A deep-sea acoustic probe

Abstract

The present application relates to a kind of deep-sea acoustic detection equipment, including first shell assembly, sealing assembly and second shell assembly, the first shell assembly and the second shell assembly are enclosed to form hydraulic chamber, the second shell assembly is movably arranged on the first shell assembly in the first direction, to limit the first sealing ring enters the first occlusion space and the second occlusion space.

Description

Technical Field

[0001] This invention relates to the field of seabed sonar, and in particular to a deep-sea acoustic detection device. Background Technology

[0002] Deep-sea imaging sonar mainly consists of a front cover, a rear cover, and a transducer. The front and rear covers form a hydraulic chamber filled with insulating oil. The transducer is mounted on the front cover and comes into contact with the insulating oil. In the deep-sea environment, the transducer is subjected to oil pressure and water pressure on its inner and outer sides, respectively. The oil pressure offsets some of the water pressure, effectively reducing the deformation of the transducer and thus ensuring its performance.

[0003] The hydraulic chamber contains a circuit board electrically connected to the transducer. To ensure the circuit board functions properly, it's crucial to prevent seawater from entering the hydraulic chamber and causing a short circuit. Therefore, a sealing ring is typically installed at the connection between the front and rear covers. However, during actual testing, it was found that the sealing ring has a very short lifespan; even a slight extension of the testing time causes it to fail, allowing seawater to enter the hydraulic chamber. Summary of the Invention

[0004] Therefore, it is necessary to provide a deep-sea acoustic detection device to address the problem of easy failure of sealing rings in deep-sea imaging sonar.

[0005] A deep-sea acoustic detection device includes a first housing assembly, a sealing assembly, and a second housing assembly, wherein the first housing assembly and the second housing assembly are arranged to form a hydraulic cavity, the hydraulic cavity being filled with a compressible liquid.

[0006] The sealing assembly includes a first sealing ring and a sealing seat. The axial direction of the first sealing ring is a first direction. A first sealing groove is formed on the sealing seat. The first sealing ring abuts against the side wall of the first sealing groove along the first direction. A portion of the first sealing ring is located outside the first sealing groove.

[0007] The sealing seat is mounted on the first housing assembly, and the second housing assembly presses against the portion of the first sealing ring located outside the first sealing groove along the first direction;

[0008] The second housing assembly and the sealing seat are spaced apart in a first direction to form a first engagement space and a second engagement space between the sealing seat and the second housing assembly. The first engagement space is located radially outside the first sealing groove to communicate with the outside of the first housing assembly and the second housing assembly, and the second engagement space is located radially inside the first sealing groove to communicate with the hydraulic chamber.

[0009] The second housing assembly is movably disposed on the first housing assembly along a first direction to restrict the first sealing ring from entering the first engagement space and the second engagement space.

[0010] In one embodiment, the first housing assembly is provided with a guide groove extending in a first direction, and the deep-sea acoustic detection device further includes a guide rod, which is fixed on the second housing assembly. The guide rod cooperates with the guide groove to enable the second housing assembly to obtain movement guidance and limitation in the first direction.

[0011] In one embodiment, the sealing assembly further includes a second sealing ring, and a second sealing groove is provided on the sealing seat. The second sealing ring abuts against the side wall of the second sealing groove along a first direction, and a portion of the second sealing ring is located outside the second sealing groove.

[0012] A limiting groove is formed on the first housing assembly, and at least a portion of the second sealing ring and the sealing seat are located in the limiting groove, so that the sidewall of the limiting groove is pressed against the portion of the second sealing ring located outside the second sealing groove in a first direction;

[0013] The sidewall of the limiting groove and the sealing seat are spaced apart in a first direction to form a third engagement space and a fourth engagement space between the sealing seat and the sidewall of the limiting groove. The third engagement space is located on the radially outer side of the second sealing groove, and the fourth engagement space is located on the radially inner side of the second sealing groove. The sidewall of the limiting groove and the sealing seat are spaced apart in the radial direction of the first sealing ring so that the third engagement space communicates with the outer side of the first housing assembly and the second housing assembly, and the fourth engagement space communicates with the hydraulic chamber.

[0014] The second housing assembly is movably disposed on the first housing assembly along a first direction to restrict the second sealing ring from entering the third engagement space and the fourth engagement space.

