| 摘要 |
A lubrication system (1) for a gear system (2) of a wind turbine is disclosed. The lubrication system (1) comprises a first reservoir (3) and a second reservoir (4) adapted to contain lubricant. It further comprises pump means (5, 15, 18) arranged to supply lubricant from the first reservoir (3) to the second reservoir (4) during normal operation, and a distribution system (8) fluidly connected between the first reservoir (3) and the gear system (2) in such a manner that lubricant can be supplied to the gear system (2) from the first reservoir (3) via the distribution system (8) during normal operation. The lubrication system (1) further comprises valve means (10, 12, 23) being shiftable between a first position and a second position. In the first position a flow of lubricant from the second reservoir (4) towards the gear system (2) or the first reservoir (3) is prevented, and in the second position it is allowed. The valve means (10, 12, 23) operates in response to pressure changes in the lubrication system (1) in such a manner that a predetermined pressure change automatically and directly causes the valve means (10, 12, 23) to shift from the first position to the second position. Thereby it is ensured that the lubrication system (1) is automatically, reliably and fast switched to an emergency state in the case that a situation occurs which changes the pressure in the lubrication system (1) in a predetermined manner. It is not necessary to rely on separate measurements of various parameters by independent probes or the like. |
