Tail gas seal structure of hovercraft

Abstract

A tail gas seal structure of a hovercraft comprises a tail gas seal body installed at the tail of a hovercraft body, spacers inside the tail gas seal body divide an inner cavity into a plurality of bag bodies, vent holes are formed in the spacers, the side, facing a prow, of the tail gas seal body inclines, the other side of the tail gas seal body is in an arc shape, and the tail gas seal body is further provided with a gas outlet hole. The tail gas seal body of the multi-layer structure has high strength, the inclined side of the tail gas seal body can be matched with the sailing direction and the airflow direction of a hovercraft, resistance can be effectively reduced, when the tail gas seal body is pressed due to obstacles, redundant gas can be exhausted through the gas outlet holes, and therefore buffering is achieved, and impact force is reduced. Through the arrangement of the tail gas seal structure of the hovercraft, the sailing of the hovercraft can be better matched, the sailing resistance is reduced, the sailing stability speed is improved, the obstacle environment can be better coped, and the sailing safety is improved.

Description

Technical Field

[0001] The invention relates to an air cushion vehicle, in particular to a tail air seal structure of the air cushion vehicle. Background Art

[0002] A hovercraft is a high-speed ship that uses the surface effect principle to form an air cushion so that the hull can sail away from the support surface. In addition to being equipped with an engine and a propeller, the hovercraft also has an air chamber with an air outlet at the bottom and a skirt surrounding the edge. High-pressure air is sent into the air chamber through a pipeline and then ejected from the air outlet. At the same time, the apron blocks the ejected airflow, thereby forming an air cushion layer to hold up the hull. The engine then drives the propeller to make the ship sail close to the support surface. However, since the force directions of the bow, sidewalls and tail of the hovercraft are different when sailing, and the way they interact with the airflow is different, the tail skirt is prone to wave resistance when sailing on the water, which in turn affects the stability and safety of the hovercraft's navigation, and also has an adverse effect on the power and speed of the hovercraft; at the same time, the existing skirt has poor deformation capacity, which is not only prone to shaking when dealing with impact or crossing obstacles, but also affects the speed and stability of navigation. Summary of the invention

[0003] The purpose of the present invention is to provide a deformable tail gas seal structure so that the hovercraft can be deformed in time when encountering an emergency, thereby reducing the resistance of navigation and improving the navigation stability of the hovercraft.

[0004] The stern gas seal structure of the hovercraft described in the present invention comprises a tail gas seal body installed at the stern of the hull, the interior of the tail gas seal body is hollow and the top is connected to the air supply device of the hovercraft, the inner side of the tail gas seal body is an inclined surface arranged obliquely, the outer side of the tail gas seal body comprises a plurality of bag segments connected end to end and protruding outward in the middle, a partition is connected to the inner wall of the joint of adjacent bag segments, the partition extends to the inner wall surface of each side of the tail gas seal body, and a vent hole connecting the upper and lower ends is opened on the partition, and an outlet hole for discharging high-pressure gas is also opened on the bottom bag segment.

[0005] Furthermore, a stern hole is formed on the bottom sac section, and a blocking piece is provided on the inner wall of the sac section above the stern hole, wherein the lower end of the blocking piece droops naturally and can block the inner side of the stern hole.

[0006] Furthermore, the air outlet is arranged at the bottom of the bottom bag section, and the bottom of the inclined surface or the bag section is provided with an anti-wear sheet extending toward the stern and covering the outside of the air outlet in front of the air outlet.

[0007] Furthermore, a regulator with an adjustable opening diameter is installed on the bottom bag section, and the air outlet is arranged on the regulator.

[0008] Furthermore, the top of the tail gas seal body is hinged to the hull.

