Aircraft Pyrotechnic Ejection Safety and Release Components

Abstract

This invention provides a safety and release assembly for an aircraft pyrotechnic ejection system, comprising: an insulating shell, a trigger sleeve, and a pyrotechnic actuator. The pyrotechnic actuator is slidably mounted axially within the insulating shell, and the trigger sleeves are slidably mounted radially on both sides of the insulating shell. The trigger sleeves abut against the periphery of the pyrotechnic actuator under elastic force. The pyrotechnic actuator includes: a metal conductor and an insulating profile, with the metal conductor mounted on the insulating profile. By axially moving the pyrotechnic actuator, when the trigger sleeve abuts against the insulating profile, it is in a non-conductive state; when the trigger sleeve abuts against the metal conductor, it is in a conductive state. During the storage and transportation of the aircraft launch tube, the pyrotechnic actuator is not activated. The trigger sleeves are in contact with the corresponding inclined surfaces of the insulating profile, and the terminals at both ends are in an insulated state. Even if a misoperation occurs during equipment maintenance or repair, the launch control circuit will not conduct, thus providing a safety guarantee.

Description

Technical Field

[0001] This invention relates to the field of pyrotechnic catapults for aircraft, and more specifically, to safety and release components for pyrotechnic catapults for aircraft. Background Technology

[0002] Currently, cold launches of aircraft mostly use gas generators as the power source, with the launch control circuit directly connected to the gas generator's 4-core igniter. For example, patent CN202204886U illustrates an integrated test bench for aircraft pyrotechnics. During launch, the control circuit uses the gas to perform work, ejecting the aircraft from the launch tube in a specific attitude to achieve in-flight engine ignition. However, during storage or transportation, because the launch control circuit is directly connected to the gas generator's igniter, misoperation during maintenance or repair of the launch control equipment could cause the gas generator to ignite, resulting in the gas performing work and ejecting the aircraft from the launch tube, causing catastrophic consequences. Such incidents have occurred before. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a safety and release component for aircraft pyrotechnic ejection.

[0004] According to the present invention, a flight vehicle pyrotechnic ejection safety and release assembly includes: an insulating shell, a trigger sleeve, and a pyrotechnic actuator cylinder;

[0005] The ignition working cylinder is slidably installed axially inside the insulating housing, and the trigger sleeves are slidably installed radially on both sides inside the insulating housing. The trigger sleeves on both sides abut against the periphery of the ignition working cylinder under the action of elasticity.

[0006] The fire-operated cylinder includes: a metal conductor and an insulating irregular body, wherein the metal conductor is installed on the insulating irregular body;

[0007] By axially moving the firing cylinder, when the trigger sleeve abuts against the insulating irregular body, it is in a non-conductive state; when the trigger sleeve abuts against the metal conductor, it is in a conductive state.

[0008] Preferably, the insulating housing has an elongated hole along the axial direction, one end of the elongated hole is connected to a square hole, and the periphery of the insulating housing has a trigger sleeve hole communicating with the elongated hole along the radial direction.

[0009] Preferably, one end of the insulating irregular body is configured as a cuboid, and the other end is threaded to one side of the metal cylindrical section through a second threaded hole, and a flange is provided on the other side of the metal cylindrical section;

[0010] The insulating irregular body and the metal cylindrical section are axially slidably installed in the elongated hole, the cuboid is slidably installed in the square hole, and the fire working cylinder is installed on the insulating shell through a flange.

[0011] Preferably, the insulating irregular body is composed of a plurality of radially protruding protrusions on a column, the side surface of the protrusion is set as a flat straight surface, and the straight surface is connected to the side surface of the column by a smooth inclined surface;

[0012] The bump is provided with a through hole in the radial direction that connects the two straight surfaces. The metal conductor is installed in the through hole and extends to the straight surfaces on both sides at both ends.

[0013] Preferably, the trigger sleeve includes: a terminal block, a cover plate, a cylindrical head, a rod, a compression spring, and a shoulder;

[0014] One end of the rod is connected to the terminal block, and the other end is connected to the cylindrical head through the first threaded hole. A shoulder is provided between the rod and the terminal block. The cover plate is sleeved on the rod and located between the shoulder and the cylindrical head. The compression spring is sleeved on the rod, with one end of the compression spring abutting against the cylindrical head and the other end abutting against the cover plate. The shoulder allows for axial positioning by means of the cover plate.

