IE B022LIFT GEARBOX TREATMENT REPORT · “EVPATORIA” RESORT COMPLEX, 2005–2006
RGL-225-45 lift gearbox: vibration down, worn pair replacement cancelled
Drive current decreased, phase imbalance disappeared, replacement of the worn gearbox was cancelled. 13.0 % — current drawn by the drive at high speed, 51.8 → 45.0 A; 4.4 % — current drawn by the drive at low speed, 89.0 → 85.1 A (2005).
of the gearbox treatmenttwo signatures, two seals
Key results
| EQUIPMENT | CONDITION AT THE START OF WORK | WHAT WAS MEASURED |
|---|---|---|
| Passenger lift<br/>“Evpatoria” resort complex, 17 storeys | Worm pair of the gearbox — wear limit reached, by the condition of the unit the gearbox was due for replacement; elevated vibration of the car and the gearbox | Current drawn by the drive motor on phases A, B, C in two car travel modes |
Current drawn by the drive — high speed mode
| PHASE | BEFORE TREATMENT | AFTER 15 MONTHS | CHANGE |
|---|---|---|---|
| Phase A | 17.6 A | 15.0 A | -14.8 % |
| Phase B | 18.2 A | 15.0 A | -17.6 % |
| Phase C | 16.0 A | 15.0 A | -6.3 % |
| Three phases combined | 51.8 A | 45.0 A | -13.0 % |
After the treatment all three phases converged to 15.0 A: the current imbalance typical of a worn worm pair disappeared.
Current drawn by the drive — low speed mode
| PHASE | BEFORE TREATMENT | AFTER 15 MONTHS | CHANGE |
|---|---|---|---|
| Phase A | 29.5 A | 29.5 A | no change |
| Phase B | 29.4 A | 27.4 A | -6.8 % |
| Phase C | 30.1 A | 28.2 A | -6.3 % |
| Three phases combined | 89.0 A | 85.1 A | -4.4 % |
Low speed is the standard mode for precise stopping of the car at a floor.
Unit condition: before treatment and after 15 months of service
| WHAT WAS ASSESSED | BEFORE TREATMENT | AFTER 15 MONTHS OF SERVICE |
|---|---|---|
| Worm pair | Wear limit reached, the gearbox was due for replacement | A visible layer of metal-ceramic coating formed on the worn surfaces; the question of replacing the gearbox was dropped |
| Vibration of the gearbox and the car | Elevated, when travelling from the 1st to the 17th floor | Practically disappeared |
The condition of the worm pair, the vibration and the noise were assessed during inspection of the unit.
Conclusion of the report
The report states: “upon completion of the treatment process using XADO revitalizants the vibration of the gearbox and of the lift car practically disappeared. The noise level decreased. A visible layer of metal-ceramic coating formed on the worn surfaces of the worm pair. The question of replacing the gearbox was dropped”. The saving of electricity amounted to 13.0 % in the high speed mode and 4.4 % in the low speed mode.
Current equivalent
- Revitalizant gel for gearboxesGearboxes · transmissions · gear drives
- Revitalizant gel for compressors and bearingsCompressors · bearings · spindles
How such units are treated:
About this result:
Limits of this report: The results relate to the RGL-225-45 worm gearbox of a passenger lift drive and to the stated operating modes; on other units and in other modes the figures may differ. The report was drawn up by Rigonda private company, which performed the treatment; the measurement results are confirmed by the signature and stamp of the chief engineer of the organisation operating the lift.