surface of the boss and the side wall plate, and the sealing groove is used in conjunction with a sealing member.

[0012] Preferably, the bottom plate adopts a multi-section splicing structure, the splicing parts of the bottom plate adopt a staggered stepped structure, fixed by rivets, and the gaps are sealed by rubber strips.

[0013] Preferably, the sound insulation structure includes a sound absorbing and insulating material pad and a porous plate attached to the outside of the sound absorbing and insulating material pad and completely wrapping the outside of the sound absorbing and insulating material pad. The sound absorbing and insulating material pad is attached to the inner wall of the T-shaped inner rib and the structural air duct body through an adhesive.

[0014] Preferably, the thickness of the sound-absorbing and insulating material pad is not less than 30 mm.

[0015] Preferably, the sound-absorbing and insulating material pad is made of glass wool or polyimide, the porous plate is made of stainless steel, and the porosity of the porous plate is 10% to 30%.

[0016] Preferably, the sound-absorbing structural air duct based on the ribs inside the underwater submersible further includes a layer of thermal insulation material adhered to the outside of the side wall panels and the bottom plate.

[0017] The sound-absorbing structure air duct based on the ribs inside the underwater submersible proposed by the present invention has the following beneficial effects:

[0018] (1) By integrating the traditional air duct with the inner rib to form a structural air duct and then combining it with a silencer mechanism, the space utilization rate can be greatly improved, which can save space for underwater submersibles whose internal space is already very limited;

[0019] (2) Abandoning the welding method, the bottom plate and the side wall plate are detachably connected, making it easy to disassemble and maintain;

[0020] (3) Combined with porous panels and sound insulation technology, it effectively suppresses air circulation noise and effectively reduces vibration noise transmission;

[0021] (4) Flexible and diverse air inlet and outlet types facilitate connection with external air ducts.

[0022] (5) The air duct of this silencer structure has the advantages of simple structure, stable and reliable operation and good silencer effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the air duct of the sound-absorbing structure based on the ribs inside the underwater submersible according to the present invention after partial disassembly;

[0024] Figure 2 This is a schematic cross-sectional view of the air duct of the sound-absorbing structure based on the ribs inside the underwater submersible according to the present invention;

[0025] Figure 3 This is a partial cross-sectional structural diagram of the sound-absorbing structure air duct based on the ribs inside the underwater submersible according to the present invention;

[0026] Figure 4 This is a schematic diagram of the sealing substructure of the air duct of the sound-absorbing structure based on the ribs inside the underwater submersible according to the present invention;

[0027] Figure 5 This is a schematic structural diagram of the bottom plate splicing in the air duct of the sound-absorbing structure based on the ribs inside the underwater submersible according to the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the sound-absorbing material in the air duct of the sound-absorbing structure based on the ribs inside the underwater submersible according to the present invention;

[0029] Figure 7 This is a schematic diagram of the working principle of the sound-absorbing material in the air duct of the sound-absorbing structure based on the ribs inside the underwater submersible of the present invention;

[0030] Figure 8 This is a schematic diagram of the air inlet and outlet structure of the sound-absorbing structure air duct based on the ribs inside the underwater submersible according to the present invention.

[0031] In the figure, 1-structural duct body, 2-side wall plate, 3-bottom plate, 4-insulation material layer, 5-porous plate, 6-sound-absorbing and insulating material pad, 7-rubber strip, 8-fastener, 9-rivet, 10-T-shaped inner rib.

[0032] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0033] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] It should be noted that in the description of the present invention, the terms "transverse," "longitudinal," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Reference Figures 1 to 3 In this preferred embodiment, a sound-absorbing structural air duct based on the ribs inside an underwater submersible comprises a structural air duct body 1 (combined with a pressure-resistant hull to form a cavity structure of the structural air duct body 1) and a sound-absorbing mechanism installed inside the structural air duct body 1, wherein:

[0036] A plurality of T-shaped inner ribs 10 are fixed on the inner wall of the structural duct body 1, the web of the T-shaped inner rib 10 is fixedly connected to the inner wall of the structural duct body 1, and the wing plate of the T-shaped inner rib 10 is arranged parallel to the inner wall of the structural duct body 1. The silencer mechanism includes a side wall plate 2 fixed on the wing plate, a bottom plate 3 connecting the side wall plates 2 of two adjacent T-shaped inner ribs 10, a porous plate 5 and a sound-absorbing and insulating material pad 6. The side wall plate 2, the bottom plate 3 and the two adjacent T-shaped inner ribs 10 form a hollow annular silencer cavity. A sound insulation structure is installed on the inner wall of the silencer cavity, and an air inlet and an air outlet are provided on the bottom plate 3 or the side wall plate 2 (to facilitate connection with an external air duct).

