IE A087JOINT COMMISSION ACTS 01.02 — 02.03.2001
ORU-220 kV compressor and GAZ-31: worn units recovered performance without teardown
Cylinder compression rose, bearing vibration dropped, air pressure increased. 2.5× — compression in the GAZ-31 cylinders, 2.9–3.0 → 7.3–7.5 atm; 11–31 % — air pressure at the compressor gauges, 2.7–7.5 → 3.0–9.8 atm; 17–31 % — vibration of compressor bearings No. 3 and No. 4, 50–240 → 40–200 mkr (2001).
turning gear of power unit No. 2, GAZ-31 carbearings 2314 and 313 SEN-4B · bearings No. 3 and No. 4 and the compressor piston group · petrol engine, gearbox, reduction gears
Razdanskaya TES CJSC and Armen-XADO
Key results
| EQUIPMENT | CONDITION AT THE START OF TESTS | WHAT WAS MEASURED |
|---|---|---|
| Compressor No. 1, ORU-220 kV, three-stage piston type | Increased noise, thermal gap of the 1st-stage piston ring 1.6 mm, motor current 60 A | Vibration of bearings No. 3 and No. 4, air pressure by the gauges |
| Turning gear motor of power unit No. 2 | Bearing 2314 — pitting, wear, run-out; bearing 313 SEN-4B — radial clearance 0.04, roughness and run-out | Condition of the bearings in service |
| GAZ-31 car, petrol engine | Compression 2.9–3.0 atm in all four cylinders | Compression after 1500 and 3000 km of mileage |
Compressor No. 1, ORU-220 kV — bearing vibration
| MEASUREMENT DIRECTION | BEARING No. 3, BEFORE → AFTER | BEARING No. 4, BEFORE → AFTER |
|---|---|---|
| Vertical | 100 → 80 | 50 → 40 |
| Transverse | 240 → 200 | 210 → 200 |
| Axial | 130 → 90 | 130 → 90 |
Measured in three directions on each bearing after 208 h of operation; the vibration level is given in the units used in the act — “mkr”.
Compressor No. 1, ORU-220 kV — air pressure
| GAUGE | BEFORE TREATMENT | AFTER 208 H OF OPERATION |
|---|---|---|
| Gauge 1 | 2.7 atm | 3.0 atm |
| Gauge 2 | 7.5 atm | 9.8 atm |
The compressor's standard gauges; the rise in air pressure follows from the restored sealing of the 1st-stage piston group.
GAZ-31 car — compression by cylinder, atm
| CYLINDER | BEFORE TREATMENT | AFTER 1500 KM | AFTER 3000 KM |
|---|---|---|---|
| Cylinder 1 | 2.9 | 3.1 | 7.3 |
| Cylinder 2 | 3.0 | 3.7 | 7.5 |
| Cylinder 3 | 3.0 | 4.9 | 7.5 |
| Cylinder 4 | 3.0 | 4.9 | 7.5 |
Compression grew with mileage: by 3000 km three cylinders out of four came to one and the same value — the engine started running evenly.
Commission conclusions
Current equivalent
- Revitalizant gel for compressors and bearingsCompressors · bearings · spindles
- Revitalizant gel for petrol enginesPetrol engines
- Revitalizant gel for cylinder restorationEngine cylinders, deep wear
How such units are treated:
About this result:
Limits of this report: The results relate to the equipment of Razdanskaya TES CJSC — the ORU-220 kV piston compressor, the bearings of the turning gear motor of power unit No. 2 and the GAZ-31 petrol engine; on other machines and duties the figures may differ. The treatment was performed by Armen-XADO, whose representatives were members of the commission.