IE A038PILOT TREATMENT REPORT, MARCH — APRIL 2008
PND 100/250 metering pump: vibration and current fell without opening the gearbox
Drive current draw decreased, gearbox vibration along the X and Y axes fell. 8.6 % — current drawn by the electric drive, 3.5 → 3.2 A (2008).
with signatures and stamp
Key result
| EQUIPMENT | OPERATING CONDITIONS | WHAT WAS MEASURED |
|---|---|---|
| PND 100/250 metering pump | Boiler shop, boiler unit No. 9, phosphate pump | Gearbox vibration at three control points along the X, Y and Z axes |
| Metering pump gearbox | Worm gear in an oil bath, 650 h of operation after treatment | Current drawn by the integrated electric drive on all three phases |
Gearbox vibration level — three control points, 650 hours of operation
| CONTROL POINT | AXIS | AMPLITUDE, µm | VIBRATION VELOCITY, mm/s |
|---|---|---|---|
| Gearbox flange | X | 22 → 19 | 1.6 → 1.1 |
| Gearbox flange | Y | 60 → 50 | 2.5 → 1.8 |
| Gearbox flange | Z | 18 → 12 | 0.9 → 1.1 |
| Blind cover, worm wheel side | X | 39 → 23 | 1.6 → 1.3 |
| Blind cover, worm wheel side | Y | 28 → 20 | 1.3 → 0.8 |
| Blind cover, worm wheel side | Z | 20 → 20 | 1.4 → 1.4 |
| Cover, eccentric side | X | 24 → 20 | 1.6 → 1.4 |
| Cover, eccentric side | Y | 29 → 22 | 1.5 → 1.4 |
| Cover, eccentric side | Z | 12 → 12 | 0.8 → 1.1 |
According to the conclusions of the report, vibration along the X and Y axes decreased by 14–41 % in amplitude and by 12–38 % in vibration velocity. The Z axis runs along the axis of the worm and the worm wheel.
Current drawn by the integrated electric drive
| PHASE | 13.03.2008, before treatment | 09.04.2008, 650 h of operation | CHANGE |
|---|---|---|---|
| Phase 1 | 3.5 A | 3.2 A | −0.3 A |
| Phase 2 | 3.5 A | 3.2 A | −0.3 A |
| Phase 3 | 3.4 A | 3.2 A | −0.2 A |
The decrease was recorded on all three phases of the drive; according to the conclusions of the report, the current drawn fell by 8 %.
Conclusions of the Khabarovsk TETs-1 commission
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 refer to the gearbox of the PND 100/250 metering pump within boiler unit No. 9 of Khabarovsk TETs-1 after 650 hours of operation following a single treatment; on other equipment and under other operating modes the figures may differ.