Suction roll for a machine for producing and/or processing a paper, cardboard or tissue web

Patent metadata

Field	Value
Publication number	US-9506191-B2
Application number	US-201314421329-A
Country	US
Kind code	B2
Filing date	Aug 9, 2013
Priority date	Aug 15, 2012
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A roller has a movable roller sleeve and a positive-pressure or negative-pressure zone inside the roller sleeve. The zone is sealed outwardly by a sealing installation with at least one sealing strip. The sealing strip in the radial direction of the roller is movable from the roller toward the inner side and away therefrom and the sealing strip has a lubricant outlet opening connected to a supply line for delivering lubricant to between the inner side of the roller sleeve and the sealing face. The supply line includes one part running within the sealing strip and one part running outside the sealing strip but within the roller. The part of the supply line within the roller, on its length which is routed outside the sealing strip, includes a first portion that is longer than a second line portion. The second line portion is more flexural than the first line portion.

First claim

The invention claimed is:

1. A roller for a machine for manufacturing or processing a fibrous web, the roller comprising:
a movable roller sleeve and a positive-pressure or negative-pressure zone formed inside said roller sleeve and rotationally fixed relative to said roller sleeve;
a sealing installation configured to seal said positive-pressure or negative-pressure zone relative to an environment, said sealing installation having at least one sealing strip disposed for movement in a radial direction relative to the roller radially inwardly and away therefrom;
said sealing strip having a sealing face toward an inner side of said movable roller sleeve, said sealing face having at least one lubricant outlet opening formed therein;
a supply line connected to said at least one lubricant opening for delivering lubricant to between the inner side of said movable roller sleeve and said sealing face, said supply line including a first part running within said sealing strip and a second part running outside said sealing strip but within the roller;
said second part of said supply line that runs within the roller, on a length which is routed outside said sealing strip, includes a first line portion and a second line portion, said first line portion being longer than said second line portion and said second line portion more flexural than said first line portion; and
said supply line including a fourth line portion connected to said sealing strip and a third line portion releasably connected to said fourth line portion, said supply line including a connection element configured for releasably interconnecting said third and fourth line portions.

2. The roller according to claim 1 , wherein said supply line is routed out of the roller at a longitudinal roller end of the roller.

3. The roller according to claim 2 , wherein said first line portion commences at the roller end and extends in the roller in a direction of said sealing strip, and/or said second line portion commences in a region of at most one meter from a point at which said supply line is routed out of said sealing strip.

4. The roller according to claim 1 , wherein said second line portion has a length in a range from 15 cm to 200 cm.

5. The roller according to claim 4 , wherein said second line portion has a length in a range from 20 cm to 150 cm.

6. The roller according to claim 1 , wherein said fourth line portion is non-releasably connected to said sealing strip.

7. The roller according to claim 6 , wherein said connection element is disposed in a region of the at least one point at which said supply line is routed out of said sealing strip.

8. The roller according to claim 1 , wherein:
said sealing installation comprises a sealing-strip holder for holding said sealing strip, said sealing-strip holder having a holding portion with at least one guide face on which said sealing strip with at least one of two sides of a front or rear end side is mounted so as to be displaceable along a path when viewed in the radial direction of the roller;
said supply line at at least one point on at least one of the two sides of the front and rear end sides is routed out of said sealing strip and said holding portion has at least one clearance through which that portion of said supply line which is routed out of the at least one side of the front or rear end side of said sealing strip is routed through said sealing-strip holder; and
the at least one clearance is configured so that said sealing strip together with the portion of said supply line which is routed out therefrom is movable along the path in relation to said sealing-strip holder.

9. The roller according to claim 8 , wherein said at least one clearance is formed in a shape of a hole or an upwardly open groove.

10. The roller according to claim 1 , wherein said sealing strip comprises an upper side facing the inner side of said roller sleeve and which includes the sealing face and the at least one lubricant outlet opening.

11. The roller according to claim 1 , wherein said at least one lubricant outlet opening is a lubricant channel formed as a groove-shaped depression in said sealing strip, said groove-shaped depression being formed in a material of said sealing strip and having a longitudinal extent extending in a longitudinal direction of said sealing strip.

12. The roller according to claim 11 , wherein said sealing strip is delimited in a length thereof by two ends, and said sealing strip, at said two ends, having in each case one wall which delimits a length of said lubricant channel.

13. The roller according to claim 1 , wherein said supply line comprises a central supply duct extending within said sealing strip along a longitudinal direction thereof, and at least one riser line interconnecting said lubricant channel and said central supply duct.

14. The roller according to claim 13 , wherein said central supply duct, along a longitudinal extent thereof, has a variable cross-sectional area and/or cross-sectional geometry.

15. The roller according to claim 1 , wherein said sealing strip has a central portion with a length amounting to a plurality of meters and each end portion thereof has a length of 20 cm or less.

16. The roller according to claim 15 , wherein each end portion has a length of 10 cm or less.

17. The roller according to claim 1 , wherein said sealing strip has a width delimited by one front and one rear end side, the upper side of said sealing strip extending therebetween, and, during rotation of the roller sleeve, said roller sleeve runs onto said sealing strip on the front end side and runs off on the rear end side, and wherein said lubricant channel is disposed between the front end side and the sealing face.

18. A sealing installation according to claim 1 , wherein the lubricant channel, when viewed in a sectional plane perpendicular to the longitudinal extent of the sealing strip, has a lowest point, a front side wall extending therefrom in the direction of the front end side and a rear side wall extending therefrom in the direction of the sealing face, wherein the upper edge of the front side wall adjoins the front end side and the upper edge of the rear side wall adjoins the sealing face, and wherein, upon installation of the sealing installation in the roller according to claim 1 , a straight line interconnecting the two upper edges and the horizontal encloses an angle of 1° to 89°.

19. The sealing installation according to claim 18 , wherein the straight line interconnecting the two upper edges enclosed an angle of between 15° and 80° with the horizontal.

20. The roller according to claim 1 , wherein said fourth line portion is integral with or non-releasably connected to said sealing strip.

Assignees

• Voith Patent Gmbh

Inventors

• Erkelenz Marc
• Honold Jochen

Classifications

• D21F3/10 Primary

  Suction rolls, e.g. couch rolls · CPC title

• D21F5/143 Primary

  through perforated cylinders · CPC title