EP3733962A1 - Schuhwalzenendmodul - Google Patents

Schuhwalzenendmodul Download PDF

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Publication number
EP3733962A1
EP3733962A1 EP19171556.4A EP19171556A EP3733962A1 EP 3733962 A1 EP3733962 A1 EP 3733962A1 EP 19171556 A EP19171556 A EP 19171556A EP 3733962 A1 EP3733962 A1 EP 3733962A1
Authority
EP
European Patent Office
Prior art keywords
pedestal
head
indexing
roll
end module
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.)
Granted
Application number
EP19171556.4A
Other languages
English (en)
French (fr)
Other versions
EP3733962B1 (de
Inventor
Seppo Kupiainen
Sami Lamminparras
Taneli Ylönen
Ville Eronen
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.)
Valmet Technologies Oy
Original Assignee
Valmet Technologies Oy
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 Valmet Technologies Oy filed Critical Valmet Technologies Oy
Priority to EP19171556.4A priority Critical patent/EP3733962B1/de
Priority to CN202010337584.7A priority patent/CN111851110B/zh
Publication of EP3733962A1 publication Critical patent/EP3733962A1/de
Application granted granted Critical
Publication of EP3733962B1 publication Critical patent/EP3733962B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/08—Pressure rolls

Definitions

  • the invention pertains to a shoe roll end module and in particular, to a shoe roll end module having indexing means to facilitate adjustment of a roll head's position.
  • a shoe roll end module comprises a pedestal, having an axle hole configured to accommodate an axle of a shoe roll and a roll head configured to hold a belt.
  • a ferrule is supported on the pedestal and directed to an inner side of the pedestal (towards the center of a paper or board machine comprising the shoe roll).
  • the roll head is supported on the ferrule in an axially movable manner.
  • an inner diameter of the ferrule can be configured to exceed an axle diameter of the axle so that the whole end module can be fitted to the axle by only one lifting.
  • At least two rod like indexing means are guided through respective bores in the pedestal and arranged with a predetermined distance around the axle hole in an equal angular distance, and being configured to control the movement of the roll head in relation to the pedestal in the said end module.
  • the indexing means can be arranged radially outside of the ferrule.
  • Provision of the rod like indexing means in the above-described manner enables a smooth and accurate control of the movement of the roll head towards the pedestal in a case where an adjustment of the belt's tension or a position change of the belt in order to reduce wear of the belt is required. Moreover, problems occurring due to jamming of the indexing means can be avoided, since there are at least two indexing means provided. In some cases a heavy outer indexing rod can control the movement of the head when placed close to ferrule's outer surface.
  • each of the indexing means can be formed as a single action annular cylinder configured to urge the roll head towards the pedestal.
  • each of the indexing means can be formed as a screw, the screw being in thread engagement with a thread bore provided in an indexing nut in connection to the pedestal and having an indexing head being in engagement with an outer side of the pedestal.
  • the bores through the pedestal can have an accommodation pocket on their side directed to the roll head, and at least one compression spring is accommodated in each accommodation pocket for indexing return movement means.
  • a plurality of coaxially arranged springs having a different spring rate can be provided.
  • a spring constant of the biasing spring can be determined such, that, despite thread engagement of the screws with the thread bore in the roll head, relative positions of the indexing heads are maintained.
  • Biasing springs make the return movement when the indexing nuts are turned and the annular cylinder is depressurized (which is the end status of every movement so that hydraulic oil leakage is eliminated). No constant pressure is needed and indexing nuts and springs keep the roll head on its indexed position.
  • each of the indexing means can be formed a as a working cylinder, having one of its ends attached with the roll head and having the other of its ends attached at the pedestal.
  • each of the indexing means can be formed as a rod having one end attached to the roll head, and the other end accommodated in a hollow indexing nut, the indexing nut being in thread engagement with the rod.
  • the rod can be guided through a slide bearing bush arranged at the outer side or inner side of the pedestal, and the screw is in thread engagement with an indexing nut being arranged outside of the pedestal.
  • a working cylinder can be provided at the inner side of the pedestal, the working cylinder being configured to change the roll head position.
  • the shoe roll head can comprise a controller configured to engage the indexing means simultaneously.
  • simultaneous operation of the indexing means can be done manually as well as automatically.
  • the axle hole can have a polygonal section and one or two surfaces of the axle hole serve as a torque surface.
  • a torque surface is defined as a surface of the axle hole, which is configured to absorb a torque of the axle occurring during operation of the shoe roll.
  • the shoe roll end module with support from the pedestal moves the support of the roll head further away from the stressed part of the axle where its profile changes from an axle stub to a support beam for a press shoe.
  • FIG. 1 to 4 Embodiments of the invention will be described by referring to Figs. 1 to 4 . While the arrangement of Figs. 3 and 4 is slightly different with regard to the shape of a pedestal 1, an eccentric member and a roll head 7, regarding the indexing means, their function is the same. Also it is noted that, for the same and similar elements, the same reference signs will be assigned.
  • Fig. 1 is a perspective view of a shoe roll end module comprising a pedestal and a roll head in a same assembly.
  • a pedestal 1 has an axle hole 11, which serves to accommodate an axle stub 3 of a shoe roll.
  • axle hole serves to accommodate an axle stub 3 of a shoe roll.
  • axle and related terms such as “axle hole” and “axle stub” are used throughout the application rather for sake of brevity.
  • a "pressure beam” and related terms such as an "accommodating hole for (such) a pressure beam” and a “stub of (such) a pressure beam”, respectively, are meant instead.
  • the axle hole 11 in section has an octagonal shape.
  • the highest surface 11b is finished with a degree of accuracy exceeding the finishing degree of the remaining seven surfaces.
  • This highest surface 11b serves as a torque surface, and is manufactured with