[0037] Specifically, refer to Figure 8 , air inlet and outlet can be opened on the bottom plate 3, and air inlet and outlet can be set on the side wall plate 2. The inner wall is fixed to the wing plate of the T-shaped inner rib 10 by welding.

[0038] The overall protruding height of the sound-absorbing structure air duct is small, and the internal cavity space of the T-shaped inner rib 10 is fully utilized to form an air circulation channel, meeting the requirements of controlling the air flow rate and reducing the occupied space. The T-shaped inner rib 10 is arranged in a ring shape on the structure air duct body 1.

[0039] Further, refer to Figure 3 and Figure 4The side panels 2 and bottom panel 3 are detachably connected via fasteners 8, with seals installed between their sealing surfaces. The bottom panel 3 is detachably mounted, facilitating subsequent repair and maintenance. Seals installed between the sealing surfaces of the side panels 2 and bottom panel 3 effectively prevent air leakage through the gap.

[0040] Specifically, in this embodiment, referring to Figure 3 The bottom plate 3 includes a sleeve and annular bosses on both sides of the sleeve. The bosses are located on the outside of the side wall plate 2. Both the bosses and the side wall plate 2 are provided with mounting holes for fasteners 8 to pass through. A seal is installed between the bosses and the side wall plate 2.

[0041] Specifically, in this embodiment, referring to Figure 4 The sealing member includes a rubber strip 7 installed between the boss and the side wall plate 2 to form a sealing auxiliary structure. A plurality of fasteners 8 are evenly arranged in the circumferential direction of the boss. The spacing between two adjacent fasteners 8 is generally not greater than 60mm to 100mm.

[0042] Further, refer to Figure 4 The contacting surfaces of the boss and the sidewall plate 2 are both provided with sealing grooves, which are used in conjunction with the sealing member. Specifically, the width of the sealing groove is 1 mm to 1.5 mm. The number of sealing grooves can be 3 to 4.

[0043] In order to solve the problem that the bottom plate 3 is too long and causes installation difficulties, Figure 5 As shown, the bottom plate 3 adopts a multi-section splicing structure, and the splicing parts of the bottom plate 3 adopt a staggered step structure, which is fixed by rivets 9, and the gaps are sealed by rubber strips 7.

[0044] In this embodiment, refer to Figure 6 and Figure 7 The sound insulation structure includes a sound absorbing and insulating material pad 6 and a porous plate 5 attached to the outside of the sound absorbing and insulating material pad 6 and completely wrapping the outside of the sound absorbing and insulating material pad 6. The sound absorbing and insulating material pad 6 is attached to the inner wall of the T-shaped inner rib 10 and the structural duct body 1 through an adhesive.

[0045] The thickness of the sound-absorbing and insulating material pad 6 is not less than 30 mm to ensure good sound insulation effect. In this embodiment, the sound-absorbing and insulating material pad 6 is made of glass wool or polyimide, and the porous plate 5 is made of stainless steel. The porosity of the porous plate 5 is 10% to 30%.

[0046] There are two main sources of air vibration noise in the air duct: one is the mechanical noise and pressure pulsation generated by the rotation of the fan motor and impeller, which is transmitted upstream and downstream by the air in the duct; the other is the sudden changes in cross-section structure such as bends, reducers and tees in the air duct, which cause fluid-solid coupling excitation due to the drastic changes in wind speed and direction, generating secondary vibration noise. To this end, a composite sound-absorbing and sound-isolating structure of sound-absorbing and sound-isolating material pads 6 and porous plates 5 is laid on the surface of the inner ribs (see Figure 6 and Figure 7 The sound-absorbing and insulating structure conforms to the structural air duct and is affixed to the inner ribs and sidewall panels 2 of the pressure hull using adhesive. Furthermore, the porous plate 5, affixed to the surface of the sound-absorbing and insulating material pad 6, also serves as a protective layer to prevent dust from being directly eroded by air over time. Airborne sound energy enters the sound-absorbing and insulating material pad 6 through its numerous pores, where it is continuously attenuated through refraction and absorption.

[0047] Furthermore, the duct structure based on the ribs of the underwater submersible includes a thermal insulation layer 4 adhered to the exterior of the sidewall panels 2 and bottom panel 3. This layer is adhered to the exterior of the sidewall panels 2 and bottom panel 3 using an adhesive to isolate the cold air inside the duct from the hot and humid air outside, preventing condensation on the duct's exterior surface. The thermal insulation layer 4 has holes at the air inlet and outlet.

[0048] The side wall plate 2, bottom plate 3 and porous plate 5 together form the internal cavity of the structural air duct, which serves as a channel for air circulation. The structural air duct can be set with flexible and diverse air inlet and outlet types (see Figure 7 ), after the external air enters the structural air duct through the air inlet, it flows along the annular air duct to the target position while suppressing air noise, and is finally sent to the external cabin from the air outlet.

[0049] The flow cross-section of the internal cavity of the structural air duct formed by the side wall plate 2, the bottom plate 3 and the porous plate 5 should be optimized to prevent problems such as high wind resistance, high noise and large air pressure pulsation caused by excessive flow rate. On the other hand, it is also necessary to consider the problem of excessive duct size caused by too low flow rate. The flow cross-section of the air duct is designed according to the following formula:

[0050] ;

[0051] Where: F is the net flow cross section of the internal cavity, unit: m 2 Q is the air flow rate in the pipe, unit is m 3 / h; V is the air velocity, unit is m / s.

[0052] Table 1 Recommended wind speed

[0053]

[0054] The sound-absorbing structure air duct based on the ribs inside the underwater submersible proposed in this embodiment has the following beneficial effects:

[0055] (1) By integrating the traditional air duct with the inner rib to form a structural air duct and then combining it with a silencer mechanism, the space utilization rate can be greatly improved, which can save space for underwater submersibles whose internal space is already very limited;

[0056] (2) Abandoning the welding method, the bottom plate 3 and the side wall plate 2 are detachably connected, thereby facilitating disassembly and maintenance;

[0057] (3) Combined with the porous plate 5 and sound insulation technology, it effectively suppresses air circulation noise and effectively reduces vibration noise transmission;

[0058] (4) Flexible and diverse air inlet and outlet types facilitate connection with external air ducts.

[0059] (5) The air duct of this silencer structure has the advantages of simple structure, stable and reliable operation and good silencer effect.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sound-absorbing structure air duct based on the ribs inside an underwater submersible, characterized in that: It includes a structural air duct body and a silencer mechanism installed inside the structural air duct body, wherein: A plurality of T-shaped inner ribs are fixed on the inner wall of the structural air duct body, the web of the T-shaped inner ribs is fixedly connected to the inner wall of the structural air duct body, the inner wall of the wing plate structural air duct body of the T-shaped inner ribs is arranged in parallel, and the silencer mechanism includes a side wall plate fixed on the wing plate, a bottom plate connecting the side wall plates of two adjacent T-shaped inner ribs, the side wall plate, the bottom plate and the two adjacent T-shaped inner ribs form a hollow annular silencer chamber, and a sound insulation structure is installed on the inner wall of the silencer chamber, and an air inlet and an air outlet are provided on the bottom plate or the side wall plate; the side wall plate and the bottom plate are detachably connected by fasteners, and a seal is installed between the sealing surfaces of the side wall plate and the bottom plate; the bottom plate includes a sleeve and an annular boss located on both sides of the sleeve, the boss is located on the outside of the side wall plate, and the boss and the side wall plate are both provided with mounting holes for fasteners to pass through, and a seal is installed between the boss and the side wall plate.

2. The sound-absorbing structure air duct based on the ribs inside the underwater submersible according to claim 1, characterized in that: The sealing member comprises a rubber strip installed between the boss and the side wall plate, and a plurality of fasteners are evenly arranged in the circumferential direction of the boss.

3. The sound-absorbing structure air duct based on the ribs inside the underwater submersible according to claim 1, characterized in that: A sealing groove is provided on the contacting side of the boss and the side wall plate, and the sealing groove is matched with a sealing member.

4. The sound-absorbing structure air duct based on the ribs inside the underwater submersible according to claim 1, characterized in that: The bottom plate adopts a multi-section splicing structure, and the splicing parts of the bottom plate adopt a staggered stepped structure, which is fixed by rivets, and the gaps are sealed by rubber strips.

5. The sound-absorbing structure air duct based on the ribs inside the underwater submersible according to claim 1, characterized in that: The sound insulation structure includes a sound absorbing and insulating material pad and a porous plate attached to the outside of the sound absorbing and insulating material pad and completely wrapping the outside of the sound absorbing and insulating material pad. The sound absorbing and insulating material pad is attached to the inner wall of the T-shaped inner rib and the structural air duct body through an adhesive.

6. The sound-absorbing structure air duct based on the ribs inside the underwater submersible according to claim 5, characterized in that: The thickness of the sound-absorbing and insulating material pad is not less than 30 mm.

7. The sound-absorbing structure air duct based on the ribs inside the underwater submersible according to claim 5, characterized in that: The sound-absorbing and insulating material pad is made of glass wool or polyimide, the porous plate is made of stainless steel, and the porosity of the porous plate is 10% to 30%.

8. The sound-absorbing structural air duct based on the ribs inside the underwater submersible according to any one of claims 1 to 7, characterized in that: It also includes a layer of thermal insulation material adhered to the outside of the side wall panels and the bottom panel.

Images