US3843065A - Labyrinth seal ring for pulp refiner - Google Patents

Labyrinth seal ring for pulp refiner Download PDF

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Publication number
US3843065A
US3843065A US00297177A US29717772A US3843065A US 3843065 A US3843065 A US 3843065A US 00297177 A US00297177 A US 00297177A US 29717772 A US29717772 A US 29717772A US 3843065 A US3843065 A US 3843065A
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US
United States
Prior art keywords
joint
disc
fluid
passage
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00297177A
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English (en)
Inventor
A Horstman
W Mcneil
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sprout Bauer Inc
Bauer Brothers Co
Original Assignee
Bauer Brothers Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bauer Brothers Co filed Critical Bauer Brothers Co
Priority to US00297177A priority Critical patent/US3843065A/en
Priority to AU60422/73A priority patent/AU6042273A/en
Priority to BR7647/73A priority patent/BR7307647D0/pt
Priority to AT873973A priority patent/AT335274B/de
Priority to JP48114652A priority patent/JPS4973757A/ja
Application granted granted Critical
Publication of US3843065A publication Critical patent/US3843065A/en
Assigned to SPROUT-BAUER, INC., reassignment SPROUT-BAUER, INC., MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE JULY 9, 1987 Assignors: SWM CORPORATION, MERGED INTO BAUER BROS. CO. CHANGED TO
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills

Definitions

  • references Cited UNITED STATES PATENTS 2/1902 Copenhaver 277/70 UX g A disc refiner wherein there are means for channelling [11] 3,843,065 I451 Oct.22, 1974 Bunge 277/57 Horstman 277/134 X Primary Examiner-Samuel B. Ro'thberg Attorney, Agent, or Firm-Jerome P. Bloom ABSTRACT solids to its rotary discs for refining therebetween and discharge characterized by sealing means inhibiting unrefined solids'from by-passing the discs and discharging with the refined material.
  • the sealing means includes a labyrinth passage and provides for use of fluid under pressure serving as a dynamic dam for blocking and maintaining unrefined solids in their required line of flow. In certain instances the fluid will serve also as alubricant between relatively moving parts,
  • the invention has special utility in disc refiners which operate on fibrous solids to produce individual fibers and fiber aggregates for use in end products such as paper, fiber board and the like.
  • the refiner ring on the relateddisc both rings being of novel configuration.
  • the mating surfaces of therings effectively define a pressure area or chamber wherein fluid is suitably applied to form a dam or repelling force inhibiting throughflow of solids. The, result is to effectively prevent contamination of the refined produce discharged from the refiner, to reduce the normal incidence of wear at the infeed joint, and to obviate excessive power case houses a pair of relatively rotatable discs.
  • the refiner case and one of the discs have communicating openings forming an inlet passage or feed conduit for fragmented solids in a slurry form to flow directly to and move radially outward between the operating faces of the refiner discs as they relatively rotate.
  • the discs produce individual fibers and fiber aggregates which are radially discharged to the case interior, from which they exit as a refined product.
  • There have been continuing and serious problems in such devices due to the tendency of unrefined solids to by-pass the refiner discs by moving radially outward through the joint between the case and the relatively rotating feed disc defining the feed conduit.
  • the highly objectionable results are the contamination of the refined product by the unrefined solids and considerable wear at the joint through which the contaminating solids escape.
  • resulting frictional forces bring on increased power consumption and uncertain start-ups.
  • the present invention is a solution to the above problems.
  • This invention not only obviates the above noted problems but has in view a generally improved means of providing the feed conduit in disc refiners.
  • an embodiment is particularly characterized by means utilizing fluid pressure in the noted joint in a manner to preclude or block passage therethrough of any significant solids.
  • the joint is defined by a seal ring on the refiner case and an entrance consumption and balky start-ups.
  • the invention contemplates that in the process there will and can be a lubrication of the joint with attendant benefits.
  • a primary object of the invention is to provide improvements in the feed characteristics in disc refiners of the class described which are economical to effect and produce a unit more efficient and satisfactory in use, adaptable to a wide variety of applications and one unlikely to'malfunction.
  • a further object of the invention is to provide improvements of the infeed structure of a disc refiner which inhibit contamination of its discharge by unrefined solids.
  • Another object of the invention is to provide unique sealing means for use at a joint between relatively moving parts.
  • a further object of the invention is to provide in'a feed passage defined by relatively rotating parts and in a joint therebetween a pressure chamber utilizing fluid to block or repel passage of solids through such joint.
  • a still further object of the invention is to obviate problems brought on by the lodging of material in a joint in a materials feed passage.
  • An additional object of the invention is to provide an improved seal at a joint between relatively rotating parts possessing the advantageous structural features, the inherent meritorious characteristics and the means 7 and mode of use herein described.
  • FIG. 1 is a vertical section of a disc refiner embodying the invention
  • FIG. 2 is a fragmentary section of FIG. 1 on an enlarged scale
  • FIG. 3 is a view illustrating the operating face of the seal ring of the disc refiner.
  • FIG. 4 is a view illustrating the operating surface of the entrance ring which cooperates with the seal ring.
  • the refiner case comprises a unitary, central, tubular waist section sealed at its lower end by a dome-like bottom cap 13 and at its top or its other end by a dome-like cap 14.
  • the case elements are so connect ed to be suitably sealed together to'provide a chamber 15.
  • Formed in a side wall 11 of the case section 10 is an inlet opening 12 and in its bottom cap 13 a discharge opening 16.
  • Fixed to the wall 11 is an adapter providing a feed inlet chute 17.
  • the chute 17 has formed therein an inclined feed passage 18 the lower end of which slurry embodying particles of raw solids is fed to and through the feedpassage 18 by way of suitable valve means which maintain a pressure sealof the chamber at inlet 12.
  • a similar valve means handles the refined material in discharge thereof from the opening 16 amd maintains a pressure seal of the chamber 15 at its dischargeopening.
  • Openings in the upper and lower case sections, for inspection or drain, are conventionally provided with releasable sealing plugs.
  • the disc unit 21 mounts on one extremity of a drive shaft 23 which extends rearwardly thereof through. the center of inlet opening 12, the lower end of feed passage 18 and outwardly through a sealing gland 24 mounted in an opening in feed chute 17.
  • the outer or other extremity of shaft 23 is coupled to and driven by a suitable motor (not shown).
  • the disc unit 22 mounts on the inner end ofa similar drive shaft 23' which is co-axial with shaft 23 and extends through a sealing gland 24' in the wall of case section 10.
  • the shaft 23' has its outer extremity coupled to a suitable drive motor (not shown).
  • the seal ring 28 has inner and outer peripheral portions, the latter contacting surface 26 and the former constituting a part of the flow channel from opening 12 to the disc assembly.
  • the face of the ring 28 most adjacent the disc assembly is formed with a continuous annular groove or recess 32 which is generally rectangular in cross section, providing it with approximately parallel sides and a bottom which is perpendicular to the sides.
  • the passages 33 diverge to open at their other ends at the inner periphery of the disc refining surface and to the complementary facing refining'surface of disc unit 22.
  • the disc At the rear face of disc 21, immediately about the feed passages 33, the disc has a counterbore in adjacent facing coaxial relation to that forming the shoulder 25.
  • This counterbore provides a shoulder 34 which is positioned parallel to shoulder 25.
  • shoulder 34 At the outer periphery of shoulder 34 is a shallow cylindrically formed wall 35 disposing coaxial with wall surface 26.
  • shoulder 34 has its inner periphery formed on a larger radius than the inner periphery of shoulder 25.
