Anti jamming type: adopting anti jamming feeding design, adjusting gap design according to different media, and if necessary, using offset machine body, embedded rotor, V-shaped rotor with anti jamming and reducing crushing function. Multiple anti jamming device combinations, pressure resistance using closed rotor, widely used in suction and compression pneumatic conveying systems, effectively reducing air leakage and ensuring normal operation of pneumatic conveying. Temperature resistant type, adopting an external structure, keeping the operating part away from the box part in contact with the material, can make the bearing and oil seal system work normally without being affected by high temperature. This model is also particularly suitable for conveying metal powder and ultrafine powder, avoiding these materials from entering the bearing and oil seal system. Anti sticking type, adopting special design. Can transport easily sticky materials normally