The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2014
Filed:
Jun. 02, 2009
Poul Torben Tietze, Brabrand, DK;
Thomas Korsgaard Nielsen, Randers, DK;
Poul Torben Tietze, Brabrand, DK;
Thomas Korsgaard Nielsen, Randers, DK;
Vestas Wind Systems, A/S, Aarhus N., DK;
Abstract
A lubrication system for a gear system of a wind turbine includes a first reservoir and a second reservoir adapted to contain lubricant. It further includes pump means arranged to supply lubricant from the first reservoir to the second reservoir during normal operation, and a distribution system fluidly connected between the first reservoir and the gear system in such a manner that lubricant can be supplied to the gear system from the first reservoir via the distribution system during normal operation. The lubrication system further comprises valve means being shiftable between a first position and a second position. In the first position a flow of lubricant from the second reservoir towards the gear system or the first reservoir is prevented, and in the second position it is allowed. The valve means operates in response to pressure changes in the lubrication system in such a manner that a predetermined pressure change automatically and directly causes the valve means to shift from the first position to the second position. Thereby it is ensured that the lubrication system is automatically, reliably and quickly switched to an emergency state in the case that a situation occurs which changes the pressure in the lubrication system in a predetermined manner. It is not necessary to rely on separate measurements of various parameters by independent probes or the like.