Dry type vortex vacuum pump

The utility model provides a dry type vortex vacuum pump, and belongs to the technical field of pumps. The problem that an eccentric main shaft in an existing vortex vacuum pump is low in rotation stability is solved. The dry type vortex vacuum pump comprises a pump body assembly, a vortex air exhaust assembly and an eccentric main shaft, the vortex air exhaust assembly is installed on the pump body assembly, the eccentric main shaft is rotationally connected with the pump body assembly, and one end of the eccentric main shaft is connected with a movable vortex plate of the vortex air exhaust assembly; a motor rotor is fixed to the other end of the eccentric main shaft and sleeved with a motor stator, and the motor stator is fixedly connected with the pump body assembly. And the eccentric main shaft is also fixedly connected with a balance block. A balance block is arranged on the eccentric main shaft, so that inertia and shaking generated by translation of the movable scroll plate are effectively balanced; a