[0015] Preferably, the rod and the cylindrical head are slidably installed in the trigger sleeve hole, the cylindrical head abuts against the periphery of the insulating irregular body under the action of the compression spring, and the trigger sleeve is installed on the insulating housing through the cover plate.

[0016] Preferably, the cylindrical head has a conical surface at one end facing the insulating irregular body, and the top surface of the conical surface that contacts the insulating irregular body is a flat end face.

[0017] Preferably, multiple trigger sleeve holes are provided on both sides of the elongated hole, and the trigger sleeve holes on both sides are in pairs and are completely identical, and the trigger sleeve holes on both sides are symmetrical about the center line;

[0018] The trigger sleeves on both sides are in pairs and are completely identical, and the trigger sleeves on both sides are symmetrical about the center line;

[0019] The insulating irregular body has multiple metal conductors, and the distance between adjacent metal conductors is equal to the distance between adjacent trigger sleeve holes on the same side.

[0020] Preferably, the cylindrical body of the insulating irregular body has multiple inclined surfaces and straight surfaces on both sides. The inclined surfaces on both sides are paired and identical, and the inclined surfaces on both sides are symmetrical about the center line. The straight surfaces on both sides are paired and identical, and the straight surfaces on both sides are symmetrical about the center line.

[0021] Preferably, the trigger sleeve on one side of the insulating housing is connected to the emission control circuit, and the trigger sleeve on the other side is connected to the igniter of the gas generator.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In this application, when the aircraft launch tube is in storage and transport operation, the ignition trigger cylinder is not operational, the trigger sleeve is in contact with the corresponding beveled surface of the insulating profile, and the terminals at both ends are in an insulated state. Even if a misoperation occurs during equipment maintenance or repair, the launch control circuit will not conduct, thus providing a safety guarantee. Only when the aircraft launch tube is in the launch operation state, and the trigger sleeve is in contact with the metal conductor on the insulating profile, does the launch control circuit conduct with the gas generator, thus releasing the safety guarantee. Attached Figure Description

[0024] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 A schematic diagram of the fuse and deactivation components in the insulation state;

[0026] Figure 2 A schematic diagram of the fuse and release components in the on state;

[0027] Figure 3 This is a schematic diagram of the insulating shell structure;

[0028] Figure 4 This is a schematic diagram of the trigger sleeve structure;

[0029] Figure 5 Schematic diagram of the working cylinder for ignition;

[0030] Figure 6 Side view schematic diagram of the working cylinder for ignition;

[0031] As shown in the figure:

[0032] Detailed Implementation

[0033] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0034] Example 1

[0035] like Figure 1-2As shown, this embodiment includes: an insulating housing 10, a trigger sleeve 20, and a ignition actuator 30. The ignition actuator 30 is axially slidably installed inside the insulating housing 10, and the trigger sleeves 20 are slidably installed radially on both sides inside the insulating housing 10. The trigger sleeves 20 on both sides abut against the periphery of the ignition actuator 30 under the action of elasticity. One trigger sleeve 20 on one side of the insulating housing 10 is connected to the firing control circuit, and the other trigger sleeve 20 is connected to the igniter of the gas generator. By axially moving the ignition actuator 30, when the trigger sleeve 20 abuts against the insulating irregular body 38 of the ignition actuator 30, it is in a non-conductive state; when the trigger sleeve 20 abuts against the metal conductor 32 of the ignition actuator 30, it is in a conductive state.

[0036] like Figure 3 As shown, the insulating housing 10 has an elongated hole 12 along the axial direction, one end of which is connected to a square hole 11, and the periphery of the insulating housing 10 has a trigger sleeve hole 13 that communicates with the elongated hole 12 along the radial direction.

[0037] like Figure 4 As shown, the trigger sleeve 20 includes: a terminal 21, a cover plate 22, a cylindrical head 23, a rod 27, a compression spring 28, and a shoulder 29. One end of the rod 27 is connected to the terminal 21, and the other end is connected to the cylindrical head 23 through a first threaded hole 26. The shoulder 29 is provided between the rod 27 and the terminal 21. The cover plate 22 is sleeved on the rod 27 and located between the shoulder 29 and the cylindrical head 23. The compression spring 28 is looped around the rod 27, with one end abutting against the cylindrical head 23 and the other end abutting against the cover plate 22. The shoulder 29 allows for axial positioning via the cover plate 22. The rod 27 and the cylindrical head 23 are slidably installed in the trigger sleeve hole 13. Under the elastic force of the compression spring 28, the cylindrical head 23 abuts against the periphery of the insulating profile 38. The trigger sleeve 20 is installed on the insulating housing 10 via the cover plate 22. The cylindrical head 23 has a conical surface 24 at one end facing the insulating irregular body 38, and the top surface of the conical surface 24 that contacts the insulating irregular body 38 is a flat end face 25.

