Partager

Ré-équilibrage dynamique du compresseur linéaire à piston unique d'un refroidisseur cryogénique Stirling.

Dynamic counterbalancing the single-piston linear compressor of a Stirling cryogenic cooler.

Auteurs : VEPRIK A., NACHMAN I., PUNDAK N.

Type d'article : Article

Résumé

Low vibration Stirling cryocoolers often rely on dual-piston linear compressors, the known disadvantages of which, as compared to their single-piston rivals, are: low reliability, increased power consumption, price, bulk, sensitivity to external vibration and g-forces. However, because of the inherently low level of vibration export, as required in numerous vibration sensitive electronic and electro-optic applications, the dual-piston approach has become prevalent in today's industrial practice. The authors report on the novel approach to the passive control of a fundamental component of a vibration export from a single-piston compressor down to the levels typical for the actively controlled dual-piston rival. The technique relies on the newly proposed principle of dynamic counterbalancing, where an auxiliary movable mass is flexibly attached to a movable piston assembly and to the stationary compressor casing using auxiliary mechanical springs. The proper design of such a ''spring-mass-spring" counterbalancer yields zero vibration export at minimum electrical power and current consumed by the motor. Based on the theoretical analysis, the design of the single-piston compressor of 1 W at 77 K Ricor model K529N Stirling cryocooler was enhanced by adding such a counterbalancer. The obtained experimental results are in full agreement with the theoretical prediction. From experiment, the vibration export at driving frequency was reduced 57-fold at practically the same electrical current and power consumed by the compressor actuator as compared with the basic cooler. [Reprinted with permission from Elsevier. Copyright, 2008].

Détails

  • Titre original : Dynamic counterbalancing the single-piston linear compressor of a Stirling cryogenic cooler.
  • Identifiant de la fiche : 2009-1868
  • Langues : Anglais
  • Source : Cryogenics - vol. 49 - n. 5
  • Date d'édition : 05/2009
  • DOI : http://dx.doi.org/10.1016/j.cryogenics.2008.12.003

Liens


Voir d'autres articles du même numéro (1)
Voir la source

Indexation