| 摘要 |
The invention relates to a refiner for refining of material such as wood chips or the like, which comprises: a first and a second opposed and with respect to each other rotatable rotors (11, 12), which are provided with refining elements (15, 16) and which between themselves define a refiner gap with a refining zone (17) for processing of the material, wherein the first rotor (11) comprises openings (19) having an inlet side and an outlet side (19a, 19b) intended to let the material through, and wherein the outlet side is adjacent to the feeding zone (18) of the refiner gap; a feeding chamber (22) to which the material is arranged to be fed, and which is adjacent to the inlet side of the openings (19) of the rotor; a coaxial feeder (23) having a screw body (24) and helix shaped threads (25), which coaxial feeder (23) is arranged inside the feeding chamber (22) in order to rotate together with the first rotor (11) and to carry the material towards the openings (19) of the rotor. The threads (25) of the coaxial feeder (23) comprise an essentially straight part (25a) that extends essentially perpendicular from the screw body (24) and that in operation is intended to carry the material in the longitudinal direction towards the refiner gap, wherein the straight part (25a) passes into a top (25b) that is intended to limit the motion of the material radially. |
