Silencing structure air pipe based on ribs in underwater vehicle

Abstract

The silencing structure air pipe based on the inner ribs of the underwater vehicle comprises a structure air pipe body and a silencing mechanism installed in the structure air pipe body, the multiple T-shaped inner ribs are fixed to the inner side wall of the structure air pipe body, and webs of the T-shaped inner ribs are fixedly connected with the inner side wall of the structure air pipe body; the wing plate structure of the T-shaped inner ribs is parallel to the inner side wall of the air pipe body, the silencing mechanism comprises side wall plates fixed to the wing plates and a bottom plate connected with the side wall plates on the two adjacent T-shaped inner ribs, the side wall plates, the bottom plate and the two adjacent T-shaped inner ribs form a hollow annular silencing cavity, and a silencing and sound insulation structure is installed on the inner side wall of the silencing cavity. An air inlet and an air outlet are formed in the bottom plate or the side wall plate. According to the air pipe with the noise elimination structure, the noise elimination structure and the ship body structure are conformally designed to form the air pipe with the compact structure, recycling of waste space is achieved, and circulating air noise is restrained.

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 detection, maneuvering, excavation, personnel activities and other complex functional requirements, the main structure of underwater submersibles often adopts cylindrical shell + annular ribs (see Figure 1 ) to strengthen the structural strength, so as to isolate and resist the water pressure from the deep sea and ensure the safety and integrity of the submersible. However, the annular ribs arranged in sequence along the axial direction inside the submersible compress the effective space inside the submersible. The protruding inner ribs have limited "layer height" and "net width", and cannot accommodate slightly larger equipment or equipment, forming a large number of unusable abandoned areas, wasting very precious space resources.

[0003] In addition, as a core system to ensure the temperature and humidity environment required for the comfort of personnel and the reliable operation of equipment, the ventilation and air-conditioning system is one of the key systems of underwater submersibles. However, due to the characteristics of underwater submersibles such as closed internal cabins, complex hydrological environments in different sea areas, numerous heating equipment in the cabins, and diverse personnel needs, especially with the development and transformation from small to large and from conventional energy to nuclear energy, the ventilation and air-conditioning system often has the characteristics of high load, large air volume, and high noise level, making it difficult to create a comfortable low-noise environment for personnel. In order to control air noise and pipeline vibration, slowing down the air flow rate in the pipe is an effective method, but this also leads to a huge area of ​​​​air ducts and a complex pipeline network, which brings a great burden to underwater submersibles and also squeezes other equipment and personnel activity space, resulting in congestion and narrowness, and difficult equipment maintenance.

[0004] Therefore, the key issue that needs to be solved urgently is to achieve quiet ventilation and air conditioning and ensure the comfort of personnel while fully improving the utilization rate of space to provide more comfortable space for personnel and a wider space for equipment maintenance. 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: 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, the silencer mechanism comprises 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.

[0007] Preferably, the side wall plate and the bottom plate are detachably connected via fasteners, and a seal is installed between the sealing surfaces of the side wall plate and the bottom plate.

[0008] 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, 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.

[0009] 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.

[0010] Preferably, a sealing groove is provided on the contacting side of the boss and the side wall plate, and the sealing groove is used in conjunction with a sealing member.

[0011] Preferably, the bottom plate adopts a multi-section splicing structure, the joints of the bottom plate adopt a staggered stepped structure, are fixed by rivets, and the gaps are sealed by rubber strips.

[0012] Preferably, the sound insulation structure comprises 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, and 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 by adhesive.

[0013] Preferably, the thickness of the sound absorbing and insulating material pad is not less than 30 mm.

[0014] 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%.

[0015] Preferably, the sound-absorbing structural air duct based on the ribs inside the underwater submersible also includes a layer of thermal insulation material adhered to the outside of the side wall panels and the bottom plate.