[0015] In one embodiment, the deep-sea acoustic detection device satisfies: ;

[0016] Wherein, D1 is the mean diameter of the first sealing ring when it is not deformed, in mm;

[0017] D2 is the mean diameter of the second sealing ring when it is not deformed, in mm;

[0018] d1 is the wire diameter of the first sealing ring when it is not deformed, in mm;

[0019] d2 is the wire diameter of the second sealing ring when it is not deformed, in mm;

[0020] h1 is the depth of the first sealing groove in the first direction, in mm;

[0021] h2 is the depth of the second sealing groove in the first direction, in mm;

[0022] P max The water pressure corresponding to the maximum operating depth of the deep-sea acoustic detection equipment is expressed in MPa.

[0023] V0 is the volume of the compressible liquid when the deep-sea acoustic detection device is in atmospheric pressure, and the unit is L;

[0024] E is the bulk modulus of the compressible liquid, expressed in MPa.

[0025] In one embodiment, the first housing assembly includes a body and a transducer, the body being provided with a mounting port communicating with the hydraulic chamber, and the transducer being mounted at the mounting port;

[0026] The deep-sea acoustic detection equipment meets the following requirements:

[0027] ;

[0028] Wherein, G1 is the elastic modulus of the first sealing ring, in MPa;

[0029] G2 is the elastic modulus of the second sealing ring, in MPa;

[0030] The limiting compression ratio of the first sealing ring;

[0031] This represents the limiting compression ratio of the second sealing ring;

[0032] C1 is the circumference of the circle corresponding to the mean diameter of the first sealing ring when it is not deformed, in mm;

[0033] C2 is the circumference of the circle corresponding to the mean diameter of the second sealing ring when it is not deformed, in mm;

[0034] K is the diameter of the transducer, in mm;

[0035] L is the axial length of the transducer, in mm;

[0036] P 匹配层 The connection strength of the transducer on the body is expressed in MPa.

[0037] In one embodiment, wherein, , H1 is the hardness value of the first sealing ring, and H2 is the hardness value of the second sealing ring.

[0038] In one embodiment, wherein, , .

[0039] In one embodiment, the sealing seat is fixed to the first housing assembly;

[0040] The deep-sea acoustic detection equipment meets the following requirements: ;

[0041] Wherein, D1 is the mean diameter of the first sealing ring when it is not deformed, in mm;

[0042] d1 is the wire diameter of the first sealing ring when it is not deformed, in mm;

[0043] h1 is the depth of the first sealing groove in the first direction, in mm;

[0044] P max The water pressure corresponding to the maximum operating depth of the deep-sea acoustic detection equipment is expressed in MPa.

[0045] V0 is the volume of the compressible liquid when the deep-sea acoustic detection device is in atmospheric pressure, and the unit is L;

[0046] E is the bulk modulus of the compressible liquid, expressed in MPa.

[0047] In one embodiment, the first housing assembly includes a body and a transducer, the body being provided with a mounting port communicating with the hydraulic chamber, and the transducer being mounted at the mounting port;

[0048] The deep-sea acoustic detection equipment meets the following requirements:

[0049] ;

[0050] Wherein, G1 is the elastic modulus of the first sealing ring, in MPa;

[0051] The limiting compression ratio of the first sealing ring;

[0052] C1 is the circumference of the circle corresponding to the mean diameter of the first sealing ring when it is not deformed, in mm;

[0053] K is the diameter of the transducer, in mm;

[0054] L is the axial length of the transducer, in mm;

[0055] P匹配层 The connection strength of the transducer on the body is expressed in MPa.

[0056] In one embodiment, wherein, H1 is the hardness value of the first sealing ring. .

[0057] The beneficial effects of this invention are as follows:

[0058] When the deep-sea acoustic detection equipment is located in shallow water, the pressure of the seawater on the second housing assembly in the first direction is insufficient, resulting in a smaller deformation of the first sealing ring and a larger gap between the first and second housing assemblies. Correspondingly, the volume of the hydraulic chamber and the volume of the compressible fluid within it are larger, and the pressure of the compressible fluid is lower. Therefore, in the first direction, the pressure of the compressible fluid and the seawater can be balanced or have a small pressure difference. Similarly, the compressible fluid and seawater can also achieve pressure balance or a small pressure difference in the radial direction of the first sealing ring. This effectively restricts the first sealing ring from entering the first engagement space.

