BEARING LUBRICATION UNDER SEVERE CONDITIONS.
Abstract
The possibility of obtaining bearing failure (high bearing deposits) by prolonged bearing operation with an increased oil sump charge was investigated during this period. Increasing the lubricant charge from two gallons to five gallons did not result in bearing failure with a MIL-L7808E lubricant operating in the 35mm ball bearing rig at 500 F lubricant-in temperature. Fail ure by loss of lubricant was obtained as in all previous tests with various lubricants. Increasing the lubricant charge increased the total operating time from 36-1/2 hours (148 passes) to 114-1/4 hours (224 passes) but there was practically no difference in the operation of the bearing. For a system which fails by loss of lubricant two equations are derived which relate initial lubricant charge, termination lubricant charge, lubricant recovery rate, and lubricant flow rate with total operating time and number of lubricant passes. The experimental values of time and number of passes for the current tests are in excellent agreement with values predicted by the derived expressions. A heated dual-tank reservoir to investigate the effect of operating with a high bulk oil temperature was built and is presently in operation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 29, 1964
- Accession Number
- AD0431873