Refiner plate with gradually changing geometry
First Claim
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1. A refiner plate segment comprising:
- an outer periphery;
an inner arc distally disposed from the outer periphery;
a first lateral edge;
a second lateral edge distally disposed from the first lateral edge; and
a refining surface disposed between the outer periphery and the inner arc comprising;
a pattern of bars and grooves disposed between the outer periphery and the inner arc in multiple bands, wherein the pattern of bars and grooves in each band of the multiple bands has a density, wherein each bar has ends,wherein the pattern of bars and grooves in a first band of the multiple bands disposed closer to the inner arc has a lesser density than a pattern of bars and grooves in an adjacent band of the multiple bands disposed closer to the outer periphery as measured along a radial line configured to extend from a center of rotation of the refiner plate segment when the refiner plate segment is mounted to a mechanical refiner; and
a transition zone, wherein the transition zone is arranged at an angle of between 20° and
85°
relative to the radial line, wherein the transition zone borders a side of at least one of the multiple bands, wherein the density of the pattern of bars and grooves increases within a band of the multiple bands as measured from a point on the band nearer the inner arc to a point on the band nearer the outer periphery, and wherein the transition zone is distributed across the refining surface.
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Abstract
A refiner plate segment with a continuous transition zone spanning from the periphery or near the periphery of the plate in a substantial spiral toward the axis of rotation of the plate adjacent the breaker bar zone.
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Citations
20 Claims
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1. A refiner plate segment comprising:
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an outer periphery; an inner arc distally disposed from the outer periphery; a first lateral edge; a second lateral edge distally disposed from the first lateral edge; and a refining surface disposed between the outer periphery and the inner arc comprising; a pattern of bars and grooves disposed between the outer periphery and the inner arc in multiple bands, wherein the pattern of bars and grooves in each band of the multiple bands has a density, wherein each bar has ends, wherein the pattern of bars and grooves in a first band of the multiple bands disposed closer to the inner arc has a lesser density than a pattern of bars and grooves in an adjacent band of the multiple bands disposed closer to the outer periphery as measured along a radial line configured to extend from a center of rotation of the refiner plate segment when the refiner plate segment is mounted to a mechanical refiner; and a transition zone, wherein the transition zone is arranged at an angle of between 20° and
85°
relative to the radial line, wherein the transition zone borders a side of at least one of the multiple bands, wherein the density of the pattern of bars and grooves increases within a band of the multiple bands as measured from a point on the band nearer the inner arc to a point on the band nearer the outer periphery, and wherein the transition zone is distributed across the refining surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 20)
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17. A refiner plate segment comprising:
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a refining zone having a pattern of bars and grooves wherein each bar has ends; and transition zones disposed on the refining zone to create X shapes, wherein diamond shapes are created in the refining zone by the X shapes created by the transition zones, and wherein a density of bars in the pattern of bars and grooves within each diamond shape increases radially from a first diamond shape nearer to an inner arc to an adjacent diamond shape further from the inner arc, wherein the transition zones are distributed across the refiner plate segment.
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18. A refiner plate segment comprising:
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an outer periphery; an inner arc disposed across from the outer periphery; a first lateral edge; a second lateral edge disposed across from the first lateral edge; and a refining surface having a pattern of bars and grooves, wherein the refining surface is disposed between the inner arc and the outer periphery, the refining surface comprising; multiple transition zones, wherein the transition zones are disposed to adjacent transition zones, wherein each transition zone is distributed in a line across the refiner plate segment, wherein the line spans the refining surface at an angle of between 20° and
85°
relative to a radial line passing through the refiner plate segment, wherein the radial line is configured to extend from a center of rotation of the refiner plate segment when the refiner plate segment is mounted to a mechanical refiner,wherein an area between adjacent transition zones forms a spiral band, wherein multiple adjacent transition zones form multiple spiral bands, wherein one or more bars span across two or more transition zones, wherein the pattern of bars has a density, wherein a transition zone of the multiple transition zones is defined by an increase in density between a first spiral band of the multiple spiral bands disposed closer to the inner arc and an adjacent spiral band of the multiple spiral bands disposed further from the inner arc, and wherein the density increases within the multiple spiral bands from a point of each spiral band disposed closer to the first lateral edge to a point of the spiral band disposed closer to the second lateral edge. - View Dependent Claims (19)
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Specification