Tapered Roller Bearing Development for Aircraft Turbine Engines.

摘要

Finite element methods were used to structurally analyze various potential cage designs for tapered roller bearings operating at 3.5 million DN. The race guided Z design exhibited the greatest strength. Short duration evaluation tests verified these findings. Performance tests were conducted to determine bearing loss characteristics and oil-off survival. Parameters investigated, which influence losses (torque or heat generation), were speed, load, lubricant properties, lubricant flow rate and lubricant distribution. Oil-off survival tests were successfully run at 1.5 and 2.0 million DN. The bearing fatigue life tests conducted at 3 million DN showed a high degree of life scatter. The 90 percent survival level was 2.78 times the unadjusted catalog life expectancy. (Author)