A gas release device for automatic passive opening and closing of a wading navigation body

Abstract

The present invention discloses a gas release device that can be automatically and passively opened and closed for a wading navigation body. A ventilation chamber is provided in the ventilation chamber body, and at least one group of air inlets and outlets is provided on the side wall along the first direction, and each group of air inlets and outlets includes air inlets and outlets respectively provided on two sides; the intermediate shaft is freely movable in the ventilation chamber along the first direction; the pressure stabilizing chamber is provided on the side of the ventilation chamber body where the air inlet is provided and is connected to the air inlet; the first gas pipeline is connected to the pressure stabilizing chamber; the second gas pipeline is respectively connected to the first gas pipeline and the ventilation chamber. The present invention realizes the automatic and passive opening and closing control of gas release in ship bubble drag reduction, can open and close automatically without an external power source, does not require an additional power device to drive, and prevents the attachment of marine organisms.

Description

Technical Field

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

[0002] For example, the main technical idea of ​​bubble drag reduction for water-borne vessels 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 according to the ship's operating speed to reduce navigation resistance, save propulsion power, reduce operating power consumption, and realize green and energy-saving navigation of ships.

[0003] Most of the current gas release units are open chambers, which are open structures, destroying the continuity and flatness of the original surface of the ship. In addition, the static open structure makes it easy for marine organisms to enter the chamber and attach to the chamber, thus affecting the actual drag reduction effect. In addition, the existing movable ventilation structure requires an external power source, which increases the load.

[0004] For example, in the gas release device of patent application No. 201520281832.5, the fan-shaped jet chamber can rotate around a pivot, but needs to be powered by a rotary drive, which makes the system complex and bulky, and increases the overall weight and layout difficulty. Summary of the invention

[0005] In order to solve the problems existing in the background technology, the present invention provides a gas release device that can be opened and closed without an external power source, aiming to solve the problem that the existing open gas release unit is easily attached by marine organisms, or the existing movable gas release device requires an additional power source, making the system complex and bulky.

[0006] In view of the above two problems, the present invention designs a gas release device that can be opened and closed with gas as the power source. When ventilation is not needed, the gas outlet is closed to prevent marine organisms from attaching to the chamber. During ventilation, part of the gas is used as the power source to push the intermediate shaft to move, open the gas outlet, and achieve ventilation.

[0007] The technical solution adopted by the present invention is:

[0008] It includes a ventilation chamber body, in which a ventilation chamber is provided, and the ventilation chamber body is provided with at least one group of air inlets and outlets on a side wall along a first direction, and each group of air inlets and outlets includes an air inlet and an air outlet respectively provided on two sides of the ventilation chamber body along the first direction;

[0009] It includes an intermediate shaft, which is freely movable in a first direction and is mounted in the ventilation chamber;

[0010] It includes a pressure stabilizing chamber, which is arranged on one side of the ventilation chamber body where the air inlet is opened and is connected with the air inlet;

[0011] It includes a first gas pipeline, which is connected to the pressure stabilizing chamber;

[0012] Includes a second gas pipeline, respectively connected to the first gas pipeline and the ventilation chamber.

[0013] A relatively closed space is formed between the end of the intermediate shaft and the inner end surface of the ventilation chamber as a control chamber, and the second gas pipeline is connected between the middle part of the first gas pipeline and the control chamber.

[0014] One end of the first gas pipeline is connected to the pressure stabilizing chamber, and the other end is connected to an external gas source.

[0015] It also includes a spring, which is arranged in the ventilation chamber near the root end of the intermediate shaft, and the two ends are respectively connected between the root end of the intermediate shaft and the inner end surface of the ventilation chamber.

[0016] The ventilation chamber near the root end of the intermediate shaft is communicated with the outside world through a branch pipeline.

[0017] The intermediate shaft is provided with a conducting structure for moving in a first direction to cooperate and connect the air inlet and the air outlet in the same group of air inlet and outlet.

