A gas release device for gas lubrication and drag reduction of wading navigation body

Abstract

The present invention discloses a gas release device for gas lubrication and drag reduction of wading navigation bodies. A cavity is arranged inside the outer shell base, a top plate is arranged on the top surface of the outer shell base to close the cavity of the outer shell base, a chamber isolation assembly is arranged in the cavity of the outer shell base, and the cavity is isolated and divided into two chambers, an external guide ventilation chamber and an internal control chamber, by the chamber isolation assembly; a sliding assembly is movably installed in the chamber isolation assembly, and is used to open the flow between the external guide ventilation chamber and the internal control chamber. The present invention can ensure the original flatness of the ship surface, and can control the release of gas to effectively prevent the attachment of marine organisms, and use the gas required for gas lubrication for two purposes, thereby reducing the attachment of marine organisms on the surface of the vent.

Description

Technical Field

[0001] The present invention relates to a gas control device in the technical field of air bubble drag reduction of a water-borne vehicle, and in particular to a gas release device for gas lubrication and drag reduction of a water-borne vehicle. Background Art

[0002] For example, the main technical idea of ​​bubble drag reduction for water-borne objects such as ships is to introduce air to the bottom of the ship, and through the continuous or discrete bubbles formed between the hull and the water, reduce the wetted area of ​​the hull, so as to significantly reduce the friction resistance of the ship's navigation. In terms of technical approaches, generally, the exhaust gas of the hull or an external air source is used to install a ventilation device at the front of the hull, and the air volume is adjusted in accordance with the ship's operating speed to achieve green and energy-saving navigation of the ship.

[0003] Most of the current gas release units are open chambers, which destroy the continuity and flatness of the original surface of the ship. In addition, the static structure is easily attached by marine organisms, thus affecting the actual drag reduction effect.

[0004] Gas lubrication drag reduction can effectively reduce the wetted area of ​​ships, underwater navigation bodies, etc., reduce navigation resistance, save propulsion power, and reduce operating power consumption. However, existing gas release units often destroy the flatness of the structure, increasing the ship's drag when the gas lubrication drag reduction device is not working; on the other hand, the existing gas release unit structure is mostly static, which is easily attached to marine organisms and loses its effectiveness.

[0005] In the ship air lubrication system of patent application No. 202120798777.2, an air injection module consisting of multiple chambers arranged horizontally is set at the bottom of the ship, and the gas is discharged from the normally open circular holes at the bottom of the chamber. When the gas lubrication drag reduction device is not enabled, the normally open holes will disrupt the surrounding flow field, bring additional resistance, and once marine organisms are attached, it will seriously affect the ventilation efficiency and accelerate the corrosion of the structure.

[0006] The ship air layer drag reduction system with patent application number 202010499931.6 includes a vortex-controlled cavitation device, which opens a large cavity at the bottom of the ship, occupying more than 50% of the area of ​​the bottom of the ship. A large vortex breaker is arranged at the leading edge of the cavity, which seriously damages the bottom line of the ship and increases the drag when the air layer drag reduction device is not working.

[0007] The air injection device of patent application No. 201580018386.1 is characterized by a step-type ventilation structure protruding from the bottom plate of the ship. A flow guide structure is arranged inside the step, and the circular holes evenly arranged at the bottom are ventilation holes. When the ship is sailing at a slow speed, the step will increase the wetted area of ​​the ship, and the change in the line will increase both the friction resistance and the pressure difference resistance.

[0008] In summary, there are two problems with the existing gas release device. On the one hand, it destroys the flatness of the original surface of the ship and increases a certain degree of resistance. On the other hand, the current ventilation structure is mostly a static structure, which is easily attached by marine organisms, affecting the gas lubrication effect and increasing the cost of maintenance. Summary of the invention

[0009] In order to solve the problems existing in the background technology, the present invention provides a gas release device for gas lubrication and drag reduction of a water-borne vehicle, which can ensure the original flatness of the surface of the water-borne vehicle and can control the gas release to effectively prevent the attachment of marine organisms.

[0010] The present invention aims at two problems in the background technology, and uses the gas required for gas lubrication for dual purpose, realizing a controllable gas release structure that opens the vent when needed and closes the vent when not needed, so as to ensure the flatness of the original surface of the wading navigation body and reduce the attachment of marine organisms on the surface of the vent.

