Buoyancy adjusting push type underwater unfolding device and method

Abstract

The invention provides a buoyancy adjusting propelling type underwater unfolding device and method, relates to the technical field of marine acoustic measurement, and aims to solve the problem that the tensioning efficiency of a propeller is low in the current floating process, a limiting cylinder and a buoyancy cylinder which are matched with each other are arranged at the tail end of a shell, and the buoyancy cylinder slides relative to the limiting cylinder under the action of a driving element; one end, facing the impeller of the propeller, of the buoyancy cylinder is a spherical crown surface, and the spherical crown surface of the buoyancy cylinder is close to the impeller in the floating process so as to guide the operation wake flow of the impeller, so that the working efficiency of the propeller is improved, and the floating and tensioning efficiency is improved; and the requirement of quickly adjusting the position of the sensor linear array is met.

Description

Technical Field

[0001] The present invention relates to the technical field of ocean acoustic measurement, and in particular to a buoyancy-regulated propulsion-type underwater deployment device and method. Background Art

[0002] Fiber optic hydrophone is an underwater acoustic signal sensor based on optical fiber and optoelectronic technology. It can convert underwater acoustic wave vibrations into optical signals through optical coherence detection, and then transmit the optical signals to the signal processing system through optical fiber to extract the acoustic signal information. Compared with traditional electrical signal hydrophones, fiber optic hydrophones have the advantages of high sensitivity, good frequency response characteristics, strong anti-electromagnetic interference ability, and suitability for long-distance transmission and networking. Sensor linear arrays composed of fiber optic hydrophones have a wide range of applications in the field of marine acoustic measurement. However, the underwater deployment and horizontal attitude maintenance of long-size linear arrays have always been technical problems that have plagued the engineering application of submerged buoy linear arrays.

[0003] A Chinese patent (publication number: CN110949642B) discloses an underwater oil-filled tow cable towing adjustment device, which changes the volume of the buoyancy regulator by adjusting the buoyancy regulator, thereby changing the pitch of the entire towing adjustment device, towing the tow cable up and down, thereby adjusting the depth of the underwater tow cable, and using the damping umbrella current resistance and propeller hybrid power to provide tension along the cable length for the tow cable, so that the underwater linear array detection system can work and retract normally. The skin structure on the damping umbrella receives the action of the ocean current to provide tension for the tow cable, but it is distributed around the propeller, and the propeller's wake is constrained within the range of the damping umbrella, resulting in a disordered distribution of the water flow at the location of the propeller, and the propeller has low working efficiency, and it is difficult to provide a good propulsion auxiliary effect when the tow cable rises; in addition, the volume change of the oil bag is used to adjust the buoyancy, and a complete set of oil storage and extraction components need to be set inside the entire towing adjustment device, resulting in a large mass of the entire towing adjustment device, a large load, and a high power requirement for the propeller, which is not conducive to the adjustment flexibility of the towing system. Summary of the invention

[0004] The purpose of the present invention is to provide a buoyancy-regulated propulsion underwater deployment device and method in response to the defects of the prior art. A matching limit cylinder and buoyancy cylinder are arranged at the end of the shell. The buoyancy cylinder slides relative to the limit cylinder under the action of a driving element, thereby changing the volume of the buoyancy cylinder protruding from the shell to change the overall buoyancy, thereby achieving control of floating, sinking or floating. The buoyancy cylinder has a spherical crown surface facing the propeller impeller at one end. During the floating process, the spherical crown surface of the buoyancy cylinder is close to the impeller to guide the impeller's running wake, thereby improving the working efficiency of the propeller, thereby improving the efficiency of floating and tensioning, and meeting the need for rapid adjustment of the position of the sensor linear array.

[0005] The first object of the present invention is to provide a buoyancy-regulated propulsion underwater deployment device, which adopts the following scheme:

[0006] include:

[0007] The shell is in the shape of a capsule, and the end away from the connected cable is the shell end, and a conical frame is installed at the shell end;

[0008] The buoyancy adjustment assembly includes a buoyancy cylinder coaxially distributed with the shell, the buoyancy cylinder slidingly matches the shell, and the buoyancy cylinder is connected to a telescopic member. When the buoyancy cylinder is driven by the telescopic member, the volume of the buoyancy cylinder protruding out of the shell can be changed; one end of the buoyancy cylinder protruding out of the shell is a spherical crown surface;

[0009] A propeller is connected to the housing through a bracket so as to be arranged in the conical frame, and an impeller of the propeller faces the spherical crown surface;

[0010] The front hood is formed by fixing a skin on a conical frame, and is in a trumpet shape coaxial with the shell. The front hood is spaced apart from the end of the shell.