[0059] When the deep-sea acoustic detection equipment is located at a greater depth, the seawater exerts greater pressure on the second housing assembly in the first direction, reducing the distance between the first and second housing assemblies and further compressing the first sealing ring. Correspondingly, the volume of the hydraulic chamber decreases, and the volume of the compressible fluid within the hydraulic chamber shrinks, causing the pressure of the compressible fluid to increase until the compressible fluid pressure and the seawater pressure reach equilibrium in the first direction, or the first and second housing assemblies come into contact with each other. Simultaneously, a small pressure difference or pressure balance is achieved between the compressible fluid and the seawater in the radial direction of the first sealing ring, effectively preventing the first sealing ring from entering the second engagement space.

[0060] In summary, regardless of the depth of the deep-sea acoustic detection equipment, the first sealing ring always deforms in the middle of the first sealing groove. This effectively prevents the first sealing ring from being damaged, thereby extending its service life and helping to maintain its long-term operational stability. Attached Figure Description

[0061] Figure 1 This is a schematic diagram of the exploded structure of the deep-sea acoustic detection device in Embodiment 1 of the present invention;

[0062] Figure 2 This is a schematic cross-sectional view of the first housing assembly in Embodiment 1 of the present invention;

[0063] Figure 3 This is a cross-sectional structural diagram of the sealing assembly in Embodiment 1 of the present invention;

[0064] Figure 4 This is a schematic cross-sectional view of the deep-sea acoustic detection device in Embodiment 1 of the present invention;

[0065] Figure 5 for Figure 4 Enlarged structural diagram at point A Figure 1 ;

[0066] Figure 6 for Figure 4 Enlarged structural diagram at point A Figure 2 ;

[0067] Figure 7 This is a partially enlarged structural diagram of a deep-sea acoustic detection device in the existing technology.

[0068] Figure label:

[0069] 1. First housing assembly; 11. Body; 111. Guide groove; 112. Limiting groove; 12. Transducer; 2. Sealing assembly; 21. First sealing ring; 22. Sealing seat; 221. First sealing groove; 222. Second sealing groove; 23. Second sealing ring; 3. Second housing assembly; 4. Guide rod; 5. Compressible liquid; 100. First engagement space; 200. Second engagement space; 300. Third engagement space; 400. Fourth engagement space. Detailed Implementation

[0070] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0071] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0072] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0073] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0074] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0075] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0076] Example 1:

[0077] like Figure 1 As shown, this embodiment provides a deep-sea acoustic detection device, including a first housing assembly 1, a sealing assembly 2, and a second housing assembly 3.

[0078] The second housing assembly 3 is mounted on the first housing assembly 1, thereby forming a hydraulic chamber between the first housing assembly 1 and the second housing assembly 3. The hydraulic chamber is used to fill a compressible liquid 5. The compressible liquid 5 is, for example, insulating oil, and its volume can increase or decrease depending on the pressure it is subjected to. A sealing assembly 2 is disposed between the first housing assembly 1 and the second housing assembly 3. The sealing assembly 2 is used to prevent the compressible liquid 5 from leaking to the outside of the first housing assembly 1 and the second housing assembly 3, and also to prevent seawater from the outside of the first housing assembly 1 and the second housing assembly 3 from entering the hydraulic chamber.

[0079] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, the first housing assembly 1 includes a body 11 and a transducer 12. The body 11 is provided with a mounting port that connects to the hydraulic chamber, and the transducer 12 is installed at the mounting port. With this configuration, the inner side of the transducer 12 can contact the compressible liquid 5, and the outer side of the transducer 12 can contact the seawater.

[0080] like Figure 1 and Figure 3 As shown, the sealing assembly 2 in this embodiment includes a first sealing ring 21, a sealing seat 22, and a second sealing ring 23. The sealing seat 22 is generally annular, and a first sealing groove 221 and a second sealing groove 222 are formed on the sealing seat 22, extending circumferentially along the sealing seat 22. The first sealing ring 21 is installed in the first sealing groove 221, and the second sealing ring 23 is installed in the second sealing groove 222, thus enabling the first sealing ring 21 and the second sealing ring 23 to be coaxially arranged. The axial direction of the first sealing ring 21 is a first direction, and the first sealing ring 21 abuts against the side wall of the first sealing groove 221 along the first direction, with a portion of the first sealing ring 21 located on the outside of the first sealing groove 221. The second sealing ring 23 abuts against the side wall of the second sealing groove 222 along the first direction, with a portion of the second sealing ring 23 located on the outside of the second sealing groove 222.