[0011] In view of the above two problems, the present invention designs a gas release device that can be opened and closed, and its vent is flush with the surface of the wading vessel. When the device is not working, the gas acts as a pressure source to close the vent; when the device is working, the valve is switched, and the gas is discharged from the vent to achieve a ventilation effect. On the one hand, the flatness of the original surface of the wading vessel is guaranteed; on the other hand, the gas can be used for two purposes, realizing the opening and closing of the vent, and preventing marine organisms from attaching to the chamber and the vent.

[0012] The technical solution adopted by the present invention is:

[0013] It includes a shell base, and a relatively closed cavity is arranged inside;

[0014] It includes a chamber isolation component, which is arranged in the cavity of the housing base, and the cavity is isolated and divided into two chambers, an external guide ventilation chamber and an internal control chamber, by the chamber isolation component;

[0015] It includes a sliding assembly, which is movably installed in the chamber isolation assembly and is used to open the flow between the external guide ventilation chamber and the internal control chamber.

[0016] It also includes a through hole for communicating the gas source with the internal control chamber as the control chamber air port and a through hole for communicating the gas source with the external guide ventilation chamber as the guide ventilation chamber air port.

[0017] The shell base and chamber isolation assembly are provided with an airway structure at the bottom for conducting the flow of air from the external guide ventilation chamber to the bottom of the internal control chamber; the airway structure includes a radial channel at the bottom of the shell base cavity below the chamber isolation assembly and a bottom through groove at the bottom surface of the chamber isolation assembly, and the external guide ventilation chamber flows to the bottom through the radial channel, and the bottom through groove and the internal control chamber are directly connected.

[0018] The shell base is provided with a vent at the bottom for communicating with the outside world, and the bottom of the sliding component is used to extend into the vent at the bottom of the shell base to block the vent.

[0019] A boss is provided on the bottom surface of the inner cavity of the shell base, and the vent is opened on the boss.

[0020] The sliding assembly comprises a vent plug and a sliding shell. The sliding shell is barrel-shaped. The bottom surface of the sliding shell is fixedly provided with a vent plug for extending into the vent for sealing.

[0021] When the vent plug of the sliding assembly is completely blocked in the vent, the outer end surface of the vent plug and the bottom surface of the shell base are flush and in the same plane.

[0022] The vent is a cylindrical or inverted conical opening, and the vent plug is a corresponding cylindrical or conical opening.

[0023] It also includes a top plate, which is arranged on the top surface of the shell base and closes the cavity of the shell base;

[0024] A through hole for communicating the air source with the internal control chamber is provided on the top plate above the internal control chamber as the control chamber air port;

[0025] A through hole for allowing the air source and the external guide ventilation chamber to circulate is provided on the top plate above the external guide ventilation chamber as an air port of the guide ventilation chamber.

[0026] The boss of the housing base is provided with an annular groove as a first sealing ring groove, and the first sealing ring groove is used to place an O-ring, so that when the sliding assembly is at the bottom, the boss of the housing base and the bottom surface of the sliding shell of the sliding assembly are sealed and connected via the O-ring;

[0027] The housing base is provided with an annular groove as a second sealing ring groove on the top surface connected to the top plate, and the second sealing ring groove is used to place an O-ring, so that the housing base and the top plate are always sealed and connected through the O-ring;

[0028] The main body of the chamber isolation assembly is a barrel structure similar to the sliding shell of the sliding assembly. The bottom surface of the internal control chamber in the chamber isolation assembly is provided with an annular groove as a third sealing groove. The third sealing groove is used to place an O-ring, so that when the sliding assembly is at the bottom, the bottom surface of the sliding shell of the sliding assembly and the bottom surface of the internal control chamber are sealed and connected by the O-ring.

[0029] A plurality of supporting connectors are fixedly arranged at intervals along the circumference on the bottom surface of the shell base cavity below the chamber isolation assembly, each supporting connector is arranged radially, and radial channels are formed between adjacent supporting connectors.

[0030] The sliding component is made of polytetrafluoroethylene material and has good sealing and corrosion resistance.

