Stepped self-adapting high-pressure dynamic seal turntable device

Abstract

The application discloses a stepped self-adaptive high-pressure dynamic sealing rotating table device, relates to the technical field of underwater radar rotating table, and can be switched between underwater radar deep water operation and water surface presetting, and can realize the deep water operation of the underwater radar rotating table without leakage. The stepped self-adaptive high-pressure dynamic sealing rotating table device comprises a mechanical sealing ring 1, a mechanical sealing ring 2, a mechanical sealing ring n, an oil injection nozzle, viscous pressure oil, an azimuth transmission device, liquid leakage detection and discharge, a rotary joint and the like. The application has the following advantages: 1) the sealing pressure difference can be improved, and the underwater working depth of the radar rotating table is significantly increased; 2) the sealing pressure difference is positively correlated with the number of the multilayer mechanical sealing rings, and the more the number of the rings, the higher the pressure difference; 3) the pressure difference can be stepped and self-adaptively distributed to each mechanical sealing ring; 4) the outer auxiliary dynamic sealing is increased, and the reliability of the whole machine sealing is improved; and 5) the liquid leakage information and the liquid leakage discharge can be monitored.

Description

Technical Field

[0001] This invention belongs to the field of radar turntable transmission technology, and in particular relates to a stepped adaptive high-pressure dynamic sealing underwater turntable device. Background Technology

[0002] The underwater radar turntable can adapt to switching between leak-proof underwater operation and surface operation, and the dynamic sealing device can ensure that the underwater radar turntable is leak-proof. Currently, underwater radar turntables mainly use two sealing methods: one is a radial dynamic seal using O-rings. The disadvantage of this method is that it is prone to wear and failure at high speeds, and the O-rings are susceptible to corrosion when in contact with water. The advantage is its simple structure. The second method uses a single-layer mechanical seal. The disadvantage of this method is its small sealing pressure differential, which makes it unsuitable for deep water conditions. The advantage is its high reliability.

[0003] Existing underwater radar turntables have the following shortcomings: 1. The seals are prone to wear and corrosion, resulting in a short lifespan; 2. They have low pressure resistance and shallow underwater operating depth. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a stepped adaptive high-pressure dynamic sealing turntable device, which enables underwater radar turntables to operate in deep water without leakage.

[0005] To achieve the objectives of this invention, a stepped adaptive high-pressure dynamic sealing turntable device is disclosed, comprising: a multi-layer sealing ring, a directional transmission device, a base, a rotating column, a base, a leakage discharge pipe, a leakage detection device, a cover plate, a sealing ring, and a rotating joint. The stationary ring of the multi-layer sealing ring is installed by fitting the end cap stop, sealing ring, and screws with the outer flange stop of the base, using a hole-based clearance fit. The dynamic ring of the multi-layer sealing ring is installed by fitting the inner stop of the turntable, sealant, and screws with the outer stop of the rotating column, also using a hole-based clearance fit. The directional transmission device is installed by fitting the outer ring stop of the slewing bearing with the inner stop of the base, using a shaft-based clearance fit. The directional transmission device is also installed by fitting the outer stop of the inner ring of the slewing bearing with the inner stop of the rotating column, using a shaft-based clearance fit. The base is installed on the base from below by a sealing ring and screws, forming a high-pressure resistant static seal. The base features a recessed input / output transition area in the center, housing a high-pressure watertight connector, a leak drain connector, and hydraulic motor supply and return ports. The end cap is designed with a high cylindrical water-blocking feature to prevent leakage from the multi-layer sealing rings from flowing around the source. The end cap includes a leak drain channel and a threaded drain port. The leak drain channel is formed using a casting process combined with a pressure plate and sealing gasket. The threaded drain port connects to a leak drain pipe, allowing leakage to flow along the channel and exit the high-pressure dynamic sealing turntable. A cylindrical hole at the top of the base facilitates the passage of the leak drain pipe, draining leakage from the multi-layer sealing rings to the outside of the high-pressure dynamic sealing turntable. The cover plate is mounted on the upper part of the dynamic ring turntable of the multi-layer sealing rings using a sealing ring and screws, forming a high-pressure static seal. A leak detection device is installed inside the base cavity, enabling real-time monitoring of leak information and transmitting this information to the high-pressure dynamic sealing turntable via the high-pressure watertight connector in the transition area.

