Leakage-free rotary feeder with valve plate abrasion self-compensation function

The invention provides a valve plate abrasion self-compensating rotary feeder which can always keep the outer side face of a valve plate attached to an inner cavity of a shell when the outer side face of the valve plate is abraded, and the self-compensating effect and the sealing effect are achieved. Meanwhile, materials can be effectively prevented from entering the bearing from the side face, the working environment of the bearing is guaranteed, and the service life of the bearing is prolonged. The device comprises a shell, a feeding port, a discharging port, a transmission shaft, a rotor and bearing pedestals, the bearing pedestals are fixed to the two sides of the shell, the transmission shaft is rotationally arranged on the bearing pedestals, the rotor is connected to the transmission shaft, and a plurality of valve plates moving relative to the rotor in the radial direction of the rotor are installed on the rotor. A valve plate compensation spring used for pushing the valve plate to move away from the a