Lubrication
Oil contamination
Contaminated oil increases wear risk inside the gearbox. Particles can circulate through high‑load contact zones and accelerate surface damage. If the trend continues, it may reduce efficiency and contribute to lost wind energy.
Understanding the Problem
How does contamination influence gearbox behaviour?
When particles build up in the oil, they act as abrasive material in areas where clearances are small and loads are high. This can progress without obvious operational alarms, while wear develops in the background. The key is to regain oil cleanliness and keep contamination from returning.
Typical symptoms
Increasing particle levels in oil analysis
Sampling trends show contamination rising compared to baseline.
Oil cleanliness outside the expected range
Cleanliness classification shifts over time.
Faster filter loading than normal
Filters clog sooner or require more frequent changes.
Sediment or visible residue in samples
Particles appear as haze, sediment, or debris during inspection.
Wear indicators begin to increase
Wear metals rise alongside contamination trends.
Recurring contamination after service actions
Particle levels return quickly, indicating a persistent source or incomplete removal.
Solution
Filtration
Filtration reduces the circulating particle load and helps restore oil cleanliness during operation. The filtration principle relies on depth capture, where fine particles are retained throughout the filter medium rather than only on the surface. A cellulose‑based insert is particularly effective at trapping fine solids while keeping stable flow characteristics. The intent is sustained oil cleanliness and lower abrasive stress inside the gearbox.
Solution
Particle surveillance
Particle surveillance creates visibility on contamination trends instead of relying only on periodic sampling. A particle counter measures cleanliness levels over time and highlights changes early. This helps identify whether contamination is building, stabilising, or returning after actions are taken. The goal is earlier decisions and fewer situations where contamination develops unnoticed.
