Patent ID: 11913432

Abstract:
Disclosed is a method for dismantling a wind turbine gearbox (15) from a main shaft (7) in the nacelle (3) of a wind turbine (1), wherein a first end (11) of the main shaft (7) is connected to the gearbox (15) in a connection cavity (22) of the gearbox (15) and a second end (12) of the main shaft (7) is connected to a rotor (4) of the wind turbine (1). The method comprises the steps of: —arranging a hydraulic connection plug (13) in a centre channel (14) of a second end (37) of a gearbox shaft (21) of the gearbox (15), wherein a first end (20) of the gearbox shaft (21) is arranged at the connection cavity (22) on a first side (23) of the gearbox (15) and wherein the second end (37) of the gearbox shaft (21) is arranged at a second side (24) of the gearbox (15) opposite the first side (23), —securing the hydraulic connection plug (13) and the gearbox shaft (21) against axial displacement in a direction towards the second side (24) of the gearbox (15), —connecting a hydraulic pump (25) to the hydraulic connection plug (13), and —pumping liquid into the connection cavity (22) by means of the hydraulic pump (25) to force the main shaft (7) out of the connection cavity (22). Furthermore, use of the method is disclosed.