Patent ID: 8939258
Filing Date: 2015-01-27
Classification: F03D,F05B,Y02E,Y02P

Abstract:
1. A wind turbine generator for the generation of electrical power through incident air flow on a rotor rotating around a rotor axis with multiple rotor blades being coupled via a rotor shaft to a generator, comprising: a main gear box comprising a drive shaft rotationally coupled to the rotor shaft, an output shaft rotationally coupled to a generator input shaft, and an intermediate shaft, wherein the main gear box is configured to translate a rotation speed of the rotor shaft to a rotation speed of the generator input shaft and a rotation speed of the intermediate shaft; a lubrication pump configured to feed lubricant to components that are subject to wear and tear during normal operation of the wind turbine generator; an emergency lubrication pump comprising an input shaft and configured to feed lubricant to the components that are subject to wear and tear, and a coupling unit having an input shaft coupled to the intermediate shaft of the main gear box and an output shaft coupled to the emergency lubrication pump wherein the emergency lubrication pump is deactivated by the coupling unit under normal operation of the wind turbine generator and is activated by the coupling unit upon deactivation of the lubrication pump by selectively decoupling and coupling, respectively, the input and output shafts of the coupling unit and wherein the rotation speed of the intermediate shaft is less than the rotation speed of the generator input shaft and greater than the rotation speed of the rotor shaft.