[0031] When the device is not enabled and no gas is released, the pipeline leading to the ventilation chamber is cut off, and the gas is input into the internal control chamber, so that the pressure inside the chamber is greater than the pressure outside the vent. The sliding assembly is fixed in the bottom position, causing the vent to be closed and unable to release gas.

[0032] When the device is activated to release gas, the pipeline leading to the internal control chamber is cut off, the gas in the internal control chamber is discharged through the air inlet, the gas is input into the external guide ventilation chamber, and flows to the bottom of the sliding component through the air channel, so that the pressure applied to the bottom of the sliding component is greater than the sum of the gravity of the sliding component and the internal pressure of the internal control chamber, driving the sliding component to move upward, the vent is opened, and the gas is discharged and released. Releasing gas on the surface of the wading navigation body achieves a gas lubrication effect.

[0033] The gas release device of the present invention can be used in the release of bubbles for lubrication and drag reduction of a wading vessel. The device of the present invention is installed on the wetted surface of the wading vessel, and has a better effect when installed on a flat surface of the wading vessel.

[0034] The water-related navigation bodies include underwater navigation bodies and surface navigation bodies. The surface navigation bodies are usually ships, amphibious vehicles, seaplanes, etc., and the underwater navigation bodies are usually submarines, underwater robots, etc., but are not limited to these.

[0035] The technical effects of the present invention relative to the prior art are:

[0036] The device of the present invention can avoid damaging the flatness of the original surface of the wading vehicle, will not increase the formation resistance, is not easy to be attached by marine organisms, will not affect the lubrication of the gas flowing through the surface of the wading vehicle, is easy to maintain and has low maintenance costs.

[0037] On the one hand, the present invention provides an openable and closable gas release structure, and no additional power device is required to realize the movement of the structure, and no additional power device is required to drive the movement of the structure, so that the structure of the device is compact;

[0038] On the other hand, the openable and closable structure of the present invention ensures the flatness of the unit surface, avoids bringing additional resistance, and provides a dynamic vent structure to effectively prevent the attachment of marine organisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is an appearance diagram of a gas release unit provided by an embodiment of the present invention;

[0040] Figure 2 is a cross-sectional structural diagram of the first embodiment;

[0041] Figure 3 It is a diagram of the internal chambers and passages;

[0042] Figure 4 is a cross-sectional structural diagram of a second embodiment;

[0043] Figure 5 It is a partial method diagram of the second embodiment.

[0044] Description of reference numerals:

[0045] 1 Housing base

[0046] 11 Ventilation port

[0047] 12 First sealing groove

[0048] 13 Support connector

[0049] 14 Second sealing groove

[0050] 2 Chamber Isolation Assembly

[0051] 21 Third sealing groove

[0052] 3 Sliding components

[0053] 31 Vent plug

[0054] 311 Impeller Vent Plug

[0055] 312 Rotating parts

[0056] 313 Seals

[0057] 314 Sealed safety cover

[0058] 32 Sliding Shell

[0059] 33 Support Slider

[0060] 4 Top Plate

[0061] 41 Control chamber air port

[0062] 42 A guide venting chamber air port. DETAILED DESCRIPTION

[0063] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0064] like Figure 2 and Figure 3 As shown, the device is mainly composed of a housing base 1, a chamber isolation component 2, a sliding component 3, a top plate 4 and a solenoid valve.

[0065] It comprises a housing base 1, in which a cavity is arranged;

[0066] The top plate 4 is arranged on the top surface of the housing base 1 to seal the cavity of the housing base 1; the top plate 4 is fixedly connected to the housing base 1 at the end surface of the outer edge by screws, such as Figure 1 shown.

[0067] The chamber isolation assembly 2 is provided in the cavity of the housing base 1. Specifically, the chamber isolation assembly 2 is fixedly installed in the cavity of the housing base 1. The housing base 1 and the chamber isolation assembly 2 are fixedly connected at the bottom by screws. The chamber isolation assembly 2 is used to separate the cavity from the outside to the inside into two chambers: an external guide ventilation chamber located outside the chamber isolation assembly 2 and an internal control chamber located inside the chamber isolation assembly 2. In specific implementation, there is an annular gap space between the outer periphery of the chamber isolation assembly 2 and the inner wall of the cavity of the housing base 1 as the external guide ventilation chamber, and an internal control chamber is formed inside the chamber isolation assembly 2 itself. There is a sliding assembly 3 that can slide freely in the internal control chamber.

