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US 11,141,735 B2Granted
Refiner plate with wave-like groove profile
AssigneeValmet Technologies Oy
InventorRyan A. Knight
Life of this patent
Estimating the term…
Abstract
A refiner plate segment including a plurality of bars and grooves for refining lignocellulosic materials, where the grooves between adjacent bars includes a plurality of teeth having a wave-like profile with alternating high and low points. The wave-like profile of the teeth within the grooves increases turbulence in the refining process to tumble the fibers and push them toward the refining gap to reduce energy and improve the efficiency of the fiber reduction process.
Claims15
An apparatus for refining fibrous material, the apparatus comprising:
- a plate segment having a refining zone disposed between an inner edge and an outer edge of the plate segment and between a first and opposing second peripheral edge, the refining zone including a plurality of bars and grooves arranged in an alternating configuration and extending in a generally radial direction along the plate segment from the inner edge toward the outer edge, wherein each groove is positioned between a first bar and a second bar, the first and second bars each having a side wall facing a corresponding groove, the side wall extending upwardly from a base surface of the groove;
- a plurality of teeth arranged within each groove, each tooth extending across the groove from the side wall of the first bar to the side wall of the second bar, each tooth having a ramp extending upwardly from the base surface of the groove toward a peak and a tail extending downwardly from the peak toward a valley, wherein the plurality of teeth within each groove together form a wave-like profile of at least three sets of alternating triangular peaks and triangular valleys to help impede the flow of fibrous material,
- wherein at least a first tooth in the plurality of teeth within at least one of the grooves includes a first slanted peak that is continuously sloped as it extends across the groove from the side wall of the first bar to the side wall of the second bar, the slanted peak having a first height adjacent the side wall of the first bar and a second height adjacent the side wall of the second bar, wherein the first height is different from the second height.
An apparatus for refining fibrous material, the apparatus comprising:
- a plate segment having a refining zone disposed between an inner edge and an outer edge of the plate segment and between a first and opposing second peripheral edge, the refining zone including a plurality of bars and grooves arranged in an alternating configuration and extending in a generally radial direction along the plate segment from the inner edge toward the outer edge, wherein each groove is positioned between a first bar and a second bar, the first and second bars each having a side wall facing a corresponding groove, the side wall extending upwardly from a base surface of the groove;
- a plurality of teeth arranged within each groove, each tooth extending across the groove from the side wall of the first bar to the side wall of the second bar, each tooth having a ramp extending upwardly from the base surface of the groove toward a peak and a tail extending downwardly from the peak toward a valley, wherein the plurality of teeth within each groove together form a wave-like profile of at least three sets of alternating triangular peaks and triangular valleys to help impede the flow of fibrous material,
- wherein each tooth within at least one the grooves includes a slanted peak that is continuously sloped as the peak extends across the groove from the side wall of the first bar to the side wall of the second bar, the teeth arranged such that the respective slanted peaks of each successive tooth alternates between an upward slope and a downward slope as the peak extends from the side wall of the first bar to the side wall of the second bar.
An apparatus for refining fibrous material, the apparatus comprising:
- a plate segment having a refining zone disposed between an inner edge and an outer edge of the plate segment and between a first and opposing second peripheral edge, the refining zone including a plurality of bars and grooves arranged in an alternating configuration and extending in a generally radial direction along the plate segment from the inner edge toward the outer edge, wherein each groove is positioned between a first bar and a second bar, the first and second bars each having a side wall facing a corresponding groove, the side wall extending upwardly from a base surface of the groove;
- a plurality of teeth arranged within each groove, each tooth extending across the groove from the side wall of the first bar to the side wall of the second bar, each tooth having a ramp extending upwardly from the base surface of the groove toward a peak and a tail extending downwardly from the peak toward a valley, wherein the plurality of teeth within each groove together form a wave-like profile of at least three sets of alternating triangular peaks and triangular valleys to help impede the flow of fibrous material,
- wherein at least a first tooth in the plurality of teeth within at least one of the grooves is rotated relative to a central axis extending along the groove.
An apparatus for refining fibrous material, the apparatus comprising:
- a plate segment having a refining zone disposed between an inner edge and an outer edge of the plate segment and between a first and opposing second peripheral edge, the refining zone including a plurality of bars and grooves arranged in an alternating configuration and extending in a generally radial direction along the plate segment from the inner edge toward the outer edge, wherein each groove is positioned between a first bar and a second bar, the first and second bars each having a side wall facing a corresponding groove, the side wall extending upwardly from a base surface of the groove;
- a plurality of teeth arranged within each groove, each tooth extending across the groove from the side wall of the first bar to the side wall of the second bar, each tooth having a ramp extending upwardly from the base surface of the groove toward a peak and a tail extending downwardly from the peak toward a valley, wherein the plurality of teeth within each groove together form a wave-like profile of at least three sets of alternating triangular peaks and triangular valleys to help impede the flow of fibrous material,
- wherein a first plurality of teeth within at least one of the grooves includes a slanted peak that is continuously sloped as it extends across the groove from the side wall of the first bar to the side wall of the second bar, the slanted peak having a first height adjacent the side wall of the first bar and a second height adjacent the side wall of the second bar, wherein the first height is different from the second height, and wherein a second plurality of teeth within at least another one of the grooves is rotated relative to a central axis extending along the groove.
An apparatus for refining fibrous material, the apparatus comprising:
- a plate segment having a refining zone disposed between an inner edge and an outer edge of the plate segment and between a first and opposing second peripheral edge, the refining zone including a plurality of bars and grooves arranged in an alternating configuration and extending in a generally radial direction along the plate segment from the inner edge toward the outer edge, wherein each groove is positioned between a first bar and a second bar, the first and second bars each having a side wall facing a corresponding groove, the side wall extending upwardly from a base surface of the groove;
- a plurality of teeth arranged within each groove, each tooth extending across the groove from the side wall of the first bar to the side wall of the second bar, each tooth having a ramp extending upwardly from the base surface of the groove toward a peak and a tail extending downwardly from the peak toward a valley, wherein the plurality of teeth within each groove together form a wave-like profile of alternating peaks and valleys to help impede the flow of fibrous material;
- and wherein at least a first tooth in the plurality of teeth within at least one of the grooves includes a first slanted peak that is continuously sloped as it extends across the groove from the side wall of the first bar to the side wall of the second bar, the slanted peak having a first height adjacent the side wall of the first bar and a second height adjacent the side wall of the second bar, wherein the first height is different from the second height.
An apparatus for refining fibrous material, the apparatus comprising:
- a plate segment having a refining zone disposed between an inner edge and an outer edge of the plate segment and between a first and opposing second peripheral edge, the refining zone including a plurality of bars and grooves arranged in an alternating configuration and extending in a generally radial direction along the plate segment from the inner edge toward the outer edge, wherein each groove is positioned between a first bar and a second bar, the first and second bars each having a side wall facing a corresponding groove, the side wall extending upwardly from a base surface of the groove;
- a plurality of teeth arranged within each groove, each tooth extending across the groove from the side wall of the first bar to the side wall of the second bar, each tooth having a ramp extending upwardly from the base surface of the groove toward a peak and a tail extending downwardly from the peak toward a valley, wherein the plurality of teeth within each groove together form a wave-like profile of alternating peaks and valleys to help impede the flow of fibrous material;
- and wherein each tooth in the plurality of teeth within at least one of the grooves is rotated relative to a central axis extending along the groove, the teeth being rotated at an angle between 1° and 75° relative to a line perpendicular to central axis extending along the groove.
Dependencies are inferred from the claim text.