[0038] like Figure 5-6As shown, the fire-operated cylinder 30 includes a metal conductor 32 and an insulating irregular body 38. The metal conductor 32 is mounted on the insulating irregular body 38. One end of the insulating irregular body 38 is configured as a cuboid 35, and the other end is threaded to one side of a metal cylindrical section 33 through a second threaded hole 36. A flange 37 is provided on the other side of the metal cylindrical section 33, and the metal cylindrical section 33 can slide relative to the flange 37. The insulating irregular body 38 and the metal cylindrical section 33 are axially slidably installed in an elongated hole 12, and the cuboid 35 is slidably installed in a square hole 11. The fire-operated cylinder 30 is mounted on the insulating shell 10 through the flange 37. The insulating irregular body 38 is composed of multiple radially protruding protrusions on a column. The sides of the protrusions are configured as flat straight surfaces 34, and the straight surfaces 34 are transitioned to the sides of the column through a smooth inclined surface 31. The protrusions are radially provided with through holes connecting the two straight surfaces 34. The metal conductor 32 is installed in the through holes and extends to the straight surfaces 34 on both sides.

[0039] In one embodiment, multiple trigger sleeve holes 13 are provided on both sides of the elongated hole 12. The trigger sleeve holes 13 on both sides are paired and identical, and the trigger sleeve holes 13 on both sides are symmetrical about the center line. The trigger sleeves 20 on both sides are paired and identical, and the trigger sleeves 20 on both sides are symmetrical about the center line. Multiple inclined surfaces 31 and straight surfaces 34 are provided on both sides of the cylindrical body of the insulating irregular body 38. The inclined surfaces 31 on both sides are paired and identical, and the inclined surfaces 31 on both sides are symmetrical about the center line. The straight surfaces 34 on both sides are paired and identical, and the straight surfaces 34 on both sides are symmetrical about the center line. Multiple metal conductors 32 are provided on the insulating irregular body 38, and the distance between adjacent metal conductors 32 is equal to the distance between adjacent trigger sleeve holes 13 on the same side.

[0040] Working principle:

[0041] When the launch tube of the aircraft is in storage and transportation working state, the firing cylinder 30 is not working. Under the action of the compression spring 28, the trigger sleeve 20 is in contact with the corresponding inclined surface 31 or the side of the column of the insulating irregular body 38, so that the trigger sleeves 20 on both sides are in a mutually insulated state. Even if the launch control circuit is misoperated during equipment maintenance and protection, it will not be connected, which plays a safety and insurance role.

[0042] When the launch tube of the aircraft is in the launch working state, the ignition actuator 30 is activated first. The piston rod (insulating body 38) of the ignition actuator 30 extends, and the inclined surface 31 of the insulating body 38 pushes the trigger sleeves 20 on both sides to slide back. As the piston rod extends into place, the trigger sleeves 20 are in contact with the end face of the metal conductor 32 on the insulating body 38 under the action of the compression spring 28. The launch control circuit is connected to the igniter of the gas generator, and the safety lock is released.

[0043] Example 2

[0044] Example 2 is a preferred example of Example 1.

[0045] like Figure 3 As shown, the insulating housing 10 has eight identical, paired, symmetrical trigger sleeve holes 13 on both sides. The insulating housing 10 also has symmetrical elongated holes 12 on the center line and square holes 11 at the ends of the elongated holes 12.

[0046] like Figure 4 As shown, the trigger sleeve 20 consists of a terminal 21, a cover plate 22, a cylindrical head 23, and a compression spring 28. The rod 27 belonging to the terminal 21 passes through the hole of the cover plate 22. One side of the cover plate 22 abuts against the shoulder 28 on the side of the terminal 21 under the action of the compression spring 28. The compression spring 28 is sleeved on the rod 27. The right end of the rod 27 is connected to the cylindrical head 23 by a thread. One end of the compression spring 28 is in contact with the cover plate 22, and the other end is in contact with the cylindrical head 23. The top of the conical surface 24 of the cylindrical head 23 is flattened to form a flat end face 25. Under the action of the compression spring 28, the cylindrical head 23 can slide freely relative to the cover plate 22.

