Pneumatic zone-controlled deflection compensation for roll
AssigneeAalto University Foundation sr
InventorsMikael Miettinen, Raine Viitala, Petri Kuosmanen
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Abstract
A deflection compensated roll, comprising a shaft, a shell configured to rotate around the shaft, one or more loading units between the shaft and the shell configured to adjust a nip load profile. The loading unit comprising a pressure chamber, a seal configured to seal the pressure chamber with pressurized gas, and a flexible mounting configured to mount the seal 4 flexibly on the shaft. Also, a method for controlling a nip load with a deflection compensated roll is disclosed.
Claims13
A deflection compensated roll, comprising:
- a shaft;
- a shell configured to rotate around the shaft;
- one or more loading units between the shaft and the shell configured to adjust a nip load profile, wherein the one or more loading units comprise
- a pressure chamber;
- a seal configured to seal the pressure chamber with pressurized gas;
- and
- a flexible mounting configured to mount the seal flexibly on the shaft;
- wherein the seal comprises, a body, a restrictor, and means for distributing pressurized gas to the restrictor;
- the restrictor has a surface facing a seal gap, an entirety of the surface is spaced from a mating surface of the shell to define the seal gap between the restrictor and the mating surface;
- and
- the restrictor is configured to flow the pressurized gas through the restrictor into the seal gap, wherein the pressurized gas is configured to keep the restrictor from contacting the mating surface.
A method for controlling a nip load with a deflection compensated roll, wherein the deflection compensated roll comprises:
- a shaft;
- a shell configured to rotate around the shaft;
- one or more loading units between the shaft and the shell, wherein the loading unit comprising a pressure chamber, a seal, and a flexible mounting, wherein the seal comprises, a body, a restrictor, and means for distributing pressurized gas to the restrictor, wherein the restrictor has a surface facing a seal gap, an entirety of the surface is spaced from a mating surface of the shell to define the seal gap between the restrictor and the mating surface, and wherein the restrictor is configured to flow the pressurized gas through the restrictor into the seal gap, wherein the method comprises:
- adjusting a nip load profile by the one or more loading units by
- sealing the pressure chamber with pressurized gas by the seal;
- and
- mounting the seal flexibly on the shaft.
Dependencies are inferred from the claim text.