Rotor element and a rotor for a screening apparatus
AssigneeAikawa Fiber Technologies Oy
InventorMathieu Hamelin
Life of this patent
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Abstract
The present invention relates to a turbulence element for use with a rotor and a rotor featuring turbulence elements. The rotor is used in a screening apparatus of the pulp and paper industry. The turbulence element has a longitudinal centerline (CL); two longitudinal edges, a leading edge and a trailing edge; two opposite ends, a first end and a second end; and two surfaces, a top surface and a bottom surface arranged between the leading edge and the trailing edge. The top surface is divided into a leading surface having its origin at the leading edge, and a trailing surface having its origin at the trailing edge. The leading edge and the leading surface are provided with undulations (U).
Claims25
A screening apparatus for screening a pulp fiber suspension, the screening apparatus comprising:
- a screen cylinder;
- and
- a rotor rotatable relative to the screen cylinder, the rotor comprising rotor elements thereon facing the screen cylinder, at least one of the rotor elements comprising:
- a centerline (CL);
- a length (L) in a direction of an axis of the rotor;
- a leading edge and a trailing edge;
- two opposite ends, a first end and a second end;
- and
- a top surface facing the screen cylinder between the leading edge and the trailing edge, the top surface divided into a leading surface extending from the leading edge and a trailing surface extending from the trailing edge, the leading and trailing surfaces meeting at a peak, wherein the leading surface comprises undulations (U) configured to contact a fiber suspension and facilitate weakening and releasing a blockage in the screen cylinder.
A rotor element for a screen cylinder for screening a pulp fiber suspension comprising:
- a centerline CL;
- a length (L);
- two edges comprising a first edge and a second edge;
- two opposite ends comprising a first end and a second end;
- and a top surface between the first edge and the second edge;
- the top surface divided into a first surface having an origin at the first edge, and a second surface having an origin at the second edge, the first and second surfaces meeting at a peak, and the first surface having a circumferential length between the first edge and the peak-line, and the first surface having undulations (U) configured to contact the pulp fiber suspension and facilitate weakening and releasing of a blockage in the screen cylinder.
A rotor element for a screen cylinder for screening a pulp fiber suspension comprising:
- a centerline CL;
- a length (L);
- two edges comprising a first edge and a second edge;
- two opposite ends comprising a first end and a second end;
- and a top surface between the first edge, the second edge, the first end and the second end;
- the top surface divided into a leading portion having an origin at the first edge, and a trailing portion having an origin at the second edge, the leading portion and trailing portion meeting at a peak;
- and the leading portion of the top surface having undulations (U) configured to contact the pulp fiber suspension and facilitate prevention of blockages in the screen cylinder.
Dependencies are inferred from the claim text.