IE A078KAZZINC JSC REPORT · 1700 OPERATING HOURS IN SERVICE
4VM 10-120/9 compressor: less power to the drive, shaft geometry preserved
Mechanical losses in the cylinder-piston group and crank mechanism decreased, oil pressure rose, the shaft showed no wear. 14.3 % — drive rotor current under load, 210 → 180 A; 0.2 kgf/cm² — oil pressure in the running gear, 4.0 → 4.2 kgf/cm² (2002).
signed and stamped
Key results
| ASSEMBLY | HOURS RUN AT TEST START | WHAT WAS MEASURED |
|---|---|---|
| Running gear: crank mechanism, Ø180 crankshaft, bearing shells, crosshead bush | over 40,000 operating hours since 1992, last overhaul — 2001 | drive current, oil pressure, dimensions of journals and bearing shells |
| Cylinder-piston group | same machine, serial no. 1700 | level of the ultrasonic component by compressor rows |
Drive current and oil pressure: before treatment and after 1700 operating hours
| PARAMETER | BEFORE TREATMENT | AFTER 1700 OPERATING HOURS | CHANGE |
|---|---|---|---|
| Drive rotor current, under load | 210 A | 180 A | −14.3 % |
| Drive rotor current, no load | 180 A | 170 A | −5.6 % |
| Drive stator current, under load | 70 A | 70 A | no change |
| Drive stator current, no load | 44 A | 44 A | no change |
| Oil pressure in the running gear lubrication system | 4.0 kgf/cm² | 4.2 kgf/cm² | +0.2 kgf/cm² |
Readings of the drive's standard instruments. Motor nameplate: 800 kW, stator current 81 A, rotor current 260 A — the machine ran in an unchanged load mode.
Conclusion of the Kazzinc JSC commission
Current equivalent
- Revitalizant gel for compressors and bearingsCompressors · bearings · spindles
- Revitalizant gel for cylinder restorationEngine cylinders, deep wear
How such units are treated:
About this result:
Limits of this report: The results refer to a 4VM 10-120/9 reciprocating compressor with an 800 kW synchronous drive under the industrial operating conditions of LGOK; on other machines and duty modes the figures may differ. The treatment was performed by the contractor W.F.G. Corporation LLP (XADO technologies), whose representatives sat on the commission alongside officials of Kazzinc JSC.