[0081] like Figure 2 As shown, a limiting groove 112 is formed on the rear edge of the main body 11, and the limiting groove 112 extends along the first direction. Figures 4-6 As shown, the second sealing ring 23 is located within the limiting groove 112, and the sealing seat 22 is at least partially located within the limiting groove 112. This design effectively prevents the sealing assembly 2 from disengaging from the first housing assembly 1 and the second housing assembly 3 through radial movement. Furthermore, the second housing assembly 3 is pressed along a first direction onto the portion of the first sealing ring 21 located outside the first sealing groove 221, and the sidewall of the limiting groove 112 is pressed along the first direction onto the portion of the second sealing ring 23 located outside the second sealing groove 222.

[0082] Furthermore, the second housing assembly 3 and the sealing seat 22 are spaced apart in the first direction, so that a first engagement space 100 and a second engagement space 200 are formed between the sealing seat 22 and the second housing assembly 3. At the same time, the side wall of the limiting groove 112 and the sealing seat 22 are spaced apart in the first direction, so that a third engagement space 300 and a fourth engagement space 400 are formed between the sealing seat 22 and the side wall of the limiting groove 112.

[0083] The first engagement space 100 is located radially outside the first sealing groove 221 to connect to seawater outside the first housing assembly 1 and the second housing assembly 3; the second engagement space 200 is located radially inside the first sealing groove 221 to connect to the compressible liquid 5 in the hydraulic chamber; the third engagement space 300 is located radially outside the second sealing groove 222, and the fourth engagement space 400 is located radially inside the second sealing groove 222. In addition, the sidewall of the limiting groove 112 and the sealing seat 22 are radially spaced apart from the first sealing ring 21. With this design, the third engagement space 300 can connect to seawater outside the first housing assembly 1 and the second housing assembly 3, while the fourth engagement space 400 can connect to the compressible liquid 5 in the hydraulic chamber.

[0084] The inventors discovered that the short service life of the first sealing ring 21 and the second sealing ring 23 in the prior art is due to the following mechanism: the second housing assembly 3 and the main body 11 are fixedly connected, therefore the volume of the hydraulic chamber is fixed; in other words, the volume of the compressible liquid 5 within the hydraulic chamber is also fixed. Correspondingly, the oil pressure values ​​borne by the first sealing ring 21 and the second sealing ring 23 in the radial direction do not change. However, the water pressure borne by the first sealing ring 21 and the second sealing ring 23 in the radial direction changes according to the seawater depth where the deep-sea acoustic detection equipment is located. Figure 7 As shown, when the deep-sea acoustic detection equipment is located in deep water, the water pressure on the first sealing ring 21 and the second sealing ring 23 in the radial direction is greater than the oil pressure in the radial direction. This causes a portion of the first sealing ring 21 to enter the second engagement space 200 under water pressure, and a portion of the second sealing ring 23 to enter the fourth engagement space 400 under water pressure, resulting in damage to the first and second sealing rings 21 and 23. Conversely, when the deep-sea acoustic detection equipment is located in shallow water, the water pressure on the first and second sealing rings 21 and 23 in the radial direction is less than the oil pressure in the radial direction. This causes a portion of the first sealing ring 21 to enter the first engagement space 100 under oil pressure, and a portion of the second sealing ring 23 to enter the third engagement space 300 under oil pressure, similarly leading to damage to the first and second sealing rings 21 and 23. It is precisely because of this damage that the sealing performance of the first and second sealing rings 21 and 23 decreases sharply.

[0085] Based on the discovery of the aforementioned problem mechanism, the inventors proposed a solution by making the second housing assembly 3 movable along a first direction on the first housing assembly 1. With this design, the volume of the hydraulic chamber and the volume of the compressible liquid 5 within the hydraulic chamber can be adaptively changed according to the seawater pressure.

[0086] Specifically, such as Figure 5 and Figure 6 As shown, when the deep-sea acoustic detection equipment is located in shallow water, the pressure of the seawater on the second housing assembly 3 in the first direction is insufficient, resulting in smaller deformation of the first sealing ring 21 and the second sealing ring 23, and a larger distance between the first housing assembly 1 and the second housing assembly 3. Correspondingly, the volume of the hydraulic chamber and the volume of the compressible liquid 5 within the hydraulic chamber are larger, and the pressure of the compressible liquid 5 is lower. Therefore, in the first direction, the pressure of the compressible liquid 5 and the seawater pressure can be balanced or have a small pressure difference. Similarly, the compressible liquid 5 and the seawater can also achieve pressure balance or a small pressure difference in the radial direction of the first sealing ring 21 and the second sealing ring 23. This effectively restricts the first sealing ring 21 from entering the first engagement space 100 and the second sealing ring 23 from entering the third engagement space 300. During the above process, although the deformation of the first sealing ring 21 and the second sealing ring 23 is small, they are always in a compressed state, thus ensuring the sealing of the hydraulic chamber.

