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公开(公告)号：US20210146371A1
公开(公告)日：2021-05-20
申请号：US17021075
申请日：2020-09-15
申请人： VALMET AB
发明人： Christer HEDLUND
摘要： The proposed technology provides refiner segment pair comprising a first segment (30) and a second segment (31), said first segment (30) being configured to be used with a rotor disc for a refiner of lignocellulosic material and said second segment being configured to be used with a stator disc for said refiner of lignocellulosic material, said first and second refining segments (30; 31) comprising protruding structures (40) for grinding of said lignocellulosic material. The height of the protruding structures (40) on said first refining segment (30) is at least three times larger than the height of the protruding structures (40) on said second refiner segment (31). The proposed technology also provides a refiner comprising such a refiner segment pair and the use of a refiner segment pair (30; 31) in a refiner (1) for refining lignocellulosic material.
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公开(公告)号：US11001968B2
公开(公告)日：2021-05-11
申请号：US15860055
申请日：2018-01-02
摘要： A refining member comprising a refining body with a refining surface comprising first and second refiner bars separated by first and second refiner grooves, respectively. The first refiner bars extend from a radially inward position to a first radially outward position. The second refiner bars extend to a second radially outward position that is nearer to an outermost part of the refining body than the first radially outward position. The second refiner bars have a longitudinal length from about 0.6 cm to about 10 cm. The first and second refiner bars have a respective first and second maximum height extending upward from a floor of a respective, adjacent first or second refiner groove. The second maximum height is at least 0.35 mm less than the first maximum height. The first refiner bars are adapted to refine wood fibers and the second refiner bars are adapted to break up fiber bundles.
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公开(公告)号：US20210040689A1
公开(公告)日：2021-02-11
申请号：US17046439
申请日：2019-02-20
申请人： VALMET AB
发明人： Thommy LINDBLOM
摘要： Disclosed is a refiner segment (1) that is adapted to be attached to a refining disc (30) of a refiner (100) of lignocellulosic material. The refiner segment (1) comprises a number N, N≥2, of bars (10) and a number, M≥2, of dams (11), said bars (10) and dams (11, 11*) being arranged in a pattern whereby essentially box shaped regions (20) are created in areas defined by neighboring bars (10, 10*) and at least two dams (11, 11*) extending between said neighboring bars (10, 10*) at different locations along the length direction of the bars (10, 10*), wherein at least one of the bars (10, 0*) that defines such an essentially box shaped region (20) comprises a bar weakening section (12), arranged within said essentially box shaped region (20), and provided to enable steam trapped in said essentially box shaped region (20) to escape said essentially box shaped region (20) via said bar weakening section (12). Disclosed is also a refiner disc provided with such a refiner segment and a refiner comprising such a refiner segment.
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公开(公告)号：US10794003B2
公开(公告)日：2020-10-06
申请号：US15860006
申请日：2018-01-02
摘要： A refining member for a pulp refiner comprising a refining body with a refining surface comprising refiner bars separated by refiner grooves and teeth. Each of the refiner bars extend from a radially inward position on the refining surface to a first radially outward position on the refining surface, and the teeth extend to a second radially outward position on the refining surface. The second radially outward position is nearer to an outermost part of the refining body than the first radially outward position. The refiner bars are adapted to refine wood fibers, and the teeth are adapted to break up fiber bundles.
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公开(公告)号：US20190316295A1
公开(公告)日：2019-10-17
申请号：US16456154
申请日：2019-06-28
摘要： A refining member including a refining body with a refining surface including first and second refiner bars separated by first and second refiner grooves. The first and second refiner bars extend from respective first and second radially inward positions to respective first and second radially outward positions. The first and second refiner bars have a respective first and second height extending upward from a floor of a respective, adjacent first or second refiner groove. The second height is a minimum height of the second refiner bars and is spaced apart from the second radially inward position, with the second height being at least about 0.35 mm less than the first height. The first refiner bars are adapted to refine wood fibers and the second refiner bars are adapted to break up fiber bundles.
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公开(公告)号：US10400393B2
公开(公告)日：2019-09-03
申请号：US15117576
申请日：2014-12-23
申请人： Valmet AB
发明人： Anders Hawén
IPC分类号： B02C7/02 , B02C7/11 , D21D1/26 , D21D1/30 , B02C7/06 , D21D1/20 , B02C7/12 , D21D1/22 , D21D1/24
摘要： A refiner is disclosed comprising relatively rotatable inner and outer conical refining blades. The refining blades are coaxially arranged around a symmetry axis and are provided with first bars and second bars, respectively, for the grinding of fibrous material. The inner conical refining blade or any of the first bars of the inner conical refining blade extend further along the symmetry axis, in the direction of the tapering of the inner and outer conical refining blades, than the outer conical refining blade or any of the second bars of the counter conical refining blade.
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公开(公告)号：US10378149B2
公开(公告)日：2019-08-13
申请号：US15588900
申请日：2017-05-08
申请人： Valmet AB
发明人： Thommy Lindblom
摘要： The invention relates to a refiner plate segment in a refiner plate for mechanically refining of lignocellulosic material in a refiner, said refiner plate segment comprising at least a first, generally radially extending bar, a second, generally radially extending bar, a groove arranged and defined between said first, generally radially extending bar and said second, generally radially extending bar, and a main dam, which has a height H and is arranged in the groove, wherein a pre-dam is arranged in front of the main dam, said pre-dam has a height h which is less than the height H of the main dam.
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公开(公告)号：US20190203417A1
公开(公告)日：2019-07-04
申请号：US15860006
申请日：2018-01-02
IPC分类号： D21D1/30
摘要： A refining member for a pulp refiner comprising a refining body with a refining surface comprising refiner bars separated by refiner grooves and teeth. Each of the refiner bars extend from a radially inward position on the refining surface to a first radially outward position on the refining surface, and the teeth extend to a second radially outward position on the refining surface. The second radially outward position is nearer to an outermost part of the refining body than the first radially outward position. The refiner bars are adapted to refine wood fibers, and the teeth are adapted to break up fiber bundles.
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公开(公告)号：US09999891B2
公开(公告)日：2018-06-19
申请号：US14323273
申请日：2014-07-03
摘要： A reducing machine having an air cooled cutting discs is disclosed. The air cooled discs have cutting surfaces on both sides. The cutting surfaces have edges which are sharpened for cutting input material when the cutting surface is facing the cutting surface of the opposed disc. When the cutting surface of the stationary disc is facing the housing, the cutting surface acts as a heat sink to air cool the stationary disc and the mill assembly in general. Air inlets in the housing lid permit air to flow over the cooling surface of the stationary plate. Air inlets in the carrying plate permit the carrying plate to channel air flow over the rotating cooling surface. A damper restricts air flow over the air cooling surfaces to control the temperature of the reducing machine, such as during start up.
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公开(公告)号：US09976253B2
公开(公告)日：2018-05-22
申请号：US15315212
申请日：2015-06-24
申请人： ANDRITZ FIEDLER GMBH
摘要： A set for mechanical processing suspended fibrous material includes a die plate having receiving openings in a predefined arrangement for insertion of blade-shaped processing elements which jut out on a process side and are flowed onto by the fibrous material. The blade-shaped processing elements have each a plurality of foot regions in longitudinally spaced-apart relation, which pass through the die plate (2) and jut out from the die plate on a process-distal. At least some of the foot regions of the processing elements reach into associated receiving grooves of a base plate on the process-distal side. As an alternative, transverse stiffening elements are arranged substantially orthogonally in the longitudinal direction of the processing elements such that the transverse stiffening elements stabilize the foot regions of the processing elements on the process-distal side.
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