[0016] The sound-absorbing structure air duct based on the ribs in the underwater submersible proposed by the present invention has the following beneficial effects: (1) By integrating the traditional air duct with the internal ribs 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; (2) Abandoning welding, the bottom plate and side wall plate can be detachably connected, thus facilitating disassembly and maintenance; (3) Combined with porous panels and sound insulation technology, it effectively suppresses air circulation noise and effectively reduces vibration noise transmission; (4) Flexible and diverse air inlet and outlet types, easy to connect with external air ducts.

[0017] (5) The sound-absorbing structure air duct has the advantages of simple structure, stable and reliable operation and good sound-absorbing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the silencing structure air duct based on the ribs in the underwater submersible according to the present invention after partial structure disassembly; Figure 2 It is a schematic cross-sectional structure diagram of the sound-absorbing structure air duct based on the ribs in the underwater submersible according to the present invention; Figure 3 It is a partial cross-sectional structural schematic diagram of the sound-absorbing structure air duct based on the ribs in the underwater submersible of the present invention; Figure 4 It is a schematic diagram of the sealing substructure of the sound-absorbing structure air duct based on the ribs inside the underwater submersible of the present invention; Figure 5 It is a schematic structural diagram of the bottom plate splicing in the air duct of the sound-absorbing structure based on the ribs in the underwater submersible according to the present invention; Figure 6 It 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 in the underwater submersible according to the present invention; Figure 7 It 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 in the underwater submersible of the present invention; Figure 8 The present invention 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.

[0019] 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.

[0020] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0022] 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", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] Reference Figures 1 to 3 In this preferred embodiment, a sound-absorbing structural air duct based on the ribs in an underwater submersible includes 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: A plurality of T-shaped inner ribs 10 are fixed on the inner wall of the structural air duct body 1, the web of the T-shaped inner rib 10 is fixedly connected to the inner wall of the structural air duct body 1, the wing plate of the T-shaped inner rib 10 is arranged parallel to the inner wall of the structural air duct body 1, and the silencer mechanism includes a side wall plate 2 fixed on the wing plate, a bottom plate 3 connecting the side wall plates 2 on 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-absorbing and insulating structure is installed on the inner wall of the silencer cavity, and an air inlet and an air outlet are opened on the bottom plate 3 or the side wall plate 2 (so as to facilitate connection with an external air duct).

[0024] 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.

[0025] The overall protruding height of the silencing 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 to meet the requirements of controlling the air supply 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.

[0026] Further, refer to Figure 3 and Figure 4 The side wall plate 2 and the bottom plate 3 are detachably connected by fasteners 8, and a seal is installed between the sealing surfaces of the side wall plate 2 and the bottom plate 3. The bottom plate 3 is detachably installed, so as to facilitate later repair and maintenance. A seal is installed between the sealing surfaces of the side wall plate 2 and the bottom plate 3, which can effectively prevent air leakage at the gap.

[0027] Specifically, in this embodiment, referring to Figure 3The bottom plate 3 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 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.

[0028] 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, and 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 60 mm to 100 mm.

[0029] Further, refer to Figure 4 The contacting sides of the boss and the side wall 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.

[0030] 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 part of the bottom plate 3 adopts a staggered step structure, which is fixed by rivets 9, and the gap is sealed by rubber strips 7.

[0031] 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.

[0032] The thickness of the sound absorbing and insulating material pad 6 is not less than 30 mm to ensure a 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, and the porosity of the porous plate 5 is 10% to 30%.

[0033] 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 from the air in the duct to the upstream and downstream; the other is that the air duct has cross-sectional mutation structures such as bends, reducers and tees, and the circulating air forms fluid-solid coupling excitation due to the drastic changes in wind speed and wind direction, generating secondary vibration noise. For this reason, a composite sound-absorbing and sound-insulating structure of a sound-absorbing and sound-insulating material pad 6 and a porous plate 5 is laid on the surface of the inner rib (see Figure 6 and Figure 7). The sound insulation structure is conformally designed with the structural air duct and is attached to the inner ribs and the surface of the side wall plate 2 of the pressure hull by adhesive; in addition, the porous plate 5 is attached to the surface of the sound absorbing and insulating material pad 6, and can also serve as a protective layer to prevent the long-term direct scouring of air and cause dust to fall. After the air sound energy enters the interior of the sound absorbing and insulating material pad 6 through numerous pores, it is continuously attenuated through refraction, absorption and other effects.

