Hot jacket clamping device for main bearing of wind turbine generator

The invention discloses a wind turbine generator main bearing hot jacket clamping device which comprises a supporting disc and a plurality of clamping mechanisms, the supporting disc is used for being fixed to the side, close to a main bearing, of a main shaft flange, the multiple clamping mechanisms are used for being arranged on the supporting disc in the circumferential direction of the main bearing, and each clamping mechanism comprises a supporting base used for being fixed to the supporting disc; the supporting shaft is rotatably inserted into the supporting seat and partially upwards extends out of the supporting seat; and the clamping assembly comprises a bidirectional driving component and two clamping arms, the two clamping arms are symmetrically arranged, the middles of the two clamping arms are hinged to the extending part of the supporting shaft and are spaced by a preset distance, one side parts of the two clamping arms are connected through the bidirectional driving component, and the bidirecti