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WO1999064752A1 - Systeme de commande de paliers - Google Patents

Systeme de commande de paliers Download PDF

Info

Publication number
WO1999064752A1
WO1999064752A1 PCT/FI1999/000472 FI9900472W WO9964752A1 WO 1999064752 A1 WO1999064752 A1 WO 1999064752A1 FI 9900472 W FI9900472 W FI 9900472W WO 9964752 A1 WO9964752 A1 WO 9964752A1
Authority
WO
WIPO (PCT)
Prior art keywords
charging cylinder
roll
valve
pressure space
bearing
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.)
Ceased
Application number
PCT/FI1999/000472
Other languages
English (en)
Inventor
Juha Ehrola
Kari Holopainen
Juha Lahtinen
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 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 Oy filed Critical Valmet Oy
Priority to AU46189/99A priority Critical patent/AU4618999A/en
Priority to DE19983269T priority patent/DE19983269B4/de
Publication of WO1999064752A1 publication Critical patent/WO1999064752A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/02—Sliding-contact bearings
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0226—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F16C13/04—Bearings with only partial enclosure of the member to be borne; Bearings with local support at two or more points

Definitions

  • the present invention relates to a control system for bearings for a hydrostati- cally joumalled paper, board or finishing machine roll, constituting a nip with a backing roll, for opening and closing the nip and for establishing a linear load, said roll being joumalled by its axle to a bearing bracket or the like by means of hydraulically loadable bearing elements, at least one of said elements, a so- called main bearing element, acting in a main loading plane towards the backing roll and another, a so-called abutment element, in the main loading plane away from the backing roll, and said bearing elements being fitted with bearing shoes installable around the roll axle journal for supporting the discussed axle and thereby the entire roll rotatably relative to said bearing bracket or the like.
  • An object of the invention is to provide a control system for bearings as discussed above, which can be used in a simple manner to implement the opening and closing of a nip and to establish a desired linear load.
  • a further object of the invention is to provide a control system, which can be used for relieving the frame structures of a paper, board or finishing machine.
  • Another object of the invention is to enable in a paper, board or finishing machine the use of such frame structures that are capable of eliminating some of the vibration prob- lems.
  • Yet another object of the invention is to provide such an arrangement that the use of external cylinders, whenever necessary, can be limited solely to maneuvering the rolls.
  • the control system for bearings is characterized in that a pressure space in a charging cylinder for the bearing shoe of the main bearing element is adapted to be supplied with a desired hydraulic pressure through a conduit, said conduit being adapted to fork upstream of said pressure space for a first branch, the end of said branch closer to the charging cylin- der being adapted to close by the action of a charging cylinder piston as the piston approaches its position corresponding to an open position of the nip, and for a second branch, that the conduit is provided with a valve, which in a first position allows a flow into the charging cylinder and in a second position shuts it off, yet allows a flow of hydraulic fluid away from the pressure space of the charging cylinder, that the conduit has its forking point included in a section extending between the valve and the charging cylinder, and that the conduit has its second branch provided with a valve, which valve in a first position shuts off a flow into and out of the pressure space of the charging cylinder and in a second position allows a
  • the pressure space of the charging cylinder is preferably adapted to have a communication by way of a shut-off valve with a pressure line containing a brake pressure.
  • the shut-off valve is preferably provided with a control element adapted to open the shut-off valve and to maintain it in an open position as the charging cylinder piston approaches a position corresponding to the open position of the nip.
  • a pressure space in a charging cylinder for the bearing shoe of the abutment element is preferably adapted to be supplied with a constant hydraulic pressu- re.
  • the oil present in the pressure space supports, through the action of a shoe of the abutment element, the roll axle and dampens vibration but does not deny the roll a movement in a direction away from the main bearing element.
  • the pressure regulations for the main bearing element shoe are used for maneuvering the roll for opening and closing the nip, as well as for esta- bushing a load on the roll nip.
  • the arrangement in one preferred embodiment of the invention is such that the bearing brackets or the like for the roll and its backing roll are tied directly to each other by means of a paper, board or finishing machine frame and/or separate tie members.
  • the nip force progresses along a long route by way of the bottom cylinders and the entire frame structure from a bottom roll to a top roll.
  • the bearing With a high-speed opening capability, it is possible to lighten the mechanical frame structures and to fortify the loading system by virtue of a shorter power transmission.
  • the elimination of bottom cylinders also simplifies the control system.
  • the arrangement is such that the slide-joumalled backing roll is articulated, to be pivotable by means of a service cylinder, to a paper, board or finishing machine frame structure, the backing roll being provided with bracing elements which are adapted to be driven by means of the service cylinder against a solid response mounted or propped on the paper, board or finishing machine frame structure.
  • the service cylinder can be used for driving the backing roll against a response, resulting in a dynamically robust structure, and the actual loading is effected by means of the main bearing element of a bottom roll.
  • fig. 1 shows schematically a bearing assembly for one end of a roll constituting a nip with a backing roll, regarding shoes participating in maneuvering the roll in the direction of the nip.
