RU2694384C1 - Device for protection of aircraft on-board recorders against impact and thermal damages at aircraft crush and fire - Google Patents

Abstract

FIELD: aviation.

SUBSTANCE: invention relates to aircraft on-board accumulators. Protection device of aircraft airborne recorder comprises inner (2) and external (8) cavities. Inner cavity (2) serves to accommodate board recorder (1) in working position and comprises air cushions (5). On-board recorder (1) is held on elastic elements (7). Outer cavity (8) is made as vacuum and is intended to protect against thermal action on the recorder in case of fire. To protect the device against thermal radiation associated with fire, outer shell (9, 10) is made of heat-resistant material. Also external shell (9, 10) of external cavity is covered with a layer of light-reflecting material.

EFFECT: invention ensures safety of flight information.

1 cl, 1 dwg

Description

The invention relates to aeronautical engineering and is a means of protecting aircraft onboard accumulators (the so-called "black boxes") from shock and thermal effects in the event of a fall of the aircraft and a fire on its board.

The lack of proper protection often leads to a serious destruction of the recorders, making it very difficult, and in some cases completely eliminating the possibility of decoding the recording under shock and thermal effects in the event of a crash of the aircraft and a fire on its side.

Known devices and methods for protecting flight recorders from destruction and preserving the integrity of the information contained in them by their hulls before the aircraft crashes and the recorder is lowered by parachute with a working beacon according to patent RU 2113380 C1, 20.06.1998. Known also contained in the patent 2198116 of 03.11.2003, the Method of protection against destruction of the flight recorder when hitting the ground with a durable shell, inside of which the body of the recorder is hung on springs or durable elastic elements. The space between the recorder body and the outer protective shell is filled with low-freezing (antifreeze-like) liquid, which, expanding in the event of a fire on a ship, can push the black box out of the fire zone due to reactive forces when a heated fluid flows into the hole provided with a ruptured diaphragm.

It is also known “A device and method for preserving the integrity of aviation flight recorders”, which is described in the patent for invention No. 2616323. It also provides critical considerations regarding the disadvantages of the proposed inventions.

As a prototype, the protection method proposed in patent No. 2616323 as the most closely adjacent to the claimed patent can be adopted.

The proposed protective device consists of two cavities - internal and external. The recorder case is located in the inner cavity, suspended from the outer wall on the springs or any other elastic elements; In the same cavity is located (located) one or more automotive-type airbags, as shown in the drawing.

The external cavity is designed as a protection against temperature effects, for which air is pumped out of it and a vacuum is created, which plays the role of a thermal insulator. The outer shell of this cavity is made of high-strength material and is covered with a reflective layer in order to protect against thermal radiation.

Thus, the internal cavity with airbags located in it serves to protect against impact when the aircraft falls, and the external cavity isolates the recorder from temperature exposure, providing reliable protection against damage to the information contained in the recorder.

The drawing shows a schematic diagram of the device. The structure of the proposed protective device includes the following elements: 1 - flight recorder; 2 - the internal cavity formed by the upper 3 and lower 4 shells; 5 - pillow (pillows) located (located) in the internal cavity of the protective device; 6 - internal recorder plug-in connector; 7 - springs holding the recorder in the internal cavity; 8 - external cavity containing a vacuum formed by the upper 9 and lower 10 halves of the shell; 11 - external plug connector of the recorder; 12 - fastening elements of the internal cavity relative to the external cavity containing the vacuum.

The device works as follows. In the working position, the recording and operation of the systems, or the crew talks, is carried out via wiring, the internal and external plug connectors 6 and 11, and the flight recorder.

In an emergency, when an aircraft strikes the ground, an emergency airbag system is triggered and the released gas creates an overpressure of 1 MPa, which fills the entire internal cavity, protecting the recorder from damage due to an impact, and the airless screen of the external cavity prevents the recorder from thermal impact caused by fire on the aircraft, keeping the information available on the recorders of the “black boxes”.

The technical result is that the proposed method and device, ensuring the safety of existing flight information, helps to ensure the possibility of high-quality decoding, eliminating the complexity of this procedure, sometimes requiring several months.

Claims (1)

A protection device for an aviation flight recorder, referred to as a “black box”, containing a durable non-flammable shell, inside which the flight recorder is located and the cavity held inside by elastic elements along with automotive-type airbags, designed to protect the recorder from damage when the aircraft strikes the ground, which is different the fact that the device contains an additional external cavity, which is externally closed by a strong non-combustible shell, inside which a deep vacuum is created , designed to protect the device from thermal effects in the event of a fire in the aircraft, and the surface of the outer shell of the outer cavity is covered with reflective material that protects against thermal radiation.

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