Hatch cover catapult based on cover throwing system

Abstract

The invention provides a hatch cover catapult based on a cover throwing system, the hatch cover catapult comprises a hatch cover catapult body, the hatch cover catapult body comprises a cylinder body, a piston, a nut, a bushing, an insensitive electric igniter and an electric connector, the piston is inserted into the cylinder body, one end of the cylinder body is provided with a pin, the outer side of the pin is provided with a plug in an inserted mode, and the plug is connected with the cylinder body. The plug is used for sealing one end of the interior of the cylinder body, the other end of the cylinder body is sleeved with a nut, silicone rubber is poured into the inner wall of the nut, and an insensitive electric igniter is further inserted into the nut. The hatch cover catapult based on the cover throwing system is simple in structural design, convenient to manufacture, low in cost and high in reliability. The cabin cover catapult is short in acting time, large in acting pressure and high in separation speed. And the device has the characteristics of light weight, reliability, high safety and good economical efficiency, a mechanical interface is simple, the overall optimization design of a missile-borne system is facilitated, and a reference can be provided for the design of a projectile cover system under similar use conditions.

Description

Technical Field

[0001] The invention relates to the technical field of shield ejection of missile-mounted weapon systems, and in particular to a hatch ejector based on a shield ejection system. Background Art

[0002] In the shield-dispensing system, if the missile's flight speed is lower than a certain value, the heat generated is not large and can be easily dissipated. When the speed exceeds this fixed value, the large amount of aerodynamic heat generated cannot be dissipated in time, causing the temperature of the hood, wave-transmitting window, optical window and fuselage surface to rise sharply, resulting in the weakening of the hood, wave-transmitting window, optical window and fuselage material structure strength and rigidity, and reducing the wave or light transmission performance of the wave-transmitting window and optical window, affecting the main detection performance of the missile. In order to overcome the aerodynamic heat problem of the missile during flight, the shield-dispensing method is mainly adopted. A protective shield that can be discarded as a whole can be designed to protect the precise and fragile radar hood or other highly sensitive detection units. This protective shield can be installed on the missile to improve the missile's aerodynamic shape and protect the missile's own radar hood or precision detection unit.

[0003] However, the shield ejection system in the prior art uses a detonating cord buried in the hood, or is fixed to the missile shell through multiple safety pins or other quick-detachment mechanisms, and uses a quick-start high-pressure gas cylinder to generate high-pressure gas applied to the bottom of the protective shield. The safety pins are quickly cut off to quickly separate the protective shield from the missile body under supersonic conditions. These methods make the missile hood structure design complicated and cumbersome, and have low applicability and reliability. Summary of the invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a hatch cover ejector based on a hatch ejection system to solve the problems raised in the above-mentioned background technology. The hatch cover ejector provided by the present invention has a simple structure, a fast separation speed, high reliability, low cost and good applicability.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a hatch cover ejector based on a hatch cover ejection system, including a hatch cover ejector body, the hatch cover ejector body including a cylinder, a piston, a nut, a bushing, an insensitive electric igniter and an electric connector, the piston is inserted into the interior of the cylinder, and a pin is installed at one end of the cylinder, a plug is inserted into the outer side of the pin, and the plug is used to seal the inner end of the cylinder, the other end of the cylinder is sleeved with a nut, the inner wall of the nut is poured with silicone rubber, and an insensitive electric igniter is also inserted into the interior of the nut, one end of the piston is connected to the end of the insensitive electric igniter, and an electric connector is installed at the rear end of the insensitive electric igniter.

[0006] Furthermore, one end of the cylinder body is processed with an external thread structure, and the other end of the cylinder body is opened as a through hole, and two holes are opened in the radial direction of the through hole at the end of the cylinder body. The pin passes through the two holes opened at the end of the cylinder body for locking, and the nut is locked after matching the external thread structure at one end of the cylinder body.

[0007] Furthermore, the pin is embedded in the cylinder body, and the pin passes through two holes opened at one end of the cylinder body and then is riveted, and the riveting point does not protrude from the cylindrical surface.

[0008] Furthermore, buffer pads are attached to one end of both sides of the piston, the end of the piston is in contact with the plug, and the piston moves translationally along the inside of the cylinder.

[0009] Furthermore, an annular groove is formed on the side of the piston, a sealing ring is sleeved inside the groove, the piston is fitted with the inner wall of the cylinder through the sealing ring, and the sealing ring is coated with grease before being installed into the cylinder.

[0010] Furthermore, the insensitive electric igniter and the electric connector are connected via a cable with a wave-proof sleeve, and the electric connector can be connected to an external controller for receiving an ignition signal.

[0011] Furthermore, the rated ignition parameter of the inductive electric igniter is 5A DC.

[0012] Furthermore, a sleeve and a gasket are provided on the side of one end of the insensitive electric igniter, the gasket is installed on the side of the sleeve, and the sleeve is pressed against the end of the cylinder body.

[0013] Furthermore, one end between the insensitive electric igniter and the nut is sealed by injected silicone rubber, and one end of the insensitive electric igniter is successively equipped with a bushing and a gasket for sealing.