  • Fig. 2 shows an exemplary embodiment for a bearing assembly of the invention in a schematic lateral view.
  • Fig. 1 shows schematically a control assembly for bearings for a hydrostatical- ly joumalled paper, board or finishing machine roll 2 constituting a nip N with a backing roll 1 , for opening and closing the nip N and for establishing a linear load.
  • the roll 2 is joumalled at both ends thereof by its axle 3 to a bearing bracket (not shown in fig. 1 ) or the like by means of hydraulically loadable bearing elements 5, 6. At least one of these elements, a so-called main bearing element 5, acts in a main loading plane A-A towards the backing roll 1 and one, a so-called abutment element 6, in the main loading plane away from the backing roll 1.
  • the bearing elements 5, 6 are fitted with bearing shoes 7, 8 installable around the journal of the axle 3 of the roll 2 for supporting the discussed axle 3 and thereby the entire roll 2 rotatably relative to said bearing bracket or the like.
  • the bearing assembly of fig. 1 only illustrates those shoes which participate in maneuvering the roll 2 in the main loading plane A-A.
  • the bearing shoes 7, 8 are provided with loading or charging cylinders 9, 16 propped fixedly to the bearing bracket or the like.
  • a pressure space 11 in the charging cylinder 9 for the bearing shoe 7 of the main bearing element 5 is adapted to be supplied with a desired hydraulic pressure through a conduit Pk.
  • the conduit Pk Upstream of said dpressure space 11 , the conduit Pk is adapted to fork for a first branch Pk1 and for a second branch Pk2.
  • the first branch Pk1 is extended into the pressure space 11 of the charging cylinder 9 in such a way that a charging cylinder piston 13 shits off the end of the first branch Pk1 closer to the charging cylinder 9 as the piston 13 approaches its position corresponding to an open position of the nip N.
  • the second branch Pk2 is extended into the pressure space 11 of the cylinder 9 in such a way that the piston's 13 position has no impact on a flow occurring through the discussed branch.
  • the conduit Pk is provided with a valve V, which in a first position a allows a flow into the pressure space 11 of the charging cylinder 9 and in a second position b shuts it off, yet allows a flow of hydraulic fluid away from the pressure space 11 of the charging cylinder 9 into a reservoir 22.
  • the conduit Pk has its forking point 14 included in a section extending between the valve V and the charging cylinder 9.
  • the conduit Pk has its second branch Pk2 provided with a valve Va, said valve having a first position d which blocks a flow into and out of the pressure space 11 of the charging cylinder 9 and a second position e which allows a flow into the pressure space 11 of the charging cylinder 9.
  • the pressure space 11 of the charging cylinder 9 is preferably adapted to have a communication by way of a shut-off valve Vj with a pressure line Pj containing a brake pressure.
  • the shut-off valve Vj is provided with a control element 15 adapted to open the shut-off valve Vj and to maintain it in an open position as the charging cylinder piston 13 approaches a position corresponding to an open position of the nip.
  • the control element 15 is constituted by a rod extending from the bottom of the piston 13 and adapted to open the shut-off valve Vj by using a spring 23 to displace a closure element 24 of the shut-off valve forcibly driven to a closing position and, thus, to enable the brake pressure contained in the pressure line Pj to flow into the pressure space 11 of the charging cylinder 9.
  • a pressure space 18 in the charging cylinder 16 for the bearing shoe 8 of the abutment element 6 is adapted to be supplied with a contant hydraulic pressure through a conduit P1. Said constant hydraulic pressure enables the bearing shoe 8 to support the axle 3 and to dampen vibrations, yet does not prevent the roll from moving towards the backing roll 1.
  • the control system for bearings operates as follows.
  • the drawing figure 1 depicts a condition in which the nip N is sealed. This status is reached by supplying the conduit Pk with pressure equivalent to a desired linear pressure and by opening an auxiliary valve Va, the pressure gaining an access along the branch Pk2 to underneath the loading piston 13 for the shoe 7.
  • the reason for this is that, when the shoe 7 is down, the piston 13 covers the inlet to the branch Pk1 of the supply conduit.
  • the shoe 7 and the roll 2 begin to move towards the backing roll 1.
  • the roll 2 stops as it comes to contact with the backing roll 1.
  • the roll nip N develops a linear load equivalent to the loading pressure.
  • the auxiliary valve Va is closed, yet a communication with the pressure space 11 is maintained through the branch Pk1.
  • the on-off valve V is switched to the position b for cutting off the connection of the supply conduit Pk to the pressure space 11 and for opening a communication from the pressure space 11 for discharging the pressure into the reservoir 22.
  • the shoe 7 and the roll 2 move away from the backing roll 1.
  • the rod 15 secured beneath the shoe 7 comes to contact with the valve Vj and opens it to some extent.
  • the brake pressure existing in the pressure line Pj behind the valve Vj gains an access to the pressure space 11 beneath the shoe 7 and stops the movement of the shoe 7 and the roll 2 after the valve Vj has opened sufficiently.
  • the piston 13, during its descent has closed the branch Pk1 of the loading pressure supply conduit.
  • the bearing brackets or the like for the roll 2 and its backing roll 1 can be tied directly to each other by means of a paper, board or finishing machine frame and/or separate tie members (not shown).
  • a slide-joumalled backing roll 1 is articulated, to be pivotable by means of a service cylinder 20 relative to an axle 26, to a paper, board or finishing machine frame structure 19.
  • the structure of fig. 2 comprises bracing elements 4' for the backing roll 1 , which are adapted to be driven by means of the service cylinder 20 against a solid response 21 mounted or propped on the frame structure 19, resulting in a dynamically robust structure and the nip load being created by means of the slide bearings 5 of the roll 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Paper (AREA)