[0068] It includes a sliding component 3, which can be freely slid up and down and movably installed in the chamber isolation component 2. The sliding component 3 can move axially along the chamber isolation component 2 and then drive it to open the flow between the external guide ventilation chamber and the internal control chamber.

[0069] O-rings are used to seal the housing base 1 and the top plate 4 and the chamber isolation assembly 2, respectively, to ensure the sealing performance of the guide ventilation cavity and the control cavity.

[0070] The housing base 1 and the chamber isolation assembly 2 are provided with an airway structure at the bottom for conducting the flow of air from the external ventilation chamber to the bottom of the internal control chamber.

[0071] The airway structure includes a radial channel at the bottom of the cavity of the housing base 1 below the chamber isolation component 2 and a bottom through groove at the bottom surface of the chamber isolation component 2. The external guide ventilation chamber flows to the bottom through groove through the radial channel, and the bottom through groove is directly connected to the internal control chamber. In this way, the airflow from the external guide ventilation chamber can flow to the bottom through groove through the radial channel to apply air pressure to the bottom surface of the sliding component 3 in the internal control chamber in the chamber isolation component 2.

[0072] The outer shell base 1 has a vent 11 at the bottom center for communication with the outside world. The vent is located in the middle of the bottom groove on the bottom surface of the chamber isolation component 2. The bottom of the sliding component 3 is used to extend into the vent 11 at the bottom of the outer shell base 1 to block the vent 11.

[0073] A boss is provided at the center of the bottom surface of the inner cavity of the housing base 1 , and the boss is located in the middle of the bottom through groove of the chamber isolation component 2 , and the vent 11 is opened at the coaxial center of the boss.

[0074] The sliding assembly 3 includes a vent plug 31 and a sliding shell 32. The sliding shell 32 is barrel-shaped. The vent plug 31 is fixedly provided at the center of the bottom surface of the sliding shell 32 for inserting into the vent 11 for blocking. The vent plug 31 cooperates with the vent 11 of the housing base 1 to achieve blocking, and the sliding shell 32 cooperates with the chamber isolation assembly 2 to achieve relative sliding. The height of the sliding shell 32 can be used to limit the position of the sliding assembly 3.

[0075] When the vent plug 31 of the sliding assembly 3 is completely blocked in the vent 11 , the outer end surface of the vent plug 31 is flush with the bottom surface of the housing base 1 and is located in the same plane.

[0076] The vent 11 is cylindrical, and the vent plug 31 is cylindrical, which can enhance the sealing performance.

[0077] The vent 11 is an inverted cone-shaped opening, and the vent plug 31 is an inverted cone-shaped opening, which makes it easy for the sliding component 3 to achieve ventilation once it is pushed by gas, thereby improving the ventilation efficiency.

[0078] like Figure 2 As shown, a through hole for circulating the control gas source and the internal control chamber is opened on the top plate 4 above the internal control chamber as a control chamber air port 41. Specifically, a control chamber air port 41 is opened in the middle of the top plate 4. The control chamber air port 41 is used to allow the control gas generated by the control gas source to enter the internal control chamber and thereby control the movement of the sliding assembly 3.

[0079] like Figure 2 As shown, the top plate 4 above the external guide ventilation chamber is provided with a through hole for communicating the release gas source and the external guide ventilation chamber as a guide ventilation chamber air port 42. The through hole is used to allow the gas generated by the release gas source to enter the external guide ventilation chamber and thus control the movement of the sliding component 3.

[0080] like Figure 3As shown, an annular groove is provided on the boss of the housing base 1 as a first sealing ring groove 12, and the first sealing ring groove 12 is used to seal the sliding assembly 3 and the housing base 1 to prevent seawater and the like from flowing into the chamber. The first sealing ring groove 12 is used to place an O-ring, so that when the sliding assembly 3 is at the bottom, the boss of the housing base 1 and the bottom surface of the sliding shell 32 of the sliding assembly 3 are sealed and connected through the O-ring, which is used to seal and prevent liquid from entering the chamber when the device is closed.

