Test Methods and Results of a Study of Greases for Use in Roto-Launch Valve Lubrication.

Abstract

The extended use of a MIL-G-23549 grease for lubrication of a roto-launch valve maintained at a temperature of 700 F caused a significant lubrication problem. This was brought about by decomposition of the grease into a solid mixture of molybdenum disulfide and clay which would clog grease lines in the vicinity of the valve. As an approach to this problem, several alternate grease formulations capable of providing lubrication under high load conditions were evaluated for their tendency to decompose at high temperatures. Testing was done by measuring the adhesion of grease residues to a steel surface and by measuring the amount of pressure required to force grease through a test rig maintained at 700 F. These studies indicated that the use of alkly-urea thickeners in place of clay thickeners decreases the tendency of a grease to clog grease lines under high temperature conditions. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 11, 1981
Accession Number
ADA097565

Entities

People

  • Leon Stallings
  • Paul Kennedy

Organizations

  • Naval Air Warfare Center Warminster

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Adhesion
  • Adhesives
  • Aircrafts
  • Decomposition
  • Dermatologic Agents
  • Failure Mode And Effect Analysis
  • Films
  • Greases
  • High Temperature
  • Lubricants
  • Lubrication
  • Materials
  • Measurement
  • Numbers
  • Test And Evaluation
  • Test Methods
  • Urea

Readers

  • Combustion and Flow Dynamics.
  • Petroleum Engineering
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).