| 摘要 |
<p>An apparatus (10) for refining fibrous materials such as stock suspensions for papermaking which includes a housing (11), an inlet and outlet in said housing for receiving and discharging the treated materials, a shaft (12) rotatable in said housing, a plurality of rotating refiner disks (30 to 35) spaced along the shaft (12) and an additional plurality of refiner disks (41, 42, 51, 52) interspersed with the rotor disks (30 to 35) and providing therewith refining gaps (43, 44, 55, 56) through which the stock suspension passes. The other refiner disks (41,42,51,52) can be either stationary or counterrotating with respect to the rotor disks. The two sets of refiner disks are supported by means of axially flexible membranes (24, 25, 26, 46, 54). The present invention provides refiner disks (30 to 35, 41, 42, 51, 52) which have undercut portions in the surfaces adjacent to the flexible annular membranes (24, 25, 26, 46, 54) to increase the axial flexibility of the membranes.</p> |
