Patent ID: 8997934
Filing Date: 2015-04-07
Classification: F03D,F16H,Y02E

Abstract:
1. A lubrication system for a gear system for a wind turbine, the lubrication system comprising: a reservoir adapted to contain lubricant so as to define a gas space within the reservoir above the lubricant, a first pump arranged to supply lubricant from the reservoir to the gear system via a first fluid connection, a venting connection arranged between the reservoir and the gear system, the venting connection configured to transfer gas between the gas space of the reservoir and the gear system, and a vacuum generator arranged in fluid connection with the gas space of the reservoir and operable in a first operation state of the lubrication system to transfer gas from the gas space to the gear system through the venting connection, thereby maintaining a total gas pressure in the reservoir which is lower than an ambient pressure, wherein the vacuum generator is arranged to stop during a second operation state of the lubrication system.