[0011] Furthermore, the spherical crown surface is a first guide surface, and the end of the shell is provided with a curved surface distributed around the buoyancy tube as a second guide surface. The spherical crown surface and the curved surface are coaxially distributed to form the guide surface of the impeller together.

[0012] Furthermore, the second flow-guiding surface is a partial spherical surface distributed around the buoyancy tube, and the radial outer edge of the second flow-guiding surface is flush with the outer circumferential wall of the shell.

[0013] Furthermore, a limiting cylinder is provided in the shell, one end of which is opened at the end of the shell, and the other end is blocked and matched with a telescopic part. The buoyancy cylinder and the limiting cylinder are coaxially distributed and form a sealed sliding fit.

[0014] Furthermore, a buoyancy cavity is formed inside the buoyancy cylinder, a pressure regulating cavity is formed between the buoyancy cylinder and the blocking end of the limiting cylinder, one end of the telescopic member is fixed to the limiting cylinder, and the other end passes through the pressure regulating cavity and is connected to the buoyancy cylinder.

[0015] Furthermore, a variable cross-section channel is formed inside the wind shield, the propeller blades are located in the variable cross-section channel, and the small diameter end of the variable cross-section channel faces the end of the shell.

[0016] Furthermore, an annular channel is formed between the inflow shield and the end of the shell, so that the wake of the blades can pass through under the guidance of the spherical crown surface.

[0017] Furthermore, a tension sensor connected to a cable is provided at one end of the shell, and a photoelectric slip ring is installed on the shell, and the cable is connected to the photoelectric slip ring.

[0018] The second object of the present invention is to provide a working method using the buoyancy-regulated propulsion-type underwater deployment device as described in the first object, comprising:

[0019] The front end of the shell is connected to the sensor array through a cable, and the headwater cover receives the action of water flow and combines the reverse thrust of the blades to tension the cable;

[0020] When the sensor array needs to float up, the telescopic member pushes the buoyancy tube to increase the volume protruding out of the shell, the propeller runs, and the wake formed by the blades is guided by the spherical crown surface of the buoyancy tube, so that the propeller can achieve synchronous tensioning of the cable during the floating process of the sensor array;

[0021] When the sensor array needs to sink, the telescopic member pulls the buoyancy tube to reduce the volume protruding from the shell, the propeller does not operate, and the sensor array and the shell dive using their own weight.

[0022] Furthermore, the wake formed by the propeller blades is discharged from the interval area between the headlight cover and the end of the shell. As the telescopic member pushes the buoyancy tube, the spherical crown surface approaches the blades, thereby increasing the guiding effect on the wake.

[0023] Compared with the prior art, the present invention has the following advantages and positive effects:

[0024] (1) In view of the low efficiency of thruster tensioning during the current buoyancy process, a matching limit cylinder and buoyancy cylinder are arranged at the end of the shell. The buoyancy cylinder slides relative to the limit cylinder under the action of the driving element, thereby changing the volume of the buoyancy cylinder protruding from the shell to change the overall buoyancy, thereby achieving control of buoyancy, sinking or floating. The end of the buoyancy cylinder facing the propeller is a spherical crown surface. During the buoyancy process, the spherical crown surface of the buoyancy cylinder is close to the impeller to guide the impeller's running wake, thereby improving the working efficiency of the propeller, thereby improving the efficiency of buoyancy and tensioning, and meeting the need for rapid adjustment of the position of the sensor linear array.

[0025] (2) The front cover is formed by partial skinning on a conical frame. A gap is left between the front cover and the shell for the propeller's wake to be discharged. Combined with the spherical cap on the buoy surface and the curved surface flow guide effect of the shell, the wake can be discharged smoothly, thereby improving the operating efficiency of the propeller.

[0026] (3) Generally, tensioning is required during the buoyancy process, and the buoyancy tube needs to be pushed out during buoyancy. After the buoyancy tube is pushed out, the restored spherical crown can be brought close to the propeller, thereby diverting the wake generated by the propeller, which can promote the working efficiency of the propeller during tensioning. The synergistic effect between the two can improve the efficiency of buoyancy.

[0027] (4) By improving the operating efficiency of the thruster, the power of the thruster can be reduced, and the noise of the thruster can also be reduced, which can reduce the noise interference to the sensor linear array detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0029] Figure 1 It is a schematic diagram of connecting the sensor linear array to the buoyancy-regulated propulsion underwater deployment device in Examples 1 and 2 of the present invention.

