BEARING WITH MINIMIZED LEAKAGE OF LUBRICANT

摘要

This invention relates to a bearing (10) of a wind turbine, wherein the bearing (10) is lubricated with a lubricant for reducing wear and fatigue of the bearing (10), the bearing (10) is sealed such that the amount of lubricant which is leaking out of the bearing (10) is minimized, and the bearing (10) comprises a ventilation device (20) with at least one pressure compensation hole (21) for enabling a pressure compensation between the sealed bearing (10) and the ambient. The ventilation device (20) further comprises a compressor unit (23), which is connected with the pressure compensation hole (21). Thus, a compressed medium can be selectively blown through the pressure compensation hole (21) to ensure that the pressure compensation hole (21) remains substantially unobstructed such that overpressure within the bearing (10) compared to the ambient is minimized and leakage of lubricant out of the bearing (10) is reduced. The invention also relates to a wind turbine comprising such a bearing (10) and to a method of reducing leakage of lubricant out of a bearing (10) of a wind turbine.