[0006] Further, the multi-layer sealing ring includes a mechanical sealing ring, a dynamic seal, a static seal, an oil injection nozzle, viscous pressure oil, an end cover, a static ring support, and a turntable. The mechanical sealing rings include, layer by layer from the inside to the outside, a first-layer mechanical sealing ring, a second-layer mechanical sealing ring, a third-layer mechanical sealing ring, up to an n-th-layer mechanical sealing ring, where n is a natural number greater than 3. The static ring of the first-layer mechanical sealing ring is mounted on the end cover, the static rings of the remaining n-1 mechanical sealing rings are mounted on the static ring support, and the static ring support is mounted on the end cover through the static seal and screws. The n dynamic rings of the mechanical sealing rings and the turntable realize high-pressure static sealing in the radial direction through sealing rings, and radial positioning is performed by using a spigot. The turntable is designed and installed with a shifting post, which is embedded in the n bayonets of the dynamic rings of the mechanical sealing rings, and drives the n dynamic rings of the mechanical sealing rings to rotate along with the turntable. An outer-layer dynamic seal is additionally installed between the static ring support and the turntable for auxiliary sealing, so as to improve the sealing reliability of the whole machine. The turntable is designed with n oil injection nozzles and n oil injection holes, and the viscous pressure oil is high-viscosity hydraulic oil and fills the sealing cavity; the pressure resistance of a single mechanical sealing ring is P, and the pressure resistance of n mechanical sealing rings is n*P; when the external ambient pressure is P0, and P < P0 < i*P, where 0 < i < n, the multi-layer sealing ring will perform stepwise adaptive pressure distribution, that is, from the outside to the inside, the pressure resistance of each of the n-th layer to the n-i+2-th layer of the mechanical sealing rings is P, the actual bearing pressure of the n-i+1-th layer is i*P - P0, and the actual bearing pressure of the remaining n-i layers is 0.

[0007] Further, the azimuth transmission device includes a slewing bearing, a pinion, a motor, and a self-aligning spindle. The motor is mounted on the base through the self-aligning spindle, the pinion is mounted on the output shaft of the motor, and the pinion meshes with the inner gear ring of the slewing bearing; the motor drives the inner ring of the slewing bearing to rotate through the pinion.

[0008] Further, the rotary joint includes one or more medium rotary transmission devices among a microwave hinge, an optical hinge, an electric slip ring, and a water hinge, and is coaxially installed with the multi-layer sealing ring and the azimuth transmission device; the rotary joint is coaxially integrated with an angle measuring device, which can collect the angular position information of the azimuth transmission device in real time, and transmit the angular position information out of the high-pressure dynamic sealing turntable device through the high-pressure resistant watertight connector in the transition zone.

[0009] Compared with the prior art, the significant advancements of this invention are as follows: 1) The use of a stepped adaptive high-pressure dynamic seal instead of an O-ring dynamic seal can avoid O-ring wear and corrosion leading to sealing failure; 2) The use of a stepped adaptive high-pressure dynamic seal instead of a single-layer mechanical seal can improve the overall sealing pressure difference and significantly increase the underwater working depth of the radar turntable; 3) The sealing pressure difference of this device is related to the number of multi-layer mechanical seal rings; the more sealing rings, the higher the sealing pressure. By appropriately setting the number of sealing rings, the underwater working pressure of the existing radar turntable can be increased from 6MPa to 24MPa; 4) The sealing rings of this device can distribute the pressure difference to each layer of mechanical seal rings in a stepped and adaptive manner, ensuring that each layer of sealing rings does not overload; 5) The addition of an outer dynamic seal for auxiliary sealing improves the overall sealing reliability; 6) It can monitor leakage information in real time and transmit the leakage information to the high-pressure dynamic seal turntable device through the high-pressure watertight connector in the transfer area; 7) The leakage discharge channel and leakage discharge pipe allow leakage to be discharged outside the high-pressure dynamic seal turntable device. Attached Figure Description

[0010] Figure 1 A schematic diagram of the stepped adaptive high-pressure dynamic sealing turntable device according to an embodiment of the present invention.