Abstract

Système de commande de paliers pour un rouleau (2) de machine à papier, à carton ou finisseuse hydrostatiquement tourillonnée, constituant une ligne de contact (N) avec un contre-rouleau (1), qui est destiné à ouvrir et à fermer la ligne de contact (N) et à établir une charge linéaire, ledit rouleau (2) étant tourillonné par son essieu (3) à une chaise (4) de palier ou analogue à l'aide d'éléments (5, 6) de palier à charge hydraulique. Un espace de pression (11) situé dans un cylindre (9) de charge pour un sabot (7) de palier de l'élément principal (5) de palier est adapté pour recevoir une pression hydraulique désirée par un conduit (Pk), ledit conduit étant adapté pour se ramifier en amont dudit espace de pression (11) en une première branche (Pk1), l'extrémité de cette branche la plus proche du cylindre (9) de charge étant adaptée pour se fermer sous l'action d'un piston (13) du cylindre de charge lorsque ledit piston approche de sa position correspondant à une position ouverte de la ligne de contact (N), et en une seconde branche (Pk2). Le conduit (Pk) est doté d'une soupape (V) qui, dans une première position (a), permet l'entrée d'un flux dans le cylindre (9) de charge et dans une seconde position (b), ferme ledit conduit, mais permet à du fluide hydraulique de s'écouler hors de l'espace de pression (11) du cylindre (9) de charge. Le point de ramification (14) du conduit (Pk) est placé dans une partie qui s'étend entre la soupape (V) et le cylindre (9) de charge. La seconde branche (Pk2) du conduit (Pk) est dotée d'une soupape (Va) qui, dans une première position (d), empêche un flux de pénétrer dans l'espace de pression (11) du cylindre (9) de charge ou de sortir dudit espace, et dans une seconde position (e), permet à un flux de pénétrer dans l'espace de pression (11) du cylindre (9) de charge.
PCT/FI1999/000472 1998-06-05 1999-06-01 Systeme de commande de paliers Ceased WO1999064752A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU46189/99A AU4618999A (en) 1998-06-05 1999-06-01 Control system for bearings
DE19983269T DE19983269B4 (de) 1998-06-05 1999-06-01 Steueranlage für Lager