  • the shoe roll can be assembled above or below the counter roll, so the direction of the nip is in the 'flat' joint side of the pedestal and the torque surface is on the opposite side to that.
  • a corresponding surface of an axle stub 3 is manufactured with the same degree of accuracy.
  • a ferrule 5 as an axially elongated annular structure, is connected with the pedestal.
  • the ferrule 5 is connected with the pedestal by means of bolts 55.
  • the ferrule 5 is an annular member. It is connected with the pedestal 1 in a manner that its center axis OF deviates from the center axis OP of the pedestal. Thus, due to shifting of the ferrule 5, it is possible to achieve a required degree of eccentricity.
  • the ferrule 5 is inserted into an inner bore of the roll head 7.
  • the roll head 7 has an inner static structure and an outer dynamic (rotating) structure.
  • a bearing 75 and a seal 77 connect these two structures of the roll head and prevent leakage of fluid, e.g. lubrication fluid.
  • the roll head supports the belt 71.
  • a bellows 74 connects the roll head 7 with the pedestal and prevents contamination of the inner portions of the roll head 7. So the roll end module 2 is compact and easy to assemble together without a need to fit each piece to the axle separately. There is only one fitting for the whole end module so that a prefabricated end module can be assembled to the axle with one lifting.
  • the ferrule 5 has a flange 51 at its distal end, i.e. the flange 51 is provided at the side distanced from the pedestal 1.
  • the flange 51 extends radially outwards and has two functions, which will be described later. Furthermore, there is a distance between an inner surface of the ferrule 5 and the axle 3 of the shoe roll.
  • the roll head 7 In its bore, the roll head 7 has a radially inwards extending flange 73, which cooperates with a flange 51 at the distal end of the ferrule 5.
  • the flange 51 extends radially outwards.
  • the flange 51 serves to secure the roll head 7 by getting into abutment with a flange 73 of the roll head. That is, the flange 73 is provided radially inwards and is arranged in an axial position between the pedestal 1 and the flange 51 of the ferrule 5.
  • the gap can be used as a hydraulic or pneumatic chamber. Then, by introducing a fluid into the annular gap, movement of the roll head towards the pedestal can be performed. This is done for instance to adjust the belt's 71 tension or position.
  • the roll head 7 can be moved towards the pedestal (in fig. 3 towards the left side, in Fig. 4 to the right side) by supplying a fluid under pressure into the annular gap 53. That is, the annular gap serves as a pressure fluid chamber.
  • the roll head 7 is connected with the pedestal 1 by means of indexing means having a rod shape.
  • these indexing rods 9 are formed by a single action cylinder extending through a bore 15 provided in the pedestal 1 and being in thread engagement with a thread bore 72 in the roll head 7.
  • indexing rods 9 are provided.
  • the number of indexing rods can be arbitrarily chosen, as long as there is more than one indexing rod.
  • Fig. 4 shows some other elements required for the indexing such as the annular gap 53, which is used as a hydraulic chamber in the embodiment.
  • Each indexing rod 9 is provided with a fixed indexing head 91 on its outer end, that is, an end on the outer side of the pedestal 1. Moreover, an indexing nut 95 is arranged coaxially with the indexing rod 9 and the indexing head 91 such that it is arranged radially outside of the indexing rod 9, but radially inside of the indexing head 91. Moreover, the indexing nut 95 is in thread engagement with the indexing rod 9 by means of a thread 98. On its end directed to the pedestal 1, the indexing nut 95 has a stopper collar 97 having a tapered section and scale means 94.
  • the indexing nut 95 is movable together with the indexing head 91 when the indexing head is moved by means of the indexing rod 9 to an outer side of the pedestal, that is, towards the left side in Fig. 3 and to the right side in Fig. 4 , respectively.
  • recesses 97a (see Fig. 1 ) provided in the stopper collar 97 by means of a tool and rotating the stopper collar 97, a distance between the indexing nut 95 and the indexing head 91 can be appropriately set as is required.
  • a scale means is provided on the indexing nut 95. Since the roll head is moving together with the indexing rod 9, thereby the roll head's 7 distance towards the inner side of the pedestal 1 can be appropriately set as desired.
  • a distance between the indexing head 91 and the stopper collar 97 is rather small. That is, the indexing head 91 is almost fully covering the indexing nut 95.
  • Fig. 4 depicts a situation where the indexing nut 95 has been rotated to such an extent that the distance between the indexing head 91 and the stopper collar 97 is almost extended to the greatest possible distance.
  • the roll head 7 in Fig. 4 is moved much closer to the pedestal 1 than in Fig. 3 .
  • such a movement of the roll head 7 in the direction away from the pedestal 1 is effected by means of compression springs 92 and 93.
  • These springs 92 and 93 are arranged coaxially about the indexing rod 9, and are accommodated in a spring pocket 17 provided on the inner side of the pedestal 1 (the side directed to the machine center and the roll head 7, respectively).
  • an outwards movement of the indexing head 91 is effected hydraulically. That is, when supplying a corresponding fluid such as hydraulic oil into the annular gap 53 formed between the static part of the roll head 7 and the ferrule 5, a distance between the flange 51 of the ferrule 5 and the flange 73 of the roll head increases (see Fig. 3 ).
  • the indexing nut 95 is rotated such that the stopper collar 97 again approaches the pedestal 1. This rotation is performed until the scale on the indexing nut 95 shows the desired distance. In this state, if the position of the roll head 7 is slightly beyond the desired position (the distance between the inner side of the pedestal 1 and the roll head is too short), there is still a small gap between the stopper collar 97 and the pedestal 1.
  • This small gap is removed by releasing the hydraulic pressure from the annular gap 53. That is, by releasing the hydraulic pressure, the spring forces of the extending springs 92 and 93 effect a movement of the roll head 7 towards the machine center. Accordingly, the distance between the roll head 7 and the pedestal 1 is again increased until the stopper collar (ring part) 97 of the indexing nut 95 gets into abutment with the pedestal 1. Then, the desired position of the roll head 7 is set. Axial movements of the indexing rod 9 into both directions are facilitated by means of a slide bushing 96 provided in the bore 15.

