| 摘要 |
<p>A crushing roller for a vertical-type roller mill capable of effectively and efficiently preventing a vibration from occurring due to various factors of the vertical-type roller mill in a coal fired power plant. In the crushing roller (10) used in a vertical roller mill, a plurality of screw grooves (11) which are arranged at predetermined intervals in the circumferential direction and are continuous with each other in the circumferential direction, and which are tilted relative to the rotation center axis are formed in the outer peripheral surface of the roller. The plurality of screw grooves (11) are formed over the half circumference or longer in the direction along which the crushed raw material introduced from the center part of the mill onto a rotary table is pushed back to the center part when the roller is rotated. The tilt angle (?) of each screw groove (11) to the center axis of the roller is 55-85°.</p> |