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI981283 1998-06-05
FI981283A FI103911B (fi) 1998-06-05 1998-06-05 Laakereiden ohjausjärjestely

Publications (1)

Publication Number Publication Date
WO1999064752A1 true WO1999064752A1 (fr) 1999-12-16

Family

ID=8551913

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1999/000472 Ceased WO1999064752A1 (fr) 1998-06-05 1999-06-01 Systeme de commande de paliers

Country Status (4)

Country Link
AU (1) AU4618999A (fr)
DE (1) DE19983269B4 (fr)
FI (1) FI103911B (fr)
WO (1) WO1999064752A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007048873A1 (fr) * 2005-10-07 2007-05-03 Metso Paper, Inc. Systeme de palier-glisseur pour calandre multi-rouleaux

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1382268A (fr) * 1963-11-05 1964-12-18 Loire Atel Forges Palier à faible coefficient de frottement
US4041752A (en) * 1975-02-13 1977-08-16 Escher Wyss Limited Rolling mills having hydraulic forces exerted on the exterior roll surfaces
US5509883A (en) * 1994-03-09 1996-04-23 Valmet Paper Machinery, Inc. Tubular roll for a paper machine or equivalent with glide-bearings
WO1998036185A1 (fr) * 1997-02-14 1998-08-20 Valmet Corporation Systeme de commande de palier destine a un cylindre a paliers hydrostatiques

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH659865A5 (de) * 1982-07-30 1987-02-27 Escher Wyss Ag Hydrostatisches stuetzelement und dessen verwendung in einer walzvorrichtung.
DE3702245C3 (de) * 1987-01-27 1993-12-23 Kleinewefers Gmbh Kalander
FI111026B (fi) * 1997-02-14 2003-05-15 Metso Paper Inc Laakereiden ohjausjärjestelmä hydrostaattisesti laakeroitua telaa varten
FI117486B (fi) * 1997-02-14 2006-10-31 Metso Paper Inc Tela paperikonetta tai paperin jälkikäsittelylaitetta varten

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1382268A (fr) * 1963-11-05 1964-12-18 Loire Atel Forges Palier à faible coefficient de frottement
US4041752A (en) * 1975-02-13 1977-08-16 Escher Wyss Limited Rolling mills having hydraulic forces exerted on the exterior roll surfaces
US5509883A (en) * 1994-03-09 1996-04-23 Valmet Paper Machinery, Inc. Tubular roll for a paper machine or equivalent with glide-bearings
WO1998036185A1 (fr) * 1997-02-14 1998-08-20 Valmet Corporation Systeme de commande de palier destine a un cylindre a paliers hydrostatiques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007048873A1 (fr) * 2005-10-07 2007-05-03 Metso Paper, Inc. Systeme de palier-glisseur pour calandre multi-rouleaux

Also Published As

Publication number Publication date
FI103911B1 (fi) 1999-10-15
DE19983269B4 (de) 2009-02-12
DE19983269T1 (de) 2001-05-17
FI103911B (fi) 1999-10-15
AU4618999A (en) 1999-12-30
FI981283A7 (fi) 1999-10-15
FI981283A0 (fi) 1998-06-05

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