DE1451677A1 - Propellant gas generators, in particular with free-flight pistons - Google Patents

Description

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SOCIETS D'ETÜDES 6T DB PARTICIPATIONS EAU, GAZ, ELECTRI-CITEf ENERGIE S.A.

Propellant gas generators, especially those with pre-flight pistons Priority: France, February 7, 1964

The invention relates to propellant gas generators, i.e. machines with a preferably according to the Two-stroke dieeel process engine cylinder un: < at least one compression cylinder in which air is compressed which at least for the most part the Ilotorcyi binder for purging and feeding the same is supplied, with the incompletely expanded combustion gases and the scavenging air forms a hot compressed gas mixture when it emerges from the engine cylinder, which a working machine

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machine, e.g. a turbine, to operate the same will.

The invention relates in particular, although not exclusively, to propellant gas generators of this type the free-flight piston propellant gas generators, and of these in turn the propellant gases in particular: euger, with which the compression and delivery stroke in the compressor cylinder or the compressor cylinders coincide with the compression stroke in the hot cylinder.

In such propellant gas generators is the

Engine cylinders are generally arranged in a space called a "housing" in which the compressor cylinder or cylinders convey the compressed air, which serves as an air tank for feeding and flushing the engine cylinder, which latter has in its Va nd inlet slots which are exposed by the engine piston at the moment in velchem it approaches its outer dead center, whereby the interior of the housing uit deti the interior of the motor cylinder is connected so that the air contained in the housing enters the engine cylinder

It has been shown that it often happens with the known propellant gas generators that the Opening the inlet slots of the engine cylinder allows a small amount of the combusted gases from the engine cylinder to pass through

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these slots exits and enters the housing, wherein a certain amount of oil will also genocimen. This oil is deposited on the wall of the housing and causes the same to become dirty.

The invention aims in particular to avoid this disadvantage.

For this purpose, the inlet slits are according to the invention laid in a chamber, which is located inside the housing, and the wall of which the slots in in a radial direction at a certain distance from them, this chamber being with the rest of the housing

one

through opening at least / to the side of the slots communicates.

The invention is hereinafter referred to explained on the drawing by way of example.

1 shows a schematic axial section according to a first embodiment of FIG Invention trained propellant gas generator with counter-rotating Preiflug piston.

Pi;;. 2 and 3 incline in an axial section or in a section along the line III-III of Pig. 2 one propellant gas generator designed according to a second embodiment of the invention with counter-rotating free-flight pistons,

The propellant gas dispenser has, in a manner known per se, an engine cylinder 1 in its wall

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Inlet slots 2 and outlet slots 3 are provided. In the engine cylinder 1 work two counter-rotating engine pistons 4, each of which belongs to a movable arrangement, which is formed by one of these engine pistons and a compressor piston 5 working in a compressor cylinder 6 » The engine pistons 4, when they are at their outer dead center, place the inlet slots 2 and the outlet slots 3 free, as shown in the figures. The two movable assemblies 4-5 are with each other connected in a manner known per se by a synchronizing mechanism, not shown.

The engine part of the propellant gas generator formed by the cylinder 1 and the engine pistons 4 works according to the two-stroke diesel process. The fuel will then injected in a manner known per se through one or more injection nozzles (not shown) at the moment in which the engine pistons 4 are at their outer dead center or in the vicinity thereof.

Each compressor piston divides its cylinder 6 into two chambers, of which the one on the inside of each piston 5 lying chamber 6a, the actual Compressor cylinder forms and is provided for this purpose with suction valves 7 and pressure valves 8, while the on the outside of each piston 5 lying chamber 6Jb

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a pneumatic accumulator for the return energy forms, which in its air cushion during the ncich outward stroke of the movable assemblies takes up most of that in the rotor cylinder 1 during the working stroke (outwardly directed stroke) the notor piston stores developed energy in order to subsequently use it to be returned to the movable assemblies during the compression stroke (inward stroke).