[0018] The conductive structure comprises an annular groove and an ungrooved portion arranged in sequence along a first direction, wherein the annular groove is provided on the circumferential surface of the intermediate shaft:

[0019] In the gas release state, the gas inlet is connected to the gas outlet through the annular groove;

[0020] In a non-gas releasing state, the air inlet and the air outlet are both blocked by the ungrooved portion of the intermediate shaft where no annular groove is provided, so that the air inlet cannot be communicated with the air outlet via the annular groove.

[0021] A sealing ring groove for installing a sealing ring is formed on the outer peripheral surface of the ungrooved portion, and a sealing ring is installed in the sealing ring groove, so that the ungrooved portion and the inner wall of the ventilation chamber are sealed and connected through the sealing ring.

[0022] The air inlet and the air outlet in the same group of air inlet and outlet are located on the same circumference of the ventilation chamber body.

[0023] The air inlets and air outlets in the same group of air inlets and air outlets are not exactly located on the same circumference of the ventilation chamber body, and the distance between the air inlets and air outlets in the same group of air inlets and air outlets along the first direction is smaller than the width of the annular groove.

[0024] The ventilation chamber body is provided with a plurality of groups of air inlets and outlets, and the intermediate shaft is provided with the same number of conducting structures as the number of the groups of air inlets and outlets.

[0025] The intermediate shaft is provided with a plurality of conducting structures in the first direction.

[0026] The ventilation chamber body is provided with an inner flange inside the ventilation chamber for limiting the movement of the intermediate shaft, and the inner flange is embedded in the annular groove provided on the intermediate shaft.

[0027] The device of the present invention can be used in the release of bubbles for lubrication and drag reduction of a wading navigation body. The device of the present invention is installed on the wetted surface of the wading navigation body.

[0028] 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.

[0029] The technical effects of the present invention relative to the prior art are:

[0030] The present invention realizes the automatic passive opening and closing control of gas release in bubble drag reduction of a wading navigation body, can open and close automatically without an external power source, does not require an additional power device to drive, and prevents the attachment of marine organisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is the internal structure diagram of the present invention.

[0032] Description of reference numerals:

[0033] 1 Ventilation chamber body

[0034] 11 Air outlet

[0035] 12 Air Inlet

[0036] 2 Intermediate shaft

[0037] 21 Sealing ring groove

[0038] 3. First gas pipeline

[0039] 4 Second gas pipeline

[0040] 5. Pressure stabilizing chamber

[0041] 8 Spring. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] like Figure 1 As shown, the device is mainly composed of a ventilation chamber body 1, an intermediate shaft 2, a first gas pipeline 3, a second gas pipeline 4, a pressure stabilizing chamber 5, and a spring 8.

[0044] The invention comprises a ventilation chamber body 1, in which a ventilation chamber in the shape of a column is arranged, and the ventilation chamber body 1 is provided with at least one group of air inlets and outlets on a side wall along a first direction, and each group of air inlets and outlets comprises an air inlet 12 for air intake and an air outlet 11 for air exhaust, respectively provided on two sides of the ventilation chamber body 1 along the first direction;

[0045] It comprises an intermediate shaft 2 in the form of a cylinder, which is sealed and installed in the ventilation chamber so as to be freely movable along a first direction; the first direction is the direction from the end to the root end of the intermediate shaft 2.

[0046] It includes a pressure-stabilizing chamber 5, which is arranged on the side of the ventilation chamber body 1 where the air inlet 12 is opened and is connected to the air inlet 12; in a specific implementation, a side cavity is arranged on the side of the ventilation chamber body 1 where the air inlet 12 is opened, and a cavity connected to the ventilation chamber is arranged in the side cavity, and the cavity serves as the pressure-stabilizing chamber 5.

[0047] It includes a first gas pipeline 3, which is connected to a pressure stabilizing chamber 5;

[0048] It includes a second gas pipeline 4, which is respectively connected to the first gas pipeline 3 and the ventilation chamber.

