Automatic flat-bulb propellant screening device

The invention discloses an automatic flat-bulb propellant screening device which comprises a hydraulic motor, a flexible connector, a connecting shaft, an eccentric block, a connecting spring, a lower-layer process screen, an upper-layer process screen, a lower-layer fixed screen, an upper-layer fixed screen, a static electricity conducting bouncing ball, a static electricity conducting movable rubber ring, an annular flow guide check ring and a hydraulic station. Centrifugal force generated by rotation of the eccentric blocks drives the connecting springs to deform, so that the lower-layer process screen, the lower-layer fixed screen, the upper-layer process screen and the upper-layer fixed screen are driven to vibrate, and materials are screened; materials with too large particle sizes are screened out by the upper-layer process screen, materials with too small particle sizes are screened out by the lower-layer process screen, annular flow guide check rings are fixed to the upper-layer ...