[0009] Furthermore, a clamping plate is installed at the bottom of the hull, and a transversely arranged clamping hole is provided at the end of the clamping plate. A clamping slot connecting the outer wall and the clamping hole is also opened on the clamping plate. The diameter of the top end of the exhaust gas sealing body is larger than the width of the clamping slot and smaller than the diameter of the clamping hole, and a fixing hole parallel to the direction of the clamping hole is opened at the top end of the exhaust gas sealing body. The clamping strip passes through the fixing hole and rotatably fixes the top end of the exhaust gas sealing body in the clamping hole.

[0010] Furthermore, the clamping strip is a rubber strip.

[0011] Furthermore, a reinforcing sheet is installed on the outer wall where adjacent bladder segments are connected.

[0012] Furthermore, the material of the reinforcing sheet is the same as that of the tail gas seal body, and the reinforcing sheet is glued to the concave position of the outer wall where the two bag sections are connected.

[0013] Furthermore, the junction of the two bag sections of the spacer extends upwardly and obliquely toward the inner wall of the slope.

[0014] According to the stern air seal structure of the air cushion craft described in the present invention, the air cushion craft sends high-pressure air into the air chamber at the bottom of the hull, and then forms an air cushion layer at the bottom; the tail air seal body can block and enclose the air flow of the air cushion layer, thereby forming a more effective air cushion to hold up the hull; at the same time, the inner side of the tail air seal body, that is, the side facing the bow, is set as an inclined surface, which can effectively reduce the resistance in accordance with the navigation direction and air flow direction of the air cushion craft; and when the tail air seal body is compressed by an obstacle, the excess gas can be discharged through the air outlet, thereby achieving buffering and reducing the impact force, and after passing the obstacle, the air supply device in the air cushion craft can re-fill the tail air seal body with high-pressure air to make the tail air seal body expand again; in addition, the outer side of the tail air seal body, that is, the side facing away from the bow, is set as a plurality of capsule sections, and the internal spacer is used to separate the internal space of the tail air seal body into a plurality of capsules, which can not only improve the structural strength of the tail air seal body, but also form a stronger buffering effect in the upper capsule, while the lower capsule has a faster deformation ability, thereby improving the impact resistance. Therefore, by setting up the stern air seal structure of the hovercraft, the navigation of the hovercraft can be better coordinated, the navigation resistance can be reduced and the speed of navigation stability can be improved, and the obstacle environment can be better coped with, thereby improving the safety of navigation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the stern air seal structure of the air cushion craft.

[0016] Figure 2 It is a schematic diagram of the configuration of the stern air seal structure of the hovercraft installed on the hovercraft.

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the stern air seal structure of the air cushion craft.

[0018] Figure 4 , 5 They are Figure 3 A schematic diagram of the partial structure of the stern air seal structure of the air cushion craft is shown. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] If there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] The invention provides an air seal structure at the stern of an air cushion craft.

[0023] The stern gas seal structure of the hovercraft of this embodiment comprises a tail gas seal body 2 installed at the stern of the hull 1, the interior of the tail gas seal body is hollow and the top is connected to the air supply device of the hovercraft, the inner side of the tail gas seal body is an inclined surface 3 arranged obliquely, the outer side of the tail gas seal body comprises a plurality of bladder segments 4 connected end to end and protruding outward in the middle, a spacer 5 is connected to the inner wall of the joint of adjacent bladder segments, the spacer extends to the inner wall surface of each side of the tail gas seal body, and a vent hole 51 connecting the upper and lower ends is opened on the spacer, and an outlet hole 6 for discharging high-pressure gas is also opened on the bottom bladder segment.