The compressor pistons 5 suck air into the chambers 6a_ during their outward stroke the suction valves 7 and compress this air with their inwardly directed stroke in these chambers, to them finally via the valves 8 into a space called "Gehatase" 9 to demand, which surrounds the Hotorylinder 1 and the Air reservoir for S plan g and supply of the cylinder 1 forms. This purge and feed air can enter the cylinder as soon as the inlet slots 2 are exposed the engine piston 4 located on the side of these slots begins.

According to the invention, the inlet slots 2 do not open directly into the interior of the housing 9> but are located in a chamber which is inside of the housing 9 forms a collecting area which is separated from the housing, although it is constantly in contact with it

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In the embodiment shown in Fig. ^{1 /}

Rungsforta this Kararaer is formed by .eine: cylindrical partition wall 10, which is arranged completely inside the G-ehaus.es und.sich in front of the slots 2 parallel to the wall of the cylinder ι at a certain distance from this Wall extends. The thus created partition wall 10 and · the Λ / and of the cylinder 1 is closed at one end by an annular bottom 1.1 and is connected to the interior of the housing 9 at its other end. If, therefore, when the cylinder 1 is flushed, a small amount of foL-laden gases is expelled into the chamber which _provides the slots; these gases cannot spread within the housing, and the 61 contained in these gases cannot cause pollution of the housing. '"^;: -

The purge air flowing out of the housing 9

passes through the ring roughness through the walls 10 and 11 and reaches the seat braids 2 through which the air flows, so that the combustion gases located within the cylinder 1 can mix, so that a mixture of combustion gases and purging air from the cylinder 1 exits through the outlet 5, which are surrounded by an off la β s amme AuIn Ir ¹ 2, v / hich nit of the initial

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letting line 13 of the propellant gas generator is in connection, which is connected to the inlet of a turbine, for example.

Gemäß8 another ^A usführungsform the invention, the inlet slots 2 surrounding chamber a radiator or its upstream of such a radiator, which cools the feed and purge air prior to its entry into the cylinder. 1 This latter Pail is shown in Mg. 2, in which the ¹ 5 is formed, the intake slots surrounding chamber by two radial axis perpendicular to the axis of the engine cylinder walls H, whose edges are joined by a third wall 16, the generating lines of the dumbbell lines Cylinder 1 are parallel, and which covers the slots 2 in the radial direction at a certain distance from them. The chamber separated by these partition walls from the interior of the housing is in communication with the housing via a line 17, into which a cooler 18 is connected, through which the scavenging and feed air of the engine cylinder flows, so the inlet slots 2 of the cylinder are connected to the corresponding piston 4 are exposed. The path of this air is indicated in Fig. 2 by arrows. The cooler 18 can in turn be cooled by a flow of water which may or may not belong to the cooling system of the propellant gas generator, the cooler

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but can also be done by a fan, for example
generated airflow ".

In this embodiment, too prevents the inside of the housing 9 from being contaminated by the oil flowing out of the engine cylinder 1 with the combustion gases could escape when the inlet slots 2 are open.

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Claims (3)

U51677 claims 1.) Propellant gas dispenser, in particular free aviation piston propellants, in which the engine cylinder lies within a housing for storing the air for feeding and flushing the motor cylinder, thereby characterized in that the inlet openings (2) of the engine cylinder (1) lie in a chamber which is inside of the housing (9) is located, and the wall of which the? openings surrounds in the radial direction at a certain distance from them. 2.) propellant gas aspirator according to claim 1, characterized characterized in that the chamber is formed by a cylindrical wall (10), the axis of which is to the axis of the motor cylinder (1) is parallel, and whose inner diameter is larger than the outer diameter of this cylinder, as well as through a radial wall (11) is formed which a -ünde that lying between the outer surface of the motor cylinder (1) and the inner surface of this cylindrical wall (10) Annular space closes, this annulus freely with the Communicates inside the housing (9) at the other end of the cylindrical wall. 3.) Propellant gas generator according to claim 1, characterized in that the inlet openings (2) 9098 13/07 3 9 BAD ORIGINAL U51677 - ίο -. containing chamber contains an air cooler (18), or that such a cooler is connected upstream of the chamber, this cooler cools the feed and purge air before it enters the hot water cylinder « 13/0739 COPY BAD ORIGINAL