Dual temperature oil control system and method for a wind turbine gearbox

摘要

A system and method are provided for supplying oil at different temperatures to different locations within a wind turbine gearbox, wherein oil is pumped from a common oil sump to the different locations via a common header. The different gear box locations are divided into at least two groups, wherein each of said groups receives inlet oil at a respective inlet oil temperature. A first temperature control device is disposed between the common header and the first group, and a second temperature control device is disposed between the common header and the second group of gearbox locations.

主权项

1. A system for supplying oil at different temperatures to different locations within a wind turbine gearbox, comprising:
a common oil sump; a supply pump disposed to draw oil from said sump and deliver the oil to said different gearbox locations via a common header; said different gear box locations divided into at least two groups, wherein each of said groups receives inlet oil at a respective inlet oil temperature (T1 for first group and T2 for second group); a first temperature control device disposed between said common header and said first group; a second temperature control device disposed between said common header and said second group; wherein said first and second temperature control devices are configured to independently control the inlet oil temperature to said respective groups within said wind turbine gearbox an oil cooler disposed in said common header downstream of said supply pump, said first and second temperature control devices disposed downstream of said cooler and controlling a respective separate flow of oil from said cooler to the respective said first and second groups to independently control inlet oil temperatures T1 and T2; said first group of gearbox locations comprising components in a first high speed gear stage and said second group of gearbox locations comprising components in a second low speed gear stage of said wind turbine gearbox; and wherein said first temperature control device is configured to supply inlet oil to said first high speed gear stage at temperature T1 that is greater than temperature T2 of inlet oil supplied to said second low speed gear stage by said second temperature control device.