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公开(公告)号：US12060680B2
公开(公告)日：2024-08-13
申请号：US17894384
申请日：2022-08-24
申请人： VALMET AB
发明人： Robert Short
IPC分类号： D21D1/30
CPC分类号： D21D1/303
摘要： A method for updating a disc refiner by at least partly covering notches of a locknut in the disc refiner and an accessory for a disc refiner Said disc refiner comprising a motor and a rotation shaft assembly, wherein said rotation shaft assembly comprises a rotation shaft, which is connecting the motor and a rotor refiner disc of the disc refiner for driving rotation of the rotor refiner disc from the motor, said rotation shaft assembly further comprising at least one bearing, which is provided between a shaft housing and the rotation shaft for allowing rotation of the rotation shaft within the shaft housing, said rotation shaft assembly further comprising at least one ring-shaped locknut, which is encircling the rotation shaft and configured for holding the at least one bearing in place on the rotation shaft, said locknut comprising notches for a tool to grip when attaching the locknut in the rotation shaft assembly, wherein said accessory is configured for being attached to the locknut and comprises at least one covering part configured for at least partly covering said notches of the locknut when attached to the locknut.
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公开(公告)号：US12031270B2
公开(公告)日：2024-07-09
申请号：US17702113
申请日：2022-03-23
申请人： VALMET AB
发明人： Thommy Lindblom , Leonardo Gabriel
IPC分类号： D21D1/30
CPC分类号： D21D1/306
摘要： A refiner segment (101; 201) for use in a refiner disc (30; 30*) of a refiner (100) for refining of lignocellulosic material, said refiner segment (1) having an active surface comprising a plurality of bars (10) which are extending over the active surface (2) towards an outer periphery (18b) of the refiner segment, wherein at least three of the bars (10) comprises a last-box fluid connection (21) which is a fluid connection provided through the bar (10) for connecting a last box (23a) on one side of this bar with a last box (23a) on the other side of this bar (10) such that a pressure can be equalized between these two last boxes (23a) via the last-box fluid connection (21), wherein said last-box fluid connection (21) is provided in the bar (10) at a distance between 0.0-15.0 mm from the closest last dam (11a) which is extending from this bar (10) to another adjacent bar (10).
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公开(公告)号：US11905660B2
公开(公告)日：2024-02-20
申请号：US17989428
申请日：2022-11-17
申请人： ANDRITZ INC.
发明人： Luc Gingras , Ismo Ihalainen
摘要： A deflaker plate for a deflaker machine may include a substrate and a plurality of teeth extending from the substrate, wherein a specified number of teeth of the plurality of teeth have a serrated face.
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公开(公告)号：US11905659B2
公开(公告)日：2024-02-20
申请号：US17046439
申请日：2019-02-20
申请人： VALMET AB
发明人： Thommy Lindblom
摘要： A refiner segment for a refiner of lignocellulosic material includes a first bar, a second bar, a first dam, and a second dam. The first bar has a width and includes a first bar weakening section. The first bar weakening section includes two planar faces defining a wedge-shaped recess with a tip and a base. The two planar faces meet at the tip. The tip is separated from the base by a depth. The depth is greater than or equal to half of the width and less than or equal to the width. The first dam extends between the first bar and the second bar. The second dam extends between the first bar and the second bar. The first bar, the second bar, the first dam, and the second dam define a first essentially box-shaped region. The first bar weakening section is positioned within the first essentially box-shaped region.
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公开(公告)号：US11795616B2
公开(公告)日：2023-10-24
申请号：US17149995
申请日：2021-01-15
申请人： VALMET AB
发明人： Thommy Lindblom , Marcus Sjölund
CPC分类号： D21D1/306 , B02C7/12 , D21D1/303 , D21D1/306 , B02C7/12 , D21D1/303 , D21D1/30 , D21B1/14 , D21D1/006
摘要： The present invention relates to a blade for a disc refiner intended for refining lignocellulosic material, the blade (10) comprising
a surface (1) delimited by an inner circumference (11) and an outer circumference (12),
a refiner zone (2) on the surface (1) for refining lignocellulosic material,
a blank zone (3) on the surface (1),
wherein the refiner zone (2) is arranged closer to the inner circumference (11) than the blank zone (3),
the blade (10) further comprising
a separation groove (4) that is arranged between the refiner zone (2) and the blank zone (3), and
at least one connecting groove (5) that connects the separation groove (4) to the outer circumference (12) of the blade (10) across the blank zone (3).
