The rotator pump is also called as colloid pump, trefoil pump, sole pump etc. During the rotation of the two rotors(gear number is 2-4)which make synchronous reverse rotation, the rotor pump produces(vacuum degree)suction at the inlet, so as to suck the materials to be transported. The two rotors separate the rotor chamber into several small spaces and rotate according to the sequence of a-b-c-d. When rotating to position a, only chamber I is filled with media; when reaching position b, chamber B also includes some media; when reaching position c, chamber A is also filled with media; when reaching position d, chambers A, B and l will connect with each other and the media will be transported to the discharging vent. The media (materials) will be continuously transported by repeating the above operation.