Refrigeration system with clearance seals

Refrigeration – Gas compression – heat regeneration and expansion – e.g.,...

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60520, 92212, 123193P, 277DIG6, F25B 900

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active

045437920

ABSTRACT:
In a split Stirling refrigerator, the dynamic seals about the displacer are virtually dragless clearance seals. The displacer is driven by pressure differential between a working gas and a gas in a spring volume, but the displacer movement is retarded until about peak pressure by forces resulting from fluid friction of gas flowing through the regenerative matrix. The fluid friction results in pressure differentials across the displacer, and the retarding effects of those pressure differentials can be increased to eliminate the need for any Coulomb friction to retard the displacer movement.

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