IE B013INDUSTRIAL APPLICATION REPORT · 2012–2013
Fan DN-17: lower power draw and bearing vibration
The drive began drawing less current and power, vibration of the bearing supports fell. 4.7 % — motor power draw, 110–118 → 106–114 kW; 5.1–8.4 % — motor current draw, 200–214 → 190–202 A; 46–56 % — vibration velocity at the test points, 4.08–8.67 → 1.88–4.43 mm/s (2013).
with the participation of XADO LLC
Key results
| EQUIPMENT | DUTY AND OPERATING TIME | WHAT WAS MEASURED |
|---|---|---|
| Induced-draught fan DN-17 No. 1, foundry shop — drive in service | 1500 rpm, damper closed; 360 h of operation after the full treatment cycle | Motor current and power draw, apparent power (kVA) |
| Fan bearing assemblies — front and rear | Treatment cycle 19.07.2012 – 30.05.2013, final measurements 02.08.2013 | Vibration at 10 test points: bearing supports and casing base |
Electrical parameters of the drive — same duty before and after treatment
| PARAMETER | BEFORE | AFTER | CHANGE | INSTRUMENT |
|---|---|---|---|---|
| Motor current draw | 200–214 A | 192–202 A | 5.1 % | ATK2200 clamp meter |
| Motor current draw | 208–209 A | 190–192 A | 8.4 % | SMZ/KMB Systems |
| Power draw | 110–118 kW | 106–114 kW | 4.7 % | ATK2200 clamp meter |
| Apparent power (kVA) | 45.0–46.7 | 41.7–43.0 | 7.6 % | SMZ/KMB Systems |
Two independent measurement channels — an ATK2200 clamp meter and an SMZ/KMB Systems panel meter — took readings under the same duty: 1500 rpm, damper closed.
Vibration of the bearing supports and casing base — 10 test points
| MEASUREMENT POINT | VIBRATION VELOCITY, MM/S | VIBRATION ACCELERATION, M/S² | VIBRATION DISPLACEMENT, µM |
|---|---|---|---|
| Front bearing, vertical | 8.67 → 4.43 | 129 → 112 | 92.8 → 68.6 |
| Front bearing, horizontal | 6.75 → 2.94 | 155.3 → 117 | 69.8 → 45.7 |
| Front bearing, axial | 5.43 → 3.42 | 128.3 → 74.8 | 87.1 → 56.0 |
| Rear bearing, vertical | 5.92 → 2.9 | 96.1 → 84.7 | 40.0 → 15.9 |
| Rear bearing, horizontal | 5.7 → 3.09 | 101.7 → 96.2 | 63.9 → 40.9 |
| Rear bearing, axial | 5.77 → 3.2 | 99.6 → 80.5 | 85.2 → 44.6 |
| Casing base, front — horizontal | 5.57 → 2.08 | 184.0 → 55.2 | 42.8 → 31.9 |
| Casing base, front — axial | 4.08 → 1.88 | 102.3 → 66.0 | 53.5 → 16.8 |
| Casing base, rear — horizontal | 4.1 → 1.99 | 123.3 → 60.0 | 44.9 → 34.4 |
| Casing base, rear — axial | 4.89 → 1.95 | 95.2 → 82.3 | 49.9 → 24.6 |
SENDIG 911 vibrometer, measurement with the damper closed. A reduction was recorded at all ten points and for all three vibration quantities.
Commission conclusions
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:
Limits of this report: The results apply to induced-draught fan DN-17 No. 1 of the foundry shop of PJSC KhMZ Svet Shakhtera and to the measurement duty with the damper closed, 1500 rpm; on other equipment and under other duties the figures may differ. The treatment was performed by XADO LLC specialists, who signed the report together with the plant commission.