[0087] When the deep-sea acoustic detection equipment is located at a greater depth, the pressure of the seawater on the second housing assembly 3 in the first direction is greater, the distance between the first housing assembly 1 and the second housing assembly 3 decreases, and the first sealing ring 21 and the second sealing ring 23 are further compressed. Correspondingly, the volume of the hydraulic chamber decreases, and the volume of the compressible liquid 5 within the hydraulic chamber shrinks, causing the pressure of the compressible liquid 5 to increase until the pressure of the compressible liquid 5 and the seawater pressure are balanced in the first direction or the first housing assembly 1 and the second housing assembly 3 are completely fitted together. Correspondingly, at this time, the compressible liquid 5 and the seawater can also achieve pressure balance or a small pressure difference in the radial direction of the first sealing ring 21 and the second sealing ring 23, thus effectively restricting the first sealing ring 21 from entering the second engagement space 200 and restricting the second sealing ring 23 from entering the fourth engagement space 400.

[0088] In summary, regardless of the depth of the deep-sea acoustic detection equipment, the first sealing ring 21 always deforms at the middle position of the first sealing groove 221, and the second sealing ring 23 always deforms at the middle position of the second sealing groove 222. This effectively prevents the first sealing ring 21 and the second sealing ring 23 from being damaged, thereby effectively improving the working life of the first sealing ring 21 and the second sealing ring 23 and helping to maintain the long-term working stability of the first sealing ring 21 and the second sealing ring 23.

[0089] like Figure 1 , Figure 2 and Figure 4 As shown, exemplarily, in this embodiment, the main body 11 is provided with a guide groove 111 extending along a first direction. The deep-sea acoustic detection device also includes a guide rod 4, which is fixed to the second housing assembly 3. The guide rod 4 is slidably disposed at the guide groove 111, thereby providing movement guidance when the second housing assembly 3 moves along the first direction on the main body 11.

[0090] Furthermore, the cooperation between the guide rod 4 and the guide groove 111 can limit the range of movement of the second housing assembly 3 on the body 11. Specifically, the structure can be implemented such that the sidewall of the guide rod 4 is recessed to form a groove extending in the first direction, and a protrusion is provided on the sidewall of the guide groove 111, with the protrusion located within the groove.

[0091] In other embodiments, other structures may be used to guide and limit the movement of the second housing assembly 3 along the first direction on the body 11. Specific structures are all existing technologies and will not be described in detail in this embodiment.

[0092] It should be noted that, in this embodiment, the first sealing ring 21 is always located in the middle of the first sealing groove 221, and the second sealing ring 23 is always located in the middle of the second sealing groove 222. Therefore, the first sealing ring 21 and the second sealing ring 23 are both spaced apart radially from each other. Furthermore, the first sealing ring 21 does not enter the first engagement space 100 or the second engagement space 200, and the second sealing ring 23 does not enter the third engagement space 300 or the fourth engagement space 400. Therefore, when the first sealing ring 21 and the second sealing ring 23 are compressed to their limits, the first sealing ring 21 can fully enter the first sealing groove 221, and the second sealing ring 23 can fully enter the second sealing groove 222.

[0093] Based on this, the maximum compression ratio of the first sealing ring 21 and the second sealing ring 23 can be adjusted by changing the depth of the first sealing groove 221 and the second sealing groove 222 in the first direction, thereby designing the maximum working depth of the deep-sea acoustic detection equipment.

[0094] Specifically, deep-sea acoustic detection equipment meets the following requirements: ;

[0095] Wherein, D1 is the mean diameter of the first sealing ring 21 when it is not deformed, in mm; D2 is the mean diameter of the second sealing ring 23 when it is not deformed, in mm; d1 is the wire diameter of the first sealing ring 21 when it is not deformed, in mm; d2 is the wire diameter of the second sealing ring 23 when it is not deformed, in mm; h1 is the depth of the first sealing groove 221 in the first direction, in mm; h2 is the depth of the second sealing groove 222 in the first direction, in mm; P max V0 is the water pressure corresponding to the maximum working depth of the deep-sea acoustic detection equipment, in MPa; V0 is the volume of the compressible liquid 5 when the deep-sea acoustic detection equipment is under atmospheric pressure, in L; E is the bulk modulus of the compressible liquid 5, in MPa.

