Seal-less cryogenic expander
In an expander for use in a split Stirling cycle refrigeration system of the type wherein a displacer moves with reciprocating motion inside an expander housing, and wherein a plunger force and a regenerator force are formed on the displacer, the plunger force cyclically varying and having a time of minimum and maximum plunger force amplitude, and the regenerator force cyclically varying and having a time of minimum and maximum regenerator force amplitude, the improvement is described comprising: (a) means for maintaining displacer forces, such that the maximum plunger force amplitude is substantially equal to the maximum regenerator force amplitude; and (b) means for adjusting a time difference, the time difference being the time between the time of maximum plunger force and the time of maximum regenerator force such that a measure of the cooling power of the refrigeration system is maximized.
- Assignee:
- Raytheon Co., Lexington, MA
- Patent Number(s):
- US 4711650
- Application Number:
- TRN: 88-013365
- OSTI ID:
- 5364286
- Resource Relation:
- Patent File Date: Filed date 4 Sep 1986
- Country of Publication:
- United States
- Language:
- English
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