Connexion utilisateur 0 Panier
Accueil Livres eBooks Revues spécialisées Références et comptes rendus Auteurs, éditeurs, examinateurs Index A-Z des produits
Proceedings of Symposium on Energy Engineering in the 21st Century (SEE2000) Volume I-IV

ISBN Imprimer: 1-56700-132-7

EXPERIMENTAL INVESTIGATION OF FRICTION CHARACTERISTICS OF INSTRUMENT BALL BEARINGS IN VACUUM AND AT LHe TEMPERATURES

Résumé

The friction performance of precision instrument-size ball bearings at cryogenic temperatures are special important in designing space instruments which are need to be cooled to low temperatures during operation. The friction characteristics of ball bearings can be obtained by measuring the friction heat generated by the bearings. A reliable method for measuring the friction heat in vacuum and at liquid helium (LHe) temperatures is proposed in this paper. The experimental results for a stainless steel ball bearing with different rotating speeds, axial pre-loads and temperatures are presented. The friction heat generated at the bearing sample is found to be proportional to both rotating speed and axial pre-load and to be independent of temperature in the test range.
Accueil Portail numérique Begell Bibliothèque numérique Begell Revues spécialisées Livres eBooks Références et comptes rendus Auteurs, éditeurs, examinateurs Index A-Z des produits Prix et politiques d'abonnement A propos de Begell House Contactez-nous Language English 中文 Русский 日本語 Português Deutsch Français Español