[0024] like Figure 1-5As shown, the hovercraft sends high-pressure air into the air chamber at the bottom of the hull, and then forms an air cushion layer at the bottom; the tail gas seal body can block and enclose the airflow of the air cushion layer, thereby forming a more effective air cushion to hold up the hull; at the same time, the inner side of the tail gas seal body, that is, the side facing the bow, is set as an inclined surface, which can effectively reduce the resistance in conjunction with the navigation direction and airflow direction of the hovercraft; and when encountering an obstacle that causes the tail gas seal body to be pressurized, the excess gas can be discharged through the air outlet, thereby achieving buffering and reducing the impact force. After passing the obstacle, the air supply device in the hovercraft can re-fill the tail gas seal body with high-pressure air to make the tail gas seal body expand again; in addition, the outer side of the tail gas seal body, that is, the side facing away from the bow, is set as a plurality of capsule sections, and cooperates with the internal spacer to separate the internal space of the tail gas seal body into a plurality of capsules, which can not only improve the structural strength of the tail gas seal body, but also the upper capsule can form a stronger buffering effect, while the lower capsule has a faster deformation ability, thereby improving the impact resistance.

[0025] The tail gas seal structure of the air cushion craft, the top of the tail gas seal body 2 can be fixedly installed on the hull, or can be hinged to the hull 1 through a rotating shaft, a hook and other devices, specifically as follows Figure 3 , 4 As shown, a clamping plate 11 is installed at the bottom of the hull 1, and a horizontally arranged clamping hole 12 is provided at the end of the clamping plate. A clamping port 13 connecting the outer wall and the clamping hole is also provided on the clamping plate. The diameter of the top end of the exhaust gas sealing body 2 is larger than the width of the clamping port and smaller than the diameter of the clamping hole, and a fixing hole parallel to the direction of the clamping hole is provided at the top end of the exhaust gas sealing body. The clamping strip 7 passes through the fixing hole and expands the top end of the exhaust gas sealing body, so that it can be rotatably fixed in the clamping hole of the clamping plate. This can not only achieve the hinge effect, but also utilize the deformability of the exhaust gas sealing body for fixing, and ensure the deformation and buffering capacity of the exhaust gas sealing body when encountering obstacles, and it is easy to install and fix, and assemble and disassemble. At the same time, the clamping strip 7 is a rubber strip, so as to better ensure the deformation capacity.

[0026] The air cushion craft tail gas seal structure has a protruding middle portion of the bag segment to form an arc-shaped structure. A reinforcing sheet 8 may be installed on the outer wall where adjacent bag segments 4 are connected. The reinforcing sheet 8 is made of the same material as the tail gas seal body 2, and is glued to the concave position of the outer wall where the two bag segments 4 are connected. The shape is selected according to the requirements of the tail gas seal, for example Figure 3 As shown, the reinforcing sheet 8 is a V-shaped structure, the bottom of which is located at the concave part where the two bladder segments 4 meet, and the two sides are respectively in close contact with the outer walls of the two bladder segments, thereby improving the structural strength of the tail gas seal body. The spacer 5 extends upward from the junction of the two bladder segments 4 toward the inner wall of the inclined surface 3, so that it is consistent with the inclined direction of the inclined surface, thereby better matching the navigation direction of the hovercraft and the direction of the impact force when encountering obstacles, forming a more effective and stable buffering effect.

[0027] In the air cushion craft stern air seal structure, the air outlet 6 is arranged at the bottom of the bottom bag section 4, which can form an air film when exhausting air and can smoothly discharge the accumulated water when water accumulates; at the same time, the bottom of the inclined surface 3 or the bag section 4 is located in front of the air outlet, that is, at a position on the side facing the bow, and is provided with an anti-wear sheet 9 extending toward the stern and covering the outside of the air outlet, so as to ensure the exhaust performance while ensuring the air outlet and avoid clogging of the air outlet. The anti-wear sheet 9 can be made of the same material as the tail gas seal body 2, or it can be formed integrally with the tail gas seal body, and it can also be made of wear-resistant material to increase its service life. In addition, a regulator with adjustable opening diameter can be installed on the bottom bag section 4, and the air outlet 6 is arranged on the regulator, so as to change the aperture of the air outlet, thereby adjusting the responsiveness of the hovercraft skirt. The greater the responsiveness, the better the deformation ability. In addition, a stern hole 41 is also opened on the bottom bag section 4, and a baffle 42 is installed on the inner wall of the bag section above the stern hole. The lower end of the baffle naturally droops and can cover the inner side of the stern hole. When the air pressure in the tail gas seal body is sufficient, the lower end of the baffle will be pressed against the stern hole by the air pressure, thereby closing the stern hole. When the tail gas seal body is drastically deformed, the air pressure in the tail gas seal body is exhausted in large quantities, the internal air pressure is reduced, and the baffle will no longer be able to continue to be pressed against the stern hole, thereby exposing a gap for exhaust, which can help to discharge the internal gas more quickly and improve the buffering effect.