Landscapes

  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Automatic Assembly (AREA)
EP19171556.4A 2019-04-29 2019-04-29 Schuhwalzenendmodul Active EP3733962B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19171556.4A EP3733962B1 (de) 2019-04-29 2019-04-29 Schuhwalzenendmodul
CN202010337584.7A CN111851110B (zh) 2019-04-29 2020-04-26 靴式辊端部模块分度

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19171556.4A EP3733962B1 (de) 2019-04-29 2019-04-29 Schuhwalzenendmodul

Publications (2)

Publication Number Publication Date
EP3733962A1 true EP3733962A1 (de) 2020-11-04
EP3733962B1 EP3733962B1 (de) 2024-08-28

Family

ID=66323737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19171556.4A Active EP3733962B1 (de) 2019-04-29 2019-04-29 Schuhwalzenendmodul

Country Status (2)

Country Link
EP (1) EP3733962B1 (de)
CN (1) CN111851110B (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991017308A1 (en) * 1990-05-08 1991-11-14 Valmet-Karlstad Ab Press roll
EP0619399A1 (de) * 1993-03-24 1994-10-12 Valmet Corporation Verfahren und Vorrichtung zur öffnung des Pressspaltes in einer Langspaltpresse
US5733415A (en) 1996-08-01 1998-03-31 Beloit Technologies, Inc. Closed shoe press head indexing system
EP1619299B1 (de) 2004-07-20 2009-03-11 Andritz Küsters GmbH Langspaltpresse

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1737257A (zh) * 2004-07-20 2006-02-22 埃杜阿德库斯特斯机器厂两合公司 形成延伸压区的装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991017308A1 (en) * 1990-05-08 1991-11-14 Valmet-Karlstad Ab Press roll
EP0619399A1 (de) * 1993-03-24 1994-10-12 Valmet Corporation Verfahren und Vorrichtung zur öffnung des Pressspaltes in einer Langspaltpresse
US5733415A (en) 1996-08-01 1998-03-31 Beloit Technologies, Inc. Closed shoe press head indexing system
EP1619299B1 (de) 2004-07-20 2009-03-11 Andritz Küsters GmbH Langspaltpresse

Also Published As

Publication number Publication date
CN111851110A (zh) 2020-10-30
EP3733962B1 (de) 2024-08-28
CN111851110B (zh) 2022-07-26

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