Roll with sensors for a machine for producing and/or processing a material web and machine for producing and/or processing a material web

Patent metadata

Field	Value
Publication number	US-9302871-B2
Application number	US-201314372053-A
Country	US
Kind code	B2
Filing date	Jan 8, 2013
Priority date	Jan 12, 2012
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A roll for a machine for processing a material web, in particular a paper, cardboard, or tissue machine, has a cylindrical roll core and a roll cover which is arranged on the radially outer lateral face of the roll core. The roll cover has a functional layer and a connecting structure which lies radially between the roll core and the functional layer. The radially outer lateral face of the functional layer provides a contact surface which can be brought into contact with the material web or a covering. A plurality of pressure and/or temperature-sensitive sensors are embedded in the roll cover. The sensors are arranged in the connecting structure or at the interface between the connecting structure and the functional layer.

First claim

The invention claimed is:

1. A roll for a machine for producing and/or processing a material web, the roll comprising:
a cylindrical roll core formed with a lateral surface;
a roll covering disposed on said lateral surface of said roll core, said roll covering including a functional layer and a connecting structure disposed to connect said roll core to said functional layer and having a plurality of connecting layers including an innermost connecting layer and a radially outermost connecting layer;
wherein a hardness and/or a modulus of elasticity of said connecting layers increases from layer to layer from said radially innermost connecting layer to said radially outermost connecting layer; and
a plurality of pressure-sensitive and/or temperature-sensitive sensors embedded in said roll covering and disposed in said connecting structure or at a boundary surface between said connecting structure and said functional layer.

2. The roll according to claim 1 , wherein at least some of said sensors are fiber-optic sensors.

3. The roll according to claim 2 , wherein at least some of said sensors are fiber Bragg gratings.

4. The roll according to claim 3 , wherein some or all of said fiber Bragg gratings of an optical waveguide have different Bragg wavelengths from one another.

5. The roll according to claim 2 , which comprises at least one optical waveguide comprising a plurality of said fiber-optic sensors, and wherein said fiber-optic sensors of the same optical waveguide are arranged along said optical waveguide in such a way that between successive portions of said optical waveguide with fiber-optic sensors there are formed portions without fiber-optic sensors and portions with fiber-optic sensors.

6. The roll according to claim 2 , which comprises a plurality of optical waveguides respectively comprising a plurality of fiber-optic sensors, wherein said optical waveguides are offset from one another, in a circum-circumferential direction of the roll, by 90°.

7. The roll according to claim 2 , which comprises a plurality of optical waveguides respectively comprising a plurality of fiber-optic sensors, wherein said optical waveguides are offset from one another, in a circumferential direction of the roll, by 180°.

8. The roll according to claim 1 , wherein said connecting layer in which said sensors are embedded or on which said sensors are disposed on a radially outer lateral surface has a greater hardness and/or a greater modulus of elasticity than said functional layer.

9. The roll according to claim 1 , wherein each of said connecting layers has a greater hardness and/or a greater modulus of elasticity than said functional layer.

10. The roll according to claim 1 , wherein said sensors are arranged on a radially outer lateral surface of one of said connecting layers at locations that do not form depressions with respect to other locations of the radially outer lateral surface.

11. The roll according to claim 1 , wherein one of the following applies:
said sensors are embedded in said radially outermost connecting layer;
said sensors are arranged on a radially outer lateral surface of said radially outermost said connecting layer;
said sensors are embedded in said radially innermost connecting layer or are arranged on a radially outer lateral surface thereof;
said sensors are embedded in a connecting layer or are arranged on a radially outer lateral surface thereof that lies between said radially innermost connecting layer and said radially outermost connecting layer.

12. The roll according to claim 1 , wherein said radially innermost connecting layer is formed from hard rubber or comprises hard rubber as a major constituent.

13. The roll according to claim 1 , wherein said radially innermost connecting layer is formed from a fiber composite material or comprises fiber composite material as a major constituent.

14. The roll according to claim 13 , wherein said fiber composite material is formed by fibers that are wound in a plurality of layers around said lateral surface of said roll core and embedded in a resin.

15. The roll according to claim 1 , wherein said functional layer comprises a material selected from the group consisting of polyurethane, rubber, and a fiber composite material as a major constituent.

16. The roll according to claim 1 , wherein said functional layer consists of a material selected from the group consisting of polyurethane, rubber, and a fiber composite material.

17. The roll according to claim 1 , wherein, in a radial direction of the roll, said connecting structure has a given thickness and said sensors are arranged in the radial direction at a height in said connecting structure that corresponds to 50% or more of said given thickness.

18. The roll according to claim 17 , wherein said sensors are arranged at a height in said connecting structure that corresponds to 80% or more of said given thickness of said connecting structure.

Assignees

• Voith Patent Gmbh

Inventors

• Breineder Martin
• Bischof Hubert
• Schmitt Matthias
• Shieh Yang

Classifications

• D21F3/06 Primary

  Means for regulating the pressure · CPC title

• D21G1/0286

  Regulating the axial or circumferential temperature profile of the roll · CPC title

• B65H20/02 Primary

  by friction roller · CPC title

• D21F3/08

  Pressure rolls · CPC title

• D21F3/105

  Covers thereof · CPC title