[0096] In this embodiment, d1=d2=7mm, h1=h2=5.25mm, D1=D2=116mm, the maximum distance between the body 11 and the second housing assembly 3 in the first direction is 3.5mm, the minimum distance is 0mm, V0=0.467L, and E=1400MPa. At this time, P... max It is much greater than 60MPa (the water pressure corresponding to a water depth of 6000 meters), which can meet the actual working requirements of deep-sea acoustic detection equipment.

[0097] The first sealing ring 21 and the second sealing ring 23 generate corresponding resistance when they deform. The resistance of the first sealing ring 21 is... The resistance of the second sealing ring 23 Wherein, G1 is the elastic modulus of the first sealing ring 21, in MPa; G2 is the elastic modulus of the second sealing ring 23, in MPa; The compression ratio of the first sealing ring 21; C1 is the compression ratio of the second sealing ring 23; C2 is the circumference of the first sealing ring 21 when it is not deformed, in mm; C3 is the circumference of the second sealing ring 23 when it is not deformed, in mm.

[0098] C1=πD1, C2=πD2, , H1 is the hardness value of the first sealing ring 21, and H2 is the hardness value of the second sealing ring 23. , m1 is the thickness of the first sealing ring 21 in the first direction after compression, and m2 is the thickness of the second sealing ring 23 in the first direction after compression.

[0099] Taking the first sealing ring 21 as an example, after the first sealing ring 21 is deformed under pressure, the contact surface with the side wall of the first sealing groove 221 is annular, and the width of this annularity is... The annular width was obtained through geometric deformation analysis and experimental fitting. Similarly, the annular contact surface width of the second sealing ring 23 after compression deformation and the sidewall of the second sealing groove 222 is... .

[0100] In this embodiment, H1=H2=70A, corresponding to .

[0101] When the distance between the body 11 and the second housing assembly 3 in the first direction is 3.5 mm (at which point the distance between the body 11 and the second housing assembly 3 in the first direction reaches its maximum value), , The pressure of the compressible liquid 5 is 0 MPa. In other words, the minimum pressure exerted by the first sealing ring 21 and the second sealing ring 23 on the second housing assembly 3 is... .

[0102] The area of ​​seawater acting on the second shell assembly 3 is πD1 2 / 4=10562.96mm 2 At a depth of 580m, the seawater pressure is approximately 0.58MPa. The thrust exerted by the seawater on the second housing assembly 3 is precisely sufficient to balance the minimum pressure exerted on the second housing assembly 3 by the first sealing ring 21 and the second sealing ring 23. In other words, when the deep-sea acoustic detection equipment is located in a seawater depth range of 0m-580m, the second housing assembly 3 is restricted along the first direction on the body 11 and therefore cannot move. Consequently, the distance between the body 11 and the second housing assembly 3 in the first direction remains constant at 3.5mm. Correspondingly, the pressure of the compressible liquid 5 remains constant at 0 MPa. Therefore, when the deep-sea acoustic detection equipment is located in a water depth range of 0m-580m, one side of the transducer 12 is compressed by seawater, while the other side cannot be supported by the compressible liquid 5. To prevent the transducer 12 from detaching from the body 11, the following conditions must be met... , where P 580m The pressure of the seawater at a depth of 580m is denoted by ρ; K is the diameter of transducer 12, in mm; P 匹配层 K represents the connection strength of transducer 12 to body 11, in MPa; L represents the axial length of transducer 12, in mm. In this embodiment, K = 60 mm, L = 20 mm, P 匹配层 =13.8MPa. Among them, , .

[0103] When the deep-sea acoustic detection equipment is located at a depth greater than 580m, it must meet the following requirements: , where P 海水 For seawater pressure, P 可压缩液体The pressure of the compressible liquid 5. Since the second housing assembly 3 is subjected to the pressure of seawater, the pressure of the compressible liquid 5, the pressure of the first sealing ring 21, and the pressure of the second sealing ring 23 simultaneously, the pressure balance condition is satisfied, therefore... Based on the two relationships above, we can further derive: .

[0104] In this embodiment, when the deep-sea acoustic detection equipment is at its maximum operating depth, , The limiting compression ratio of the first sealing ring 21, ; , The limiting compression ratio of the second sealing ring 23, .

[0105] Deep-sea acoustic detection equipment should meet the following requirements:

[0106] .