[0030] Figure 2 Schematic diagram of the buoyancy-regulated propulsion-type underwater deployment device in Examples 1 and 2 of the present invention.

[0031] Figure 3 Schematic diagram of the buoyancy cylinder and the limiting cylinder in Examples 1 and 2 of the present invention.

[0032] Figure 4 It is a schematic diagram of the process of depth adjustment of the buoyancy-regulated propulsion-type underwater deployment device in Examples 1 and 2 of the present invention.

[0033] Figure 5 It is a schematic diagram of the process of tension adjustment of the buoyancy-regulated propulsion-type underwater deployment device in Examples 1 and 2 of the present invention.

[0034] Among them, 1. optoelectronic slip ring, 2. tension sensor, 3. shell, 4. battery pack, 5. buoyancy adjustment component, 6. front cover, 7. skin, 8. thruster, 9. telescopic part, 10. underwater instrument cabin, 11. sensor linear array, 12. buoyancy adjustment propulsion underwater deployment device, 13. pressure regulating chamber, 14. buoyancy cylinder, 15. spherical crown surface, 16. limit cylinder, 17. second guide surface. DETAILED DESCRIPTION

[0035] Example 1

[0036] In a typical embodiment of the present invention, Figure 1-Figure 5 As shown, a buoyancy-regulated propulsion-type underwater deployment device is provided.

[0037] In view of the problem of low tensioning efficiency of the thruster 8 during the current buoyancy process, in the present embodiment, a buoyancy-regulated propulsion underwater deployment device 12 is provided, the main structure of which is a shell 3, and a matching limit cylinder 16 and a buoyancy cylinder 14 are arranged at the end of the shell 3. The buoyancy cylinder 14 slides relative to the limit cylinder 16 under the action of the driving element, thereby changing the volume of the buoyancy cylinder 14 protruding from the shell 3 to change the overall buoyancy, thereby achieving control of buoyancy, sinking or floating. In addition, a thruster 8 is installed outside the end of the device, and the end of the buoyancy cylinder 14 facing the impeller of the thruster 8 is a spherical crown surface 15. During the buoyancy process, the spherical crown surface 15 of the buoyancy cylinder 14 is close to the impeller to guide the impeller wake, thereby improving the working efficiency of the thruster 8, thereby improving the efficiency of buoyancy and tensioning, and meeting the demand for rapid adjustment of the position of the sensor linear array 11.

[0038] like Figure 2 As shown, the buoyancy-adjusting propulsion underwater deployment device 12 includes a shell 3, a buoyancy-adjusting assembly 5, a propeller 8 and a wind shield 6. The shell 3 adopts a capsule-shaped structure, and the end thereof away from the connected cable is the end of the shell 3. The buoyancy-adjusting assembly 5 is installed in the end of the shell 3. The end of the shell 3 is connected with a conical frame, and the propeller 8 is installed through the conical frame so that the propeller 8 is located outside the end of the shell 3. The skin 7 is fixed on the conical frame to form the wind shield 6. The shell 3 with a capsule-shaped structure can better withstand the underwater pressure. At the same time, the conical frame provides an installation basis for the telescopic member 9 and the skin 7. The capsule-shaped shell 3 ensures the stability of the device underwater and optimizes the water flow. In order to effectively control the buoyancy of the buoyancy-adjusting propulsion underwater deployment device 12 to achieve floating, sinking or floating. The buoyancy-adjusting assembly 5 is used, including a buoyancy cylinder 14 coaxially distributed with the shell 3, the buoyancy cylinder 14 slides with the shell 3, and is connected with the telescopic member 9. One end of the buoyancy cylinder 14 protruding from the shell 3 is a spherical crown surface 15. The buoyancy cylinder 14 is driven to move relative to the housing 3 by the telescopic member 9, and the buoyancy cylinder 14 can change the volume protruding outside the housing 3, thereby adjusting the overall buoyancy.

[0039] In order to achieve the effect of cooperating with the thruster 8 and the front cover 6 and reasonably guiding the water flow to improve the corresponding speed of the buoyancy-regulated propulsion underwater deployment device 12, in the present embodiment, one end of the buoyancy tube 14 protruding out of the shell 3 is in the form of a spherical crown surface 15, and the spherical crown surface 15 faces the thruster 8, and the impeller of the thruster 8 faces the spherical crown surface 15, so that the water flow generated by the impeller disturbance during the operation of the thruster 8 flows toward the spherical crown surface 15, and the spherical crown surface 15 guides the water flow generated during the operation of the thruster 8, so that the water flow is quickly discharged out of the device range, thereby improving the propulsion effect of the thruster 8.

