AN INVESTIGATION OF THE MECHANICAL AND CHEMICAL PROPERTIES OF OBERON DIESEL ENGINE MOUNTS

Authors
  1. Hiltz, J.A.
  2. Matthews, J.R.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The report addresses concerns that arose about the diesel engines for the Oberon submarines when increasing crankshaft deflections were observed over a six month period in 1992. Specific concerns centered on the type of rubber used in the engine mounts, the effect of oil contamination on the mechanical response of the mounts, and the effect of load on the deflection of the mounts. Results are presented of chemical analysis, mechanical testing including compression tests and creep tests, and Shore 'A' hardness testing of mounts that had been in service and 'new' mounts from the stores system. The results led to several conclusion regarding the engine mounts: natural rubber mounts are not suitable for use in areas where they come in contact with diesel lubricating oil and diesel fuel; a good correlation between the compression and Shore 'A' hardness of the mounts exists and can be used to select pairs of mounts with similar mechanical properties; and the mounts creep and therefore should be installed and allowed to relax for a week prior to shimming.
Keywords
Engine mounts;Oberon submarines;Chemical degradation
Report Number
DREA-TC-93-307 — Technical Communication
Date of publication
01 Sep 1993
Number of Pages
26
DSTKIM No
94-01566
CANDIS No
134617
Format(s):
Hardcopy;Originator's fiche received by DSIS

Permanent link

Document 1 of 1

Date modified: