Method of aircraft crew rescue and system to this end

FIELD: transport.

SUBSTANCE: invention relates to aircraft engineering, particularly, to catapult seat deceleration system. Ejection system comprises pneumatic drive composed by moving pneumatic cylinder-accumulator. Pneumatic cylinder comprises restrictor and safety valve. Method of ejection consists in sequential operation of, first, restrictor, then, safety valve to ensure compressed air design magnitude.

EFFECT: decreased weight and overall dimensions.

4 cl, 3 dwg

 

The invention relates to aircraft, in particular to a method of an emergency rescue of a crew member of the aircraft by the method of the bailout to the system for its implementation.

Currently known method of rescuing a crew member method of ejection, in which to catapult different weights of crew members with the design parameters of speed, acceleration and altitude toss use a pressure regulator with manual pre-setting, ensuring the firing mechanism of the pilot estimated driving force, which is used as the energy of compressed gas, for example air coming from the container (patent RF №2436711, priority 13.04.2010).

The method of salvation is implemented by a system comprising pneumatic actuator, consisting of a power unit (cylinder shut-starting head is filled with gas under pressure, for example, air), pressure regulator with manual transmission, mechanism of parachute activation and firing mechanism pilot (patent RF №2436711, priority 13.04.2010).

The main disadvantages of the known method and system for its implementation are as follows:

1. The possibility of error when the pre-setting pressure regulator with manual transmission.

2. Limited operating temperature range of application of this system of ejection, which is not �correspond to the real operating conditions of the aircraft. This is due to the influence of ambient temperature on the gas pressure in the cylinder upon actuation of the pneumatic actuator. For example, in the temperature range of ±60°C, the magnitude of the gas pressure will change by about 2 times that in a large part of the temperature range of operation of the aircraft does not provide the crew member ejection of calculated values of acceleration (overload), speed, altitude toss.

3. The large number of units connected by piping with valves increases the size and weight of the actuator.

To avoid these drawbacks we propose a method of an emergency rescue of a crew member of the aircraft, which consists in the ejection energy of a compressed gas, for example air coming from the tank, and the calculated value of the energy of compressed gas is provided automatically (unlike the manual settings in the prototype) by sequential operation of the first throttle, the area of flow section which is automatically incremented in the process of a pneumatic cylinder and then bleed the pressure relief valve dumping the excess pressure of the compressed gas to the calculated value that ensures the ejection of calculated values of acceleration, velocity, the height of the toss different weights of crew members in a wide range of�not operating temperatures.

The claimed method of salvation is realized with ejection seats, the pneumatic actuator is shown in figures 1, 2, 3.

Fig.1 is a schematic diagram of a pneumatic actuator.

Fig.2 is a section a-A.

Fig.3 is a section B-B.

The inventive actuator is made in the form of a device that combines the functions of a telescopic firing mechanism and the power supply unit. The actuator further comprises a safety valve limiting the pressure of air at an elevated temperature to the calculated value by venting it into the atmosphere.

Pneumatic actuator pneumatic cylinder contains-battery 1 pre-filled with a gas such as air, under pressure, with a cover 11, a bottom 12, a lock and release the head 2 with manual transmission 9, 3 movable and 6 fixed by pneumatic cylinders, flow tube 4, one end of which is connected to lock and release the head 2, the other with the working cavity of the pneumatic actuator, and a profiled needle 5, forming in the process the throttle "In" variable cross-sectional area that functions as an automatic pressure regulator, safety valve 10 connected to the working cavity "D", formed by the bottoms of the cylinder-the battery 1 and the fixed cylinder 6.

Operation of the inventive system is as about�time.

Having made the decision to eject, a member of the crew handle the ejector 9 actuates a lock and release the head 2, and the air from the internal cavity of the pneumatic cylinder of the battery 1 through the head 2 and the throttle "In" is fed into the working cavity "D" by moving pneumatic cylinder-accumulator pneumatic cylinder 1 and 3.