[0047] like Figure 5-6 As shown, the piston rod of the ignition actuator 30 consists of a cylindrical metal section 33 and an insulating profile 38. The insulating profile 38 is connected to the cylindrical metal section 33 by applying thread-locking adhesive through a second threaded hole 36. The end of the insulating profile 38 is a cuboid 35 with a square cross-section. In the middle are eight identical, paired, equally spaced, and symmetrically oriented inclined surfaces 31, and eight identical, paired, equally spaced, and symmetrically oriented straight surfaces 34 that smoothly transition to the inclined surfaces 31. Four fully threaded cylindrical metal conductors 32 are screwed into the corresponding through holes of the insulating profile 38 with thread-locking adhesive, and their end faces are flush. After the ignition actuator 30 is ignited, the cylindrical metal section 33 of the piston rod can extend freely to a specified position and be reliably locked.

[0048] During the insertion of the piston rod of the firing cylinder 30 into the insulating housing 10, the cylindrical metal section 33 should slide freely without jamming within the elongated hole 12 of the insulating housing 10; the cuboid 35 on the insulating irregular body 38 should slide freely without jamming within the square hole 11 of the insulating housing 10; then, the firing cylinder 30 is screwed and fixed to the insulating housing 10 via the flange 37. During the insertion of the eight trigger sleeves 20 into the eight trigger sleeve holes 13 of the insulating housing 10, the cylindrical head 23 should slide freely without jamming within the trigger sleeve holes 13 of the insulating housing 10; then, the cover plate 22 is screwed and fixed to the insulating housing 10.

[0049] In one embodiment, the elongated hole 12 of the insulating housing 10 is in sliding clearance fit with the piston rod of the ignition working cylinder 30, the rectangular hole 11 of the insulating housing 10 is in sliding clearance fit with the cuboid 35 on the ignition working cylinder 30, the trigger sleeve hole 13 of the insulating housing 10 is in sliding clearance fit with the cylindrical surface of the cylindrical head 23 of the trigger sleeve 20, and the conical surface 24 of the trigger sleeve 20 is adapted to the shape of the corresponding inclined surface 31 of the insulating irregular body 38.

[0050] In one embodiment, the distance between adjacent trigger holes 13 of the insulating housing 10 is equal to the distance between adjacent metal conductors 32 on the insulating profile 38.

[0051] like Figure 1-2 As shown, the four wires of the launch control circuit are connected to the four terminals 21 on one side of the insulating housing 10, and the four-core igniter of the gas generator is connected to the four terminals 21 on the other side of the insulating housing 10.

[0052] When the launch tube is in storage and transportation operation, the ignition actuator 30 is not working. The conical surfaces 24 of the eight trigger sleeves 20 are in contact with the corresponding inclined surfaces 31 of the insulating irregular body 38 of the ignition actuator 30 under the action of the compression spring 28. The wiring terminals 21 on both sides are in an insulated state. Even if a misoperation occurs during equipment maintenance and protection, the launch control circuit will not be connected, thus playing a safety and insurance role.

[0053] When the launch tube of the aircraft is in the launch working state, the ignition working cylinder 30 is activated first, the piston rod extends, and the inclined surface 31 of the insulating profile 38 pushes the corresponding conical surface 24 of the trigger sleeves 20 on both sides, causing the trigger sleeves 20 to slide back. As the piston rod extends into place, the flat end face 25 of the trigger sleeve 20 is in contact with the end face of the fully threaded cylindrical metal conductor 32 on the insulating profile 38 under the action of the compression spring 28. The launch control circuit is connected to the 4-core igniter of the gas generator, realizing the release of the safety device.

