Pnumatically actuated bi-propellant valve (PABV) system for a throttling vortex engine
Regulated pneumatic gas is supplied through a gas supply tube ( 14 ) which is welded to a pilot valve housing ( 18 ) which accommodates a solenoid valve ( 16 ). When the solenoid valve is electrically activated and opened, the pneumatic gas flows through a bifurcated channel ( 22 ) which is welded to the pilot valve housing and to a fuel valve mechanism ( 24 A) and to an oxidizer valve mechanism ( 24 B). The force of the pneumatic gas causes pistons ( 38 A, 38 B) to actuate respective poppets ( 36 A, 36 B). Movement of the poppets results in the dispensing of fuel propellant from a fuel outlet chamber ( 44 A) and the dispensing of oxidizer from an oxidizer outlet chamber ( 44 B). The fuel valve mechanism and oxidizer valve mechanism are positioned and oriented such that the exiting fuel and oxidizer are mixed in a vortex rocket engine.
1. A pneumatically actuated bi-propellant valve system ( 10 ), comprising:
a pilot valve assembly ( 12 ) having a supply tube ( 14 ) directly connecting to a pilot valve ( 16 ) secured to a pilot valve housing ( 18 );
a bifurcated channel ( 22 );
a pneumatic gas conduit ( 20 ) connecting to said supply tube ( 14 ) and said pilot valve ( 16 ), said pneumatic gas conduit further being connected to said bifurcated channel ( 22 );
a first valve mechanism ( 24 A) provided with a first housing ( 26 A) which forms a first aft chamber region ( 28 A), a first channel region ( 30 A) and a first front chamber region ( 32 A); said first aft chamber region ( 28 A) being provided with a first fitting ( 34 A) which connects to said bifurcated channel ( 22 ); said first channel region ( 30 A) accommodating a first poppet ( 36 A); a first piston ( 38 A) located in said first aft chamber region ( 28 A) makes direct contact with said first poppet ( 36 A); an inlet fuel tube ( 40 A) directly connecting to said first front chamber region ( 32 A); a first biasing mechanism ( 42 A) connected to said first piston and said first housing for impeding movement of said first piston toward the direction of said inlet fuel tube ( 38 A); a fuel outlet ( 44 A) directly connected to said first channel region;
a second valve mechanism ( 24 B) provided with a second housing ( 26 B) which forms a second aft chamber region ( 28 B), a second channel region ( 30 B) and a second front chamber region ( 32 B); said second aft chamber region ( 28 B) being provided with a second fitting ( 34 B) which connects to said bifurcated channel ( 22 ); said second channel region ( 30 B) accommodating a second poppet ( 36 B); a second piston ( 38 B) located in said second aft chamber region ( 28 B) makes direct contact with said second poppet ( 36 B); an inlet oxidizer tube ( 40 B) directly connecting to said second front chamber region ( 32 A); a second biasing mechanism ( 42 B) connected to said second piston ( 38 B) and said second housing ( 26 B) for impeding movement of said second piston in the direction of said inlet oxidizer tube ( 40 B); an oxidizer outlet ( 44 B) directly connected to said second channel region ( 30 B); and
wherein when said pilot valve ( 16 ) is open, pressurized gas flows from said supply tube ( 14 ) through conduit ( 20 ) and into said bifurcated channel ( 22 ) such that the pressurized gas exerts a sufficient force such that said first piston pushes said first poppet in the direction of said inlet fuel tube ( 40 A) so as to allow fuel from said inlet fuel tube to pass through said first front chamber region ( 32 A) into said first channel region ( 30 A) and out said fuel outlet ( 44 A); and
when said pilot valve ( 16 ) is open, the pressurized gas flows from said supply tube ( 14 ) through conduit ( 20 ) and into said bifurcated channel ( 22 ) such that the pressurized gas exerts a sufficient force such that said second piston pushes said second poppet ( 36 B) in the direction toward said inlet oxidizer tube ( 40 B) so as to allow oxidizer from said oxidizer inlet tube ( 40 B) to pass through said second front chamber region ( 32 B) into said second channel region ( 30 B) and out said oxidizer outlet ( 44 B).
2. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 1 , wherein: said pilot valve ( 16 ) is a solenoid pilot valve.
3. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 2 , wherein:
said bifurcated channel ( 22 ) includes a first path ( 22 A) which is connected to said first fitting ( 34 A) and to said first aft chamber region ( 28 A).
4. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 3 , wherein:
said bifurcated channel ( 22 ) includes a second path ( 22 B) which is connected to said second fitting ( 34 B) and to said second aft chamber region ( 28 B).
5. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 4 , wherein:
a fuel inlet fitting ( 45 A) is attached to said first housing ( 26 A) and is positioned within the first front chamber region ( 32 A), said inlet fuel tube ( 40 A) being attached to said fuel inlet fitting ( 45 A).
6. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 5 , wherein:
an oxidizer inlet fitting ( 45 A) is attached to said second housing ( 26 B) and is positioned within the second front chamber region ( 32 B), said inlet oxidizer tube ( 40 B) being attached to said oxidizer inlet fitting ( 45 A).
7. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 6 , wherein
said first biasing mechanism ( 42 A) is a spring.
8. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 7 , wherein
said second biasing mechanism ( 42 B) is a spring.
9. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 8 , wherein
a first fitting o-ring ( 50 A) contacts said first fitting ( 34 A) and said first housing ( 26 A).
10. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 9 , wherein
a second fitting o-ring ( 50 B) contacts said second fitting ( 34 B) and said second housing ( 26 B).
11. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 10 , wherein a first piston o-ring ( 52 A) contacts said first piston ( 38 A) and said first housing ( 26 A).
12. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 11 , wherein a second piston o-ring ( 52 B) contacts said second piston ( 38 B) and said second housing ( 26 B).
13. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 12 , wherein
a first poppet o-ring ( 54 A) contacts said first poppet ( 36 A) and said first housing ( 26 A).
14. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 13 , wherein
a second poppet o-ring ( 54 B) contacts said second poppet ( 36 B) and said second housing ( 26 B).
15. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 14 , wherein:
a first boundary wall ( 46 A) is formed in said first housing ( 26 A), said first boundary wall marking an interface between said first channel region ( 30 A) and said first front chamber region ( 32 A), when the pilot valve ( 16 ) is closed said first poppet ( 36 A) moves in the direction toward said first fitting ( 34 A) and prevents fuel flow from said first front chamber region ( 32 A) to said first channel region ( 30 A).
16. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 15 , wherein:
a second boundary wall ( 46 B) is formed in said second housing ( 26 B), said second boundary wall marking an interface between said second channel region ( 30 B) and said second front chamber region ( 32 B), and when the pilot valve ( 16 ) is closed said second poppet ( 36 B) moves in the direction toward said second fitting ( 34 B) and prevents fuel flow from said second front chamber region ( 32 B) to said first channel region ( 30 B).
17. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 16 , wherein:
said first poppet ( 36 A) is provided with a first poppet seat ( 48 A) for making contact with said first boundary wall ( 46 A) and said second poppet ( 36 B) is provided with a second poppet seat ( 48 B) for making contact with said second boundary wall ( 46 B).
18. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 17 , wherein:
said first valve mechanism ( 24 A) is provided with a first snap ring ( 58 A) for securing said first fitting ( 34 A) to said first housing ( 26 A) and said first valve mechanism ( 24 A) is further provided with a fuel-inlet-fitting snap ring ( 60 A) for securing said fuel inlet fitting ( 45 A) to said first housing.
19. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 18 , wherein:
said second valve mechanism ( 24 B) is provided with a second snap ring ( 58 B) for securing said second fitting ( 34 B) to said second housing ( 26 B), and said second valve mechanism ( 24 B) is further provided with a fuel-inlet-fitting snap ring ( 60 B) for securing said fuel inlet fitting ( 45 A) to said first housing.
20. A pneumatically actuated bi-propellant valve system ( 10 ), according to claim 19 , wherein:
said pressurized gas is nitrogen gas.