[0107] In this embodiment, Corresponding less than .

[0108] Example 2:

[0109] The difference between this embodiment and embodiment 1 is that the sealing seat 22 is fixed on the first housing assembly 1, and the sealing assembly 2 includes only the first sealing ring 21.

[0110] Correspondingly, at this time, the deep-sea acoustic detection equipment meets the following requirements: Wherein, D1 is the mean diameter of the first sealing ring 21 when it is not deformed, in mm; d1 is the wire diameter of the first sealing ring 21 when it is not deformed, in mm; h1 is the depth of the first sealing groove 221 in the first direction, in mm; P max V0 is the water pressure corresponding to the maximum working depth of the deep-sea acoustic detection equipment, in MPa; V0 is the volume of the compressible liquid 5 when the deep-sea acoustic detection equipment is under atmospheric pressure, in L; E is the bulk modulus of the compressible liquid 5, in MPa.

[0111] Deep-sea acoustic detection equipment also meets the following requirements:

[0112] ;

[0113] Wherein, G1 is the elastic modulus of the first sealing ring 21, in MPa; C1 is the ultimate compression ratio of the first sealing ring 21; C1 is the circumference of the circle corresponding to the mean diameter of the first sealing ring 21 when it is not deformed, in mm.

[0114] K is the diameter of transducer 12, in mm; L is the axial length of transducer 12, in mm; P 匹配层 The connection strength of transducer 12 on body 11 is expressed in MPa.

[0115] Furthermore, H1 is the hardness value of the first sealing ring 21. .

[0116] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0117] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A deep-sea acoustic detection device, characterized in that, It includes a first housing assembly (1), a sealing assembly (2), and a second housing assembly (3), wherein the first housing assembly (1) and the second housing assembly (3) are arranged to form a hydraulic cavity for filling a compressible liquid (5). The sealing assembly (2) includes a first sealing ring (21) and a sealing seat (22). The axial direction of the first sealing ring (21) is a first direction. A first sealing groove (221) is provided on the sealing seat (22). The first sealing ring (21) abuts against the side wall of the first sealing groove (221) along the first direction. The sealing seat (22) is mounted on the first housing assembly (1), and the second housing assembly (3) is pressed along the first direction onto the portion of the first sealing ring (21) located outside the first sealing groove (221); The second housing assembly (3) and the sealing seat (22) are spaced apart in a first direction to form a first engagement space (100) and a second engagement space (200) between the sealing seat (22) and the second housing assembly (3). The first engagement space (100) is located on the radially outer side of the first sealing groove (221) to communicate with the outer side of the first housing assembly (1) and the second housing assembly (3). The second engagement space (200) is located on the radially inner side of the first sealing groove (221) to communicate with the hydraulic chamber. The second housing assembly (3) is movably disposed on the first housing assembly (1) along a first direction to restrict the first sealing ring (21) from entering the first engagement space (100) and the second engagement space (200).

2. The deep-sea acoustic detection device according to claim 1, characterized in that, The first housing assembly (1) is provided with a guide groove (111) extending in a first direction. The deep-sea acoustic detection device also includes a guide rod (4), which is fixed on the second housing assembly (3). The guide rod (4) cooperates with the guide groove (111) to enable the second housing assembly (3) to obtain movement guidance and limitation in the first direction.

3. The deep-sea acoustic detection device according to claim 2, characterized in that, The sealing assembly (2) further includes a second sealing ring (23), and a second sealing groove (222) is provided on the sealing seat (22). The second sealing ring (23) abuts against the side wall of the second sealing groove (222) along the first direction, and a part of the second sealing ring (23) is located outside the second sealing groove (222). A limiting groove (112) is formed on the first housing assembly (1), and at least a portion of the second sealing ring (23) and the sealing seat (22) are located in the limiting groove (112) so that the sidewall of the limiting groove (112) is pressed against the portion of the second sealing ring (23) located outside the second sealing groove (222) in a first direction; The sidewall of the limiting groove (112) and the sealing seat (22) are spaced apart in a first direction to form a third engagement space (300) and a fourth engagement space (400) between the sealing seat (22) and the sidewall of the limiting groove (112). The third engagement space (300) is located on the radial outer side of the second sealing groove (222), and the fourth engagement space (400) is located on the radial inner side of the second sealing groove (222). The sidewall of the limiting groove (112) and the sealing seat (22) are spaced apart in the radial direction of the first sealing ring (21) so that the third engagement space (300) communicates with the outer side of the first housing assembly (1) and the second housing assembly (3), and the fourth engagement space (400) communicates with the hydraulic chamber. The second housing assembly (3) is movably disposed on the first housing assembly (1) along a first direction to restrict the second sealing ring (23) from entering the third engagement space (300) and the fourth engagement space (400).