  • Fixed to seat to the shoulder 34 and wall 35 Fixed to seat to the shoulder 34 and wall 35 is an entrance ring 36 formed as to its inner and outer peripheral dimension generally in accordance with that of the sealing ring 28,
  • the ring 36 is formed, intermediate its inner and outer peripheral portions, with an annular projecting rib or tongue 42.
  • the orientation of the parts places the rib 42 in a penetrating, nesting, male-female relation to recess 32,
  • the thickness of projection 42 is somewhat less in dimension than the width of recess 32 so that in assembled relation of the parts annular radially displaced spaces 43 and 44 are produced to the outer sides of the projection 42 within the recess 32.
  • the extent of the projection of the rib 42 from ring 36 taken with the extent of permitted approach between the sealing and entrance rings, provides at the bottom of recess 32 an annular, relatively deeper, chamber 45 which commonly communicates with the spaces 43 and 44 and orients perpendicularly thereof.
  • the spacing of rings 28 and 36 still further provides, between opposing sides or faces thereof, inner and outer spaces 46 and 47 in parallel offset relation to chamber 45 and respectively communicating with remote ends of annular spaces 43 and 44.
  • Space 46 opens into the flow channel to feed passages 33.
  • Space 47 opens into a housing area Communicating with refining chamber 115.
  • the entrance ring 36 accordingly is in a non-bearing, noncontacting relation to the sealing ring 23 with, however, the space therebetween forming a restricted, circuitous passageway made up of intercommunicating spaces 46, 43, chamber45 and spaces 44 and 47.
  • the sealing ring 28 is formed with through longitudinal bores 48, radially offset toward the inner peripheral portion of the ring.
  • each bore 48 opens simultaneously into chamber 45 and space 46.
  • the bores 48 open upon shoulder 25 where, in re sponse to a suitable rotary positioning at the sealing ring, they align with other respective through bores 49 in housing wall ll.
  • bores 49 are internally threaded to facilitate a coupling thereto of conduit means delivering steam or another fluid under pressure.
  • the fluid is supplied at a pressure somewhat exceeding the expected high pressure established in chamber 15.
  • the disc units when the disc units are energized and a slurry in the form of fibrous solids embodied in a fluid vehicle is delivered to the refiner under required pressure, then the slurry will be moved directly through passage 16, inlet opening l2, past rings 28 and 36, and be funnelled to a central area intermediate the discs 21 and 22 by way of funnelling ring surface 37 and feed passages 33.
  • the relative rotation of the discs will cause a radial outward movement of the slurry content to be refined between their operating faces.
  • the fluid utilized as a pressure block in'the joint By appropriate choice of the fluid utilized as a pressure block in'the joint, one can avoid not only a contamination of the desired end product but also maintain the close clearance surfaces of the rings 28 and 36 in a lubricated state. This avoids wear, jamming and other mechanical difficulties which are detrimental to refiner operation and its cost of maintenance.
  • the fluid used could be for example water, steam, or air.
  • the invention above disclosed has proven in test to have the unique advantage and results attributed.
  • the burning of seals and contamination of products of double disc refining has been overcome.
  • a disc refiner including a housing, a pair of relatively opposed refiner discs mounted for rotation within a chamber defined in said housing, one of said refiner discs including at least one feed passage for material to move between said discs to be refined thereby and discharged therefrom, said housing having means defining an inlet to said chamber and further means defining an outlet therefrom, said means defining said inlet and said one disc including complementary ring means forming a flow channel for directing the material to be refined to move to and through said disc feed passage, one of said ring means forming an axial extension being directed to open to said joint intermediate its extremities at a location to provide that the fluid exiting therefrom'under pressure will flow within said joint in respectively opposite directions to exert a blocking and cleansing influence in said joint.
  • Apparatus as set forth in claim 1 characterized by an intermediate area of said joint being expanded relative the extremities thereof to provide a pressure chamber forming said space into which the fluid from said passage exits which inhibits passage of solid particles through said joint.
  • a disc refiner including a housing, disc means mounted for rotation in said housing, means forming an inlet for directing material to be refined between said disc means, one of said disc means being adjacent said inlet and having at least one feed passage for material to pass therethrough to be refined between said disc means, relatively adjacent parts on said housing and said one of said disc means cooperating to define a flow channel leading from said inlet to said feed passage in said one disc means, said relatively adjacent parts being formed to have the adjacent ends thereof in a closely spaced relation and defining a labyrinth type passageway an inner radial limit of which opens to said flow channel and an outer radial limit of which opens to said housing, and means to simultaneously direct fluid under pressure to move from the radial limits of said passageway to exert both a blocking and ejecting influence on particles of material which attempt to move to and through said passageway from said flow channel.
  • a disc refiner according to claim 5 characterized in that the adjacent ends of said relatively adjacent parts being formed to relatively nest in a male-female relation forming a restricted circuitous passageway from the inner to the outer radial limits thereof an intermediate portion of which is relatively expanded to provide a chamber in which fluid under pressure may build up prior to exit simultaneously to the respective radial limits of said passageway.
  • a disc refiner including a housing, a pair of relatively opposed refiner discs mounted for rotation within a chamber defined in said housing, one of said refiner discs including at least one feed passage for material to move between said discs to be refined thereby and discharged therefrom, said housing having means defining an inlet to said chamber and further means defining an outlet therefrom, said means defining said inlet and said one disc including complementary ring means forming a flow channel for directing the material to be refined to move to and through said disc feed passage, one of said ring means being an axial extension of the other and adjacent faces of said ring means being in a closely spaced relation to define a low clearance area therebetween, one of said ring means having a passage therein for directing fluid therethrough under pressure to exit therefrom and produce a fluid joint between said adjacent faces of said ring means, said fluid joint opening at one extremity to said flow channel and at the other extremity to said chamber, one of said adjacent faces of said ring means having an annular groove and the other having a complementary mating annular projection

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  • Crushing And Grinding (AREA)
  • Paper (AREA)
US00297177A 1972-10-13 1972-10-13 Labyrinth seal ring for pulp refiner Expired - Lifetime US3843065A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00297177A US3843065A (en) 1972-10-13 1972-10-13 Labyrinth seal ring for pulp refiner
AU60422/73A AU6042273A (en) 1972-10-13 1973-09-18 Labyrinth seal ring for pulp refiners
BR7647/73A BR7307647D0 (pt) 1972-10-13 1973-10-02 Aperfeicoamentos em refinador de discos
AT873973A AT335274B (de) 1972-10-13 1973-10-12 Scheibenmuhle
JP48114652A JPS4973757A (cs) 1972-10-13 1973-10-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00297177A US3843065A (en) 1972-10-13 1972-10-13 Labyrinth seal ring for pulp refiner

Publications (1)

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US3843065A true US3843065A (en) 1974-10-22

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Family Applications (1)

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US00297177A Expired - Lifetime US3843065A (en) 1972-10-13 1972-10-13 Labyrinth seal ring for pulp refiner

Country Status (5)

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US (1) US3843065A (cs)
JP (1) JPS4973757A (cs)
AT (1) AT335274B (cs)
AU (1) AU6042273A (cs)
BR (1) BR7307647D0 (cs)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392719A1 (fr) * 1977-06-03 1978-12-29 Bauer Bros Co Disque d'alimentation pour appareils de raffinage a disques
US4269564A (en) * 1978-10-02 1981-05-26 Bank Of America N.T. & S.A. Flow control device
US4533148A (en) * 1984-10-04 1985-08-06 Lindahl Lemoyne Sealing ring assembly for use in pulp refining equipment
US4743034A (en) * 1987-03-27 1988-05-10 Durametallic Corporation Labyrinth bearing protector seal
US5087082A (en) * 1988-12-13 1992-02-11 Indu-Tech Enterprises Ltd. Rotary joint
EP1070377A4 (en) * 1998-04-08 2001-10-17 Thermo Black Clawson Inc COMPLETE PULP PROCESSING PLANT WITH INTEGRATED DRIVE AND CONTROL, AND ITS USAGE TECHNIQUES
US20060247177A1 (en) * 2003-04-04 2006-11-02 Millar Robert P Gonadotropin releasing hormone analogues conjugates with steroid hormones
WO2009136849A1 (en) * 2008-05-08 2009-11-12 Metso Paper, Inc. Coaxial feeder with threads having a top
CN104437737A (zh) * 2014-11-29 2015-03-25 济南中阳石磨电器有限公司 一种电动石磨
RU236086U1 (ru) * 2025-04-11 2025-07-28 Не публикуется в соответствии с постановлением Правительства РФ от 2 сентября 2024 г. N 1209 Уплотнительный узел рабочего колеса насоса

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392719A1 (fr) * 1977-06-03 1978-12-29 Bauer Bros Co Disque d'alimentation pour appareils de raffinage a disques
US4269564A (en) * 1978-10-02 1981-05-26 Bank Of America N.T. & S.A. Flow control device
US4533148A (en) * 1984-10-04 1985-08-06 Lindahl Lemoyne Sealing ring assembly for use in pulp refining equipment
US4743034A (en) * 1987-03-27 1988-05-10 Durametallic Corporation Labyrinth bearing protector seal
US5087082A (en) * 1988-12-13 1992-02-11 Indu-Tech Enterprises Ltd. Rotary joint
EP1070377A4 (en) * 1998-04-08 2001-10-17 Thermo Black Clawson Inc COMPLETE PULP PROCESSING PLANT WITH INTEGRATED DRIVE AND CONTROL, AND ITS USAGE TECHNIQUES
US6617720B1 (en) 1998-04-08 2003-09-09 Kadant Black Clawson Inc. Integrated paper pulp and process machinery having integrated drive and control and methods of use thereof
US20060247177A1 (en) * 2003-04-04 2006-11-02 Millar Robert P Gonadotropin releasing hormone analogues conjugates with steroid hormones
US7700559B2 (en) 2003-04-04 2010-04-20 Medical Research Council Gonadotropin releasing hormone analogues conjugates with steroid hormones
WO2009136849A1 (en) * 2008-05-08 2009-11-12 Metso Paper, Inc. Coaxial feeder with threads having a top
CN104437737A (zh) * 2014-11-29 2015-03-25 济南中阳石磨电器有限公司 一种电动石磨
RU236086U1 (ru) * 2025-04-11 2025-07-28 Не публикуется в соответствии с постановлением Правительства РФ от 2 сентября 2024 г. N 1209 Уплотнительный узел рабочего колеса насоса

Also Published As

Publication number Publication date
AU6042273A (en) 1975-03-20
JPS4973757A (cs) 1974-07-16
AT335274B (de) 1977-03-10
BR7307647D0 (pt) 1974-08-15
ATA873973A (de) 1976-06-15

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SPROUT-BAUER, INC.,

Free format text: MERGER;ASSIGNOR:SWM CORPORATION, MERGED INTO BAUER BROS. CO. CHANGED TO;REEL/FRAME:004810/0977

Effective date: 19871029