Multi-stage gas generator with thermal uncoupling of the propellant charges
First Claim
1. A multi-stage gas generator, comprising:
- an outer housing with a cylinder outer wall centered on an axis, at least spaced apart first and second combustion chambers in said housing, each combustion chamber being filled with a propellant charge;
each one of said combustion chambers having an associated igniter for the independent activation of each propellant charge; and
first and second filter housings centered on said axis and located between said first and second combustion chambers;
said first filter housing having a first filter chamber containing a first cylindrical filter centered on said axis, a first wall permitting first gas flow into the first filter chamber from said first combustion chamber, a second wall spaced from said second filter housing, and first gas flow openings for directing said first gas flow radially from said first filter chamber, said first gas flow being directed radially through said first cylindrical filter;
said second filter housing having a second filter chamber containing a second cylindrical filter centered on said axis, a third wall permitting second gas flow from said second combustion chamber into said second filter chamber, a fourth wall spaced from said second wall, and second gas flow openings for directing said second gas flow radially from said second filter chamber, said second gas flow being directed radially through said second cylindrical filter;
at least one thermal insulation arrangement between said second and fourth walls, which arrangement reduces a transport of thermal energy, to the other non-ignited propellant charge such that said non-ignited propellant charge remains below its autogenous ignition temperature, and where said first and second filter housings are arranged between said combustion chambers in a manner that gas is prevented from flowing from one filter chamber to the other filter chamber.
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Accused Products
Abstract
A multi-stage gas generator comprises a housing with an outer wall and also inner walls, at least two combustion chambers filled with at least one propellant charge, one igniter each associated with a propellant charge for the independent activation of each propellant charge, and at least one thermal insulation arrangement between the propellant charges. The arrangement reduces a transport of thermal energy, generated on the ignition of a propellant charge, to the other non-ignited propellant charge to such a high extent that the non-ignited propellant charge remains below its autogenous ignition temperature. Instead of or additionally to the thermal arrangement a cooling arrangement may be provided.
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Citations
10 Claims
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1. A multi-stage gas generator, comprising:
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an outer housing with a cylinder outer wall centered on an axis, at least spaced apart first and second combustion chambers in said housing, each combustion chamber being filled with a propellant charge;
each one of said combustion chambers having an associated igniter for the independent activation of each propellant charge; and
first and second filter housings centered on said axis and located between said first and second combustion chambers;
said first filter housing having a first filter chamber containing a first cylindrical filter centered on said axis, a first wall permitting first gas flow into the first filter chamber from said first combustion chamber, a second wall spaced from said second filter housing, and first gas flow openings for directing said first gas flow radially from said first filter chamber, said first gas flow being directed radially through said first cylindrical filter;
said second filter housing having a second filter chamber containing a second cylindrical filter centered on said axis, a third wall permitting second gas flow from said second combustion chamber into said second filter chamber, a fourth wall spaced from said second wall, and second gas flow openings for directing said second gas flow radially from said second filter chamber, said second gas flow being directed radially through said second cylindrical filter;
at least one thermal insulation arrangement between said second and fourth walls, which arrangement reduces a transport of thermal energy, to the other non-ignited propellant charge such that said non-ignited propellant charge remains below its autogenous ignition temperature, and where said first and second filter housings are arranged between said combustion chambers in a manner that gas is prevented from flowing from one filter chamber to the other filter chamber. - View Dependent Claims (2, 3, 4, 5)
insulating material;
gas; and
vacuum.
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4. The multi-stage gas generator according to claim 1, wherein said insulating material consists of one of plastic or ceramic.
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5. The multi-stage gas generator according to claim 1, wherein said outer housing has protruding cooling ribs.
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6. A multi-stage gas generator, comprising:
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a housing with an outer wall and also inner walls;
at least two combustion chambers filled with a propellant charge;
one igniter associated with each one of said combustion chambers for the independent activation of each propellant charge; and
at least one thermal insulation arrangement between said propellant charges, which arrangement reduces a transport of thermal energy, generated on the ignition of a propellant charge, to the other non-ignited propellant charge to such a high extent that said non-ignited propellant charge remains below its autogenous ignition temperature, wherein each combustion chamber has its own filter chamber, and wherein said filter chambers are arranged between said combustion chambers and are spaced apart by said thermal insulation arrangement wherein an intermediate space between said two filter chambers has a vacuum.
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- 7. A multi-stage gas generator, with a housing with external and also internal walls, at least two combustion chambers filled with a propellant charge, one igniter associated with each one of said combustion chambers for the independent activation of each propellant charge, and at least one cooling arrangement which at least partially surrounds said housing adjacent at least one of said combustion chambers, said cooling arrangement reducing a transport of thermal energy, generated on the ignition of a propellant charge, to the other non-ignited propellant charge to such a high extent that said non-ignited propellant charge remains below its autogenous ignition temperature, wherein said cooling arrangement includes cooling ribs protruding from said external wall.
Specification