[0040] In addition, the spherical crown surface 15 of the buoyancy tube 14 can reduce the resistance when the buoyancy tube 14 is pushed out of the shell 3. The sliding design of the buoyancy tube 14 and the structure of the spherical crown surface 15 make the buoyancy adjustment more accurate and efficient. By continuously pushing the buoyancy tube 14 out of the shell 3, the entire device gradually floats up. During the floating process, the spherical crown surface 15 at the end of the buoyancy tube 14 is also close to the impeller of the propeller 8, which helps to guide the wake and improve the working efficiency of the propeller 8.

[0041] like Figure 2As shown, the propeller 8 is connected to the inside of the shell 3 through a bracket as a driving element and arranged in the conical skeleton, and its impeller faces the spherical crown surface 15 of the buoyancy tube 14. The wake generated by the impeller can directly act on the spherical crown surface 15, thereby guiding the water flow and improving efficiency. Specifically, the spherical crown surface 15, as a streamlined design, has good flow-guiding performance. When the water flow encounters the spherical crown surface 15, it will flow smoothly along its curved surface, reducing the generation of eddies and turbulence, thereby achieving effective guidance of the water flow. The spherical crown surface 15 is designed to face the impeller of the propeller 8, so that the water flow generated by the propeller 8 can flow directly and efficiently to the spherical crown surface 15. The spherical crown surface 15 guides the water flow and quickly discharges it to the outside of the device through its shape and position advantages, thereby achieving effective control of the water flow. The telescopic member 9 provides the necessary power for buoyancy adjustment, and the matching design of the impeller and the spherical crown surface 15 improves the working efficiency of the propeller 8, thereby enhancing the efficiency of floating and tensioning.

[0042] like Figure 1 and Figure 2 As shown, the flow cover 6 is formed by fixing the skin 7 to the conical frame, and is in the shape of a trumpet coaxial with the shell 3, and is spaced apart from the end of the shell 3. The water flow can smoothly enter the device through the flow cover 6, while reducing the water flow resistance. The optimized design of the flow cover 6 reduces the resistance of the device in the water and improves the underwater operation efficiency and stability. The buoyancy-regulated propulsion underwater deployment device 12 achieves precise buoyancy regulation, efficient power drive and optimized water flow through the structural design and optimized functional configuration, meeting the needs of quickly adjusting the position of the sensor linear array 11.

[0043] In addition, the inflow hood 6 and the end of the shell 3 are spaced apart, and the spaced apart positions form an outlet for discharging the water flow in the propeller 8 out of the inner circle of the inflow hood 6. The water flow generated by the operation of the impeller of the propeller 8 is guided by the spherical crown surface 15. The water flow flows outward along the spherical crown surface 15, passes through the spaced position between the inflow hood 6 and the shell 3, and is discharged outside the device range, thereby reducing backflow and turbulence and improving the operating efficiency of the impeller of the propeller 8.

[0044] like Figure 2 As shown, the spherical crown surface 15 is the first flow-guiding surface, and the end of the shell 3 is provided with a curved surface distributed around the buoyancy cylinder 14, which is a partial spherical surface and serves as the second flow-guiding surface 17. The second flow-guiding surface 17 is distributed around the buoyancy cylinder 14, and the spherical crown surface 15 and the curved surface are coaxially distributed to form the flow-guiding surface of the impeller. In addition, the radial outer edge of the second flow-guiding surface 17 is flush with the outer circumferential wall of the shell 3.

[0045] It should be noted that the spherical crown surface 15, as the first flow guide surface, first receives and guides the water flow generated by the impeller disturbance of the propeller 8. The water flow is guided by the spherical crown surface 15 and flows smoothly along the spherical crown surface 15, reducing the formation of eddy currents and turbulence. Subsequently, these initially guided water flows enter the second flow guide surface 17. Since the second flow guide surface 17 is distributed around the buoyancy cylinder 14 and is coaxial with the spherical crown surface 15, it can seamlessly receive the water flow from the first flow guide surface and continue to guide it.

[0046] As a partial spherical surface, the second guide surface 17 not only continues the guide function of the first guide surface, but also enhances the stability and efficiency of the entire guide surface through its distribution around the buoyancy tube 14. The surrounding design of the second guide surface 17 helps to distribute the water flow more evenly around the device, reducing the impact and resistance of the water flow on the device.