[0054] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0055] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A safety and release assembly for pyrotechnic catapult launches of aircraft, characterized in that, include: Insulating housing (10), trigger sleeve (20) and fire working cylinder (30); The fire-working cylinder (30) is slidably installed axially inside the insulating housing (10), and the trigger sleeves (20) are slidably installed radially on both sides inside the insulating housing (10). The trigger sleeves (20) on both sides abut against the periphery of the fire-working cylinder (30) under the action of elastic force. The fire-working cylinder (30) includes: a metal conductor (32) and an insulating profile (38), on which the metal conductor (32) is installed; By axially moving the firing cylinder (30), when the trigger sleeve (20) abuts against the insulating profile (38), it is in a non-conductive state; when the trigger sleeve (20) abuts against the metal conductor (32), it is in a conductive state. The insulating housing (10) is provided with an elongated hole (12) along the axial direction. One end of the elongated hole (12) is connected to a square hole (11). The periphery of the insulating housing (10) is provided with a trigger sleeve hole (13) that communicates with the elongated hole (12) in the radial direction. The insulating irregular body (38) is composed of a plurality of radially protruding protrusions on the column, the side of the protrusion is set as a flat straight surface (34), and the straight surface (34) and the side of the column are transitioned by a smooth inclined surface (31). The protrusion is provided with a through hole in the radial direction to connect the two straight surfaces (34), and the metal conductor (32) is installed in the through hole and extends to the straight surfaces (34) on both sides at both ends; The trigger sleeve (20) includes: a terminal (21), a cover plate (22), a cylindrical head (23), a rod (27), a compression spring (28), and a shoulder (29); One end of the rod (27) is connected to the terminal (21), and the other end is connected to the cylindrical head (23) through the first threaded hole (26). A shoulder (29) is provided between the rod (27) and the terminal (21). The cover plate (22) is sleeved on the rod (27) and located between the shoulder (29) and the cylindrical head (23). The compression spring (28) is looped on the rod (27). One end of the compression spring (28) abuts against the cylindrical head (23), and the other end abuts against the cover plate (22). The shoulder (29) allows the cover plate (22) to limit the movement axially.

2. The aircraft pyrotechnic ejection safety and release assembly according to claim 1, characterized in that: One end of the insulating irregular body (38) is set as a cuboid (35), and the other end is threaded to one side of the metal cylindrical section (33) through the second threaded hole (36). A flange (37) is provided on the other side of the metal cylindrical section (33). The insulating irregular body (38) and the metal cylindrical section (33) are axially slidably installed in the elongated hole (12), the cuboid (35) is slidably installed in the square hole (11), and the fire working cylinder (30) is installed on the insulating shell (10) through the flange (37).

3. The aircraft pyrotechnic ejection safety and release assembly according to claim 1, characterized in that: The rod (27) and the cylindrical head (23) are slidably installed in the trigger sleeve hole (13). The cylindrical head (23) abuts against the periphery of the insulating irregular body (38) under the elastic force of the compression spring (28). The trigger sleeve (20) is installed on the insulating housing (10) through the cover plate (22).

4. The aircraft pyrotechnic ejection safety and release assembly according to claim 1, characterized in that: The cylindrical head (23) has a conical surface (24) at one end facing the insulating irregular body (38), and the top surface of the conical surface (24) that contacts the insulating irregular body (38) is a flat end face (25).

5. The aircraft pyrotechnic ejection safety and release assembly according to claim 1, characterized in that: Multiple trigger sleeve holes (13) are provided on both sides of the elongated hole (12). The trigger sleeve holes (13) on both sides are a pair and are completely identical. The trigger sleeve holes (13) on both sides are symmetrical about the center line. The trigger sleeves (20) on both sides are a pair and are completely identical, and the trigger sleeves (20) on both sides are symmetrical about the center line; The insulating irregular body (38) has multiple metal conductors (32), and the distance between adjacent metal conductors (32) is equal to the distance between adjacent trigger sleeve holes (13) on the same side.

6. The aircraft pyrotechnic ejection safety and release assembly according to claim 1, characterized in that: The insulating irregular body (38) has multiple inclined surfaces (31) and straight surfaces (34) on both sides of the column. The inclined surfaces (31) on both sides are paired and identical, and the inclined surfaces (31) on both sides are symmetrical about the center line. The straight surfaces (34) on both sides are paired and identical, and the straight surfaces (34) on both sides are symmetrical about the center line.

7. The aircraft pyrotechnic ejection safety and release assembly according to claim 1, characterized in that: The trigger sleeve (20) on one side of the insulating housing (10) is connected to the launch control circuit, and the trigger sleeve (20) on the other side is connected to the igniter of the gas generator.

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