DE640228C - Back pressure drive device with check inlet valve - Google Patents

Description

Back pressure drive device with check inlet valve It is known that the propeller drive at very high speeds, especially in the stratospheric area, becomes uneconomical. The reaction effect is far more suitable: flowing Rocket engine exploiting gases.

"With pure rocket propulsion, the fuel and the fuel are used for combustion necessary auxiliary material (usually oxygen) carried in the vehicle itself the similar device in which fuels by means of that contained in the air Oxygen being burned, in contrast, offers considerable advantages. "Such back pressure devices .are known. Almost without exception, they have a combustion chamber as a common feature with a check valve. The combustion gases. flock doing work from a conical nozzle.

Essential. they are differentiated z. B. by the type of combustion air supply or the ¢ actuation of the chamber shut-off valve.

It is suggested to use the back pressure as compression pressure, or to force a mixture into the combustion chamber.

The opening of the chamber shut-off valve is either inevitable by means of motor-driven control elements or by the mixture pressure.

This results in clearly distinguishable work processes. Further , back pressure devices have been proposed. those as combustion chambers . simply two-stroke engines with free-flying pistons are connected upstream.

With the arrangements proposed so far, one was lawful Work step and thus a high level of alignment with the theoretical heating process is not achievable ..

The subject of the invention is an intermittently operating back pressure device.

From the known back pressure devices. differs Subject of the invention presented in that a long-shafted Kammerabsgerrventil carries a piston that can be moved in a guide cylinder: the piston opens a fuel valve located on the cylinder as it moves forward, so that the fuel be fed into the combustion chamber via bores in the piston and valve stem can.

The ignition is initiated in a known manner by a device which is actuated by the chamber check valve and works so that the explosion in the chamber, as soon as the fuel flows in, an ignitable Mixture is formed in the chamber. .

The piston is in the direction of the opening movement of the chamber shut-off valve by a pressure medium, in the direction of the closing movement (explosion pressure direction) by resilient a spring that can be changed in its compressive action .-. The suspension is adjustable so that an opening of the chamber shut-off valve by the wind (plus valve inertia) - does not take place even at the highest possible driving wind pressure.

The opening of the inlet valve will no longer take place when pressure medium plus driving wind pressure overcoming the counteraction (e.g. a certain internal chamber pressure).

Recoil apparatus in which, as in the present invention, the chamber shut-off valve is closed by the explosion pressure, the better the work, the lower the Closing resistance is. Ideally with a valve that is weightless in the extreme case.

Due to the arrangement described, a Significant progress has been made that the Kammerabsperrventi.l in every operating position works as an almost stress-free organ and a separate fuel supply is operated in conjunction with the air inlet valve.

The pressure effect behind the piston in the direction of the opening movement can be influenced in such a way that, if the intake valve is heavily loaded, it will through the driving wind pressure is reduced or, conversely, increased.

It is another significant advance of the present invention, that hereby a working method that adapts to changing driving speeds of the recoil apparatus is guaranteed, especially if, as provided, the Influencing the pressure effect by a control device actuated by the driving wind he follows.

As is known, the recoil device consists of a combustion chamber i with shut-off valve a.

The shut-off valve has a long shaft with sealing rings _ Piston 3 connected, in one with nipples. 5 provided cylinder q. guided will.

The piston shaft is pierced in the longitudinal axis and the piston with it a cam-like recess, in the holes radially to the piston means except for the Shaft hole are drilled, provided.

The control piston is activated by pressure (e.g. compressed air from container 6) driven forward, at the same time the chamber shut-off valve opened and through the piston groove cam a non-return valve 8 that shuts off the fuel supply is raised.

The fuel can now flow into the combustion chamber.

The fuel can be conveyed under pressure or by Mixing finitely air takes place, as well as the atomization of the fuel by means of Nozzles attached at any point along the fuel path 9.

The piston chamber valve movement causes the Ignition device i o short-circuited.

The explosion in the chamber takes place as well as the ignitable mixture has formed. The non-return valve is closed by the explosion.

The outflow of the combustion gases takes place from, a conical Supersonic nozzle. When the combustion gases are ejected from the chamber the combustion air inlet and fuel path open again.

A pressure effect acts on the control piston against the pressure medium spring 13 which can be changed by a screw ring 1z. This makes it possible to adjust the control pressure set so that at the end of the piston travel pressure medium and counter-suspension are balance.

The chamber valve is thus at the slightest overpressure in the chamber happened.

Claims (1)

PATENT CLAIMS: i. Back pressure drive device with check inlet valve for the combustion chamber, which is opened by the driving wind, characterized in - that the shaft of the inlet valve has a piston displaceable in a guide cylinder. (3) carries a fuel inlet valve located on the cylinder during the valve opening movement (8) opens and the fuel flowing in through valve (8) via bores in the piston and in the valve stem into the combustion chamber. z. Back pressure drive device according to claim i, characterized in that the inlet valve by a Piston acting in the sense of the valve closing movement, adjustable in tension Spring is loaded.