[0047] Through the cooperation of the first guide surface and the second guide surface 17, the water flow is guided to a more optimized path, on which the interference of the water flow on the device can be minimized, the working efficiency of the propeller 8 is improved, and the stability and controllability of the device in the water are improved.

[0048] like Figure 3 As shown, in order to enable a stable relative movement between the shell 3 and the buoyancy cylinder 14, a limiting cylinder 16 adapted to the buoyancy cylinder 14 is provided in the shell 3. Specifically, a limiting cylinder 16 is provided in the shell 3, and the limiting cylinder 16 is a cylindrical structure with one end blocked. One end of the limiting cylinder 16 is opened and distributed at the end of the shell 3, flush with the end surface of the shell 3, and the other end of the limiting cylinder 16 extends into the shell 3 to form a blocked end and is matched with a telescopic member 9, which serves as a fixed position of the telescopic member 9. The buoyancy cylinder 14 and the limiting cylinder 16 are coaxially distributed and form a sealed sliding match.

[0049] A buoyancy cavity is formed inside the buoyancy cylinder 14, and a pressure regulating cavity 13 is formed between the sealing ends of the buoyancy cylinder 14 and the limiting cylinder 16. The pressure regulating cavity 13 is isolated from the outside by the sealed sliding position of the buoyancy cylinder 14 and the limiting cylinder 16. One end of the telescopic member 9 is fixed to the limiting cylinder 16, and the other end passes through the pressure regulating cavity 13 and is connected to the buoyancy cylinder 14.

[0050] When the telescopic member 9 is extended and retracted, the buoyancy cylinder 14 is driven to move relative to the limiting cylinder 16, so that the volume of the buoyancy cylinder 14 protruding from the limiting cylinder 16 changes, and the volume of the buoyancy cylinder 14 protruding from the shell 3 also changes. The volume change of the pressure regulating chamber 13 is proportional to the volume change of the buoyancy cylinder 14 protruding from the shell 3. When the volume of the buoyancy cylinder 14 protruding from the shell 3 increases, the volume of the pressure regulating chamber 13 also increases.

[0051] In this embodiment, the telescopic member 9 can be a push rod motor, a cylinder, an oil cylinder, a linear motor, etc. In order to facilitate the control of the buoyancy adjustment propulsion type underwater deployment device 12, a push rod motor is used to achieve axial telescopic action.

[0052] like Figure 2 As shown, a variable cross-section channel is formed inside the wind shield 6, and the blades of the propeller 8 are located in the variable cross-section channel. The small diameter end of the variable cross-section channel faces the end of the shell 3, and an annular channel is formed between the wind shield 6 and the end of the shell 3 for the blade wake to pass through under the guidance of the spherical crown surface 15, and the blade wake is discharged to the outside of the wind shield 6 and the shell 3, providing sufficient reaction force for the propeller 8 to drive the shell 3 to move, thereby meeting the underwater deployment requirements.

[0053] like Figure 2 and Figure 3 As shown, the size of the buoyancy-adjusting propulsion underwater deployment device 12 can be 2m in total length, 1m in maximum cross-sectional diameter, and about 300kg in total weight. A tension sensor 2 and an optoelectronic slip ring 1 are provided at the front end of the shell 3 of the buoyancy-adjusting propulsion underwater deployment device 12. The tension sensor 2, the battery pack 4, and the buoyancy-adjusting device are fixed in the shell 3; the optoelectronic slip ring 1 is located in front of the pressure-resistant cylinder; the buoyancy-adjusting assembly 5 is located at the end of the shell 3; the wind shield 6 is installed at the end of the shell 3, and the conical frame of the wind shield 6 is fixed on the shell 3; the thruster 8 is installed on the conical frame of the wind shield 6. Among them, the working sea depth of the buoyancy-adjusting propulsion underwater deployment device 12 is preferably 200m.

[0054] The optoelectronic slip ring 1 can connect the communication cable of the sensor array 11 and the buoyancy-adjusting propulsion underwater deployment device 12, ensuring that during the deployment and testing process, the sensor array 11 will not be greatly twisted with the rotation of the buoyancy-adjusting propulsion underwater deployment device 12, thereby affecting the performance or damage. The rotor part of the optoelectronic slip ring 1 is connected to the base array connector, and the stator part is connected to the tension sensor 2 through the watertight penetration.