[0034] Furthermore, the silencing structure air duct based on the ribs inside the underwater submersible also includes a thermal insulation material layer 4 pasted on the outside of the side wall plate 2 and the bottom plate 3. The thermal insulation material layer 4 is pasted on the outside of the side wall plate 2 and the bottom plate 3 by an adhesive to isolate the cold air in the duct from the external hot and humid air to prevent condensation on the outer surface of the air duct. The thermal insulation material layer 4 is opened at the position of the air inlet and the air outlet.

[0035] The side wall plate 2, the bottom plate 3 and the porous plate 5 together form the internal cavity of the structural air duct, which serves as a passage for air circulation. The structural air duct can be set with flexible and diverse air inlet and outlet patterns (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 the air noise, and is finally sent to the external cabin from the air outlet. 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 velocity, and on the other hand, it is also necessary to take into account the excessive size of the air duct caused by too low flow velocity. The air duct flow cross section is designed according to the following formula: ; 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.

[0036] Table 1 Recommended wind speed

[0037] The sound-absorbing structure air duct based on the ribs inside the underwater submersible proposed in this embodiment has the following beneficial effects: (1) By integrating the traditional air duct with the internal ribs 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; (2) Abandoning the welding method, the bottom plate 3 and the side wall plate 2 are detachably connected, thereby facilitating disassembly and maintenance; (3) Combined with the porous plate 5 and sound insulation technology, it effectively suppresses air circulation noise and effectively reduces vibration noise transmission; (4) Flexible and diverse air inlet and outlet types, easy to connect with external air ducts.

[0038] (5) The sound-absorbing structure air duct has the advantages of simple structure, stable and reliable operation and good sound-absorbing effect.

[0039] 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 specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sound-absorbing structural 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 wing plates of the T-shaped inner ribs are arranged parallel to the inner wall of the structural air duct body, the silencer mechanism comprises 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.

2. The sound-absorbing structural air duct based on the ribs in the underwater submersible according to claim 1, characterized in that: The side wall plate and the bottom plate are detachably connected via fasteners, and a sealing member is installed between the sealing surfaces of the side wall plate and the bottom plate.

3. The sound-absorbing structural air duct based on the ribs in the underwater submersible according to claim 2, characterized in that: The bottom 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 plates. Both the bosses and the side wall plates are provided with mounting holes for fasteners to pass through. A seal is installed between the bosses and the side wall plates.

4. The sound-absorbing structural air duct based on the ribs in the underwater submersible according to claim 3 is 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.

5. The sound-absorbing structural air duct based on the ribs in the underwater submersible according to claim 3, characterized in that: The sides of the boss and the side wall plate that contact each other are both provided with sealing grooves, and the sealing grooves are matched with sealing components.

6. The sound-absorbing structural air duct based on the ribs in 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 step structure, which is fixed by rivets, and the gaps are sealed by rubber strips.

7. The sound-absorbing structural air duct based on the ribs in the underwater submersible according to claim 1, characterized in that: The sound insulation structure comprises 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.

8. The sound-absorbing structural air duct based on the ribs in the underwater submersible according to claim 7, characterized in that: The thickness of the sound absorbing and insulating material pad is not less than 30 mm.

9. The sound-absorbing structural air duct based on the ribs in the underwater submersible according to claim 7 is 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%.

10. The sound-absorbing structural air duct based on the ribs in the underwater submersible according to any one of claims 1 to 9, characterized in that: It also includes a heat-insulating material layer pasted on the outside of the side wall panels and the bottom panel.

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