Nip and loading analysis system
AssigneeMetso Paper, Inc.
InventorByron G. Muhs
Life of this patent
Estimating the term…
Abstract
A nip characterization system which has as inputs the pressure applied to the nip by the hydraulic loading devices, and loads applied at the end bearings and/or the loads applied to the roll support beam, and in addition directly measures nip load, has more than sufficient information to completely characterize the nip.
Claims11
A method of characterizing a deflection-compensated roll comprising the steps of:
- measuring nip forces with a plurality of nip force sensors positioned in a nip between a deflection-compensated roll shell and a backing element, wherein the deflection-compensated roll shell is mounted about a support beam;
- urging the support beam toward the backing element, and simultaneously measuring loads applied by loading arms to urge the support beam towards the backing element;
- measuring hydraulic pressure from internal to the roll shell, wherein the measured hydraulic pressure is used to support one or more pistons which operate to support the roll shell;
- and
- displaying on a display screen at least one value from;
- the plurality of nip force sensors, from the measured loads applied to loading arms, and from the measured hydraulic pressure from internal to the roll shell.
A method of characterizing a deflection-compensated roll comprising the steps of:
- measuring nip forces with a plurality of nip force sensors positioned in a nip between a deflection-compensated roll shell and a vacuum roll, wherein the deflection-compensated roll shell is mounted about a support beam;
- measuring hydraulic pressure from internal to the roll shell, the measured hydraulic pressure used to support one or more pistons which operate to support the roll shell;
- and
- measuring the vacuum pressure of the vacuum roll;
- and
- displaying on a display screen at least one value from:
- the plurality of sensors, the measured hydraulic pressure internal to the roll shell, and the vacuum pressure.
A method of characterizing a self-loading deflection-compensated roll comprising the steps of:
- measuring nip forces with a plurality of nip force sensors positioned in a nip between a deflection-compensated roll shell and a backing element;
- measuring hydraulic pressure from internal to the roll shell, the measured hydraulic pressure supporting one or more pistons which operate to support the roll shell and to move the shell into engagement with the backing element;
- and
- displaying on a display screen measured values from the plurality of nip force sensors, and from the measured hydraulic pressure internal to the roll shell.
A method of characterizing a self-loading deflection-compensated roll comprising the steps of:
- measuring nip forces with a plurality of nip force sensors positioned in a nip between a deflection-compensated roll shell and a vacuum roll;
- and
- measuring hydraulic pressure from internal to the roll shell, the measured hydraulic pressure supporting one or more pistons which operate to support the roll shell and to move the shell into engagement with the backing element;
- measuring the vacuum pressure of the vacuum roll;
- and
- displaying on a display screen at least one value selected from the group consisting of:
- the measured nip forces of the plurality of nip force sensors, the measured hydraulic pressure internal to the roll shell, and the vacuum pressure.
A method of characterizing a multi-nip board/paper press comprising the steps of:
- measuring the nip force with a plurality of nip force sensors positioned between and engaged with a first roll forming a first nip with a single roll, and measuring the nip force with a second plurality of nip force sensors positioned between and engaged with a second roll forming a second nip with the single roll;
- and
- measuring hydraulic pressure internal to the single roll which supports said first nip and measuring hydraulic pressure internal to the single roll which supports said second nip.
Dependencies are inferred from the claim text.