IE S037REPORT OF OAO “GRODNENSKII STEKLOZAVOD”, 2004
Compressor 2VM10-50/9: crankpin wear offset without shutting it down
Crankshaft journals built up metal, oil pressure rose, drive current dropped. 0.02–0.07 mm — crankshaft crankpin diameter, 179.89–179.96 → 179.93–179.99 mm; 2 A — drive motor stator current, 27 → 25 A; 41.7 % — oil pressure in the system, 1.2 → 1.7 atm (2004).
signed and stamped by both parties
Key results
| EQUIPMENT | CONDITION AT THE START OF WORK | WHAT WAS MEASURED |
|---|---|---|
| Compressor 2VM10-50/9 | Crankpins of the crankshaft worn by 0.04–0.11 mm from the nominal 180 mm; oil pressure 1.2 atm, stator current 27 A | Journal diameter in two planes on each stage, oil pressure in the system, drive stator current |
Crankshaft — crankpin diameter, measured before treatment and after 450 h
| MEASUREMENT POINT | BEFORE TREATMENT | AFTER 450 H | WEAR COMPENSATED |
|---|---|---|---|
| 1st stage, plane A | 180 – 0.04 mm | 180 – 0.01 mm | +0.03 mm |
| 1st stage, plane B | 180 – 0.08 mm | 180 – 0.01 mm | +0.07 mm |
| 2nd stage, plane A | 180 – 0.08 mm | 180 – 0.06 mm | +0.02 mm |
| 2nd stage, plane B | 180 – 0.11 mm | 180 – 0.07 mm | +0.04 mm |
The size is recorded as the nominal 180 mm with a deviation. At all four points the journal diameter increased: the layer built up exactly where the wear was.
Lubrication system and electric drive of the compressor
| PARAMETER | BEFORE TREATMENT | AFTER 450 H | CHANGE |
|---|---|---|---|
| Oil pressure in the system | 1.2 atm | 1.7 atm | +0.5 atm |
| Drive stator current | 27 A | 25 A | –2 A |
According to the conclusion of the report, the economic effect of the reduced power consumption amounted to 7.5 %.
Conclusion of the report
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:
Method for this machine:
Limits of this report: The results relate to the reciprocating compressor 2VM10-50/9 of OAO “Grodnenskii Steklozavod” and to the conditions of its normal operation; on other units and duties the figures may differ.