Folded cryocooler design

摘要

A compact cryocooler includes a gas compression piston ( 304 ) supported for reciprocal linear translation along a first longitudinal axis ( 308 ) and a gas displacing piston ( 362 ) supported for reciprocal linear translation along a second longitudinal axis ( 366 ). The first longitudinal axis ( 308 ) and second longitudinal axis ( 366 ) are substantially orthogonal. A rotary motor ( 302 ) rotates a rotor ( 324 ) and associated motor shaft ( 320 ) about a motor rotation axis ( 328 ) disposed substantially parallel with the second longitudinal axis ( 366 ). Motor shaft ( 320 ) first and second mounting features ( 336, 340 ) traverse first and second eccentric paths around the motor rotation axis. A first drive coupling couples the first mounting feature ( 336 ) with the gas compression piston ( 304 ) and delivers a reciprocal linear translation along the first longitudinal axis ( 308 ) thereto. A second drive coupling couples the second mounting feature ( 340 ) with the gas displacing piston ( 362 ) and delivers a reciprocal linear translation along the second longitudinal axis ( 366 ) thereto.