IE A002IN-SERVICE TRIALS · 18.05—29.07.2009
Screw compressors 05-K: support vibration reduced with no teardown, on all machines
Vibration of bearing units and supports dropped on all three compressors, machines were not opened up. 12–18 % — vibration level at the rotor bearing assemblies and the base supports (2009).
reports dated 29.07.2009
Key result
| COMPRESSOR | RUN TIME TO MEASUREMENT | WHAT WAS MEASURED | REPORT |
|---|---|---|---|
| 05-K-610 | 611 h | Vibration of supports and bearing assemblies, 6 points | 29.07.2009 |
| 05-K-620 No. 1 | 1084 h | Vibration of supports and bearing assemblies, 6 points | 29.07.2009 |
| 05-K-621 No. 2 | 1016 h | Vibration of supports and bearing assemblies, 6 points | 29.07.2009 |
Vibration velocity at the control points, mm/s — before and after treatment
| MEASUREMENT POINT | 05-K-610 | 05-K-620 No. 1 | 05-K-621 No. 2 |
|---|---|---|---|
| Front bearing of the driven rotor | 6.41–8.75 → 4.21–7.11 | 9.02–9.4 → 3.91–6.8 | 5.61–7.54 → 3.8–6.15 |
| Front bearing of the driving rotor | 5.39–7.75 → 4.23–6.93 | 7.48–12.29 → 4.58–9.74 | 6.64–6.74 → 3.77–5.23 |
| Rear bearing of the driven rotor | 8.28–9.45 → 3.2–5.05 | 8.48–9.14 → 3.85–7.5 | 9.77–11.4 → 5.23–6.83 |
| Rear bearing of the driving rotor | 7.88–11.32 → 3.27–5.94 | 7.96–11.42 → 4.29–9.93 | 6.55–16.4 → 3.65–5.8 |
| Base support, front | 9.35–34.5 → 6.67–18.9 | 10.1–13.91 → 3.77–7.66 | 9.49–11.4 → 4.9–6.65 |
| Base support, rear | 7.84–23.3 → 6.39–21.0 | 12.12–17.9 → 4.54–4.9 | 8.01–11.68 → 4.06–6.01 |
The commissions set the final reduction at 12–18 %: before treatment the compressors were measured at no load, after treatment under full working load.
Vibration displacement at the same points, µm — before and after treatment
| MEASUREMENT POINT | 05-K-610 | 05-K-620 No. 1 | 05-K-621 No. 2 |
|---|---|---|---|
| Front bearing of the driven rotor | 23.0–75.7 → 17.2–55.8 | 28.8–58.4 → 23.3–48.2 | 48.2–64.9 → 25.5–60.1 |
| Front bearing of the driving rotor | 32.1–41.7 → 24.8–38.7 | 27.2–92.9 → 19.8–33.7 | 45.8–54.3 → 33.6–35.4 |
| Rear bearing of the driven rotor | 44.9–76.0 → 21.7–40.0 | 40.9–74.6 → 18.3–46.2 | 48.4–96.3 → 35.4–51.0 |
| Rear bearing of the driving rotor | 42.7–54.5 → 41.5–45.1 | 51.5–64.0 → 25.0–49.4 | 48.4–93.1 → 42.2–71.7 |
| Base support, front | 55.0–132.0 → 50.2–111.0 | 51.8–58.0 → 39.1–55.1 | 43.2–86.4 → 31.4–51.4 |
| Base support, rear | 52.4–95.3 → 27.0–90.3 | 62.4–87.7 → 28.0–51.5 | 56.6–131.0 → 30.0–54.9 |
SENDIG 911 vibrometer; three measurement directions at each point, the cells give the spread across them.
Findings of the plant commissions
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 relate to the 05-K screw air compressors of the compressor station of Kharkiv Yeast Plant JSC; on other equipment and under different operating conditions the figures may differ.