[0081] like Figure 2 As shown, the housing base 1 is provided with an annular groove as a second sealing ring groove 14 on the top surface connected to the top plate 4. The second sealing ring groove 14 is used to place an O-ring, so that the housing base 1 and the top plate 4 are always sealed and connected via the O-ring, which is used to seal and prevent liquid from entering the chamber when the device is closed.

[0082] like Figure 3 As shown, at the same time, the main body of the chamber isolation component 2 is a barrel structure similar to the sliding shell 32 of the sliding component 3, and the bottom surface of the internal control chamber in the chamber isolation component 2 is provided with an annular groove as the third sealing groove 21, and the third sealing groove 21 is used to control the sealing of the chamber to ensure the pressing force of the gas on the sliding component 3. The third sealing groove 21 is used to place an O-ring, so that when the sliding component 3 is at the bottom, the bottom surface of the sliding shell 32 of the sliding component 3 and the bottom surface of the internal control chamber are sealed and connected by the O-ring, which is used to seal and prevent liquid from entering the chamber when the device is closed.

[0083] like Figure 2 As shown, a plurality of supporting connectors 13 are fixedly arranged at intervals along the circumference on the bottom surface of the cavity of the housing base 1 below the chamber isolation assembly 2. Each supporting connector 13 is arranged radially, and a radial channel is formed between adjacent supporting connectors 13. At the same time, the supporting connector 13 is also used to connect and support the chamber isolation assembly 2. A screw hole is provided on the supporting connector 13. The screw passes through the bottom of the chamber isolation assembly 2 and is threadedly connected to the screw hole so that the chamber isolation assembly 2 and the housing base 1 are fixedly connected. In this way, the supporting connector 13 is not only used to support and connect the two components, but also can guide the gas flow, making the gas flow more stable and uniform.

[0084] Figure 4 is a cross-sectional view showing a gas release device according to a second embodiment of the present invention, Figure 5 This is a partial enlarged view of the vent plug part.

[0085] The gas release device according to the second embodiment of the present invention is the same as the gas release device according to the first embodiment, and comprises a housing base 1, a chamber isolation assembly 2, a sliding assembly 3, a top plate 4 and a solenoid valve.

[0086] In addition, the sliding shell 32 can be a cylinder with a plurality of protrusions, and the protrusions are supporting sliding strips 33, which replace surface contact with line contact to ensure smooth sliding while ensuring sealing performance. The cross section of the supporting sliding strip 33 can be semicircular or trapezoidal.

[0087] The vent plug 31 may be a structure integrally fixed on the sliding shell 32 , or may be an impeller-type vent plug 311 .

[0088] The impeller type vent plug 311 is connected to the sliding shell 32 through the rotating member 312. The impeller type vent plug 311 and the rotating member 312 are coaxially connected, and the rotating member 312 is sleeved in the hole of the sliding shell 32. The rotating member 311 can be a rolling bearing, so that the rotation resistance is small.

[0089] The impeller type vent plug 311 is located below the bottom plate of the sliding shell 32, and a sealing cover 314 is provided above the vent plug 311. The sealing cover 314 is located above the bottom plate of the sliding shell 32 to ensure the airtightness of the internal control chamber. The sealing cover 314 and the end surface of the rotating member 312 are sealed and connected by a sealing member 313.

[0090] The impeller type vent plug 311 can rotate when gas passes through, so as to clean the sand and other interferences that affect the cooperation between the vent plug and the vent.

[0091] The impeller surface cross-section of the impeller-type air vent plug 311 may be "S"-shaped, rectangular, or parallelogram.

[0092] As described above, under the impetus of the gas, the impeller-type vent plug rotates, thereby cleaning the residue on the inner surface of the vent, ensuring the coordination of the vent plug and the vent, and achieving airtightness when the device is closed.

[0093] The device of the present invention is installed on the wetted surface of the hull, and the working principle process after installation is as follows:

[0094] The gas release device of the present invention is installed at a selected position on the ship.

