Gas generator

FIELD: machine building.

SUBSTANCE: gas generator consists of inlet and outlet valves with rods located in its combustion chamber, of communicating with chamber cylinder with spring-loaded stepped slide valve positioned between two arresters of its run and of mechanisms of delay. A channel of fuel discharge with an on-off valve installed in it is connected to a fuel supply main. The mechanisms of delay correspond to spring elements arranged on rods of the inlet and outlet valves and resting on the case of the chamber; the spring elements change character of power to a reverse one in the process of deformation. A fuel tank with a filter, and a fuel pump with an electric engine are mounted on the gas generator. The fuel system is equipped with a conic nozzle and controlled system of air ejector.

EFFECT: usage of generator as independent unit.

1 dwg

 

The present invention relates to mechanical engineering, in particular to engine, and can be used wherever you need a source of hot gas with high energy parameters, such as gas turbine or a ramjet engines.

A device (similar) with a constant volume combustion [1], which contains the combustion chamber of constant volume, a spring-loaded inlet valve, discharge nozzle in the form of a long pipe and a turbine.

However, despite the simplicity, the design has a low parameters of combustion products, the lack of completeness of combustion of the working mixture, increased the toxicity of exhaust gases and increased fuel consumption.

Also known by the system (prototype) regulation of the combustion chamber of a gas turbine engine with a constant volume combustion [2], containing situated in the combustion chamber intake and exhaust valves with rods connected to the main fuel supply channel reset it with the installed two-position valve which is connected with the Cam cylinder located therein a spring-loaded stepped spool and mechanisms delay valves, made in the form installed on the valve stem and supported on the camera housing, the spring elements, changes in the deformation process, the sign of his power on the reverse, and STU is entity the valve is installed on the exhaust valve stem between the two stops its progress.

However, this system, despite all its advantages, has significant drawbacks: it is an appendage of the gas turbine engine and can not be used as an independent unit under those conditions, when you need a source of high pressure hot air, for example when clearing icy runway or as a ramjet engine.

The task of the present invention is to remedy these disadvantages, namely the creation of an independent unit, capable of working in conjunction with the turbine, and without it, as well as giving a gas generator for the possibility of multiple changes in the power ring of the turbine by changing the number set her on the generators or disable them.

This object is achieved in that the gas generator containing located in the combustion chamber intake and exhaust valves with rods connected to the main fuel supply channel reset it with the installed two-position valve which is connected with the Cam cylinder located therein a spring-loaded stepped valve, placed between two stops its progress, and mechanisms delays as mounted on the rods intake and exhaust valves based on the camera body spring e is the elements, changes in the deformation process, the sign of his power on the reverse, to give him the possibility of use as an independent unit, is installed in the fuel tank filter, fuel pump with an electric motor, the number of turns which change the speed of the fuel pump and, consequently, fuel consumption, fuel system fitted with a tapered nozzle mounted on the end of the fuel rail, and adjustable air ejector mixing of air with fuel by reciprocating movement of the conical nozzle of the fuel system relative to the mixing chamber of the ejector.

The drawing shows a structural diagram of a gas generator in the section.

The gas generator consists of a combustion chamber of constant volume 1 placed in her inlet 2 and outlet 3 valves with rods, spring-loaded manual valve 4 installed between the two limiters rate "a" and "B", with a possibility of free movement on the rod outlet 3 of the valve, the highway fuel 5 with channel 6 reset fuel, which is blocked off by the valve 7, the spring elements 8 and 9 installed on the valve stem 2 and 3 and supported on the housing 1, limiting movement of the spring elements 8 and 9 adjustable stops 10 and 11, the exhaust nozzle 12, the Ruzhin 13 of the spool 4, the fuel pump 14 with the motor, the fuel tank 15 and a filter 16, the nozzle of the fuel supply 17, the adjustable air ejector 18 with a check valve 19, the relay 20 of the spark plug 21.

The generator works in the following way:

when turning on the motor of the fuel pump 14 and he from the fuel tank 15 through the filter 16 delivers fuel to the intake valve 2, as the valve 2 is closed, the pressure in front of him is equal to the total pressure developed by the pump 14, under the action of this pressure and the pressure of the spring 13, the spring element 9 is bent, it goes "dead" point, changes the sign of its strength on the back and opens the inlet valve 2, the fuel enters the combustion chamber 1, at the end of the fuel nozzle fuel supply 17 it podsushivaet the air through the ejector 18, which mixes with the fuel, forms the fuel-air combustible mixture that fills the combustion chamber 1, as well as the fuel line passes close to the hot combustion chamber 1, the fuel is vaporized and the steam-air mixture flows into the combustion chamber 1, as the filling of the combustion chamber 1 inlet valve 2 as "POPs", the spring element 9 is bent, crossed the "dead" point, closes the valve 2, the rod closes the relay contacts 20 and power is supplied to the spark plug 21, is the ignition of the combustible mixture, press the s in the combustion chamber 1 increases and after reaching design pressure, when all the fuel is burned up, lifted a stepped spool 4 and, as the pressure begins to act on a large area, a stepped valve rises sharply, rests on stop "And" and lifts the exhaust valve 3, which, overcoming the resistance of the spring element 8, makes him change the sign of his power and hold the exhaust valve 3 in the open position, the combustion products with great speed, temperature and pressure will expire through the outlet nozzle 12, doing useful work, while the exhaust valve stem 3 pushes the rod-off valve 7, which closes the fuel supply line 5 and opens channel reset fuel 6, simultaneously with the expiration of gases from the nozzle 12 to the ambient air sucked into the internal cavity of the exhaust valve 3, cooling it, and, mixing with the combustion products increases their number; after the expiry of the products of combustion pressure in the combustion chamber 1 due to the inertia of the hot gases is reduced to negative and when the preset vacuum cumulative effect of the springs 13 of the spool 4 and the vacuum speed of the spool 4 is lowered through the limiter "B" causes the closing of the exhaust valve 3, while the on-off valve 7 closes the channel reset fuel and opens the line of its filing.

Cycle stand is areeda.

By adjusting the stops 10 and 11 you can change the size as the opening pressure, and the amount of depression of the closing of the inlet 2 and outlet 3 of the valve, and also by changing the geometrical parameters of the air ejector 18, you can apply a different fuel.

The proposed construction of the gas generator due to the installation of the fuel supply comprising a fuel pump with an electric motor, a fuel tank with a filter and a controlled system ejector mixing of air with fuel, turn the gas generator in an independent unit used wherever necessary air with high energy parameters.

Sources of information

1. theory of jet engines. Blade machine" edited Besticken, ed. Moscow, 1956, P.28-29.

2. Of the USSR. Auth. St. No. 1753761. 1989

The gas generator containing located in the combustion chamber intake and exhaust valves with rods connected to the main fuel supply channel reset it with the installed two-position valve which is connected with the Cam cylinder located therein a spring-loaded stepped valve, placed between two stops its progress, and mechanisms delays as mounted on the rods intake and exhaust valves based on the camera body of the spring elements, changing in the process of the deformation of the sign of his power on the reverse, characterized in that, in order to give him an opportunity of use as an independent unit installed, fuel tank filter, fuel pump with an electric motor, and the fuel system is equipped with a conical nozzle and adjustable air ejector.



 

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