[0011] Figure 2 A diagram illustrating the composition of the multilayer sealing ring in an embodiment of the present invention.

[0012] Figure 3 A diagram illustrating the composition of the orientation transmission device according to an embodiment of the present invention.

[0013] Figure 4 A schematic diagram of the leakage discharge channel and leakage discharge pipe according to an embodiment of the present invention.

[0014] Figure 5 A schematic diagram of the external input / output switching area in an embodiment of the present invention.

[0015] Wherein: 1—Multi-layer sealing ring, 2—Orientation transmission device, 3—Base, 4—Rotating column, 5—Base, 5-1—High-pressure watertight connector, 5-2—Leakage drainage water connector, 5-3—Hydraulic motor oil supply port, 5-4—Oil return port, 6—Leakage drainage pipe, 7—Leakage detection device, 8—Cover plate, 9—Sealing ring, 10—Rotating joint, 11—Mechanical seal ring, 11-1—First layer mechanical seal ring, 11-2—Second layer mechanical seal ring, 11- 3—Third layer mechanical seal ring, 11-n—nth layer mechanical seal ring, 12—Dynamic seal, 13—Static seal, 14—Oil injection nozzle, 15—Viscous pressure oil, 16—End cap, 16-1—High cylindrical water-blocking feature, 16-2—Leakage discharge channel, 16-3—Threaded drain port, 17—Static ring bracket, 18—Turntable, 18-1—Pulley, 18-2—Oil injection hole, 21—Slewing bearing, 22—Pin gear, 23—Motor, 24—Self-aligning spindle. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] like Figure 1 As shown, a stepped adaptive high-pressure dynamic sealing turntable device includes a multi-layer sealing ring 1, an orientation transmission device 2, a base 3, a rotating column 4, a base 5, a leakage discharge pipe 6, a leakage detection device 7, a cover plate 8, a sealing ring 9, and a rotating joint 10.

[0018] like Figure 1 , Figure 2 As shown, when installing the fixed part of the multi-layer sealing ring 1, a sealing ring 9 is added to the sealing groove and tightened with screws to form a high-pressure resistant static seal; the end cap 16 of the multi-layer sealing ring 1 is designed with an outer cylindrical positioning stop, with a positioning accuracy of not less than level 7; the base 3 that is installed in conjunction with it is designed with an inner cylindrical positioning stop, with a positioning accuracy of not less than level 7; the basic hole system clearance fit installation is adopted, and after mutual cooperation, the fixed part of the multi-layer sealing ring 1 can be accurately positioned and installed.

[0019] like Figure 1 , Figure 2 As shown, when installing the rotating part of the multi-layer sealing ring 1, sealant is applied to the mounting surface and screws are tightened to form an auxiliary static seal. The turntable 18 of the multi-layer sealing ring 1 is designed with an inner cylindrical positioning stop, and the positioning accuracy is not less than level 7. The rotating column 4 installed in conjunction with it is designed with an outer cylindrical positioning stop, and the positioning accuracy is not less than level 7. The hole-based clearance fit is used for installation. After mutual cooperation, the rotating part of the multi-layer sealing ring 1 can be accurately positioned and installed.

[0020] like Figure 1 , Figure 3 As shown, the outer ring of the slewing bearing 21 of the azimuth transmission device 2 is designed with an outer cylindrical positioning stop, and the positioning accuracy is not less than level 7; the base 3 that is installed in conjunction with it is designed with an inner cylindrical positioning stop, and the positioning accuracy is not less than level 7; the basic shaft system clearance fit installation is adopted, and after mutual cooperation, the fixed part of the azimuth transmission device 2 can be accurately positioned and installed.

[0021] like Figure 1 , Figure 3 As shown, the inner ring of the slewing bearing 21 of the azimuth transmission device 2 is designed with an outer cylindrical positioning stop, and the positioning accuracy is not less than level 7; the rotating column 4 installed in conjunction with it is designed with an inner cylindrical positioning stop, and the positioning accuracy is not less than level 7; the basic shaft system clearance fit installation is adopted, and after mutual cooperation, the rotating part of the azimuth transmission device 2 can be accurately positioned and installed.