4. The deep-sea acoustic detection device according to claim 3, characterized in that, The deep-sea acoustic detection equipment meets the following requirements: ; Wherein, D1 is the mean diameter of the first sealing ring (21) when it is not deformed, in mm; D2 is the mean diameter of the second sealing ring (23) when it is not deformed, in mm; d1 is the wire diameter of the first sealing ring (21) when it is not deformed, in mm; d2 is the wire diameter of the second sealing ring (23) when it is not deformed, in mm; h1 is the depth of the first sealing groove (221) in the first direction, in mm; h2 is the depth of the second sealing groove (222) in the first direction, in mm; P max The water pressure corresponding to the maximum operating depth of the deep-sea acoustic detection equipment is expressed in MPa. V0 is the volume of the compressible liquid (5) in the deep-sea acoustic detection device under atmospheric pressure, in L; E is the bulk modulus of the compressible liquid (5), in MPa.

5. The deep-sea acoustic detection device according to claim 3, characterized in that, The first housing assembly (1) includes a body (11) and a transducer (12). The body (11) is provided with an installation port, which is connected to the hydraulic chamber. The transducer (12) is installed at the installation port. The deep-sea acoustic detection equipment meets the following requirements: ； Wherein, G1 is the elastic modulus of the first sealing ring (21), in MPa; G2 is the elastic modulus of the second sealing ring (23), in MPa; The limiting compression ratio of the first sealing ring (21); The limiting compression ratio of the second sealing ring (23); C1 is the circumference of the circle corresponding to the mean diameter of the first sealing ring (21) when it is not deformed, in mm; C2 is the circumference of the circle corresponding to the mean diameter of the second sealing ring (23) when it is not deformed, in mm; d1 is the wire diameter of the first sealing ring (21) when it is not deformed, in mm; d2 is the wire diameter of the second sealing ring (23) when it is not deformed, in mm; D1 is the mean diameter of the first sealing ring (21) when it is not deformed, in mm; K is the diameter of the transducer (12), in mm; L is the axial length of the transducer (12), in mm; P 匹配层 The connection strength of the transducer (12) on the body (11) is expressed in MPa.

6. The deep-sea acoustic detection device according to claim 5, characterized in that, in, , H1 is the hardness value of the first sealing ring (21), and H2 is the hardness value of the second sealing ring (23).

7. The deep-sea acoustic detection device according to claim 5, characterized in that, in, ， ； h1 is the depth of the first sealing groove (221) in the first direction, in mm; h2 is the depth of the second sealing groove (222) in the first direction, in mm.

8. The deep-sea acoustic detection device according to claim 1, characterized in that, The sealing seat (22) is fixed to the first housing assembly (1); The deep-sea acoustic detection equipment meets the following requirements: ; Wherein, D1 is the mean diameter of the first sealing ring (21) when it is not deformed, in mm; d1 is the wire diameter of the first sealing ring (21) when it is not deformed, in mm; h1 is the depth of the first sealing groove (221) in the first direction, in mm; P max The water pressure corresponding to the maximum operating depth of the deep-sea acoustic detection equipment is expressed in MPa. V0 is the volume of the compressible liquid (5) in the deep-sea acoustic detection device under atmospheric pressure, in L; E is the bulk modulus of the compressible liquid (5), in MPa.

9. The deep-sea acoustic detection device according to claim 8, characterized in that, The first housing assembly (1) includes a body (11) and a transducer (12). The body (11) is provided with an installation port, which is connected to the hydraulic chamber. The transducer (12) is installed at the installation port. The deep-sea acoustic detection equipment meets the following requirements: ； Wherein, G1 is the elastic modulus of the first sealing ring (21), in MPa; The limiting compression ratio of the first sealing ring (21); C1 is the circumference of the circle corresponding to the mean diameter of the first sealing ring (21) when it is not deformed, in mm; K is the diameter of the transducer (12), in mm; L is the axial length of the transducer (12), in mm; P 匹配层 The connection strength of the transducer (12) on the body (11) is expressed in MPa.

10. The deep-sea acoustic detection device according to claim 9, characterized in that, in, H1 is the hardness value of the first sealing ring (21). .

Images