Wherein the side wall of the movable cylinders unloaded due to the influence of air pressure on the two sides, which reduces the deformation of the movable cylinders diameter when moving and reduces their margin of strength and mass.

Pneumatic cylinder-accumulator pneumatic cylinder 1 and 3, starting the movement, cut off the 8 pin, providing a stable source location of the cylinders, for example, during transportation, and then "shoot" up to the stop surfaces "M" in the surface "H".

Is the ejection of a crew member.

If the ejection occurs at an ambient temperature at which the air pressure in the working cavity "D" is above the value that ensures the design parameters of the ejection of a crew member is actuated relief valve 10, which limits the air pressure in the working cavity "d" of by venting it to the atmosphere to the calculated value, then the valve closes, keeping the pressure in the pneumatic actuator� air ensuring the ejection of a crew member with the estimated parameters.

Thus:

1. In the inventive actuator system does not contain a separate power supply unit (gas cylinder, air-filled with a lock and release the head), a separate pressure regulator and a separate firing mechanism of a crew member. It is made of a single device and does not contain external connecting pipelines with fittings. The function of the power supply unit is performed by the pneumatic cylinder is the battery, which also performs the function of a rolling pneumatic cylinder firing mechanism together with other cylinders.

All this, in comparison with the prototype, reduces the size and weight of the actuator.

2. In the inventive system in pneumatic actuator air pressure when charging is chosen so that it provided a bailout with different design parameters on the mass of the crew while the maximum negative temperature in the range of operating temperatures.

In this case, the ejection of calculated values with different weights of crew members in the rest of the operating temperature range will be ensured by grazing increased more than the calculated value of air pressure in the atmosphere of a safety valve, i.e., the ejection of calculated values will be about�to especializa only at a design pressure in a wide range of operating temperatures.

It expands operating temperature range of the actuator in comparison with the prototype and meet the real operating conditions of the aircraft.

3. In the inventive system in pneumatic actuator consistent application of the first throttle "B", the area of flow section which is automatically incremented in operation, pneumatic actuator, avoiding the creation of large "peak" of the overloads for the ejection of a crew member, and then the safety valve, bleed increased over the calculated values of the air pressure in the atmosphere, automatically provides the estimated ejection mode with different weights of crew members in a wide range of operating temperatures corresponding to the real operating conditions of the aircraft that, in contrast to the prior art, eliminates the need for manual pressure regulator and, thus, eliminates the possibility of errors when setting.

4. In the inventive system upon actuation of the pneumatic actuator filled with air only two pneumatic cylinders, the third pneumatic cylinder-accumulator is filled before the flight.

Reducing the number of cylinders filled with air, when activated, reduces the required amount of air and the response time of actuator that provides a favorable catapul�aims at low altitudes.

1. Method emergency rescue of a crew member of the aircraft, which consists in the ejection energy of a compressed gas, such as air, characterized in that the calculated value of the energy of compressed gas provide automatically by the consistent work of the first throttle, the area of flow section which is automatically incremented in the process, actuator, and then the safety valve.

2. Emergency rescue crew member method of ejection, containing the actuator, wherein the actuator is made in the form of a device comprising a movable pneumatic cylinder-accumulator filled with compressed gas, such as air under pressure, the movable and stationary cylinders, in the initial position fixed together.

3. A system according to claim 2, characterized in that the pneumatic cylinder-accumulator contains a lock and release the head and also the top and bottom, which are mounted on the consumable tube, one end of which is connected to lock and release the head, the other with the working cavity of the pneumatic actuator.

4. A system according to claim 2, characterized in that a stationary pneumatic cylinder includes a bottom on which there are profiled needle is inserted inside the feed tube, thereby forming during operation of the variable throttle cross-sectional area, and preservatives, free of medicines�valve, associated with the working cavity of the pneumatic actuator formed by the bottoms of the cylinder-accumulator and a stationary cylinder.



 

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