IE S051COMMISSION REPORT OF THE K. A. RUMYANTSEV MINE
Mine main fan: bearing clearance reduced, noise and heat lowered
Clearance in the fan support decreased, rolling surfaces smoothed out, noise and heating fell. 16–24 % — bearing radial clearance, 0.29–0.31 → 0.22–0.26 mm (2001).
and stamped by the enterprise
Key result
| UNIT | CONDITION AT THE START OF WORK | WHAT WAS MEASURED |
|---|---|---|
| Main fan No. 1, rolling bearing of the support | Radial clearance 0.29–0.31 mm; roller and race surfaces deformed; extraneous noise, elevated operating temperature | Radial clearance — three measurements under identical conditions; surface condition when the unit was opened |
Bearing radial clearance — three control measurements
| MEASUREMENT | RADIAL CLEARANCE | REDUCTION VS. BASELINE |
|---|---|---|
| Before treatment, October 2000 | 0.29–0.31 mm | — |
| During treatment, December 2000 | 0.26–0.29 mm | 0.02–0.03 mm |
| After treatment, January 2001 | 0.22–0.26 mm | 0.05–0.07 mm |
The clearance was measured at several points, hence it is recorded as a range. The final reduction of 0.05–0.07 mm is also stated in the text of the report.
Condition of the unit when the bearing was opened
| WHAT WAS ASSESSED | BEFORE TREATMENT | AFTER TREATMENT |
|---|---|---|
| Surfaces of rollers, inner and outer races | Deformed | Smoothing of the previously deformed surfaces |
| Extraneous noise | Present | Reduced noise |
| Bearing operating temperature | Elevated | Lower temperature |
Assessed by visual inspection when the unit was opened and by ear: the report gives no numerical values for these indicators.
Commission's conclusion
Current equivalent
Revitalizant gel for compressors and bearings →
Piston, screw and centrifugal compressors; rolling and sliding bearings running in an oil bath; machine-tool spindle units and slideways.
How such units are treated:
About this result:
Limits of this report: The results relate to the rolling bearing of the support of main fan No. 1 of the main ventilation unit at the K. A. Rumyantsev Mine; on other machines and operating modes the figures may differ.