Patent ID: 8178988
Filing Date: 2012-05-15
Classification: F03D,F05B,F16C,Y02E

Abstract:
1. A direct-drive wind turbine generator, comprising: a main shaft having one end connected to a rotor head of a wind turbine rotor; a generator having a stator, a stator casing for supporting said stator, and a rotor connected to the other end of said main shaft; first and second bearings positioned between said rotor head and said generator to rotatably support said main shaft; and a torque support for supporting said stator casing, wherein said second bearing is positioned closer to said generator than said first bearing and said second bearing includes wherein a distance between said second outer ring and said second inner ring is variable, and wherein said biasing member biases said second outer ring so that an inner face of said second outer ring comes close to an outer face of said second inner ring, wherein said first bearing is a bearing with an aligning capability, and wherein said second bearing is a bearing with no aligning capability.