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Time：2025-05-16 11:20:02 Reading volume：
The turbine oil (turbine oil) filtration system is a key component to ensure the stable operation of equipment such as steam turbines and gas turbines. Its core function is to maintain the cleanliness and performance of oil products through multi-stage purification methods, thereby protecting equipment and extending service life. The following is a detailed analysis of the role of the turbine oil filtration system:
1. Removal of particulate pollutants
- Target: Filter metal wear particles, dust, oxides, etc. (typical accuracy 1~5μm).
- Significance: Prevent scratches or wear of precision parts such as journals, bearings, gears, etc., and avoid increased vibration of equipment.
2. Separation of moisture (dehydration)
- Method: vacuum separation, coalescence demulsification, or centrifugal dehydration.
- Significance: Moisture will accelerate the oxidation of oil products, breed microorganisms, and cause the strength of the oil film to decrease (moisture content is required to be ≤ 100 ppm).
3. Removal of air and gas
- Method: vacuum degassing or ultrasonic treatment.
- Significance: Eliminate bubbles in the oil to prevent cavitation and poor lubrication (such as local high temperature of the bearing).
4. Inhibit oil aging
- Method: Filter acidic substances, colloids and oxidation products.
- Significance: Extend the oil change cycle (from 6 months to 2~3 years).
| Subsystem | Technical means | Effect |
|------------------|---------------------------|---------------------------------------|
| Coarse filter unit | Metal mesh/cyclone separation (≥25μm) | Intercept large particles and protect subsequent fine filter equipment |
| Fine filter unit | Glass fiber filter element/electrostatic adsorption (1~5μm) | Ensure that the oil reaches ISO 4406 14/12/10 level |
| Vacuum dehydration unit | Atomization + negative pressure evaporation | Water content reduced to ≤50ppm (ASTM D6304) |
| Online monitoring | Particle counter, moisture sensor | Real-time warning of excessive pollution to achieve predictive maintenance |
- Bearing life: Clean oil film can reduce the friction coefficient and extend the bearing life by more than 30%.
- Vibration control: Reduce dynamic imbalance caused by particles and control vibration values within the ISO 10816 standard.
- Seal protection: prevent impurities from wearing the shaft seal, and avoid oil leakage and steam entering the oil system.
1. High temperature environment
- ｓｅｌｅｃｔ high temperature resistant filter materials (such as stainless steel sintered filter elements) + an antioxidant additive replenishment system.
2. Seawater cooler leakage
- Add a coalescing separator to handle salt emulsified oil (need to detect chloride ion content ≤ 10 ppm).
3. Frequent start and stop
- Configure a circulating filtration system to keep the oil clean during shutdown.
- Energy saving: Clean oil reduces friction loss and saves 2%~5% of energy consumption.
- Maintenance cost: Reduce unplanned shutdowns caused by oil pollution (a single fault repair can save tens of thousands to millions of yuan).
- Oil consumption: The waste oil regeneration rate can reach 90%, reducing the cost of purchasing new oil.
- Power industry: vacuum oil filter (such as Pall ZFG series) is preferred, taking into account both dehydration and particle filtration.
- Marine turbines: explosion-proof centrifugal oil filter (such as Alfa Laval MOPX) is selected to adapt to high high-vibration environment.
- Aero-derivative gas turbine: NAS level 5 or below accuracy is required; an electrostatic oil filter (such as HYDAC EDS series) is recommended.
- Filter element replacement: ｒｅｐｌａｃｅ when the pressure difference is greater than 0.15MPa or the particle count exceeds the standard.
- Oil inspection frequency: monthly detection of moisture, acid value, and cleanliness (recommended to comply with ASTM D4378).
Through the scientific configuration of the filtration system, the turbine oil can be kept in a "like new" state for a long time, directly improving the reliability and economy of the unit. If a specific solution design is required, please provide the unit model and oil data!