[0049] A relatively closed space is formed between the end face of the intermediate shaft 2 and the inner end face of the corresponding ventilation chamber as a control chamber, that is, the ventilation chamber forms a control chamber at the end of the intermediate shaft 2, and the second gas pipeline 4 is connected between the middle part of the first gas pipeline 3 and the control chamber.

[0050] The intermediate shaft 2 and the inner wall of the ventilation chamber are sealedly connected.

[0051] The first gas pipeline 3 has one end connected to the pressure stabilizing chamber 5 and the other end connected to an external gas source, and the other end is used for gas to enter.

[0052] It also includes a spring 8, which is arranged in the ventilation chamber near the root end of the intermediate shaft 2, and the two ends are elastically connected between the root end of the intermediate shaft 2 and the inner end surface of the ventilation chamber corresponding to it.

[0053] In a specific implementation, a shaft parallel to the first direction can be arranged at the center of the root end face of the intermediate shaft 2, the shaft passes through the spring 8, the spring 8 is sleeved outside the shaft, and the shaft can be extended after passing through the ventilation chamber body 1 and can move along the first direction, so that the installation of the spring 8 can be positioned and the movement of the intermediate shaft 2 along the first direction can be positioned. The ventilation chamber body 1 is provided with a through hole for the shaft to pass through, and the shaft and the through hole are sealed and matched.

[0054] The ventilation chamber near the root end of the intermediate shaft 2 is communicated with the outside world through a branch pipeline.

[0055] The intermediate shaft 2 is provided with a conducting structure for moving in the first direction to connect the air inlet 12 and the air outlet 11 in the same group of air inlets and outlets. In a specific implementation, the ventilation chamber body 1 and the intermediate shaft 2 are arranged as a columnar structure, and the first direction is the columnar direction of the column.

[0056] The conducting structure includes an annular groove for connection and an ungrooved cylindrical portion for blocking, which are sequentially arranged along the first direction, and the annular groove is provided on the circumference of the intermediate shaft 2:

[0057] In the gas release state, the intermediate shaft 2 is driven by the gas pressure in the control chamber to overcome the spring force of the spring 8 and move in the first direction until the air inlet 12 is connected with the air outlet 11 through the annular groove;

[0058] In the non-gas release state, the intermediate shaft 2 is not driven by the air pressure in the control chamber. Under the action of overcoming the spring force of the spring 8, the air inlet 12 and the air outlet 11 are both blocked by the ungrooved cylindrical portion of the intermediate shaft 2 where no annular groove is provided, so that the air inlet 12 cannot be connected to the air outlet 11 through the annular groove.

[0059] Each ungrooved cylindrical portion has a sealing ring groove 21 for installing a sealing ring, and a sealing ring is installed in the sealing ring groove 21, so that the ungrooved cylindrical portion and the inner wall of the ventilation chamber are sealed and connected through the sealing ring. The sealing ring is installed in the sealing ring groove 21 on the intermediate shaft to ensure that the intermediate shaft fits the inner wall of the chamber and ensures air tightness.

[0060] The air inlet 12 and the air outlet 11 in the same group of air inlet and outlet are located on the same circumference of the ventilation chamber body 1. Furthermore, the air inlet 12 and the air outlet 11 in the same group of air inlet and outlet are not exactly located on the same circumference of the ventilation chamber body 1, and the distance between the air inlet 12 and the air outlet 11 in the same group of air inlet and outlet along the first direction is less than the width of the annular groove.

[0061] In a specific implementation, a plurality of groups of air inlets and outlets are provided on the ventilation chamber body 1, and the intermediate shaft 2 is provided with the same number of conducting structures as the number of the groups of air inlets and outlets, and one group of air inlets and outlets corresponds to one conducting structure.

[0062] The intermediate shaft 2 is provided with multiple conducting structures in the first direction, and the annular grooves and the multiple column parts of the multiple conducting structures are alternately arranged in sequence along the first direction. The ventilation chamber body 1 is also provided with multiple air outlets 11 and multiple air inlets 12.