[0014] Furthermore, after the nut and the cylinder body are threadedly connected, GY-340 anaerobic adhesive is coated on the mating threads, and the separation speed of the hatch cover ejector body is greater than 20m / s.

[0015] Beneficial effects of the present invention:

[0016] 1. The hatch cover ejector based on the ejection cover system has a simple structure design, convenient manufacturing, low cost and high reliability.

[0017] 2. The hatch cover ejector based on the ejection system has a short action time (no more than 10ms from system power supply to piston movement into place), a high action pressure (when the piston moves into place, the pressure of the gas in the cylinder on the piston is not less than 2000N), and a fast separation speed (the separation speed is not less than 20m / s when the hatch cover ejector is in action).

[0018] 3. The canopy ejector based on the canopy ejection system is lightweight, reliable, safe and economical. It has a simple mechanical interface, which is conducive to the overall optimization design of the canopy ejection system and can provide a reference for the design of canopy ejection systems under similar operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A cross-sectional view of a hatch cover ejector based on a cover ejection system according to the present invention;

[0020] In the figure: 1. cylinder body; 2. piston; 3. nut; 4. plug; 5. sealing ring; 6. buffer pad; 7. bushing; 8. gasket; 9. pin; 10. insensitive electric igniter; 11. silicone rubber; 12. electrical connector. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] See also Figure 1 The present invention provides the following technical solutions: A canopy ejector based on a canopy ejection system comprises: a cylinder 1, a piston 2, a nut 3, a plug 4, a sealing ring 5, a cushion 6, a bushing 7, a gasket 8, a pin 9, an insensitive electric igniter 10, a silicone rubber 11 and an electrical connector 12. The piston is inserted into the interior of the cylinder, and a pin is installed at one end of the cylinder, and a plug is inserted on the outside of the pin, and the plug is used to seal the inner end of the cylinder. A nut is sleeved on the other end of the cylinder, and silicone rubber is poured on the inner wall of the nut, and an insensitive electric igniter is also inserted inside the nut. One end of the piston is connected to the end of the insensitive electric igniter, and an electrical connector is installed at the rear end of the insensitive electric igniter. One end of the cylinder body is processed with an external thread structure, and the other end of the cylinder body is opened as a through hole, and two holes are opened in the radial direction of the through hole at the end of the cylinder body. The pin passes through the two holes opened at the end of the cylinder body for locking, and the nut is locked after matching the external thread structure at one end of the cylinder body.

[0023] In this embodiment, the material of the cylinder body 1 is 2Cr13, with a tensile strength of 835MPa and a yield strength of 635MPa. The processed shape is cylindrical, 49mm long, one end is processed into a thread, 11mm long, 21mm outer diameter, external thread M20*1.5, and inner diameter 13mm; the other end is processed into a through hole, 36mm long, 12mm outer diameter, 6mm inner diameter, and two φ1.5 small holes are opened in the radial direction.

[0024] In this embodiment, the piston 2 is made of 2Cr13, 32mm long, with an outer diameter of φ13f8mm at one end, 6mm long, and an end face fillet of R0.5; the other end has an outer diameter of φ6cd9mm, 26mm long, and an end face fillet of R1.

[0025] The nut 3 is made of 1Cr18Ni9Ti, 40mm long, φ26mm outer diameter, 18mm long at one end, with stepped internal processing, and the dimensions are M22×1.5-6H and φ15H12mm, respectively. The other end is 22mm long and has an inner diameter of φ12.1H12mm. The plug 4 is made of 1Cr18Ni9Ti, 11mm long, φ9mm outer diameter at one end, internal thread M4*5, φ6mm outer diameter at the other end, and a φ1.5H10 hole is processed 2mm from the end face.

[0026] In this embodiment, the inner diameter of the sealing ring 5 is φ8.5±0.14 mm, the cross section is φ1.8±0.08 mm, and the compression amount is 15.7-25.5%.

[0027] In this embodiment, the material of the buffer pad 6 is polytetrafluoroethylene, with an outer diameter of φ12mm, an inner diameter of φ6mm, and a height of 2mm.

[0028] In this embodiment, the bushing 7 is made of 1Cr18Ni9Ti, with an outer diameter of φ18mm, a height of 5mm, an inner diameter of φ14.5mm at one end and φ12.1mm at the other end.

[0029] In this embodiment, the gasket 8 is made of T2Y, 4 mm long, with an outer diameter of φ14.5d12 mm and an inner diameter of φ12H12 mm.

[0030] In this embodiment, the pin 9 is made of 2Cr13, has a length of 11.6 mm, and has a processing size of φ1.5c10 at both ends and a chamfer of 0.3×45°.

[0031] In this embodiment, the inductive electric igniter 10 has a rated ignition parameter of DC 5A, and a pressure of 23MPa to 54MPa is established in the chamber.

[0032] In this embodiment, the insensitive electric igniter 10 and the electric connector 12 are connected via a cable with a wave-proof sleeve, and the electric connector 12 can be connected to an external controller for receiving an ignition signal.