[0022] like Figure 1 As shown, the base 5 is mounted on the base 3 from below by a sealing ring 9 and screws, forming a high-pressure resistant static seal.

[0023] like Figure 1 , Figure 5 As shown, the base 5 has a recessed input / output transition area in the middle. The transition area is equipped with a high-pressure watertight connector 5-1, a leakage drain connector 5-2, a hydraulic motor oil supply port 5-3, and an oil return port 5-4.

[0024] like Figure 1 , Figure 4 As shown, the end cap 16 is designed with a high cylindrical water-blocking feature 16-1, which can prevent leakage from the multi-layer sealing ring 1 from flowing around.

[0025] like Figure 1 , Figure 4 As shown, the end cap 16 is designed with a leakage discharge channel 16-2 and a threaded drain port 16-3; a vertical leakage hole is designed at the high cylindrical water-blocking feature 16-1 of the end cap 16 to facilitate the flow of leakage to the leakage hole; the leakage discharge channel 16-2 is designed at the bottom of the end cap 16 where it connects to the vertical leakage hole, and the leakage discharge channel 16-2 is sealed by a pressure plate combined with a sealing gasket to form a sealed leakage cavity; the threaded drain port 16-3 is designed at the bottom of the end cap 16 where it connects to the leakage discharge channel 16-2, and the threaded drain port 16-3 is made of pipe thread to facilitate connection and sealing, and is tightened to the pipe thread of the leakage discharge pipe 6; the whole forms a relatively sealed leakage discharge channel, so that the leakage enters the leakage discharge pipe 6 along the leakage discharge channel 16-2 and is discharged outside the high-pressure dynamic sealing turntable device.

[0026] like Figure 1As shown, a cylindrical hole is provided at the upper end of the base 3 to facilitate the passage of the leakage discharge pipe 6, so that the leakage from the multi-layer sealing ring 1 can be discharged outside the high-pressure dynamic sealing turntable device.

[0027] like Figure 1 , Figure 2 As shown, the cover plate 8 is installed on the upper part of the turntable 18 of the multi-layer sealing ring 1 by the sealing ring 9 and screws to form a high-pressure resistant static seal.

[0028] like Figure 1 , Figure 5 As shown, the leakage detection device 7 is installed in the cavity of the base 3. The leakage sensor built into it can monitor the leakage information in real time and transmit the leakage information to the high-pressure dynamic sealing turntable device through the high-pressure watertight connector 5-1 in the transfer area.

[0029] like Figure 1 , Figure 2 As shown, the multi-layer sealing ring 1 includes a mechanical sealing ring 11, a dynamic seal 12, a static seal 13, an oil injection nozzle 14, viscous pressure oil 15, an end cap 16, a static ring bracket 17, and a turntable 18.

[0030] like Figure 1 , Figure 2 As shown, the mechanical seal ring 11 includes, from the inside out, the first layer of mechanical seal ring 11-1, the second layer of mechanical seal ring 11-2, the third layer of mechanical seal ring 11-3, and so on up to the nth layer of mechanical seal ring 11-n, where n is a natural number greater than 3.

[0031] like Figure 1 , Figure 2 As shown, the stationary ring of the first layer mechanical seal ring 11-1 is designed with an inner cylindrical positioning stop, and the positioning accuracy is not less than grade 7; the end cover 16 that is installed in conjunction with it is designed with an outer cylindrical positioning stop, and the positioning accuracy is not less than grade 7; the clearance fit installation is adopted with a hole-based system, and after mutual mating, it is fixed with a set screw, which can accurately position and install the stationary ring of the first layer mechanical seal ring 11-1.

[0032] like Figure 1 , Figure 2 As shown, except for the first layer mechanical seal ring 11-1, the stationary rings of the remaining n-1 mechanical seal rings are designed with inner cylindrical positioning stops, with a positioning accuracy of not less than grade 7; the stationary ring bracket 17 that is installed in conjunction with it is designed with outer cylindrical positioning stops, with a positioning accuracy of not less than grade 7; the clearance fit installation is adopted with a hole-based system, and after mutual mating, it is fixed with set screws, which can accurately position and install the stationary rings of the remaining n-1 mechanical seal rings.

