Accession Number : ADA288685

Title :   Development of a High Temperature, High Speed Disc Lubricant Test Machine.

Descriptive Note : Final rept. 1 Sep 87-30 Jun 94,

Corporate Author : IMPERIAL COLL OF SCIENCE AND TECHNOLOGY LONDON (UNITED KINGDOM) DEPT OF MECHA NICAL ENGINEERING

Personal Author(s) : Nicolson, David M. ; Sayles, Richard S.

PDF Url : ADA288685

Report Date : JUN 1994

Pagination or Media Count : 97

Abstract : Scuffing and adhesive failure modes are outlined to provide the context for a more detailed review of gear lubrication distinguishing, in particular, elastohydrodynamic and boundary lubrication regimes. The major scuffing theories, are considered against the particular requirements of lubricating at high temperatures and entrainment speeds. Existing lubricant testers are classified and evaluated with respect to their correlation with field experience. The need for a disc machine utilizing mini-discs driven at high speeds is proposed to satisfy both existing and future test requirements. Details of rig design, commissioning and development are detailed together with prototype experience which dictated that improved repeatability and reproducibility over current methods outweighs incomplete reproduction of the contact cycle. Early failures of a similar nature to those experienced in high speed aerospace applications are being used to study the mechanism of high speed (high temperature) scuffing with synthetic lubricants.

Descriptors :   *LOADS(FORCES), *TEST EQUIPMENT, *LUBRICANTS, TEST AND EVALUATION, REQUIREMENTS, HIGH TEMPERATURE, HIGH VELOCITY, PROTOTYPES, AEROSPACE SYSTEMS, GAS BEARINGS, FAILURE(MECHANICS), HYDRODYNAMICS, REPRODUCIBILITY, THERMAL CYCLING TESTS, THERMAL STRESSES, ADHESIVES, ENTRAINMENT, HYDROELASTICITY, LUBRICATION, TRANSMISSION GEARS, TORQUE.

Subject Categories : Lubricants and Hydraulic Fluids
      Test Facilities, Equipment and Methods
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE