Turbomolecular pump
The smallest machine among those analyzed: a 60 ml bath, a 0.05 ml dose. The oil is drawn off with a syringe and replaced by the mixture — topping up into such a volume is not possible.
Rotary-type turbomolecular pump: 60 ml oil bath, rotor at 30 000 rpm
The class standard is 1.2 ml per litre. The same norm applies here (1 ml/l of gel for power steering), but recalculated for a micro-volume: 0.05 ml per stage. Rolling bearings, oil-lubricated →
What is treated
- A serviceable pump with no parts showing critical wear.
- The oil filter has been cleaned or replaced.
- The oil is TM-1, linseed-based, vegetable.
What is measured before and after
| Parameter | Instrument | How and when |
|---|---|---|
| Vibration level of the bearing supports | vibrometer | In the vertical, horizontal and axial directions, before the start and after the end of the cycle. |
| Noise level of the bearing supports | sound level meter | Where possible. |
| Operating temperature of the bearing assemblies | thermometer | Monitored throughout the entire treatment. |
Dosage rates
| Compound | Rate | How and when |
|---|---|---|
| Power steering gel | 1 ml per 1 litre of the standard oil — that is, 0.05 ml per stage | Heat 10 ml of TM-1 oil to 50–60 °C and dissolve 0.05 ml of the gel in it; draw 10 ml of oil out of the system with a syringe and introduce 10 ml of the mixture. |
Treatment stages
- Draw off 10 ml of oil with a syringe fitted with a flexible tube and introduce 10 ml of the mixture in its place.Start of the running-time count
- The second stage is the same as the first.After 8 hours of total running time
- The third stage is the same as the first.8 hours later
After treatment
- The full cycle is no less than 100 hours of running time from the first stage.
- Vibration and noise are measured at the same points as before the treatment.
Points to watch
- After the treatment is introduced and the rotor reaches full speed, the bearing temperature may rise — it is monitored and the cooling is adjusted.
- By 50 hours of running time the temperature must drop and stabilize; if it does not, the treatment is discontinued.
- Load schedule for the first stage: no more than 25 % of maximum, after one hour — 50 %, two hours later — rated load.
Source: XADO applied procedure, lead engineer I. N. Sharaikin. Class standard — instruction IE-24.6-25612000-005-2008, procedure No. 9.