[0055] The tension sensor 2 is mainly used to test the tension value between the sensor array 11 and the buoyancy-adjusting propulsion underwater deployment device 12, and is used to determine whether the propeller 8 is started. The tension sensor 2 is a non-watertight electrical device. A head is provided at the front end of the shell 3. The tension sensor 2 is installed in the head at the front end of the shell 3. One end of the tension sensor 2 is connected to the main structure of the shell 3, and the other end is connected to the tail end of the sensor array 11 through an extension shaft. The extension shaft and the main structure of the shell 3 are connected by a piston dynamic seal to ensure the watertightness of the shell 3. The breaking tension of the cable in the sensor array 11 is 10kN, and the range selected by the tension sensor 2 is 10kN.

[0056] The battery pack 4, tension sensor 2, control circuit board, etc. are installed inside the shell 3 to provide pressure resistance support for the internal electrical equipment. The outer dimensions of the shell 3 are a total length of 800mm and an outer diameter of 500mm. The material is stainless steel 316L, and the wall thickness of the shell 3 is 10mm. As a pressure-resistant cylinder structure, the shell 3 has a working pressure of not less than 1.5MPa. During the design, the pressure resistance of the pressure cylinder is checked according to the working pressure of 1.5MPa. The theoretical calculation formula refers to the "Pressure Vessel Design Manual" written by Dong Daqin and GB / T150.1~150.4-2011 "Pressure Vessel". In this embodiment, the shell 3 is made of 316L, the allowable stress of the material [σ] = 137MPa, and the yield stress σs = 205MPa.

[0057] The strength verification process of shell 3 is as follows:

[0058] 1. Shell 3

[0059] (1) Pressure test stress verification

[0060] The outer diameter of the shell 3 is Do=500mm, the thickness is δ=10mm, and the calculated length is 800mm. The shell 3 is formed by rolling and welding of pipes or plates. The welding joint coefficient φ in the calculation is 0.9, and the calculated pressure pc=1.5MPa.

[0061] The stress calculation formula of shell 3 under pressure test is:

[0062]

[0063] Meet the requirements of pressure test stress verification.

[0064] (2) Shell 3 stability check

[0065] Refer to GB / T150.3-2011 "Pressure Vessels Part 3: Design" to check the stability of shell 3.

[0066] Do / δ=32.5≥20

[0067] 1) Determine the external pressure strain coefficient A

[0068] Check the chart and get A=0.0016756

[0069] 2) Determine the external pressure stress coefficient B

[0070] Check the chart and get B = 105.84

[0071] Then the allowable external pressure calculation formula for Do / δ≥20 is applied:

[0072] Satisfy the stability check of shell 3.

[0073] 2. Shell 3 head stability check

[0074] Refer to GB / T150.3-2011 "Pressure Vessels Part 3: Design" to check the stability of shell 3 head.

[0075] 1) Determine the external pressure strain coefficient A

[0076] Refer to the chart, according to D o / 2h o＝ 2.006, check the chart and get K1=1.0227

[0077]

[0078] 2) Determine the external pressure stress coefficient B

[0079] Check the chart and get B = 109.73

[0080] Calculation formula for the allowable external pressure of external pressure elliptical head:

[0081]

[0082] Satisfy the stability check of shell 3.

[0083] The battery pack 4 provides power for the operation of the unfolding device. The battery pack 4 has an outer shape of 470 mm and a thickness of 254 mm. Semi-industrial slides are installed on both sides of the battery pack 4, which are connected to the preset slides inside the housing 3 and fixed with screws. The battery capacity is 9.6 Kw·h. According to the output power of the propeller 8600w, the propeller 8 can work continuously for about 16 hours. The total weight of the battery pack 4 is about 55 kg.

[0084] The main function of the conical skeleton of the oncoming hood 6 is to generate fluid resistance under the action of water flow to pull the sensor linear array 11 to unfold. A layer of nylon skin 7 is fastened to the outside of the oncoming hood 6 to increase the oncoming area. Its appearance is a trumpet-shaped frustum frame structure, and its center line is coaxial with the shell 3 and the propeller 8. The overall weight of the conical skeleton of the oncoming hood 6 is about 23 kg.

[0085] like Figure 3 As shown, a piston dynamic seal is adopted between the buoyancy cylinder 14 and the housing 3. The buoyancy cylinder 14 increases or decreases the buoyancy for the buoyancy adjustment propulsion underwater deployment device 12 during the extension or retraction process. A lip-shaped skeleton seal is added between the buoyancy cylinder 14 and the housing 3 to eliminate marine attachments adhering to the buoyancy cylinder 14 during the extension or retraction process. A piston dynamic seal is adopted between the buoyancy cylinder 14 and the limit cylinder 16. The buoyancy adjustment amount that the buoyancy cylinder 14 can provide is about 120N. The overall weight of the buoyancy adjustment assembly 5 is about 45kg.

