Title:
RECIPROCATING TYPE DEVICE AND LOW TEMPERATURE COOLER USING SAME
Document Type and Number:
Japanese Patent JPS5879462
Kind Code:
A
Abstract:
@ A long lifetime Stirling cycle cryogenic cooler particularly adapted for space applications comprised of a compressor section (10) centrally aligned end to end with an expansion section (12) and respectively including a reciprocating compressor piston (14) and displacer (16) radially suspended in interconnected cylindrical housings (18, 20) by active magnetic bearings (26, 28, 30, 32) and having adjacent reduced clearance regions (82, 84, 108) so as to be in non-contacting relationship therewith and wherein one or more of these regions operate as clearance seals. The piston (14) and displacer (16) are reciprocated in their housings (18, 20) by linear drive motors (48, 52) to vary the volume of respectively adjacent compression and expansion spaces (44, 46) which contain a gaseous working fluid and a thermal regenerator (95) to effect Stirling cycle cryogenic cooling. Electrical circuit means (140, 142) are additionally included for energizing the magnetic bearings (26, 28, 30, 32) and for controlling the stroke amplitudes and relative phase angle between the compressor piston (14) and displacer (16) during the cooling cycle.
Inventors:
MATSUKUSU JIYOOJI GEISAA
ARAN SHIYAAMAN
FUIRITSUPU ARUBAATO SUCHIYUUDA
AREKISANDAA DANIIRUZU
MAIKERU FUIRITSUPU GORUDOUSUKI
ARAN SHIYAAMAN
FUIRITSUPU ARUBAATO SUCHIYUUDA
AREKISANDAA DANIIRUZU
MAIKERU FUIRITSUPU GORUDOUSUKI
Application Number:
JP17381582A
Publication Date:
May 13, 1983
Filing Date:
October 01, 1982
Export Citation:
Assignee:
NASA
International Classes:
H02K33/00; F02G1/043; F02G1/053; F04B35/04; F16C39/06; F25B9/14; H02K11/00; H02K33/16; (IPC1-7): F02G1/043; F04B35/04; F25B1/02; H02K11/00; H02K33/00
Domestic Patent References:
| JPS54126913A | 1979-10-02 | |||
| JPS5688664A | 1981-07-18 |
Attorney, Agent or Firm:
Takehiko Suzue