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Friction losses in a lubricated thrust-loaded cageless angular-contract bearing
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Zaretsky, E. V. Allen, C. W. Townsend, D. P. |
| Copyright Year | 1973 |
| Description | The NASA spinning torque apparatus was modified to measure the spinning torque on a cageless ball thrust bearing. Friction torque was measured for thrust loads varying from 44.5 to 403 newtons (10 to 90 lb) at speeds of 1000, 2000, and 3000 rpm. Tests were conducted with di-2-ethylhexyl sebacate and a synthetic paraffinic oil. These tests were run with either oil jet lubrication or with a thin surface film of lubricant only. An analytical model which included rolling resistance was developed and extended from previous models for spinning torque and lubricant rheology. The model was extended by the inclusion of rolling resistance. The computed values were in fair agreement with the experimental results and confirmed previous hypotheses that a thin lubricant film gives minimum bearing torque and an oil jet flow of a viscous lubricant will result in considerable rolling torque in addition to the torque due to ball spin. |
| File Size | 1281386 |
| Page Count | 37 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730017757 |
| Archival Resource Key | ark:/13960/t5t775n1r |
| Language | English |
| Publisher Date | 1973-07-01 |
| Access Restriction | Open |
| Subject Keyword | Machine Elements And Processes Elastohydrodynamics Nondestructive Tests Performance Tests Ball Bearings Torquemeters Thrust Bearings Friction Measurement Lubrication Test Equipment Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