[0086] The main function of the propeller 8 is to generate thrust to pull the sensor linear array 11 straight. When the flow rate is large, the propeller 8 is in a low-power standby state. The propeller 8 is installed on the front surface frame and connected to the housing 3 through a watertight connector. The battery pack 4 in the housing 3 supplies power to it. The propeller 8 is set to have a power of 600w when propulsing. It is sealed by a zero-leakage magnetic coupling rotary seal structure and driven by a built-in driver. The total weight of the propeller 8 is about 2.6kg.

[0087] The working principle of the buoyancy-regulated propulsion underwater deployment device 12 is as follows: after the buoyancy-regulated propulsion underwater deployment device 12 is deployed, the propeller 8 of the buoyancy-regulated propulsion underwater deployment device 12 is started, and under the cooperation of the resistance and thrust generated by the front hood 6 and the propeller 8 respectively, the sensor linear array 11 is pulled to be fully deployed and maintained in a horizontal state.

[0088] Example 2

[0089] In another typical embodiment of the present invention, Figure 1-Figure 5 As shown, a working method of a propulsion-type underwater deployment device utilizing buoyancy regulation is provided.

[0090] Using the buoyancy regulating propulsion type underwater deployment device 12 as in Example 1, Figure 1-Figure 5 As shown, the following steps are included:

[0091] The head end of the shell 3 is connected to the sensor linear array 11 through a cable, and the flow cover 6 receives the action of the water flow and combines the reverse thrust of the blades to tension the cable;

[0092] When the sensor array 11 needs to float, the telescopic member 9 pushes the buoyancy tube 14 to increase the volume protruding out of the housing 3, and the propeller 8 operates. The wake formed by the blades is guided by the spherical crown surface 15 of the buoyancy tube 14, so that the propeller 8 can achieve synchronous tensioning of the cable during the floating process of the sensor array 11;

[0093] When the sensor array 11 needs to sink, the telescopic member 9 pulls the buoyancy tube 14 to reduce the volume protruding outside the shell 3, the propeller 8 does not operate, and the sensor array 11 and the shell 3 dive by their own weight.

[0094] The wake formed by the propeller 8 blades is discharged from the interval area between the headlight cover 6 and the end of the shell 3. As the telescopic member 9 pushes the buoyancy tube 14, the spherical crown surface 15 approaches the blades, thereby increasing the guiding effect on the wake.

[0095] like Figure 4 Combination Figure 5 As shown, the overall use process of the buoyancy-adjusting propulsion-type underwater deployment device 12 is as follows:

[0096] During the test, the sensor array 11 of the underwater instrument cabin 10 is connected to the buoyancy-adjusting propulsion-type underwater deployment device 12, and the tension sensor 2 is connected to the sensor array 11 to monitor the tension between the sensor array 11 and the buoyancy-adjusting propulsion-type underwater deployment device 12. When the flow rate of the water flow is low or there is no flow, the value measured by the tension sensor 2 will be less than the set value, and the propeller 8 will start to provide tension for the straightening of the sensor array 11; when the flow rate is high, the wind shield 6 will provide a large tension, and the value measured by the tension sensor 2 will be greater than the set value, and the propeller 8 will be in a standby state.

[0097] During the test, the buoyancy adjustment component 5 is mainly used for underwater positioning of the buoyancy adjustment propulsion type underwater deployment device 12 and compensating the buoyancy of the sensor linear array 11, so as to maintain the horizontal posture of the sensor linear array 11. The buoyancy adjustment component 5 can adjust its own buoyancy through its own volume according to the depth information of each node in the buoyancy adjustment propulsion type underwater deployment device 12 and the sensor linear array 11, thereby adjusting its own depth to meet the system's requirements for each depth posture of the sensor linear array 11.

[0098] The specific implementation process is that after the sensor linear array 11 and the buoyancy-regulated propulsion type underwater deployment device 12 are deployed, the control module in the buoyancy-regulated propulsion type underwater deployment device 12 compares and analyzes the depth value of the head end of the sensor linear array 11 and the depth value of the buoyancy-regulated propulsion type underwater deployment device 12. If the depth values ​​of the two are different, it is necessary to adjust the buoyancy adjustment component 5 of the buoyancy-regulated propulsion type underwater deployment device 12. By changing the depth of the buoyancy adjustment component 5, the deviation of the head and tail ends of the sensor linear array 11 on the longitudinal plane meets the test requirements.

[0099] After the test is completed, the buoyancy-adjusting propulsion type underwater deployment device 12 and the sensor linear array 11 need to be recovered. The buoyancy-adjusting assembly 5 can be used to position the buoyancy-adjusting propulsion type underwater deployment device 12. After the test is completed, the buoyancy-adjusting mechanism of the buoyancy-adjusting propulsion type underwater deployment device 12 adjusts the system buoyancy to the maximum buoyancy to ensure that the entire buoyancy-adjusting propulsion type underwater deployment device 12 has a larger visible area when it floats out of the water, which is convenient for recovery.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A buoyancy-adjusted propulsion underwater deployment device, characterized in that: include: The shell is in the shape of a capsule, and the end away from the connected cable is the shell end, and a conical frame is installed at the shell end; The buoyancy adjustment assembly includes a buoyancy cylinder coaxially distributed with the shell, the buoyancy cylinder slidably matches the shell, and is connected to a telescopic member. When the buoyancy cylinder is driven by the telescopic member, the volume of the buoyancy cylinder protruding out of the shell can be changed; one end of the buoyancy cylinder protruding out of the shell presents a spherical crown surface; a propeller is connected to the shell through a bracket to be arranged in a conical frame, and the impeller of the propeller faces the spherical crown surface; The front hood is formed by fixing a skin on a conical frame, and is in a trumpet shape coaxial with the shell. The front hood is spaced apart from the end of the shell.

2. The buoyancy-adjusting propulsion underwater deployment device according to claim 1, characterized in that: The spherical crown surface is the first guide surface, and the end of the shell is provided with a curved surface distributed around the buoyancy tube as the second guide surface. The spherical crown surface and the curved surface are coaxially distributed to form the guide surface of the impeller together.

3. The buoyancy-adjusting propulsion underwater deployment device according to claim 2, characterized in that: The second flow-guiding surface is a partial spherical surface distributed around the buoyancy tube, and the radial outer edge of the second flow-guiding surface is flush with the outer circumferential wall of the shell.

4. The buoyancy-adjusting propulsion underwater deployment device according to claim 1, characterized in that: A limiting cylinder is arranged in the shell, one end of which is opened at the end of the shell, and the other end is blocked and matched with a telescopic member. The buoyancy cylinder and the limiting cylinder are coaxially distributed and form a sealed sliding match.

5. The buoyancy-adjusting propulsion-type underwater deployment device according to claim 4, characterized in that: A buoyancy cavity is formed inside the buoyancy cylinder, a pressure regulating cavity is formed between the buoyancy cylinder and the blocking end of the limiting cylinder, one end of the telescopic member is fixed to the limiting cylinder, and the other end passes through the pressure regulating cavity and is connected to the buoyancy cylinder.

6. The buoyancy-adjusting propulsion-type underwater deployment device according to claim 1, characterized in that: A variable cross-section channel is formed inside the wind shield, and the propeller blades are located in the variable cross-section channel. The small diameter end of the variable cross-section channel faces the end of the shell.

7. The buoyancy-adjusting propulsion underwater deployment device according to claim 1, characterized in that: An annular channel is formed between the inflow shroud and the end of the shell, so that the wake of the blades can pass through under the guidance of the spherical crown surface.

8. The buoyancy-adjusting propulsion-type underwater deployment device according to claim 1, characterized in that: A tension sensor connected to a cable is provided at one end of the shell, and a photoelectric slip ring is installed on the shell, and the cable is connected to the photoelectric slip ring.

9. A method for operating the buoyancy-regulated propulsion underwater deployment device according to any one of claims 1 to 8, characterized in that: include: The front end of the shell is connected to the sensor array through a cable, and the headwater cover receives the action of water flow and combines the reverse thrust of the blades to tension the cable; When the sensor array needs to float up, the telescopic member pushes the buoyancy tube to increase the volume protruding from the shell, the propeller runs, and the wake formed by the blades is guided by the spherical crown surface of the buoyancy tube, so that the propeller can achieve synchronous tensioning of the cable during the floating process of the sensor array; when the sensor array needs to sink, the telescopic member pulls the buoyancy tube to reduce the volume protruding from the shell, the propeller does not run, and the sensor array and the shell dive by their own weight.

10. The working method of the buoyancy-adjusting propulsion-type underwater deployment device according to claim 9, characterized in that: The wake formed by the propeller blades is discharged from the interval area between the headlight cover and the end of the shell. As the telescopic member pushes the buoyancy tube, the spherical crown surface approaches the blades, thereby increasing the guiding effect on the wake.

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