[0095] When the gas release device is in the enabled state, that is, when the control pipeline is closed and the ventilation pipeline is opened, the control chamber air port 41 is not ventilated, and the gas generated by the release gas source is passed into the external guide ventilation chamber through the guide ventilation chamber air port 42, and the gas in the external guide ventilation chamber flows to the bottom of the sliding shell 32 of the sliding assembly through the air channel, and the air pressure is applied to the bottom surface of the sliding shell 32 of the sliding assembly, so that the pressure applied to the bottom surface of the sliding shell 32 of the sliding assembly is greater than the sum of the overall gravity of the sliding assembly and the internal pressure of the internal control chamber, driving the sliding assembly to move upward as a whole, and the vent plug 31 of the sliding assembly is separated from the vent 11, and the vent 11 is opened, and the gas generated by the release gas source flows out through the air channel and then through the vent 11 to realize the release of gas. When the gas is released on the hull surface, gas lubrication and drag reduction can be achieved.

[0096] When the gas release device is in a closed state, that is, the control pipeline is open and the ventilation pipeline is closed, the air inlet 42 of the guide ventilation chamber is not ventilated, and the gas generated by the control gas source is passed into the internal control chamber through the control chamber air inlet 41, and the gas pressure in the internal control chamber is applied to the top surface of the sliding shell 32 of the sliding assembly. Under the action of the sum of the pressure applied to the sliding shell 32 of the sliding assembly and the overall gravity of the sliding assembly, the sliding assembly is driven to move downward to the bottom as a whole, and the vent plug 31 of the sliding assembly blocks the vent 11 and fully presses it, and the vent 11 is closed, and the gas in the external guide ventilation chamber cannot be connected to the vent 11 through the airway, and thus the gas cannot be released from the vent 11. At this time, the bottom of the gas release device is flat.

[0097] In a specific implementation, the release gas source and the control gas source are the same gas source, which is connected to the control chamber gas port 41 and the guide ventilation chamber gas port 42 respectively through the solenoid valve, and is connected to one of the control chamber gas port 41 and the guide ventilation chamber gas port 42 by switching the control gas source.

[0098] In this way, the gas release device of the present invention realizes the switching of the two pipelines through the electromagnetic valve, so that the gas is used as the medium for opening and closing the vent respectively.

[0099] When the gas release device is in a closed state, that is, the control pipeline is open and the ventilation pipeline is closed, the gas of the gas source is connected and stored in the internal control chamber. The internal pressure is greater than the external pressure of the vent 11. The vent 11 is blocked and closed by the vent plug 31 of the sliding assembly, and the external surface of the device is flat.

[0100] When the gas release device is in the enabled state, that is, the control pipeline is closed and the ventilation pipeline is opened, the gas from the gas source is connected to the external guide ventilation chamber, and then flows out from the external guide ventilation chamber through the airway to the bottom of the sliding assembly, thereby pushing the sliding assembly to move upward, the vent 11 and the vent plug 31 of the sliding assembly are separated and then opened, and the gas is smoothly discharged from the vent 11, thereby realizing the ventilation and drag reduction function.

[0101] It can be seen from this that the gas release device makes full use of the compressibility of the gas, cleverly realizes the automatic opening and closing of the vent, ensures the flatness of the vent surface and the original surface of the wading vehicle, and effectively prevents the attachment of marine organisms.