[0033] like Figure 2as shown, the stationary ring support 17 is mounted on the end cover 16 from above via the static seal 13 and screws, forming a high-pressure resistant static seal; the stationary ring support 17 is designed with an inner cylindrical positioning spigot, with a positioning accuracy not lower than grade 7; the end cover 16 mated and installed therewith is designed with an outer cylindrical positioning spigot, with a positioning accuracy not lower than grade 7; a hole-based clearance fit is adopted for installation, and after mutual fitting, the stationary ring support 17 can be accurately positioned and installed.

[0034] as Figure 2 as shown, the n moving rings of the mechanical seal ring 11 are designed with cylindrical positioning spigots, with a positioning accuracy not lower than grade 7; the rotating disc 18 mated and installed therewith is designed with a circular hole positioning spigot, with a positioning accuracy not lower than grade 7; a shaft-based clearance fit is adopted for installation, and after mutual fitting, the n moving rings of the mechanical seal ring 11 can be accurately positioned; the n moving rings of the mechanical seal ring 11 form a high-pressure resistant static seal with the end cover 16 via the sealing rings.

[0035] as Figure 2 as shown, the rotating disc 18 is designed with a shifting post 18-1, the upper end of the shifting post 18-1 is screwed into the rotating disc 18 by threads, the lower end of the shifting post 18-1 is embedded into the n moving ring clamping notches of the mechanical seal ring 11, and the lower end of the shifting post 18-1 drives the n moving rings of the mechanical seal ring 11 to rotate along with the rotating disc 18.

[0036] as Figure 2 as shown, the outer circle of the lower end of the stationary ring support 17 is designed with a sealing groove, in which the dynamic seal 12 is installed, forming an auxiliary dynamic seal with the inner cylindrical surface of the lower end of the rotating disc 18, so as to improve the sealing reliability of the whole machine.

[0037] as Figure 1 , Figure 2 as shown, the rotating disc 18 is designed with n oil injection nozzles 14 and n oil injection holes 18-2; the oil injection nozzle 14 is a blind-mate joint, which can form a high-pressure seal after being separated from the oil injection equipment, so that the viscous pressure oil 15 in the sealing cavity maintains a certain high pressure; the viscous pressure oil 15 is high-viscosity hydraulic oil and fills the sealing cavity; the pressure resistance of a single mechanical seal ring is P, and after stepwise pressure transmission, the pressure resistance of n mechanical seal rings is n*P; when the external ambient pressure is P0 and P < P0 < i*P, where 0 < i < n, the multi-layer seal rings 1 will perform stepwise adaptive pressure distribution, that is, from the outside to the inside, each of the outer i-1 layers of the mechanical seal rings 11 has a pressure resistance of P, the actual bearing pressure of the (n-i+1)-th layer is i*P - P0, and the actual bearing pressure of each of the remaining inner n-i layers is 0.

[0038] as Figure 1 , Figure 3 as shown, the azimuth transmission device 2 comprises a slewing bearing 21, a pinion 22, a motor 23 and a self-aligning spindle 24.

[0039] as Figure 3As shown, the motor 23 is designed with an outer cylindrical positioning stop, with a positioning accuracy of not less than grade 7; the self-aligning mandrel 24 that is installed in conjunction with it is designed with an inner cylindrical positioning stop, with a positioning accuracy of not less than grade 7; the basic shaft system clearance fit installation is adopted, and after mutual cooperation, the motor 23 can be accurately positioned and installed.

[0040] like Figure 1 , Figure 3 As shown, the self-aligning mandrel 24 is designed with an outer cylindrical positioning stop, with a positioning accuracy of not less than grade 7; the corresponding position of the base 3 that is installed with it is designed with an inner cylindrical positioning stop, with a positioning accuracy of not less than grade 7; the clearance fit installation adopts a hole-based system, and after mutual cooperation, the self-aligning mandrel 24 can be accurately positioned and installed.