[0063] The ventilation chamber body 1 is provided with an inner flange inside the ventilation chamber for limiting the movement of the intermediate shaft 2. The inner flange is embedded in the annular groove of the intermediate shaft 2 and can limit the limit position of the movement of the intermediate shaft 2 along the first direction. In a specific implementation, the inner flange can be provided near the end of the intermediate shaft 2.

[0064] At one end of the intermediate shaft 2 near the connection between the second gas pipeline 4 and the ventilation chamber, in a sub-chamber near the connection between the second gas pipeline 4 and the ventilation chamber, which is isolated by the inner flange of the ventilation chamber body 1 and has at least one structural part similar to an outer flange, and the cross-sectional shape and area are the same as those of the ventilation chamber, and the structural part similar to the outer flange is formed by an annular groove, and the structural part similar to the outer flange and the inner wall of the ventilation chamber can be sealed and connected by a sealing ring.

[0065] 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:

[0066] When gas release is not performed, no gas enters the first gas pipeline 3 at the end that is not connected to the pressure-stabilizing chamber 5, and the gas entering the first gas pipeline 3 does not input gas into the control chamber through the second gas pipeline 4. The air pressure in the control chamber does not increase, and thus the intermediate shaft 2 cannot be pushed to move toward the root end along the first direction. Under the action of the spring 8, the intermediate shaft 2 returns to the normal position in the reverse direction along the first direction, that is, the air inlet 12 of the same group of air inlets and outlets cannot be connected to the air outlet 11 through the annular groove, but is blocked by the ungrooved column portion, and the gas pipeline is not conductive and ventilated, and is in a state of no gas release.

[0067] When gas release is required, the first gas pipeline 3 enters gas at the end that is not connected to the pressure stabilizing chamber 5. The gas entering the first gas pipeline 3 is input into the control chamber through the second gas pipeline 4, increasing the air pressure in the control chamber and pushing the intermediate shaft 2 to move toward the root end along the first direction. The spring 8 is compressed, and the intermediate shaft 2 moves until the air inlet 12 of the same group of air inlets and outlets is connected to the air outlet 11 through the annular groove; at the same time, the first gas pipeline 3 directly vents into the pressure stabilizing chamber 5, and the pressure stabilizing chamber 5 is directly connected to the air inlet 12. In this way, the gas entering the first gas pipeline 3 passes through the pressure stabilizing chamber 5 and the annular groove of the air inlet 12 in turn and then passes out from the air outlet 11. The gas pipeline is connected to achieve ventilation, which is a gas release state. When releasing gas on the hull surface, gas lubrication and drag reduction can be achieved.

[0068] After the gas starts to be released, most of the gas entering the first gas pipeline 3 flows through the first gas pipeline 3, the pressure-stabilizing chamber 5, the air inlet 12, the annular groove, and then is discharged from the air outlet 11. The air flow quickly flows through the first gas pipeline 3, the pressure-stabilizing chamber 5, the air inlet 12, the annular groove and the air outlet 11 in sequence. The pressure drop in the first gas pipeline 3 is greater than the pressure drop in the second gas pipeline 4. Therefore, the pressure in the second gas pipeline 4 will always be higher than the pressure of the gas flowing through the first gas pipeline 3, the pressure-stabilizing chamber 5, the air inlet 12, the annular groove and the air outlet 11, so that it can always remain in a gas release state.

[0069] When the gas release is to be stopped, the gas supply to the first gas pipeline 3 is stopped, the gas pressure in the control chamber drops, the spring 8 rebounds, the intermediate shaft 2 returns to its original position, and the gas outlet 11 is automatically closed.