Claims

1. A gas release device for gas lubrication and drag reduction of a wading vehicle, characterized in that: It comprises a housing base (1) with a relatively closed cavity arranged inside; It comprises a chamber isolation component (2) which is arranged in the cavity of the housing base (1), and the chamber isolation component (2) is used to isolate the cavity into two chambers, namely an external guide ventilation chamber and an internal control chamber; It comprises a sliding assembly (3) movably mounted in the chamber isolation assembly (2) and used to open the flow between the external guide ventilation chamber and the internal control chamber; The housing base (1) is provided with a vent (11) at the bottom for communicating with the outside, and the bottom of the sliding assembly (3) is used to extend into the vent (11) at the bottom of the housing base (1) to block the vent (11); The sliding assembly (3) comprises a vent plug (31) and a sliding shell (32); the sliding shell (32) is barrel-shaped, and a vent plug (31) is fixedly provided on the bottom surface of the sliding shell (32) for extending into the vent (11) for sealing. The vent plug (31) is an impeller-type vent plug (311), the impeller-type vent plug (311) is connected to the sliding shell (32) via a rotating member (312), the impeller-type vent plug (311) and the rotating member (312) are coaxially connected, and the rotating member (312) is sleeved in a hole of the sliding shell (32); The impeller-type vent plug (311) is located below the bottom plate of the sliding shell (32), and a sealing safety cover (314) is provided above the vent plug (311). The sealing safety cover (314) is located above the bottom plate of the sliding shell (32) and is used to ensure the airtightness of the internal control chamber. The sealing safety cover (314) and the end surface of the rotating member (312) are sealed and connected by a sealing member (313); The impeller-type vent plug (311) rotates when gas passes through, and is used to clean the interference remaining on the inner wall of the vent (11) that affects the fit between the vent plug and the vent; Also included is a through hole for communicating the air source with the internal control chamber as the control chamber air port (41) and a through hole for communicating the air source with the external guide ventilation chamber as the guide ventilation chamber air port (42); The shell base (1) and the chamber isolation component (2) are provided with an airway structure at the bottom for conducting the flow of the external guide ventilation chamber to the bottom of the internal control chamber; the airway structure comprises a radial channel opened at the bottom of the cavity of the shell base (1) below the chamber isolation component (2) and a bottom through groove opened on the bottom surface of the chamber isolation component (2); the external guide ventilation chamber flows through the radial channel to the bottom through groove, and the bottom through groove is directly connected to the internal control chamber; It also includes a top plate (4) which is arranged on the top surface of the shell base (1) and seals the cavity of the shell base (1); A through hole for communicating the air source with the internal control chamber is provided on the top plate (4) above the internal control chamber, serving as a control chamber air port (41); The top plate (4) above the external guide ventilation chamber is provided with a through hole for allowing the air source and the external guide ventilation chamber to circulate, serving as a guide ventilation chamber air port (42).

2. A gas release device for gas lubrication and drag reduction of a wading vehicle according to claim 1, characterized in that: When the vent plug (31) of the sliding assembly (3) is completely sealed in the vent (11), the outer end surface of the vent plug (31) and the bottom surface of the housing base (1) are flush and located in the same plane.

3. The gas release device for gas lubrication and drag reduction of a wading vehicle according to claim 1, characterized in that: An annular groove is provided on the boss of the housing base (1) as a first sealing ring groove (12), and the first sealing ring groove (12) is used to accommodate an O-ring, so that when the sliding assembly (3) is at the bottom, the boss of the housing base (1) and the bottom surface of the sliding shell (32) of the sliding assembly (3) are sealed and connected via the O-ring.

4. The gas release device for gas lubrication and drag reduction of a wading vehicle according to claim 1, characterized in that: The housing base (1) has an annular groove as a second sealing ring groove (14) on the top end surface connected to the top plate (4); the second sealing ring groove (14) is used to accommodate an O-ring, so that the housing base (1) and the top plate (4) are always sealed and connected via the O-ring.

5. The gas release device for gas lubrication and drag reduction of a wading vehicle according to claim 1, characterized in that: The main body of the chamber isolation component (2) is a barrel structure similar to the sliding shell (32) of the sliding component (3). The bottom surface of the internal control chamber in the chamber isolation component (2) is provided with an annular groove as a third sealing groove (21). The third sealing groove (21) is used to place an O-ring, so that when the sliding component (3) is at the bottom, the bottom surface of the sliding shell (32) of the sliding component (3) and the bottom surface of the internal control chamber are sealed and connected via the O-ring.

6. The gas release device for gas lubrication and drag reduction of a wading vehicle according to claim 1, characterized in that: A plurality of supporting connecting members (13) are fixedly arranged at intervals along a circumference on the bottom surface of the cavity of the housing base (1) below the chamber isolation assembly (2); each supporting connecting member (13) is arranged radially, and radial channels are formed between adjacent supporting connecting members (13).

7. Application of the gas release device according to any one of claims 1 to 6, characterized in that: Application of bubble release in lubrication and drag reduction of wading vehicles.

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