[0041] like Figure 3 As shown, the self-aligning spindle 24 has the function of adjusting the meshing center distance between the pinion 22 and the internal gear ring of the slewing bearing 21, which facilitates gear meshing.

[0042] like Figure 3 As shown, the pinion 22 is mounted on the output shaft of the motor 23, and the pinion 22 meshes with the inner gear ring of the slewing bearing 21; the motor 23 drives the inner ring of the slewing bearing 21 to rotate through the pinion 22.

[0043] like Figure 1 , Figure 5 As shown, the rotary joint 10 includes one or more media rotation transmission devices selected from microwave hinges, optical hinges, electric slip rings, and water hinges. The rotary joint 10 is coaxially mounted with the multi-layer sealing ring 1 and the orientation transmission device 2. The rotary joint 10 is coaxially integrated with an angle measuring device, which can collect the angular position information of the orientation transmission device 2 in real time and transmit the angular position information to the high-pressure dynamic sealing turntable device through the high-pressure watertight connector 5-1 in the transition area.

[0044] In summary, this invention is a simple structure with significant effects, applicable to underwater radar-type stepped adaptive high-pressure dynamic seals. Compared with the prior art, the significant advancements of this invention are as follows: 1) The use of a stepped adaptive high-pressure dynamic seal instead of an O-ring dynamic seal can avoid O-ring wear and corrosion leading to sealing failure; 2) The use of a stepped adaptive high-pressure dynamic seal instead of a single-layer mechanical seal can improve the overall sealing pressure difference and significantly increase the underwater working depth of the radar turntable; 3) The sealing pressure difference of this device is related to the number of multi-layer mechanical seal rings; the more sealing rings, the higher the sealing pressure. By appropriately setting the number of sealing rings, the underwater working pressure of the existing radar turntable can be increased from 6MPa to 24MPa; 4) The sealing rings of this device can distribute the pressure difference to each layer of mechanical seal rings in a stepped and adaptive manner, ensuring that each layer of sealing rings does not overload; 5) The addition of an outer dynamic seal for auxiliary sealing improves the overall sealing reliability; 6) It can monitor leakage information in real time and transmit the leakage information to the high-pressure dynamic seal turntable device through the high-pressure watertight connector in the transfer area; 7) The leakage discharge channel and leakage discharge pipe allow leakage to be discharged outside the high-pressure dynamic seal turntable device.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stepped adaptive high-pressure dynamic sealing turntable device, characterized in that: The system includes a multi-layer sealing ring (1), a directional transmission device (2), a base (3), a rotating column (4), a base (5), a leakage discharge pipe (6), a leakage detection device (7), a cover plate (8), a sealing ring (9), and a rotating joint (10). The stationary ring of the multi-layer sealing ring (1) is installed by fitting the end cap (16) stop, the sealing ring (9), and the screw with the outer flange stop of the base (3), and the installation method adopts a hole-based clearance fit. The moving ring of the multi-layer sealing ring (1) is installed by fitting the rotating column (4) with the inner stop of the turntable (18), the sealant, and the screw, and the installation method adopts a hole-based clearance fit. The directional transmission device (2) is installed by fitting the outer stop of the outer ring of the slewing bearing (21) with the inner stop of the base (3), and the installation method adopts the basic shaft clearance fit; the directional transmission device (2) is installed by fitting the outer stop of the inner ring of the slewing bearing (21) with the inner stop of the rotating column (4), and the installation method adopts the basic shaft clearance fit; the base (5) is installed on the base (3) from below by the sealing ring (9) and screws to form a high pressure resistant static seal; the middle part of the base (5) is designed with a concave external input and output transition area, and the transition area is equipped with a high pressure resistant watertight connector (5-1). The end cap (16) is designed with a high cylindrical water-blocking feature (16-1) to prevent leakage from the multi-layer sealing ring (1) from flowing around. The end cap (16) is designed with a leakage discharge channel (16-2) and a threaded drain port (16-3). The leakage discharge channel (16-2) is formed by casting combined with a pressure plate and a sealing gasket. The threaded drain port (16-3) is connected to the leakage discharge pipe (6) so that the leakage enters the leakage discharge pipe (6) along the leakage discharge channel (16-2). Afterwards, the leakage is discharged outside the high-pressure dynamic sealing turntable device; the upper end of the base (3) is provided with a cylindrical hole to facilitate the passage of the leakage discharge pipe (6) to discharge the leakage of the multi-layer sealing ring (1) to the outside of the high-pressure dynamic sealing turntable device; the cover plate (8) is installed on the upper part of the dynamic ring turntable (18) of the multi-layer sealing ring (1) by means of the sealing ring (9) and screws to form a high-pressure resistant static seal; the leakage detection device (7) is installed in the cavity of the base (3) and can monitor the leakage information in real time and transmit the leakage information out of the high-pressure dynamic sealing turntable device through the high-pressure resistant watertight connector (5-1) in the transfer area.

