Roll machine and process for operating the same
AssigneeVoith Sulzer Papiertechnik Patent GmbH
InventorFranz Kayser
Life of this patent
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Abstract
A roll machine is provided. A plurality of rolls are disposed in a stack to define a plurality of nips therebetween adapted to treat a material web. At least two of the plurality of rolls are driven rolls. A drive control commonly controls the driven rolls. The drive control varies a driving torque distribution of the driven rolls over time. A method for operating the above roll machine is also provided, where the method includes changing a driving torque distribution of said driven rolls.
Claims34
A roll machine, comprising:
- a plurality of rolls disposed in a stack to define a plurality of nips therebetween adapted to treat a material web;
- at least two of said plurality of rolls being driven rolls;
- and
- a drive control which commonly controls said driven rolls, said drive control varying a driving torque distribution of said driven rolls over time.
A method for operating a roll machine, said roll machine including a plurality of rolls formed in a stack to define a plurality of nips therebetween, at least two of said plurality of rolls being driven rolls, and a drive control which commonly controls said driven rolls, the method comprising:
- changing a driving torque distribution of said driven rolls.
A roll machine, comprising:
- a plurality of rolls defining a plurality of nips, at least two of said rolls being driven rolls;
- and
- a drive control, said driving control setting at least first and second driving torque distributions for said driven rolls;
- and
- wherein, for each of said at least first and second torque distributions, said driving control causes each of said driven rolls to operate at a driving torque which is less then 100% of torque necessary to properly operate said roll machine, and to collectively operate at a driving torque which is at least 100% of torque necessary to properly operate said roll machine.
A roll machine for at least moving a material web, comprising:
- a plurality of rolls, including at least first and second driven rolls, said rolls defining a plurality of nips;
- and
- said at least first and second rolls collectively providing at least sufficient torque to properly move said material web through said roll machine, and individually providing at least a portion of said at least sufficient torque;
- wherein a torque provided by each of said first and second driven rolls changes over time.
A method for operating a roll machine for at least moving a material web, said roll machine comprising a plurality of rolls including at least two driven rolls, the rolls defining a plurality of nips, said method comprising:
- collectively driving said at least two driven rolls to provide at least a proper operating torque required to properly move said material web through said roll machine;
- distributing said at least proper operating torque amongst said at least two driven rolls, wherein each of said at least two driven rolls provides at least a portion of said proper operating torque;
- redistributing said proper operating torque amongst said at least two driven rolls, wherein each of said at least two driven rolls provides at least a portion of said proper operating torque, such that at least one of said at least two driven rolls provides a different amount of torque than before said redistribution.
A method for operating a roll machine for at least moving a material web, said roll machine comprising a plurality of rolls including at least two driven rolls, the rolls defining a plurality of nips, said method comprising:
- establishing a first driving torque distribution between said at least two rolls such that said at least two driven rolls collectively provide at least a proper operating torque required to properly move said material web through said roll machine, and individually provide at least a portion of said proper operating torque;
- driving said at least two driven rolls in accordance with said first driving torque distribution;
- establishing a second driving torque distribution between said at least two rolls such that said at least two driven rolls collectively provide at least a proper operating torque required to properly move said material web through said roll machine, and individually provide at least a portion of said proper operating torque;
- transitionally driving said at least two driven rolls from said first driving torque distribution to said second driving torque distribution;
- and
- second driving said at least two driven rolls in accordance with said second driving torque distribution;
- wherein said first and second driving torques differ such that at least one of said at least two driven rolls is driven at different torques during said first and second driving.
A method for operating a roll machine for at least moving a material web, said roll machine comprising a plurality of rolls including at least two driven rolls, the rolls defining a plurality of nips, said method comprising:
- establishing a driving torque distribution, such that said at least two driven rolls collectively provide a proper operating torque to operate said roll machine, and individually provide at least a portion of said proper operating torque;
- and
- establishing a driving torque distribution, such that said at least two driven rolls provide at least a portion of said proper operating torque;
- and
- changing said driving torque distribution over time.
Dependencies are inferred from the claim text.