[0028] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air seal structure at the stern of an air cushion craft, characterized in that: The invention comprises an exhaust gas seal body (2) installed at the rear of a ship body (1), the interior of the exhaust gas seal body is hollow and the top is connected to the air supply device of the hovercraft, the inner side of the exhaust gas seal body is an inclined surface (3), the outer side of the exhaust gas seal body comprises a plurality of bag segments (4) connected end to end and protruding outward in the middle, a spacer (5) is connected to the inner wall of the adjacent bag segments, the spacer extends to the inner wall surface of each side of the exhaust gas seal body, and a vent hole (51) connecting the upper and lower ends is opened on the spacer, and an outlet hole (6) for discharging high-pressure gas is also opened on the bottom bag segment.

2. The air cushion craft stern air seal structure according to claim 1, characterized in that: A stern hole (41) is formed on the bottom sac section (4), and a blocking sheet (42) is provided on the inner wall of the sac section above the stern hole, wherein the lower end of the blocking sheet droops naturally and can block the inner side of the stern hole.

3. The stern air seal structure of the air cushion craft according to claim 1, characterized in that: The air outlet (6) is arranged at the bottom of the bottom bag section (4), and the bottom of the inclined surface (3) or the bag section (4) is provided with an anti-wear sheet (9) extending toward the stern and covering the outside of the air outlet at the front of the air outlet.

4. The stern air seal structure of the air cushion craft according to claim 2 or 3, characterized in that: A regulator with an adjustable opening diameter is installed on the bottom bag section (4), and the air outlet hole (6) is arranged on the regulator.

5. The stern air seal structure of an air cushion craft according to claim 1, 2 or 3, characterized in that: The top of the tail gas seal body (2) is hinged to the hull (1).

6. The stern air seal structure of the air cushion craft according to claim 5, characterized in that: A clamping plate (11) is installed at the bottom of the hull (1), and a clamping hole (12) is arranged transversely at the end of the clamping plate. A clamping opening (13) connecting the outer wall and the clamping hole is also provided on the clamping plate. The diameter of the top end of the exhaust gas seal body (2) is larger than the width of the clamping opening and smaller than the diameter of the clamping hole. A fixing hole parallel to the clamping hole is provided at the top end of the exhaust gas seal body. The clamping strip (7) passes through the fixing hole and rotatably fixes the top end of the exhaust gas seal body in the clamping hole.

7. The stern air seal structure of the air cushion craft according to claim 6, characterized in that: The clamping strip (7) is a rubber strip.

8. The stern air seal structure of an air cushion craft according to claim 1, 2 or 3, characterized in that: A reinforcing sheet (8) is installed on the outer wall of the joint between adjacent bladder segments (4).

9. The air seal structure at the stern of an air cushion craft according to claim 8, characterized in that: The reinforcing sheet (8) is made of the same material as the tail gas seal body (2), and the reinforcing sheet is glued to the concave position of the outer wall where the two bag sections (4) are connected.

10. The stern air seal structure of an air cushion craft according to claim 1, 2 or 3, characterized in that: The junction of the two capsule sections (4) of the partition (5) extends obliquely upward toward the inner wall of the inclined surface (3).

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