[0033] This embodiment also provides an assembly process of the canopy ejector of the ejection system, and the specific process is as follows:

[0034] Step 1: Use all-purpose glue DG-3S to glue the cushion 6 and the piston 2 together, apply a proper amount of lubricating grease SH0459 on the sealing ring 5, and then install it into the corresponding part of the piston 2;

[0035] Step 2: Install the piston into the cylinder 1, and move the piston 2 back and forth in the cylinder several times. The piston should move flexibly, and ensure that the piston rod end is 13mm±0.5mm higher than the end surface of the cylinder after the piston moves into place;

[0036] Step 3: Install the plug 4 into the corresponding hole of the cylinder body, and gently push the piston until the cylinder body is aligned with the hole of the plug for installing the pin 9. Install the pin 9 into the corresponding hole, and spot rivet the ф1.5 hole of the cylinder body. After spot riveting, the pin is firmly fixed, and the rivet point must not protrude from the cylindrical surface;

[0037] Step 4: Install the washer 8 and bushing 7 on the insensitive electric igniter 10, insert the nut 3 from the other end of the cable, apply GY-340 anaerobic glue on the thread between the nut 3 and the cylinder body 1, screw the nut on the cylinder body, and tighten it with a torque of 80N·m.

[0038] Step 5: Fill the connection between the inductive electric igniter 10 and the electric connector 12 with 704 silicone rubber 11.

[0039] The hatch cover ejector provided after the above assembly has a short action time, which is no more than 10ms from system power supply to piston movement into place; and a large action pressure. When the piston moves into place, the pressure of the gas in the cylinder body on the piston is no less than 2000N; and a fast separation speed. When the hatch cover ejector is in action, the separation speed is no less than 20m / s.

[0040] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A canopy ejector based on a canopy ejection system, comprising a canopy ejector body, characterized in that: The hatch cover ejector body comprises a cylinder (1), a piston (2), a nut (3), a bushing (7), an insensitive electric igniter (10) and an electric connector (12); the piston (2) is inserted into the cylinder (1), and a pin (9) is installed at one end of the cylinder (1); a plug (4) is inserted into the outer side of the pin (9); the plug (4) is used to seal the inner end of the cylinder (1); a nut (3) is sleeved on the other end of the cylinder (1); silicone rubber (11) is poured on the inner wall of the nut (3), and an insensitive electric igniter (10) is also inserted into the nut (3); one end of the piston (2) is connected to the end of the insensitive electric igniter (10), and an electric connector (12) is installed at the rear end of the insensitive electric igniter (10).

2. A hatch cover ejector based on a cover ejection system according to claim 1, characterized in that: One end of the cylinder body (1) is processed with an external thread structure, and the other end of the cylinder body (1) is opened as a through hole, and two holes are opened in the radial direction of the through hole at the end of the cylinder body (1). The pin (9) passes through the two holes opened at the end of the cylinder body (1) for locking, and the nut (3) is locked after matching the external thread structure at one end of the cylinder body (1).

3. A hatch cover ejector based on a cover ejection system according to claim 2, characterized in that: The pin (9) is embedded in the cylinder body (1), and the pin (9) passes through two holes opened at one end of the cylinder body (1) and is then riveted, and the riveting point does not protrude from the cylindrical surface.

4. A hatch cover ejector based on a cover ejection system according to claim 1, characterized in that: Buffer pads (6) are attached to one end of both sides of the piston (2), the end of the piston (2) is in contact with the plug (4), and the piston (2) moves in translation along the inside of the cylinder body (1).

5. The hatch cover ejector based on the cover ejection system according to claim 1, characterized in that: The side of the piston (2) is also provided with an annular groove, and a sealing ring (5) is sleeved inside the groove. The piston (2) is fitted with the inner wall of the cylinder body (1) through the sealing ring (5), and the sealing ring (5) is coated with grease before being installed in the cylinder body (1).

6. A hatch cover ejector based on a cover ejection system according to claim 1, characterized in that: The insensitive electric igniter (10) and the electric connector (12) are connected via a cable with a wave-proof sleeve, and the electric connector (12) can be connected to an external controller for receiving an ignition signal.

7. A hatch cover ejector based on a cover ejection system according to claim 6, characterized in that: The rated ignition parameter of the inductive electric igniter (10) is 5A DC.

8. The hatch cover ejector based on the cover ejection system according to claim 1, characterized in that: A bushing (7) and a gasket (8) are sleeved on one side of the inductive electric igniter (10). The gasket (8) is installed on the side of the bushing (7), and the bushing (7) is pressed against the end of the cylinder body (1).

9. A hatch cover ejector based on a cover ejection system according to claim 8, characterized in that: One end between the inductive electric igniter (10) and the nut (3) is sealed by injected silicone rubber (11), and one end of the inductive electric igniter (10) is successively installed with a bushing (7) and a gasket (8) for sealing.

10. A hatch cover ejector based on a cover ejection system according to claim 9, characterized in that: After the nut (3) and the cylinder body (1) are connected by threads, GY-340 anaerobic adhesive is coated on the mating threads, and the separation speed of the hatch cover ejector body is greater than 20 m / s.

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