Accession Number:

AD0760563

Title:

Dual Diameter Roller Bearing - 3.5 Million DN-600 F

Descriptive Note:

Final rept. 23 Jun 1971-31 Dec 1972

Corporate Author:

FRANKLIN INST RESEARCH LABS PHILADELPHIA PA

Personal Author(s):

• Rumberger, John
• Dunfee, James
• Filetti, Edmund
• Gubernick, David

Report Date:

1973-05-01

Pagination or Media Count:

190.0

Abstract:

Five gas turbine engine mainshaft roller bearing configurations were investigated for capability of sustained performance at DN values Bore in mm x Speed in RPM from 2 million to 3.5 million and normal operating temperatures to 600F. A unique Dual Diameter Roller was selected for the final analysis of stress and lubrication parameters, design and fabrication. A 140 mm Bore Dual Diameter Roller Bearing operated successfully for 30 min. continuous operation at 25,000 RPM 3.5 million DN with stabilized outer race temperatures above 525F. Lubrication was with Polyphenyl Ether 5P4E in an air environment.

Descriptors:

• *GAS TURBINES
• KINEMATICS
• STRESSES
• THERMAL ANALYSIS
• LUBRICANTS
• LUBRICATION
• DRIVES
• LIFE EXPECTANCY(SERVICE LIFE)
• PERFORMANCE(ENGINEERING)

Subject Categories:

• Machinery and Tools
• Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE