Temperature lowering apparatus using cryogenic expansion with the aid of spirals
AssigneeCommissariat a l'Energie Atomique
InventorGerard Claudet
Life of this patent
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Abstract
The apparatus for the expansion of fluid in the gaseous or liquid state or in double phase is characterized in that it has an expansion compartment comprising: a first spiral (72), a second spiral (70) located within said first spiral, means (52, 63) to permit a circular translation movement without self-rotation of the second spiral within the first spiral during the expansion of a fluid.
Claims30
In an apparatus for lowering the temperature of a cryogenic fluid in an engine by fluid expansion in the gaseous or liquid state or in double phase wherein the engine has an expansion compartment with an admitting tube for admitting the fluid to be expanded and an exhaust, the improvement comprising:
- a first spiral (28, 72, 112, 171, 172, 173),
- a second spiral (30, 70, 77, 94, 113, 147, 148, 149) placed within said first spiral, and
- means (52, 63;
- 80, 83, 85;
- 93, 95 97;
- 116, 117, 121) to permit a circular translation movement without self-rotation of the second spiral within the first spiral, during the expansion of said fluid.
In an apparatus as defined as in 11, the bearing being of the gas type.
Fluid expansion system for lowering the temperature of a cryogenic fluid in an engine by fluid expansion incorporating at least two expansion stages with each stage comprising
- a first spiral (28, 72, 112, 171, 172, 173),
- a second spiral (30, 70, 77, 94, 113, 147, 148, 149) placed within said first spiral, and
- means (52, 63;
- 80, 83, 85;
- 93, 95, 97;
- 116, 117, 121) to permit a circular translation movement without self-rotation of the second spiral within the first spiral, during the expansion of the fluid.
Cryogenic expansion engine comprising a compressor, a heat exchanger and an expansion apparatus for lowering the temperature of a cryogenic fluid in an expansion compartment of the engine by fluid expansion, with the expansion compartment having an admitting tube for admitting the fluid to be expanded and an exhaust, said expansion apparatus comprising:
- a first spiral(28, 72, 112, 171, 172, 173),
- a second spiral (30, 70, 77, 94, 113, 147, 148, 149) placed within said first spiral, and
- means (52, 63;
- 80, 83, 85;
- 93, 95, 97;
- 116, 117, 121) to permit a circular translation movement without self-rotation of the second spiral within the first spiral, during the expansion of the fluid.
Dependencies are inferred from the claim text.