IE A117COMMISSION REPORT OF KHARKIV METRO STATE ENTERPRISE
EK-4B metro car compressor: faster air system charging no teardown, in service
The compressors began filling faster, fill time kept decreasing from measurement to measurement. 5–34 % — output when charging to 6 kgf/cm², 3:33-4:16 → 3:11-3:38 min:s; 3–5 % — output when charging to 8 kgf/cm², 5:12-5:37 → 5:03-5:21 min:s (1999).
signed and stamped
Key result
| CAR | MILEAGE OVER THE OBSERVATION PERIOD | PERIOD AND FREQUENCY OF MEASUREMENTS |
|---|---|---|
| No. 9300 | 43 739 km | 15.04 – 03.09.1999, four measurement series |
| No. 9730 | 38 747 km | 15.04 – 03.09.1999, four measurement series |
| No. 9726 | 27 789 km | 25.05 – 09.09.1999, three measurement series |
Air system charging time — first and last measurement of the period
| CAR | PRESSURE | FIRST MEASUREMENT | LAST MEASUREMENT | FASTER BY |
|---|---|---|---|---|
| No. 9300 | 6 kgf/cm² | 3:57 | 3:38 | 19 s |
| No. 9300 | 8 kgf/cm² | 5:37 | 5:21 | 16 s |
| No. 9730 | 6 kgf/cm² | 4:16 | 3:11 | 1 min 05 s |
| No. 9726 | 6 kgf/cm² | 3:33 | 3:23 | 10 s |
| No. 9726 | 8 kgf/cm² | 5:12 | 5:03 | 9 s |
Output was checked in accordance with instruction TsMetro/4135; in every subsequent series the charging time was shorter than in the previous one.
Commission conclusions
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:
Limits of this report: The results relate to EK-4B compressors of metro cars under the service conditions of the Saltovskoye electric depot; on other equipment the figures may differ. RVS is an obsolete XADO designation, the zero-generation compounds; the current product generation is revitalizants.