Claims

1. A gas release device for a wading navigation body that can be automatically opened and closed passively, characterized in that: It comprises a ventilation chamber body (1) having a ventilation chamber therein, wherein the ventilation chamber body (1) is provided with at least one group of air inlets and outlets on a side wall along a first direction, each group of air inlets and outlets comprising an air inlet (12) and an air outlet (11) respectively provided on two sides of the ventilation chamber body (1) along the first direction; It comprises an intermediate shaft (2) which is freely movable in a first direction and is installed in the ventilation chamber; It comprises a pressure stabilizing chamber (5), which is arranged on a side of the ventilation chamber body (1) where the air inlet (12) is provided and is in communication with the air inlet (12); It comprises a first gas pipeline (3) which is connected to a pressure stabilizing chamber (5); It comprises a second gas pipeline (4) which is connected to the first gas pipeline (3) and the ventilation chamber respectively; A relatively closed space is formed between the end of the intermediate shaft (2) and the inner end surface of the ventilation chamber as a control chamber, and the second gas pipeline (4) is connected between the middle part of the first gas pipeline (3) and the control chamber; The intermediate shaft (2) is provided with a conducting structure for moving in a first direction to cooperate and connect the air inlet (12) and the air outlet (11) in the same group of air inlet and outlet; The conducting structure comprises an annular groove and an ungrooved portion arranged in sequence along a first direction, wherein the annular groove is provided on the circumferential surface of the intermediate shaft (2): In the gas release state, the gas inlet (12) is connected to the gas outlet (11) via the annular groove; In a non-gas-releasing state, the air inlet (12) and the air outlet (11) are both blocked by the ungrooved portion of the intermediate shaft (2) where no annular groove is provided, so that the air inlet (12) cannot communicate with the air outlet (11) via the annular groove.

2. The gas release device for automatic passive opening and closing of a wading navigation body according to claim 1, characterized in that: One end of the first gas pipeline (3) is connected to the pressure stabilizing chamber (5), and the other end is connected to an external gas source.

3. The gas release device for automatic passive opening and closing of a wading navigation body according to claim 1 is characterized in that: It also includes a spring (8) which is arranged in a ventilation chamber close to the root end of the intermediate shaft (2), with two ends respectively connected between the root end of the intermediate shaft (2) and the inner end surface of the ventilation chamber.

4. The gas release device for automatic passive opening and closing of a wading navigation body according to claim 1 is characterized in that: The ventilation chamber near the root end of the intermediate shaft (2) is connected to the outside through a branch pipeline.

5. The gas release device for automatic passive opening and closing of a wading navigation body according to claim 1 is characterized in that: The outer peripheral surface of the ungrooved portion is provided with a sealing ring groove (21) for installing a sealing ring, and the sealing ring is installed in the sealing ring groove (21), so that the ungrooved portion and the inner wall of the ventilation chamber are sealed and connected via the sealing ring.

6. The gas release device for automatic passive opening and closing of a wading navigation body according to claim 1 is characterized in that: The air inlet (12) and the air outlet (11) in the same group of air inlet and outlet are located on the same circumference of the ventilation chamber body (1).

7. The gas release device for automatic passive opening and closing of a wading navigation body according to claim 1 is characterized in that: The air inlet (12) and the air outlet (11) in the same group of air inlet and outlet are not exactly located on the same circumference of the ventilation chamber body (1), and the distance between the air inlet (12) and the air outlet (11) in the same group of air inlet and outlet along the first direction is smaller than the width of the annular groove.

8. The gas release device for automatic passive opening and closing of a wading navigation body according to claim 1 is characterized in that: The ventilation chamber body (1) is provided with a plurality of groups of air inlets and outlets, and the intermediate shaft (2) is provided with the same number of conducting structures as the number of the groups of air inlets and outlets.

9. The gas release device for automatic passive opening and closing of a wading navigation body according to claim 1, characterized in that: The intermediate shaft (2) is provided with a plurality of conducting structures in the first direction.

10. The gas release device for automatic passive opening and closing of a wading navigation body according to claim 1, characterized in that: The ventilation chamber body (1) is provided with an inner flange inside the ventilation chamber for limiting the movement of the intermediate shaft (2), and the inner flange is embedded in an annular groove formed on the intermediate shaft (2).

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