In a vertical mill, a pulverization table is supported with a vertical rotation axis core in a housing so as to be capable of being driven and rotated, and a pulverization roller rotatable in conjunction with rotation of the pulverization table is disposed above the pulverization table so as to be opposed to the pulverization table, and a roller swing mechanism is provided so as to make the pulverization roller parallel to a surface of the pulverization table and swingable in a direction different from a direction of rotation of the pulverization table. Accordingly, a solid matter such as biomass can be efficiently pulverized, thereby achieving improvement in pulverization efficiency.
1. A vertical mill, comprising:
a housing;
a vertical rotation axis core;
a pulverization table supported by the vertical rotation axis core in the housing so as to be driven and rotated;
a pulverization roller disposed above the pulverization table so as to be opposed to the pulverization table and being rotatable in conjunction with rotation of the pulverization table;
a roller swing mechanism causing the pulverization roller to be parallel to a surface of the pulverization table and swingable in a direction different from a direction of rotation of the pulverization table;
a support shaft having a base end part supported by the housing and a leading end part facing a rotation axis core of the pulverization table; and
a swing shaft having a leading end part and a base end part that is swingable connected to the leading end part of the support shaft via a connecting shaft inclined with respect to a horizontal plane,
wherein the pulverization roller is rotatably supported at the leading end part of the swing shaft.
2. The vertical mill according to claim 1 , wherein
the roller swing mechanism is configured to cause the pulverization roller to swing around a pulverization position of the pulverization roller on the pulverization table or a position nearer a radial outside of the pulverization table other than the pulverization position, as a fulcrum point.
3. The vertical mill according to claim 1 , wherein the roller swing mechanism includes an actuator configured to cause the pulverization roller to swing.
4. The vertical mill according to claim 1 , wherein the roller swing mechanism includes a biasing member configured to bias the pulverization roller to an upstream side of a direction of rotation of the pulverization table.
5. The vertical mill according to claim 1 , wherein the roller swing mechanism includes hydraulic cylinders disposed on horizontal sides of the support shaft and the swing shaft.
6. The vertical mill according to claim 5 , wherein the hydraulic cylinders are configured to be capable of alternately extending and contracting so as to enable the pulverization roller to swing on the pulverization table.
7. The vertical mill according to claim 1 , wherein the swing shaft, the support shaft and the connecting shaft are configured and arranged to enable three dimensional movement of the pulverization roller.
8. The vertical mill according to claim 1 , wherein the swing shaft and the support shaft are connected by the connecting shaft so as to enable horizontal movement.