IE A050COMMISSION REPORT OF ROSAVA JV JSC, 2004
K-250 turbocompressor: lower power draw and vibration with no shutdown for repair
Idle-running power consumption of the electric motor decreased, bearing support vibration fell. 5.3 % — power consumed by the motor at no load, 743.04 → 703.4 kW; 27–56 % — vibration displacement of the bearing supports, 0.5–1.9 → 0.05–1.6 µm (2004).
of Rosava JV JSCSix signatures, approved by the technical director, company stamps
Key results
| ASSEMBLY | RUNNING TIME AFTER TREATMENT | WHAT WAS MEASURED |
|---|---|---|
| Synchronous drive motor | 960 h | Power consumption, stator current, rotor current |
| Turbocompressor bearing supports, 8 pcs. | 960 h | Vibration displacement in two directions at each support |
Synchronous drive motor — no-load run, air pressure 1.2 atm, capacity 7100 m³/h
| PARAMETER | BEFORE, 08.12.2003 | AFTER, 02.02.2004 | CHANGE |
|---|---|---|---|
| Power consumption | 743.04 kW | 703.4 kW | −5.3 % |
| Stator current | 85 A | 85 A | No change |
| Rotor current (excitation) | 250 A | 250 A | No change |
Power — from the MODB52as electricity meter with transformation ratios Ki = 60 and Ku = 60; currents — from the station's standard instruments.
Turbocompressor bearing supports — vibration displacement, µm
| SUPPORT | VERTICAL, BEFORE → AFTER | TRANSVERSE, BEFORE → AFTER |
|---|---|---|
| Support No. 1 | 0.75 → 0.5 | 0.75 → 0.55 |
| Support No. 2 | 1.6 → 1.5 | 1.9 → 1.6 |
| Support No. 3 | 1.3 → 0.5 | 1.4 → 0.6 |
| Support No. 4 | 0.8 → 0.35 | 0.7 → 0.05 |
| Support No. 5 | 0.7 → 0.43 | 1.1 → 1.0 |
| Support No. 6 | 0.5 → 0.5 | 0.5 → 0.3 |
| Support No. 7 | 0.7 → 0.45 | 1.0 → 0.5 |
| Support No. 8 | 0.7 → 0.35 | 0.7 → 0.45 |
Measured with a VIP-2 instrument in two directions at each of the eight supports: vibration displacement decreased at 15 points out of 16.
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:
Method for this machine:
Limits of this report: The results refer to the K-250 turbocompressor with a synchronous drive motor at the compressor station of Rosava JV JSC; on other units and operating modes the figures may differ.