ENERGY-SAVING DOUBLE-BEARING VERTICAL GRINDER FOR DRY GRINDING AND SHAPING

An energy-saving double-bearing vertical grinding mill for dry grinding and shaping comprising a shell arranged vertically, a permanent magnet variable frequency motor arranged above the shell, a rotating shaft connected with the output end of the permanent magnet variable frequency motor and a double-spiral rotor arranged on the rotating shaft. A grinding chamber is formed in the shell. An upper bearing and a lower bearing are respectively arranged at the top and the bottom of the grinding chamber. The upper bearing and the lower bearing are both sleeved on the rotating shaft and are respectively located at the upper end and the lower end of the rotating shaft. Therefore, the vibration and of the double-spiral rotor is reduced and the manufacturing requirement is lowered. The rotating speed of the double-spiral rotor is increased such that the grinding efficiency is improved. A grinding medium is filled in the grinding chamber, and the upper end/upper end surface of the side wall of the shell is provided with a feeding port and a dust collecting port in communication with the interior of the grinding chamber. At least two discharging ports in communication with the interior of the grinding chamber are arranged on the lower end/the lower end surface of the side wall of the shell, and the lower end surface of the shell is arranged in an air blowing port in communication with the interior of the grinding chamber.