Patent ID: 8128525
Filing Date: 2012-03-06
Classification: F03D,F16H,Y02E

Abstract:
1. An epicyclic gearbox for a wind power installation, comprising: a gearbox housing; a first planet stage revolving in the gearbox housing and having a planet support connected to a rotor of the wind power installation and having two side pieces, which are connected to one another by webs, and a plurality of planet gears having shafts and borne in the planet support through intervention of planet gear bearings, said planet gears engaging a central sun gear shaft and a hollow gear which is firmly connected to the gearbox housing; an oil circulation system having an oil supply connected with an oil feed pump and constructed to extend through a wall of the gearbox housing, a first oil-carrying channel having one end connected to the oil inlet, and second oil-carrying channels constructed to extend through one of the side pieces of the planet support and connecting another end of the first oil-carrying channels to third and fourth oil-carrying channels of the oil circulation system which pass through the shafts of all the first planet gears and are open to the planet gear bearings of the first planet stage; a second planet stage including a second planet support, second planet gears borne in the second planet support though intervention of second planet gear bearings, and a second sun gear shaft, wherein the oil circulation system includes fifth oil-carrying channels which pass through the second planet support; and an insertion apparatus arranged firmly in the gearbox housing and including a radial stator with an axial bush which is arranged radially between the first planet support and the second planet support, wherein the first oil-carrying channel passes through the insertion apparatus, wherein the second oil-carrying channels extend within the one side piece of the first planet support from a first annular groove, which is formed in a radial end surface of the side piece and in the axial bush of the insertion apparatus, to a second annular groove at a contact surface between the first planet support and the shafts of the first planet gears, with the second annular groove being connected to the third and fourth oil-carrying channels within the shafts of all the first planet gears, wherein a third annular groove is formed in the axial bush and in a radial end surface of the second planet support, and wherein the fifth oil-carrying channels end in a fourth annular groove which is formed in a radial end surface of planet shafts of the second planet gears and connected to sixth and seventh oil-carrying channels which pass through the planet shafts of the second planet gears and are open toward the second planet gear bearings.