Main machine of fluffer

The invention discloses a main machine of a fluffer, and relates to the technical field of fluffers. The defibering device comprises a supporting mechanism, a defibering barrel is fixedly mounted at the top end of the supporting mechanism, and a defibering mechanism is arranged in an inner cavity of the defibering barrel; through the arrangement and use of the defibering mechanism, a first defibering rod and a second defibering rod can coaxially and reversely rotate, so that papermaking pulp in the defibering barrel can be subjected to bidirectional rotary stirring, the papermaking pulp can be subjected to bidirectional defibering, and the defibering effect of the papermaking pulp is effectively improved; papermaking pulp flowing into the bottom end of the L-shaped backflow pipe can be spirally conveyed upwards along the inner cavity of the L-shaped backflow pipe, so that the spirally conveyed papermaking pulp can be guided into the upper end of the inner cavity of the defibering barrel again through the back