The invention also relates to a blade pair and to a refiner comprising at least one blade.-
公开(公告)号：US20230243098A1
公开(公告)日：2023-08-03
申请号：US18009456
申请日：2021-06-07
发明人： Marko Loijas , Matti Kaarineve
摘要： A blade segment (4, 4a, 4b, 8, 8a, 8b) for a refiner (1) for refining fibrous material has first (20) and second (21) end edges and first (22) and second (23) side edges, the first (22) and second (23) side edges extending between the first (20) and second (21) end edges. The segment has a refining surface (5, 9) with blade bars (27) and grooves (28) on the segment front surface (25). At least one opening (14, 15) at the side edge (22, 23) extends through the whole thickness of the segment body (24) and towards the opposite side edge (22, 23). A guide element projects from the segment background surface (26) at the side edge which provides a guide surface that intensifies the feed of the material to be refined through the opening to the refining surface of the blade segment into the refining chamber of the refiner.
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公开(公告)号：US11674265B2
公开(公告)日：2023-06-13
申请号：US17166211
申请日：2021-02-03
申请人： VALMET AB
发明人： Thommy Lindblom , Christer Hedlund
摘要： The invention relates to a center ring arrangeable on a refining disc of a defibrator for refining of fibrous material, wherein said center ring comprises a circumferential outer surface, a circumferential inner surface and a centrally located through-hole adapted to receive fibrous material fed from a feeding device, wherein said outer surface is provided with a circumferentially running groove opening up on the outer surface and being adapted to collect steam produced during operation of said defibrator, and wherein the center ring further comprises a plurality of wings provided on said inner surface and a number of channels extending from said groove to the positions on said inner surface where said wings are provided.
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公开(公告)号：US11643778B2
公开(公告)日：2023-05-09
申请号：US17451027
申请日：2021-10-15
申请人： ANDRITZ INC.
发明人： Luc Gingras
摘要： A disperser apparatus includes: a first disperser assembly configured to rotate around an axis; and a second disperser assembly facing the first disperser assembly. The first and second disperser assemblies each have a plurality of disperser-refiner plate segments annularly arranged. Each of the disperser-refiner plate segments includes a substrate having teeth extending from the substrate and arranged in rows disposed at radial intervals defining a dispersion section. Each tooth has a tooth height; and walls; and edges at junctions of adjacent walls. Each of the disperser-refiner plate segments further includes a refining section of refiner bars extending from the substrate, wherein adjacent refiner bars and the substrate define a groove between the adjacent refiner bars; and a plurality transition bars disposed between radially outermost teeth and the refining section.
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公开(公告)号：US20230047528A1
公开(公告)日：2023-02-16
申请号：US17798133
申请日：2021-03-12
申请人： ANDRITZ AG
发明人： Thomas Reisinger , Peter Ortner , Daniel Hogue , Christian Harpin
IPC分类号： D21D1/30
摘要： A refiner for refining pulps, includes a shaft, a rotor disc attached firmly to the shaft and a shaft bearing, the rotor disc being disposed between two stator discs and forming a refining chamber between the rotor disc and the stator discs. The shaft is movable in an axial direction and the shaft bearing is connected hydraulically to the refining chamber, ensuring low wear on the rotor discs and stator discs and, in particular, on the refiner plates on these discs, also in continuous operation.
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公开(公告)号：US11566374B2
公开(公告)日：2023-01-31
申请号：US16765536
申请日：2018-11-20
申请人： VALMET AB
发明人： Thommy Lindblom
摘要： A refiner plate that is adapted to be attached to a rotatable refiner disc on a refiner for mechanical treatment of lignocellulosic material. The refiner plate includes a refining surface that is adapted to be arranged oppositely a second refining surface of a second refiner disc on said refiner. The refining surface is provided with a plurality of refining bars, where at least one of the refining bars is provided with cavities that are at least partially embedded in the refining bars. At least one cavity provided on the at least one refining bar have one end arranged closer to the leading edge of a refining bar and one end arranged closer to the trailing edge of the refining bar and wherein the depth dimension of the cavity at the end is smaller than the depth dimension of the cavity at the end.
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