It is because the air filter is clogged, causing excessive pressure in the box.
1. Completely drain the lubricating oil inside the gear box.
2. Remove the original electric heater and clean the original glue layer.
3. Check the cause of oil leakage. If the sealing surface is uneven, there are burrs, rotten screw holes, partial leakage of sealant, etc.
Two forms of lubrication for wind turbine gearboxes: splash lubrication and forced lubrication. Splash lubrication gear oil is used in large quantities. The NTK300 box uses 215 liters of oil. The gearbox has low power and the inner wall of the box is There is an oil return groove to lubricate the bearings.
220-320# heavy-duty industrial gear oil is commonly used in wind power gearboxes. Because the load and impact of wind power generation equipment are relatively large, the quality requirements for oil are relatively high. An example (not a recommendation) is Shell Omala S4 GX 320 Heavy Duty Industrial Gear Oil.