2. The stepped adaptive high-pressure dynamic sealing turntable device according to claim 1, characterized in that: The multi-layer seal ring (1) includes a mechanical seal ring (11), a dynamic seal (12), a static seal (13), an oil injection nozzle (14), viscous pressure oil (15), an end cover (16), a static ring support (17), and a turntable (18); the mechanical seal ring (11) sequentially includes, from the inside to the outside, a 1st-layer mechanical seal ring (11-1), a 2nd-layer mechanical seal ring (11-2), a 3rd-layer mechanical seal ring (11-3), up to an nth-layer mechanical seal ring (11-n), where n is a natural number greater than 3; the static ring of the 1st-layer mechanical seal ring (11-1) is mounted on the end cover (16), the static rings of the remaining n-1 mechanical seal rings are mounted on the static ring support (17), and the static ring support (17) is mounted on the end cover (16) via the static seal (13) and screws; the n moving rings of the mechanical seal ring (11) and the turntable (18) achieve high-pressure static sealing in the radial direction through sealing rings, and are radially positioned by spigots; the turntable (18) is designed and installed with a toggle post (18-1), which is embedded in the n moving ring bayonets of the mechanical seal ring (11), and toggles the n moving rings of the mechanical seal ring (11) to rotate along with the turntable (18); an outer-layer dynamic seal (12) is installed between the static ring support (17) and the turntable (18) for auxiliary sealing, so as to improve the sealing reliability of the whole machine; the turntable (18) is designed with n oil injection nozzles (14) and n oil injection holes (18-2), and the viscous pressure oil (15) is high-viscosity hydraulic oil that fills the sealing cavity; the pressure resistance of a single mechanical seal ring is P, and the pressure resistance of n mechanical seal rings is n*P; When the external ambient pressure is P0, and P < P0 < i*P, where 0 < i < n, the multi-layer seal ring (1) performs stepwise adaptive pressure distribution, that is, from the outside to the inside, each of the nth layer to the n-i+2th layer of the mechanical seal ring (11) has a pressure resistance of P, the n-i+1th layer actually bears a pressure of i*P - P0, and the remaining n-i layers actually bear a pressure of 0.

3. The stepped adaptive high-pressure dynamic sealing turntable device according to claim 1, characterized in that: The azimuth transmission device (2) includes a slewing bearing (21), a pinion (22), a motor (23), and a self-aligning spindle (24); the motor (23) is mounted on the base (3) via the self-aligning spindle (24), the pinion (22) is mounted on the output shaft of the motor (23), and the pinion (22) meshes with the inner gear ring of the slewing bearing (21); the motor (23) drives the inner ring of the slewing bearing (21) to rotate through the pinion (22).

4. The stepped adaptive high-pressure dynamic sealing turntable device according to claim 1, characterized in that: The rotary joint (10) includes one or more medium rotary transmission devices selected from a microwave hinge, an optical hinge, an electrical slip ring, and a water hinge, and is mounted coaxially with the multi-layer seal ring (1) and the azimuth transmission device (2); the rotary joint (10) is coaxially integrated with an angle measuring device, which can collect the angular position information of the azimuth transmission device (2) in real time, and transmit the angular position information out of the high-pressure dynamic sealing turntable device through the high-pressure-resistant watertight connector (5-1) in the transition region.

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