Energy-saving double-bearing vertical grinding mill for dry grinding and shaping

An energy-saving double-bearing vertical grinding mill for dry grinding and shaping, comprising:

• a shell,
• a permanent magnet variable frequency motor arranged above the shell,
• a rotating shaft connected with an output end of the permanent magnet variable frequency motor, and
• a double-spiral rotor arranged on the rotating shaft, wherein a grinding chamber is formed in the shell, wherein an upper bearing and a lower bearing are respectively arranged at top and bottom of the grinding chamber, wherein the upper bearing and the lower bearing are both sleeved on the rotating shaft and are respectively located at upper end and lower end of the rotating shaft, wherein the upper bearing and the lower bearing are both rotatably connected with the rotating shaft, wherein the grinding chamber is filled with a grinding medium, and wherein an upper end-of a side wall of the shell is provided with a feeding port and a dust collecting port in communication with an interior of the grinding chamber, and wherein at least two discharging ports in communication with the interior of the grinding chamber are arranged on a lower end of the side wall of the shell, and a lower end surface of the shell is arranged in an air blowing port in communication with the interior of the grinding chamber;
• wherein the upper bearing and the lower bearing are respectively provided with a sealing structure;
• wherein the dust collecting port is connected to a dust collector, and wherein a sieving plate is arranged in the position where the air blowing port and the shell are connected, the sieving plate is provided with a plurality of ventilation openings communicated with the interior of the grinding chamber, and the air blowing port is connected to an air blowing device.