Screening apparatus for fiber suspension
AssigneeVoith Sulzer Paper Technology North America, Inc.
InventorsKlaus Doelle, Kurt W. Lorenz, David W. Hostetter
Life of this patent
Estimating the term…
Abstract
A screening apparatus is used for screening acceptable and rejectable material from a pressurized fiber suspension. The screening apparatus includes a housing, a rotor, a screen basket and at least one sensor. The screen basket is positioned generally concentrically around the rotor, and includes at least one screen element. Each sensor is positioned in association with the screen basket. Each sensor is configured for sensing a wear parameter relating to a wear state of the screen element.
Claims18
A screening apparatus for screening acceptable and rejectable material from a pressurized fiber suspension, said screening apparatus comprising:
- a housing;
- a rotor;
- a screen basket positioned generally concentrically around said rotor, said screen basket including at least one screen element, at least one said screen element including at least one bimetallic part;
- and
- at least one sensor positioned in association with said screen basket, said sensor configured for sensing a wear parameter relating to a wear state of said at least one screen element including sensing of at least one of an electrical characteristic and thermal expansion of said bimetallic part.
A screening apparatus for screening acceptable and rejectable material from a pressurized fiber suspension, said screening apparatus comprising:
- a housing;
- a rotor;
- a screen basket positioned generally concentrically around said rotor, said screen basket including at least one screen element and at least one bimetal part associated with at least one said screet element;
- and
- at least one sensor positioned in association with said screen basket, said sensor configured for sensing a wear parameter relating to a wear state of said at least one screen element including sensing of at least one of pressure pulsations and thermal expansion within at least one said screen element, at least one said sensor being configured to sense thermal expansion of said bimetal part, said thermal expansion associated with said wear parameter.
A screening apparatus for screening acceptable and rejectable material from a pressurized fiber suspension, said screening apparatus comprising:
- a housing;
- a rotor;
- a screen basket positioned generally concentrically around said rotor, said screen basket including at least one screen element and at least one bimetal part associated with at least one said screen element;
- and
- at least one sensor positioned in association with said screen basket, said sensor configured for sensing a wear parameter relating to a wear state of said at least one screen element including sensing of at least one of pressure pulsations of the pressurized fiber suspension adjacent to said screen basket and thermal expansion of at least one said screen element, at least one said sensor being configured to sense an electrical characteristic of said bimetal part, said electrical characteristic associated with said wear parameter.
A screening apparatus for screening acceptable and rejectable material from a pressurized fiber suspension, said screening apparatus comprising:
- a housing;
- a rotor;
- a screen basket positioned generally concentrically around said rotor, said screen basket including at least one screen element and at least one bimetal part associated with at least one said screen element, said bimetal part including a electrically conductive metallic coating on said at least one screen element;
- and
- at least one sensor positioned in association with said screen basket, said sensor configured for sensing a wear parameter relating to a wear state of said at least one screen element including sensing of at least one of pressure pulsations of the pressurized fiber suspension adjacent to said screen basket and thermal expansion of at least one said screen element, at least one said sensor being configured to sense an electrical resistance of said coating, said electrical resistance associated with said wear parameter.
In a screening apparatus, a method of screening acceptable and rejectable material from a pressurized fiber suspension, said method comprising the steps of:
- providing a housing, a rotor within said housing, and a screen basket positioned generally concentrically around said rotor, said screen basket including at least one screen element;
- positioning a sensor in association with said screen basket;
- and
- sensing a wear parameter with said sensor, said wear parameter relating to a wear state of said at least one screen element including sensing of at least one of pressure pulsations of the pressurized fiber suspension adjacent to said screen basket and thermal expansion of at least one said screen element.
In a screening apparatus, a method of screening acceptable and rejectable material from a pressurized fiber suspension, said method comprising the steps of:
- providing a housing, a rotor within said housing, and a screen basket positioned generally concentrically around said rotor, said screen basket including at least one screen element and at least one bimetal part associated with at least one said screen element;
- positioning a sensors in association with said screen basket;
- and
- sensing a wear parameter with said sensor, said wear parameter relating to a wear state of said at least one screen element including sensing thermal expansion of said bimetal part, said thermal expansion associated with said wear parameter.
In a screening apparatus, a method of screening acceptable and rejectable material from a pressurized fiber suspension, said method comprising the steps of:
- providing a housing, a rotor within said housing, and a screen basket positioned generally concentrically around said rotor, said screen basket including at least one screen element and at least one bimetal part associated with at least one said screen element;
- positioning a sensor in association with said screen basket;
- and
- sensing a wear parameter with said sensor, said wear parameter relating to an electrical characteristic of said bimetal part.
Dependencies are inferred from the claim text.