Procedure for qualifying synthetic base gear lubricant

Details Procedure for qualifying synthetic base gear lubricant Procedure for qualifying synthetic base gear lubricant

G - Physics

01

N

G01N 33/30 (2006.01) G01N 33/44 (2006.01)

Patent

CA 2042928

A procedure for qualifying a proposed synthetic lubricant includes: (1) compatibility testing the proposed lubricant with previously approved synthetic lubricants; (2) stability testing the lubricant for thermal oxidation by testing the lubricant in a heated gear box; (3) corrosion testing the proposed lubricant by a copper strip tarnish test; (4) field testing the proposed lubricant to evaluate the ability of the lubricant to withstand extended drain intervals while still performing its function; and analyzing all of the results of those tests. In another embodiment, the lubricant furthermore undergoes a seal life test to evaluate the appearance of various covers and seals for degradation due to long term exposure to the lubricant.

Procédé d'homologation d'un lubrifiant synthétique proposé. Ce procédé comporte les étapes suivantes : 1) essai de compatibilité du lubrifiant proposé avec des lubrifiants synthétiques déjà approuvés; 2) essai de stabilité du lubrifiant relativement à l'oxydation thermique consistant à faire l'essai du lubrifiant dans une boîte de vitesses; 3) essai de la corrosion du lubrifiant consistant à effectuer un essai de ternissement d'une lame de cuivre; 4) essai sur place du lubrifiant afin d'évaluer sa capacité à supporter des périodes prolongées d'assèchement tout en restant fonctionnel; et analyse de tous les résultats de ces essais. Dans une autre configuration, le lubrifiant subit également un essai de durée d'étanchéité axé sur l'évaluation du taux de dégradation subi par divers types de couvercles et dispositifs d'étanchéité à la suite d'une exposition prolongée au lubrifiant.

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