Rotary feeder without gas leakage

The utility model provides a rotary feeder without gas leakage, which effectively prevents gas leakage, material returning and dust raising, prevents materials from entering a bearing, and prolongs the service life of the bearing. A feeding port is formed in the upper portion of the shell, a discharging port is formed in the lower portion of the shell, the end covers are fixed to the two sides of the shell, the transmission shaft is rotationally arranged on the end covers through bearings, a rotor is connected to the transmission shaft, and valve plates arranged along the circumference are arranged on the peripheral face of the rotor. A straight brush in contact with the inner cavity of the shell is mounted on the outer side surface, far away from the rotor axis, of the valve plate; end plates are arranged on the two sides of the rotor, and round brushes making contact with the inner cavity of the shell are arranged on the peripheries of the end plates. 本实用新型提供一种无气体泄漏的旋转供料器，它有效的防止了气体泄漏、返料和扬尘，并防止物料进入轴承，延长轴承的使用